Electromagnetic coupler arrangements for multi-frequency power detection, and devices including same

A wireless device comprising:

• first and second antennas;
• a transceiver configured to produce a plurality of input signals each having a unique frequency;
• a power amplifier module configured to receive and amplify the plurality of input signals from the transceiver to produce a plurality of amplified input signals;
• an antenna switch module including a plurality of antenna swap switches, each respective antenna swap switch having first and second antenna contacts coupled to the first and second antennas, respectively, and first and second input ports;
• a plurality of electromagnetic couplers connected between the power amplifier module and the antenna switch module, the plurality of electromagnetic coupler corresponding in number to each of the first and second input ports of the plurality of antenna swap switches, each respective electromagnetic coupler of the plurality of electromagnetic couplers having an input port configured to receive a respective amplified input signal of the plurality of amplified input signals from the power amplifier module, a coupled port, an output port connected to one of the first and second input ports of a respective one of the plurality of swap switches, and an isolation port, each electromagnetic coupler being configured to provide a coupled signal at the coupled port a coupled signal responsive to receiving the respective amplified input signal at the input port;
• a termination network including a plurality of termination loads;
• and
• an output switch network configured to selectively connect the coupled ports of each of the plurality of electromagnetic couplers to a coupler output bank to provide the coupled signals at the coupler output bank, and to selectively connect the isolation ports of each of the plurality of electromagnetic couplers to one of the plurality of termination loads.