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GB906221A - Improvements in or relating to transponders for use in secondary radar systems - Google Patents

Improvements in or relating to transponders for use in secondary radar systems

Info

Publication number
GB906221A
GB906221A GB18378/58A GB1837858A GB906221A GB 906221 A GB906221 A GB 906221A GB 18378/58 A GB18378/58 A GB 18378/58A GB 1837858 A GB1837858 A GB 1837858A GB 906221 A GB906221 A GB 906221A
Authority
GB
United Kingdom
Prior art keywords
pulses
pulse
supplied
pentode
delay
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
GB18378/58A
Inventor
Kennyth Ernest Harris
Leonard Perkins
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.)
AC Cossor Ltd
Original Assignee
AC Cossor 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
Priority to NL130962D priority Critical patent/NL130962C/xx
Priority to NL240008D priority patent/NL240008A/xx
Priority to GB35209/57A priority patent/GB904653A/en
Priority to US710031A priority patent/US3048835A/en
Priority to DEC19156A priority patent/DE1226175B/en
Priority to GB18378/58A priority patent/GB906221A/en
Application filed by AC Cossor Ltd filed Critical AC Cossor Ltd
Priority to DEC17096A priority patent/DE1124104B/en
Priority to US816554A priority patent/US3160884A/en
Priority to BE579338A priority patent/BE579338A/en
Priority to FR796827A priority patent/FR1226383A/en
Priority to CH7421159A priority patent/CH372355A/en
Publication of GB906221A publication Critical patent/GB906221A/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.
    • 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
    • G01S13/78—Systems using reradiation of radio waves, e.g. secondary radar systems; Analogous systems wherein pulse-type signals are transmitted discriminating between different kinds of targets, e.g. IFF-radar, i.e. identification of friend or foe
    • G01S13/781—Secondary Surveillance Radar [SSR] in general
    • G01S13/784—Coders or decoders therefor; Degarbling systems; Defruiting systems
    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10F—INORGANIC SEMICONDUCTOR DEVICES SENSITIVE TO INFRARED RADIATION, LIGHT, ELECTROMAGNETIC RADIATION OF SHORTER WAVELENGTH OR CORPUSCULAR RADIATION
    • H10F77/00—Constructional details of devices covered by this subclass
    • H10F77/20—Electrodes

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

906,221. Transformers; pulse radar. COSSOR Ltd., A. C. May 27, 1959 [June 9, 1958], No. 18378/58. Addition to 904,653. Classes 40 (5) and 40 (7). The transponder of the parent Specification is modified for use in a secondary radar system in which recurrent sets of radio-frequency pulses are transmitted, each set consisting of at least three pulses. As shown in Fig. 1, the output of a receiver 11 in the transponder is supplied to a winding 13 on a magnetostrictive delay line 12, the windings 14 and 15 being spaced to provide a delay corresponding to the interval between the first two pulses A and B of a set A, B, C. The pulse A is a control pulse radiated from an omni-directional aerial and the pulses B, C, are interrogating pulses radiated from a directional aerial. The windings 14, 15 are connected together so that a phase-reversing amplifier 18 is supplied with a negative-going pulse A, and an amplifier 17, which is not phase-reversing, is supplied with a pulse B-A representing the difference between A and B which is positive when B is greater than A, these pulses occurring simultaneously. The outputs of the amplifiers 17, 18 are applied to respective grids of a pentode gate 19. The amplifier 17 may be biased to pass a positive-going pulse only when it exceeds a predetermined amplitude or alternatively amplitude selection may be performed by suitably biasing the suppressor grid of the pentode 19. The negative-going pulse from 19 is supplied to an inverting and delay device 20 which supplies a positive-going pulse delayed with respect to its input pulse by a time equal to the interval between pulses B and C which is supplied to one grid of a pentode gate 21. The voltage induced in a winding 16 on the delay line has a negligible delay with respect to the winding 14 and includes a positive-going pulse corresponding to C which is amplified at 22 and applied to another grid of the pentode 21. Owing to the delay produced by the device 20 the pulses on the two grids occur at the same time and produce an output pulse which triggers the transmitter 23. The pentode 21 or amplifier 22 may be suitably biased to enable triggering to take place only when the amplitudes of the two pulses are in predetermined relation. A further transponder for use in a system transmitting recurring sets of four pulses is described, Fig. 3 (not shown).
GB18378/58A 1957-11-12 1958-06-09 Improvements in or relating to transponders for use in secondary radar systems Expired GB906221A (en)

Priority Applications (11)

Application Number Priority Date Filing Date Title
NL130962D NL130962C (en) 1957-11-12
NL240008D NL240008A (en) 1957-11-12
GB35209/57A GB904653A (en) 1958-06-09 1957-11-12 Improvements in or relating to transponder devices for use in secondary radar systems
US710031A US3048835A (en) 1957-11-12 1958-01-20 Transponder devices for use in secondary radar systems
DEC19156A DE1226175B (en) 1957-11-12 1958-06-08 Responding radar relay station
GB18378/58A GB906221A (en) 1958-06-09 1958-06-09 Improvements in or relating to transponders for use in secondary radar systems
DEC17096A DE1124104B (en) 1957-11-12 1958-06-30 Responding radar relay station
US816554A US3160884A (en) 1957-11-12 1959-05-28 Transponders for use in secondary radar systems
BE579338A BE579338A (en) 1958-06-09 1959-06-04 Improvements to beacons with repeater used in secondary radar systems.
FR796827A FR1226383A (en) 1957-11-12 1959-06-08 Responding beacon usable in secondary radar systems
CH7421159A CH372355A (en) 1957-11-12 1959-06-09 Transmitter for use in an interrogation radar system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB18378/58A GB906221A (en) 1958-06-09 1958-06-09 Improvements in or relating to transponders for use in secondary radar systems

Publications (1)

Publication Number Publication Date
GB906221A true GB906221A (en) 1962-09-19

Family

ID=10111439

Family Applications (2)

Application Number Title Priority Date Filing Date
GB35209/57A Expired GB904653A (en) 1957-11-12 1957-11-12 Improvements in or relating to transponder devices for use in secondary radar systems
GB18378/58A Expired GB906221A (en) 1957-11-12 1958-06-09 Improvements in or relating to transponders for use in secondary radar systems

Family Applications Before (1)

Application Number Title Priority Date Filing Date
GB35209/57A Expired GB904653A (en) 1957-11-12 1957-11-12 Improvements in or relating to transponder devices for use in secondary radar systems

Country Status (2)

Country Link
BE (1) BE579338A (en)
GB (2) GB904653A (en)

Also Published As

Publication number Publication date
GB904653A (en) 1962-08-29
BE579338A (en) 1959-10-01

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