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Antenna Based Signal Processor Using Reconfigurable Receiver

A reconfigurable receiver structure is demonstrated in this paper, where the receiver could be tuned for the optimum reception or rejection of the radio wave with any form of polarization. Such a receiver is enabled by digital or analog processing on the outputs of a dual polarized antenna. A closed form expression of the down-conversion matrix is presented for the received signal processing. Demonstration of this receiver for various polarized waves is also presented using RFIC components. The experimental results demonstrate cross polarization rejection of at least 14 dB for linearly polarized and 18 dB for circularly polarized waves over 500 MHz at 2.45 GHz.