Push-push subharmonically injection-locked oscillator

A push-push injection-locked dielectric resonator oscillator has been designed for subharmonically injection-locked local oscillators in phased-array antennas at the K-band and above. This circuit topology has the following advantages: (i) a large subharmonic injection locking range using a dielectric resonator with a high quality factor; (ii) a larger frequency multiplication factor, while a microwave device, such as a MESFET, is operating in a low oscillation frequency and having an effective noise temperature (Teff) resulting in a reduction in frequency drift over the operating temperature and the intrinsic FM noise of the free-running oscillator; (iii) a higher yield rate in MMIC applications.