GB871383A - Improvements in or relating to radio direction finding systems - Google Patents

Improvements in or relating to radio direction finding systems

Info

Publication number
GB871383A
GB871383A GB2496458A GB2496458A GB871383A GB 871383 A GB871383 A GB 871383A GB 2496458 A GB2496458 A GB 2496458A GB 2496458 A GB2496458 A GB 2496458A GB 871383 A GB871383 A GB 871383A
Authority
GB
United Kingdom
Prior art keywords
guides
amplitudes
waveguides
couplers
waves
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
GB2496458A
Inventor
Donald Francis Hewitt
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.)
General Electric Co PLC
Original Assignee
General Electric Co PLC
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 General Electric Co PLC filed Critical General Electric Co PLC
Publication of GB871383A publication Critical patent/GB871383A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q25/00—Antennas or antenna systems providing at least two radiating patterns
    • H01Q25/02—Antennas or antenna systems providing at least two radiating patterns providing sum and difference patterns
    • 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
    • G01S13/00—Systems using the reflection or reradiation of radio waves, e.g. radar systems; Analogous systems using reflection or reradiation of waves whose nature or wavelength is irrelevant or unspecified
    • G01S13/02—Systems using reflection of radio waves, e.g. primary radar systems; Analogous systems
    • G01S13/06—Systems determining position data of a target
    • G01S13/42—Simultaneous measurement of distance and other co-ordinates
    • G01S13/44—Monopulse radar, i.e. simultaneous lobing
    • G01S13/4409—HF sub-systems particularly adapted therefor, e.g. circuits for signal combination
    • 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
    • G01S3/00—Direction-finders for determining the direction from which infrasonic, sonic, ultrasonic, or electromagnetic waves, or particle emission, not having a directional significance, are being received
    • G01S3/02—Direction-finders for determining the direction from which infrasonic, sonic, ultrasonic, or electromagnetic waves, or particle emission, not having a directional significance, are being received using radio waves
    • G01S3/14—Systems for determining direction or deviation from predetermined direction
    • G01S3/28—Systems for determining direction or deviation from predetermined direction using amplitude comparison of signals derived simultaneously from receiving antennas or antenna systems having differently-oriented directivity characteristics
    • G01S3/32—Systems for determining direction or deviation from predetermined direction using amplitude comparison of signals derived simultaneously from receiving antennas or antenna systems having differently-oriented directivity characteristics derived from different combinations of signals from separate antennas, e.g. comparing sum with difference
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01P—WAVEGUIDES; RESONATORS, LINES, OR OTHER DEVICES OF THE WAVEGUIDE TYPE
    • H01P5/00—Coupling devices of the waveguide type
    • H01P5/12—Coupling devices having more than two ports
    • H01P5/16—Conjugate devices, i.e. devices having at least one port decoupled from one other port

Abstract

871,383. Radio direction-finding. GENERAL ELECTRIC CO. Ltd. July 24, 1959 [Aug. 1, 1958], No. 24964/58. Class 40(7) [Also in Group XL(b) ] A direction-finding system includes a unitary waveguide structure comprising four rectangular waveguides coupled through common walls by four couplers in such a way that outputs are obtainable from two of the guides the amplitudes of which constitute a measure of the position of a source of radiation in two orthogonal planes. The waveguides 1, 2, 3, 4, Fig. 1, are connected to four radio aerials comprising open-ended guides arranged at the four corners of a square. The waves passed to the waveguides 1, 2 and 4 are shifted in phase by 180, 90 and 90 degrees respectively by phase-shifting devices 5, 6 and 7. The waveguides are inter connected in the manner shown by four couplers 8, 9, 10, 11 of the type which effect an equal division of energy between the coupled guides. The amplitudes of the waves at points 12, 13, 14, 15 are proportional to (B+C)-(A+D), A+B+C+D, (C+D)- (A+B) and (B+D)-(A+C) where the letters denote the input amplitudes. If the aerials connected to guides 1, 2 are directly above those connected to guides 4, 3 respectively, the amplitudes at 12 and 14 will give azimuth and elevation measures of the position of the source. These signals and the signal at point 13, which represents the sum A+B+C+D are heterodyned with waves from a local oscillator, supplied over guide 18, in mixers 16, 17, 27 respectively comprising couplers 21, 25, 26. Where the apparatus forms the direction-finding system of a missile guided by reflections from the target, an additional aerial for receiving signals from a ground transmitter is connected to a guide 75. These signals are heterodyned with the local oscillator frequency in a mixer 74. Specifications 871,381, 871,382 and 871,384 are referred to.
GB2496458A 1958-08-01 1958-08-01 Improvements in or relating to radio direction finding systems Expired GB871383A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB2496358A GB871382A (en) 1958-08-01 1958-08-01 Improvements in or relating to methods of manufacturing waveguide structures

Publications (1)

Publication Number Publication Date
GB871383A true GB871383A (en) 1961-06-28

Family

ID=10220047

Family Applications (2)

Application Number Title Priority Date Filing Date
GB2496458A Expired GB871383A (en) 1958-08-01 1958-08-01 Improvements in or relating to radio direction finding systems
GB2496358A Expired GB871382A (en) 1958-08-01 1958-08-01 Improvements in or relating to methods of manufacturing waveguide structures

Family Applications After (1)

Application Number Title Priority Date Filing Date
GB2496358A Expired GB871382A (en) 1958-08-01 1958-08-01 Improvements in or relating to methods of manufacturing waveguide structures

Country Status (1)

Country Link
GB (2) GB871383A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2233831A (en) * 1989-07-15 1991-01-16 British Aerospace Waveguide coupling networks
GB2237692A (en) * 1989-11-02 1991-05-08 British Aerospace Waveguide networks
US5105170A (en) * 1989-07-15 1992-04-14 British Aerospace Public Limited Company Waveguide coupling networks

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2172855B1 (en) * 1972-02-24 1974-08-02 Cit Alcatel

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2233831A (en) * 1989-07-15 1991-01-16 British Aerospace Waveguide coupling networks
US5105170A (en) * 1989-07-15 1992-04-14 British Aerospace Public Limited Company Waveguide coupling networks
GB2233831B (en) * 1989-07-15 1994-03-23 British Aerospace Shared power amplifiers
GB2237692A (en) * 1989-11-02 1991-05-08 British Aerospace Waveguide networks
GB2237692B (en) * 1989-11-02 1994-02-09 British Aerospace Waveguide networks

Also Published As

Publication number Publication date
GB871382A (en) 1961-06-28

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