2.4GHz-Band 20 W GaN-HFET VCO with Frequency-Tunable High Power Resonator

Abstract

A novel frequency-tunable high power resonator is proposed for use in the feedback-path of the feedback-type high power oscillator to realize a frequency-tunable performance. With the combination of a fixed-frequency high power resonator and a multi-section high breakdown-voltage varactor diode, a 2.385 to 2.456GHz GaN-HFET VCO having an output power of 20W and a drain efficiency of 55% has been successfully achieved for use in the microwave oven.