Patent ID: 6871054
Filing Date: 2005-03-22
Classification: H04B

Abstract:
1. A diversity receiving apparatus for coupling signals from at least one antenna of at least first and second antennas to a radio receiver, said diversity receiving apparatus comprised of: a) a first variable, RF signal level attenuator having an input coupled to receive RF signals from said first antenna and having an output coupled to a RF signal summing node; b) a second variable, RF signal level attenuator having an input coupled to receive RF signals from said second antenna and having an output coupled to said RF signal summing node; c) a first resistive-capacitive network coupled to said first RF signal level attenuator to supply a variable voltage to said first variable RF signal level attenuator; d) a second resistive-capacitive network coupled to said second RF signal level attenuator to supply a variable voltage to said second variable RF signal level attenuator; e) at least one variable RF signal level attenuator controller, coupled to at least said first resistive-capacitive network so as to control attenuation levels of at least one of said RF signal level attenuators; whereby RF signals received at said first and second antennas and coupled to said RF summing node can be selectively coupled to said radio receiver by controlling at least said first variable RF signal level attenuator and said first resistive-capacitive network.