Communications: radio wave antennas – Antennas – Microstrip
Patent
1992-04-10
1995-01-17
Hajec, Donald
Communications: radio wave antennas
Antennas
Microstrip
343846, H01Q 138
Patent
active
053829590
ABSTRACT:
An efficient, lightweight, broadband antenna, having high quality circular polarization capabilities, is disclosed for use in a variety of applications. In one embodiment, signals are fed to, or received by, an array of electromagnetically coupled patch pairs arranged in sequential rotation by an interconnect network which is coplanar with the coupling patches of the patch pairs. The interconnect network includes phase transmission line means, the lengths of which are preselected to provide the desired phase shifting among the coupling patches. The complexity of the array and the space required are thus reduced. In one described embodiment, two such arrays are employed, each having four patch pairs. The two arrays are arranged in sequential rotation to provide normalization of the circularly polarized transmitted or received beam. In another embodiment, a lightweight material having a dielectric constant less than about 1.5 is employed in the lower resonant cavity and, preferably, in the upper resonant cavity as well.
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Lee et al., "Microstrip Subarray with Coplanar and Stacked Parasitic Elements", Electronics Letters, May 10, 1990, vol. 26, No. 10, pp. 668-669.
Olson Steven C.
Pett Todd A.
Sreenivas Ajay I.
Alberding Gilbert E.
Ball Corporation
Hajec Donald
Le Hoang-anh
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