Communications: radio wave antennas – Antennas – Within conductive apertured wall
Patent
1990-10-24
1992-11-17
Wimer, Michael C.
Communications: radio wave antennas
Antennas
Within conductive apertured wall
3437925, H01Q 1110
Patent
active
051647389
ABSTRACT:
A generally planar antenna structure having at least six radial antenna elements, each of which uses log-periodic principles to provide a broad bandwidth of operation. Each antenna element has a radial arm and integral, arcuate teeth extending in opposite directions from the radial arm, such that the spacing, width and length of the teeth increases with increasing radial distance from the center of the structure. The teeth are preferably interleaved with teeth in adjacent antenna elements. A feed region of the structure is provided near its center, to connect the antenna elements through a connection matrix to input/output terminals and provide operation in multiple modes and multiple polarization senses. The antenna structure is capable of operating in high order modes, to provide multifunctional operation and enhanced performance in angle-of-arrival systems, and is capable of transmitting and receiving both right-hand and left-hand circularly polarized signals, and all dual linearly polarized signals, all over a broad frequency band.
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Campbell Donn V.
Walter Carlton H.
Heal Noel F.
Taylor Ronald L.
TRW Inc.
Wimer Michael C.
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