A voltage-controlled hair-pin resonator oscillator (VCHRO) with series feed
back properties is designed for K-band operation using a new tuning mechani
sm. The circuit topology has the following advantages over conventional con
figurations: (i) low production cost; (ii) compact design because there is
no need for a doubler or coupler; and (iii) suitability for MMIC hair-pin r
esonator applications.