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http://dx.doi.org/10.5515/KJKIEES.2014.25.3.269

A Design of a 5 GHz Low Phase Noise Voltage Tuned Dielectric Resonator Oscillator Using Loop Group Delay  

Son, Beom-Ik (Department of Radio Science and Engineering, Chungnam National University)
Jeong, Hae-Chang (Agency for Defense Development)
Yeom, Kyung-Whan (Department of Radio Science and Engineering, Chungnam National University)
Publication Information
The Journal of Korean Institute of Electromagnetic Engineering and Science / v.25, no.3, 2014 , pp. 269-281 More about this Journal
Abstract
In this paper, a systematic design of a low phase noise voltage-tuned dielectric resonator oscillator(VTDRO) using loop group delay is proposed. Designed VTDRO is closed-loop type and consists of a cascade connection of a resonator, phase shifter, and amplifier. Firstly, a reference VTDRO is fabricated and its phase noise and electrical frequency tuning range are measured. Both the phase noise and electrical frequency tuning range depend on the loop group delay. Then, a required value of loop group delay for a new VTDRO with a low phase noise can be systematically computed. In addition, its phase noise and electrical frequency tuning range can be theoretically estimated using those obtained from the measurement of the reference VTDRO. When the loop group delay increases, the phase noise decreases and the electrical frequency tuning range also decreases. The former predominantly depends on the resonator structure. Therefore we propose a systematic design procedure of a resonator with high group delay characteristics. The measured loop group delay of the new VTDRO is about 700 nsec. The measured phase noise of the new VTDRO show a state-of-the-art performance of 154.5 dBc/Hz at 100 kHz frequency offset and electrical frequency tuning range of 448 kHz for a voltage change of 0~10V. The oscillation power is about 4.39 dBm.
Keywords
DRO; Dielectric Resonator; Open-Loop S-Parameter; Phase Noise;
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Times Cited By KSCI : 2  (Citation Analysis)
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