GB1023112A - Improvements in or relating to a microwave antenna - Google Patents
Improvements in or relating to a microwave antennaInfo
- Publication number
- GB1023112A GB1023112A GB18470/63A GB1847063A GB1023112A GB 1023112 A GB1023112 A GB 1023112A GB 18470/63 A GB18470/63 A GB 18470/63A GB 1847063 A GB1847063 A GB 1847063A GB 1023112 A GB1023112 A GB 1023112A
- Authority
- GB
- United Kingdom
- Prior art keywords
- waveguides
- slots
- directions
- turn
- slot
- 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
- H01Q21/00—Antenna arrays or systems
- H01Q21/0006—Particular feeding systems
- H01Q21/0037—Particular feeding systems linear waveguide fed arrays
- H01Q21/0043—Slotted waveguides
- H01Q21/005—Slotted waveguides arrays
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q25/00—Antennas or antenna systems providing at least two radiating patterns
- H01Q25/004—Antennas or antenna systems providing at least two radiating patterns providing two or four symmetrical beams for Janus application
Landscapes
- Variable-Direction Aerials And Aerial Arrays (AREA)
- Waveguide Aerials (AREA)
Abstract
1,023,112. Aerials. LABORATORY FOR ELECTRONICS Inc. May 9, 1963 [May 10 1962], No. 18470/63. Heading H4A. [Also in Division H1] The invention relates to an aerial for an airborne Doppler navigation system and provides a pencil beam which may be switched to a plurality of directions 11-14, Fig. 1 (not shown), inclined to, and symmetrical about, the vertical axis. The aerial comprises a plurality of identical waveguides 41, Fig. 2, each connected to a pair of feed waveguides 21, 22, by slots in these latter. Each of the waveguides 41 radiates through slots inclined to the longitudinal axis and the angle of inclination and depth of slot is varied along the guide such that the coupling coefficient g(n) of the nth slot from either end of the waveguide is given by g(n) = sin<SP>2</SP> + n#/N+1 + D N+1 where N is the total number of slots in the guide and D is an empirical constant. Such an arrangement gives an asymmetric tapered amplitude distribution providing a beam of suitable width and side lobe level. The coupling between the radiating waveguides 41 and the feed waveguides 21 and 22 is arranged in a corresponding manner. Formulae are derived for the variation of slot angle and depth, and to relate the spacing of the slots in the waveguides 41 and 21, 22, to the angles between the directions 11-14 and the X and Y axes. As described, the beam is switched in turn to only three of these directions by energizing in turn three of the four input ports 31-34 of the array, the fourth port being terminated in a matched load. A microwave switch (see Division H1) is described with reference to Fig. 5 (not shown) for connecting these three ports in turn to a common feed.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US193717A US3276026A (en) | 1962-05-10 | 1962-05-10 | Doppler array with plural slotted waveguides and feed switching |
Publications (1)
Publication Number | Publication Date |
---|---|
GB1023112A true GB1023112A (en) | 1966-03-16 |
Family
ID=22714747
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB18470/63A Expired GB1023112A (en) | 1962-05-10 | 1963-05-09 | Improvements in or relating to a microwave antenna |
Country Status (4)
Country | Link |
---|---|
US (1) | US3276026A (en) |
DE (1) | DE1441741A1 (en) |
FR (1) | FR1366047A (en) |
GB (1) | GB1023112A (en) |
Families Citing this family (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3524151A (en) * | 1968-01-09 | 1970-08-11 | Emerson Electric Co | Phased array transmission lens feed system |
NL160438C (en) * | 1968-10-18 | 1979-10-15 | Hollandse Signaalapparaten Bv | MICROWAVE ANTENNA. |
DE1962436C1 (en) | 1969-12-12 | 1984-05-24 | Siemens AG, 1000 Berlin und 8000 München | Doppler navigation radar antenna with automatic land-sea error correction due to differently inclined groups of lobes |
EP0190927A3 (en) * | 1985-02-07 | 1988-08-24 | National Research Development Corporation | Slotted waveguide antennas and arrays |
FR3121287A1 (en) * | 2021-03-25 | 2022-09-30 | Thales | MULTI-BEAM ANTENNA IN PROGRESSIVE MODE |
Family Cites Families (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB837091A (en) * | 1955-12-18 | 1960-06-09 | Decca Record Co Ltd | Improvements in or relating to antennae |
US2932823A (en) * | 1956-09-26 | 1960-04-12 | Marconi Wireless Telegraph Co | Selective directional slotted wave guide antenna |
US2967301A (en) * | 1957-10-15 | 1961-01-03 | Gen Precision Inc | Selective directional slotted waveguide antenna |
FR1217140A (en) * | 1958-12-01 | 1960-05-02 | Csf | Aerial improvements radiating several beams |
US3020549A (en) * | 1959-08-20 | 1962-02-06 | Morris L Kales | Matched antenna array |
US3135959A (en) * | 1960-03-24 | 1964-06-02 | Decca Ltd | Doppler antenna array employing multiple slotted waveguides with feed switching |
-
1962
- 1962-05-10 US US193717A patent/US3276026A/en not_active Expired - Lifetime
-
1963
- 1963-05-07 DE DE19631441741 patent/DE1441741A1/en active Pending
- 1963-05-09 GB GB18470/63A patent/GB1023112A/en not_active Expired
- 1963-05-09 FR FR934200A patent/FR1366047A/en not_active Expired
Also Published As
Publication number | Publication date |
---|---|
FR1366047A (en) | 1964-07-10 |
DE1441741A1 (en) | 1969-10-09 |
US3276026A (en) | 1966-09-27 |
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