GB676032A - Improvements in or relating to radio distance measuring apparatus - Google Patents

Improvements in or relating to radio distance measuring apparatus

Info

Publication number
GB676032A
GB676032A GB56550A GB56550A GB676032A GB 676032 A GB676032 A GB 676032A GB 56550 A GB56550 A GB 56550A GB 56550 A GB56550 A GB 56550A GB 676032 A GB676032 A GB 676032A
Authority
GB
United Kingdom
Prior art keywords
frequency
indicators
switch
craft
condenser
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
GB56550A
Inventor
Max Joseph Silver
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.)
General Electric Co PLC
Original Assignee
General Electric Co 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 General Electric Co PLC filed Critical General Electric Co PLC
Priority to GB56550A priority Critical patent/GB676032A/en
Publication of GB676032A publication Critical patent/GB676032A/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

676,032. Radiolocation. GENERAL ELECTRIC CO., Ltd. Jan. 9, 1951 [Jan. 9, 1950], No. 565/50. Class 40 (vii). Frequency-modulated radar distance measuring apparatus for aircraft includes a transmitting aerial system and a receiving aerial system each arranged to have radiation patterns with two different directions of high sensitivity, namely ahead of, and downwards from, the aircraft, and switching means so arranged that transmission and reception takes place alternately in one only of the two directions, the switch means also feeding the beat frequency produced in the receiver alternately to two distance indicators in synchronism with the change of direction so that the indicators show respectively the range of reflecting objects in the two directions. The invention thus indicates the craft's altitude and the range of obstructions ahead of the craft. A suitable aerial system may comprise a pair of reflector backed transmitting aerials 11 and 12 fed alternately by frequency modulated transmitter 1 through switch 8 and a like pair of receiving aerials 13 and 14 feeding the receiving system through switch 9. The receiver as shown includes an intermediate frequency oscillator 15 and I.F. amplifier 19 and its output beat frequency is fed through amplifier 5, and switch 10 operated in synchronizm with switches 8 and 9 to indicators 6 and 7 registering the distance of the reflecting objects. The transmitter may include an oscillator having a resonant cavity assembly, the capacity of a condenser built into the structure of which is varied by rotation of a shaft carrying the condenser vane. Preferably two vanes are provided so that the modulation frequency makes alternate sweeps over different frequency ranges and a commutator on the condenser shaft brings into action corresponding units in indicators 6 and 7 having ranges for example of 0-1000 and 0-5000 feet. If desired, a warning device may be substituted for the short distance range when measuring distances to obstacles ahead on the craft's course.
GB56550A 1950-01-09 1950-01-09 Improvements in or relating to radio distance measuring apparatus Expired GB676032A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB56550A GB676032A (en) 1950-01-09 1950-01-09 Improvements in or relating to radio distance measuring apparatus

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB56550A GB676032A (en) 1950-01-09 1950-01-09 Improvements in or relating to radio distance measuring apparatus

Publications (1)

Publication Number Publication Date
GB676032A true GB676032A (en) 1952-07-23

Family

ID=9706607

Family Applications (1)

Application Number Title Priority Date Filing Date
GB56550A Expired GB676032A (en) 1950-01-09 1950-01-09 Improvements in or relating to radio distance measuring apparatus

Country Status (1)

Country Link
GB (1) GB676032A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3140461A (en) * 1961-03-14 1964-07-07 Chester M Mckinney Method for obtaining high range resolution with continuous transmission frequency

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3140461A (en) * 1961-03-14 1964-07-07 Chester M Mckinney Method for obtaining high range resolution with continuous transmission frequency

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