Patent ID: 6658269
Filing Date: 2003-12-02
Classification: H01Q,H04B,H04W

Abstract:
A communications system having a base station tower transmitting RF signals to and receiving RF signals from at least one mobile station, comprising:a first receive antenna of a first polarization supported on the base station tower; a second receive antenna of a second polarization diverse to the first polarization supported on the base station tower; a first transmit antenna of a first polarization supported on the base station tower; a second transmit antenna of a second polarization diverse to the first polarization supported on the base station tower; a first RF power amplifier mounted on the base station tower and close coupled to the first transmit antenna, the close coupling of the first RF power amplifier to the first transmit antenna increasing transmission power of the first transmit antenna; a second RF power amplifier mounted on the base station tower and close coupled to the second transmit antenna, the close coupling of the second RF power amplifier to the first transmit antenna increasing transmission power of the second transmit antenna; a first low noise amplifier mounted on the base station tower and close coupled to the first receive antenna, the close coupling of the first low noise amplifier to the first receive antenna increasing receiver sensitivity of the first receive antenna; a second low noise amplifier mounted on the base station tower and close coupled to the first receive antenna, the close coupling of the second low noise amplifier to the second receive antenna increasing receiver sensitivity of the second receive antenna; and an RF delay network mounted on the base station tower and close coupled to the second RF power amplifier to generate a delayed version of a transmit signal to thereby generate first and second polarization signals from the first and second transmit antennas.