GB882134A - Improvements in or relating to directional aerical systems - Google Patents
Improvements in or relating to directional aerical systemsInfo
- Publication number
- GB882134A GB882134A GB29120/59A GB2912059A GB882134A GB 882134 A GB882134 A GB 882134A GB 29120/59 A GB29120/59 A GB 29120/59A GB 2912059 A GB2912059 A GB 2912059A GB 882134 A GB882134 A GB 882134A
- Authority
- GB
- United Kingdom
- Prior art keywords
- guide
- beams
- phase
- beam directed
- radiate
- 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
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
- H01Q13/0233—Horns fed by a slotted waveguide array
Landscapes
- Radar Systems Or Details Thereof (AREA)
- Variable-Direction Aerials And Aerial Arrays (AREA)
- Aerials With Secondary Devices (AREA)
Abstract
882,134. Aerials and radar. DECCA RECORD CO. Ltd. Aug. 22, 1960 [Aug. 25. 1959], No. 29120/59. Class 40(7). A directional aerial system comprises a length of square or rectangular waveguide in each of two forces of which is a series of radiating slots, the two series differing in their phase and/or amplitude characteristics to produce beams in different directions. Such a system for use in an airborne Doppler navigational equipment may radiate or receive over each of two pairs of simultaneous beams alternately, one pair being a beam directed forward and to port together with another beam directed after and to starboard, the other pair being a beam directed forward and to starboard with a second beam directed after and to port, so that ground speed and drift may be determined. The system comprises a waveguide 10, Fig. 1, in two opposite faces of which is a multiplicity of radiating slots, those in one face being a phased array and those in the other an anti-phased array (i.e. if fed in phase adjacent slots of the array in 11 would radiate in phase whereas adjacent slots in 12 would radiate in anti-phase), so that two beams are produced, one inclined forward and the other backward to the axis of the guide. By alternately feeding the guide from opposite ends the alternate pairs of simultaneous beams are produced and a suitable feed system comprises a transmitter 20, Fig. 3, and a receiver 21 coupled by a duplexer 22 and switches 24 to the guide 10 with matched loads 25 connected by the switches to the unfed end of the guide. The aerial system is mounted with the axis of the guide horizontal and the beams are directed downwards by parabolic cylindrical reflectors 18, Fig. 1, formed from the upper plate of a flared parallel plate transmission line 16. The aerial system may be carried on either a fully or pitch stabilized mounting and may be aligned with its axis parallelto the fore and aft direction of the aircraft or be rotatable to be aligned with the direction of travel. The aerial system may also be used for ground radar applications.
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB29120/59A GB882134A (en) | 1959-08-25 | 1959-08-25 | Improvements in or relating to directional aerical systems |
| FR836579A FR1283170A (en) | 1959-08-25 | 1960-08-24 | Improvements to directional antenna devices |
| US51952A US3137001A (en) | 1959-08-25 | 1960-08-25 | Slotted waveguide array with parabolic reflectors and lobe switching |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB29120/59A GB882134A (en) | 1959-08-25 | 1959-08-25 | Improvements in or relating to directional aerical systems |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB882134A true GB882134A (en) | 1961-11-15 |
Family
ID=10286477
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB29120/59A Expired GB882134A (en) | 1959-08-25 | 1959-08-25 | Improvements in or relating to directional aerical systems |
Country Status (2)
| Country | Link |
|---|---|
| US (1) | US3137001A (en) |
| GB (1) | GB882134A (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CA1238714A (en) * | 1984-09-03 | 1988-06-28 | Hajime Seki | Shaped beam antenna |
Family Cites Families (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2573746A (en) * | 1945-09-19 | 1951-11-06 | Honorary Advisory Council Sci | Directive antenna for microwaves |
| US2834014A (en) * | 1950-02-16 | 1958-05-06 | Thorne Thomas George | Aerial systems |
| US2730717A (en) * | 1951-04-18 | 1956-01-10 | Katchky Max | Directional wave antenna for marine radar use |
| BE511669A (en) * | 1951-07-25 | |||
| GB691586A (en) * | 1951-12-20 | 1953-05-13 | Otto Moritz Bohm | Improvements in radio or radar aerials |
| GB725386A (en) * | 1952-05-21 | 1955-03-02 | Telefunken Gmbh | Improvements in or relating to aerials |
| US2764756A (en) * | 1952-11-13 | 1956-09-25 | Gen Precision Lab Inc | Microwave lobe shifting antenna |
| US3039097A (en) * | 1953-08-17 | 1962-06-12 | Hughes Aircraft Co | Frequency-sensitive rapid-scanning antenna |
| US3044066A (en) * | 1955-06-06 | 1962-07-10 | Sanders Associates Inc | Three conductor planar antenna |
| US2908904A (en) * | 1955-08-26 | 1959-10-13 | Hughes Aircraft Co | Antenna system |
| US2932823A (en) * | 1956-09-26 | 1960-04-12 | Marconi Wireless Telegraph Co | Selective directional slotted wave guide antenna |
| US2911644A (en) * | 1956-11-30 | 1959-11-03 | Gen Precision Lab Inc | Doppler radio antenna |
| FR1200570A (en) * | 1957-07-24 | 1959-12-22 | Marconi Wireless Telegraph Co | Advanced aerial system |
-
1959
- 1959-08-25 GB GB29120/59A patent/GB882134A/en not_active Expired
-
1960
- 1960-08-25 US US51952A patent/US3137001A/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| US3137001A (en) | 1964-06-09 |
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