Abstract: An electronic circuit includes an input matching network, a tunable resonator, a fixed output matching network and a transistor. The tunable resonator includes a varactor and an inductor connected in series. The output matching network includes at least one shunt open-stub connected to the output of the inductor in the tunable resonator and at least one transmission line connected to the at least one shunt open-stub. The transistor includes a gate connected to the input matching network, a source connected to ground, and a drain directly connected to an input of the tunable resonator.

Abstract: A tunable amplifier includes continuous tunability for both frequency and power levels. The tunable amplifier includes a combination of a tunable series resonator and a multi-stage LC network as the output matching network. The tunable amplifier incorporates a variable diode varactor with high breakdown voltage and high tuning range into a tunable resonator. The tunable resonator is connected to a fixed output matching network to enable a wide range of operating frequencies. The tunable amplifier enables high power, high efficiency, broadband and load-modulated power amplification, which is greatly desired for next-generation wireless communication systems and other high-frequency applications.

Abstract: A tunable amplifier includes continuous tunability for both frequency and power levels. The tunable amplifier includes a combination of a tunable series resonator and a multi-stage LC network as the output matching network. The tunable amplifier incorporates a variable diode varactor with high breakdown voltage and high tuning range into a tunable resonator. The tunable resonator is connected to a fixed output matching network to enable a wide range of operating frequencies. The tunable amplifier enables high power, high efficiency, broadband and load-modulated power amplification, which is greatly desired for next-generation wireless communication systems and other high-frequency applications.