Tunable system and method for tuning a system

摘要

There is provided a system that includes a tunable amplification module, a coupler, an interface module; a detector that is arranged to output an impedance indicative signal and a power indicative signal; wherein the impedance indicative signal is indicative of an impedance mismatch between an output impedance of the tunable amplification module and an impedance of a radio frequency (RF) antenna as seen by the tunable amplification module, wherein the power indicative signal is indicative of an output power of the tunable amplification module.

主权项

1. A system, comprising:
a tunable amplification module that is arranged to amplify an input signal for providing an incident signal; wherein the tunable amplification module has an output port for outputting the incident signal, an input port for receiving the input signal and a control input for receiving an amplification module tuning signal for tuning the amplification factor of the tunable amplification module; a coupler that is arranged to output a first signal that represents the incident signal and a second signal that represents a reflected signal; an interface module; a detector that is arranged to receive the first and second signals and to output an impedance indicative signal and a power indicative signal; wherein the impedance indicative signal is indicative of an impedance mismatch between an output impedance of the tunable amplification module and an impedance of a radio frequency (RF) antenna as seen by the tunable amplification module, wherein the power indicative signal is indicative of an output power of the tunable amplification module; wherein the interface module is arranged to receive an interface module tuning signal and to set an impedance of the interface module in response to the interface module tuning signal; and a control module that is arranged to generate the amplification module tuning signal and the interface module tuning signal in response to the impedance indicative signal and the power indicative signal; wherein control module is arranged to set the amplification module tuning signal to maintain a substantially constant output power level of the tunable amplification module regardless of changes in an impedance of the RF antenna; and wherein the control module is arranged to set the interface module tuning signal to compensate for the impedance mismatch.