Focused terahertz waves generated by a phase velocity gradient in a parallel-plate waveguide
|
|
- Andrea Thomas
- 6 years ago
- Views:
Transcription
1 Focused terahertz waves generated by a phase velocity gradient in a parallel-plate waveguide Robert W. McKinney, 1 Yasuaki Monnai, Rajind Mendis, 1 and Daniel Mittleman 1,* 1 Department of Electrical & Computer Engineering, MS-378, Rice University, 6100 Main St., Houston Texas 77005, USA Department of Applied Physics and Physico-Informatics, Keio University, Hiyoshi, Kohoku-ku, Yokohamashi, Kanagawa 385 Japan * mittleman@brown.edu Abstract: We demonstrate the focusing of a free-space THz beam emerging from a leaky parallel-plate waveguide (PPWG). Focusing is accomplished by grading the launch angle of the leaky wave using a PPWG with gradient plate separation. Inside the PPWG, the phase velocity of the guided TE 1 mode exceeds the vacuum light speed, allowing the wave to leak into free space from a slit cut along the top plate. Since the leaky wave angle changes as the plate separation decreases, the beam divergence can be controlled by grading the plate separation along the propagation axis. We experimentally demonstrate focusing of the leaky wave at a selected location at frequencies of 100 GHz and 170 GHz, and compare our measurements with numerical simulations. The proposed concept can be valuable for implementing a flat and wide-aperture beam-former for THz communications systems. 015 Optical Society of America OCIS codes: ( ) Waveguides; ( ) Radio frequency photonics. References and links 1. R. Piesiewicz, T. Kleine-Ostmann, N. Krumbholz, D. M. Mittleman, M. Koch, J. Schoebel, and T. Kürner, Short-range ultra broadband terahertz communications: Concepts and perspectives, IEEE Antennas Propag. Mag. 49(6), 4 39 (007).. J. Federici and L. Moeller, Review of terahertz and sub-terahertz wireless communications, J. Appl. Phys. 107(11), (010). 3. T. Kleine-Ostmann and T. Nagatsuma, A review on terahertz communications research, J. Infrared Milli. Terahertz Waves 3, (011). 4. H.-T. Chen, W. J. Padilla, J. M. O. Zide, A. C. Gossard, A. J. Taylor, and R. D. Averitt, Active terahertz metamaterial devices, Nature 444(7119), (006). 5. W. Gao, J. Shu, K. Reichel, D. V. Nickel, X. He, G. Shi, R. Vajtai, P. M. Ajayan, J. Kono, D. M. Mittleman, and Q. Xu, High-contrast terahertz wave modulation by gated graphene enhanced by extraordinary transmission through ring apertures, Nano Lett. 14(3), (014). 6. B. Bowden, J. A. Harrington, and O. Mitrofanov, Silver/polystyrene-coated hollow glass waveguides for the transmission of terahertz radiation, Opt. Lett. 3(0), (007). 7. M. Mbonye, R. Mendis, and D. M. Mittleman, Measuring TE 1 mode losses in terahertz parallel-plate waveguides, J. Infrared Milli. Terahertz Waves 34, (013). 8. Y. Monnai, K. Altmann, C. Jansen, H. Hillmer, M. Koch, and H. Shinoda, Terahertz beam steering and variable focusing using programmable diffraction gratings, Opt. Express 1(), (013). 9. J. V. Rudd and D. M. Mittleman, The influence of substrate lens design in terahertz time-domain spectroscopy, J. Opt. Soc. Am. B 19(), (00). 10. W. L. Chan, H. T. Chen, A. J. Taylor, I. Brener, M. J. Cich, and D. M. Mittleman, A spatial light modulator for terahertz beams, Appl. Phys. Lett. 94(1), (009). 11. C. M. Watts, D. Shrekenhamer, J. Montoya, G. Lipworth, J. Hunt, T. Sleasman, S. Krishna, D. R. Smith, and W. J. Padilla, Terahertz compressive imaging with metamaterial spatial light modulators, Nat. Photonics 8(8), (014). 1. C. A. Balanis, Modern Antenna Handbook (John Wiley & Sons, 008). 13. M. Garcia-Vigueras, J. L. Gomez-Tornero, G. Goussetis, A. R. Weily, and Y. J. Guo, 1D-leaky wave antenna employing parallel-plate waveguide loaded with PRS and HIS, IEEE Trans. Antenn. Propag. 59(10), (011). 14. N. Karl, R. W. McKinney, Y. Monnai, R. Mendis, and D. M. Mittleman, Frequency-division multiplexing in the terahertz range using a leaky wave antenna, Nat. Photonics 9, (015). (C) 015 OSA 19 Oct 015 Vol. 3, No. 1 DOI: /OE OPTICS EXPRESS 7947
2 15. T. A. Milligan, Modern Antenna Design (John Wiley & Sons, 005). 16. R. Mendis and D. M. Mittleman, Comparison of the lowest-order transverse-electric (TE 1 ) and transversemagnetic (TEM) modes of the parallel-plate waveguide for terahertz pulse applications, Opt. Express 17(17), (009). 17. R. Mendis and D. M. Mittleman, An investigation of the lowest-order transverse-electric (TE 1 ) mode of the parallel-plate waveguide for THz pulse propagation, J. Opt. Soc. Am. B 6(9), A6 A13 (009). 18. R. Mendis and D. M. Mittleman, A D artificial dielectric with 0 < n < 1 for the terahertz region, IEEE Trans. Microw. Theory Tech. 58(7), (010). 19. R. Mendis, J. Liu, and D. M. Mittleman, Terahertz mirage: Deflecting terahertz beams in an inhomogeneous artificial dielectric based on a parallel-plate waveguide, Appl. Phys. Lett. 101(11), (01). 0. J. Liu, R. Mendis, and D. M. Mittleman, A Maxwell s fish eye lens for the terahertz region, Appl. Phys. Lett. 103(3), (013). 1. M. Mbonye, R. Mendis, and D. M. Mittleman, Inhibiting the TE 1 -mode diffraction losses in terahertz parallelplate waveguides using concave plates, Opt. Express 0(5), (01).. J. Deibel, M. Escarra, N. Berndsen, K. Wang, and D. M. Mittleman, Finite element method simulations of guided wave phenomena at terahertz frequencies, Proc. IEEE 95(8), (007). 1. Introduction As the growth of mobile data traffic accelerates, bandwidth availability is becoming an increasing concern [1 3]. With current wireless technology, operating in the 1-5 GHz range, it is already not possible to meet the existing demand. Even the next-generation wireless protocols at 60 GHz will not provide adequate bandwidth within a few years. As a result, there is growing interest in using the frequency range above a few hundred GHz for shortrange, broadband wireless communications. At such high frequencies, crossing into the THz range, communications systems will require capabilities that are not supported by existing devices. This challenge has motivated much recent research, for example in the development of modulators [4,5], low-loss waveguides [6,7], and beam steering components [8]. Fig. 1. (a) An illustration of the parallel-plate waveguide with a slot aperture. The TE 1 mode is a fast mode, and therefore can couple to free-space waves through the slot. (b) The launch angle θ is defined relative to the waveguide normal. Despite this growing body of research, numerous difficult problems remain unaddressed. One important example is wavefront engineering that is, the manipulation of a wavefront for optimizing the throughput of a communication channel. In the THz range, wireless transmission will likely rely on point-to-point connections using highly directional or even focused beams [1,]. In such applications, wavefront engineering will be a critical need for optimizing system performance. Conventional integrated THz transmitters are often equipped with silicon substrate lenses [9]. However, fixed components do not afford the possibility of dynamically changing the THz wave front in response to changing system needs. (C) 015 OSA 19 Oct 015 Vol. 3, No. 1 DOI: /OE OPTICS EXPRESS 7948
3 More recent work has reported the development of metamaterial-based multi-pixel modulators for spatial wavefront control, which can be dynamically reconfigured [10,11]. Such bulky components are less favorable in mobile device applications. Alternative techniques are important for fulfilling this compelling need. Leaky-wave antennas have been used in the microwave and RF spectral ranges as highly directional and versatile antennas since the 1940 s and continue to be used as novel transmitters and receivers to this day [1 14]. In a leaky-wave antenna, a travelling wave is guided along a main waveguiding structure and radiates outward azimuthally from the propagation axis [15]. Conventionally, a rectangular waveguide has been used as the main waveguide structure. The travelling wave inside the rectangular waveguide is a fast wave with a phase velocity greater than the vacuum speed of light. This leads to an effective refractive index less than unity [1 15]. By opening a slot along the side wall of the waveguide, one connects the two media inside and outside the waveguide, thus allowing the traveling wave to leak into free space at an angle determined by Snell s Law. Although this mechanism would also work in the THz range, direct scaling of a rectangular waveguide from the microwave to the THz range is impractical due both to increasing metallic losses and significantly more challenging fabrication.. Results and discussion In this article, we propose the use of a metal parallel-plate waveguide (PPWG) as a leakywave antenna which can also offer a unique method for wavefront engineering. The PPWG, operating in its lowest-order transverse electric (TE 1 ) mode [16,17], offers a practical implementation of a leaky-wave antenna for the THz range, as illustrated in Fig. 1(a). As in the rectangular waveguide, the PPWG s TE 1 mode, where the electric field is polarized parallel to the metal plates, propagates with an effective refractive index smaller than one. Therefore, a slit cut along the top plate can leak the travelling wave into free space. Specifically, the effective refractive index for waves propagating in the TE 1 mode in a PPWG is given by c n e = 1 bf where b is the plate separation, f is the frequency, and c is the light speed [18]. Then, the launch angle is determined by the Snell s law as (1) sinθ = n e () where θ is the angle measured from the broadside orientation as illustrated in Fig. 1b. Since the angle at which the leaky wave is launched depends on the plate separation b, it is possible to adjust the beam divergence by varying the plate separation along the propagation axis. Ordinarily, a variation in the plate separation could lead to the introduction of higherorder waveguide modes. However, we have previously demonstrated [18 0] that a continuous variation of the plate separation can be effected without inducing any higher-order mode conversion, as long as the change in the plate spacing is gradual (on the scale of the wavelength). Thus, one can introduce a smoothly varying effective refractive index for the guided wave inside the waveguide by controlling the plate separation, and therefore create an almost arbitrary spatial profile for the effective refractive index n e (x,y) in the waveguide plane. This degree of freedom proves to be extremely valuable for various applications including the manipulation of terahertz guided wavefronts [19] and for the construction of novel waveguide-based optical components [0], as well as for improving the lateral confinement in an open waveguide structure like the PPWG [7,1]. (C) 015 OSA 19 Oct 015 Vol. 3, No. 1 DOI: /OE OPTICS EXPRESS 7949
4 Fig.. (left) A schematic of the experimental setup. A THz pulse is emitted from the fibercoupled photoconductive antenna, and then focused using a confocal lens setup with teflon lenses. The focused beam excites the TE 1 mode of the PPWG. The receiver performs a raster scan around the focal point. (right) The launch angle is adjusted along the waveguide axis by variation of the plate separation b(x). Focusing is achieved by adjusting the angle such that all emerging rays converge at (x 0,z 0 ). Here, we combine this idea of engineering n e (x,y) with the concept of a leaky-wave waveguide to demonstrate that a leaky-wave can be focused in free space. As seen from Eqs. (1) and (), the launch angle of the guided wave depends on the plate separation. Thus, the beam emerging from the waveguide can be focused at a predefined location above the leakywave slot when all of the waves arrive at that point with equivalent phase (i.e., exhibiting constructive interference). To compute the necessary plate separation function, we first choose a specific location (x 0,z 0 ) for the focal point, referenced to the coordinate system defined in Fig. 1 and Fig.. Here, the x coordinate is the waveguide propagation axis (parallel to the slot in the upper waveguide plate), and the z axis points perpendicular to the axis of the slot. (The plane x = 0 corresponds to the waveguide input facet. The z = 0 plane is the upper surface of the upper metal plate.) We can use the fact that the emission angle θ is geometrically related to the values x 0 and z 0 according to sinθ = x x 0 z + 0 ( x x 0 ) and then solve for the plate separation b as a function of position x along the waveguide to find c x x b( x) = 1+ 0 f z 0 It should be mentioned that the plate separation b(x) becomes minimum at x = x 0, which is the x coordinate of the chosen focal point, and this plate separation corresponds to the cutoff condition for the TE 1 mode. Therefore, it is preferable to define the location of the focal point so that x 0 is no less than L, where L is the length of the waveguide as illustrated in Fig.. Using Eq. (4), we construct several leaky-wave PPWGs to demonstrate the principle. For each waveguide, the top plate was fabricated using an aluminum sheet of 1 mm thickness, cut to a 50 mm by 50 mm square with a slit of 3 mm width and a length of 4 mm cut along the middle of the square. Thus, during the first 8 mm of guided wave propagation, the guided (3) (4) (C) 015 OSA 19 Oct 015 Vol. 3, No. 1 DOI: /OE OPTICS EXPRESS 7950
5 mode is strictly contained between the two parallel plates, and can only leak out after it has passed this initial propagation length. To fabricate the bottom plate with a curved inner surface, we employ 3D printing. We print a polymer form with the surface height profile defined by Eq. (4), and then apply a metal coating using a metal spray paint, with sufficient thickness so that the object behaves as if it were a solid metal [0]. We then join the top and bottom plates with plastic spacers, to guarantee that the plate separation is correct at all points inside the waveguide. We demonstrate two particular focusing leaky waveguide geometries, designed to focus frequencies of 100 GHz and 170 GHz respectively. For both designs, we chose the focal point to be at x0 = 50 mm; that is, the focal point was chosen to be directly above the end of the waveguide (since x0 = L). For the 100 GHz model, we chose a focal height of z0 = 50 mm above the top plate, while for the 170 GHz version, we chose a height of z0 = 30 mm. The device was experimentally characterized using the setup shown in Fig.. It consists of a commercial THz-TDS system for generating and detecting THz radiation, using fibercoupled photoconductive antennas. A broadband THz pulse is delivered through a confocal lens system consisting of 60 mm and 100 mm focal length lenses. This produced a 1/e beam width of 10 mm at the waveguide input facet for all frequencies of interest. The transmitter was oriented to produce radiation polarized in the y-direction, in order to efficiently excite the TE1 waveguide mode. To map out the electric field of the radiation above the slot, we raster scan the receiver in two dimensions, and measure the time-domain waveform at each spatial location. We extract the spectral amplitude at a given frequency by Fourier transform, and plot the results as the amplitude of the extracted frequency component vs. the receiver position. Fig. 3. Simulated and experimental results of the leaky-wave focusing. The calculated (left) and measured (right) field amplitudes are presented for the two waveguides designed for focusing at (a) (x0, z0) = (50 mm, 50 mm) at 100 GHz, and (b) (50 mm, 30 mm) at 170 GHz. The rectangular area (white dashed line) in the simulation indicates the area scanned in the measurements. Calculations are the result of finite element simulations using a commercial software package. Note that the color bar is normalized for the peak value inside the measured area, which is indicated by the broken rectangle. Outside the measured area, especially in the vicinity of the waveguide surface, the E-field is larger and the red color is saturated. In Fig. 3, we compare these experimental results to numerical simulations of the realistic waveguide configuration, performed using a commercial software package []. In both cases, we clearly observe focusing at the predefined focal points. The cross-sectional field profiles are shown in Fig. 4, compared with the corresponding results from the numerical simulations. We observe that the measured field profiles both peak at x = 50 mm, precisely consistent with the design criteria and with the numerical simulations, at both frequencies. The agreement is not as accurate for the z axis, but the trend is still reproduced. Clearly, the experimentally observed beam width is much wider than in the simulation, for both waveguides. This effect is mostly due to the finite spatial resolution and finite acceptance angle of the receiver used to map the field profile, but could also be a result of small fabrication errors or finite conductivity losses and surface roughness of the metal components which are not accounted for in the simulations. #45988 (C) 015 OSA Received 15 Jul 015; revised 9 Sep 015; accepted 9 Sep 015; published 15 Oct Oct 015 Vol. 3, No. 1 DOI: /OE OPTICS EXPRESS 7951
6 Fig. 4. Cross-sectional field profiles through the focal points, for the two design frequencies along (a) the x (horizontal) axis and (b) the z (vertical) axis. The thick curves are the measured data, while the thin curves show the numerical simulations. The leaky waveguide performance can be improved in a number of ways. For example, it will be possible to compensate for the field decay along the radiation aperture by gradually increasing the slit width so that more radiation is emitted as the wave travels. Moreover, while we have considered variation of the plate separation along the propagation axis in this paper, we could also implement a gradient or curved plate separation in the direction transverse to the guided wave propagation axis. This would be advantageous for counteracting beam divergence in the unconfined direction inside the PPWG [7,1] and enhancing the efficiency of the device. Also, we note that, while the leaky-wave antenna focuses in the x-z plane, the radiation is freely diffracting in the y direction. To focus the beam also in the y direction, we could extend the aperture geometry, for example by making a parallel slot array. Finally, we can imagine constructing an active device using a MEMS architecture. 3. Conclusions In conclusion, we have demonstrated a focusing THz leaky wave antenna using a PPWG with a gradient plate separation. With a phase velocity greater than the vacuum speed of light, the TE 1 mode can be utilized to control the spatial mode of the leaky waves. The proposed structure could replace bulky lens components and offer efficient off-axis quasi-optic coupling of THz radiation from planar guided-wave THz systems. Acknowledgments This work was funded in part by the US Army Research Office and by the W. M. Keck Foundation. (C) 015 OSA 19 Oct 015 Vol. 3, No. 1 DOI: /OE OPTICS EXPRESS 795
Dielectric-lined cylindrical metallic THz waveguides: mode structure and dispersion
Dielectric-lined cylindrical metallic THz waveguides: mode structure and dispersion Oleg Mitrofanov 1 * and James A. Harrington 2 1 Department of Electronic and Electrical Engineering, University College
More informationCommunications with THz Waves: Switching Data Between Two Waveguides
J Infrared Milli Terahz Waves (017) 38:1316 130 DOI 10.1007/s1076-017-048-4 Communications with THz Waves: Switching Data Between Two Waveguides J. Ma 1 & M. Weidenbach & R. Guo & M. Koch & D. M. Mittleman
More informationMicrowave switchable frequency selective surface with high quality factor resonance and low polarization sensitivity
263 Microwave switchable frequency selective surface with high quality factor resonance and low polarization sensitivity Victor Dmitriev and Marcelo N. Kawakatsu Department of Electrical Engineering, Federal
More informationSlot waveguide-based splitters for broadband terahertz radiation
Slot waveguide-based splitters for broadband terahertz radiation Shashank Pandey, Gagan Kumar, and Ajay Nahata* Department of Electrical and Computer Engineering, University of Utah, Salt Lake City, Utah
More informationANALYSIS OF EPSILON-NEAR-ZERO METAMATE- RIAL SUPER-TUNNELING USING CASCADED ULTRA- NARROW WAVEGUIDE CHANNELS
Progress In Electromagnetics Research M, Vol. 14, 113 121, 21 ANALYSIS OF EPSILON-NEAR-ZERO METAMATE- RIAL SUPER-TUNNELING USING CASCADED ULTRA- NARROW WAVEGUIDE CHANNELS J. Bai, S. Shi, and D. W. Prather
More informationSchool of Electrical Engineering. EI2400 Applied Antenna Theory Lecture 10: Leaky wave antennas
School of Electrical Engineering EI2400 Applied Antenna Theory Lecture 10: Leaky wave antennas Leaky wave antenna (I) It is an antenna which is made of a waveguide (or transmission line) which leaks progressively
More informationMode interference and radiation leakage in a tapered parallel plate waveguide for terahertz waves
Mode interference and radiation leakage in a tapered parallel plate waveguide for terahertz waves R. Mueckstein, M. Navarro-Cía, and O. Mitrofanov Citation: Appl. Phys. Lett. 102, 141103 (2013); doi: 10.1063/1.4800772
More informationTHz Filter Using the Transverse-electric (TE 1 ) Mode of the Parallel-plate Waveguide
Journal of the Optical Society of Korea ol. 13 No. December 9 pp. 3-7 DOI: 1.387/JOSK.9.13..3 THz Filter Using the Transverse-electric (TE 1 ) Mode of the Parallel-plate Waveguide Eui Su Lee and Tae-In
More informationFrequency Tunable Low-Cost Microwave Absorber for EMI/EMC Application
Progress In Electromagnetics Research Letters, Vol. 74, 47 52, 2018 Frequency Tunable Low-Cost Microwave Absorber for EMI/EMC Application Gobinda Sen * and Santanu Das Abstract A frequency tunable multi-layer
More informationArtificial dielectric polarizingbeamsplitter. terahertz region
www.nature.com/scientificreports Received: 10 May 2017 Accepted: 14 June 2017 Published: xx xx xxxx OPEN Artificial dielectric polarizingbeamsplitter and isolator for the terahertz region Rajind Mendis
More informationPropagation of Single-Mode and Multi-Mode Terahertz Radiation Through a Parallel-Plate Waveguide
Journal of the Korean Physical Society, Vol. 53, No. 4, October 2008, pp. 18911896 Propagation of Single-Mode and Multi-Mode Terahertz Radiation Through a Parallel-Plate Waveguide Eui Su Lee, Jin Seok
More informationz t h l g 2009 John Wiley & Sons, Inc. Published 2009 by John Wiley & Sons, Inc.
x w z t h l g Figure 10.1 Photoconductive switch in microstrip transmission-line geometry: (a) top view; (b) side view. Adapted from [579]. Copyright 1983, IEEE. I g G t C g V g V i V r t x u V t Z 0 Z
More informationPrinciples of Optics for Engineers
Principles of Optics for Engineers Uniting historically different approaches by presenting optical analyses as solutions of Maxwell s equations, this unique book enables students and practicing engineers
More information3D radar imaging based on frequency-scanned antenna
LETTER IEICE Electronics Express, Vol.14, No.12, 1 10 3D radar imaging based on frequency-scanned antenna Sun Zhan-shan a), Ren Ke, Chen Qiang, Bai Jia-jun, and Fu Yun-qi College of Electronic Science
More informationImprovement of terahertz imaging with a dynamic subtraction technique
Improvement of terahertz imaging with a dynamic subtraction technique Zhiping Jiang, X. G. Xu, and X.-C. Zhang By use of dynamic subtraction it is feasible to adopt phase-sensitive detection with a CCD
More informationRECTANGULAR SLOT ANTENNA WITH PATCH STUB FOR ULTRA WIDEBAND APPLICATIONS AND PHASED ARRAY SYSTEMS
Progress In Electromagnetics Research, PIER 53, 227 237, 2005 RECTANGULAR SLOT ANTENNA WITH PATCH STUB FOR ULTRA WIDEBAND APPLICATIONS AND PHASED ARRAY SYSTEMS A. A. Eldek, A. Z. Elsherbeni, and C. E.
More informationDielectric Metasurface for Generating Broadband Millimeter Wave Orbital. Angular Momentum Beams
Dielectric Metasurface for Generating Broadband Millimeter Wave Orbital Angular Momentum Beams Fan Bi 1,2, Zhongling Ba 2, Yunting Li 2, and Xiong Wang 2, 1 Shanghai Institute of Microsystem and Information
More informationOpto-VLSI-based reconfigurable photonic RF filter
Research Online ECU Publications 29 Opto-VLSI-based reconfigurable photonic RF filter Feng Xiao Mingya Shen Budi Juswardy Kamal Alameh This article was originally published as: Xiao, F., Shen, M., Juswardy,
More informationDesign of Rotman Lens Antenna at Ku-Band Based on Substrate Integrated Technology
Journal of Communication Engineering, Vol. 3, No.1, Jan.- June 2014 33 Design of Rotman Lens Antenna at Ku-Band Based on Substrate Integrated Technology S. A. R. Hosseini, Z. H. Firouzeh and M. Maddahali
More informationDesign of Substrate-Integrated Waveguide Slot Antenna with AZIM Coating
Design of Substrate-Integrated Waveguide Slot Antenna with Coating Pomal Dhara Anantray 1, Prof. Satish Ramdasji Bhoyar 2 1 Student, Electronics and Telecommunication, Rajiv Gandhi Institute of Technology,
More informationDesign and Development of a 2 1 Array of Slotted Microstrip Line Fed Shorted Patch Antenna for DCS Mobile Communication System
Wireless Engineering and Technology, 2013, 4, 59-63 http://dx.doi.org/10.4236/wet.2013.41009 Published Online January 2013 (http://www.scirp.org/journal/wet) 59 Design and Development of a 2 1 Array of
More informationENHANCEMENT OF PHASED ARRAY SIZE AND RADIATION PROPERTIES USING STAGGERED ARRAY CONFIGURATIONS
Progress In Electromagnetics Research C, Vol. 39, 49 6, 213 ENHANCEMENT OF PHASED ARRAY SIZE AND RADIATION PROPERTIES USING STAGGERED ARRAY CONFIGURATIONS Abdelnasser A. Eldek * Department of Computer
More informationSupplementary Information for. Surface Waves. Angelo Angelini, Elsie Barakat, Peter Munzert, Luca Boarino, Natascia De Leo,
Supplementary Information for Focusing and Extraction of Light mediated by Bloch Surface Waves Angelo Angelini, Elsie Barakat, Peter Munzert, Luca Boarino, Natascia De Leo, Emanuele Enrico, Fabrizio Giorgis,
More informationINTERNATIONAL JOURNAL OF PURE AND APPLIED RESEARCH IN ENGINEERING AND TECHNOLOGY
Prerna Saxena,, 2013; Volume 1(8): 46-53 INTERNATIONAL JOURNAL OF PURE AND APPLIED RESEARCH IN ENGINEERING AND TECHNOLOGY A PATH FOR HORIZING YOUR INNOVATIVE WORK STUDY OF PATCH ANTENNA ARRAY USING SINGLE
More informationResonance-induced wave penetration through electromagnetic opaque object
Resonance-induced wave penetration through electromagnetic opaque object He Wen a,c), Bo Hou b), Yang Leng a), Weijia Wen b,d) a) Department of Mechanical Engineering, the Hong Kong University of Science
More informationDesign and analysis of T shaped broad band micro strip patch antenna for Ku band application
International Refereed Journal of Engineering and Science (IRJES) ISSN (Online) 2319-183X, (Print) 2319-1821 Volume 5, Issue 2 (February 2016), PP.44-49 Design and analysis of T shaped broad band micro
More informationPlane wave excitation by taper array for optical leaky waveguide antenna
LETTER IEICE Electronics Express, Vol.15, No.2, 1 6 Plane wave excitation by taper array for optical leaky waveguide antenna Hiroshi Hashiguchi a), Toshihiko Baba, and Hiroyuki Arai Graduate School of
More informationMultiple wavelength resonant grating filters at oblique incidence with broad angular acceptance
Multiple wavelength resonant grating filters at oblique incidence with broad angular acceptance Andrew B. Greenwell, Sakoolkan Boonruang, M.G. Moharam College of Optics and Photonics - CREOL, University
More informationTRIPLE-BAND OMNI-DIRECTIONAL ANTENNA FOR WLAN APPLICATION
Progress In Electromagnetics Research, PIER 76, 477 484, 2007 TRIPLE-BAND OMNI-DIRECTIONAL ANTENNA FOR WLAN APPLICATION Y.-J. Wu, B.-H. Sun, J.-F. Li, and Q.-Z. Liu National Key Laboratory of Antennas
More informationDESIGN OF WIDEBAND TRIANGLE SLOT ANTENNAS WITH TUNING STUB
Progress In Electromagnetics Research, PIER 48, 233 248, 2004 DESIGN OF WIDEBAND TRIANGLE SLOT ANTENNAS WITH TUNING STUB A. A. Eldek, A. Z. Elsherbeni, and C. E. Smith Department of Electrical Engineering
More informationCIRCULARLY POLARIZED SLOTTED APERTURE ANTENNA WITH COPLANAR WAVEGUIDE FED FOR BROADBAND APPLICATIONS
Journal of Engineering Science and Technology Vol. 11, No. 2 (2016) 267-277 School of Engineering, Taylor s University CIRCULARLY POLARIZED SLOTTED APERTURE ANTENNA WITH COPLANAR WAVEGUIDE FED FOR BROADBAND
More informationIEEE ANTENNAS AND WIRELESS PROPAGATION LETTERS, VOL. 7, /$ IEEE
IEEE ANTENNAS AND WIRELESS PROPAGATION LETTERS, VOL. 7, 2008 369 Design and Development of a Novel Compact Soft-Surface Structure for the Front-to-Back Ratio Improvement and Size Reduction of a Microstrip
More informationDESIGN OF A NOVEL MICROSTRIP-FED DUAL-BAND SLOT ANTENNA FOR WLAN APPLICATIONS
Progress In Electromagnetics Research Letters, Vol. 13, 75 81, 2010 DESIGN OF A NOVEL MICROSTRIP-FED DUAL-BAND SLOT ANTENNA FOR WLAN APPLICATIONS S. Gai, Y.-C. Jiao, Y.-B. Yang, C.-Y. Li, and J.-G. Gong
More informationMicrowave Metamaterial Antennas and Other Applications
Forum for Electromagnetic Research Methods and Application Technologies (FERMAT) Microwave Metamaterial Antennas and Other Applications Tie Jun Cui and Hui Feng Ma State Key Laboratory of Millimeter Waves
More informationDesign and Analysis of Resonant Leaky-mode Broadband Reflectors
846 PIERS Proceedings, Cambridge, USA, July 6, 8 Design and Analysis of Resonant Leaky-mode Broadband Reflectors M. Shokooh-Saremi and R. Magnusson Department of Electrical and Computer Engineering, University
More informationSupplementary Figure 1. GO thin film thickness characterization. The thickness of the prepared GO thin
Supplementary Figure 1. GO thin film thickness characterization. The thickness of the prepared GO thin film is characterized by using an optical profiler (Bruker ContourGT InMotion). Inset: 3D optical
More informationA NOVEL EPSILON NEAR ZERO (ENZ) TUNNELING CIRCUIT USING MICROSTRIP TECHNOLOGY FOR HIGH INTEGRABILITY APPLICATIONS
Progress In Electromagnetics Research C, Vol. 15, 65 74, 2010 A NOVEL EPSILON NEAR ZERO (ENZ) TUNNELING CIRCUIT USING MICROSTRIP TECHNOLOGY FOR HIGH INTEGRABILITY APPLICATIONS D. V. B. Murthy, A. Corona-Chávez
More informationINDUCTIVE TRI-BAND DOUBLE ELEMENT FSS FOR SPACE APPLICATIONS
Progress In Electromagnetics Research C, Vol. 18, 87 101, 2011 INDUCTIVE TRI-BAND DOUBLE ELEMENT FSS FOR SPACE APPLICATIONS D. Ramaccia and A. Toscano Department of Applied Electronics University of Rome
More informationHYBRID ARRAY ANTENNA FOR BROADBAND MILLIMETER-WAVE APPLICATIONS
Progress In Electromagnetics Research, PIER 83, 173 183, 2008 HYBRID ARRAY ANTENNA FOR BROADBAND MILLIMETER-WAVE APPLICATIONS S. Costanzo, I. Venneri, G. Di Massa, and G. Amendola Dipartimento di Elettronica,
More informationDesign and Development of Tapered Slot Vivaldi Antenna for Ultra Wideband Applications
Design and Development of Tapered Slot Vivaldi Antenna for Ultra Wideband Applications D. Madhavi #, A. Sudhakar #2 # Department of Physics, #2 Department of Electronics and Communications Engineering,
More informationElectromagnetic Radiation
Electromagnetic Radiation EMR Light: Interference and Optics I. Light as a Wave - wave basics review - electromagnetic radiation II. Diffraction and Interference - diffraction, Huygen s principle - superposition,
More informationA Compact Miniaturized Frequency Selective Surface with Stable Resonant Frequency
Progress In Electromagnetics Research Letters, Vol. 62, 17 22, 2016 A Compact Miniaturized Frequency Selective Surface with Stable Resonant Frequency Ning Liu 1, *, Xian-Jun Sheng 2, and Jing-Jing Fan
More informationCOUPLED SECTORIAL LOOP ANTENNA (CSLA) FOR ULTRA-WIDEBAND APPLICATIONS *
COUPLED SECTORIAL LOOP ANTENNA (CSLA) FOR ULTRA-WIDEBAND APPLICATIONS * Nader Behdad, and Kamal Sarabandi Department of Electrical Engineering and Computer Science University of Michigan, Ann Arbor, MI,
More informationFundamentals of Electromagnetics With Engineering Applications by Stuart M. Wentworth Copyright 2005 by John Wiley & Sons. All rights reserved.
Figure 7-1 (p. 339) Non-TEM mmode waveguide structures include (a) rectangular waveguide, (b) circular waveguide., (c) dielectric slab waveguide, and (d) fiber optic waveguide. Figure 7-2 (p. 340) Cross
More informationProximity fed gap-coupled half E-shaped microstrip antenna array
Sādhanā Vol. 40, Part 1, February 2015, pp. 75 87. c Indian Academy of Sciences Proximity fed gap-coupled half E-shaped microstrip antenna array AMIT A DESHMUKH 1, and K P RAY 2 1 Department of Electronics
More informationDetermination of Transmission and Reflection Parameters by Analysis of Square Loop Metasurface
Determination of Transmission and Reflection Parameters by Analysis of Square Loop Metasurface Anamika Sethi #1, Rajni *2 #Research Scholar, ECE Department, MRSPTU, INDIA *Associate Professor, ECE Department,
More informationInvestigation of the Near-field Distribution at Novel Nanometric Aperture Laser
Investigation of the Near-field Distribution at Novel Nanometric Aperture Laser Tiejun Xu, Jia Wang, Liqun Sun, Jiying Xu, Qian Tian Presented at the th International Conference on Electronic Materials
More informationRCS Reduction of Patch Array Antenna by Complementary Split-Ring Resonators Structure
Progress In Electromagnetics Research C, Vol. 51, 95 101, 2014 RCS Reduction of Patch Array Antenna by Complementary Split-Ring Resonators Structure Jun Zheng 1, 2, Shaojun Fang 1, Yongtao Jia 3, *, and
More informationSUPPLEMENTARY INFORMATION
Optically reconfigurable metasurfaces and photonic devices based on phase change materials S1: Schematic diagram of the experimental setup. A Ti-Sapphire femtosecond laser (Coherent Chameleon Vision S)
More informationDielectric Leaky-Wave Antenna with Planar Feed Immersed in the Dielectric Substrate
Dielectric Leaky-Wave Antenna with Planar Feed Immersed in the Dielectric Substrate # Takashi Kawamura, Aya Yamamoto, Tasuku Teshirogi, Yuki Kawahara 2 Anritsu Corporation 5-- Onna, Atsugi-shi, Kanagawa,
More informationA Beam Switching Planar Yagi-patch Array for Automotive Applications
PIERS ONLINE, VOL. 6, NO. 4, 21 35 A Beam Switching Planar Yagi-patch Array for Automotive Applications Shao-En Hsu, Wen-Jiao Liao, Wei-Han Lee, and Shih-Hsiung Chang Department of Electrical Engineering,
More informationENHANCEMENT OF PRINTED DIPOLE ANTENNAS CHARACTERISTICS USING SEMI-EBG GROUND PLANE
J. of Electromagn. Waves and Appl., Vol. 2, No. 8, 993 16, 26 ENHANCEMENT OF PRINTED DIPOLE ANTENNAS CHARACTERISTICS USING SEMI-EBG GROUND PLANE F. Yang, V. Demir, D. A. Elsherbeni, and A. Z. Elsherbeni
More informationOPAC 202 Optical Design and Instrumentation. Topic 3 Review Of Geometrical and Wave Optics. Department of
OPAC 202 Optical Design and Instrumentation Topic 3 Review Of Geometrical and Wave Optics Department of http://www.gantep.edu.tr/~bingul/opac202 Optical & Acustical Engineering Gaziantep University Feb
More informationA Millimeter Wave Center-SIW-Fed Antenna For 60 GHz Wireless Communication
A Millimeter Wave Center-SIW-Fed Antenna For 60 GHz Wireless Communication M. Karami, M. Nofersti, M.S. Abrishamian, R.A. Sadeghzadeh Faculty of Electrical and Computer Engineering K. N. Toosi University
More informationPhase-sensitive high-speed THz imaging
Phase-sensitive high-speed THz imaging Toshiaki Hattori, Keisuke Ohta, Rakchanok Rungsawang and Keiji Tukamoto Institute of Applied Physics, University of Tsukuba, 1-1-1 Tennodai, Tsukuba, Ibaraki, 305-8573
More informationPlanar Inverted L (PIL) Patch Antenna for Mobile Communication
International Journal of Electronic and Electrical Engineering. ISSN 0974-2174 Volume 4, Number 1 (2011), pp.117-122 International Research Publication House http://www.irphouse.com Planar Inverted L (PIL)
More informationDesign of Metamaterial Antenna For Wireless Applications
GRD Journals Global Research and Development Journal for Engineering International Conference on Innovations in Engineering and Technology (ICIET) - 2016 July 2016 e-issn: 2455-5703 Design of Metamaterial
More informationA VARACTOR-TUNABLE HIGH IMPEDANCE SURFACE FOR ACTIVE METAMATERIAL ABSORBER
Progress In Electromagnetics Research C, Vol. 43, 247 254, 2013 A VARACTOR-TUNABLE HIGH IMPEDANCE SURFACE FOR ACTIVE METAMATERIAL ABSORBER Bao-Qin Lin *, Shao-Hong Zhao, Qiu-Rong Zheng, Meng Zhu, Fan Li,
More informationCHAPTER 2 MICROSTRIP REFLECTARRAY ANTENNA AND PERFORMANCE EVALUATION
43 CHAPTER 2 MICROSTRIP REFLECTARRAY ANTENNA AND PERFORMANCE EVALUATION 2.1 INTRODUCTION This work begins with design of reflectarrays with conventional patches as unit cells for operation at Ku Band in
More informationBroadband low cross-polarization patch antenna
RADIO SCIENCE, VOL. 42,, doi:10.1029/2006rs003595, 2007 Broadband low cross-polarization patch antenna Yong-Xin Guo, 1 Kah-Wee Khoo, 1 Ling Chuen Ong, 1 and Kwai-Man Luk 2 Received 27 November 2006; revised
More informationWaveguiding in PMMA photonic crystals
ROMANIAN JOURNAL OF INFORMATION SCIENCE AND TECHNOLOGY Volume 12, Number 3, 2009, 308 316 Waveguiding in PMMA photonic crystals Daniela DRAGOMAN 1, Adrian DINESCU 2, Raluca MÜLLER2, Cristian KUSKO 2, Alex.
More informationImaging with terahertz waves
1716 OPTICS LETTERS / Vol. 20, No. 16 / August 15, 1995 Imaging with terahertz waves B. B. Hu and M. C. Nuss AT&T Bell Laboratories, 101 Crawfords Corner Road, Holmdel, New Jersey 07733-3030 Received May
More informationMeasurement of phase velocity dispersion curves and group velocities in a plate using leaky Lamb waves
Measurement of phase velocity dispersion curves and group velocities in a plate using leaky Lamb waves NDE2002 predict. assure. improve. National Seminar of ISNT Chennai, 5. 7. 12. 2002 www.nde2002.org
More informationIdentification of periodic structure target using broadband polarimetry in terahertz radiation
Identification of periodic structure target using broadband polarimetry in terahertz radiation Yuki Kamagata, Hiroaki Nakabayashi a), Koji Suizu, and Keizo Cho Chiba Institute of Technology, Tsudanuma,
More informationCircularly Polarized Post-wall Waveguide Slotted Arrays
Circularly Polarized Post-wall Waveguide Slotted Arrays Hisahiro Kai, 1a) Jiro Hirokawa, 1 and Makoto Ando 1 1 Department of Electrical and Electric Engineering, Tokyo Institute of Technology 2-12-1 Ookayama
More informationPlanar Leaky-Wave Antennas Based on Microstrip Line and Substrate Integrated Waveguide (SIW)
Forum for Electromagnetic Research Methods and Application Technologies (FERMAT) Planar Leaky-Wave Antennas Based on Microstrip Line and Substrate Integrated Waveguide (SIW) Dr. Juhua Liu liujh33@mail.sysu.edu.cn
More informationGEOMETRICAL OPTICS Practical 1. Part I. BASIC ELEMENTS AND METHODS FOR CHARACTERIZATION OF OPTICAL SYSTEMS
GEOMETRICAL OPTICS Practical 1. Part I. BASIC ELEMENTS AND METHODS FOR CHARACTERIZATION OF OPTICAL SYSTEMS Equipment and accessories: an optical bench with a scale, an incandescent lamp, matte, a set of
More informationAnti-reflection Coatings
Spectral Dispersion Spectral resolution defined as R = Low 10-100 Medium 100-1000s High 1000s+ Broadband filters have resolutions of a few (e.g. J-band corresponds to R=4). Anti-reflection Coatings Significant
More informationDesign of Narrow Slotted Rectangular Microstrip Antenna
Original Article Design of Narrow Slotted Rectangular Microstrip Antenna Ashok Kajla and Sunita Gawria* Electronics & Communication Department ARYA Institute of Engineering and Technology, Jaipur, Rajasthan,
More informationA New TEM Horn Antenna Designing Based on Plexiglass Antenna Cap
Journal of Applied Science and Engineering, Vol. 21, No. 3, pp. 413 418 (2018) DOI: 10.6180/jase.201809_21(3).0012 A New TEM Horn Antenna Designing Based on Plexiglass Antenna Cap Lin Teng and Jie Liu*
More informationA Printed Vivaldi Antenna with Improved Radiation Patterns by Using Two Pairs of Eye-Shaped Slots for UWB Applications
Progress In Electromagnetics Research, Vol. 148, 63 71, 2014 A Printed Vivaldi Antenna with Improved Radiation Patterns by Using Two Pairs of Eye-Shaped Slots for UWB Applications Kun Ma, Zhi Qin Zhao
More informationThe Shaped Coverage Area Antenna for Indoor WLAN Access Points
The Shaped Coverage Area Antenna for Indoor WLAN Access Points A.BUMRUNGSUK and P. KRACHODNOK School of Telecommunication Engineering, Institute of Engineering Suranaree University of Technology 111 University
More informationCHARACTERIZATION AND MODELING OF LASER MICRO-MACHINED METALLIC TERAHERTZ WIRE WAVEGUIDES
CHARACTERIZATION AND MODELING OF LASER MICRO-MACHINED METALLIC TERAHERTZ WIRE WAVEGUIDES A dissertation submitted in partial fulfillment of the requirements for the degree of Doctor of Philosophy By SATYA
More informationOPTICS DIVISION B. School/#: Names:
OPTICS DIVISION B School/#: Names: Directions: Fill in your response for each question in the space provided. All questions are worth two points. Multiple Choice (2 points each question) 1. Which of the
More informationSupplementary Figure 1. Effect of the spacer thickness on the resonance properties of the gold and silver metasurface layers.
Supplementary Figure 1. Effect of the spacer thickness on the resonance properties of the gold and silver metasurface layers. Finite-difference time-domain calculations of the optical transmittance through
More informationPRINTED BLUETOOTH AND UWB ANTENNA WITH DUAL BAND-NOTCHED FUNCTIONS
Progress In Electromagnetics Research Letters, Vol. 26, 39 48, 2011 PRINTED BLUETOOTH AND UWB ANTENNA WITH DUAL BAND-NOTCHED FUNCTIONS F.-C. Ren *, F.-S. Zhang, J.-H. Bao, Y.-C. Jiao, and L. Zhou National
More informationTAPERED MEANDER SLOT ANTENNA FOR DUAL BAND PERSONAL WIRELESS COMMUNICATION SYSTEMS
are closer to grazing, where 50. However, once the spectral current distribution is windowed, and the level of the edge singularity is reduced by this process, the computed RCS shows a much better agreement
More informationAntennas and Propagation. Chapter 4: Antenna Types
Antennas and Propagation : Antenna Types 4.4 Aperture Antennas High microwave frequencies Thin wires and dielectrics cause loss Coaxial lines: may have 10dB per meter Waveguides often used instead Aperture
More informationGradually tapered hollow glass waveguides for the transmission of CO 2 laser radiation
Gradually tapered hollow glass waveguides for the transmission of CO 2 laser radiation Daniel J. Gibson and James A. Harrington Hollow glass waveguides with bores tapered from 1000 to 500 m and from 700
More informationA K-Band Flat Transmitarray Antenna with a Planar Microstrip Slot-Fed Patch Antenna Feeder
Progress In Electromagnetics Research C, Vol. 64, 97 104, 2016 A K-Band Flat Transmitarray Antenna with a Planar Microstrip Slot-Fed Patch Antenna Feeder Lv-Wei Chen and Yuehe Ge * Abstract A thin phase-correcting
More informationL-slotted Microstrip Patch Antenna for WiMAX and WLAN Applications
L-slotted Microstrip Patch Antenna for WiMAX and WLAN Applications Danish Hayat Bhagwant University, Ajmer, India Abstract: This paper is based on design and simulation of rectangular Microstrip Patch
More informationDiffractive optical elements for high gain lasers with arbitrary output beam profiles
Diffractive optical elements for high gain lasers with arbitrary output beam profiles Adam J. Caley, Martin J. Thomson 2, Jinsong Liu, Andrew J. Waddie and Mohammad R. Taghizadeh. Heriot-Watt University,
More informationDevelopment of Low Profile Substrate Integrated Waveguide Horn Antenna with Improved Gain
Amirkabir University of Technology (Tehran Polytechnic) Amirkabir International Jounrnal of Science & Research Electrical & Electronics Engineering (AIJ-EEE) Vol. 48, No., Fall 016, pp. 63-70 Development
More informationInstruction manual and data sheet ipca h
1/15 instruction manual ipca-21-05-1000-800-h Instruction manual and data sheet ipca-21-05-1000-800-h Broad area interdigital photoconductive THz antenna with microlens array and hyperhemispherical silicon
More information- reduce cross-polarization levels produced by reflector feeds - produce nearly identical E- and H-plane patterns of feeds
Corrugated Horns Motivation: Contents - reduce cross-polarization levels produced by reflector feeds - produce nearly identical E- and H-plane patterns of feeds 1. General horn antenna applications 2.
More informationLow-Profile Wideband Circularly Polarized Patch Antenna Using Asymmetric Feeding
Progress In Electromagnetics Research Letters, Vol. 48, 21 26, 2014 Low-Profile Wideband Circularly Polarized Patch Antenna Using Asymmetric Feeding Yang-Tao Wan *, Fu-Shun Zhang, Dan Yu, Wen-Feng Chen,
More informationRectangular Patch Antenna Using ARRAY OF HEXAGONAL RINGS Structure in L-band
Rectangular Patch Antenna Using ARRAY OF HEXAGONAL RINGS Structure in L-band Anamika Verma, Dr.Sarita Singh Bhadauria Department of Electronics Engineering, Madhav Institute of Technology and Science,
More informationRECENTLY, using near-field scanning optical
1 2 1 2 Theoretical and Experimental Study of Near-Field Beam Properties of High Power Laser Diodes W. D. Herzog, G. Ulu, B. B. Goldberg, and G. H. Vander Rhodes, M. S. Ünlü L. Brovelli, C. Harder Abstract
More informationMonitoring the plant water status with terahertz waves
Monitoring the plant water status with terahertz waves Dr. Gunter Urbasch Experimental Semiconductor Physics AG Martin Koch Fachbereich Physik Experimentelle Halbleiterphysik Arbeitsgruppe M. Koch Gunter
More informationSusceptibility of an Electromagnetic Band-gap Filter
1 Susceptibility of an Electromagnetic Band-gap Filter Shao Ying Huang, Student Member, IEEE and Yee Hui Lee, Member, IEEE, Abstract In a compact dual planar electromagnetic band-gap (EBG) microstrip structure,
More informationResearch Article Analysis and Design of Leaky-Wave Antenna with Low SLL Based on Half-Mode SIW Structure
Antennas and Propagation Volume 215, Article ID 57693, 5 pages http://dx.doi.org/1.1155/215/57693 Research Article Analysis and Design of Leaky-Wave Antenna with Low SLL Based on Half-Mode SIW Structure
More informationNarrowing spectral width of green LED by GMR structure to expand color mixing field
Narrowing spectral width of green LED by GMR structure to expand color mixing field S. H. Tu 1, Y. C. Lee 2, C. L. Hsu 1, W. P. Lin 1, M. L. Wu 1, T. S. Yang 1, J. Y. Chang 1 1. Department of Optical and
More informationMicrostrip Antenna Using Dummy EBG
www.ijsrnsc.org Available online at www.ijsrnsc.org IJSRNSC Volume-1, Issue-2, June- 2013 Research Paper Int. J. Sci. Res. in Network Security and Communication ISSN: 2321-3256 Microstrip Antenna Using
More informationDesign of Z-Shape Microstrip Antenna with I- Slot for Wi-Max/Satellite Application
Journal of Communication and Computer 13 (2016) 261-265 doi:10.17265/1548-7709/2016.05.006 D DAVID PUBLISHING Design of Z-Shape Microstrip Antenna with I- Slot for Wi-Max/Satellite Application Swarnaprava
More informationDesign, Fabrication and Characterization of Very Small Aperture Lasers
372 Progress In Electromagnetics Research Symposium 2005, Hangzhou, China, August 22-26 Design, Fabrication and Characterization of Very Small Aperture Lasers Jiying Xu, Jia Wang, and Qian Tian Tsinghua
More informationEffects of Two Dimensional Electromagnetic Bandgap (EBG) Structures on the Performance of Microstrip Patch Antenna Arrays
Effects of Two Dimensional Electromagnetic Bandgap (EBG) Structures on the Performance of Microstrip Patch Antenna Arrays Mr. F. Benikhlef 1 and Mr. N. Boukli-Hacen 2 1 Research Scholar, telecommunication,
More informationCONTROLLED RADIATION FROM DIELECTRIC SLABS OVER SPOOF SURFACE PLASMON WAVEGUIDES
Progress In Electromagnetics Research, Vol. 140, 169 179, 2013 CONTROLLED RADIATION FROM DIELECTRIC SLABS OVER SPOOF SURFACE PLASMON WAVEGUIDES Oscar Quevedo-Teruel * Department of Electronic Engineering
More informationDesign and Demonstration of 1-bit and 2-bit Transmit-arrays at X-band Frequencies
PIERS ONLINE, VOL. 5, NO. 8, 29 731 Design and Demonstration of 1-bit and 2-bit Transmit-arrays at X-band Frequencies H. Kaouach 1, L. Dussopt 1, R. Sauleau 2, and Th. Koleck 3 1 CEA, LETI, MINATEC, F3854
More informationDesign of Low-Index Metamaterial Lens Used for Wideband Circular Polarization Antenna
Progress In Electromagnetics Research Letters, Vol. 68, 93 98, 2017 Design of Low-Index Metamaterial Lens Used for Wideband Circular Polarization Antenna Yong Wang and Yanlin Zou * Abstract A novel low-index
More informationBroadband Circular Polarized Antenna Loaded with AMC Structure
Progress In Electromagnetics Research Letters, Vol. 76, 113 119, 2018 Broadband Circular Polarized Antenna Loaded with AMC Structure Yi Ren, Xiaofei Guo *,andchaoyili Abstract In this paper, a novel broadband
More information