GB1318064A - Short wave radio direction finders - Google Patents

Short wave radio direction finders

Info

Publication number
GB1318064A
GB1318064A GB3856970A GB3856970A GB1318064A GB 1318064 A GB1318064 A GB 1318064A GB 3856970 A GB3856970 A GB 3856970A GB 3856970 A GB3856970 A GB 3856970A GB 1318064 A GB1318064 A GB 1318064A
Authority
GB
United Kingdom
Prior art keywords
aerial
dipoles
finding
sense
axis
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
GB3856970A
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.)
Licentia Patent Verwaltungs GmbH
Original Assignee
Licentia Patent Verwaltungs GmbH
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
Priority claimed from DE19691957787 external-priority patent/DE1957787C/en
Application filed by Licentia Patent Verwaltungs GmbH filed Critical Licentia Patent Verwaltungs GmbH
Publication of GB1318064A publication Critical patent/GB1318064A/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
    • H01Q21/20—Arrays of individually energised antenna units similarly polarised and spaced apart the units being spaced along or adjacent to a curvilinear path
    • H01Q21/205—Arrays of individually energised antenna units similarly polarised and spaced apart the units being spaced along or adjacent to a curvilinear path providing an omnidirectional coverage
    • 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
    • G01S3/00—Direction-finders for determining the direction from which infrasonic, sonic, ultrasonic, or electromagnetic waves, or particle emission, not having a directional significance, are being received
    • G01S3/02—Direction-finders for determining the direction from which infrasonic, sonic, ultrasonic, or electromagnetic waves, or particle emission, not having a directional significance, are being received using radio waves
    • G01S3/04—Details
    • G01S3/12—Means for determining sense of direction, e.g. by combining signals from directional antenna or goniometer search coil with those from non-directional 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
    • H01Q21/20—Arrays of individually energised antenna units similarly polarised and spaced apart the units being spaced along or adjacent to a curvilinear path
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q9/00—Electrically-short antennas having dimensions not more than twice the operating wavelength and consisting of conductive active radiating elements
    • H01Q9/04—Resonant antennas
    • H01Q9/16—Resonant antennas with feed intermediate between the extremities of the antenna, e.g. centre-fed dipole
    • H01Q9/28—Conical, cylindrical, cage, strip, gauze, or like elements having an extended radiating surface; Elements comprising two conical surfaces having collinear axes and adjacent apices and fed by two-conductor transmission lines
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q9/00—Electrically-short antennas having dimensions not more than twice the operating wavelength and consisting of conductive active radiating elements
    • H01Q9/04—Resonant antennas
    • H01Q9/44—Resonant antennas with a plurality of divergent straight elements, e.g. V-dipole, X-antenna; with a plurality of elements having mutually inclined substantially straight portions

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • General Physics & Mathematics (AREA)
  • Radar, Positioning & Navigation (AREA)
  • Remote Sensing (AREA)
  • Variable-Direction Aerials And Aerial Arrays (AREA)
  • Aerials With Secondary Devices (AREA)

Abstract

1318064 Aerials; radio direction-finders LICENTIA PATENT - VERWALTUNGSGmbH 11 Aug 1970 [18 Nov 1969] 38569/70 Headings H4A and H4D In an H.F. direction-finder a sense aerial comprises at least one pair of dipoles which in operation are connected in parallel and which are disposed symmetrically in relation to each other and to a central axis. The dipoles, which are co-planar with said axis, each consist of two linear elements flaring outwardly from a feed centre so that each element makes an acute angle, for example, 30 degrees, with the axis. As described, two pairs of dipoles containing elements 1, 2, Fig. 3, are disposed in orthogonal vertical planes, but the numbers of pairs may be increased until, in the limit, two truncated cones are formed (Fig. 4, not shown). The dipoles are fixed to a non-conductive housing 5 which is on top of a mast 6, and which contains a ferrite direction-finding aerial. A V.H.F. direction-finding aerial 8 may be arranged above the H.F. direction-finding aerial and the cable for the former may be led in a crossed loop 4 past the latter. If desired, the crossed loop 4 may also be used as a direction-finding aerial. A two-pole network may be inserted in the feed lines of the sense aerial to improve decoupling with respect to the V.H.F. aerial. Also, a balanced variable capacitor, which may be remotely controlled, may be provided for the sense aerial, the rotor thereof being connected to earth (Fig. 1, not shown).
GB3856970A 1969-11-18 1970-08-11 Short wave radio direction finders Expired GB1318064A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19691957787 DE1957787C (en) 1969-11-18 Shortwave antenna arrangement for obtaining a round voltage in direction finding systems, in particular ship direction finding systems

Publications (1)

Publication Number Publication Date
GB1318064A true GB1318064A (en) 1973-05-23

Family

ID=5751367

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3856970A Expired GB1318064A (en) 1969-11-18 1970-08-11 Short wave radio direction finders

Country Status (3)

Country Link
US (1) US3691561A (en)
FR (1) FR2067368B1 (en)
GB (1) GB1318064A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2191043A (en) * 1986-05-28 1987-12-02 Gen Electric Co Plc Dipole array

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4588993A (en) * 1980-11-26 1986-05-13 The United States Of America As Represented By The Secretary Of The Department Of Health And Human Services Broadband isotropic probe system for simultaneous measurement of complex E- and H-fields
US4598296A (en) * 1984-07-31 1986-07-01 Chu Associates, Inc. Dipole antenna system with overhead coverage having equidirectional-linear polarization
US5038151A (en) * 1989-07-31 1991-08-06 Loral Aerospace Corp. Simultaneous transmit and receive antenna
US5523767A (en) * 1993-02-17 1996-06-04 The United States Of America As Represented By The Secretary Of The Army Wideband dual-polarized tilted dipole antenna
US5959548A (en) * 1997-10-31 1999-09-28 Halliburton Energy Services, Inc. Electromagnetic signal pickup device
FR2802711B1 (en) * 1999-12-20 2003-04-04 Univ Rennes METHOD FOR DECOUPLING ANTENNAS WITHIN A CO-LOCALIZED ANTENNA SYSTEM, SENSOR AND APPLICATIONS THEREOF
US6480168B1 (en) 2000-09-19 2002-11-12 Lockheed Martin Corporation Compact multi-band direction-finding antenna system
IL256632B (en) * 2017-12-27 2022-05-01 Elta Systems Ltd Direction finder antenna system

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE420226A (en) * 1936-02-26
US2175252A (en) * 1937-06-12 1939-10-10 Rca Corp Short wave antenna
US2440597A (en) * 1945-02-10 1948-04-27 Du Mont Allen B Lab Inc Television receiver antenna
US2964747A (en) * 1958-07-21 1960-12-13 Radiation Inc Vee antenna
US2968038A (en) * 1959-02-19 1961-01-10 Hauptschein Arthur Multiband tail-cap antenna
US3159838A (en) * 1962-01-19 1964-12-01 Aero Geo Astro Corp Vertically stacked hollow dipoles conductively supported on a mast
US3262121A (en) * 1963-05-06 1966-07-19 Collins Radio Co Antenna feed point crossover
US3371347A (en) * 1966-04-06 1968-02-27 Control Data Corp Direction finding antenna system
US3521286A (en) * 1967-04-21 1970-07-21 Gen Dynamics Corp Orthogonal array antenna system

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2191043A (en) * 1986-05-28 1987-12-02 Gen Electric Co Plc Dipole array

Also Published As

Publication number Publication date
DE1957787B2 (en) 1971-11-04
FR2067368B1 (en) 1979-08-17
DE1957787A1 (en) 1971-05-19
US3691561A (en) 1972-09-12
FR2067368A1 (en) 1971-08-20

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Legal Events

Date Code Title Description
PS Patent sealed [section 19, patents act 1949]