GB876304A - Improvements in or relating to aerials with a variable beam direction - Google Patents

Improvements in or relating to aerials with a variable beam direction

Info

Publication number
GB876304A
GB876304A GB469060A GB469060A GB876304A GB 876304 A GB876304 A GB 876304A GB 469060 A GB469060 A GB 469060A GB 469060 A GB469060 A GB 469060A GB 876304 A GB876304 A GB 876304A
Authority
GB
United Kingdom
Prior art keywords
energy
groove
members
feed
round
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
GB469060A
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.)
Philips Electrical Industries Ltd
Original Assignee
Philips Electrical Industries Ltd
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 Philips Electrical Industries Ltd filed Critical Philips Electrical Industries Ltd
Publication of GB876304A publication Critical patent/GB876304A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q15/00—Devices for reflection, refraction, diffraction or polarisation of waves radiated from an antenna, e.g. quasi-optical devices
    • H01Q15/02—Refracting or diffracting devices, e.g. lens, prism
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q15/00—Devices for reflection, refraction, diffraction or polarisation of waves radiated from an antenna, e.g. quasi-optical devices
    • H01Q15/02—Refracting or diffracting devices, e.g. lens, prism
    • H01Q15/04—Refracting or diffracting devices, e.g. lens, prism comprising wave-guiding channel or channels bounded by effective conductive surfaces substantially perpendicular to the electric vector of the wave, e.g. parallel-plate waveguide lens
    • 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

Abstract

876,304. Aerials. PHILIPS ELECTRICAL INDUSTRIES Ltd. Feb. 10, 1960 [Feb. 13, 1959], No. 4690/60. Class 40(7) The invention relates to an aerial system of variable directivity comprising two spaced coaxial conductive members formed as surfaces of revolution between which energy is fed through a waveguide at a variable point along the peripheral gap between them, the shape and spacing of the members being such that a beam of energy is radiated in a plane at right angles to the axis of revolution at a position diametrically opposite the feed point. Such a system is sometimes known as a "Luneberg lens aerial". One form is shown in Figs. 1 and 2 where the two conductive members 1 and 2 are so shaped that energy from a peripheral feed point 5 travelling through the lens by various paths (such as 7, 8 or 9) produces in-phase radiation on the line 13 to give a collimated beam diametrically opposite the point 5. As shown in Fig. 1 the members 1 and 2 are provided with flared edges 3, 4 round the lens periphery and the waveguide feed is terminated in a wedge-shaped feed unit 18 movable round between these edges and having conductive surfaces spaced from and parallel to them. According to the invention a groove 19, 20 having a depth equal to a quarter of the operating wavelength is formed in the conductive surfaces of the unit 18, the groove extending round the outlet 5, of the guide at a distance of approximately an odd multiple of a quarter wavelength. The groove causes a high impedance to be presented to energy attempting to pass through the gaps between flared edges 3, 4 and unit 18. To further reduce back radiation the outer surfaces of the body 18 beyond the groove may be covered with a layer 21 of lossy material such as graphite.
GB469060A 1959-02-13 1960-02-10 Improvements in or relating to aerials with a variable beam direction Expired GB876304A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL236127 1959-02-13

Publications (1)

Publication Number Publication Date
GB876304A true GB876304A (en) 1961-08-30

Family

ID=19751578

Family Applications (1)

Application Number Title Priority Date Filing Date
GB469060A Expired GB876304A (en) 1959-02-13 1960-02-10 Improvements in or relating to aerials with a variable beam direction

Country Status (4)

Country Link
DE (1) DE1107298B (en)
FR (1) FR1248325A (en)
GB (1) GB876304A (en)
NL (1) NL283921A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3656165A (en) * 1968-09-18 1972-04-11 Univ Ohio State Res Found Lens polarization control
US4488156A (en) * 1982-02-10 1984-12-11 Hughes Aircraft Company Geodesic dome-lens antenna

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19652973A1 (en) * 1996-12-19 1998-06-25 Daimler Benz Ag Antenna arrangement, in particular for motor vehicles

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3656165A (en) * 1968-09-18 1972-04-11 Univ Ohio State Res Found Lens polarization control
US4488156A (en) * 1982-02-10 1984-12-11 Hughes Aircraft Company Geodesic dome-lens antenna

Also Published As

Publication number Publication date
FR1248325A (en) 1960-12-09
NL283921A (en)
DE1107298B (en) 1961-05-25

Similar Documents

Publication Publication Date Title
US3568204A (en) Multimode antenna feed system having a plurality of tracking elements mounted symmetrically about the inner walls and at the aperture end of a scalar horn
US2430568A (en) Antenna system
US4318107A (en) Printed monopulse primary source for airport radar antenna and antenna comprising such a source
GB1227687A (en)
US3305870A (en) Dual mode horn antenna
US2840819A (en) Reflecting surfaces
GB815178A (en) Two-channel radio beam antenna arrangement
US3102265A (en) New aerial system radiating several beams
US2486589A (en) Apple-core reflector antenna
US2929064A (en) Pencil beam slot antenna
GB594416A (en) Improvements in or relating to the transmission and reception of electromagnetic waves
GB876304A (en) Improvements in or relating to aerials with a variable beam direction
GB1220395A (en) An improved broadband antenna
US2594871A (en) Antenna
US2881431A (en) Ring source omnidirectional antenna
GB978509A (en) Improvements in and relating to aerials
GB1359830A (en) Multimode antennas
GB762415A (en) Improvements in or relating to aerials
US3949405A (en) Vertically polarised omnidirectional antenna
US2750588A (en) Wave guide terminating device
GB801885A (en) Improvements in or relating to directional aerials for the transmission or reception of electromagnetic waves
US2653239A (en) Antenna
GB983458A (en) A surface and leaky wave antenna
US2589433A (en) Wave guide feed for cylindrical paraboloid
US3922681A (en) Polarization rotation technique for use with two dimensional TEM mode lenses