Patent ID: 8897407

Claim:
An interference avoidance low noise amplifier (LNA) for a radio frequency (RF) antenna and receiver system, which LNA includes: multiple bandpass filters selectively connectable to an RF antenna element and to an output connected to an RF receiver, each filter corresponding to a respective RF bandwidth; a sniffer antenna adapted to detect RF interference signals in a respective RF band; a logic circuit connected to the sniffer antenna and adapted to select a respective bandwidth based on an interference signal detected by said sniffer antenna; an automatic switch activated by said logic circuit and adapted to connect said antenna element and said antenna output to a respective bandpass filter; a receiver selecting the bandwidth selected by the logic circuit for switching out based on a change in direct current (DC) bias; a solution processor for detecting an interfering signal and switching out a respective frequency bandwidth in response to said detected interfering signal; said solution processor includes a logic circuit adapted to select the switched-out bandwidth based on interference power; said logic circuit utilizes multiple bandpass filters for detecting an interfering signal and providing a corresponding signal to said logic circuit for activating a respective filter connected to said antenna element; and said solution processor including a signal processing function connected to an RF receiver and adapted for selecting a bandwidth in use and blocking a bandwidth not in use by the receiver.