GB817714A - Aerial assembly - Google Patents
Aerial assemblyInfo
- Publication number
- GB817714A GB817714A GB945056A GB945056A GB817714A GB 817714 A GB817714 A GB 817714A GB 945056 A GB945056 A GB 945056A GB 945056 A GB945056 A GB 945056A GB 817714 A GB817714 A GB 817714A
- Authority
- GB
- United Kingdom
- Prior art keywords
- main reflector
- march
- slots
- give
- narrow beam
- 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
- 101700073338 COLE Proteins 0.000 abstract 1
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q25/00—Antennas or antenna systems providing at least two radiating patterns
- H01Q25/001—Crossed polarisation dual antennas
Landscapes
- Variable-Direction Aerials And Aerial Arrays (AREA)
- Aerials With Secondary Devices (AREA)
Abstract
817,714. Aerials. COLE Ltd., E. K., and ROBINSON, A. G. G. H. March 26, 1957 [March 27, 1956], No. 9450/56. Class 40 (7). An aerial system intended for an airborne radar has two alternative radiation patterns which may be respectively a narrow beam and a cosecant-squared beam. The system consists of a primary element, which may be a waveguide fed dipole, mounted at the focal point of a main reflector such as B, which may be paraboloidal, to give a narrow beam pattern. The main reflector is provided with slots as shown which extend parallel to the electric vector of the incident energy. Through these slots may be inserted parallel plates separated by less than half the working wavelength, and having their front edges contoured to give the second radiation pattern. The plates may either be pivoted as at D so that they turn about an axis at the edge of the main reflector when moved from their operative to their inoperative position and vice versa, or they may be arranged to slide.
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB817714A true GB817714A (en) | 1959-08-06 |
Family
ID=1629819
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB945056A Expired GB817714A (en) | 1956-03-27 | Aerial assembly |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB817714A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2268834A (en) * | 1980-12-04 | 1994-01-19 | Racal Mesl Ltd | Radar arrangements and methods |
| DE19952516A1 (en) * | 1999-10-30 | 2001-06-07 | Daimler Chrysler Ag | Antenna has polarization dependent beam direction rotation of reflector allows scanning |
-
1956
- 1956-03-27 GB GB945056A patent/GB817714A/en not_active Expired
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2268834A (en) * | 1980-12-04 | 1994-01-19 | Racal Mesl Ltd | Radar arrangements and methods |
| GB2268834B (en) * | 1980-12-04 | 1994-06-22 | Racal Mesl Ltd | Radar arrangements and methods of detecting different types of targets |
| US5477224A (en) * | 1980-12-04 | 1995-12-19 | Racal (Newbridge) Limited | Radar arrangements and methods |
| DE19952516A1 (en) * | 1999-10-30 | 2001-06-07 | Daimler Chrysler Ag | Antenna has polarization dependent beam direction rotation of reflector allows scanning |
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