GB874656A - Improvements in or relating to cross polarized dual feeds - Google Patents
Improvements in or relating to cross polarized dual feedsInfo
- Publication number
- GB874656A GB874656A GB25954/57A GB2595457A GB874656A GB 874656 A GB874656 A GB 874656A GB 25954/57 A GB25954/57 A GB 25954/57A GB 2595457 A GB2595457 A GB 2595457A GB 874656 A GB874656 A GB 874656A
- Authority
- GB
- United Kingdom
- Prior art keywords
- slots
- outer conductor
- conductor
- cavity
- conductors
- 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 16
- 239000012212 insulator Substances 0.000 abstract 1
- 230000005855 radiation Effects 0.000 abstract 1
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q19/00—Combinations of primary active antenna elements and units with secondary devices, e.g. with quasi-optical devices, for giving the antenna a desired directional characteristic
- H01Q19/10—Combinations of primary active antenna elements and units with secondary devices, e.g. with quasi-optical devices, for giving the antenna a desired directional characteristic using reflecting surfaces
- H01Q19/12—Combinations of primary active antenna elements and units with secondary devices, e.g. with quasi-optical devices, for giving the antenna a desired directional characteristic using reflecting surfaces wherein the surfaces are concave
- H01Q19/13—Combinations of primary active antenna elements and units with secondary devices, e.g. with quasi-optical devices, for giving the antenna a desired directional characteristic using reflecting surfaces wherein the surfaces are concave the primary radiating source being a single radiating element, e.g. a dipole, a slot, a waveguide termination
- H01Q19/134—Rear-feeds; Splash plate feeds
- H01Q19/136—Rear-feeds; Splash plate feeds cross-polarised
Landscapes
- Aerials With Secondary Devices (AREA)
- Variable-Direction Aerials And Aerial Arrays (AREA)
Abstract
874,656. Aerials. ANDREW CORPORATION. Aug. 16, 1957 [Oct. 10, 1956], No. 25954/57. Class 40(7) [Also in Group XL(b) ] A feed element for an aerial, e.g. a parabolic aerial, comprises outer, intermediate, and inner conductors extending into a cavity having a surface of revolution and an open end which faces the directive element, the cavity and the conductors being coaxial. The feed element will receive and/or transmit cross-polarized signals on the same or different frequencies simultaneously. In one embodiment a cavity member 14, Figs. 1 and 2, has isolating fins 21, 22 mounted on the outer conductor 13 of a feed line which consists of three conductors, 11, 12, 13. The member 17 is transparent to the waves radiated or received by the aerial and is placed at the focal point of the reflector or lens. Tuned pairs of slots 24, 25 and 27, 28 are provided in the outer conductor, one pair being in the front part 18 and one in the rear part 20 of cavity 14. The intermediate 12 and inner 11 conductors of the feed line are shaped as shown, connections 29 and 26 connecting the respective conductors to the outer conductor 13. The cavity parts 18 and 20 may be tuned to the same or different frequencies and the radiations emitted will be cross polarized due to the positioning of the tuned slots. The slots may be loaded by dipoles for impedance matching. In a second embodiment the feed element has no isolating fins. In Figs. 8 and 10 the outer conductor 13 has a pair of slots 38, 39, and the intermediate conductor 12 a pair of slots 43, 44. Loading dipole elements 34, 36 are provided on the intermediate conductor and mounted in insulators 35, 37, and dipole elements 40, 41 are mounted direct on the outer conductor 13. In a further embodiment, Fig. 12, the outer conductor has slots 51, 52 loaded with dipole elements 45 (only one shown), and a further pair of slots 47 (only one shown) with associated dipole elements 49, 50. The slots 51, 52 extend to the end of the outer conductor. In the last two forms of feed element each conductor is connected to its adjacent conductor.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US615199A US2954556A (en) | 1956-10-10 | 1956-10-10 | Cross polarized dual feed |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB874656A true GB874656A (en) | 1961-08-10 |
Family
ID=24464413
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB25954/57A Expired GB874656A (en) | 1956-10-10 | 1957-08-16 | Improvements in or relating to cross polarized dual feeds |
Country Status (2)
| Country | Link |
|---|---|
| US (1) | US2954556A (en) |
| GB (1) | GB874656A (en) |
Families Citing this family (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3417400A (en) * | 1966-04-25 | 1968-12-17 | Administrator Of The Nat Acron | Triaxial antenna |
| CH466383A (en) * | 1967-12-01 | 1968-12-15 | Patelhold Patentverwertung | Antenna for linearly polarized waves |
| US4011566A (en) * | 1975-07-25 | 1977-03-08 | The United States Of America As Represented By The Secretary Of The Air Force | In-line coax-to waveguide transition using dipole |
| US4197549A (en) * | 1977-08-17 | 1980-04-08 | Harris Corporation | Slot antenna |
| GB1595277A (en) * | 1978-05-09 | 1981-08-12 | Communications Patents Ltd | Antenna arrangements |
| US5003321A (en) * | 1985-09-09 | 1991-03-26 | Sts Enterprises, Inc. | Dual frequency feed |
| DE3735226A1 (en) * | 1987-10-17 | 1989-04-27 | Kabelmetal Electro Gmbh | DIPOLER FOR AN ANTENNA |
| US4907008A (en) * | 1988-04-01 | 1990-03-06 | Andrew Corporation | Antenna for transmitting circularly polarized television signals |
| US6522305B2 (en) | 2000-02-25 | 2003-02-18 | Andrew Corporation | Microwave antennas |
| US6784848B2 (en) * | 2001-10-29 | 2004-08-31 | Rf Technologies Corporation | Broad band slot style television broadcast antenna |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2422184A (en) * | 1944-01-15 | 1947-06-17 | Bell Telephone Labor Inc | Directional microwave antenna |
| US2556900A (en) * | 1948-02-24 | 1951-06-12 | Forrest L Buschhorn | Outboard motor lock |
| BE488912A (en) * | 1948-05-08 | |||
| US2660674A (en) * | 1948-10-14 | 1953-11-24 | Rca Corp | Slotted antenna system |
-
1956
- 1956-10-10 US US615199A patent/US2954556A/en not_active Expired - Lifetime
-
1957
- 1957-08-16 GB GB25954/57A patent/GB874656A/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| US2954556A (en) | 1960-09-27 |
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