Abstract: A system and method for a wide-band low loss quadrature phase antenna feed system is provided. A 180° phase shifter is configured to generate a 0° and 180° phase output. The phase shifter's outputs are fed into a 90° hybrid coupler to generate 0°, 90°, 180° and 270° outputs for used to feed a quadrature phase antenna.

Abstract: A system and method for a wide-band low loss quadrature phase antenna feed system is provided. A 180° phase shifter is configured to generate a 0° and 180° phase output. The phase shifter's outputs are fed into a 90° hybrid coupler to generate 0°, 90°, 180° and 270° outputs for used to feed a quadrature phase antenna.

Abstract: A transceiver which includes amplifier operating as a power amplifier when amplifying a signal to be transmitted by the transceiver and as a low-noise amplifier when amplifying a signal received by the transceiver, and switching circuitry switchable to a first configuration in which the amplifier operates as a power amplifier, and to a second configuration in which the amplifier operates as a low-noise amplifier. The transceiver can be used in a relay station, or other station, operating in an Orthogonal Frequency Division Multiple Access (OFDMA) network. A method includes determining whether a station operating in an OFDMA network is to transmit a signal or receive a signal and providing the signal to an amplifier in the station so that the amplifier operates as a power amplifier or a low-noise amplifier based on the determination.