GB1227687A - - Google Patents

Info

Publication number
GB1227687A
GB1227687A GB1227687DA GB1227687A GB 1227687 A GB1227687 A GB 1227687A GB 1227687D A GB1227687D A GB 1227687DA GB 1227687 A GB1227687 A GB 1227687A
Authority
GB
United Kingdom
Prior art keywords
horn
waves
plates
shown
band
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
Priority to JP8041768A priority Critical patent/JPS521258B1/ja
Priority to JP4498069A priority patent/JPS5028784B1/ja
Application filed filed Critical
Publication of GB1227687A publication Critical patent/GB1227687A/en
Application status is Expired legal-status Critical

Links

Classifications

    • HELECTRICITY
    • H01BASIC ELECTRIC ELEMENTS
    • H01QANTENNAS, i.e. RADIO AERIALS
    • H01Q13/00Waveguide horns or mouths; Slot antennas; Leaky-waveguide antennas; Equivalent structures causing radiation along the transmission path of a guided wave
    • H01Q13/02Waveguide horns
    • H01Q13/025Multimode horn antennas; Horns using higher mode of propagation
    • HELECTRICITY
    • H01BASIC ELECTRIC ELEMENTS
    • H01QANTENNAS, i.e. RADIO AERIALS
    • H01Q19/00Combinations of primary active antenna elements and units with secondary devices, e.g. with quasi-optical devices, for giving the antenna a desired directional characteristic
    • H01Q19/06Combinations 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 refracting or diffracting devices, e.g. lens
    • H01Q19/08Combinations 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 refracting or diffracting devices, e.g. lens for modifying the radiation pattern of a radiating horn in which it is located

Abstract

1,227,687. Aerials. KOKUSAI DENSHIN DENWA K.K. 4 Nov., 1969 [5 Nov., 1968; 7 June, 1969], No. 53966/69. Heading H4A. In a horn aerial produced by flaring out the end of a waveguide into the shape of a horn, a plate or plates of dielectric material is or are disposed as a layer or layers on the inner surface of the horn symmetrically about its axis. As described, a circular band 3, Fig. 5, of polytetrafluoroethylene is seated on the inner surface of a conical horn 1, which is fed by a circular waveguide 2. By proper choice of the dimensions and location of the band 3, the phase patterns in the E- and H-planes may be substantially equalized, and side-lobes reduced (Fig. 3, not shown) over a wide frequency range. By providing a further circular band of dielectric material 5 adjacent the mouth of the horn the radiated beam may be made flat-topped (Fig. 6, not shown), which is particularly desirable when the horn is used to illuminate the subreflector of a Cassegrain aerial system. The embodiment shown in Fig. 5 is effective with waves of any kind of polarization, but with waves linearly polarized in a particular direction, portions of the band 3 perpendicular to that direction may be removed (Fig. 7, not shown). In another embodiment, for handling two waves of different mean frequencies and of orthogonal linear polarizations, a rectangular waveguide 2, Fig. 8, is associated with a quadrilateral-pyramidal horn 1, and two pairs of plates of dielectric material 3a, 3b and 3c, 3d are disposed, respectively, on the upper and lower, and on the right and left inner surfaces of the horn. The plates 3a, 3b are effective for vertically polarized waves, and the plates 3c, 3d are effective for horizontally polarized waves.
GB1227687D 1968-11-05 1969-11-04 Expired GB1227687A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
JP8041768A JPS521258B1 (en) 1968-11-05 1968-11-05
JP4498069A JPS5028784B1 (en) 1969-06-07 1969-06-07

Publications (1)

Publication Number Publication Date
GB1227687A true GB1227687A (en) 1971-04-07

Family

ID=26384939

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1227687D Expired GB1227687A (en) 1968-11-05 1969-11-04

Country Status (2)

Country Link
US (1) US3624655A (en)
GB (1) GB1227687A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2365220A1 (en) * 1976-09-16 1978-04-14 Hughes Aircraft Co horn antenna

Families Citing this family (90)

* Cited by examiner, † Cited by third party
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US4141013A (en) * 1976-09-24 1979-02-20 Hughes Aircraft Company Integrated circularly polarized horn antenna
US4219777A (en) * 1977-12-05 1980-08-26 David Richardson Detector for multiplicity of radio wave frequencies
US4568943A (en) * 1983-05-31 1986-02-04 Rca Corporation Antenna feed with mode conversion and polarization conversion means
US4510469A (en) * 1983-05-31 1985-04-09 Rca Corporation Selective waveguide mode converter
IT210401Z2 (en) * 1987-06-11 1988-12-30 Irte Spa horn lighting for reflector antennas with a rectangular radiation pattern.
US4965869A (en) * 1987-06-23 1990-10-23 Brunswick Corporation Aperture antenna having nonuniform resistivity
WO1989006446A1 (en) * 1988-01-11 1989-07-13 Rho Delta Corporation Multimode dielectric-loaded multi-flare antenna
US6480164B2 (en) 2000-08-03 2002-11-12 Ronald S. Posner Corrective dielectric lens feed system
CA2470281A1 (en) * 2003-06-24 2004-12-24 Her Majesty In Right Of Canada As Represented By The Minister Of Nationa L Defence Multiple phase center feedhorn for reflector antenna
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DE1084787B (en) * 1959-04-17 1960-07-07 Telefunken Gmbh Horn radiator for circularly or elliptically polarized waves
US3500258A (en) * 1968-12-18 1970-03-10 Bell Telephone Labor Inc Wave mode converter

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2365220A1 (en) * 1976-09-16 1978-04-14 Hughes Aircraft Co horn antenna

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Publication number Publication date
US3624655A (en) 1971-11-30

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PS Patent sealed
PE20 Patent expired after termination of 20 years