Solid-state high power RF oscillator

A new kind of RF solid-state oscillator design is observed. The oscillator has two feedback loops, which provide a safe working condition for the power transistor at high levels of RF output power. The oscillator uses a high power LDMOS transistor, which provides output power greater than 65 W and efficiency better than 65% at the operating frequency of 915 MHz. The oscillator is designed using microstrip lines and lumped components on Rogers R03010/sup TM/ substrate.