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X-band Low Phase Noise VCO Using Dual Coupled Spiral Resonator  

Kim, Yang-Hyun (Department of Information and Telecommunication Engineering, Soongsil University)
Seo, Chul-Hun (Department of Information and Telecommunication Engineering, Soongsil University)
Ha, Sung-Jae (Samsungthales)
Lee, Bok-Hyung (Samsungthales)
Publication Information
Journal of the Institute of Electronics Engineers of Korea TC / v.46, no.11, 2009 , pp. 56-60 More about this Journal
Abstract
In this paper, a novel voltage controlled oscillator (VCO) has been presented by using the microstrip square multiple spiral resonator for reducing the phase noise of VCO. The microstrip multiple square resonator has the large coupling coefficient value, which makes a high Q value, and has reduced phase noise of VCO. The VCO with 1.8 V power supply has phase noise of -115.0~-117.34 dBc/Hz @100 kHz in the tuning range, 8.935~9.4 GHz. When it has been compared with microstrip square multiple spiral resonator and coventional spiral resonator, the reduced Q value has been -32.7 dB and -57.6 dB respectively. This low phase noise VCO could ve available to a VCO in X-band.
Keywords
Spiral VCO; metamaterials; microstrip square multiple spiral resonator; coupling coefficient;
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