Patent ID: 7683718

Claim:
An RF power amplifier, comprising: a first field effect transistor: having a first gate, a first source, and a first drain, having an output power rating of at least 200 watts, and operating with a drain-to-source voltage that is greater than 50 VDC; a second field effect transistor: having a second gate, a second source, and a second drain, having an output power rating of at least 200 watts, and operating with a drain-to-source voltage that is greater than 50 VDC; wherein said transistors are configured as a push-pull amplifier; an RF signal input; an input transformer connected to the RF signal input, the input transformer having respective balanced outputs connected to the first gate and the second gate; and a broadband output transformer having a first balanced input connected to the first drain, and a second balanced input connected to the second drain, wherein the broadband output transformer has an input to output impedance ratio of 1:4, and further wherein at least some flux cancellation occurs within the broadband output transformer.