RF Transmitter Phase Shifting for Pushing and Pulling Control

The patent applies preliminary anti-action by introducing a phase shifter that pre-compensates for the frequency shift caused by pushing and pulling effects. The phase shifter is configured to introduce a phase shift that is equal and opposite to the expected frequency deviation, thereby counteracting the harmful effect before it degrades the oscillator frequency accuracy. This allows the system to maintain high PA power while preserving frequency precision.

The patent implements preliminary action by proactively compensating for frequency shifts using a phase shifter that is controlled based on predicted or measured pushing and pulling effects. Instead of waiting for the PLL to detect and correct frequency deviations, the system preemptively adjusts the phase to prevent frequency drift, thereby improving reliability without increasing PLL complexity or response requirements.

The patent converts the harmful pulling effect into a beneficial control mechanism by using the phase shifter to deliberately introduce controlled phase shifts. The system exploits the existing magnetic coupling and pushing-pulling effects rather than trying to eliminate them, using the phase shifter to transform these effects into a controllable parameter that can be adjusted to maintain frequency stability while preserving efficient power transfer.