Journal of electromagnetic engineering and science

The Korean Institute of Electromagnetic Engineering and Science (한국전자파학회)
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An Oscillator Incorporating a Planar Helical Resonator for Phase Noise Reduction and Harmonic Suppression

  • Hwang Cheol-Gyu (Department of Electrical Engineering and Computer Science, KAIST) ;
  • Myung Noh-Hoon (Department of Electrical Engineering and Computer Science, KAIST)
  • Published : 2006.09.01
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Abstract

This paper describes a compact printed helical resonator and its application to a microwave oscillator circuit implemented in coplanar waveguide(CPW) technology. The high Q-factor and spurious-free characteristic of the resonator contribute to the phase noise reduction and the harmonic suppression of the resulting oscillator circuit, respectively. The designed resonator resonating at the frequency of 5.5 GHz showed a loaded Q of 180 in a chip area of only 40 % of the corresponding miniaturized hairpin resonator without any spurious resonances. The fully planar oscillator incorporated with this resonator showed additional phase noise reduction of 10.5 dB at 1 MHz offset and a second harmonic suppression enhancement of 6 dB when compared to those of a conventional CPW oscillator without the planar helical resonator(PHR) structure.

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References

  1. R. W. Rhea, Oscillator Design and Computer Simulation, Prentice Hall, Englewood Cliff, 1990
  2. C. Ernst, V. Postoyalko, and N. Khan, 'Relationship between group delay and stored energy in microwave filters', IEEE Trans. on MTT, vol. 49, no. 1, Jan. 2001
  3. Y. T. Lee, J. S. Lim, C. S. Kim, D. Ahn, and S. Nam, 'A compact-size microstrip spiral resonator and its application to microwave oscillator', IEEE Microwave and Wireless Components Letters, vol. 12, pp. 375-377, 2002 https://doi.org/10.1109/LMWC.2002.804556
  4. J. Lee, Y. T. Lee, and S. Nam, 'A phase noise reduction technique in microwave oscillator using high-Q active filter', IEEE Microwave and Wireless Components Letters, vol. 12, pp. 426-428, 2002 https://doi.org/10.1109/LMWC.2002.805541
  5. C. Broomfield, J. Everard, 'High Q printed helical resonators and filters', IEEE International Frequency Control symposium and PDA Exhibition, pp. 819-822, 2003
  6. G. Gonzalez, Microwave Transistor Amplifiers: Analysis and Design, Prentice Hall, 1997