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http://dx.doi.org/10.5515/KJKIEES.2007.18.8.847

Low Phase Noise Push-Push VCO Using Microstrip Square Open Loop Resonator and Tunable Negative Resistance  

Choi, Jae-Won (School of Information and Telecommunication Engineering, Soongsil University)
Seo, Chul-Hun (School of Information and Telecommunication Engineering, Soongsil University)
Publication Information
Abstract
In this paper, a novel push-push voltage-controlled oscillator(VCO) using microstrip square open loop resonator and tunable negative resistance is presented. The microstrip square open loop resonator has the large coupling coefficient value, which makes a high Q value, and has reduced phase noise of VCO. The VCO with 1.8V power supply has phase noise of $-124.67{\sim}-122.67dBc/Hz\;@\;100 kHz$ in the tuning range, $5.744{\sim}5.859 GHz$. The FOM of this VCO is $-202.83{\sim}-201dBc/Hz\;@\;100 kHz$ in the same tuning range. When it has been compared with single-ended VCO using microstrip square open loop resonator, and push-push oscillator using microstrip line resonator, the reduced phase noise has been -8.51dB, and -33.67dB, respectively.
Keywords
Low Phase Noise Push-Push VCO Using Microstrip Square Open Loop Resonator and Tunable Negative Resistance;
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Times Cited By KSCI : 1  (Citation Analysis)
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