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GB500588A - Improvements in or relating to radio apparatus for detecting aircraft - Google Patents

Improvements in or relating to radio apparatus for detecting aircraft

Info

Publication number
GB500588A
GB500588A GB22355/37A GB2235537A GB500588A GB 500588 A GB500588 A GB 500588A GB 22355/37 A GB22355/37 A GB 22355/37A GB 2235537 A GB2235537 A GB 2235537A GB 500588 A GB500588 A GB 500588A
Authority
GB
United Kingdom
Prior art keywords
aircraft
receivers
short
wave
impulses
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
GB22355/37A
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.)
Marconis Wireless Telegraph Co Ltd
BAE Systems Electronics Ltd
Original Assignee
Marconis Wireless Telegraph Co Ltd
Marconi 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 Marconis Wireless Telegraph Co Ltd, Marconi Co Ltd filed Critical Marconis Wireless Telegraph Co Ltd
Priority to GB22355/37A priority Critical patent/GB500588A/en
Priority to US218656A priority patent/US2207267A/en
Publication of GB500588A publication Critical patent/GB500588A/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
    • 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

Landscapes

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

Abstract

500,588. Indicating proximity of aircraft. MARCONI'S WIRELESS TELEGRAPH CO., Ltd., and PLAISTOWE, D. L. Aug. 13, 1937, No. 22355. [Class 37] [Also in Group XL] In a radio system for detecting aircraft comprising a television indicator, a short-wave transmitter and a plurality of short-wave receivers distributed over the detection area and connected to the television indicator by transmission lines, the transmitted waves are modulated with impulses of a frequency corelated with the scanning line frequency of the indicator, and the signals from one or more of the receivers are applied as picture signals to the television indicator. The deflection plates 4, 5 of the cathode-ray tube 1 are supplied with a frame frequency of 50 cycles and a line frequency of 10,000 cycles from the time-base circuits 7, 8 which may be driven from the master source 6.- The output from the line - time-base circuit 8 is fed to the network 9 designed to produce short rectilinear synchronising pulses of, line frequency which modulate a short wave transmitter 11 in the modulator 10 such that the modulation impulses are of longer time length than the synchronising impulses. Radiation from the transmitting aerial 12 is picked up by the distributed receivers 13-16 and applied to the control grid of the cathode-ray tube 1 through transmission lines 17-20, switches 22-25, and the mixer stage 21. In the absence of any reflector in the vicinity of the receivers a black bar is seen down one edge of the television " raster " (assuming the framing direction to be vertical) due to the elongated pulses transmitted. If an aircraft is near one of the receivers, that receiver picks up an indirect wave reflected from the aircraft which is out of phase with respect to the direct wave and an additional black bar, which moves with the aircraft, is seen on the " raster." By opening all the switches 22-25 and closing them one at a time the direction of the aircraft can be determined.
GB22355/37A 1937-08-13 1937-08-13 Improvements in or relating to radio apparatus for detecting aircraft Expired GB500588A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
GB22355/37A GB500588A (en) 1937-08-13 1937-08-13 Improvements in or relating to radio apparatus for detecting aircraft
US218656A US2207267A (en) 1937-08-13 1938-07-11 Radio apparatus for detecting aircraft

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB22355/37A GB500588A (en) 1937-08-13 1937-08-13 Improvements in or relating to radio apparatus for detecting aircraft

Publications (1)

Publication Number Publication Date
GB500588A true GB500588A (en) 1939-02-13

Family

ID=10178063

Family Applications (1)

Application Number Title Priority Date Filing Date
GB22355/37A Expired GB500588A (en) 1937-08-13 1937-08-13 Improvements in or relating to radio apparatus for detecting aircraft

Country Status (2)

Country Link
US (1) US2207267A (en)
GB (1) GB500588A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1277948B (en) * 1966-02-25 1968-09-19 Boelkow Gmbh Arrangement for determining the location of an object

Families Citing this family (26)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2554515A (en) * 1938-08-06 1951-05-29 Leo C Young Radio ranging system
BE463611A (en) * 1939-12-05
US2589965A (en) * 1940-01-10 1952-03-18 Rost Helge Fabian System for locating, indicating, and/or following objects in space
US2440250A (en) * 1940-04-04 1948-04-27 Int Standard Electric Corp Radio location system
US2449976A (en) * 1941-02-24 1948-09-28 Int Standard Electric Corp Tridimensional obstacle detection system
BE465776A (en) * 1941-03-05
US2423104A (en) * 1941-03-13 1947-07-01 Int Standard Electric Corp Direction indicating apparatus
US2445213A (en) * 1941-04-30 1948-07-13 Rca Corp Obstacle detector
US2885665A (en) * 1941-05-29 1959-05-05 Rca Corp Pulse echo recognition systems
US2453970A (en) * 1941-05-31 1948-11-16 Rca Corp Recognition system for pulse echo radio locators
US3312970A (en) * 1941-06-27 1967-04-04 Rca Corp Pulse echo recognition systems
US3331068A (en) * 1941-07-10 1967-07-11 Int Standard Electric Corp Aircraft identifier
US2423024A (en) * 1941-12-26 1947-06-24 Rca Corp Radio pulse altimeter and object detector
US3296615A (en) * 1942-01-19 1967-01-03 Robert M Page Identification and recognition system
US2883659A (en) * 1942-03-18 1959-04-21 Sylvania Electric Prod Timing and phase-control circuits
US2474219A (en) * 1942-09-14 1949-06-28 Standard Telephones Cables Ltd Pulse generating system
US2423519A (en) * 1943-12-24 1947-07-08 Rca Corp Reflected wave direction finder
US2470787A (en) * 1944-05-04 1949-05-24 Paul W Nosker System for determining the position or path of an object in space
US2597862A (en) * 1945-05-03 1952-05-27 John H Greig Electronic lobing
US2653310A (en) * 1945-12-10 1953-09-22 Richard C Allen Gain measuring device
AU2001292686A1 (en) * 2000-09-14 2002-03-26 Time Domain Corporation System and method for detecting an intruder using impulse radio technology
US6963301B2 (en) * 2002-08-19 2005-11-08 G-Track Corporation System and method for near-field electromagnetic ranging
US7298314B2 (en) * 2002-08-19 2007-11-20 Q-Track Corporation Near field electromagnetic positioning system and method
US7414571B2 (en) * 2002-08-19 2008-08-19 Q-Track Corporation Low frequency asset tag tracking system and method
US7307595B2 (en) * 2004-12-21 2007-12-11 Q-Track Corporation Near field location system and method
JP5635723B2 (en) * 2006-01-30 2014-12-03 富士通株式会社 Target detection apparatus and system

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1277948B (en) * 1966-02-25 1968-09-19 Boelkow Gmbh Arrangement for determining the location of an object

Also Published As

Publication number Publication date
US2207267A (en) 1940-07-09

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