A communication system comprising: a phase adjustment circuit configured to receive a first signal and generate a second signal by adjusting a phase of the first signal to compensate for a phase error subsequently introduced by a gallium nitride (GaN) transistor, the phase adjustment circuit including a coupler having a first port to receive the first signal, a second port to provide the second signal, a third port, and a fourth port, a first variable capacitance diode coupled between the third port and a reference potential, a second variable capacitance diode coupled between the fourth port and the reference potential, and an RC filter coupled to a cathode of the first variable capacitance diode and a cathode of the second variable capacitance diode; an amplification circuit including the GaN transistor, a second transistor coupled in series with the GaN transistor, and a GaN sequencer coupled to the GaN transistor and the second transistor and configured to sequence the GaN transistor by applying a bias voltage to the GaN transistor before turning on the second transistor, the amplification circuit being configured to receive the second signal, amplify the second signal to generate a third signal by applying the second signal to the GaN transistor, and provide the third signal to an antenna for wireless transmission; an envelope detector configured to receive the third signal and detect an envelope of the third signal; and a controller configured to receive the envelope of the third signal from the envelope detector and provide a control signal to the phase adjustment circuit based on the envelope of the third signal. Currently amended

Canceled

5-6. Canceled

Canceled

A method of wirelessly transmitting a signal comprising: receiving an input signal; adjusting a phase of the input signal by a phase adjustment amount using a phase adjustment circuit to generate a phase adjusted signal and compensate for a phase error subsequently introduced by a gallium nitride (GaN) transistor, the phase adjustment circuit including a coupler having a first port to receive the input signal, a second port to provide the phase adjusted signal, a third port, and a fourth port, a first variable capacitance diode coupled between the third port and a reference potential, a second variable capacitance diode coupled between the fourth port and the reference potential, and an RC filter coupled to a cathode of the first variable capacitance diode and a cathode of the second variable capacitance diode; sequencing the GAN transistor including applying a bias voltage to the GaN transistor before turning on a second transistor coupled in series with the GaN transistor; amplifying the phase adjusted signal to generate an amplified signal including applying the phase adjusted input signal to the GaN transistor; detecting an envelope of the amplified signal; tuning the phase adjustment amount based on the envelope of the amplified signal; and wirelessly transmitting the amplified signal. Currently amended

A communication system comprising: a phase adjustment circuit configured to receive a first signal and generate a second signal by adjusting a phase of the first signal to compensate for a phase error subsequently introduced by a gallium nitride (GaN) transistor, the phase adjustment circuit including a coupler having a first port to receive the first signal, a second port to provide the second signal, a third port, and a fourth port, a first variable capacitance diode coupled between the third port and a reference potential, a second variable capacitance diode coupled between the fourth port and the reference potential, and an RC filter coupled to a cathode of the first variable capacitance diode and a cathode of the second variable capacitance diode; an amplification circuit including the GaN transistor and being configured to receive the second signal, amplify the second signal to generate a third signal by applying the second signal to the GaN transistor, and provide the third signal to an antenna for wireless transmission; an envelope detector configured to receive the third signal and detect an envelope of the third signal; and a controller configured to receive the envelope of the third signal from the envelope detector and provide a control signal to the phase adjustment circuit based on the envelope of the third signal. Previously presented

A communication system comprising: a phase adjustment circuit configured to receive a first signal and generate a second signal by adjusting a phase of the first signal to compensate for a phase error subsequently introduced by a gallium nitride (GaN) transistor, the phase adjustment circuit including a coupler having a first port to receive the first signal, a second port to provide the second signal, a third port, and a fourth port, a first variable capacitance diode coupled between the third port and a reference potential, a second variable capacitance diode coupled between the fourth port and the reference potential, and an RC filter coupled to a cathode of the first variable capacitance diode and a cathode of the second variable capacitance diode; an amplification circuit including the GaN transistor, a second transistor coupled in series with the GaN transistor, and a GaN sequencer coupled to the GaN transistor and the second transistor and configured to sequence the GaN transistor by applying a bias voltage to the GaN transistor before turning on the second transistor, the amplification circuit being configured to receive the second signal, amplify the second signal to generate a third signal by applying the second signal to the GaN transistor, and provide the third signal to an antenna for wireless transmission; an envelope detector configured to receive the third signal and detect an envelope of the third signal; and a controller configured to receive the envelope of the third signal from the envelope detector and provide a control signal to the phase adjustment circuit based on the envelope of the third signal. Currently amended

Canceled

5-6. Canceled

Canceled

A method of wirelessly transmitting a signal comprising: receiving an input signal; adjusting a phase of the input signal by a phase adjustment amount using a phase adjustment circuit to generate a phase adjusted signal and compensate for a phase error subsequently introduced by a gallium nitride (GaN) transistor, the phase adjustment circuit including a coupler having a first port to receive the input signal, a second port to provide the phase adjusted signal, a third port, and a fourth port, a first variable capacitance diode coupled between the third port and a reference potential, a second variable capacitance diode coupled between the fourth port and the reference potential, and an RC filter coupled to a cathode of the first variable capacitance diode and a cathode of the second variable capacitance diode; sequencing the GAN transistor including applying a bias voltage to the GaN transistor before turning on a second transistor coupled in series with the GaN transistor; amplifying the phase adjusted signal to generate an amplified signal including applying the phase adjusted input signal to the GaN transistor; detecting an envelope of the amplified signal; tuning the phase adjustment amount based on the envelope of the amplified signal; and wirelessly transmitting the amplified signal. Currently amended

A communication system comprising: a phase adjustment circuit configured to receive a first signal and generate a second signal by adjusting a phase of the first signal to compensate for a phase error subsequently introduced by a gallium nitride (GaN) transistor, the phase adjustment circuit including a coupler having a first port to receive the first signal, a second port to provide the second signal, a third port, and a fourth port, a first variable capacitance diode coupled between the third port and a reference potential, a second variable capacitance diode coupled between the fourth port and the reference potential, and an RC filter coupled to a cathode of the first variable capacitance diode and a cathode of the second variable capacitance diode; an amplification circuit including the GaN transistor and being configured to receive the second signal, amplify the second signal to generate a third signal by applying the second signal to the GaN transistor, and provide the third signal to an antenna for wireless transmission; an envelope detector configured to receive the third signal and detect an envelope of the third signal; and a controller configured to receive the envelope of the third signal from the envelope detector and provide a control signal to the phase adjustment circuit based on the envelope of the third signal. Previously presented

A communication system comprising: a phase adjustment circuit configured to receive a first signal and generate a second signal by adjusting a phase of the first signal to compensate for a phase error subsequently introduced by a gallium nitride (GaN) transistor, the phase adjustment circuit including a coupler having a first port to receive the first signal, a second port to provide the second signal, a third port, and a fourth port, a first variable capacitance diode coupled between the third port and a reference potential, a second variable capacitance diode coupled between the fourth port and the reference potential, and an RC filter coupled to a cathode of the first variable capacitance diode and a cathode of the second variable capacitance diode; an amplification circuit including the GaN transistor, a second transistor coupled in series with the GaN transistor, and a GaN sequencer coupled to the GaN transistor and the second transistor and configured to sequence the GaN transistor by applying a bias voltage to the GaN transistor before turning on the second transistor, the amplification circuit being configured to receive the second signal, amplify the second signal to generate a third signal by applying the second signal to the GaN transistor, and provide the third signal to an antenna for wireless transmission; an envelope detector configured to receive the third signal and detect an envelope of the third signal; and a controller configured to receive the envelope of the third signal from the envelope detector and provide a control signal to the phase adjustment circuit based on the envelope of the third signal. Currently amended

Canceled

5-6. Canceled

Canceled

A method of wirelessly transmitting a signal comprising: receiving an input signal; adjusting a phase of the input signal by a phase adjustment amount using a phase adjustment circuit to generate a phase adjusted signal and compensate for a phase error subsequently introduced by a gallium nitride (GaN) transistor, the phase adjustment circuit including a coupler having a first port to receive the input signal, a second port to provide the phase adjusted signal, a third port, and a fourth port, a first variable capacitance diode coupled between the third port and a reference potential, a second variable capacitance diode coupled between the fourth port and the reference potential, and an RC filter coupled to a cathode of the first variable capacitance diode and a cathode of the second variable capacitance diode; sequencing the GAN transistor including applying a bias voltage to the GaN transistor before turning on a second transistor coupled in series with the GaN transistor; amplifying the phase adjusted signal to generate an amplified signal including applying the phase adjusted input signal to the GaN transistor; detecting an envelope of the amplified signal; tuning the phase adjustment amount based on the envelope of the amplified signal; and wirelessly transmitting the amplified signal. Currently amended

A communication system comprising: a phase adjustment circuit configured to receive a first signal and generate a second signal by adjusting a phase of the first signal to compensate for a phase error subsequently introduced by a gallium nitride (GaN) transistor, the phase adjustment circuit including a coupler having a first port to receive the first signal, a second port to provide the second signal, a third port, and a fourth port, a first variable capacitance diode coupled between the third port and a reference potential, a second variable capacitance diode coupled between the fourth port and the reference potential, and an RC filter coupled to a cathode of the first variable capacitance diode and a cathode of the second variable capacitance diode; an amplification circuit including the GaN transistor and being configured to receive the second signal, amplify the second signal to generate a third signal by applying the second signal to the GaN transistor, and provide the third signal to an antenna for wireless transmission; an envelope detector configured to receive the third signal and detect an envelope of the third signal; and a controller configured to receive the envelope of the third signal from the envelope detector and provide a control signal to the phase adjustment circuit based on the envelope of the third signal. Previously presented

A communication system comprising: a phase adjustment circuit configured to receive a first signal and generate a second signal by adjusting a phase of the first signal to compensate for a phase error subsequently introduced by a gallium nitride (GaN) transistor, the phase adjustment circuit including a coupler having a first port to receive the first signal, a second port to provide the second signal, a third port, and a fourth port, a first variable capacitance diode coupled between the third port and a reference potential, a second variable capacitance diode coupled between the fourth port and the reference potential, and an RC filter coupled to a cathode of the first variable capacitance diode and a cathode of the second variable capacitance diode; an amplification circuit including the GaN transistor, a second transistor coupled in series with the GaN transistor, and a GaN sequencer coupled to the GaN transistor and the second transistor and configured to sequence the GaN transistor by applying a bias voltage to the GaN transistor before turning on the second transistor, the amplification circuit being configured to receive the second signal, amplify the second signal to generate a third signal by applying the second signal to the GaN transistor, and provide the third signal to an antenna for wireless transmission; an envelope detector configured to receive the third signal and detect an envelope of the third signal; and a controller configured to receive the envelope of the third signal from the envelope detector and provide a control signal to the phase adjustment circuit based on the envelope of the third signal. Currently amended

Canceled

5-6. Canceled

Canceled

A method of wirelessly transmitting a signal comprising: receiving an input signal; adjusting a phase of the input signal by a phase adjustment amount using a phase adjustment circuit to generate a phase adjusted signal and compensate for a phase error subsequently introduced by a gallium nitride (GaN) transistor, the phase adjustment circuit including a coupler having a first port to receive the input signal, a second port to provide the phase adjusted signal, a third port, and a fourth port, a first variable capacitance diode coupled between the third port and a reference potential, a second variable capacitance diode coupled between the fourth port and the reference potential, and an RC filter coupled to a cathode of the first variable capacitance diode and a cathode of the second variable capacitance diode; sequencing the GAN transistor including applying a bias voltage to the GaN transistor before turning on a second transistor coupled in series with the GaN transistor; amplifying the phase adjusted signal to generate an amplified signal including applying the phase adjusted input signal to the GaN transistor; detecting an envelope of the amplified signal; tuning the phase adjustment amount based on the envelope of the amplified signal; and wirelessly transmitting the amplified signal. Currently amended

A communication system comprising: a phase adjustment circuit configured to receive a first signal and generate a second signal by adjusting a phase of the first signal to compensate for a phase error subsequently introduced by a gallium nitride (GaN) transistor, the phase adjustment circuit including a coupler having a first port to receive the first signal, a second port to provide the second signal, a third port, and a fourth port, a first variable capacitance diode coupled between the third port and a reference potential, a second variable capacitance diode coupled between the fourth port and the reference potential, and an RC filter coupled to a cathode of the first variable capacitance diode and a cathode of the second variable capacitance diode; an amplification circuit including the GaN transistor and being configured to receive the second signal, amplify the second signal to generate a third signal by applying the second signal to the GaN transistor, and provide the third signal to an antenna for wireless transmission; an envelope detector configured to receive the third signal and detect an envelope of the third signal; and a controller configured to receive the envelope of the third signal from the envelope detector and provide a control signal to the phase adjustment circuit based on the envelope of the third signal. Previously presented