A Ku-band Oscillator using a BGA Gap Waveguide Resonant Cavity

A Ku-band oscillator based on the Gap Waveguide (GWG) resonant cavity using a ball grid array (BGA) flip-chip technique is designed. Compared with typical resonators such as dielectric resonators (DR) and Substrate Integrated Waveguide (SIW) resonators, the BGA-GWG resonant cavity has lower loss and higher Q. These two characteristics make it an ideal choice for oscillator design. Simulation results show the phase noise of BGA-GWG cavity oscillator achieves -105.6 dBc/Hz at an offset of 100 kHz when the BGA-GWG cavity oscillator’s output frequency is 14 GHz.