Radio transceiver and RF signal processing device

A communications apparatus, capable of supporting multi-band RF signal processing, comprising:

• at least one primary antenna, coupled to a plurality of primary signal receive paths and receiving a plurality of primary signals;
• at least one diversity antenna, coupled to a plurality of diversity signal receive paths and receiving a plurality of diversity signals;
• a front end signal-processing circuitry, comprising a plurality of signal-processing circuits on the primary signal receive paths and the diversity signal receive paths;
• and
• a radio transceiver, comprising:
• a primary signal-processing circuit, designed for processing the primary signals;
• a diversity signal-processing circuit, designed for processing the diversity signals;
• one or more primary receive ports, coupled to the primary signal-processing circuit;
• one or more diversity receive ports, coupled to the diversity signal-processing circuit,
• a first switch, coupled between at least one diversity receive port and the diversity signal-processing circuit;
• and
• a tunnel device, coupled between the first switch and the primary signal-processing circuit,
• wherein the at least one diversity receive port coupled to the first switch is further coupled to the primary signal-processing circuit via the tunnel device, and
• wherein when the at least one diversity receive port receives the primary signal, the primary signal is transferred to the primary signal-processing circuit via the tunnel device under the control of the first switch.