Phase Noise Characteristics of Oscillator Circuits Emphasizing Impedance Matching

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  • Imaike Takeshi
    Graduate Course of Electronic Engineering, Graduate School of Science and Technology, Nihon University
  • Sakuta Yukinori
    Department of Electronics and Computer Science, College of Science and Technology, Nihon University
  • Sekine Yoshifumi
    Department of Electronics and Computer Science, College of Science and Technology, Nihon University

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  • インピーダンス整合を重視した発振回路の位相雑音特性
  • インピーダンス セイゴウ オ ジュウシ シタ ハッシン カイロ ノ イソウ ザツオン トクセイ

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Abstract

This paper describes improvement of phase noise characteristics of an Fr oscillator. We have examined the configuration of the Fr oscillator, the loaded Q of which is improved by using matching network, and we have predicted value of the loaded Q. Furthermore, we actually made several configurations of Fr oscillator and measured the SSB phase noise. We show the measured loaded Q of Fr oscillator is corresponding to the calculation results well, and the phase noise characteristics are improved by decreasing characteristic impedance of the frequency selective circuit.

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