H - Electricity – 01 – Q
Patent
H - Electricity
01
Q
351/31
H01Q 1/38 (2006.01) H01Q 9/04 (2006.01) H01Q 21/06 (2006.01) H01Q 25/00 (2006.01)
Patent
CA 1329257
ABSTRACT OF THE DISCLOSURE A dual-polarization geometry for printed-circuit antennas, in which two layers of radiating elements and corresponding power dividers are provided, one set of power dividers being disposed orthogonally with respect to the other, so as to enable reception of two signals with orthogonal senses of polarization. Either dual linear or dual circular polarization may be achieved through suitable selection of radiating elements. Alternatively, a quadrature hybrid may be coupled, either externally or as an integral part of the antenna, to enable dual circular polariza- tion. Various shapes and types of radiating elements, having patches or slots, may be employed in the various layers. Fur- ther, a gridded radiating element, formed of a grid wherein a metallization region is etched selectively to yield a plurality of metal strips disposed parallel to each other with a predeter- mined separation, may be used. This element, in contrast to known elements which employ solid metallization regions, finds particular application in dual polarization geometries, wherein two signals are received simultaneously, and enables improved performance over a wide bandwidth. The gridded element also is applicable to single-polarization geometries.
599355
Sorbello Robert Michael
Zaghloul Amir Ibrahim
Communications Satellite Corp.
Moffat & Co.
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