GB563075A - Improvements in radio beacons - Google Patents

Improvements in radio beacons

Info

Publication number
GB563075A
GB563075A GB13289/40A GB1328940A GB563075A GB 563075 A GB563075 A GB 563075A GB 13289/40 A GB13289/40 A GB 13289/40A GB 1328940 A GB1328940 A GB 1328940A GB 563075 A GB563075 A GB 563075A
Authority
GB
United Kingdom
Prior art keywords
radiators
energized
radiating
conductors
length
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
GB13289/40A
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
Publication of GB563075A publication Critical patent/GB563075A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q1/00—Details of, or arrangements associated with, antennas
    • H01Q1/48—Earthing means; Earth screens; Counterpoises
    • 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
    • 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
    • G01S3/08—Means for reducing polarisation errors, e.g. by use of Adcock or spaced loop antenna systems
    • G01S3/085—Means for reducing polarisation errors, e.g. by use of Adcock or spaced loop antenna systems by using spaced loop aerial systems

Landscapes

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

Abstract

563,075. Directive wireless signalling. STANDARD TELEPHONES & CABLES, Ltd. Aug. 21, 1940, No. 13289. Convention date, Oct. 19, 1939. [Class 40 (v)] A four-course radio beacon comprises two pairs of radiators 101, 103 and 102, 104, each radiator radiating horizontally polarized waves and being arranged at the corners of a square, the diagonal of which is about a half wavelength. A carrier-frequency generator 110 is alternately connected by switch 111 and shielded transmission lines 105, 107 to the pairs of radiators so that intersecting radiation patterns of horizontally polarized energy are produced. The radiators of each pair are spaced apart by half a wave-length and energized in phase opposition (because of the transposition at 108) so that each pair produces a figure-of-8 radiation pattern. The two figureof-8 patterns overlap so that four guide lines are provided where the 'signals from two adjacent radiators will be equal. Each radiator comprises four radiating conductors 1, 2, 3, 4, opposite conductors 1, 3 and 2, 4 being energized in phase opposition. The overall length of each conductor is about one half the wavelength, the radiating portions of the conductors being less than a quarter of a wave-length, so that the radiating portions are uniformly energized. The keying means 112 may produce A-N or other interlocking signals. To 'avoid distortion due to reflection or re-radiation by adjacent objects, the radiators are at some height above the earth's surface and a conducting screen 210, Fig. 2, is arranged between the radiators and the cross-connections 207, 208 connected to the transmission lines 211, 212. The screening of the connections 207, 208 extends through the screen 210 up to the radiators. The construction of the individual radiators, such as 101, is more fully described in Specification 538,036.
GB13289/40A 1939-10-19 1940-08-21 Improvements in radio beacons Expired GB563075A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US300167A US2270401A (en) 1939-10-19 1939-10-19 Radio beacon shielding arrangement

Publications (1)

Publication Number Publication Date
GB563075A true GB563075A (en) 1944-07-28

Family

ID=23157992

Family Applications (1)

Application Number Title Priority Date Filing Date
GB13289/40A Expired GB563075A (en) 1939-10-19 1940-08-21 Improvements in radio beacons

Country Status (4)

Country Link
US (1) US2270401A (en)
BE (1) BE474310A (en)
FR (1) FR868229A (en)
GB (1) GB563075A (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL86928C (en) * 1946-02-05

Also Published As

Publication number Publication date
FR868229A (en) 1941-12-24
US2270401A (en) 1942-01-20
BE474310A (en)

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