Design of Tri-frequency Mode Transducer
|
|
- Miranda Lamb
- 6 years ago
- Views:
Transcription
1 78 Design of Tri-frequency Mode Transducer V. K. Singh, S. B. Chakrabarty Microwave Sensors Antenna Division, Antenna Systems Area, Space Applications Centre, Indian Space Research Organization, Ahmedabad-3815, India, s: S. B. Sharma Antenna Systems Area, Space Applications Centre, Indian Space Research Organization, Ahmedabad- 3815,India, Abstract This paper presents the design, modal analysis and measured results of a mode transducer operating at three frequency bands at 18.7, 23.8 and 36.5 GHz. In this device, cascaded circular waveguides excited by rectangular waveguides through co-axial line fed probes have been used. Mechanisms of cascading of waveguides have been investigated in order to achieve the intended performance at all the three frequency bands. The simulated results of the trifrequency mode transducer are compared with the measured results. Index Terms Circular waveguide, Mode transducer, Probe coupling. I. INTRODUCTION The multi-frequency mode transducers (MTs) and feeds covering more than two bands of frequencies are widely used in antennas for radiometers [1], [2], earth stations and satellite communication payloads. The literature in [3]-[6] elaborates on the design of single frequency mode transducer including the bandwidth enhancement techniques. There are very few literatures on the MTs operating at more than two frequency bands. A tri-frequency corrugated feed with groove discontinuity at input is presented in [7]. This paper [7] did not include the design details of the mode transducer. A work on four-frequency ortho-mode transducer is reported in [8] by the present authors. In this paper, although the approach of design is similar to [8], the frequency bands are taken different than the frequency bands of [8]. A different frequency at Ka-band frequency is taken in the present design to investigate the effects of the discontinuities of the lower frequency mode transducers. Since, the effect of discontinuities is envisaged to be more stringent at the highest frequency at Ka band (36.5 GHz in this design), it is worthwhile to investigate the modal behavior at the highest frequency in the presence of lower frequency ports and to arrive at an optimum design which yields optimum performance at all the frequency bands. The prime objective in the design of a multifrequency MT is to achieve frequency isolation, polarization isolation and purity of dominant mode at the output of MT at each frequency band as mentioned in [8] and [9]. Multi-frequency MTs can be realized by cascading circular waveguide sections and probe coupling mechanisms at individual frequency bands. As a result of cascading, discontinuities in the form of multiple probes or posts [9] and waveguide junctions, excite undesired higher-order modes and deteriorate the performance of the multi-frequency MT. These discontinuities need to be modeled and investigated in order to analyze
2 79 higher-order mode scattering properties, which is prerequisite to the design and realization of multifrequency MTs. In this paper, a mode transducer operating at three widely separated frequency bands is presented. Various configurations having different relative positions of power coupling ports are studied in terms of return loss, power distribution in various modes, isolation of orthogonal ports and isolation of polarization matched ports. A configuration of the MT yielding optimum result is fabricated and measured for its electrical performance. The design steps, configuration, simulation and measured results are presented. II. DESIGN The design complexity of mode transducers working at multiple frequency bands increases due to the presence of multiple discontinuities (symmetrical and asymmetrical) in the path of propagating signals at different frequency bands. A suitable method to design such transducers would be to cascade the mode transducers at individual frequency bands such that the cross-sectional dimensions at higher frequency bands are at cutoff for the lower frequency bands. But, the waveguide sections at lower frequency bands (supporting only the dominant mode) become over-sized at higher frequencies and support higher-order modes, which are excited because of structural discontinuities. The polarization matched power sensing mechanisms have to be used in the cascaded sections for multifrequency operation. In this case, the higher frequency dominant mode signal gets coupled to the lower frequency power sensing ports thereby increasing the insertion loss of the device. In such mode transducers probes, which sense power at lower frequency, band acts as a radial discontinuity and coupler for higher frequency signal. Since, the design goal is to ensure dominant mode purity at each frequency band, the higher-order modes have to be suppressed and all the frequency ports have to be decoupled. The dominant mode purity at each frequency band of MT will ensure the desired radiation patterns of a corrugated horn antenna if fed with such mode transducers. Hence, it is worthwhile to estimate the modal amplitude of different higher-order modes generated because of the discontinuities. Finite element method (FEM) based Ansoft s HFSS software has been used for modeling, analysis, design-optimization and estimation of amplitudes of different higher-order modes. In the MT design, the selected frequencies correspond to the frequencies of a radiometer. The present design is presented at 18.7 ±.2 GHz, 23.8 ±.3 GHz and 36.5 ±.5 GHz. The requirement is of single linear polarization at these three frequency bands. Since, the effect of discontinuities is envisaged to be more stringent at the highest frequency of 36.5 GHz, it is worthwhile to investigate the modal behavior at the highest frequency in the presence of lower frequency ports and to arrive at an optimum design which yields optimum performance at all the frequency bands. The present design of the tri-frequency common mode transducer is based on the coupling from primary cascaded circular waveguide sections to output rectangular waveguides WR-42 ( 1.66 mm
3 8 X 4.32 mm ) for 18.7 and 23.8 GHz and WR-28 ( 7.2 mm X 3.6 mm ) for 36.5 GHz. The diameters of straight circular waveguide sections are chosen as 5.4, 8.1, 1.1 mm for the propagation of dominant TE 11 mode at 36.5, 23.8 and 18.7 GHz, respectively. The lengths of the straight circular waveguide sections have been selected as 33.5, 45 and 27 mm at 36.5, 23.8 and 18.7 GHz, respectively. The higher-order propagating modes supported at the outermost waveguide section are TM 1, TE 21, TE 1, TM 11 at 36.5 GHz and TM 1 at 23.8 GHz, respectively. There are no higher order modes supported at 18.7 GHz. The taper angle and length of the tapered sections between straight waveguide sections(main arm) are optimized in order to minimize the power in the higher-order modes and maximize the power in the desired dominant TE 11 mode. The optimum flare angles for the tapered sections of the geometry have been kept within 5 degree. It is found that in the absence of side coupled rectangular waveguide arms the power coupling in higher-order modes is negligible and 99 % (.44 db) power is confined in the desired TE 11 mode in the outermost circular waveguide section at all the three frequency bands. The radiation patterns have been computed at 36.5 GHz with pure TE 11 mode at the aperture of the mode transducer. The co-polar radiation patterns have 5 degree amplitude taper of db and -8.5 db in the E- and H-planes respectively. The cross-polar radiation level in the diagonal palne(45-degree plane) with respect to the co-polar peak is of the order of -2 db. These co- and cross-polar radiation patterns are shown in Figure 1.. Also, the reflected power in the axial direction of cascaded circular waveguides is -23 db at 18.7 GHz, -27 db at 23.8 GHz and -29 db at 36.5 GHz. The power coupling and return loss deteriorates if probe coupled, side rectangular waveguide arms are introduced. -5 H-plane Co-pol. E-plane Co-pol. Diagonal Plane Cross pol. -15 Power (db) Theta (Degree) Figure 1. Radiation pattern at 36.5 GHz with maximum power in the TE 11 mode, i.e., without higher-order modes. In the present design of tri-frequency mode transducer, the main arm circular waveguide is coupled to rectangular waveguide through coaxial probes. The impedance seen by these probes in circular waveguide is matched to rectangular waveguides using multistepped transitions in the rectangular waveguide as shown in Figure 2.. This transition consists of two parts- a rectangular-to-ridged
4 81 waveguide transition and a ridged waveguide-to-coaxial transformer. For making compact design the stepped ridge transformer has been designed to follow a cosine profile for impedance. Cosine profile offers impedance matching with a very compact design of the transition. Three cases with different orientations of the rectangular waveguide ports have been studied for the design of the tri-frequency mode transducer, which are discussed in order in thefollowing section. Case 1: The configuration for case-1 is shown in Figure 2.(a). The performance is simulated at 36.5 GHz in the presence of mode transducers at 23.8 GHz and 18.7 GHz. Here, all ports at 18.7, 23.7 and 36.5 GHz are aligned, i.e., polarization matched. In this case, the return loss at 36.5 GHz, is db. The signal at 36.5 GHz is isolated from the 23.8 GHz port by db and from 18.7 GHz port by db. From the data presented in Table 1., it is clear that more power couples in the higherorder modes at the aperture at 36.5 GHz. Due to polarization matching of coaxial probes and closeness of frequencies, the signal at 23.8 GHz is poorly isolated from 18.7 GHz. This isolation is of the order of -11 db only. In the presence of coaxial probe discontinuities and hence higher-order modes, the computed cross-polar radiation from the outermost aperture of cascaded circular waveguides is of the order of db, as compared to -2 db for pure TE 11 mode(without higherorder modes) at 36.5 GHz. The co-polar radiation patterns have 5 degree amplitude taper of -11. db and -7.9 db in the E- and H-planes respectively at 36.5 GHz. Case 2: The configuration for case-2 is shown in Figure 2.(b). The performance is simulated at 36.5 GHz in the presence of mode transducers at 23.8 GHz and 18.7 GHz. Here, ports at 18.7, 23.7 are aligned and orthogonal to 36.5 GHz. In this case return loss at 36.5 GHz is 11.4 db. The signal at 36.5 GHz is isolated from the 23.8 GHz port by 7.98 db and from 18.7 GHz port by db. The Table 1. shows that more power couples in the higher-order modes at the aperture at 36.5 GHz. In this case also, the signal at 23.8 GHz is poorly isolated (-11 db) from 18.7 GHz. In this configuration, the computed cross-polar radiation from the outermost aperture of cascaded circular waveguides is of the order of db at 36.5 GHz in the presence of coaxial probe discontinuities. The co-polar radiation patterns have 5 degree amplitude taper of db and.1 db in the E- and H-planes respectively at 36.5 GHz. Case 3: The configuration is shown in Figure 2.(c). The performance is simulated at 36.5 GHz in the presence of mode transducer at 23.8 GHz and 18.7 GHz. Here, ports at 36.5, 23.7 are aligned and orthogonal to 18.7 GHz as shown in Figure 2. (c). In this case return loss at 36.5 GHz is db. The signal at 36.5 GHz is isolated from the 23.8 GHz port by db and from 18.7 GHz port by db. The Table 1., shows that maximum power (-1.15 db) couples in the dominant TE 11 mode and minimum power couples in the higher order modes at the aperture at 36.5 GHz in the presence of
5 82 all the ports. In this configuration (see Figure 2.(c)), the computed cross-polar radiation from the outermost aperture of cascaded circular waveguide is of the order of db. Poor cross-polar radiation is the result of the higher order modes generation due to the coaxial probe discontinuities at 36.5 GHz. The co-polar radiation patterns of the mode transducer have 5 degree amplitude taper of db and -7.7 db in the E- and H-planes respectively at 36.5 GHz, as shown in Figure 3.. The configuration (see Figure 2.(c)) gives the optimum performance at all the frequencies and it has been considered as final design configuration. The modal analysis (see Table-1) results for this configuration show that the return loss at 23.8 GHz is and the isolation of 23.8 GHz signal with 18.7 GHz is db. At 23.8 GHz, maximum power couples in the TE 11 mode, which is of the order of.95 db. At 18.7 GHz also, the maximum power is in the desired TE 11 mode, since 18.7 GHz circular waveguide section does not support higher-order modes at 18.7 GHz. Simulated and measured performance of the cascaded mode transducer (see Figure 2.(c)) operating at all the three frequency bands is given in the next section. III SIMULATED AND MEASURED RESULTS The measured and simulated performance of the combined three-frequency mode transducer (see Figure 2. (c)), which gave optimum performance in terms of return loss, isolation and higher-order mode coupling have been found out. The results are compared with the performance at individual mode transducers. Figures 4., 5. and 6., show the return loss performance at 18.7, 23.8 and 36.5 GHz. The performance at 23.8 GHz frequency band is slightly affected due to the presence of 18.7 GHz port in front of 23.8 GHz port as compared to the performance of individual mode transducer at 23.8 GHz. Figure 2. Different configuration to combine waveguide sections at 3 frequencies.
6 83 The performance at 36.5 GHz is more affected by the presence of two lower frequency ports at 18.7 GHz and 23.8 GHz in front of the 36.5 GHz port. Measured isolation of 36.5 GHz signal with 23.8 GHz port is of the order of 2 db over 8 percent of the desired frequency band and the isolation with 18.7 GHz port is of the order of 25 db as shown in Figure 7.. The measured isolation of 23.8 GHz signal with 18.7 GHz port is of the order of 5 db as shown in Figure 8.. TABLE I. MODES AT THE APERTURE OF THE CASCADED MODE TRANSDUCER AT 36.5 GHZ. Mode names TE 11 TM 1 TE 21 TE 1 TM 11 Modal Amplitude (db) for Fig.2. a Modal Amplitude (db) for Fig.2. b Modal Amplitude (db) for Fig.2. c H-plane Co-pol. E-plane Co-pol. Diagonal Plane Cross pol. -15 Power (db) Theta (Degree) Figure 3. Radiation pattern at 36.5 GHz with power in dominant TE 11 mode and the higher-order modes. Figure 4. Simulated and measured return loss at 18.7 GHz.
7 84 Return Loss(dB) Simulated ( with 18.7 and 36.5 GHz ports) Simulated (without 18.7 and 36.5 GHz ports) Measured (without 18.7 and 36.5 GHz ports) Measured (with 18.7 and 36.5 GHz ports ) Frequency(GHz) Figure 5. Simulated and measured return loss at 23.8 GHz. Return Loss(dB) Simulated (without 18.7 and 23.8 GHz ports) Measured (without 18.7 and 23.8 GHz ports) Measured (with 18.7 and 23.8 GHz ports ) Simulated (with 18.7 and 23.8 GHz ports) Frequency(GHz) Figure 6. Simulated and measured return loss at 36.5 GHz Isolation(dB) Simulated (isolation with 18.7 GHz port) Measured (isolation with 18.7 GHz port) Measured (isolation with 23.8 GHz port) Simulated (isolation with 23.8 GHz port) Frequency(dB) Figure 7. Measured and simulated isolation performance of 36.5 GHz signal with 18.7 and 23.8 GHz ports Isolation(dB) Simulated Measured Frequency(GHz) Figure 8. Measured and simulated isolation performance of 23.8 GHz signal with 18.7 GHz port.
8 GHz mode transducer 23.8 GHz mode transducer 18.7 GHz mode transducer Figure 9. Tri-frequency mode transducer at 18.7, 23.8 and 36.5 GHz. The photograph of the tri-frequency mode transducer is shown in Figure 9.. IV CONCLUSION A novel design of three-frequency band mode transducer has been presented to develop a mode transducer at 18.7, 23.8 and 36.5 GHz. In the multi-frequency environment, the methods of cascading the mode transducers at different frequency bands to yield minimum power in the higher-order modes were investigated. Modal analysis was performed to estimate the effects of taper and asymmetrical probe discontinuities in the main waveguide particularly at the higher frequency band in the presence of lower frequency mode transducers. An optimum configuration of multi-frequency mode transducer yielding desired the isolation of orthogonal ports, isolation of higher frequencies with lower frequency ports of same polarization and maximum power in the dominant TE 11 mode has been obtained. The simulation and measured results were presented for the optimum design of mode transducer. The slight deviation of the measured data from simulated data may be attributed to fabrication tolerances and minor assembly and alignment errors. The modal analysis based design approach presented in this paper may be applied to the design of multi-frequency mode transducers at other frequency bands. ACKNOWLEDGMENT The authors thank Dr. R. R. Navalgund, Director SAC, Ahmedabad for encouragement and support. The authors thank the Engineers of Microwave Sensors Antenna Division, Antenna Systems Area, SAC, Ahmedabad for extending the help and the necessary support. REFERENCES [ 1 ] E. G. Njoku, J. M. Stacey, and F. T. Barath, The Sea-Sat scanning multi-channel microwave radiometer (SMMR): Instrument description and performance, IEEE Journal of Oceanic Engineering, vol. 5, pp , 198.
9 86 [ 2 ] Shashi Bhushan Sharma, Antenna system for the multi-frequency scanning microwave radiometer: MSMR, IEEE Antennas Propagat. Magazine, vol. 42, no. 3, pp , June 2. [ 3 ] G. L. Ragan, Microwave Transmission Circuit. MIT Radiation Laboratory Series, New York: Dover, 1965, New York: McGraw-Hill, 1948, sections 6.17, 6.18, pp. 11, [ 4 ] A. F. Harvey, Microwave Engineering. New York: Academic, 1963, sections 3.6, pp. 11, 157, , , 89, [ 5 ] R. D. Tompkins, A broad-band dual-mode circular waveguide transducer, IRE Trans. Trans. Microwave Theory Tech., pp , July [ 6 ] A. M. Boifot, Classification of ortho-mode transducers, European Trans. Telecommunications and Related Technologies, vol. 2, no.5, pp , [ 7 ] S.B. Sharma and V. K. Singh, Multifrequency corrugated feed with groove discontinuity at input, Electron. Lett., vol. 37, no. 18, pp , Aug. 21. [ 8 ] S. B. Sharma, V. K. Singh, and S B Chakrabarty, Multi-frequency waveguide orthomode transducer, IEEE Trans. Microwave Theory Tech., vol. MTT-53, no. 8, pp , Aug. 25. [ 9 ] S. B. Sharma, Vijay Kumar Singh, Ranajit Dey, and S.B. Chakrabarty, Analysis of post discontinuity in an oversized circular waveguide, IEEE Trans. Microwave Theory Tech., vol. 57, no. 8, pp , Aug. 29.
REMOVAL OF BEAM SQUINTING EFFECTS IN A CIRCULARLY POLARIZED OFFSET PARABOLIC REFLECTOR ANTENNA USING A MATCHED FEED
Progress In Electromagnetics Research Letters, Vol. 7, 105 114, 2009 REMOVAL OF BEAM SQUINTING EFFECTS IN A CIRCULARLY POLARIZED OFFSET PARABOLIC REFLECTOR ANTENNA USING A MATCHED FEED S. B. Sharma Antenna
More informationCOMPACT AND HIGH PERFORMANCE STEPPED TRUNCATED-CIRCULAR WAVEGUIDE BRANCHING ORTHO-MODE TRANSDUCER (STCWB-OMT)
Progress In Electromagnetics Research Letters, Vol. 25, 135 141, 2011 COMPACT AND HIGH PERFORMANCE STEPPED TRUNCATED-CIRCULAR WAVEGUIDE BRANCHING ORTHO-MODE TRANSDUCER (STCWB-OMT) R. C. Gupta *, K. K.
More informationA DUAL-PORTED, DUAL-POLARIZED SPHERICAL NEAR-FIELD PROBE
A DUAL-PORTED, DUAL-POLARIZED SPHERICAL NEAR-FIELD PROBE by J. R. Jones and D. P. Hardin Scientific-Atlanta, Inc. Spherical near-field testing of antennas requires the acquisition of a great volume of
More informationA DUAL-PORTED PROBE FOR PLANAR NEAR-FIELD MEASUREMENTS
A DUAL-PORTED PROBE FOR PLANAR NEAR-FIELD MEASUREMENTS W. Keith Dishman, Doren W. Hess, and A. Renee Koster ABSTRACT A dual-linearly polarized probe developed for use in planar near-field antenna measurements
More informationMicrostrip Antennas Integrated with Horn Antennas
53 Microstrip Antennas Integrated with Horn Antennas Girish Kumar *1, K. P. Ray 2 and Amit A. Deshmukh 1 1. Department of Electrical Engineering, I.I.T. Bombay, Powai, Mumbai 400 076, India Phone: 91 22
More informationDesign and realization of tracking feed antenna system
Design and realization of tracking feed antenna system S. H. Mohseni Armaki 1, F. Hojat Kashani 1, J. R. Mohassel 2, and M. Naser-Moghadasi 3a) 1 Electrical engineering faculty, Iran University of science
More informationUniversity, 50 Nanyang Avenue, Singapore , Singapore. Industrial Road, ST Electronics Paya Lebar Building, Singapore , Singapore
Progress In Electromagnetics Research Letters, Vol. 27, 1 8, 211 DUAL-BAND ORTHO-MODE TRANSDUCER WITH IRREGULARLY SHAPED DIAPHRAGM Y. Tao 1, Z. Shen 1, *, and G. Liu 2 1 School of Electrical and Electronic
More informationRESEARCH AND DESIGN OF QUADRUPLE-RIDGED HORN ANTENNA. of Aeronautics and Astronautics, Nanjing , China
Progress In Electromagnetics Research Letters, Vol. 37, 21 28, 2013 RESEARCH AND DESIGN OF QUADRUPLE-RIDGED HORN ANTENNA Jianhua Liu 1, Yonggang Zhou 1, 2, *, and Jun Zhu 1 1 College of Electronic and
More informationessential requirements is to achieve very high cross-polarization discrimination over a
INTRODUCTION CHAPTER-1 1.1 BACKGROUND The antennas used for specific applications in satellite communications, remote sensing, radar and radio astronomy have several special requirements. One of the essential
More informationNATIONAL RADIO ASTRONOMY OBSERVATORY Socorro, NM ELECTRONICS DIVISION TECHNICAL NOTE NO. 217
NATIONAL RADIO ASTRONOMY OBSERVATORY Socorro, NM ELECTRONICS DIVISION TECHNICAL NOTE NO. 217 Preliminary Measured Results of a Diagonal Quadruple-Ridged Ku-Band OMT Gordon Courts November 29,2010 Preliminary
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 informationANALYSIS OF ELECTRICALLY SMALL SIZE CONICAL ANTENNAS. Y. K. Yu and J. Li Temasek Laboratories National University of Singapore Singapore
Progress In Electromagnetics Research Letters, Vol. 1, 85 92, 2008 ANALYSIS OF ELECTRICALLY SMALL SIZE CONICAL ANTENNAS Y. K. Yu and J. Li Temasek Laboratories National University of Singapore Singapore
More informationHigh Performance Broadband Polarizer for KA Band Applications
Indian Journal of Science and Technology, Vol 8(19), DOI: 10.17485/ijst/2015/v8i19/76225, August 2015 ISSN (Print) : 0974-6846 ISSN (Online) : 0974-5645 High Performance Broadband Polarizer for KA Band
More informationCross Polarization Reduction of Circularly Polarized Microstrip Antenna with SRR
I J C T A, 10(9), 2017, pp. 613-618 International Science Press ISSN: 0974-5572 Cross Polarization Reduction of Circularly Polarized Microstrip Antenna with SRR R. Manikandan* and P.K. Jawahar* ABSTRACT
More informationDOUBLE-RIDGED ANTENNA FOR WIDEBAND APPLI- CATIONS. A. R. Mallahzadeh and A. Imani Electrical Engineering Department Shahed University Tehran, Iran
Progress In Electromagnetics Research, PIER 91, 273 285, 2009 DOUBLE-RIDGED ANTENNA FOR WIDEBAND APPLI- CATIONS A. R. Mallahzadeh and A. Imani Electrical Engineering Department Shahed University Tehran,
More informationA HIGH-POWER LOW-LOSS MULTIPORT RADIAL WAVEGUIDE POWER DIVIDER
Progress In Electromagnetics Research Letters, Vol. 31, 189 198, 2012 A HIGH-POWER LOW-LOSS MULTIPORT RADIAL WAVEGUIDE POWER DIVIDER X.-Q. Li *, Q.-X. Liu, and J.-Q. Zhang School of Physical Science and
More informationA Turnstile Junction Waveguide Orthomode Transducer for the 1 mm Band
A Turnstile Junction Waveguide Orthomode Transducer for the 1 mm Band Alessandro Navarrini, Richard L. Plambeck, and Daning Chow Abstract We describe the design and construction of a waveguide orthomode
More informationNATIONAL RADIO ASTRONOMY OBSERVATORY Socorro, NM ELECTRONICS DIVISION TECHNICAL NOTE NO. 217
NATIONAL RADIO ASTRONOMY OBSERVATORY Socorro, NM ELECTRONICS DIVISION TECHNICAL NOTE NO. 217 Preliminary Measured Results of a Diagonal Quadruple-Ridged Ku-Band OMT Gordon Coutts November 29, 21 Preliminary
More informationPRIME FOCUS FEEDS FOR THE COMPACT RANGE
PRIME FOCUS FEEDS FOR THE COMPACT RANGE John R. Jones Prime focus fed paraboloidal reflector compact ranges are used to provide plane wave illumination indoors at small range lengths for antenna and radar
More informationTRANSMITTING ANTENNA WITH DUAL CIRCULAR POLARISATION FOR INDOOR ANTENNA MEASUREMENT RANGE
TRANSMITTING ANTENNA WITH DUAL CIRCULAR POLARISATION FOR INDOOR ANTENNA MEASUREMENT RANGE Michal Mrnka, Jan Vélim Doctoral Degree Programme (2), FEEC BUT E-mail: xmrnka01@stud.feec.vutbr.cz, velim@phd.feec.vutbr.cz
More informationDesign of Wideband Quad-Ridged Waveguide Orthomode Transducer at L-Band
Progress In Electromagnetics Research C, Vol. 72, 115 122, 217 Design of Wideband Quad-Ridged Waveguide Orthomode Transducer at L-Band Jin Fan 1, 2, 3, *,YihuaYan 3, 4, Chengjin Jin 1, 2,DezhiZhan 1, 2,
More informationNovel Dual-Band Single Circular Polarization Antenna Feeding Network for Satellite Communications
Novel Dual-Band Single Circular Antenna Feeding Network for Satellite Communications Carlos A. Leal-Sevillano, Jorge A. Ruiz-Cruz, José R. Montejo-Garai, Jesús M. Rebollar Abstract In this paper a novel
More informationDual Polarized Near Field Probe Based on OMJ in Waveguide Technology Achieving More Than Octave Bandwidth
Dual Polarized Near Field Probe Based on OMJ in Waveguide Technology Achieving More Than Octave Bandwidth L.J. Foged, A. Giacomini, R. Morbidini, V. Schirosi MICROWAVE VISION ITALY Via Castelli Romani,
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 informationA Dual Band Orthomode Transducer in K/Ka Bands for Satellite Communications Applications
Progress In Electromagnetics Research Letters, Vol. 73, 77 82, 2018 A Dual Band Orthomode Transducer in K/Ka Bands for Satellite Communications Applications Abdellah El Kamili 1, *, Abdelwahed Tribak 1,
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 informationCOMPARATIVE ANALYSIS BETWEEN CONICAL AND GAUSSIAN PROFILED HORN ANTENNAS
Progress In Electromagnetics Research, PIER 38, 147 166, 22 COMPARATIVE ANALYSIS BETWEEN CONICAL AND GAUSSIAN PROFILED HORN ANTENNAS A. A. Kishk and C.-S. Lim Department of Electrical Engineering The University
More informationDesign of a Novel Compact Cup Feed for Parabolic Reflector Antennas
Progress In Electromagnetics Research Letters, Vol. 64, 81 86, 2016 Design of a Novel Compact Cup Feed for Parabolic Reflector Antennas Amir Moallemizadeh 1,R.Saraf-Shirazi 2, and Mohammad Bod 2, * Abstract
More informationBandwidth Enhancement Techniques of Dielectric Resonator Antenna
Bandwidth Enhancement Techniques of Dielectric Resonator Antenna ARCHANA SHARMA Research scholar, Dept. of ECE, MANIT, Bhopal, India Email-er.archna.sharma@gmail.com S.C. SHRIVASTAVA Professor, dept of
More informationA Wideband Waveguide Diplexer for the Extend C-Band Antenna Systems
Progress In Electromagnetics Research C, Vol. 69, 73 82, 2016 A Wideband Waveguide Diplexer for the Extend C-Band Antenna Systems Jin Wang 1, *,BiaoDu 1, 2,YangWu 2, 3, and Ying-Ran He 1 Abstract A wideband
More informationImplementation and Applications of Various Feeding Techniques Using CST Microwave Studio
Implementation and Applications of Various Feeding Techniques Using CST Microwave Studio Dr Sourabh Bisht Graphic Era University sourabh_bisht2002@yahoo. com Ankita Singh Graphic Era University ankitasingh877@gmail.com
More informationULTRA-BROADBAND HIGH EFFICIENCY MODE CON- VERTER
Progress In Electromagnetics Research C, Vol. 36, 145 158, 2013 ULTRA-BROADBAND HIGH EFFICIENCY MODE CON- VERTER Abdelwahed Tribak 1, *, Jamal Zbitou 2, Angel Mediavilla 3, and Naima A. Touhami 4 1 INPT:
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 informationA Compact Dual-Band Dual-Polarized Antenna for Base Station Application
Progress In Electromagnetics Research C, Vol. 64, 61 70, 2016 A Compact Dual-Band Dual-Polarized Antenna for Base Station Application Guanfeng Cui 1, *, Shi-Gang Zhou 2,GangZhao 1, and Shu-Xi Gong 1 Abstract
More informationLAPC 2016 Loughborough UK
Forum for Electromagnetic Research Methods and Application Technologies (FERMAT) Tapered Waveguide Fed Cylindrical Dielectric Resonator Antenna LAPC 2016 Loughborough UK Ms. Jasmine Muhammed, Dr. Parambil
More informationEquivalent Circuit of a Quadraxial Feed for Ultra-Wide Bandwidth Quadruple- Ridged Flared Horn Antennas
Forum for Electromagnetic Research Methods and Application Technologies (FERMAT) Equivalent Circuit of a Quadraxial Feed for Ultra-Wide Bandwidth Quadruple- Ridged Flared Horn Antennas Theunis S. Beukman
More informationNewsletter 5.4. New Antennas. The profiled horns. Antenna Magus Version 5.4 released! May 2015
Newsletter 5.4 May 215 Antenna Magus Version 5.4 released! Version 5.4 sees the release of eleven new antennas (taking the total number of antennas to 277) as well as a number of new features, improvements
More informationA Fan-Shaped Circularly Polarized Patch Antenna for UMTS Band
Progress In Electromagnetics Research C, Vol. 52, 101 107, 2014 A Fan-Shaped Circularly Polarized Patch Antenna for UMTS Band Sumitha Mathew, Ramachandran Anitha, Thazhe K. Roshna, Chakkanattu M. Nijas,
More informationAnalysis and Design of Matched Feeds for Offset Parabolic Reflector Antennas using Analytical and Numerical Techniques.
Analysis and Design of Matched Feeds for Offset Parabolic Reflector Antennas using Analytical and Numerical Techniques A Synopsis report submitted by Rajib Jana (Roll No. 09610210) in partial fulfillment
More informationHigh-Performance Dual-Circularly Polarized Reflector Antenna Feed
High-Performance Dual-Circularly Polarized Reflector Antenna Feed Joo-Young Lim, Jargalsaikhan Nyambayar, Je-Young Yun, Dong-Hyun Kim, Tae-Hyung Kim, Bierng-Chearl Ahn, and Jae-Hoon Bang This paper presents
More informationDevelopment of a Wideband Ortho-Mode Transducer
Development of a Wideband Ortho-Mode Transducer Dirk de Villiers University of Stellenbosch 03 December 2008 Departement Elektriese en Elektroniese Ingenieurswese Department of Electrical and Electronic
More informationCircularly Polarized Square Patch Microstrip Antenna with Y- Shaped Slot for Wi-Max Application
Available online www.ejaet.com European Journal of Advances in Engineering and Technology, 2014, 1(1): 61-68 Research Article Circularly Polarized Square Patch Microstrip Antenna with Y- Shaped Slot for
More informationSEPTUM HORN ANTENNAS AT 47/48 GHz FOR HIGH ALTITUDE PLATFORM STATIONS
SEPTUM HORN ANTENNAS AT 47/48 GHz FOR HIGH ALTITUDE PLATFORM STATIONS Z. Hradecky, P. Pechac, M. Mazanek, R. Galuscak CTU Prague, FEE, Dept. of Electromagnetic Field, Technicka 2, 166 27 Prague, Czech
More informationChapter 5. Array of Star Spirals
Chapter 5. Array of Star Spirals The star spiral was introduced in the previous chapter and it compared well with the circular Archimedean spiral. This chapter will examine the star spiral in an array
More informationAperture Antennas. Reflectors, horns. High Gain Nearly real input impedance. Huygens Principle
Antennas 97 Aperture Antennas Reflectors, horns. High Gain Nearly real input impedance Huygens Principle Each point of a wave front is a secondary source of spherical waves. 97 Antennas 98 Equivalence
More informationDesign of Frequency and Polarization Tunable Microstrip Antenna
Design of Frequency and Polarization Tunable Microstrip Antenna M. S. Nishamol, V. P. Sarin, D. Tony, C. K. Aanandan, P. Mohanan, K. Vasudevan Abstract A novel compact dual frequency microstrip antenna
More informationCOMPACT PLANAR MICROSTRIP CROSSOVER FOR BEAMFORMING NETWORKS
Progress In Electromagnetics Research C, Vol. 33, 123 132, 2012 COMPACT PLANAR MICROSTRIP CROSSOVER FOR BEAMFORMING NETWORKS B. Henin * and A. Abbosh School of ITEE, The University of Queensland, QLD 4072,
More informationDesign of a full-band polariser used in WR-22 standard waveguide for satellite communications
Design of a full-band polariser used in WR-22 standard waveguide for satellite communications Soon-mi Hwang, Kwan-hun Lee Reliability & Failure Analysis Center, Korea Electronics Technology Institute,
More informationPolarization-controllable TE 21 mode converter
REVIEW OF SCIENTIFIC INSTRUMENTS 76, 074703 2005 Polarization-controllable TE 21 mode converter T. H. Chang, C. F. Yu, and C. T. Fan Department of Physics, National Tsing Hua University, Hsinchu, Taiwan
More informationCHAPTER 5 PRINTED FLARED DIPOLE ANTENNA
CHAPTER 5 PRINTED FLARED DIPOLE ANTENNA 5.1 INTRODUCTION This chapter deals with the design of L-band printed dipole antenna (operating frequency of 1060 MHz). A study is carried out to obtain 40 % impedance
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 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 informationBroadband transition between substrate integrated waveguide and rectangular waveguide based on ridged steps
This article has been accepted and published on J-STAGE in advance of copyediting. Content is final as presented. IEICE Electronics Express, Vol.* No.*,*-* Broadband transition between substrate integrated
More informationCIRCULAR polarizers, which play an important role in
IEEE TRANSACTIONS ON MICROWAVE THEORY AND TECHNIQUES, VOL. 52, NO. 7, JULY 2004 1719 A Circular Polarizer Designed With a Dielectric Septum Loading Shih-Wei Wang, Chih-Hung Chien, Chun-Long Wang, and Ruey-Beei
More informationKeywords Cross-polarization, phasing length, return loss, multimode horn
Volume 4, Issue, February 014 ISSN: 18X International Journal of Advanced Research in Computer Science and Software Engineering Research Paper Available online at: www.ijarcsse.com Cross Polarization Reduction
More informationRF Technologies for Space Applications Oscar A. Peverini
SATCOM research activities @ CNR-IEIIT RF Technologies for Space Applications Oscar A. Peverini Introduction Development of radio-frequency antenna-feed systems for satellite applications in the framework
More informationResearch Article A Novel CP Horn Antenna with Switchable Polarization by Single Port Feeding
Antennas and Propagation Volume, Article ID 6, 9 pages http://dx.doi.org/.//6 Research Article A Novel CP Horn Antenna with Switchable Polarization by Single Port Feeding Yangzhen Huang, Junping Geng,
More informationEstimation of the Loss in the ECH Transmission Lines for ITER
Estimation of the Loss in the ECH Transmission Lines for ITER S. T. Han, M. A. Shapiro, J. R. Sirigiri, D. Tax, R. J. Temkin and P. P. Woskov MIT Plasma Science and Fusion Center, MIT Building NW16-186,
More informationThe Effect of Aspect Ratio and Fractal Dimension of the Boundary on the Performance of Fractal Shaped CP Microstrip Antenna
Progress In Electromagnetics Research M, Vol. 64, 23 33, 2018 The Effect of Aspect Ratio and Fractal Dimension of the Boundary on the Performance of Fractal Shaped CP Microstrip Antenna Yagateela P. Rangaiah
More informationChalmers Publication Library
Chalmers Publication Library A Quadraxial Feed for Ultra-Wide Bandwidth Quadruple-Ridged Flared Horn Antennas This document has been downloaded from Chalmers Publication Library (CPL). It is the author
More informationA broadband 180 hybrid ring coupler using a microstrip-to-slotline inverter Riaan Ferreira and Johan Joubert
A broadband 180 hybrid ring coupler using a microstrip-to-slotline inverter Riaan Ferreira and Johan Joubert Centre for Electromagnetism, Department of EEC Engineering, University of Pretoria, Pretoria,
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 informationHIGH ACCURACY CROSS-POLARIZATION MEASUREMENTS USING A SINGLE REFLECTOR COMPACT RANGE
HIGH ACCURACY CROSS-POLARIZATION MEASUREMENTS USING A SINGLE REFLECTOR COMPACT RANGE Christopher A. Rose Microwave Instrumentation Technologies 4500 River Green Parkway, Suite 200 Duluth, GA 30096 Abstract
More informationTechnical Note
3D RECOflO C Technical Note 1967-47 A. Sotiropoulos X-Band Cylindrical Lens Antenna 26 October 1967 Lincoln Laboratory MAS TTS INSTITUTE OF TECHNOLOGY m Lexington, Massachusetts The work reported in.this
More informationDesign of Sectoral Horn Antenna with Low Side Lobe Level (S.L.L)
Volume 117 No. 9 2017, 89-93 ISSN: 1311-8080 (printed version); ISSN: 1314-3395 (on-line version) url: http://www.ijpam.eu doi: 10.12732/ijpam.v117i9.16 ijpam.eu Design of Sectoral Horn Antenna with Low
More informationNational Astronomy and Ionosphere Center Research and Development Laboratory 124 Maple Ave Ithaca, NY TECHNICAL REPORT
National Astronomy and Ionosphere Center Research and Development Laboratory 124 Maple Ave Ithaca, NY 14867 TECHNICAL REPORT April 21, 1999 To: NAIC Staff From: Eugene Lauria Subj: Trap issue in reference
More informationDependence of Antenna Cross-polarization Performance on Waveguide-to-Coaxial Adapter Design
Dependence of Antenna Cross-polarization Performance on Waveguide-to-Coaxial Adapter Design Vince Rodriguez, Edwin Barry, Steve Nichols NSI-MI Technologies Suwanee, GA, USA vrodriguez@nsi-mi.com Abstract
More informationBroadband Balanced Microstrip Antenna Fed by a Waveguide Coupler
278 Broadband Balanced Microstrip Antenna Fed by a Waveguide Coupler R. Gotfrid*, Z. Luvitzky*, H. Matzner* and E. Levine** * HIT, Holon Institute of Technology Department of Communication Engineering,
More informationDual Band Dielectric Resonator Filter (DBDRF) with Defected Ground Structure (DGS)
World Applied Sciences Journal 32 (4): 582-586, 2014 ISSN 1818-4952 IDOSI Publications, 2014 DOI: 10.5829/idosi.wasj.2014.32.04.114 Dual Band Dielectric Resonator Filter (DBDRF) with Defected Ground Structure
More informationA Spiral Antenna with Integrated Parallel-Plane Feeding Structure
Progress In Electromagnetics Research Letters, Vol. 45, 45 50, 2014 A Spiral Antenna with Integrated Parallel-Plane Feeding Structure Huifen Huang and Zonglin Lv * Abstract In practical applications, the
More informationChapter 41 Deep Space Station 13: Venus
Chapter 41 Deep Space Station 13: Venus The Venus site began operation in Goldstone, California, in 1962 as the Deep Space Network (DSN) research and development (R&D) station and is named for its first
More informationAntenna Measurement Uncertainty Method for Measurements in Compact Antenna Test Ranges
Antenna Measurement Uncertainty Method for Measurements in Compact Antenna Test Ranges Stephen Blalock & Jeffrey A. Fordham MI Technologies Suwanee, Georgia, USA Abstract Methods for determining the uncertainty
More informationDUE to their low mass, possible conformity, and simple
IEEE TRANSACTIONS ON ANTENNAS AND PROPAGATION, VOL. 45, NO. 10, OCTOBER 1997 1459 An Experimental Study on 2 2 Sequential-Rotation Arrays with Circularly Polarized Microstrip Radiators Ulrich R. Kraft,
More informationCompact Gap-coupled Microstrip Antennas for Broadband and Dual Frequency Operations
Compact Gap-coupled Microstrip Antennas for Broadband and Dual Frequency Operations 193 K. P. Ray *1, V. Sevani 1 and A. A. Deshmukh 2 1. SAMEER, IIT Campus, Powai, Mumbai 400076, India 2. MPSTME, NMIMS
More informationDesign of Two Ku-Band Orthomode Transducers for Radio Astronomy Applications
Progress In Electromagnetics Research, Vol. 163, 79 87, 2018 Design of Two Ku-Band Orthomode Transducers for Radio Astronomy Applications Renzo Nesti 1, Elia Orsi 2, Giuseppe Pelosi 2, and Stefano Selleri
More informationDESIGN OF LEAKY WAVE ANTENNA WITH COM- POSITE RIGHT-/LEFT-HANDED TRANSMISSION LINE STRUCTURE FOR CIRCULAR POLARIZATION RADIA- TION
Progress In Electromagnetics Research C, Vol. 33, 109 121, 2012 DESIGN OF LEAKY WAVE ANTENNA WITH COM- POSITE RIGHT-/LEFT-HANDED TRANSMISSION LINE STRUCTURE FOR CIRCULAR POLARIZATION RADIA- TION M. Ishii
More informationRadiation Analysis of Phased Antenna Arrays with Differentially Feeding Networks towards Better Directivity
Radiation Analysis of Phased Antenna Arrays with Differentially Feeding Networks towards Better Directivity Manohar R 1, Sophiya Susan S 2 1 PG Student, Department of Telecommunication Engineering, CMR
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 informationA BENT, SHORT-CIRCUITED, METAL-PLATE DIPOLE ANTENNA FOR 2.4-GHZ WLAN OPERATION
Progress In Electromagnetics Research Letters, Vol. 16, 191 197, 2010 A BENT, SHORT-CIRCUITED, METAL-PLATE DIPOLE ANTENNA FOR 2.4-GHZ WLAN OPERATION S.-W. Su and T.-C. Hong Network Access Strategic Business
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 informationTurnstile Junction Orthomode Transducer An option for EVLA X-Band Receiver X-Band OMT Design Review Meeting; AOC, Socorro; October1, 2009
Turnstile Junction Orthomode Transducer An option for EVLA X-Band Receiver X-Band OMT Design Review Meeting; AOC, Socorro; October1, 2009 Sivasankaran Srikanth, Miles Solatka & Michael Meek Scientist/Research
More informationFull-Waveguide Band Orthomode Transducer for the 3 mm and 1 mm Bands. 2 Fabrication and Testing of 3 mm Band OMT
14th International S y mposium on Space Terahertf. Technology Full-Waveguide Band Orthomode Transducer for the 3 mm and 1 mm Bands Gopal Narayanan l, and Neal Erickson Department of Astronomy, University
More informationHigh Power 12-Element Triangular-Grid Rectangular Radial Line Helical Array Antenna
Progress In Electromagnetics Research C, Vol. 55, 17 24, 2014 High Power 12-Element Triangular-Grid Rectangular Radial Line Helical Array Antenna Xiang-Qiang Li *, Qing-Xiang Liu, and Jian-Qiong Zhang
More informationInternational Journal of Engineering Trends and Technology (IJETT) Volume 11 Number 5 - May National Institute of Technology, Warangal, INDIA *
Hexagonal Nonradiating Edge-Coupled Patch Configuration for Bandwidth Enhancement of Patch Antenna Krishn Kant Joshi #1, NVSN Sarma * 2 # Department of Electronics and Communication Engineering National
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 informationA circularly polarized harmonic-rejecting antenna for wireless power transfer applications
LETTER IEICE Electronics Express, Vol.10, No.19, 1 6 A circularly polarized harmonic-rejecting antenna for wireless power transfer applications Omar A. Barrera, Dong Hyun Lee, Nguyen Manh Quyet, Viet Hoang-The,
More informationBroadband Designs of a Triangular Microstrip Antenna with a Capacitive Feed
44 Broadband Designs of a Triangular Microstrip Antenna with a Capacitive Feed Mukesh R. Solanki, Usha Kiran K., and K. J. Vinoy * Microwave Laboratory, ECE Dept., Indian Institute of Science, Bangalore,
More informationA CPW-Fed Dual-Band Slot Antenna with Circular Polarization
Progress In Electromagnetics Research Letters, Vol. 61, 77 83, 2016 A CPW-Fed Dual-Band Slot Antenna with Circular Polarization Yonghao Xin, Quanyuan Feng *,andjuntao Abstract In this paper, a coplanar
More information"(c) 2017 IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other users, including reprinting/
"(c) 17 IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other users, including reprinting/ republishing this material for advertising or promotional purposes,
More informationResearch Article Design and Optimization of a Millimetre Wave Compact Folded Magic-T
Antennas and Propagation Volume 212, Article ID 838962, 6 pages doi:1.1155/212/838962 Research Article Design and Optimization of a Millimetre Wave Compact Folded Magic-T Guang Hua, Jiefu Zhang, Jiudong
More information6464(Print), ISSN (Online) ENGINEERING Volume & 3, Issue TECHNOLOGY 3, October- December (IJECET) (2012), IAEME
International INTERNATIONAL Journal of Electronics JOURNAL and Communication OF ELECTRONICS Engineering AND & Technology COMMUNICATION (IJECET), ISSN 0976 6464(Print), ISSN 0976 6472(Online) ENGINEERING
More informationBroadband Dual Polarized Space-Fed Antenna Arrays with High Isolation
Progress In Electromagnetics Research C, Vol. 55, 105 113, 2014 Broadband Dual Polarized Space-Fed Antenna Arrays with High Isolation Prashant K. Mishra 1, *, Dhananjay R. Jahagirdar 1,andGirishKumar 2
More informationDesign of Compact Logarithmically Periodic Antenna Structures for Polarization-Invariant UWB Communication
Design of Compact Logarithmically Periodic Antenna Structures for Polarization-Invariant UWB Communication Oliver Klemp a, Hermann Eul a Department of High Frequency Technology and Radio Systems, Hannover,
More informationFULL-WAVE ANALYSIS AND DESIGN OF BROADBAND TURNSTILE JUNCTIONS. Hernández de Elche, Avda. de la Universidad s/n, E Elche, Alicante, Spain
Progress In Electromagnetics Research Letters, Vol. 24, 149 158, 2011 FULL-WAVE ANALYSIS AND DESIGN OF BROADBAND TURNSTILE JUNCTIONS A. A. San Blas 1, *, F. J. Pérez 2, J. Gil 2, F. Mira 3, V. E. Boria
More informationA Wideband suspended Microstrip Patch Antenna
A Wideband suspended Microstrip Patch Antenna Miss.Madhuri Gaharwal 1, Dr,Archana Sharma 2 1 PG student, EC department, TIT(E),Bhopal 2 Assosiate Professor,EC department, TIT(E),Bhopal ABSTRACT In this
More informationMulti-Band Cylindrical Dielectric Resonator Antenna Using Permittivity Variation in Azimuth Direction
Progress In Electromagnetics Research C, Vol. 59, 11 20, 2015 Multi-Band Cylindrical Dielectric Resonator Antenna Using Permittivity Variation in Azimuth Direction Raghvendra K. Chaudhary 1, *, Kumar V.
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 informationA 3 20GHz Vivaldi Antenna with Modified Edge
A 3 20GHz Vivaldi Antenna with Modified Edge Bieng-Chearl Ahn* * and Otgonbaatar Gombo Applied Electromagnetics Laboratory, Department of Radio and Communications Engineering Chungbuk National University,
More informationGAUSSIAN PROFILED HORN ANTENNAS
GAUSSIAN PROFILED HORN ANTENNAS Ramón Gonzalo, Jorge Teniente and Carlos del Río Dpto. Ing. Eléctrica y Electrónica, Public University of Navarra Campus Arrosadía s/n, 31006, Pamplona, Spain e-mail: carlos@upna.es
More informationA Miniaturized Wide-Band LTCC Based Fractal Antenna
A Miniaturized Wide-Band LTCC Based Fractal Antenna Farhan A. Ghaffar, Atif Shamim and Khaled N. Salama Electrical Engineering Program King Abdullah University of Science and Technology Thuwal 23955-6500,
More information