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Class-E microwave oscillator

Vladimir G. Krizhanovski, V. A. Printsovskii


The class-E oscillator with the directed coupler in the feedback is studied. The similar design allows to retune the oscillator with preservation of high efficiency due to a constancy of a directed coupler coupling coefficient in band of readjustable frequencies and absence of the additional selective resonator in the feedback. Influence of spurious elements of the transistor on generation conditions in class-E is considered. The experimental breadboard of a class-E oscillator with output power 500 mW and efficiency 65% on frequency 800 MHz is investigated.

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