GB1233593A - - Google Patents

Info

Publication number
GB1233593A
GB1233593A GB1233593DA GB1233593A GB 1233593 A GB1233593 A GB 1233593A GB 1233593D A GB1233593D A GB 1233593DA GB 1233593 A GB1233593 A GB 1233593A
Authority
GB
United Kingdom
Prior art keywords
aerial
radiates
frequency
aerials
tacan
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
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 filed Critical
Publication of GB1233593A publication Critical patent/GB1233593A/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
    • G01S13/78—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
    • G01S13/785—Distance Measuring Equipment [DME] systems
    • G01S13/787—Distance Measuring Equipment [DME] systems co-operating with direction defining beacons
    • 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
    • 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
    • G01S1/08—Systems for determining direction or position line
    • G01S1/44—Rotating or oscillating beam beacons defining directions in the plane of rotation or oscillation
    • G01S1/46—Broad-beam systems producing at a receiver a substantially continuous sinusoidal envelope signal of the carrier wave of the beam, the phase angle of which is dependent upon the angle between the direction of the receiver from the beacon and a reference direction from the beacon, e.g. cardioid system
    • G01S1/465—Broad-beam systems producing at a receiver a substantially continuous sinusoidal envelope signal of the carrier wave of the beam, the phase angle of which is dependent upon the angle between the direction of the receiver from the beacon and a reference direction from the beacon, e.g. cardioid system using time-varying interference fields

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)
  • Variable-Direction Aerials And Aerial Arrays (AREA)

Abstract

1,233,593. Radio navigation. INTERNATIONAL STANDARD ELECTRIC CORP. 23 May, 1968 [31 May, 1967], No. 24690/68. Heading H4D. In a sector radio beacon a first aerial radiates on frequency F, a second aerial radiates on frequency F +f (or F-f) and is spaced from the first aerial by a distance d determined by the wavelength # corresponding to F and the desired sector width, and a third aerial radiates on frequency F + nf (or F-nf) where n is an integer greater than unity, and the spacing between first and third aerials is nd. The aerials may be collinear or, to reduce backward radiation, the first aerial is offset forward of the line joining the other two by #/4. In an embodiment d = 5#/#, f= 15 Hz. and nf= 135 Hz., for use with a TACAN receiver. The first aerial is modulated with transponder reply pulses or random pulses as in TACAN. A further aerial, on the other side of the first aerial relative to the second aerial, may be added and radiates on F - 15 Hz. if the second aerial radiates on F+15 Hz., or vice-versa. Reference pulse trains are radiated by the first aerial. The beacon may be utilized for aircraft approach.
GB1233593D 1967-05-31 1968-05-23 Expired GB1233593A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DEST026949 1967-05-31
DEST027975 1968-03-08

Publications (1)

Publication Number Publication Date
GB1233593A true GB1233593A (en) 1971-05-26

Family

ID=25994496

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1233593D Expired GB1233593A (en) 1967-05-31 1968-05-23

Country Status (2)

Country Link
DE (2) DE1591610B1 (en)
GB (1) GB1233593A (en)

Also Published As

Publication number Publication date
DE1616532B1 (en) 1972-03-23
DE1591610B1 (en) 1970-10-15

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Legal Events

Date Code Title Description
PS Patent sealed
PCNP Patent ceased through non-payment of renewal fee