K-band subharmonic injection-locked push-push oscillator using double-sided MIC

Abstract

SUMMARYWith a view to improving the phase noise and frequency variation of a microwave oscillator, a subharmonic injection-locked push-push oscillator using double-sided circuit technology is proposed. The proposed oscillator is realized by placing a microstrip line on the surface of a dielectric substrate and a slot line on the back side. This paper discusses the in-phase input of a subharmonic injection-locking signal with a simple circuit configuration. A 20-GHz subharmonic injection-locked push-push oscillator is designed by this configuration method and fabricated. When 5 GHz is used for the subharmonic injection signal, the locking range is found to be 240 MHz at an injection power of +14.5 dBm. The phase noise is -114.1 dBc/Hz at 1-MHz offset.

X‐band low phase noise in‐phase and out‐of‐phase injection‐locked push–push DRO

“…As injection locking method is simple, phase coherent, and can significantly improve the frequency stability of the oscillator, it can be used to achieve these requirements. Injection-locked planar-type push-push oscillator has been investigated and achieved wide injection locking bandwidth [6,7]. However, injection-locked push-push dielectric resonator oscillator (DRO) is seldom reported.…”