GB982180A - Antenna system - Google Patents

Antenna system

Info

Publication number
GB982180A
GB982180A GB2728761A GB2728761A GB982180A GB 982180 A GB982180 A GB 982180A GB 2728761 A GB2728761 A GB 2728761A GB 2728761 A GB2728761 A GB 2728761A GB 982180 A GB982180 A GB 982180A
Authority
GB
United Kingdom
Prior art keywords
aerial
aerials
direction finding
ground
radio
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
GB2728761A
Inventor
Charles William Earp
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.)
STC PLC
Original Assignee
Standard Telephone and Cables 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 Standard Telephone and Cables PLC filed Critical Standard Telephone and Cables PLC
Priority to GB2728761A priority Critical patent/GB982180A/en
Publication of GB982180A publication Critical patent/GB982180A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q3/00—Arrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system
    • H01Q3/12—Arrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system using mechanical relative movement between primary active elements and secondary devices of antennas or antenna systems
    • H01Q3/14—Arrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system using mechanical relative movement between primary active elements and secondary devices of antennas or antenna systems for varying the relative position of primary active element and a refracting or diffracting device
    • 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)
  • Aerials With Secondary Devices (AREA)

Abstract

982,180. Radio position and direction finding; aerial systems. STANDARD TELEPHONES AND CABLES Ltd. July 27, 1961, No. 27287/61. Headings H4A and H4D. An aerial system for a radio beacon or direction finding apparatus comprises two antennµ arranged one vertically above the other, the distance between them and the difference in length of couplings to a common feed point being chosen so that a lobe of one antenna pattern coincides with a null of the other. Aerials 1, 2 are so spaced and the feed paths 3, 4 so chosen that nulls of one radiation pattern due to reflection from the ground coincide with lobes of the other. The system operates by reducing ground reflections by providing an overall pattern in the absence of the ground which is largely above the horizon. Counterpoises may be placed below each aerial. The system is applicable to the radio beacons of Specifications 594,530 and 680,512 and the direction finding apparatus of Specification 899,951. In each case a second identical aerial system is placed vertically above the aerial system described in these Specifications and the aerials are fed typically 90 degrees out of phase. The aerials are spaced by from #/2 to #.
GB2728761A 1961-07-27 1961-07-27 Antenna system Expired GB982180A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB2728761A GB982180A (en) 1961-07-27 1961-07-27 Antenna system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB2728761A GB982180A (en) 1961-07-27 1961-07-27 Antenna system

Publications (1)

Publication Number Publication Date
GB982180A true GB982180A (en) 1965-02-03

Family

ID=10257134

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2728761A Expired GB982180A (en) 1961-07-27 1961-07-27 Antenna system

Country Status (1)

Country Link
GB (1) GB982180A (en)

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