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Low Phase Noise VCO with X -Band Using Metamaterial Structure of Dual Square Loop  

Shin, Doo-Soub (Department of Information and Telecommunication Engineering, Soongsil University)
Seo, Chul-Hun (Department of Information and Telecommunication Engineering, Soongsil University)
Publication Information
Journal of the Institute of Electronics Engineers of Korea TC / v.47, no.12, 2010 , pp. 84-89 More about this Journal
Abstract
In this paper, a novel voltage-controlled oscillator (VCO) using the microstrip square open loop dual split ring resonator is presented for reducing the phase noise. The square-shaped dual split ring resonator having the form of the microstrip square open loop is investigated to reduce the phase noise. Compared with the microstrip square open loop resonator and the microstrip square open loop split ring resonator as well as the conventional microstrip line resonator, the microstrip square dual split ring resonator has the larger coupling coefficient value, which makes a higher Q value, and has reduced the phase noise of VCO. The VCO with 1.7V power supply has the phase noise of -123.2~-122.0 dBc/Hz @ 100 kHz in the tuning range, 11.74~11.75 GHz. The figure of merit (FOM) of this VCO is-214.8~-221.7 dBc/Hz dBc/Hz @ 100 kHz in the same tuning range. Compared with VCO using the conventional microstrip line resonator, VCO using microstrip square open loop resonator, the phase noise of VCO using the proposed resonator has been improved in 26 dB, 10 dB, respectively.
Keywords
VCO; Phase Noise; Multiple Split Ring Resonator; Microstrip Square Open Loop; Coupling Coefficien;
Citations & Related Records
Times Cited By KSCI : 1  (Citation Analysis)
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