GB876304A - Improvements in or relating to aerials with a variable beam direction - Google Patents
Improvements in or relating to aerials with a variable beam directionInfo
- 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
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
Landscapes
- Aerials With Secondary Devices (AREA)
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.
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)
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)
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 |
-
0
- NL NL283921D patent/NL283921A/xx unknown
-
1960
- 1960-02-09 DE DEN17860A patent/DE1107298B/en active Pending
- 1960-02-10 GB GB469060A patent/GB876304A/en not_active Expired
- 1960-02-13 FR FR818426A patent/FR1248325A/en not_active Expired
Cited By (2)
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 |
---|---|
NL283921A (en) | |
DE1107298B (en) | 1961-05-25 |
FR1248325A (en) | 1960-12-09 |
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