SE7711967L - FOR ELECTROMAGNETIC RADIATION SENSITIVE RECEIVER - Google Patents

FOR ELECTROMAGNETIC RADIATION SENSITIVE RECEIVER

Info

Publication number
SE7711967L
SE7711967L SE7711967A SE7711967A SE7711967L SE 7711967 L SE7711967 L SE 7711967L SE 7711967 A SE7711967 A SE 7711967A SE 7711967 A SE7711967 A SE 7711967A SE 7711967 L SE7711967 L SE 7711967L
Authority
SE
Sweden
Prior art keywords
pair
angle
difference signal
basis
taken
Prior art date
Application number
SE7711967A
Other languages
Unknown language ( )
Swedish (sv)
Other versions
SE411596B (en
Inventor
A Torby
Original Assignee
Saab Scania Ab
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 Saab Scania Ab filed Critical Saab Scania Ab
Priority to SE7711967A priority Critical patent/SE411596B/en
Priority to GB7841298A priority patent/GB2007065B/en
Priority to DE2845989A priority patent/DE2845989C2/en
Priority to NO783602A priority patent/NO145255C/en
Priority to DK471578A priority patent/DK150556C/en
Priority to FR7830248A priority patent/FR2407486A1/en
Priority to JP13146378A priority patent/JPS54102849A/en
Publication of SE7711967L publication Critical patent/SE7711967L/en
Publication of SE411596B publication Critical patent/SE411596B/en

Links

Classifications

    • 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
    • G01S3/46—Systems for determining direction or deviation from predetermined direction using antennas spaced apart and measuring phase or time difference between signals therefrom, i.e. path-difference systems
    • G01S3/48—Systems for determining direction or deviation from predetermined direction using antennas spaced apart and measuring phase or time difference between signals therefrom, i.e. path-difference systems the waves arriving at the antennas being continuous or intermittent and the phase difference of signals derived therefrom being measured
    • 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
    • G01S3/04—Details
    • G01S3/06—Means for increasing effective directivity, e.g. by combining signals having differently oriented directivity characteristics or by sharpening the envelope waveform of the signal derived from a rotating or oscillating beam antenna
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q25/00—Antennas or antenna systems providing at least two radiating patterns
    • H01Q25/002—Antennas or antenna systems providing at least two radiating patterns providing at least two patterns of different beamwidth; Variable beamwidth antennas

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • General Physics & Mathematics (AREA)
  • Radar, Positioning & Navigation (AREA)
  • Remote Sensing (AREA)
  • Radar Systems Or Details Thereof (AREA)
  • Variable-Direction Aerials And Aerial Arrays (AREA)
  • Surgical Instruments (AREA)

Abstract

An antenna array for direction determination comprises two pairs of elongated end-firing log-periodic antenna elements 1, 2 and 3, 4, each pair fixed symmetrically to a reference plane 5 and forwardly convergent to it. The two antenna elements of one pair converge forwardly at an angle b, those of the other pair converge at an angle a = 1.5 b. From the detected and amplified signals of each pair there is obtained a difference signal designated L1, for the b-angle pair, L2 for the a-angle pair. A third difference signal L3 is obtained from L2-L1. The magnitude of each difference signal depends upon value of an angle V between a boresight axis 12 and a detected radiation source. An indication of V is taken on the basis of L1 if L1, L2 and L3 are on the same side of zero. A more precise indication of V is then taken on the basis of L2 by comparing absolute value of L2 with the absolute value of an adjustable reference signal. <IMAGE>
SE7711967A 1977-10-25 1977-10-25 FOR ELECTROMAGNETIC RADIATION SENSITIVE DEVICE, FITTED TO LOCATE A TRANSMITTER SE411596B (en)

Priority Applications (7)

Application Number Priority Date Filing Date Title
SE7711967A SE411596B (en) 1977-10-25 1977-10-25 FOR ELECTROMAGNETIC RADIATION SENSITIVE DEVICE, FITTED TO LOCATE A TRANSMITTER
GB7841298A GB2007065B (en) 1977-10-25 1978-10-20 Electromagnetic radiation sensor
DE2845989A DE2845989C2 (en) 1977-10-25 1978-10-23 Device for determining the direction of incidence of electromagnetic waves, in particular of radar pulses
NO783602A NO145255C (en) 1977-10-25 1978-10-24 DEVICE SENSITIVE TO ELECTROMAGNETIC RADIATION
DK471578A DK150556C (en) 1977-10-25 1978-10-24 DETECTOR FOR ELECTROMAGNETIC RADIATION
FR7830248A FR2407486A1 (en) 1977-10-25 1978-10-24 DEVICE FOR DETERMINING A DIRECTION RESPONDING TO ELECTROMAGNETIC RADIATION
JP13146378A JPS54102849A (en) 1977-10-25 1978-10-25 Receiver for responding to electromagnetic radiation signal

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SE7711967A SE411596B (en) 1977-10-25 1977-10-25 FOR ELECTROMAGNETIC RADIATION SENSITIVE DEVICE, FITTED TO LOCATE A TRANSMITTER

Publications (2)

Publication Number Publication Date
SE7711967L true SE7711967L (en) 1979-04-26
SE411596B SE411596B (en) 1980-01-14

Family

ID=20332670

Family Applications (1)

Application Number Title Priority Date Filing Date
SE7711967A SE411596B (en) 1977-10-25 1977-10-25 FOR ELECTROMAGNETIC RADIATION SENSITIVE DEVICE, FITTED TO LOCATE A TRANSMITTER

Country Status (7)

Country Link
JP (1) JPS54102849A (en)
DE (1) DE2845989C2 (en)
DK (1) DK150556C (en)
FR (1) FR2407486A1 (en)
GB (1) GB2007065B (en)
NO (1) NO145255C (en)
SE (1) SE411596B (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2250153B (en) * 1984-09-24 1992-10-14 Siemens Ag Methods of and systems for discovering hovering helicopters
GB2281671B (en) * 1993-08-24 1997-07-09 Cossor Electronics Ltd Improvements relating to radar antenna systems
DE59507604D1 (en) * 1994-10-25 2000-02-17 Daimler Chrysler Ag RF seeker antenna system for missiles

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4023172A (en) * 1959-12-17 1977-05-10 Numax Electronics Incorporated Monopulse system for cancellation of side lobe effects
US3761927A (en) * 1972-03-20 1973-09-25 United Aircraft Corp Rf phase detected interferometer radar
GB1337099A (en) * 1972-05-17 1973-11-14

Also Published As

Publication number Publication date
DK150556C (en) 1988-02-08
DE2845989C2 (en) 1983-08-18
NO783602L (en) 1979-04-26
FR2407486A1 (en) 1979-05-25
JPS54102849A (en) 1979-08-13
DK150556B (en) 1987-03-23
GB2007065A (en) 1979-05-10
SE411596B (en) 1980-01-14
DK471578A (en) 1979-04-26
FR2407486B1 (en) 1984-10-26
DE2845989A1 (en) 1979-04-26
NO145255B (en) 1981-11-02
GB2007065B (en) 1982-04-28
NO145255C (en) 1982-02-10

Similar Documents

Publication Publication Date Title
GB1395599A (en) Receiver for the determination of the direction of received wave energy
CA2251838A1 (en) Remote position sensing apparatus and method
SE7711967L (en) FOR ELECTROMAGNETIC RADIATION SENSITIVE RECEIVER
ATE173083T1 (en) SENSOR FOR DETECTING ELECTROMAGNETIC RADIATION
US4277788A (en) Direction determining apparatus responsive to electromagnetic radiation
JPS5633509A (en) Distance measuring device
DK0498429T3 (en) Improved target detector with low sensitivity at short distances
US3042897A (en) Passive wave propagation direction indicator
US2422096A (en) Direction finding system
JPS51120247A (en) A range finder
JPS54119894A (en) Angle measuring unit
US4210913A (en) Passive detection and tracking apparatus
JPS56137169A (en) Direction measuring device
JPS54136888A (en) Surface defect detecting device
JPS5442913A (en) Multi-path detection circuit
SU1536525A1 (en) Device for determining high voltage at x-ray tube
US3130409A (en) Radio direction finding system
DISNEY Incoherent arrays(post detector type optical telescope)
JPS5652763A (en) Position detector
JPH03287010A (en) Sun sensor
JPS5761965A (en) Direction finder
GB1157951A (en) Improvements relating to Infra-Red and Optical Signal Detecting Devices with particular reference to Background Discrimination
Solodova Investigation of the accuracy of a delay-lock loop system with fluctuations of delay in the feedback circuit
JPS55154426A (en) Temperature measuring apparatus of low emissivity object in infrared ray measurement
JPS5487547A (en) Lens inspector

Legal Events

Date Code Title Description
NAL Patent in force

Ref document number: 7711967-5

Format of ref document f/p: F

NUG Patent has lapsed

Ref document number: 7711967-5

Format of ref document f/p: F