Communications: radio wave antennas – Antennas – Wave guide type
Patent
1989-09-05
1991-05-21
Wimer, Michael C.
Communications: radio wave antennas
Antennas
Wave guide type
343776, 343786, H01Q 1302, H01Q 1304
Patent
active
050179365
ABSTRACT:
A constant E-plane beamwidth antenna (10), includes a rectangular feeder (12) communicating with a partly cylindrical sectoral horn (14) via a transition (30) positioned in the throat of the sectoral horn. The transition (30) has a plurality of electrically conductive partitions (32) positioned perpendicular to the electric field of a mode propagating, in use, in the sectoral horn (14). The disposition of the electrically conducting partitions is arranged to transport modes which have a constant plane across the surface on one side of the transition into modes which have a constant phase across the surface on the other side of the transition. The transition (30) may be used to control the E-plane beamwidth of an H-plane constant beamwidth horn. Optionally the spaces between the electrically conductive partitions (32) may be filled with a low loss dielectric material.
REFERENCES:
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patent: 4349827 (1982-09-01), Bixler et al.
patent: 4667205 (1987-05-01), Gehin
patent: 4757326 (1988-07-01), Profera
Slobod Jack D.
U.S. Philips Corp.
Wimer Michael C.
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