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http://dx.doi.org/10.17661/jkiiect.2016.9.6.539

Design and Implementation of VCO for X-band with Shorted Coupled C type Resonator  

Kim, Jong-hwa (Dept. of Electronics Engineering, Silla University)
Kim, Gi-rae (Dept. of Electronics Engineering, Silla University)
Publication Information
The Journal of Korea Institute of Information, Electronics, and Communication Technology / v.9, no.6, 2016 , pp. 539-545 More about this Journal
Abstract
In this paper, a novel coupled C type resonator is proposed for improvement of phase noise characteristics that is weak point of oscillator using planar type microstrip line resonator. Oscillator using proposed shorted coupled C type resonator is designed, it has improved phase noise characteristics. At the fundamental frequency of 9.8GHz, 4.87dBm output power and -84.7 dBc@100kHz phase noise have been measured for oscillator with shorted coupled C type resonator. Next, we designed voltage controlled oscillator using proposed shorted coupled C type resonator with varactor diode. The VCO has 33.8MHz tuning range from 9.7807GHz to 9.8145GHz, and phase noise characteristic is -115~-112.5dBc/Hz@100KHz. Due to its simple fabrication process and planar type, it is expected that the technique in this paper can be widely used for low phase noise oscillators for both MIC and MMIC applications.
Keywords
MMIC; Oscillator; phase Noise; Resonator; VCO; X-Band;
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