The below identified patent application is available for licensing. Requests for information should be addressed to:
|
|
|
- Lynne Page
- 5 years ago
- Views:
Transcription
1 DEPARTMENT OF THE NAVY OFFICE OF COUNSEL NAVAL UNDERSEA WARFARE CENTER DIVISION 1176 HOWELL STREET NEWPORT Rl IN REPLY REFER TO Attorney Docket No May 2017 The below identified patent application is available for licensing. Requests for information should be addressed to: Serial Number 15/220,668 Filing Date 26 July 2016 Inventor David A. Tonn TECHNOLOGY PARTNERSHIP ENTERPRISE OFFICE NAVAL UNDERSEA WARFARE CENTER 1176 HOWELL ST. CODE 00T2, BLDG. 102T NEWPORT, RI Address any questions concerning this matter to the Office of Technology Transfer at (401) DISTRIBUTION STATEMENT Approved for Public Release Distribution is unlimited
2 SLOTTED ANTENNA WITH ANISOTROPIC MAGNETIC LOADING STATEMENT OF GOVERNMENT INTEREST [0001] The invention described herein may be manufactured and used by or for the Government of the United States of America for governmental purposes without the payment of any royalties thereon or therefor. [0002] None. CROSS REFERENCE TO OTHER PATENT APPLICATIONS BACKGROUND OF THE INVENTION (1) Field of the Invention [0003] The present invention is directed to a slotted antenna having enhanced broadband characteristics. (2) Description of the Prior Art [0004] Slotted cylinder antennas are popular antennas for use in line of sight communications systems, especially where the carrier frequency exceeds 300 MHz. FIG. 1 provides a diagram of a prior art slotted cylinder antenna 10. Antenna 10 includes a metallic cylinder 12 having slot 14 cut into the wall of the cylinder 12. Cylinder 12 can be any thickness as long as skin effects are avoided. Slot 14 is parallel to an axis 16 of cylinder 12. Axis 16 is perpendicular to a ground plane 18. In the antenna shown, slot 14 extends the entire length of the cylinder 12. The interior of the cylinder or cavity is 1 of 10
3 typically filled with air but another dielectric material can be used. FIG. 1 shows an end-fed version of this antenna, but this antenna can also be center-fed. In the end-fed version, a transmission line having a first conductor 20 is provided through the ground plane 18 and connected across the slot 14 near one end of the slot 14. A second conductor 22 is shown grounded to the ground plane 18. Transmission line can be either a balanced line, such as a twisted pair, or an unbalanced line, such as a length of coaxial line (shown). In either case, the feeding transmission line 22 has two conductors in order to connect across slot 14. The optimal frequency of this antenna 10 is given by the length of the slot 14. The size of the cavity and the slot width govern bandwidth. [0005] FIG. 2 shows a computed voltage standing wave ratio (VSWR) for this antenna. The VSWR is a figure of merit used in determining the impedance bandwidth of the antenna. Typically this bandwidth is the continuous range of frequencies for which VSWR < 3:1. For the example shown in FIG. 2, resonant character of the antenna can be seen in the oscillatory nature of the VSWR curve, and modest bandwidth in each passband. SUMMARY OF THE INVENTION [0006] It is a first object of the present invention to provide a compact antenna capable of transmitting and receiving. 2 of 10
4 [0007] Another object is to provide such an antenna having a bandwidth of at least one octave. [0008] One particular object is to provide an antenna for use in the commercial VHF radio band. [0009] Yet another object is to provide an antenna design that can be scaled to different radio bands. [0010] Accordingly, there is provided an antenna that can be joined to an antenna feed and positioned perpendicular to a ground plane. The antenna includes a conductive radiator having a cylindrical portion. A slot is formed in the entire length of the cylindrical portion. Two parallel fins extend from the cylindrical portion at the slot. The fins can extend inwardly or outwardly. The antenna feed is connected to the conductive radiator on either side of the slot. An anisotropic magnetic material having a uniaxial permeability tensor is positioned in the slot between the two fins. This material is oriented such that it has a much greater permeability in the radial direction than in the other directions. The interior of the cylindrical portion can be filled with a dielectric material. BRIEF DESCRIPTION OF THE DRAWINGS [0011] Reference is made to the accompanying drawings in which are shown an illustrative embodiment of the invention, 3 of 10
5 wherein corresponding reference characters indicate corresponding parts, and wherein: [0012] FIG. 1 is a perspective view of a prior art antenna. [0013] FIG. 2 is a modeled plot of VSWR against frequency of the prior art antenna. [0014] FIG. 3 is a perspective view of an antenna embodiment in accordance with the current invention. [0015] FIG. 4 is a modeled plot of VSWR against frequency of an antenna without anisotropic magnetic material. [0016] FIG. 5 is a modeled plot of VSWR against frequency of the antenna embodiment shown in FIG. 3. [0017] FIG. 6 is a perspective view of an alternative antenna embodiment. [0018] FIG. 7A is a top view of an embodiment of the cylindrical shell. [0019] FIG. 7B is another view of an embodiment of the cylindrical shell. [0020] FIG. 7C is yet another view of an embodiment of the cylindrical shell. DETAILED DESCRIPTION OF THE INVENTION [0021] FIG. 3 shows a perspective view of an embodiment of the antenna 10. Antenna 10 includes a cylindrical radiator 12 having a slot 14 formed longitudinally therein parallel to an 4 of 10
6 axis 16 of cylindrical radiator 12. Ground plane 18 should be electrically small (less than 1/5 wavelength) in diameter or on average. Opposed fins 24 and 26 are positioned on opposite sides of slot 14. Fins 24 and 26 are parallel and directed inward, parallel to a radius of cylindrical radiator 12. The volume of slot 14 between fins 24 and 26 is filled with an anisotropic magnetic material 28 with a uniaxial permeability tensor. This means that the material is strongly polarized in one direction and weakly polarized in other directions. If the plane of one of the fins is parallel to the x-z coordinate plane, the material parameters required for proper orientation of the anisotropic magnetic material 28 are µ yy =µ zz =1, µ xx >8 with a uniaxial dielectric tensor. Thus, properties are different through the radial depth of the anisotropic magnetic material. The coordinate axis used is shown in the lower left corner of the FIG. Using this coordinate system, the radial direction is parallel to the x axis, the transverse direction is parallel to the y axis, and the longitudinal direction is parallel with the z axis. [0022] Cylindrical radiator 12 is positioned above and electrically isolated from a ground plane 18. A coaxial feed is shown having a first element 20 and a second element 22 in contact with radiator 12 and positioned across slot 14. First 5 of 10
7 element 20 is positioned on one side of slot 14, and second element 22 is positioned on an opposite side of slot 14. [0023] FIG. 4 shows a modeled VSWR plot of an antenna having a slotted cylindrical shell like that of the antenna 10 shown in FIG. 3 but without anisotropic magnetic material positioned between the fins 24 and 26. This plot shows a first passband at 30 and a second passband at 32. The first passband has a bandwidth ratio of approximately 1.87:1. (The small region near 120 MHz where VSWR is slightly >3 is included in the first passband.) [0024] FIG. 5 provides a modeled VSWR plot of an antenna having a slotted cylindrical shell with anisotropic magnetic material positioned in the slot. The anisotropic magnetic material had a µ xx =10 with the other components all equaling unity. This plot shows a single passband 34 with a roughly 3:1 bandwidth. [0025] FIG. 6 provides a perspective view of an alternative embodiment 10 of the antenna. As with the first embodiment antenna 10 includes a cylindrical radiator 12 having a slot 14 formed longitudinally therein parallel to an axis 16 of cylindrical radiator 12. Opposed fins 24 and 26 are positioned on opposite sides of slot 14. Fins 24 and 26 are parallel and directed outward, parallel to a radius of cylindrical radiator 12. Slot 14 between fins 24 and 26 is 6 of 10
8 filled with an anisotropic magnetic material 28 with a uniaxial permeability tensor. The planes of the fins are parallel to the x-z coordinate plane. The anisotropic magnetic material 28 permeabilities are µ yy =µ zz =1, µ xx >8 with a uniaxial permeability tensor. As before, cylindrical radiator 12 is positioned above and electrically isolated from a ground plane 18. Coaxial feed has elements 20 and 22 in contact with radiator 12 and positioned across slot 14. The interior region of cylindrical shell 12 can be filled with a dielectric material that doesn t interfere with the electrical or magnetic properties of the antenna. Syntactic foam could be used for this. [0026] One possible application of this antenna is in digital television and cellular communications towers. The broader bandwidth of this type of antenna will allow usage of a single antenna by a user with different services. As a relatively compact antenna, this can also be used for mast mounted antennas. Its characteristics may help simplify the tuning electronics in legacy radio applications. [0027] This antenna has further advantages in terms of polarization. Normally, a vertically disposed slot antenna will produce a radiation field that is horizontally polarized. In the case of the present invention, vertical polarization is predicted by the current modeling. Modeling indicates a theta 7 of 10
9 component to the radiated field that is one order of magnitude larger than the phi component in the x-y plane. [0028] It will be understood that many additional changes in the details, materials, steps and arrangement of parts, which have been herein described and illustrated in order to explain the nature of the invention, may be made by those skilled in the art within the principle and scope of the invention as expressed in the appended claims. For example, fins can be truly radial or otherwise positioned as long as they are not close enough to each other to cause capacitive coupling. This is shown in the top view of cylindrical radiator given in FIG. 7A and FIG. 7B. In FIG. 7A, shell 40 has opposed fins 42 and 44 on either side of slot 46. Fins 42 and 44 are not parallel to each other and are oriented radially inward. As before, an anisotropic magnetic material 48 with a uniaxial permeability tensor is positioned between fins 42 and 44. FIG. 7B has a shell 40 with opposed fins 42 and 44 positioned on either side of a slot 46. Anisotropic magnetic material is positioned in the slot, between fins 42 and 44. Opposed fins 42 and 44 in this embodiment extend radially outward from shell 40. In FIG. 7C, the embodiment has a cylinder 50 having fins 52 and 54. Fins 52 and 54 extend inward in a general direction and are generally opposed. Anisotropic magnetic material 58 is positioned in slot 56. It is thus shown that fins can be oriented at different 8 of 10
10 angles to the axis of a cylinder, and the fins do not need to be parallel to one another. [0029] The foregoing description of the preferred embodiments of the invention has been presented for purposes of illustration and description only. It is not intended to be exhaustive, nor to limit the invention to the precise form disclosed; and obviously, many modification and variations are possible in light of the above teaching. Such modifications and variations that may be apparent to a person skilled in the art are intended to be included within the scope of this invention as defined by the accompanying claims. 9 of 10
11 SLOTTED ANTENNA WITH ANISOTROPIC MAGNETIC LOADING ABSTRACT OF THE DISCLOSURE An antenna can be joined to an antenna feed and positioned perpendicular to a ground plane. The antenna includes a conductive radiator having a cylindrical portion. A slot is formed in the entire length of the cylindrical portion. Two parallel fins extend from the cylindrical portion at the slot. The fins can extend inwardly or outwardly. The antenna feed is connected to the conductive radiator on either side of the slot. An anisotropic magnetic material having a uniaxial permeability tensor is positioned in the slot between the two fins. This material is oriented such that it has a much greater permeability in the radial direction than in the other directions. The interior of the cylindrical portion can be filled with a dielectric material. 10 of 10
12
13
14
15
The below identified patent application is available for licensing. Requests for information should be addressed to:
DEPARTMENT OF THE NAVY OFFICE OF COUNSEL NAVAL UNDERSEA WARFARE CENTER DIVISION 1176 HOWELL STREET NEWPORT Rl 02841-1708 IN REPLY REFER TO Attorney Docket No. 300104 25 May 2017 The below identified patent
Attorney Docket No Date: 20 June 2007
DEPARTMENT OF THE NAVY NAVAL UNDERSEA WARFARE CENTER DIVISION NEWPORT OFFICE OF COUNSEL PHONE: (401) 832-3653 FAX: (401) 832-4432 NEWPORT DSN: 432-3653 Attorney Docket No. 82441 Date: 20 June 2007 The
DEPARTMENT OF THE NAVY DIVISION NEWPORT OFFICE OF COUNSEL PHONE: FAX: DSN:
M/KX/SEA WARFARE CENTERS NEWPORT DEPARTMENT OF THE NAVY NAVAL UNDERSEA WARFARE CENTER DIVISION NEWPORT OFFICE OF COUNSEL PHONE: 401 832-3653 FAX: 401 832-4432 DSN: 432-3653 Attorney Docket No. 99298 Date:
The below identified patent application is available for licensing. Requests for information should be addressed to:
DEPARTMENT OF THE NAVY OFFICE OF COUNSEL NAVAL UNDERSEA WARFARE CENTER DIVISION 1176 HOWELL STREET NEWPORT Rl 02841-1708 IN REPLY REFER TO Attorney Docket No. 300001 25 February 2016 The below identified
The below identified patent application is available for licensing. Requests for information should be addressed to:
DEPARTMENT OF THE NAVY OFFICE OF COUNSEL NAVAL UNDERSEA WARFARE CENTER DIVISION 1176 HOWELL STREET NEWPORT Rl 02841-1708 IN REPLY REFER TO Attorney Docket No. 102079 23 February 2016 The below identified
DEPARTMENT OF THE NAVY. The below identified patent application is available for licensing. Requests for information should be addressed to:
DEPARTMENT OF THE NAVY OFFICE OF COUNSEL NAVAL UNDERSEA WARFARE CENTER DIVISION 1176 HOWELL STREET NEWPORT Rl 02841-1708 IN REPLY REFER TO: Attorney Docket No. 82649 Date: 23 September 2004 The below identified
DEPARTMENT OF THE NAVY DIVISION NEWPORT OFFICE OF COUNSEL PHONE: FAX: DSN:
N/WSEA WARFARE CENTERS NEWPORT DEPARTMENT OF THE NAVY NAVAL UNDERSEA WARFARE CENTER DIVISION NEWPORT OFFICE OF COUNSEL PHONE: 401 832-3653 FAX: 401 832-4432 DSN: 432-3653 Attorney Docket No. 98839 Date:
The below identified patent application is available for licensing. Requests for information should be addressed to:
DEPARTMENT OF THE NAVY OFFICE OF COUNSEL NAVAL UNDERSEA WARFARE CENTER DIVISION 1176 HOWELL STREET NEWPORT Rl 0841-1708 IN REPLY REFER TO Attorney Docket No. 300048 7 February 017 The below identified
The below identified patent application is available for licensing. Requests for information should be addressed to:
DEPARTMENT OF THE NAVY OFFICE OF COUNSEL NAVAL UNDERSEA WARFARE CENTER DIVISION 1176 HOWELL STREET NEWPORT Rl 02841-1708 IN REPLY REFER TO Attorney Docket No. 300119 25 May 2017 The below identified patent
Attorney Docket No Date: 9 July 2007
DEPARTMENT OF THE NAVY NAVAL UNDERSEA WARFARE CENTER DIDMSION NEWPORT OFFICE OF COUNSEL PHONE: (401) 832-3653 FAX: (401) 832-4432 NEWPORT DSN: 432-3653 Date: 9 July 2007 The below identified patent application
DISTRIBUTION STATEMENT A Approved for Public Release Distribution Unlimited
Serial Number 09/152.477 Filing Date 11 September 1998 Inventor Anthony A. Ruffa NOTICE The above identified patent application is available for licensing. Requests for information should be addressed
DEPARTMENT OF THE NAVY. The below identified patent application is available for licensing. Requests for information should be addressed to:
DEPARTMENT OF THE NAVY OFFICE OF COUNSEL NAVAL UNDERSEA WARFARE CENTER DIVISION 1176 HOWELL STREET NEWPORT Rl 02841-1708 IN REPLY REFER TO; Attorney Docket No. 78371 Date: 15 May 2002 The below identified
Attorney Docket No Date: 25 April 2008
DEPARTMENT OF THE NAVY NAVAL UNDERSEA WARFARE CENTER DIVISION NEWPORT OFFICE OF COUNSEL PHONE: (401) 832-3653 FAX: (401) 832-4432 NEWPORT DSN: 432-3853 Attorney Docket No. 98580 Date: 25 April 2008 The
I\1AA/5EA WARFARE CENTERS NEWPORT
I\1AA/5EA WARFARE CENTERS NEWPORT DEPARTMENT OF THE NAVY NAVAL UNDERSEA WARFARE CENTER DIVISION NEWPORT OFFICE OF COUNSEL PHONE: 401 832-3653 FAX: 401 832-4432 DSN: 432-3653 Attorney Docket No. 99213 Date:
NOTICE. The above identified patent application is available for licensing. Requests for information should be addressed to:
Serial No.. Filing Date 1 July 1 Inventor Earl S. Nickerson Wayne C. Tucker NOTICE The above identified patent application is available for licensing. Requests for information should be addressed to: ÄBprovsa
John J. Vaillancourt Steven L. Camara Daniel W. French NOTICE
Serial Number Filing Date Inventor 09/152.475 11 September 1998 John J. Vaillancourt Steven L. Camara Daniel W. French NOTICE The above identified patent application is available for licensing. Requests
William H. Nedderman, Jr. NOTICE. The above identified patent application is available for licensing. Requests for information should be addressed to:
_ _ Serial Number Filing Date Inventor 09/332,407 14 June 1999 William H. Nedderman, Jr. NOTICE The above identified patent application is available for licensing. Requests for information should be addressed
Distribution Unlimited Attorney Docket No Date: 17 November 2005
OP DEPARTMENT OF THE NAVY NAVAL UNDERSEA WARFARE CENTER DIVISION NEWPORT OFFICE OF COUNSEL (PATENTS) 1176 HOWELL STREET BUILDING 112T, CODE OOOC NEWPORT, RHODE ISLAND 02841-1708 PHONE: 401 832-4736 FAX:
The below identified patent application is available for licensing. Requests for information should be addressed to:
NEWPORT DEPARTMENT OF THE NAVY NAVAL UNDERSEA WARFARE CENTER DIVISION NEWPORT OFFICE OF COUNSEL PHONE: 401 832-3653 FAX: 401 832-4432 DSN: 432-3653 Attorney Docket No. 99231 Date: 6 April 2010 The below
(12) Patent Application Publication (10) Pub. No.: US 2005/ A1
(19) United States US 2005O134516A1 (12) Patent Application Publication (10) Pub. No.: Du (43) Pub. Date: Jun. 23, 2005 (54) DUAL BAND SLEEVE ANTENNA (52) U.S. Cl.... 3437790 (75) Inventor: Xin Du, Schaumburg,
NOTICE. The above identified patent application is available for licensing. Requests for information should be addressed to:
Serial Number 09/678.897 Filing Date 4 October 2000 Inventor Normal L. Owsley Andrew J. Hull NOTICE The above identified patent application is available for licensing. Requests for information should be
NOTICE. The above identified patent application is available for licensing. Requests for information should be addressed to:
Serial Number 09/513.740 Filing Date 24 February 2000 Inventor David L. Culbertson Raymond F. Travelyn NOTICE The above identified patent application is available for licensing. Requests for information
Antennas Prof. Girish Kumar Department of Electrical Engineering Indian Institute of Technology, Bombay. Module 2 Lecture - 10 Dipole Antennas-III
Antennas Prof. Girish Kumar Department of Electrical Engineering Indian Institute of Technology, Bombay Module 2 Lecture - 10 Dipole Antennas-III Hello, and welcome to todays lecture on Dipole Antenna.
CHAPTER 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
NOTICE. The above identified patent application is available for licensing. Requests for information should be addressed to:
Serial Number 09/548.387 Filing Date 11 April 2000 Inventor Theodore R. Anderson Edward R. Javor NOTICE The above identified patent application is available for licensing. Requests for information should
NOTICE. The above identified patent application is available for licensing. Requests for information should be addressed to:
Serial Number 09/663.421 Filing Date 15 September 2000 Inventor G. Clifford Carter Harold J. Teller NOTICE The above identified patent application is available for licensing. Requests for information should
(12) United States Patent (10) Patent No.: US 7,639,203 B2
USOO7639203B2 (12) United States Patent () Patent No.: US 7,639,203 B2 HaO (45) Date of Patent: Dec. 29, 2009 (54) SPIRAL COIL LOADED SHORT WIRE (52) U.S. Cl.... 343/895; 343/719; 343/745 ANTENNA (58)
FORM 2 THE PATENTS ACT, (39 of 1970) & The Patent Rules, 2003 COMPLETE SPECIFICATION
FORM 2 THE PATENTS ACT, 1970 (39 of 1970) & The Patent Rules, 2003 COMPLETE SPECIFICATION 1. TITLE OF THE INVENTION: CURRENT TRANSFORMER 2. APPLICANTS: Name: SEARI ELECTRIC TECHNOLOGY CO., LTD. Nationality:
Traveling Wave Antennas
Traveling Wave Antennas Antennas with open-ended wires where the current must go to zero (dipoles, monopoles, etc.) can be characterized as standing wave antennas or resonant antennas. The current on these
UNIVERSITI MALAYSIA PERLIS
UNIVERSITI MALAYSIA PERLIS SCHOOL OF COMPUTER & COMMUNICATIONS ENGINEERING EKT 341 LABORATORY MODULE LAB 2 Antenna Characteristic 1 Measurement of Radiation Pattern, Gain, VSWR, input impedance and reflection
A NOVEL DUAL-BAND PATCH ANTENNA FOR WLAN COMMUNICATION. E. Wang Information Engineering College of NCUT China
Progress In Electromagnetics Research C, Vol. 6, 93 102, 2009 A NOVEL DUAL-BAND PATCH ANTENNA FOR WLAN COMMUNICATION E. Wang Information Engineering College of NCUT China J. Zheng Beijing Electro-mechanical
REPORT DOCUMENTATION PAGE
REPORT DOCUMENTATION PAGE Form Approved OMB No. 0704-0188 Public reporting burden for this collection of information is estimated to average 1 hour per response, including the time for reviewing instructions,
... OFFICE OF COUNSEL PHONE: NEWPORT FAX: DSN:
DEPARTMENT OF THE NAVY NAVAL UNDERSEA WARFARE CENTER DIVISION NEWPORT... OFFICE OF COUNSEL PHONE: 401 832-3653 NEWPORT FAX: 401 832-4432 DSN: 432-3653 Attorney Docket No. 80227 Date: 2 July 2008 The below
Attorney Docket No Date: 15 March 2002
DEPARTMENT OF THE NAVY OFFICE OF COUNSEL NAVAL UNDERSEA WARFARE CENTER DIVISION 1176 HOWELL STREET NEWPORT RI 02841-1708 IN REPLY REFER TO: Attorney Docket No. 82646 Date: 15 March 2002 The below identified
The Basics of Patch Antennas, Updated
The Basics of Patch Antennas, Updated By D. Orban and G.J.K. Moernaut, Orban Microwave Products www.orbanmicrowave.com Introduction This article introduces the basic concepts of patch antennas. We use
Technician License Course Chapter 4. Lesson Plan Module 9 Antenna Fundamentals, Feed Lines & SWR
Technician License Course Chapter 4 Lesson Plan Module 9 Antenna Fundamentals, Feed Lines & SWR The Antenna System Antenna: Transforms current into radio waves (transmit) and vice versa (receive). Feed
Chapter 5 DESIGN AND IMPLEMENTATION OF SWASTIKA-SHAPED FREQUENCY RECONFIGURABLE ANTENNA ON FR4 SUBSTRATE
Chapter 5 DESIGN AND IMPLEMENTATION OF SWASTIKA-SHAPED FREQUENCY RECONFIGURABLE ANTENNA ON FR4 SUBSTRATE The same geometrical shape of the Swastika as developed in previous chapter has been implemented
(12) United States Patent
(12) United States Patent US007.961391 B2 (10) Patent No.: US 7.961,391 B2 Hua (45) Date of Patent: Jun. 14, 2011 (54) FREE SPACE ISOLATOR OPTICAL ELEMENT FIXTURE (56) References Cited U.S. PATENT DOCUMENTS
(12) Patent Application Publication
(19) United States (12) Patent Application Publication Ryken et al. US 2003.0076261A1 (10) Pub. No.: US 2003/0076261 A1 (43) Pub. Date: (54) MULTIPURPOSE MICROSTRIPANTENNA FOR USE ON MISSILE (76) Inventors:
(12) United States Patent
USOO7325359B2 (12) United States Patent Vetter (10) Patent No.: (45) Date of Patent: Feb. 5, 2008 (54) (75) (73) (*) (21) (22) (65) (51) (52) (58) (56) PROJECTION WINDOW OPERATOR Inventor: Gregory J. Vetter,
Technician Licensing Class. Antennas
Technician Licensing Class Antennas Antennas A simple dipole mounted so the conductor is parallel to the Earth's surface is a horizontally polarized antenna. T9A3 Polarization is referenced to the Earth
DEPARTMENT OF THE NAVY DIVISION NEWPORT OFFICE OF COUNSEL PHONE: FAX: DSN:
IM/n/SBA WARFARE CENTERS NEWPORT DEPARTMENT OF THE NAVY NAVAL UNDERSEA WARFARE CENTER DIVISION NEWPORT OFFICE OF COUNSEL PHONE: 401 832-3653 FAX: 401 832-4432 DSN: 432-3653 Attorney Docket No. 84139 Date:
I J E E Volume 5 Number 1 January-June 2013 pp
I J E E Volume 5 Number 1 January-June 2013 pp. 21-25 Serials Publications, ISSN : 0973-7383 Various Antennas and Its Applications in Wireless Domain: A Review Paper P.A. Ambresh 1, P.M. Hadalgi 2 and
Chapter 2. Modified Rectangular Patch Antenna with Truncated Corners. 2.1 Introduction of rectangular microstrip antenna
Chapter 2 Modified Rectangular Patch Antenna with Truncated Corners 2.1 Introduction of rectangular microstrip antenna 2.2 Design and analysis of rectangular microstrip patch antenna 2.3 Design of modified
(12) United States Patent (10) Patent No.: US 7.458,305 B1
US007458305B1 (12) United States Patent (10) Patent No.: US 7.458,305 B1 Horlander et al. (45) Date of Patent: Dec. 2, 2008 (54) MODULAR SAFE ROOM (58) Field of Classification Search... 89/36.01, 89/36.02,
Christen Rauscher NOTICE. The above identified patent application is available for licensing. Requests for information should be addressed to:
Serial Number Filing Date Inventor 069.855 30 April 1998 Christen Rauscher NOTICE The above identified patent application is available for licensing. Requests for information should be addressed to: OFFICE
Monopole Antennas. Prof. Girish Kumar Electrical Engineering Department, IIT Bombay. (022)
Monopole Antennas Prof. Girish Kumar Electrical Engineering Department, IIT Bombay gkumar@ee.iitb.ac.in (022) 2576 7436 Monopole Antenna on Infinite Ground Plane Quarter-wavelength monopole Antenna on
Chapter 6 Antenna Basics. Dipoles, Ground-planes, and Wires Directional Antennas Feed Lines
Chapter 6 Antenna Basics Dipoles, Ground-planes, and Wires Directional Antennas Feed Lines Some General Rules Bigger is better. (Most of the time) Higher is better. (Most of the time) Lower SWR is better.
(12) United States Patent
(12) United States Patent MOOre USOO6573869B2 (10) Patent No.: US 6,573,869 B2 (45) Date of Patent: Jun. 3, 2003 (54) MULTIBAND PIFA ANTENNA FOR PORTABLE DEVICES (75) Inventor: Thomas G. Moore, Mount Prospect,
United States Patent [19]
![United States Patent [19]](/thumbs/90/101999790.jpg "United States Patent [19]")
United States Patent [19] Landeis 111111 1111111111111111111111111111111111111111111111111111111111111 US005904033A [11] Patent Number: [45] Date of Patent: May 18, 1999 [54] VINE CUTTER [76] Inventor:
(12) United States Patent
US008133074B1 (12) United States Patent Park et al. (10) Patent No.: (45) Date of Patent: Mar. 13, 2012 (54) (75) (73) (*) (21) (22) (51) (52) GUIDED MISSILE/LAUNCHER TEST SET REPROGRAMMING INTERFACE ASSEMBLY
SAGITTAL SAW BACKGROUND OF THE INVENTION
SAGITTAL SAW BACKGROUND OF THE INVENTION Sagittal bone saws function through angular oscillation of the saw cutting blade, and are used primarily in applications that require plunge cutting of bone. However,
Reconfigurable Patch Slot Antenna for Circular Polarization Diversity
419 Reconfigurable Patch Slot Antenna for Circular Polarization Diversity Dr. S. Raghavan*, D. Sriram Kumar, M.S. Kishore Kumar Department of Electronics and Communications National Institute of Technology,
(51) Int Cl.: H01Q 1/36 ( ) (56) References cited:
(19) (12) EUROPEAN PATENT SPECIFICATION (11) EP 1 597 794 B1 (45) Date of publication and mention of the grant of the patent: 20.08.2008 Bulletin 2008/34 (21) Application number: 03815944.8 (22) Date of
United States Patent (19) (11) 4,130,822
34.3a700 MS AU 26 EX l9/78 OR 4 gl30,822 United States Patent (19) (11) 4,130,822 Conroy Dec. 19, 1978 l2/ - (4) S A FOREIGN PATENT DOCUMENTS (7 Inventor: Peter J. Conroy, Scottsdale, Ariz. 10083 9/193
United States Patent 19 Perets
United States Patent 19 Perets USOO5623875A 11 Patent Number: 45 Date of Patent: 5,623,875 Apr. 29, 1997 54 MULTI-COLOR AND EASY TO ASSEMBLE AUTOMATIC RUBBER STAMP 76 Inventor: Mishel Perets, clo M. Perets
Proximity 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
TEPZZ A T EP A2 (19) (11) EP A2 (12) EUROPEAN PATENT APPLICATION. (51) Int Cl.: H02K 11/04 ( )
(19) TEPZZ 765688A T (11) EP 2 765 688 A2 (12) EUROPEAN PATENT APPLICATION (43) Date of publication: 13.08.2014 Bulletin 2014/33 (51) Int Cl.: H02K 11/04 (2006.01) (21) Application number: 14154185.4 (22)
CHAPTER 8 ANTENNAS 1
CHAPTER 8 ANTENNAS 1 2 Antennas A good antenna works A bad antenna is a waste of time & money Antenna systems can be very inexpensive and simple They can also be very expensive 3 Antenna Considerations
(12) United States Patent (10) Patent No.: US 6,385,876 B1
USOO6385876B1 (12) United States Patent (10) Patent No.: McKenzie () Date of Patent: May 14, 2002 (54) LOCKABLE LICENSE PLATE COVER 2,710,475 A 6/1955 Salzmann... /202 ASSEMBLY 3,304,642 A 2/1967 Dardis...
(12) United States Patent (10) Patent No.: US 6,762,730 B2
USOO676273OB2 (12) United States Patent (10) Patent No.: Schadler (45) Date of Patent: Jul. 13, 2004 (54) CROSSED BOW TIE SLOT ANTENNA 3,623,162 A * 11/1971 Whitty... 343/767 6,424,309 B1 7/2002 Johnston
A Method of Mapping Resistive or Conductive offshore Targets also an Apparatus for Applying the Method
A Method of Mapping Resistive or Conductive offshore Targets also an Apparatus for Applying the Method BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention is related to a method
Practical Antennas and. Tuesday, March 4, 14
Practical Antennas and Transmission Lines Goals Antennas are the interface between guided waves (from a cable) and unguided waves (in space). To understand the various properties of antennas, so as to
New Antenna Designs for DTV Implementation
New Antenna Designs for DTV Implementation JOHN L. SCHADLER and KERRY COZAD Dielectric Communications Raymond, Maine ABSTRACT WIDE BAND CAVITY ANTENNA (TFU-WB) Over the past few years the implementation
Welcome to AntennaSelect Volume 1 August 2013
Welcome to AntennaSelect Volume 1 August 2013 This is the first issue of our new periodic newsletter, AntennaSelect. AntennaSelect will feature informative articles about antennas and antenna technology,
The below identified patent application is available for licensing. Requests for information should be addressed to:
NEWPORT DEPARTMENT OF THE NAVY NAVAL UNDERSEA WARFARE CENTER DIVISION NEWPORT OFFICE OF COUNSEL PHONE: 401 832-3653 FAX: 401 832-4432 DSN: 432-3653 Attorney Docket No. 99667 Date: 27 January 2010 The below
United States Patent (19) Rannou et al.
United States Patent (19) Rannou et al. (54) (75) 73 22) (21) 30) 52 (51) (58) (56) WIDE-BAND OMNIDIRECTIONAL ANTENNA Inventors: Jean Rannou; William Luther, both of Paris, France Assignee: Thomson-CSF,
(12) United States Patent (10) Patent No.: US 6, 177,908 B1
USOO6177908B1 (12) United States Patent (10) Patent No.: US 6, 177,908 B1 Kawahata et al. (45) Date of Patent: Jan. 23, 2001 (54) SURFACE-MOUNTING TYPE ANTENNA, 5,861,854 * 1/1999 Kawahate et al.... 343/700
United States Patent (19) Lund
United States Patent (19) Lund 54 BROACHING CUTTER 76 Inventor: David R. Lund, 1823 Cornish Ave., Charleston, S.C. 29412 21 Appl. No.: 903,157 22 Filed: Jul. 30, 1997 Related U.S. Application Data 62 Division
CHAPTER - 6 PIN DIODE CONTROL CIRCUITS FOR WIRELESS COMMUNICATIONS SYSTEMS
CHAPTER - 6 PIN DIODE CONTROL CIRCUITS FOR WIRELESS COMMUNICATIONS SYSTEMS 2 NOTES 3 INTRODUCTION PIN DIODE CONTROL CIRCUITS FOR WIRELESS COMMUNICATIONS SYSTEMS Chapter 6 discusses PIN Control Circuits
Altering vibration frequencies of workpieces, such as gas turbine engine blades. Abstract
United States Patent 5,988,982 Clauer November 23, 1999 Altering vibration frequencies of workpieces, such as gas turbine engine blades Abstract A method of modifying the vibration resonance characteristics
(12) Patent Application Publication (10) Pub. No.: US 2001/ A1
US 2001 0004 175A1 (19) United States (12) Patent Application Publication (10) Pub. No.: US 2001/0004175 A1 Kelleher (43) Pub. Date: Jun. 21, 2001 (54) GENERATOR STATOR SLOT WEDGE Related U.S. Application
A. A. Kishk and A. W. Glisson Department of Electrical Engineering The University of Mississippi, University, MS 38677, USA
Progress In Electromagnetics Research, PIER 33, 97 118, 2001 BANDWIDTH ENHANCEMENT FOR SPLIT CYLINDRICAL DIELECTRIC RESONATOR ANTENNAS A. A. Kishk and A. W. Glisson Department of Electrical Engineering
L-BAND COPLANAR SLOT LOOP ANTENNA FOR INET APPLICATIONS
L-BAND COPLANAR SLOT LOOP ANTENNA FOR INET APPLICATIONS Jeyasingh Nithianandam Electrical and Computer Engineering Department Morgan State University, 500 Perring Parkway, Baltimore, Maryland 5 ABSTRACT
/ 7. 2 LOWER CASE. (12) United States Patent US 6,856,819 B2. Feb. 15, (45) Date of Patent: (10) Patent No.: 5 PARASITIC ELEMENT
(12) United States Patent toh USOO6856819B2 (10) Patent No.: (45) Date of Patent: Feb. 15, 2005 (54) PORTABLE WIRELESS UNIT (75) Inventor: Ryoh Itoh, Tokyo (JP) (73) Assignee: NEC Corporation, Tokyo (JP)
Loop and Slot Antennas
Loop and Slot Antennas Prof. Girish Kumar Electrical Engineering Department, IIT Bombay gkumar@ee.iitb.ac.in (022) 2576 7436 Loop Antenna Loop antennas can have circular, rectangular, triangular or any
Technician License. Course
Technician License Course Technician License Course Chapter 4 Lesson Plan Module - 10 Practical Antennas The Dipole Most basic antenna The Dipole Most basic antenna The Dipole Total length is ½ wavelength
Study of Microstrip Slotted Antenna for Bandwidth Enhancement
Global Journal of Researches in Engineering Electrical and Electronics Engineering Volume 2 Issue 9 Version. Type: Double Blind Peer Reviewed International Research Journal Publisher: Global Journals Inc.
(12) Patent Application Publication (10) Pub. No.: US 2004/ A1
US 2004.0060551A1 (19) United States (12) Patent Application Publication (10) Pub. No.: US 2004/0060551A1 Gallops, JR. (43) Pub. Date: Apr. 1, 2004 (54) METHOD FOR MANUFACTURING (21) Appl. No.: 10/255.287
(12) Patent Application Publication (10) Pub. No.: US 2005/ A1
(19) United States US 20050092526A1 (12) Patent Application Publication (10) Pub. No.: US 2005/0092526A1 Fielder et al. (43) Pub. Date: May 5, 2005 (54) EXPANDABLE ECCENTRIC REAMER AND METHOD OF USE IN
(12) United States Patent
(12) United States Patent USOO9577348B2 (10) Patent No.: Gomme et al. (45) Date of Patent: Feb. 21, 2017 (54) COMBINATION ANTENNA USPC... 343/718, 702 (71) 1 dh (NL) 71) Applicant: NXP B.V., Eindhoven
Milton Keynes Amateur Radio Society (MKARS)
Milton Keynes Amateur Radio Society (MKARS) Intermediate Licence Course Feeders Antennas Matching (Worksheets 31, 32 & 33) MKARS Intermediate Licence Course - Worksheet 31 32 33 Antennas Feeders Matching
Analysis and design of broadband U-slot cut rectangular microstrip antennas
Sādhanā Vol. 42, No. 10, October 2017, pp. 1671 1684 DOI 10.1007/s12046-017-0699-4 Ó Indian Academy of Sciences Analysis and design of broadband U-slot cut rectangular microstrip antennas AMIT A DESHMUKH
Chapter 12: Transmission Lines. EET-223: RF Communication Circuits Walter Lara
Chapter 12: Transmission Lines EET-223: RF Communication Circuits Walter Lara Introduction A transmission line can be defined as the conductive connections between system elements that carry signal power.
Antenna Theory and Design
Antenna Theory and Design Antenna Theory and Design Associate Professor: WANG Junjun 王珺珺 School of Electronic and Information Engineering, Beihang University wangjunjun@buaa.edu.cn 13426405497 Chapter
(12) United States Patent
US007 153067B2 (12) United States Patent GreenW00d et al. () Patent No.: (45) Date of Patent: Dec. 26, 2006 (54) ROTARY CUTTING TOOL HAVING MULTIPLE HELICAL CUTTING EDGES WITH DIFFERING HELIX ANGLES (76)
(12) United States Patent (10) Patent No.: US 6,957,665 B2
USOO6957665B2 (12) United States Patent (10) Patent No.: Shin et al. (45) Date of Patent: Oct. 25, 2005 (54) FLOW FORCE COMPENSATING STEPPED (56) References Cited SHAPE SPOOL VALVE (75) Inventors: Weon
(12) United States Patent (10) Patent No.: US 6,920,822 B2
USOO6920822B2 (12) United States Patent (10) Patent No.: Finan (45) Date of Patent: Jul. 26, 2005 (54) DIGITAL CAN DECORATING APPARATUS 5,186,100 A 2/1993 Turturro et al. 5,677.719 A * 10/1997 Granzow...
FCC Technician License Course
FCC Technician License Course 2014-2018 FCC Element 2 Technician Class Question Pool Presented by: Tamiami Amateur Radio Club (TARC) WELCOME To the third of 4, 3-hour classes presented by TARC to prepare
30 DAY PILL CUTTING DEVICE
DN0311 30 DAY PILL CUTTING DEVICE Technical Field [001] The present invention relates to an improved pill or tablet cutting device and more particularly to a pill cutter for simultaneously cutting a plurality
USOO A United States Patent (19) 11 Patent Number: 5,931,325. Filipov (45) Date of Patent: Aug. 3, 1999
USOO593 1325A United States Patent (19) 11 Patent Number: 5,931,325 Filipov (45) Date of Patent: Aug. 3, 1999 54 ADJUSTABLE MUDRING FOR Primary Examiner Steven Pollard CONVENTIONAL ELECTRICAL OUTLET BOX
CHAPTER 5 ANALYSIS OF MICROSTRIP PATCH ANTENNA USING STACKED CONFIGURATION
1 CHAPTER 5 ANALYSIS OF MICROSTRIP PATCH ANTENNA USING STACKED CONFIGURATION 5.1 INTRODUCTION Rectangular microstrip patch with U shaped slotted patch is stacked, Hexagonal shaped patch with meander patch
C. 5. sa. (12) United States Patent US 9.484,628 B2. Nov. 1, (45) Date of Patent: (10) Patent No.: Petros
USOO9484628B2 (12) United States Patent Petros () Patent No.: (45) Date of Patent: US 9.484,628 B2 Nov. 1, 2016 (54) MULTIBAND FREQUENCY ANTENNA (71) Applicant: Argy Petros, Coconut Creek, FL (US) (72)
United States Patent (19) Blackburn et al.
United States Patent (19) Blackburn et al. 11 Patent Number: (4) Date of Patent: 4,21,042 Jun. 4, 198 4 THREADED CONNECTION 7) Inventors: Jan W. Blackburn, Kingwood; Burl E. Baron, Houston, both of Tex.
ANT6: The Half-Wave Dipole Antenna
In this lecture, we simplify the space radiating current analysis to include the special (but very important) case of the general wire antenna. Concentrating on results for the half-wave dipole, we demonstrate
Intermediate Course (5) Antennas and Feeders
Intermediate Course (5) Antennas and Feeders 1 System Transmitter 50 Ohms Output Standing Wave Ratio Meter Antenna Matching Unit Feeder Antenna Receiver 2 Feeders Feeder types: Coaxial, Twin Conductors
Design and Simulation of a Quarter Wavelength Gap Coupled Microstrip Patch Antenna
Design and Simulation of a Quarter Wavelength Gap Coupled Microstrip Patch Antenna Sanjay M. Palhade 1, S. P. Yawale 2 1 Department of Physics, Shri Shivaji College, Akola, India 2 Department of Physics,
Feed Line Currents for Neophytes.
Feed Line Currents for Neophytes. This paper discusses the sources of feed line currents and the methods used to control them. During the course of this paper two sources of feed line currents are discussed:
Least understood topics by most HAMs RF Safety Ground Antennas Matching & Feed Lines
Least understood topics by most HAMs RF Safety Ground Antennas Matching & Feed Lines Remember this question from the General License Exam? G0A03 (D) How can you determine that your station complies with
Dec. 8, 1964 J. V., JOHNSTON 3,160,018 ELECTRON GYROSCOPE. Filed Jan. 1, Sheets-Sheet l. James V. Johnston, INVENTOR
Dec. 8, 1964 J. V., JOHNSTON 3,160,018 Filed Jan. 1, 1963 4. Sheets-Sheet l James V. Johnston, INVENTOR. 3.22.2-4 Dec. 8, 1964 J. v. JoHNSTON 3,160,018 Filed Jan. Ill., 1963 4. Sheets-Sheet 2 James V.