GB590469A - Radio detection system - Google Patents

Radio detection system

Info

Publication number
GB590469A
GB590469A GB9034/44A GB903444A GB590469A GB 590469 A GB590469 A GB 590469A GB 9034/44 A GB9034/44 A GB 9034/44A GB 903444 A GB903444 A GB 903444A GB 590469 A GB590469 A GB 590469A
Authority
GB
United Kingdom
Prior art keywords
varied
frequency
inductances
aerial
transmitter
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
GB9034/44A
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.)
STC PLC
Original Assignee
Standard Telephone and Cables 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 Standard Telephone and Cables PLC filed Critical Standard Telephone and Cables PLC
Publication of GB590469A publication Critical patent/GB590469A/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
    • G01S13/02—Systems using reflection of radio waves, e.g. primary radar systems; Analogous systems
    • G01S13/06—Systems determining position data of a target
    • G01S13/08—Systems for measuring distance only
    • G01S13/32—Systems for measuring distance only using transmission of continuous waves, whether amplitude-, frequency-, or phase-modulated, or unmodulated
    • G01S13/34—Systems for measuring distance only using transmission of continuous waves, whether amplitude-, frequency-, or phase-modulated, or unmodulated using transmission of continuous, frequency-modulated waves while heterodyning the received signal, or a signal derived therefrom, with a locally-generated signal related to the contemporaneously transmitted signal
    • 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
    • G01S13/08—Systems for measuring distance only
    • G01S13/10—Systems for measuring distance only using transmission of interrupted, pulse modulated waves
    • G01S13/14—Systems for measuring distance only using transmission of interrupted, pulse modulated waves wherein a voltage or current pulse is initiated and terminated in accordance respectively with the pulse transmission and echo reception
    • 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
    • G01S13/08—Systems for measuring distance only
    • G01S13/10—Systems for measuring distance only using transmission of interrupted, pulse modulated waves
    • G01S13/24—Systems for measuring distance only using transmission of interrupted, pulse modulated waves using frequency agility of carrier wave
    • 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
    • G01S13/74—Systems using reradiation of radio waves, e.g. secondary radar systems; Analogous systems
    • G01S13/82—Systems using reradiation of radio waves, e.g. secondary radar systems; Analogous systems wherein continuous-type signals are transmitted

Landscapes

  • Engineering & Computer Science (AREA)
  • Radar, Positioning & Navigation (AREA)
  • Remote Sensing (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Radar Systems Or Details Thereof (AREA)

Abstract

590,469. Radiolocation. STANDARD TELEPHONES & CABLES, Ltd. May 11, 1944, No. 9034. Convention date, Nov. 28, 1942. [Class 40 (v)] In a pulse radar system in which the frequency of the transmitter and the receiver is cyclically varied over a wide band to minimise detection and/or jamming by the enemy, the transmitter is continuously matched to its aerial by including an adjustable network which is varied in accordance with the variation of the transmitting frequency. In one embodiment, Fig. 2, the variable condenser 51 in the tuned anode circuit of the transmitter oscillator and the variable condenser 54 in the receiver tuned circuit are continuously varied by the motor 25 which may be controlled by the rheostat 58 and the radiation characteristic of the transmitting aerial 12 is maintained constant by simultaneously varying the condenser 61 in the impedance adjusting network 60. The frequency variation may be made more complex by replacing each variable condenser by two variable condensers in parallel which are driven simultaneously at different rates over different frequency ranges, Fig. 4 (not shown). In another embodiment, Fig. 3 (not shown), the tuning is varied by moving the cores of inductances in the tuned circuits and the impedance of the aerial matching network is varied by moving a shorting bar along a matching stub. The complex frequency variation is obtained by replacing the inductances by two inductances in parallel and by integrating the two driving movements to vary the shorting bar in a corresponding manner. Specifications 552,072, 590,480 and 14942/41, as open to inspection under Sect. 91, are referred to.
GB9034/44A 1942-11-28 1944-05-11 Radio detection system Expired GB590469A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US590469XA 1942-11-28 1942-11-28

Publications (1)

Publication Number Publication Date
GB590469A true GB590469A (en) 1947-07-18

Family

ID=22020475

Family Applications (1)

Application Number Title Priority Date Filing Date
GB9034/44A Expired GB590469A (en) 1942-11-28 1944-05-11 Radio detection system

Country Status (3)

Country Link
BE (1) BE482223A (en)
FR (2) FR953819A (en)
GB (1) GB590469A (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2950473A (en) * 1953-02-04 1960-08-23 Csf Radioelectric distance measuring systems
EP3316186B1 (en) * 2016-10-31 2021-04-28 Nokia Technologies Oy Controlling display of data to a person via a display apparatus

Also Published As

Publication number Publication date
BE482223A (en)
FR953819A (en) 1949-12-14
FR57705E (en) 1953-05-04

Similar Documents

Publication Publication Date Title
US2352216A (en) Automatic miniature radio range equipment
GB590469A (en) Radio detection system
US2490808A (en) Radio detection system
GB1094867A (en) Improvements in or relating to radio transmitters
GB643577A (en) Antenna element
US2472706A (en) Pulse transmission system
GB566026A (en) Improvements in radio direction-finding systems
GB634299A (en) Improvements in or relating to a method of and means for the radio-electric detection of obstacles
DE1021909B (en) Arrangement for the distance measurement of an interrogation station opposite several response stations by means of electromagnetic waves
US1311654A (en) Puwkxibapm co
GB563788A (en) Improvements relating to tuning arrangements for oscillatory circuits
GB723008A (en) Improvements in or relating to radar systems
US2623207A (en) Radio obstacle detector
GB600188A (en) Impulse modulating arrangements for radio frequency oscillators
GB634437A (en) Improvements in or relating to electrical automatic tuning unit
GB599600A (en) Improvements in or relating to wireless aerial systems
GB362377A (en) Improvements in and relating to the control of the phenomena in electric circuits
GB472580A (en) Improvements in or relating to apparatus for transmitting short impulses of high frequency energy
GB375410A (en) Improvements in or relating to receiving apparatus for electric wave signals
GB564323A (en) Improvements in transmitting aerial coupling arrangements
GB581296A (en) Improvements in and relating to aerial tuning systems for radio transmitters
GB544614A (en) Improvements in and relating to remote control systems
GB532274A (en) Improvements in or relating to coupling arrangements for lecher lines
GB638342A (en) Improvements in or relating to radio navigational systems
GB529103A (en) Improvements in or relating to wireless transmitting and receiving systems for two-way operation