A low phase noise microwave oscillator based on a high Q SIW cavity CSRR band-pass filter

Mehdi Hamidkhani and Farzad Mohajeri

Journal of Electromagnetic Waves and Applications, 2016, vol. 30, issue 16, 2077-2087

Abstract: This study designed, developed and put empirically into test a low phase noise oscillator using a complementary split ring resonator filter of high Q factor as a frequency stabilization and selection element. This oscillator is of parallel feedback type. The oscillator was designed at the group-delay-peak frequency of the filter to achieve a dramatic reduction in the phase noise of the oscillator. At the oscillation frequency 5.36 GHz, the phase noise was measured −128 dBcHz$ \frac{\text{dBc}}{\text{Hz}} $ at 100 kHz offset frequency and −145 dBcHz$ \frac{\text{dBc}}{\text{Hz}} $ at 1 MHz offset frequency. The designed oscillator revealed the output power 7 dBm. According to the scientific literature, the proposed oscillator was found to enjoy the best performance at low phase noise for planar microwave oscillators.

Date: 2016
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DOI: 10.1080/09205071.2016.1231088

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