GB821171A - Improvements in radar apparatus - Google Patents
Improvements in radar apparatusInfo
- Publication number
- GB821171A GB821171A GB8609/57A GB860957A GB821171A GB 821171 A GB821171 A GB 821171A GB 8609/57 A GB8609/57 A GB 8609/57A GB 860957 A GB860957 A GB 860957A GB 821171 A GB821171 A GB 821171A
- Authority
- GB
- United Kingdom
- Prior art keywords
- cavity
- aerial
- ferrite
- coupler
- march
- 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
- 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
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S1/00—Beacons or beacon systems transmitting signals having a characteristic or characteristics capable of being detected by non-directional receivers and defining directions, positions, or position lines fixed relatively to the beacon transmitters; Receivers co-operating therewith
- G01S1/02—Beacons or beacon systems transmitting signals having a characteristic or characteristics capable of being detected by non-directional receivers and defining directions, positions, or position lines fixed relatively to the beacon transmitters; Receivers co-operating therewith using radio waves
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01P—WAVEGUIDES; RESONATORS, LINES, OR OTHER DEVICES OF THE WAVEGUIDE TYPE
- H01P1/00—Auxiliary devices
- H01P1/20—Frequency-selective devices, e.g. filters
- H01P1/215—Frequency-selective devices, e.g. filters using ferromagnetic material
- H01P1/217—Frequency-selective devices, e.g. filters using ferromagnetic material the ferromagnetic material acting as a tuning element in resonators
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q3/00—Arrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system
- H01Q3/24—Arrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system varying the orientation by switching energy from one active radiating element to another, e.g. for beam switching
- H01Q3/245—Arrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system varying the orientation by switching energy from one active radiating element to another, e.g. for beam switching in the focal plane of a focussing device
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Radar, Positioning & Navigation (AREA)
- Remote Sensing (AREA)
- Radar Systems Or Details Thereof (AREA)
Abstract
821,171. Waveguide accessories. MARIE, G. R. P. March 15, 1957 [March 16, 1956; Nov. 12, 1956], No. 8609/57. Class 40 (8). [Also in Group XL (c)] In a microwave radar (see Group XL (c)), a cavity resonator coupling containing ferrite material blocks transmission between a rectangular waveguide and an aerial by the action of applied steady magnetic field on the circularly-polarized (C.P.) waves in the coupler. In one embodiment cavity resonators 21, 22, Fig. 3, coupled by slots 23 lie between guide 3 and aerial 18 and each contains soft iron and ferrite slugs 28, 29 respectively. High-permeability plates 24-26 close the magnetic circuit of coil 30 producing fields 31, 32 which respectively detune one cavity for one direction of rotation of C.P. and the other cavity for the other direction. In a second embodiment a single cavity 4, Fig. 6, is used to produce the same effect. The cavity, tuned by dielectric rods 54, carries ferrite sleeve 47 surrounded by ferrite pot 50 enclosing coil 51. In the application to a directive aerial system (see Group XL(c)), each aerial element has a coupler and the coils form sections of a delay line an input pulse to which causes elevation scanning by successive opening of transmission between aerial elements and radar transmitter/receiver. Specification 800,056 is referred to.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR1146901T | 1956-03-16 |
Publications (1)
Publication Number | Publication Date |
---|---|
GB821171A true GB821171A (en) | 1959-09-30 |
Family
ID=9645632
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB8609/57A Expired GB821171A (en) | 1956-03-16 | 1957-03-15 | Improvements in radar apparatus |
Country Status (3)
Country | Link |
---|---|
BE (1) | BE555804A (en) |
FR (1) | FR1146901A (en) |
GB (1) | GB821171A (en) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3067419A (en) * | 1959-01-08 | 1962-12-04 | Lab For Electronics Inc | Antenna beam scanning system |
FR2694452B1 (en) * | 1992-07-30 | 1994-09-02 | Alcatel Telspace | Agile bandpass filter for microwave frequencies. |
-
0
- BE BE555804D patent/BE555804A/xx unknown
-
1956
- 1956-03-16 FR FR1146901D patent/FR1146901A/en not_active Expired
-
1957
- 1957-03-15 GB GB8609/57A patent/GB821171A/en not_active Expired
Also Published As
Publication number | Publication date |
---|---|
BE555804A (en) | |
FR1146901A (en) | 1957-11-18 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
US2728050A (en) | Device for modulating ultra-short waves in a transmission line | |
GB923178A (en) | Improvements in or relating to radio apparatus for use in a continuous wave radio system | |
US2354365A (en) | Coupling device for adjustable coupling systems | |
GB1006095A (en) | Keying devices, particularly for electrical musical instruments | |
GB821171A (en) | Improvements in radar apparatus | |
US2936369A (en) | Ferrite microwave mixer | |
US2708237A (en) | Selective frequency changer | |
GB863879A (en) | Improvements in or relating to non-reciprocal electric coupling devices | |
GB810057A (en) | Improvements in wide-band directional waveguide couplers | |
GB836440A (en) | Improvements in or relating to the use of ferrite members in microwave conductors | |
GB863866A (en) | Improvements in or relating to to non-reciprocal electric coupling devices | |
GB1043887A (en) | Microwave cavity resonator | |
GB891427A (en) | Improvements in or relating to waveguide arrangements including elements of ferromagnetic ceramic material | |
US3049679A (en) | Microwave power multiplier | |
GB787522A (en) | Improvements in or relating to frequency and phase shifters and modulators for very high frequency electro-magnetic waves | |
GB777341A (en) | Improvements in or relating to microwave channels of magnetically variable electrical length | |
GB799172A (en) | Unidirectional waveguide attenuator | |
ES313734A1 (en) | Wave transmission system. (Machine-translation by Google Translate, not legally binding) | |
GB834412A (en) | Improvements relating to the coupling of electromagnetic energy | |
GB1033962A (en) | High frequency pulse transformer/distributor | |
SU131802A1 (en) | Polarization Switch on a Round Waveguide | |
GB859604A (en) | Improvements in or relating to high frequency apparatus | |
Gardiner et al. | Aids in the Design of Intermediate-Frequency Systems | |
SU364992A1 (en) | Microwave power limiter | |
GB1173616A (en) | Microwave Absorption Device. |