Adaptive radio frequency front-end circuit with low insertion loss for WLAN

A radio frequency (RF) front-end circuit, comprising:

• a multi-way switch, comprising:
• an input end, coupled to an antenna and configured to receive a radio frequency signal from the antenna;
• a plurality of output ends;
• and
• a control end, configured to couple the input end to one of the output ends according to a switch control signal;
• and
• an output terminal;
• and
• a shunt circuit, coupled between the multi-way switch and the output terminal;
• wherein when the input end of the multi-way switch is coupled to a first output end of the output ends of the multi-way switch, the shunt circuit provides a first shunt path between the first output end and the output terminal with first rejection to the radio frequency signal;
• wherein when the input end of the multi-way switch is coupled to a second output end of the output ends of the multi-way switch, the shunt circuit provides a second shunt path between the second output end and the output terminal with second rejection to the radio frequency signal, and the second rejection is greater than the first rejection;
• and
• wherein when the input end of the multi-way switch is coupled to a third output end of the output ends of the multi-way switch, the shunt circuit provides a third shunt path between the third output end and the output terminal with third rejection to the radio frequency signal, and the third rejection is greater than the second rejection.