DYNAMIC TUNING OF A TRANSFORMER-BASED RADIO FREQUENCY POWER AMPLIFIER

摘要

Embodiments of radio frequency (RF) systems include a power amplifier having a primary winding and a secondary winding. The primary winding can be biased in different states in transmit and receive modes such that a difference between center frequencies of the primary winding and the secondary winding are significantly different in the different modes.

主权项

1. A radiofrequency (RF) device, comprising:
a power amplifier having a primary winding and a secondary winding, the power amplifier configured in a transmit mode to amplify an RF transmit signal received on the primary winding and provide an amplified RF transmit signal on the secondary winding; and a controller configured, when the RF device is in a transmit mode, to bias the primary winding in a first state and, when the RF device is in a receive mode, to bias the primary winding in a second state in which a difference between center frequencies of the primary winding and the secondary winding is significantly greater than when the primary winding is biased in the first state.