GB1269981A - Improvements in or relating to protection circuit arrangements - Google Patents

Improvements in or relating to protection circuit arrangements

Info

Publication number
GB1269981A
GB1269981A GB886469A GB886469A GB1269981A GB 1269981 A GB1269981 A GB 1269981A GB 886469 A GB886469 A GB 886469A GB 886469 A GB886469 A GB 886469A GB 1269981 A GB1269981 A GB 1269981A
Authority
GB
United Kingdom
Prior art keywords
line
relating
feb
junction
protection circuit
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
GB886469A
Inventor
Brian Gerald Toms
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.)
Plessey Co Ltd
Original Assignee
Plessey 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 Plessey Co Ltd filed Critical Plessey Co Ltd
Priority to GB886469A priority Critical patent/GB1269981A/en
Priority to CA074335A priority patent/CA923565A/en
Priority to JP45013535A priority patent/JPS4922358B1/ja
Publication of GB1269981A publication Critical patent/GB1269981A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
    • H04B1/38—Transceivers, i.e. devices in which transmitter and receiver form a structural unit and in which at least one part is used for functions of transmitting and receiving
    • H04B1/40—Circuits
    • H04B1/44—Transmit/receive switching
    • H04B1/48—Transmit/receive switching in circuits for connecting transmitter and receiver to a common transmission path, e.g. by energy of transmitter
    • 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
    • G01S1/00—Beacons or beacon systems transmitting signals having a characteristic or characteristics capable of being detected by non-directional receivers and defining directions, positions, or position lines fixed relatively to the beacon transmitters; Receivers co-operating therewith
    • G01S1/02—Beacons or beacon systems transmitting signals having a characteristic or characteristics capable of being detected by non-directional receivers and defining directions, positions, or position lines fixed relatively to the beacon transmitters; Receivers co-operating therewith using radio waves
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
    • H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
    • H02H7/20—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for electronic equipment

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Power Engineering (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Radar, Positioning & Navigation (AREA)
  • Remote Sensing (AREA)
  • Signal Processing (AREA)
  • Radar Systems Or Details Thereof (AREA)
  • Input Circuits Of Receivers And Coupling Of Receivers And Audio Equipment (AREA)
  • Electronic Switches (AREA)

Abstract

1,269,981. TR switching. PLESSEY CO. Ltd. No. 8864/69. 6 Feb., 1970 [18 Feb., 1969 Heading H4L. [Also in Division H1] A protective arrangement for attenuation of signals passing along transmission line 1 comprises a PIN diode D1 and capacitor C in series across a line 2 connected in parallel with line 1, at a point X/4 from the connection. With no signal applied at T and D non-conductive the line 2 shows as a low impedance at the junction with 1, thus attenuating signals passing from a receiver aerial to (for example) a radar receiver. When A signal is applied to T to forward-bias D, the low impedance at A is reflected as a high impedance at the junction to allow received signals to pass unattenuated. Stub line 3 is provided to match the reactance of diode D.
GB886469A 1969-02-18 1969-02-18 Improvements in or relating to protection circuit arrangements Expired GB1269981A (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
GB886469A GB1269981A (en) 1969-02-18 1969-02-18 Improvements in or relating to protection circuit arrangements
CA074335A CA923565A (en) 1969-02-18 1970-02-09 Protection circuit arrangements
JP45013535A JPS4922358B1 (en) 1969-02-18 1970-02-18

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB886469A GB1269981A (en) 1969-02-18 1969-02-18 Improvements in or relating to protection circuit arrangements

Publications (1)

Publication Number Publication Date
GB1269981A true GB1269981A (en) 1972-04-12

Family

ID=9860732

Family Applications (1)

Application Number Title Priority Date Filing Date
GB886469A Expired GB1269981A (en) 1969-02-18 1969-02-18 Improvements in or relating to protection circuit arrangements

Country Status (3)

Country Link
JP (1) JPS4922358B1 (en)
CA (1) CA923565A (en)
GB (1) GB1269981A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5422746A (en) * 1977-07-22 1979-02-20 Hitachi Ltd Antenna circuit

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6262521U (en) * 1985-10-09 1987-04-18

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5422746A (en) * 1977-07-22 1979-02-20 Hitachi Ltd Antenna circuit

Also Published As

Publication number Publication date
CA923565A (en) 1973-03-27
JPS4922358B1 (en) 1974-06-07

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