A K-BAND PUSH-PUSH OSCILLATOR EMPLOYING DIFFERENTIAL TRANSMISSION LINE LOADED WITH SIW CAVITY OPERATED IN TM110 MODE

作者：Li, Zhipeng^*; Liu, Yongzhi; Bao, Jingfu

来源：Microwave and Optical Technology Letters, 2016, 58(5): 1217-1221.

DOI：10.1002/mop.29774

• oscillator
• push-push
• substrate integrated waveguide
• differential transmission line

In this letter, a novel differential transmission-line (TL) loaded with circular substrate integrated waveguide (SIW) cavity is presented for realizing K-band push-push oscillator. The SIW cavity is working at TM110 mode to enforce the 180 degrees phase difference between two sub-oscillators, and the tuning metal vias perturbation is introduced in the SIW resonator to maximize the distance between desired odd TM110 mode and adjacent even modes to stabilize the oscillation mode. Unlike the conventional SIW resonator structure, this differential TL possesses a reflective-type property at the resonance frequency. A 19.76 GHz push-push oscillator based on this differential TL is designed and implemented. The measured suppression of fundamental frequency component is -25.62 dBc, and the phase noise is -118.1 dBc Hz(-1) at 1 MHz offset frequency, which corresponds to a figure-of-merit (FOM) of 2191 dBc Hz 21.

• 出版日期2016-5
• 单位电子科技大学