Voltage tuned dielectric resonance 20.5 GHz harmonic oscillator with novel structure

This paper presents a voltage controlled K-band harmonic oscillator composed of two X-band dielectric resonator circuits at the input port and the output port of the oscillator The novel structure supplies not only a voltage tuning circuit but also an output port at fundamental frequency as a function of prescaler on the structure. The output frequency is 20.5 GHz and the maximum power level of the output is +5.5 dBm. The harmonic oscillator exhibits -30 dBc of fundamental frequency rejection.