Dynamically selecting filtering paths to avoid multi-radio coexistence interference in a communication apparatus

A communication apparatus, comprising:

• a first wireless module, capable of utilizing a first radio frequency to provide a first wireless communication service of a first radio access technology (RAT);
• a second wireless module, capable of utilizing a second radio frequency to provide a second wireless communication service of a second RAT;
• and
• a processor,
• wherein the first wireless module comprises:
• a communication device, providing the first wireless communication service of the first RAT in compliance with a first protocol;
• an antenna module;
• and
• a filter module, coupled between the communication device and the antenna module and comprising:
• a first filter;
• a second filter;
• a first switch, switching in response to a control signal;
• and
• a second switch, switching in response to the control signal,
• wherein the processor issues the control signal to select the first filter or the second filter to electronically connect to the communication device and the antenna module according to the first radio frequency and the second radio frequency, and wherein a first frequency range of a first passband of the first filter overlaps a second frequency range of a second passband of the second filter.