中文摘要：

介绍一种采用新颖hair—pin谐振器设计低相位噪声平面微波振荡器的方法。新hair-pin谐振器利用阶梯阻抗可以转移基波倍频处的伪谐振频率并可以消除谐波互调分量的优势，使振荡器的相位噪声明显地降低。与传统均匀阻抗hair-pin谐振器设计的振荡器相比，新hair-pin谐振器设计的振荡器表现出更好的相位噪声。实验测量结果表明：振荡频率为12．07GHz，在100kHz和1MHz频偏处，相位噪声分别为-96．15dBc／Hz和-127．29dBc／Hz。此外，振荡器的功耗为37．4mw，输出功率为-0．76dBm。

英文摘要：

In this paper a low phase-noise planar microwave oscillator employing a novel hair- pin resonator is presented. The oscillator phase noise is remarkably reduced by taking advantage of the stepped impedance resonator （SIR） which could make spurious resonance frequencies con- sequently be shifted from the integer multiples of its fundamental frequency and eliminate the in- termodulation components. The new hair-pin resonator, which is used for the oscillator, displays better phase noise compared with the conventional hair-pin oscillator designed by uniform imped- ance resonator （UIR）. The experiment results show that the oscillation frequency is 12.07 GHz ,and phase noises are --96.15 dBc/Hz and --127.29 dBc/Hz at 100 kHz and 1 MHz offset frequencies, respectively . Moreover, the oscillator exhibits a low power consumption with 37.4 mW and the output power is --0.76 dBm.