US3611396A - Dual waveguide horn antenna - Google Patents
Dual waveguide horn antenna Download PDFInfo
- Publication number
- US3611396A US3611396A US47504A US3611396DA US3611396A US 3611396 A US3611396 A US 3611396A US 47504 A US47504 A US 47504A US 3611396D A US3611396D A US 3611396DA US 3611396 A US3611396 A US 3611396A
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- antenna
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q13/00—Waveguide horns or mouths; Slot antennas; Leaky-waveguide antennas; Equivalent structures causing radiation along the transmission path of a guided wave
- H01Q13/02—Waveguide horns
- H01Q13/0283—Apparatus or processes specially provided for manufacturing horns
- H01Q13/0291—Apparatus or processes specially provided for manufacturing horns for corrugated horns
Definitions
- a dual waveguide horn antenna is provided with a rigid foam having a dielectric constant approximately equal to that of air and tapered to conform to the shape of a conventional horn antenna.
- Two tapered walls are corrugated and all four walls are covered with a thin metallic coating of sufficient thickness to carry the RF current produced by the propogation of an electromagnetic wave through the dielectric.
- a metallic septum divides the dielectric into first and second waveguide sections and individual coaxial inputs are provided to each of the sections. Energy coupling between the two sections of the waveguide are significantly reduced by means of a microwave resistive material secured to the septum at the enlarged end of the dielectric.
- the resistive strip may comprise a carbonized substrate or an insulating material coated with the resistive film. Additionally, a thin film of paint may be applied directly to the metallic septum by various techniques including vacuum deposition.
- This invention relates generally to electromagnetic horn antennas, and more particularly to a dual waveguide horn antenna utilizing a lightweight foam material whose dielectric constant approximates that of air.
- Another object of the invention is to provide a horn antenna which is easy and inexpensive to construct as well as to modify.
- Yet another object is to provide a dual waveguide horn antenna having high gain and low side lobes.
- Still another object is to provide a dual waveguide horn antenna in which the coupling of energy between adjacent waveguide sections in significantly reduced.
- a dual waveguide antenna is provided with a rigid foam material whose dielectric constant approximates that of air.
- the dielectric is tapered to conform to the shape of a conventional horn antenna and its walls are provided with a thin metallic coating of sufficient thickness to carry the RF current produced by the propagation of electromagnetic waves through the dielectric.
- First and second waveguide sections are provided by means of a metallic septum for dividing the dielectric material. Energy coupling between the adjacent waveguide sections is significantly reduced by means of a microwave resistive material secured to the edge of the dividing septum. Side lobe patterns are significantly reduced by applying corrugations to the two tapered walls to achieve a slow wave structure.
- FIG. 1 is a perspective view, partially cut away, of a dual I horn antenna in accordance with this invention.
- the dual waveguide horn antenna comprises a rigid foam dielectric material 10 whose dielectric constant approximates that of air.
- the foam 10 is shaped as a conventional horn antenna having two tapered walls 11 and 12, and two parallel walls 13 and 14. Each of these walls is coated with a thin metallic copper plating of sufficient thickness to carry the RF current produced by the propagation of the electromagnetic waves through the dielectric.
- Electromagnetic energy is applied to the antenna at its tapered end by means of a pair of coaxial inputs 20 and 21, and an electromagnetic window 22 is located at the enlarged end of the horn antenna.
- the window may comprise material which is transparent to the electromagnetic energy, or it may simply be a portion of unplated dielectric.
- corrugations 15 and-l6 are applied to tapered walls 11 and 12 in order to achieve aslow wave structure. These corrugations have the effect of substantially reducing diffraction and scattering at the edges of the horn as well as significantly reducing the side lobes and back radiation in the E-plane pattern.
- the horn antenna is divided into first and second waveguide sections, thereby providing a dual horn antenna, by means of a metallic septum 17 which is located halfway between the two corrugated walls 15 and 16 in the H-plane.
- the septum extends over the entire longitudinal area of the dielectric between the coaxial inputs'20 and 21 and the output window 22.
- the incorporation of such a septum into a horn antenna of the type shown has the effect of reducing the standard Xband waveguide to two half-height waveguides.
- Each of these waveguides is separately fed from one of the two miniature coaxial inputs 20 and 21. Electromagnetic energy flowing in each section of the dual waveguide horn antenna will cause electrical currents to be conducted at the two opposing surfaces of the septum 17.
- the microwave resistive strip may be applied in a number of different ways.- One way would be to paint the edge surface of the septum with the resistive film or to apply the resistive film to the surface by means of vacuum deposition. Additionally, one may employ a carbonized substrate securely attached to the terminal portion of the septum. Finally, the resistive strip may comprise a thin insulating material which is secured to the terminal portion of the septum and a resistive coating applied to one or both sides of the insulating material. Suitable resistive materials may comprise nichrome or Synthane. The thickness of the coating as well as the area covered would depend upon a variety of factors such as the intensity of the radiation beam, the type, of dielectric employed as well as other factors which wouldbe well known to those persons skilled in the art.
- FIG. 2 illustrates the radiation patterns of the dual waveguide horn antenna used as a monopulse antenna.
- the sum and difference patterns are shown. It will be noted that the sum pattern has a high gain and essentially no side lobes.
- FIG. 3 illustrates the E-plane pattern of one section of the dual horn antenna.
- the foam dielectric material for use in this invention may typically comprise expanded polystyrene and polyurethane. These materials typically have a dielectric constant of l.05 and a loss tangent of 0.0004, thereby approximating the characteristics of air. Additionally, they are extremely lightweight, having a density of about 4 pounds per cubic foot.
- the walls of the dielectric waveguide as well as the septum are copper plated to a thickness of about 0.005 inches. The technique of copper plating is disclosed in copending application Ser. No. 739,578 filed Apr. 16, 1968.
- a dual waveguide horn antenna comprising:
- a rigid foam dielectric material having a dielectric constant approximately equal to that of air and having tapered walls to conform to the shape of a conventional horn antenna
- a thin metallic coating covering the walls of the dielectric, said coating having sufiicient thickness to carry the RF current produced by the propagation of an electromagnetic wave through said dielectric;
- the antenna of claim 1 further comprising means for reducing energy coupling between said first and second waveguide sections.
- said means for reducing energy coupling comprises a microwave resistive material secured to said septum and located at the enlarged end of said dielectric.
- said resistive strip comprises a thin film resistive material secured to the surface of said septum by vacuum deposition.
- said resistive strip comprises an insulating strip secured to the edge of said septum and a microwave resistive coating on said insulating strip.
Abstract
A dual waveguide horn antenna is provided with a rigid foam having a dielectric constant approximately equal to that of air and tapered to conform to the shape of a conventional horn antenna. Two tapered walls are corrugated and all four walls are covered with a thin metallic coating of sufficient thickness to carry the RF current produced by the propogation of an electromagnetic wave through the dielectric. A metallic septum divides the dielectric into first and second waveguide sections and individual coaxial inputs are provided to each of the sections. Energy coupling between the two sections of the waveguide are significantly reduced by means of a microwave resistive material secured to the septum at the enlarged end of the dielectric. The resistive strip may comprise a carbonized substrate or an insulating material coated with the resistive film. Additionally, a thin film of paint may be applied directly to the metallic septum by various techniques including vacuum deposition.
Description
United States Patent [72] Inventor Howard S. Jones, Jr.
Washington, D.C.
[21 Appl. No. 47,504
[22] Filed June 18, 1970 [45] Patented Oct. 5, 1971 The United States of America as represented by the Secretary of the Army [73] Assignee [54] DUAL WAVEGUIDE HORN ANTENNA [56] References Cited UNITED STATES PATENTS 3,055,004 9/1962 Cutler 343/786 Primary Examiner-Eli Lieberman AttorneysHarry M. Saragovitz, Edward J. Kelly, Herbert Berl and Saul Elbaum ABSTRACT: A dual waveguide horn antenna is provided with a rigid foam having a dielectric constant approximately equal to that of air and tapered to conform to the shape of a conventional horn antenna. Two tapered walls are corrugated and all four walls are covered with a thin metallic coating of sufficient thickness to carry the RF current produced by the propogation of an electromagnetic wave through the dielectric. A metallic septum divides the dielectric into first and second waveguide sections and individual coaxial inputs are provided to each of the sections. Energy coupling between the two sections of the waveguide are significantly reduced by means of a microwave resistive material secured to the septum at the enlarged end of the dielectric. The resistive strip may comprise a carbonized substrate or an insulating material coated with the resistive film. Additionally, a thin film of paint may be applied directly to the metallic septum by various techniques including vacuum deposition.
'PATENTED am sml 351L396 SUM PATTERN E- PLANE prm'erzu D\FFERENCE PATTEQN /6. Z DUAL SECTON H6. 3 smeua sscnou wvsuraxa flan 420.5. JONES, Je,
DUAL WAVEGUIDE I-IORN ANTENNA RIGHTS OF THE GOVERNMENT The invention described herein may be manufactured, used, and licensed by or for the United States Government for governmental purposes without the payment to me of any royalty thereon.
BACKGROUND OF THE INVENTION This invention relates generally to electromagnetic horn antennas, and more particularly to a dual waveguide horn antenna utilizing a lightweight foam material whose dielectric constant approximates that of air.
Conventional electromagnetic horn designs are usually constructed from sheet metal such s brass or aluminum and suitably shaped to achieve a desired radiation pattern. The disadvantages inherent in such systems are that they tend to be very heavy and quite expensive. Furthermore, any attempt at modification of the'basic design in order to attain a change in performance results in still more complex and bulky structures, thereby adding further to their expense. Additionally, the E-plane radiation pattern of horns designed and constructed in the conventional'manner have inherently high side lobes, a high degree of energy coupling between adjacent waveguide sections as well as other undesirable radiation pattern characteristics.
It is, therefore, a primary object of this invention to provide a dual waveguide horn antenna which is extremely lightweight, inexpensive, highly efiicient and capable of performing a number of functions in electronic and radar systems.
Another object of the invention is to provide a horn antenna which is easy and inexpensive to construct as well as to modify.
Yet another object is to provide a dual waveguide horn antenna having high gain and low side lobes.
Still another object is to provide a dual waveguide horn antenna in which the coupling of energy between adjacent waveguide sections in significantly reduced.
SUMMARY OF THE INVENTION Briefly, in accordance with this invention, a dual waveguide antenna is provided with a rigid foam material whose dielectric constant approximates that of air. The dielectric is tapered to conform to the shape of a conventional horn antenna and its walls are provided with a thin metallic coating of sufficient thickness to carry the RF current produced by the propagation of electromagnetic waves through the dielectric. First and second waveguide sections are provided by means of a metallic septum for dividing the dielectric material. Energy coupling between the adjacent waveguide sections is significantly reduced by means of a microwave resistive material secured to the edge of the dividing septum. Side lobe patterns are significantly reduced by applying corrugations to the two tapered walls to achieve a slow wave structure.
BRIEF DESCRIPTION OF THE DRAWINGS The specific nature of the invention as well as other objects, aspects, uses, and advantages thereof will clearly appear from the following description and from the accompanying drawings, in which:
FIG. 1 is a perspective view, partially cut away, of a dual I horn antenna in accordance with this invention.
DESCRIPTION OF THE PREFERRED EMBODIMENTS Referring now to FIG. I, the dual waveguide horn antenna comprises a rigid foam dielectric material 10 whose dielectric constant approximates that of air. The foam 10 is shaped as a conventional horn antenna having two tapered walls 11 and 12, and two parallel walls 13 and 14. Each of these walls is coated with a thin metallic copper plating of sufficient thickness to carry the RF current produced by the propagation of the electromagnetic waves through the dielectric. Electromagnetic energy is applied to the antenna at its tapered end by means of a pair of coaxial inputs 20 and 21, and an electromagnetic window 22 is located at the enlarged end of the horn antenna. The window may comprise material which is transparent to the electromagnetic energy, or it may simply be a portion of unplated dielectric. corrugations 15 and-l6 are applied to tapered walls 11 and 12 in order to achieve aslow wave structure. These corrugations have the effect of substantially reducing diffraction and scattering at the edges of the horn as well as significantly reducing the side lobes and back radiation in the E-plane pattern.
The horn antenna is divided into first and second waveguide sections, thereby providing a dual horn antenna, by means of a metallic septum 17 which is located halfway between the two corrugated walls 15 and 16 in the H-plane. The septum extends over the entire longitudinal area of the dielectric between the coaxial inputs'20 and 21 and the output window 22. The incorporation of such a septum into a horn antenna of the type shown has the effect of reducing the standard Xband waveguide to two half-height waveguides. Each of these waveguides is separately fed from one of the two miniature coaxial inputs 20 and 21. Electromagnetic energy flowing in each section of the dual waveguide horn antenna will cause electrical currents to be conducted at the two opposing surfaces of the septum 17. These currents, upon reaching the edge 23 of septum l7 willtend to cross over to the other side, thereby coupling energy from one section to the other. In order to prevent this cross-coupling, a microwave resistive material 18 is secured to septum 17 near its edge 23. Any electrical currents flowing along the surface of the septum will be dissipated into heat upon traversing the resistive material 18. Accordingly little or no energy will be coupled between the two sections of the antenna. Decoupling figures in excess of 30 db can be expected from the use of this resistive element. This represents a 10 to 15 db improvement over the use of a metallic septum without a resistive strip as herein described.
The microwave resistive strip may be applied in a number of different ways.- One way would be to paint the edge surface of the septum with the resistive film or to apply the resistive film to the surface by means of vacuum deposition. Additionally, one may employ a carbonized substrate securely attached to the terminal portion of the septum. Finally, the resistive strip may comprise a thin insulating material which is secured to the terminal portion of the septum and a resistive coating applied to one or both sides of the insulating material. Suitable resistive materials may comprise nichrome or Synthane. The thickness of the coating as well as the area covered would depend upon a variety of factors such as the intensity of the radiation beam, the type, of dielectric employed as well as other factors which wouldbe well known to those persons skilled in the art.
The radiation patterns of the dual waveguide horn antenna used as a monopulse antenna is shown in FIG. 2. The sum and difference patterns are shown. It will be noted that the sum pattern has a high gain and essentially no side lobes. FIG. 3 illustrates the E-plane pattern of one section of the dual horn antenna.
The foam dielectric material for use in this invention may typically comprise expanded polystyrene and polyurethane. These materials typically have a dielectric constant of l.05 and a loss tangent of 0.0004, thereby approximating the characteristics of air. Additionally, they are extremely lightweight, having a density of about 4 pounds per cubic foot. The walls of the dielectric waveguide as well as the septum are copper plated to a thickness of about 0.005 inches. The technique of copper plating is disclosed in copending application Ser. No. 739,578 filed Apr. 16, 1968.
i wish it to be understood that I do not desire to be limited to the exact details of construction shown and described, for obvious modifications will occur to a person skilled in the art.
I claim as my invention:
1. A dual waveguide horn antenna comprising:
a. a rigid foam dielectric material having a dielectric constant approximately equal to that of air and having tapered walls to conform to the shape of a conventional horn antenna;
b. a thin metallic coating covering the walls of the dielectric, said coating having sufiicient thickness to carry the RF current produced by the propagation of an electromagnetic wave through said dielectric;
c. a metallic septum for dividing said dielectric into first and second waveguide sections;
d. an electromagnetic window located at the enlarged end of said tapered dielectric foam; and
e. means for applying electromagnetic energy to the tapered end of said dielectric.
2. The antenna of claim 1 wherein two of said tapered walls are corrugated to provide a slow wave structure.
3. The antenna of claim 1 wherein said thin metallic coating and said metallic septum comprise copper plating.
4. The antenna of claim 1 further comprising means for reducing energy coupling between said first and second waveguide sections.
5. The antenna of claim 4 wherein said means for reducing energy coupling comprises a microwave resistive material secured to said septum and located at the enlarged end of said dielectric.
6. The antenna of claim 5 wherein said resistive strip comprises a thin film resistive material secured to the surface of said septum by vacuum deposition.
7. The antenna of claim 5 wherein said resistive strip comprises a thin film paint on the surface of said septum.
8. The antenna of claim 5 wherein said resistive strip comprises a carbonized substrate.
9. The antenna of claim 5 wherein said resistive strip comprises an insulating strip secured to the edge of said septum and a microwave resistive coating on said insulating strip.
10. The antenna of claim 1 wherein said metallic septum equally divides said upper and lower waveguide sections.
Claims (10)
1. A dual waveguide horn antenna comprising: a. a rigid foam dielectric material having a dielectric constant approximately equal to that of air and having tapered walls to conform to the shape of a conventional horn antenna; b. a thin metallic coating covering the walls of the dielectric, said coating having sufficient thickness to carry the RF current produced by the propagation of an electromagnetic wave through said dielectric; c. a metallic septum for dividing said dielectric into first and second waveguide sections; d. an electromagnetic window located at the enlarged end of said tapered dielectric foam; and e. means for applying electromagnetic energy to the tapered end of said dielectric.
2. The antenna of claim 1 wherein two of said tapered walls are corrugated to provide a slow wave structure.
3. The antenna of claim 1 wherein said thin metallic coating and said metallic septum comprise copper plating.
4. The antenna of claim 1 further comprising means for reducing energy coupling between said first and second waveguide sections.
5. The antenna of claim 4 wherein said means for reducing energy coupling comprises a microwave resistive material secured to said septum and located at the enlarged end of said dielectric.
6. The antenna of claim 5 wherein said resistive strip comprises a thin film resistive material secured to the surface of said septum by vacuum deposition.
7. The antenna of claim 5 wherein said resistive strip comprises a thin film paint on the surface of said septum.
8. The antenna of claim 5 wherein said resistive strip comprises a carbonized substrate.
9. The antenna of claim 5 wherein said resistive strip comprises an insulating strip secured to the edge of said septum and a microwave resistive coating on said insulating strip.
10. The antenna of claim 1 wherein said metallic septum equally divides said upper and lower waveguide sections.
Applications Claiming Priority (1)
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US4750470A | 1970-06-18 | 1970-06-18 |
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Cited By (27)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3754273A (en) * | 1970-10-24 | 1973-08-21 | Mitsubishi Electric Corp | Corrugated waveguide |
US4047180A (en) * | 1976-06-01 | 1977-09-06 | Gte Sylvania Incorporated | Broadband corrugated horn antenna with radome |
US4086591A (en) * | 1976-09-28 | 1978-04-25 | Raytheon Company | Small aperture antenna |
JPS5432951A (en) * | 1977-08-19 | 1979-03-10 | Maspro Denko Kk | Electromagnetic horn antenna |
WO1980001461A1 (en) * | 1979-01-11 | 1980-07-24 | Bsd Medical Corp | Apparatus for electromagnetic radiation of living tissue and the like |
EP0059927A1 (en) * | 1981-03-07 | 1982-09-15 | ANT Nachrichtentechnik GmbH | Microwave receiving arrangement |
US4568943A (en) * | 1983-05-31 | 1986-02-04 | Rca Corporation | Antenna feed with mode conversion and polarization conversion means |
US4811027A (en) * | 1985-02-06 | 1989-03-07 | Eltro Gmbh | Broad-band directional antenna |
US4811028A (en) * | 1987-01-20 | 1989-03-07 | Avco Corporation | Quadridge antenna for space vehicle |
US4885593A (en) * | 1986-09-18 | 1989-12-05 | Scientific-Atlanta, Inc. | Feeds for compact ranges |
US4897663A (en) * | 1985-12-25 | 1990-01-30 | Nec Corporation | Horn antenna with a choke surface-wave structure on the outer surface thereof |
DE4001952A1 (en) * | 1990-01-24 | 1991-08-08 | Siemens Ag | Double exciter for reflector antenna - has dielectric region with low dielectric constant |
US5051748A (en) * | 1988-08-03 | 1991-09-24 | Centre National De La Recherche Scientifique | Device for transmitting and receiving microwave radiation, for forming images of buried objects |
US5426443A (en) * | 1994-01-18 | 1995-06-20 | Jenness, Jr.; James R. | Dielectric-supported reflector system |
US5451970A (en) * | 1992-05-28 | 1995-09-19 | Cole; Carroll R. | Radar antenna unit having a plurality of heat dissipating fins forming on the exterior of a cone shaped chamber |
US5543814A (en) * | 1995-03-10 | 1996-08-06 | Jenness, Jr.; James R. | Dielectric-supported antenna |
US5640168A (en) * | 1995-08-11 | 1997-06-17 | Zircon Corporation | Ultra wide-band radar antenna for concrete penetration |
US5963176A (en) * | 1997-04-14 | 1999-10-05 | The United States As Represented By The Secretary Of Commerce | Antenna system with edge treatment means for diminishing antenna transmitting and receiving diffraction, sidelobes, and clutter |
US6075495A (en) * | 1995-11-07 | 2000-06-13 | Podgorski; Andrew S. | Broadband TEM-horn antenna |
US6297783B1 (en) * | 1997-12-29 | 2001-10-02 | Celsiustech Electronics Ab | Antenna arrangement and a method in connection with the antenna arrangement |
US20030210196A1 (en) * | 2002-05-08 | 2003-11-13 | Manasson Vladimir A. | Dielectric waveguide antenna with improved input wave coupler |
FR2845526A1 (en) * | 2002-10-07 | 2004-04-09 | Thomson Licensing Sa | METHOD FOR MANUFACTURING A MICROWAVE ANTENNA IN WAVEGUIDE TECHNOLOGY |
US6759992B2 (en) | 2002-02-12 | 2004-07-06 | Andrew Corporation | Pyramidal-corrugated horn antenna for sector coverage |
US20040233117A1 (en) * | 2003-05-23 | 2004-11-25 | Milroy William W. | Variable inclination continuous transverse stub array |
EP1706915A1 (en) * | 2004-01-20 | 2006-10-04 | Endress u. Hauser GmbH u.Co. KG | Microwave guiding arrangement |
US20080048923A1 (en) * | 2006-08-23 | 2008-02-28 | Nextel Communications, Inc. | Multiple band antenna arrangement |
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-
1970
- 1970-06-18 US US47504A patent/US3611396A/en not_active Expired - Lifetime
Cited By (42)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3754273A (en) * | 1970-10-24 | 1973-08-21 | Mitsubishi Electric Corp | Corrugated waveguide |
US4047180A (en) * | 1976-06-01 | 1977-09-06 | Gte Sylvania Incorporated | Broadband corrugated horn antenna with radome |
US4086591A (en) * | 1976-09-28 | 1978-04-25 | Raytheon Company | Small aperture antenna |
JPS5432951A (en) * | 1977-08-19 | 1979-03-10 | Maspro Denko Kk | Electromagnetic horn antenna |
WO1980001461A1 (en) * | 1979-01-11 | 1980-07-24 | Bsd Medical Corp | Apparatus for electromagnetic radiation of living tissue and the like |
US4271848A (en) * | 1979-01-11 | 1981-06-09 | Bio Systems Design, Corp. | Apparatus for electromagnetic radiation of living tissue and the like |
EP0059927A1 (en) * | 1981-03-07 | 1982-09-15 | ANT Nachrichtentechnik GmbH | Microwave receiving arrangement |
US4498061A (en) * | 1981-03-07 | 1985-02-05 | Licentia Patent-Verwaltungs-Gmbh | Microwave receiving device |
US4568943A (en) * | 1983-05-31 | 1986-02-04 | Rca Corporation | Antenna feed with mode conversion and polarization conversion means |
US4811027A (en) * | 1985-02-06 | 1989-03-07 | Eltro Gmbh | Broad-band directional antenna |
US4897663A (en) * | 1985-12-25 | 1990-01-30 | Nec Corporation | Horn antenna with a choke surface-wave structure on the outer surface thereof |
US4885593A (en) * | 1986-09-18 | 1989-12-05 | Scientific-Atlanta, Inc. | Feeds for compact ranges |
US4811028A (en) * | 1987-01-20 | 1989-03-07 | Avco Corporation | Quadridge antenna for space vehicle |
US5051748A (en) * | 1988-08-03 | 1991-09-24 | Centre National De La Recherche Scientifique | Device for transmitting and receiving microwave radiation, for forming images of buried objects |
DE4001952A1 (en) * | 1990-01-24 | 1991-08-08 | Siemens Ag | Double exciter for reflector antenna - has dielectric region with low dielectric constant |
US5451970A (en) * | 1992-05-28 | 1995-09-19 | Cole; Carroll R. | Radar antenna unit having a plurality of heat dissipating fins forming on the exterior of a cone shaped chamber |
US5426443A (en) * | 1994-01-18 | 1995-06-20 | Jenness, Jr.; James R. | Dielectric-supported reflector system |
US5543814A (en) * | 1995-03-10 | 1996-08-06 | Jenness, Jr.; James R. | Dielectric-supported antenna |
US5640168A (en) * | 1995-08-11 | 1997-06-17 | Zircon Corporation | Ultra wide-band radar antenna for concrete penetration |
US6075495A (en) * | 1995-11-07 | 2000-06-13 | Podgorski; Andrew S. | Broadband TEM-horn antenna |
US5963176A (en) * | 1997-04-14 | 1999-10-05 | The United States As Represented By The Secretary Of Commerce | Antenna system with edge treatment means for diminishing antenna transmitting and receiving diffraction, sidelobes, and clutter |
US6297783B1 (en) * | 1997-12-29 | 2001-10-02 | Celsiustech Electronics Ab | Antenna arrangement and a method in connection with the antenna arrangement |
US6759992B2 (en) | 2002-02-12 | 2004-07-06 | Andrew Corporation | Pyramidal-corrugated horn antenna for sector coverage |
US6750827B2 (en) * | 2002-05-08 | 2004-06-15 | Waveband Corporation | Dielectric waveguide antenna with improved input wave coupler |
US20030210196A1 (en) * | 2002-05-08 | 2003-11-13 | Manasson Vladimir A. | Dielectric waveguide antenna with improved input wave coupler |
JP2006502612A (en) * | 2002-10-07 | 2006-01-19 | トムソン ライセンシング | Method for manufacturing a waveguide microwave antenna |
WO2004032278A2 (en) * | 2002-10-07 | 2004-04-15 | Thomson Licensing S.A. | Method for making a waveguide microwave antenna |
WO2004032278A3 (en) * | 2002-10-07 | 2004-08-05 | Thomson Licensing Sa | Method for making a waveguide microwave antenna |
FR2845526A1 (en) * | 2002-10-07 | 2004-04-09 | Thomson Licensing Sa | METHOD FOR MANUFACTURING A MICROWAVE ANTENNA IN WAVEGUIDE TECHNOLOGY |
US20070096986A1 (en) * | 2002-10-07 | 2007-05-03 | Ali Louzir | Method for making a waveguide microwave antenna |
US7934308B2 (en) | 2002-10-07 | 2011-05-03 | Thomson Licensing | Method for making a waveguide microwave antenna |
US20040233117A1 (en) * | 2003-05-23 | 2004-11-25 | Milroy William W. | Variable inclination continuous transverse stub array |
US6919854B2 (en) * | 2003-05-23 | 2005-07-19 | Raytheon Company | Variable inclination continuous transverse stub array |
EP1706915A1 (en) * | 2004-01-20 | 2006-10-04 | Endress u. Hauser GmbH u.Co. KG | Microwave guiding arrangement |
US7616165B2 (en) * | 2006-08-23 | 2009-11-10 | Nextel Communications, Inc. | Multiple band antenna arrangement |
US20080048923A1 (en) * | 2006-08-23 | 2008-02-28 | Nextel Communications, Inc. | Multiple band antenna arrangement |
CN103682629A (en) * | 2012-09-25 | 2014-03-26 | 罗斯蒙特储罐雷达股份公司 | Two-channel directional antenna and a radar level gauge with such an antenna |
US20140085129A1 (en) * | 2012-09-25 | 2014-03-27 | Rosemount Tank Radar Ab | Two-channel directional antenna and a radar level gauge with such an antenna |
WO2014051481A1 (en) | 2012-09-25 | 2014-04-03 | Rosemount Tank Radar Ab | A two-channel directional antenna and a radar level gauge with such an antenna |
US8933835B2 (en) * | 2012-09-25 | 2015-01-13 | Rosemount Tank Radar Ab | Two-channel directional antenna and a radar level gauge with such an antenna |
EP2901524A4 (en) * | 2012-09-25 | 2016-05-25 | Rosemount Tank Radar Ab | A two-channel directional antenna and a radar level gauge with such an antenna |
CN103682629B (en) * | 2012-09-25 | 2018-05-18 | 罗斯蒙特储罐雷达股份公司 | Two-way directional aerial and the radar level gauge with this antenna |
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