GB616364A - Improvements in radio beacon and like equipment - Google Patents

Improvements in radio beacon and like equipment

Info

Publication number
GB616364A
GB616364A GB1521646A GB1521646A GB616364A GB 616364 A GB616364 A GB 616364A GB 1521646 A GB1521646 A GB 1521646A GB 1521646 A GB1521646 A GB 1521646A GB 616364 A GB616364 A GB 616364A
Authority
GB
United Kingdom
Prior art keywords
responder
pulses
pulse
greater amplitude
aerial
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
GB1521646A
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Priority to GB1521646A priority Critical patent/GB616364A/en
Publication of GB616364A publication Critical patent/GB616364A/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
    • G01S13/74—Systems using reradiation of radio waves, e.g. secondary radar systems; Analogous systems
    • G01S13/76—Systems using reradiation of radio waves, e.g. secondary radar systems; Analogous systems wherein pulse-type signals are transmitted
    • G01S13/762—Systems using reradiation of radio waves, e.g. secondary radar systems; Analogous systems wherein pulse-type signals are transmitted with special measures concerning the radiation pattern, e.g. S.L.S.

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

616,364. Directive radio systems. BROWN, R. H. June 20, 1947, No. 15216/46. [Class 40 (vii)] In order to prevent a responder beacon from being triggered by the side lobes radiated by the directional aerial of an interrogating transmitter, an additional omnidirectional transmission is radiated by the interrogator such that the omnidirectional transmission produces a signal of greater amplitude than the directional transmission at the responder except when the main lobe of the directional aerial is pointed at the responder. The directional aerial periodically transmits a pair A, B of pulses having a predetermined time spacing suitable to trigger the responder and the omnidirectional aerial periodically transmits a single pulse C timed to occur midway between the pulses A. and B. Automatic gain control means is provided at the responder to fix a threshold level at the level of each received pulse, which level decays slowly with time. Thus, when pulses A and B are of greater amplitude than pulse C, A and B only are passed and the responder is operated. However, when pulse C has the greater amplitude only pulses A and C are passed, the time spacing of which differs from the predetermined value, and the responder is not operated.
GB1521646A 1947-06-20 1947-06-20 Improvements in radio beacon and like equipment Expired GB616364A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB1521646A GB616364A (en) 1947-06-20 1947-06-20 Improvements in radio beacon and like equipment

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1521646A GB616364A (en) 1947-06-20 1947-06-20 Improvements in radio beacon and like equipment

Publications (1)

Publication Number Publication Date
GB616364A true GB616364A (en) 1949-01-20

Family

ID=10055084

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1521646A Expired GB616364A (en) 1947-06-20 1947-06-20 Improvements in radio beacon and like equipment

Country Status (1)

Country Link
GB (1) GB616364A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1030896B (en) * 1952-05-09 1958-05-29 Cossor Ltd A C Responding relay station for radar systems

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1030896B (en) * 1952-05-09 1958-05-29 Cossor Ltd A C Responding relay station for radar systems

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