GB656852A - Improvements in or relating to antenna - Google Patents

Improvements in or relating to antenna

Info

Publication number
GB656852A
GB656852A GB5948/48A GB594848A GB656852A GB 656852 A GB656852 A GB 656852A GB 5948/48 A GB5948/48 A GB 5948/48A GB 594848 A GB594848 A GB 594848A GB 656852 A GB656852 A GB 656852A
Authority
GB
United Kingdom
Prior art keywords
pattern
radiator
reflector
radiators
cosec
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
GB5948/48A
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.)
US Department of Commerce
Original Assignee
US Department of Commerce
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 US Department of Commerce filed Critical US Department of Commerce
Publication of GB656852A publication Critical patent/GB656852A/en
Expired legal-status Critical Current

Links

Classifications

    • 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
    • H01Q19/10—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 reflecting surfaces
    • H01Q19/12—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 reflecting surfaces wherein the surfaces are concave
    • H01Q19/17—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 reflecting surfaces wherein the surfaces are concave the primary radiating source comprising two or more radiating elements

Landscapes

  • Aerials With Secondary Devices (AREA)
  • Variable-Direction Aerials And Aerial Arrays (AREA)

Abstract

656,852. Directive radio systems. DEPARTMENT OF COMMERCE, DIRECTOR OF THE OFFICE OF TECHNICAL SERVICES OF. Feb. 27, 1948, No. 5948. Convention date, July 9, 1945. [Class 40 (vii)] An antenna system comprises a plurality of equally-spaced coplanar radiation sources, a parabolic reflector for reflecting the energy radiated therefrom and means for adjusting the amount of energy radiated from each of the sources. Such an antenna system is of use for transmission and reception in an aircraft radar system and may be adjusted to give a cosec<SP>2</SP> # radiation pattern over an angle of 30 to 40 degrees, as shown at 11 (Fig. 1). Such a pattern enables echoes of substantially equal intensity to be obtained from an object 12 on the earth's surface at whatever angle of depression 6 it happens to be within the pattern. In one embodiment of the system a magnetron oscillator 20 is connected to waveguide 19 which is provided with a series of radiators 18 equally spaced and in the focal plane of the paraboloidal reflector 17. The lowest radiator is on the axis of the reflector and the other radiators placed at intervals of 2/ 3 A above it to produce a cosec<SP>2</SP> pattern covering about 30 degrees. For such a pattern the radiator next to the axis radiator is arranged to radiate half the energy of that radiator, the next a third, and so on. The reflector aperture is preferably large compared with the length of the array. If desired the system of Fig. 4 may be mounted for scanning in azimuth. The radiators may comprise dipoles energized by probes projecting into waveguide 19 by an adjustable length, Figs. 6 and 7 (not shown).
GB5948/48A 1945-07-09 1948-02-27 Improvements in or relating to antenna Expired GB656852A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US604025A US2689305A (en) 1945-07-09 1945-07-09 Antenna

Publications (1)

Publication Number Publication Date
GB656852A true GB656852A (en) 1951-09-05

Family

ID=24417876

Family Applications (1)

Application Number Title Priority Date Filing Date
GB5948/48A Expired GB656852A (en) 1945-07-09 1948-02-27 Improvements in or relating to antenna

Country Status (2)

Country Link
US (1) US2689305A (en)
GB (1) GB656852A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1268224B (en) * 1960-05-07 1968-05-16 Telefunken Patent Directional antenna
GB2221538A (en) * 1988-08-06 1990-02-07 Richard Edwin Byrne Detector for detecting filler in vehicle bodywork

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2976331A (en) * 1957-07-31 1961-03-21 Exxon Research Engineering Co Preparation of aromatics
US4270129A (en) * 1979-01-30 1981-05-26 Sperry Corporation Apparatus and method for realizing preselected free space antenna patterns

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1301473A (en) * 1919-02-26 1919-04-22 Marconi Wireless Telegraph Co America Reflector for use in wireless telegraphy and telephony.
US2106771A (en) * 1935-09-11 1938-02-01 American Telephone & Telegraph Ultrahigh frequency signaling
US2605413A (en) * 1943-11-10 1952-07-29 Luis W Alvarez Antenna system with variable directional characteristic
US2480208A (en) * 1944-06-27 1949-08-30 Us Sec War Radio distance and direction indicator
US2436380A (en) * 1944-09-23 1948-02-24 Bell Telephone Labor Inc Rapid sweep radiating system
US2458885A (en) * 1944-12-15 1949-01-11 Bell Telephone Labor Inc Directive antenna system

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1268224B (en) * 1960-05-07 1968-05-16 Telefunken Patent Directional antenna
GB2221538A (en) * 1988-08-06 1990-02-07 Richard Edwin Byrne Detector for detecting filler in vehicle bodywork

Also Published As

Publication number Publication date
US2689305A (en) 1954-09-14

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