Apparatus for reconfigurable directional couplers in an RF transceiver with controllable capacitive coupling

A wireless device comprising:

• a transceiver configured to produce a power input signal;
• a power amplifier configured to receive and amplify the power input signal to provide an amplified power input signal;
• a reconfigurable directional coupler having a power output port, a coupled port, an isolation port, and a power input port connected to the power amplifier, the reconfigurable directional coupler including a first adjustable phase shifter electrically connected between the power input port and the power output port, a second adjustable phase shifter electrically connected between the coupled port and the isolation port, a first configurable coupling capacitor array electrically connected between the power input port and the coupled port, and a second configurable coupling capacitor array electrically connected between the power output port and the isolation port, the reconfigurable directional coupler being configured to receive the amplified power input signal and capacitively couple signal power from the amplified power input signal to the coupled port to provide a coupled signal at the coupled port;
• a sensor connected to the coupled port, the power amplifier, and the transceiver and configured to receive the coupled signal;
• and
• a processor connected to the sensor, the power amplifier, the transceiver, and the reconfigurable directional coupler, the processor being configured to adjust capacitance values of the first and second adjustable capacitor arrays to provide a desired mutual coupling factor between the power input port and the coupled port.