Novel method to measure unloaded quality factor of resonant cavities at room temperature

Ping Wang; Jia-Ru Shi; Zheng-Feng Xiong; Ze-Ning Liu; Cheng Cheng; Huai-Bi Chen

doi:10.1007/s41365-018-0383-3

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Novel method to measure unloaded quality factor of resonant cavities at room temperature

SYNCHROTRON RADIATION TECHNOLOGY AND APPLICATIONS | Updated：2021-02-07

- Novel method to measure unloaded quality factor of resonant cavities at room temperature
- Nuclear Science and Techniques Vol. 29, Issue 4, Article number: 50(2018)
- Affiliations：
  
  1.Department of Engineering Physics, Tsinghua University, Beijing 100084, China
  2.Key Laboratory of Particle and Radiation Imaging of Ministry of Education, Tsinghua University, Beijing 100084, China
  3.Northwest Institute of Nuclear Technology, Xi’an 710024, China
- Author bio：
  
  Corresponding author, ping-wang13@mails.tsinghua.edu.cn
- Funds：
- DOI：10.1007/s41365-018-0383-3
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Ping Wang, Jia-Ru Shi, Zheng-Feng Xiong, et al. Novel method to measure unloaded quality factor of resonant cavities at room temperature. [J]. Nuclear Science and Techniques 29(4):50(2018)
DOI：

Ping Wang, Jia-Ru Shi, Zheng-Feng Xiong, et al. Novel method to measure unloaded quality factor of resonant cavities at room temperature. [J]. Nuclear Science and Techniques 29(4):50(2018) DOI： 10.1007/s41365-018-0383-3.

摘要

Abstract

We demonstrated a novel method to measure the unloaded quality factor (,Q, factor) of high-Q resonant cavities. This method was used to obtain data with low errors and calculate the unloaded Q factor. This procedure was more reliable than traditional methods. The data required for the method were near the resonant frequency, not at the half-power points of the reflection coefficient curve or Smith chart. We applied the new method to measure a resonant cavity with an unloaded ,Q, factor of ~100,000, obtaining good agreement between the measured and theoretical results.

关键词

Keywords

Resonant cavityQ factorLRC circuitCoupling coefficient

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