GB1238200A - - Google Patents

Info

Publication number
GB1238200A
GB1238200A GB1238200DA GB1238200A GB 1238200 A GB1238200 A GB 1238200A GB 1238200D A GB1238200D A GB 1238200DA GB 1238200 A GB1238200 A GB 1238200A
Authority
GB
United Kingdom
Prior art keywords
sleeve
slots
line
segments
coupling
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
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 filed Critical
Publication of GB1238200A publication Critical patent/GB1238200A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q13/00—Waveguide horns or mouths; Slot antennas; Leaky-waveguide antennas; Equivalent structures causing radiation along the transmission path of a guided wave
    • H01Q13/08—Radiating ends of two-conductor microwave transmission lines, e.g. of coaxial lines, of microstrip lines
    • 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
    • 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
    • H01Q19/13—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 being a single radiating element, e.g. a dipole, a slot, a waveguide termination

Landscapes

  • Waveguide Aerials (AREA)
  • Aerials With Secondary Devices (AREA)

Abstract

1,238,200. Aerials. PATELHOLD PATENTVERWERTUNGS- & ELEKTRO-HOLDING A.G. 29 Nov., 1968 [1 Dec., 1967], No. 56879/68. Heading H4A. An aerial comprises a coaxial transmission line 2 the lower part 1 of the outer conductor 5 of which is subdivided into segments 6, 7 near its end by two diametrically opposite slots 3, 4 of lengths #‹/2 (# o = mean operating wavelength). The said lower part 1 is of larger internal diameter than the feeder line and a quarterwave transformer extending from the tops of the slots to a step 19 provides matching means. A transverse cross-sectional plane through the centres of the slots is termed the coupling plane, and a conductive member 9 centered thereon joins the segment 6 to the inner conductor 8 of the line. A short-circuiting disc 10 terminates the line at a distance of from 5/16#0 to 7/16 #0 from the coupling plane and provides capacitive coupling for the segment 7. The effective impedance valves of the couplings to the two segments are arranged to be equal and opposite at the mean operating frequency. A sleeve 13 has a base 16 which is level with the bottoms of the slots 3, 4 and it extends upwardly outside the outer conductor 5 of the line and past the slots. Additional coupling screw elements 11, 12 centered on the coupling plane are provided on the outsides of the segments 6, 7. An insulating cap on the sleeve 13 comprises a sleeve 17 and a frusto-conical end 18. Waves of the TE 11 mode are generated between the outer conductor 5 and the sleeve 13, and linearly polarized radiation is consequently directed upwardly. The aerial may be used as a primary feed for a parabolic reflector, and the insulating cap on the sleeve 13 may be so shaped as to improve the uniformity of illumination over the said reflector.
GB1238200D 1967-12-01 1968-11-29 Expired GB1238200A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH1692167A CH466383A (en) 1967-12-01 1967-12-01 Antenna for linearly polarized waves

Publications (1)

Publication Number Publication Date
GB1238200A true GB1238200A (en) 1971-07-07

Family

ID=4421371

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1238200D Expired GB1238200A (en) 1967-12-01 1968-11-29

Country Status (8)

Country Link
US (1) US3581311A (en)
AT (1) AT281923B (en)
CH (1) CH466383A (en)
DE (2) DE6608680U (en)
FR (1) FR1597774A (en)
GB (1) GB1238200A (en)
NL (1) NL6817091A (en)
SE (1) SE356640B (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0105677A1 (en) * 1982-09-27 1984-04-18 Kureha Kagaku Kogyo Kabushiki Kaisha Endotract antenna device for hyperthermia
US5861021A (en) * 1996-06-17 1999-01-19 Urologix Inc Microwave thermal therapy of cardiac tissue
US5938692A (en) * 1996-03-26 1999-08-17 Urologix, Inc. Voltage controlled variable tuning antenna

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4197549A (en) * 1977-08-17 1980-04-08 Harris Corporation Slot antenna
DE3049532A1 (en) * 1980-12-31 1982-07-29 Aeg-Telefunken Ag, 1000 Berlin Und 6000 Frankfurt Self-supporting primary radiator for reflector antenna - has metal ring and dielectric radiator to increase main side lobe attenuation
US4443804A (en) * 1981-09-28 1984-04-17 Ford Aerospace & Communications Corporation Modified difference mode coaxial antenna with flared aperture
EP0244969A3 (en) * 1986-05-02 1989-03-08 Borg-Warner Chemicals Europe BV Dbs antenna
EP0304722B1 (en) * 1987-08-12 1992-10-28 Siemens Aktiengesellschaft Directional antenna for relay systems
JPH0642610B2 (en) * 1988-02-19 1994-06-01 工業技術院長 Structure of primary radiator
US4907008A (en) * 1988-04-01 1990-03-06 Andrew Corporation Antenna for transmitting circularly polarized television signals
US4872211A (en) * 1988-08-10 1989-10-03 The United States Of America As Represented By The Secretary Of The Navy Dual frequency launcher for circularly polarized antenna
US6819297B2 (en) * 2002-07-10 2004-11-16 University Of Kansas Wideband planar antenna
DE202009012483U1 (en) 2009-09-14 2009-12-31 Airbus Operations Gmbh Device for coating thickness measurement by means of microwaves

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2465245A (en) * 1945-03-03 1949-03-22 Westinghouse Electric Corp Terminus for concentric transmission lines
US2694778A (en) * 1953-05-29 1954-11-16 Howard J Rowland Antenna
GB825532A (en) * 1955-09-03 1959-12-16 Mini Of Supply Improvements in or relating to radiating waveguide feeders for radio-frequency electromagnetic waves
US2954556A (en) * 1956-10-10 1960-09-27 Andrew Corp Cross polarized dual feed

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0105677A1 (en) * 1982-09-27 1984-04-18 Kureha Kagaku Kogyo Kabushiki Kaisha Endotract antenna device for hyperthermia
US5938692A (en) * 1996-03-26 1999-08-17 Urologix, Inc. Voltage controlled variable tuning antenna
US6032078A (en) * 1996-03-26 2000-02-29 Urologix, Inc. Voltage controlled variable tuning antenna
US5861021A (en) * 1996-06-17 1999-01-19 Urologix Inc Microwave thermal therapy of cardiac tissue

Also Published As

Publication number Publication date
US3581311A (en) 1971-05-25
SE356640B (en) 1973-05-28
NL6817091A (en) 1969-06-03
DE1616300A1 (en) 1971-04-01
DE1616300C2 (en) 1984-02-02
FR1597774A (en) 1970-06-29
CH466383A (en) 1968-12-15
AT281923B (en) 1970-06-10
DE6608680U (en) 1971-10-07

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Legal Events

Date Code Title Description
PS Patent sealed [section 19, patents act 1949]
746 Register noted 'licences of right' (sect. 46/1977)
PCNP Patent ceased through non-payment of renewal fee