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A compact low-phase noise oscillator with superior harmonic suppression characteristics based on novel nested split-ring resonator (NSRR)

Published online by Cambridge University Press:  28 September 2015

Yong Liu ,
Neng Xie ,
Xiaohong Tang  and
Fei Xiao
Yong Liu*
Affiliation:
School of Electronic Engineering, University of Electronic Science and Technology of China, Chengdu, Sichuan 611731, China
Neng Xie
Affiliation:
School of Electronic Engineering, University of Electronic Science and Technology of China, Chengdu, Sichuan 611731, China
Xiaohong Tang
Affiliation:
School of Electronic Engineering, University of Electronic Science and Technology of China, Chengdu, Sichuan 611731, China
Fei Xiao
Affiliation:
School of Electronic Engineering, University of Electronic Science and Technology of China, Chengdu, Sichuan 611731, China
*
Corresponding author: Y. Liu Email: liuyong2323@163.com
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Abstract

In this paper, a novel microwave oscillator incorporating miniaturized nested split-ring resonators is proposed. The high-quality (Q) factor and wide spurious-free band of the NSRR contribute to low-phase noise and high-harmonic suppression of the proposed oscillator circuits. In addition, the NSRR is featured by compact size of 0.12λg × 0.12λg, where λg is the guided wavelength of resonance frequency. The fabricated 2.4 GHz oscillator has an output power of 11.7 dBm with 5 V DC supply and 10 mA current consumption. The second harmonic suppression is −45.49 dBc, the phase noise is −110 dBc/Hz @100 kHz, and the DC–RF conversion efficiency is measured as 30%.

Keywords

OscillatorNested split-ring resonatorhigh Q-factorLow-phase noiseHarmonic suppression
Type
Research Papers
Information
International Journal of Microwave and Wireless Technologies , Volume 8 , Issue 8 , December 2016 , pp. 1155 - 1161
Copyright
Copyright © Cambridge University Press and the European Microwave Association 2015 

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