GB647663A - Improvements in or relating to navigation aiding radio systems - Google Patents

Improvements in or relating to navigation aiding radio systems

Info

Publication number
GB647663A
GB647663A GB681948A GB681948A GB647663A GB 647663 A GB647663 A GB 647663A GB 681948 A GB681948 A GB 681948A GB 681948 A GB681948 A GB 681948A GB 647663 A GB647663 A GB 647663A
Authority
GB
United Kingdom
Prior art keywords
beacon
receiver
signal
transmitter
received
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
GB681948A
Inventor
Sidney Arthur Walter Jolliffe
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 GB681948A priority Critical patent/GB647663A/en
Publication of GB647663A publication Critical patent/GB647663A/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)
  • Position Fixing By Use Of Radio Waves (AREA)

Abstract

647,663. Radio navigation. MARCONI'S WIRELESS TELEGRAPH CO., Ltd. March 4, 1948, No. 6819. [Class 40 (vii)] A navigation aiding radio system comprises a phase comparison omnidirectional radio beacon and a receiver on the ground, means for transferring a predetermined signal derived by the receiver to the carrier of the beacon transmission and, on a mobile craft, a transmitter for transmitting the predetermined signal to the beacon receiver, a receiver for co-operating with the beacon, and means for effecting phase comparison measurements either between the beacon signals or between the predetermined signal as transmitted from, and as received back at, the craft. The system is thus a combination of a radio beacon and an aircraft radar distance measuring system with a cooperating responder on the ground. The aircraft equipment may include a transmitter AT modulated by a 935 c/s. oscillator AO and signals therefrom be received at the beacon by receiver GR. Switch SW enables the 935 c/s. received modulation to be used to modulate the beacon transmitter or, alternatively speech communication to be applied from communication unit TC. Transmitter GT feeds an aerial system comprising horizontal fixed loop L and horizontal rotating dipole D mounted inside a vertical guide W having a ring of slots S. The radiation from loop L includes a 30 c/s. reference modulation signal on a sub-carrier and the dipole rotates at 1800 r.p.m. and its carrier is modulated with a 30 c/s. signal. The craft receiver AR includes means for detecting and separating the 30 c/s. reference modulation, the 30 c/s. signal whose phase is dependent on azimuth, and the returned 935 c/s. signal. The two former may be applied to a phase comparison circuit and indicator PI or the phase relationship between the 935 c/s. received signal and the output from oscillator AO determined. The same indicator is preferably used for both purposes. Fig. 4 (not shown), indicates suitable switching arrangements for determining one or the other phase relationship as desired on the same indicator.
GB681948A 1948-03-04 1948-03-04 Improvements in or relating to navigation aiding radio systems Expired GB647663A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB681948A GB647663A (en) 1948-03-04 1948-03-04 Improvements in or relating to navigation aiding radio systems

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB681948A GB647663A (en) 1948-03-04 1948-03-04 Improvements in or relating to navigation aiding radio systems

Publications (1)

Publication Number Publication Date
GB647663A true GB647663A (en) 1950-12-20

Family

ID=9821338

Family Applications (1)

Application Number Title Priority Date Filing Date
GB681948A Expired GB647663A (en) 1948-03-04 1948-03-04 Improvements in or relating to navigation aiding radio systems

Country Status (1)

Country Link
GB (1) GB647663A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1023798B (en) * 1955-07-04 1958-02-06 Int Standard Electric Corp Radio navigation system for the uninterrupted display of the location according to direction and distance in a moving station

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1023798B (en) * 1955-07-04 1958-02-06 Int Standard Electric Corp Radio navigation system for the uninterrupted display of the location according to direction and distance in a moving station

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