Communications: radio wave antennas – Antennas – Microstrip
Patent
1997-06-30
2000-09-19
Wimer, Michael C.
Communications: radio wave antennas
Antennas
Microstrip
H01Q 138
Patent
active
061219290
ABSTRACT:
The present invention relates to an antenna system that is particularly suited for use in communications systems implementing wireless local loops. In its preferred embodiment, the antenna comprises an array of air loaded stacked patch antenna elements suspended above a ground plane. The antennas each operate in a dual slant 45 linearly polarized mode and are fed by air loaded microstrip transmission line feeds. The line widths of the feed lines are uniform throughout the design, thereby eliminating the need for impedance transformers. The electronics for the antenna is located beneath the antenna ground plane to reduce the footprint of the antenna. In addition, a "connectorless" coupling structure is provided for transferring signals between the antenna elements and the underlying electronics. In one embodiment, an antenna is provided having enhanced sidelobe suppression despite having a limited number of side by side elements in a plane of interest.
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Godard Jeffrey Allan
Olson Steven Carter
Ball Aerospace & Technologies Corp.
Wimer Michael C.
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