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GB821171A - Improvements in radar apparatus - Google Patents

Improvements in radar apparatus

Info

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
Application number
GB8609/57A
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Marie G R P
Original Assignee
Marie G R P
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Marie G R P filed Critical Marie G R P
Publication of GB821171A publication Critical patent/GB821171A/en
Expired legal-status Critical Current

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.
GB8609/57A 1956-03-16 1957-03-15 Improvements in radar apparatus Expired GB821171A (en)

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)

* Cited by examiner, † Cited by third party
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.

Also Published As

Publication number Publication date
FR1146901A (en) 1957-11-18
BE555804A (en)

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