Doherty transceiver interface

A phased array element, comprising:

• a transmit phase shifter configured to provide a quadrature signal and an in-phase signal;
• a main amplifier path configured to provide a quadrature output signal based on the quadrature signal;
• an auxiliary amplifier path configured to provide an in-phase output signal based on the in-phase signal;
• and
• a reconfigurable output network configured to generate an equivalent 90 degree (quadrature) phase shift between the quadrature output signal and the in-phase output signal to provide a combined transmit signal, wherein a Tx mode comprises a Tx low power (LP) mode and a Tx high power (HP) mode and an impedance presented to a low noise amplifier (LNA) coupled to the reconfigurable output network in the Tx low power mode and in a receive (Rx) mode is influenced only by the main amplifier path.

A phased array element, comprising:

• a transmit phase shifter configured to provide a quadrature signal and an in-phase signal;
• a main amplifier path configured to provide a quadrature output signal based on the quadrature signal;
• an auxiliary amplifier path configured to provide an in-phase output signal based on the in-phase signal;
• a reconfigurable output network configured to generate an equivalent 90 degree (quadrature) phase shift between the quadrature output signal and the in-phase output signal to provide a combined transmit signal;
• and
• a mode control switch circuit having a first switch and a second switch, the mode control switch circuit configured to select between a transmit (Tx) mode and a receive (Rx) mode, to control an impedance presented to a low noise amplifier (LNA) coupled to the reconfigurable output network in the Tx mode.