GB721098A - Improvements in and relating to dual frequency radio antennae - Google Patents
Improvements in and relating to dual frequency radio antennaeInfo
- Publication number
- GB721098A GB721098A GB13091/53A GB1309153A GB721098A GB 721098 A GB721098 A GB 721098A GB 13091/53 A GB13091/53 A GB 13091/53A GB 1309153 A GB1309153 A GB 1309153A GB 721098 A GB721098 A GB 721098A
- Authority
- GB
- United Kingdom
- Prior art keywords
- horn
- frequency
- wave
- waves
- flared
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
- 230000009977 dual effect Effects 0.000 title 1
- 239000004020 conductor Substances 0.000 abstract 3
- 230000005855 radiation Effects 0.000 abstract 3
- 230000005540 biological transmission Effects 0.000 abstract 2
- 239000000523 sample Substances 0.000 abstract 2
- 239000011324 bead Substances 0.000 abstract 1
- 230000010287 polarization Effects 0.000 abstract 1
- 230000011664 signaling Effects 0.000 abstract 1
Classifications
-
- 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
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q5/00—Arrangements for simultaneous operation of antennas on two or more different wavebands, e.g. dual-band or multi-band arrangements
- H01Q5/30—Arrangements for providing operation on different wavebands
- H01Q5/307—Individual or coupled radiating elements, each element being fed in an unspecified way
- H01Q5/342—Individual or coupled radiating elements, each element being fed in an unspecified way for different propagation modes
- H01Q5/35—Individual or coupled radiating elements, each element being fed in an unspecified way for different propagation modes using two or more simultaneously fed points
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q5/00—Arrangements for simultaneous operation of antennas on two or more different wavebands, e.g. dual-band or multi-band arrangements
- H01Q5/50—Feeding or matching arrangements for broad-band or multi-band operation
- H01Q5/55—Feeding or matching arrangements for broad-band or multi-band operation for horn or waveguide antennas
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q9/00—Electrically-short antennas having dimensions not more than twice the operating wavelength and consisting of conductive active radiating elements
- H01Q9/04—Resonant antennas
- H01Q9/06—Details
- H01Q9/08—Junction boxes specially adapted for supporting adjacent ends of collinear rigid elements
Landscapes
- Waveguide Aerials (AREA)
- Aerials With Secondary Devices (AREA)
Abstract
721,098. Multiplex radio signalling; directive radio systems. GENERAL ELECTRIC CO. May 11, 1953 [May 10, 1952], No. 13091/53. Classes 40 (5) and 40 (7). Waves of one frequency are launched into the throat of a horn and waves of a second frequency, and parallel polarization, are launched by means coupled through the sides of the horn, each exciting means including means for rejecting the waves of the other. In the embodiment described, the horn 11 is flared in the vertical direction only, the radiation of higher frequency F<SP>1</SP> being carried by a wave-guide 25 attached to the throat 13 and matched by an iris 27. The radiation of lower frequency F<SP>2</SP> is coupled to a transverse probe 29, supported by and coupled to filter sections 31, 33 that match its coaxial feeder to the horn and prevent the transmission of energy at frequency F<SP>1</SP>. The filters comprise coaxial line sections having uniform outer conductors 35, 37, a common inner conductor 39, supported by a dielectric bead 41 and shorting disc 43, portions 45 of the inner conductor being enlarged to provide the desired characteristics. The wave-guide 25 is below the critical size for conveying energy of frequency F<SP>2</SP>. To improve the directional pattern in the horizontal plane, flared conductive plates 47, 49 provide extensions of the flared side-pieces of the horn. A stepped dielectric lens 55 closing the horn mouth reduces undesired side lobes in the vertical pattern and enables the horn to be pressurized. To prevent distortion of the radiation pattern of frequency F<SP>1</SP> the length of probe 29 may be reduced by the provision of quarter-wave coaxial chokes at quarter-wave intervals. The horn may be used for transmission or reception at both frequencies.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US287128A US2719230A (en) | 1952-05-10 | 1952-05-10 | Dual frequency antenna |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB721098A true GB721098A (en) | 1954-12-29 |
Family
ID=23101573
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB13091/53A Expired GB721098A (en) | 1952-05-10 | 1953-05-11 | Improvements in and relating to dual frequency radio antennae |
Country Status (2)
| Country | Link |
|---|---|
| US (1) | US2719230A (en) |
| GB (1) | GB721098A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0014635A1 (en) * | 1979-02-02 | 1980-08-20 | Thomson-Csf | Dipole fed open cavity antenna |
Families Citing this family (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2828486A (en) * | 1955-05-23 | 1958-03-25 | Andrew Corp | Antenna feed system |
| US2898591A (en) * | 1955-05-31 | 1959-08-04 | Andrew Corp | Combination feed for reflector dish-type antenna |
| US2992429A (en) * | 1959-02-17 | 1961-07-11 | Antenna Systems Inc | Tapered aperture horn antenna for electromagnetic energy below 40 megacycles |
| US3935577A (en) * | 1974-09-11 | 1976-01-27 | Andrew Corporation | Flared microwave horn with dielectric lens |
| US4318103A (en) * | 1980-03-17 | 1982-03-02 | Comgeneral Corporation | Compact radar detector and range extender |
| US4660050A (en) * | 1983-04-06 | 1987-04-21 | Trw Inc. | Doppler radar velocity measurement horn |
| US4698638A (en) * | 1985-12-26 | 1987-10-06 | General Dynamics, Pomona Division | Dual mode target seeking system |
| US5228947A (en) * | 1990-07-23 | 1993-07-20 | Trus Joist Macmillan, A Limited Partnership | Microwave curing system |
| US5754144A (en) * | 1996-07-19 | 1998-05-19 | The Regents Of The University Of California | Ultra-wideband horn antenna with abrupt radiator |
| US6031504A (en) * | 1998-06-10 | 2000-02-29 | Mcewan; Thomas E. | Broadband antenna pair with low mutual coupling |
| EP2947716B8 (en) * | 2014-05-23 | 2023-08-09 | Progress Rail Signaling S.p.A. | Radar obstacle detector for a railway crossing |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2364371A (en) * | 1940-08-31 | 1944-12-05 | Rca Corp | Double polarization feed for horn antennas |
| US2408425A (en) * | 1941-04-04 | 1946-10-01 | Sperry Gyroscope Co Inc | Instrument landing system |
| US2425488A (en) * | 1943-07-03 | 1947-08-12 | Rca Corp | Horn antenna |
| US2438987A (en) * | 1944-05-23 | 1948-04-06 | Radio Transmission Equipment L | Radio navigational aid |
| US2547416A (en) * | 1946-12-19 | 1951-04-03 | Bell Telephone Labor Inc | Dielectric lens |
| US2514779A (en) * | 1947-05-14 | 1950-07-11 | Rca Corp | Wave guide system |
| US2669657A (en) * | 1949-11-19 | 1954-02-16 | Bell Telephone Labor Inc | Electromagnetic lens |
-
1952
- 1952-05-10 US US287128A patent/US2719230A/en not_active Expired - Lifetime
-
1953
- 1953-05-11 GB GB13091/53A patent/GB721098A/en not_active Expired
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0014635A1 (en) * | 1979-02-02 | 1980-08-20 | Thomson-Csf | Dipole fed open cavity antenna |
| FR2448230A1 (en) * | 1979-02-02 | 1980-08-29 | Thomson Csf | RADIANT SOURCE WITH OPEN CAVITY EXCITED BY A DIPOLE |
Also Published As
| Publication number | Publication date |
|---|---|
| US2719230A (en) | 1955-09-27 |
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