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

• 作 者: Ping Wang Jia-Ru Shi Zheng-Feng Xiong Ze-Ning Liu Cheng Cheng Huai-Bi Chen
• 机 构: Department of Engineering Physics, Tsinghua University, Beijing 100084, China“,”Key Laboratory of Pa
• 出 处: 核技术（英文版）
• 发表日期: 2018年4期
• 关键词: Resonant cavity Q factor LRC circuit Coupling coefficient

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.