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GB1224246A - Improvements in or relating to antenna system - Google Patents

Improvements in or relating to antenna system

Info

Publication number
GB1224246A
GB1224246A GB25890/68A GB2589068A GB1224246A GB 1224246 A GB1224246 A GB 1224246A GB 25890/68 A GB25890/68 A GB 25890/68A GB 2589068 A GB2589068 A GB 2589068A GB 1224246 A GB1224246 A GB 1224246A
Authority
GB
United Kingdom
Prior art keywords
arrays
array
dipole
backward radiation
lobes
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
GB25890/68A
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.)
Sintef AS
Original Assignee
Sintef AS
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 Sintef AS filed Critical Sintef AS
Publication of GB1224246A publication Critical patent/GB1224246A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q21/00—Antenna arrays or systems
    • H01Q21/06—Arrays of individually energised antenna units similarly polarised and spaced apart
    • H01Q21/22—Antenna units of the array energised non-uniformly in amplitude or phase, e.g. tapered array or binomial array
    • 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
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q11/00—Electrically-long antennas having dimensions more than twice the shortest operating wavelength and consisting of conductive active radiating elements
    • H01Q11/02—Non-resonant antennas, e.g. travelling-wave antenna
    • H01Q11/10—Logperiodic antennas
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q19/00—Combinations of primary active antenna elements and units with secondary devices, e.g. with quasi-optical devices, for giving the antenna a desired directional characteristic
    • H01Q19/28—Combinations of primary active antenna elements and units with secondary devices, e.g. with quasi-optical devices, for giving the antenna a desired directional characteristic using a secondary device in the form of two or more substantially straight conductive elements
    • H01Q19/30—Combinations of primary active antenna elements and units with secondary devices, e.g. with quasi-optical devices, for giving the antenna a desired directional characteristic using a secondary device in the form of two or more substantially straight conductive elements the primary active element being centre-fed and substantially straight, e.g. Yagi antenna
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q21/00—Antenna arrays or systems
    • H01Q21/06—Arrays of individually energised antenna units similarly polarised and spaced apart
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q21/00—Antenna arrays or systems
    • H01Q21/06—Arrays of individually energised antenna units similarly polarised and spaced apart
    • H01Q21/08—Arrays of individually energised antenna units similarly polarised and spaced apart the units being spaced along or adjacent to a rectilinear path

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Radar, Positioning & Navigation (AREA)
  • Remote Sensing (AREA)
  • Variable-Direction Aerials And Aerial Arrays (AREA)
  • Casting Or Compression Moulding Of Plastics Or The Like (AREA)

Abstract

1,224,246. Aerials; radio navigation. SINTEF. 30 May, 1968 [8 June, 1967], No. 25890/68. Headings H4A and H4D. An I. L. S. localizer aerial system comprises a plurality of dipole arrays. In each array all or most of the dipoles have lengths and spacings which conform with those of a log-periodic array. As described, an aerial system comprises six separate aerial arrays 1 to 6, Fig. 1. Each array consists of dipoles arranged in general with lengths and spacings according to a logperiodic law. However, in order to enhance backward radiation from the system, the length and spacing of at least one dipole of an array is deviated from the exact log-periodic relationship. The system is arranged at one end of an airfield runway to provide azimuthal guidance for an instrument landing system. The arrays are spaced symmetrically about the centre line S of the runway, with their axes parallel thereto. The same modifications may be made to all the arrays, when their backward radiation lobes 1a to 6a will be the same. The back course sector width may be increased by modifying the arrays 1, 2, 5, 6 differently from the arrays 3, 4 so that the backward radiation lobes 1b, 2b, 5b, 6b are smaller than the lobes 3a, 4a. An arrangement is described in which a feedline for a dipole array comprises two metal tubes which support the dipole arms and which are spaced apart by dielectric material and are enclosed in a coating of dielectric material (Fig 3, not shown). In addition to providing means for controlling backward radiation, the system is also intended to reduce course line aberrations due to unwanted reflections &c.
GB25890/68A 1967-06-08 1968-05-30 Improvements in or relating to antenna system Expired GB1224246A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NO168528A NO124503B (en) 1967-06-08 1967-06-08

Publications (1)

Publication Number Publication Date
GB1224246A true GB1224246A (en) 1971-03-03

Family

ID=19910103

Family Applications (1)

Application Number Title Priority Date Filing Date
GB25890/68A Expired GB1224246A (en) 1967-06-08 1968-05-30 Improvements in or relating to antenna system

Country Status (6)

Country Link
US (1) US3518673A (en)
DE (1) DE1766526B1 (en)
FR (1) FR1567838A (en)
GB (1) GB1224246A (en)
NO (1) NO124503B (en)
SE (1) SE352173B (en)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3868689A (en) * 1973-07-30 1975-02-25 Texas Instruments Inc Log periodic pole mounted marker beacon antenna
JPS602628B2 (en) * 1977-12-05 1985-01-23 株式会社東芝 Aircraft landing guidance system
DE4446128A1 (en) * 1994-12-23 1996-06-27 Sel Alcatel Ag antenna
US10837479B2 (en) 2017-02-14 2020-11-17 Whirlpool Corporation Multi-layer encapsulation system for joint sealing of vacuum insulated cabinets

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2513493A (en) * 1945-09-17 1950-07-04 Honeywell Regulator Co Aircraft control system
US2593485A (en) * 1948-02-06 1952-04-22 Int Standard Electric Corp Localizer beacon system
US2993665A (en) * 1948-09-15 1961-07-25 Honeywell Regulator Co Automatic instrument landing systems for air-borne craft
US3147479A (en) * 1962-03-01 1964-09-01 Radiation Inc Plural juxtaposed parabolic reflectors with frequency independent feeds
US3257661A (en) * 1962-04-11 1966-06-21 Robert L Tanner Log-periodic antenna
GB987470A (en) * 1962-06-13 1965-03-31 Secr Aviation Improvements in or relating to aircraft approach and landing systems

Also Published As

Publication number Publication date
FR1567838A (en) 1969-04-08
SE352173B (en) 1972-12-18
US3518673A (en) 1970-06-30
DE1766526B1 (en) 1971-10-07
NO124503B (en) 1972-04-24

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