GB580978A - Improvements relating to radio-locating systems - Google Patents

Improvements relating to radio-locating systems

Info

Publication number
GB580978A
GB580978A GB1280842A GB1280842A GB580978A GB 580978 A GB580978 A GB 580978A GB 1280842 A GB1280842 A GB 1280842A GB 1280842 A GB1280842 A GB 1280842A GB 580978 A GB580978 A GB 580978A
Authority
GB
United Kingdom
Prior art keywords
transmitter
sum
orientation
signals
pair
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
GB1280842A
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.)
Sperry Gyroscope Co Ltd
Original Assignee
Sperry Gyroscope Co Ltd
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 Sperry Gyroscope Co Ltd filed Critical Sperry Gyroscope Co Ltd
Priority to GB1280842A priority Critical patent/GB580978A/en
Publication of GB580978A publication Critical patent/GB580978A/en
Expired legal-status Critical Current

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
    • 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
    • G01S13/87—Combinations of radar systems, e.g. primary radar and secondary radar
    • 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
    • G01S13/4481—Monopulse hybrid systems, e.g. conopulse

Landscapes

  • Engineering & Computer Science (AREA)
  • Radar, Positioning & Navigation (AREA)
  • Remote Sensing (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Variable-Direction Aerials And Aerial Arrays (AREA)

Abstract

580,978. Directive wireless signalling. SPERRY GYROSCOPE CO., Ltd., and NISBET, R. H. Dec. 8, 1941, No. 12808/42. Divided out of 580,975. [Class 40 (v)] A system for determining the direction of an object from a transmitting station comprises an equi-signal beacon at the transmitting station, means for turning the beacon about an axis, a receiver responsive to the radiation reflected by the object and including means for deter. mining the orientation of the transmitter for which the receiver response is equal for the two signals. In the described embodiment, the transmitter comprises a pair of antenna and reflector units 5<1> 5<11>, Fig. 2, set at an angle and rotatable together to produce a pair of overlapping beams having characteristic modulation frequencies of w1 and w2 respectively, the reflected wave being received by a similar rotatable unit. After rectification at 66 the modulation components are separated by a filter 67 and separately rectified at 68, 69 to give D.C. outputs which are applied to circuits 70, 71 in such a way as to produce currents proportional respectively to the difference and the sum of the signals. These are fed to relays 73, 74 arranged so that a signal is recorded on an indicator 76 only when the difference is zero and the sum is of substantial value. The orientation of the transmitter at this instant gives the direction of the reflecting object. Instead of using a rotating antenna, the overlapping beams may be produced by successively energized antennµ as described in Specification 526,658. Specification 580,975 also is referred to.
GB1280842A 1941-12-08 1941-12-08 Improvements relating to radio-locating systems Expired GB580978A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB1280842A GB580978A (en) 1941-12-08 1941-12-08 Improvements relating to radio-locating systems

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1280842A GB580978A (en) 1941-12-08 1941-12-08 Improvements relating to radio-locating systems

Publications (1)

Publication Number Publication Date
GB580978A true GB580978A (en) 1946-09-26

Family

ID=10011524

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1280842A Expired GB580978A (en) 1941-12-08 1941-12-08 Improvements relating to radio-locating systems

Country Status (1)

Country Link
GB (1) GB580978A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3167764A (en) * 1960-12-05 1965-01-26 Marconi Co Ltd Radar locating system employing plural transmitted frequencies

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3167764A (en) * 1960-12-05 1965-01-26 Marconi Co Ltd Radar locating system employing plural transmitted frequencies

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