Microstrip Antenna with Polarization Diversity.
DEPARTMENT OF THE ARMY WASHINGTON DC
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This invention comprises an inexpensive, flush-mounted microstrip antenna the polarization of which is easily changed from vertical linear to horizontal linear, left-circular, right-circular or any desired elliptical sense. This enables the designer to select the polarization by selecting the proper location of shorting posts in the antenna. The use of rf switching diodes in place of conventional shorting posts provides a means of electronically switching the polarization. Author
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