A high performance Ka-band push-push oscillator design using finite ground cpw structure

A Ka-band push-push oscillator and a Ku- band fundamental oscillator designed using GaAs pHEMT 0.15 mum technology are reported in this paper. The use of finite ground CPW structure that enhanced Q value of the passive element and improved the phase noise with the value of -113.2 dBc/Hz at 1 MHz offset of the push-push oscillator. The push-push oscillator achieves an oscillating frequency of 30.3 GHz while exhibiting a maximum output power of -1.5 dBm with the DC power consumption of 29 mW, together with a figure-of-merit (FOM) of -188.2 dBc/Hz at 1 MHz offset.