GB983845A - Omnirange beacon antenna - Google Patents

Omnirange beacon antenna

Info

Publication number
GB983845A
GB983845A GB34044/61A GB3404461A GB983845A GB 983845 A GB983845 A GB 983845A GB 34044/61 A GB34044/61 A GB 34044/61A GB 3404461 A GB3404461 A GB 3404461A GB 983845 A GB983845 A GB 983845A
Authority
GB
United Kingdom
Prior art keywords
band
parasitic
parasitic elements
elements
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
GB34044/61A
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 GB983845A publication Critical patent/GB983845A/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)
  • Waveguide Aerials (AREA)
  • Variable-Direction Aerials And Aerial Arrays (AREA)
  • Aerials With Secondary Devices (AREA)

Abstract

983,845. Aerials. STANDARD TELEPHONES & CABLES Ltd. Sept. 22, 1961 [Oct. 13, 1960], No. 34044/61. Heading H4A. In an omnirange beacon aerial (for a TACAN beacon) a radiator 2, Fig. 2, illuminates parasitic elements 3, 4 and short-circuited transmission lines 6, 10 only are connected to the parasitic elements such that in one frequency band (Fig. 1, not shown) parasitic element 3 is effective, and element 4 is not and vice-versa in a lower frequency band. Element 3 comprises parts 3A, 3B; length LP is made 0.633 # 2 , where # 2 is the wavelength corresponding to the midfrequency F 2 of the higher band, and mutatis mutandis for length LP<SP>1</SP> of element 4. The parasitic elements may be of conductive or dielectric material. Length L 1 of line 10 is chosen such that terminals 11, 12 of element 4 " see " a substantially short-circuit over the lower frequency band; re-radiation by element 4 is then a maximum, affording an enhancement in the radiation polar diagram. Length L 2 of line 9 is chosen similarly for the higher frequency band. A discussion of the calculation of lengths L 1 , L 2 is given. A parasitic element operable in one band is effectively removed in the other band; preferably L 2 = 1.5# 2 and similarly for L 1 . In a further embodiment, Figs. 3, 4, 5, the parasitic elements 32, 33 are on or embedded in respective dielectric cylinders 26, 27 for rotation bodily about central radiator 18, 19, a dielectric supporting plate 25 being mounted on rotating dielectric cylinder 24. Each parasitic element group comprises nine elements with associated transmission lines 42, 47; R.F. interference between the lines is obviated by equal portions 48A, 48B being parallel and equidistant from line 42. Hence the parasitic elements of the two groups can be placed in line. The calculation of the dimensions of the lines is given; radii R 3 , R 4 are chosen as described in Specification 842,063. In another embodiment different members of parasitic elements are utilized in the two frequency bands, Figs. 6 and 7 (neither shown); six high-band parasitic elements afford sixth harmonic modulation and nine low-band elements afford ninth harmonic modulation.
GB34044/61A 1960-10-13 1961-09-22 Omnirange beacon antenna Expired GB983845A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US62437A US3136996A (en) 1960-10-13 1960-10-13 Omnirange beacon antenna

Publications (1)

Publication Number Publication Date
GB983845A true GB983845A (en) 1965-02-17

Family

ID=22042477

Family Applications (1)

Application Number Title Priority Date Filing Date
GB34044/61A Expired GB983845A (en) 1960-10-13 1961-09-22 Omnirange beacon antenna

Country Status (4)

Country Link
US (1) US3136996A (en)
BE (1) BE609108A (en)
DE (1) DE1202355B (en)
GB (1) GB983845A (en)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3935576A (en) * 1974-06-03 1976-01-27 E-Systems, Inc. Broadband beacon antenna system
US4378558A (en) * 1980-08-01 1983-03-29 The Boeing Company Endfire antenna arrays excited by proximity coupling to single wire transmission line
EP0601576B1 (en) * 1992-12-09 1999-09-01 Matsushita Electric Industrial Co., Ltd. Antenna system for mobile communication
FI973785A (en) * 1996-09-26 1998-03-27 Texas Instruments Inc Compact, high-gain array antenna for personal communication systems

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2189910A (en) * 1936-08-25 1940-02-13 Lorenz C Ag Antenna arrangement
US2204175A (en) * 1939-01-19 1940-06-11 Rca Corp Antenna system
GB790576A (en) * 1955-11-23 1958-02-12 Gordon Alfred Bird Improvements in and relating to aerial systems
US2928087A (en) * 1957-08-19 1960-03-08 Itt Omnidirectional beacon antenna

Also Published As

Publication number Publication date
DE1202355B (en) 1965-10-07
US3136996A (en) 1964-06-09
BE609108A (en) 1962-04-13

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