Microwave Q Measurement in the Presence of Phase Shift of Feed Line

WU Chang-ying; WEI Gao; XU Jia-dong

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Microwave Q Measurement in the Presence of Phase Shift of Feed Line

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- Microwave Q Measurement in the Presence of Phase Shift of Feed Line
- Acta Electronica Sinica Vol. 37, Issue 3, Pages: 646-648(2009)
- 作者机构：
  
  西北工业大学电子信息学院,陕西,西安,710072
- 作者简介：
- 基金信息：
- DOI：
  CLC： TM931
- Published：2009
- 稿件说明：
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WU Chang-ying, WEI Gao, XU Jia-dong. Microwave Q Measurement in the Presence of Phase Shift of Feed Line[J]. Acta Electronica Sinica, 2009, 37(3): 646-648.
DOI：

WU Chang-ying, WEI Gao, XU Jia-dong. Microwave Q Measurement in the Presence of Phase Shift of Feed Line[J]. Acta Electronica Sinica, 2009, 37(3): 646-648. DOI：

摘要

提出了一种实用的测量微波谐振器无载品质因素的方法

在临界点法的基础上

消除了馈线引入的相移.该相移的出现会使谐振器等效阻抗曲线在Smith圆图中发生旋转

进而影响到测量结果.通过在Smith圆图中对测量的输入阻抗曲线进行旋转

根据寻找出的一个目标函数来判断合适的旋转角度

即为馈线引入的相移.对所提出的方法进行了数值模拟

并通过了一组实测数据做了验证.

Abstract

A practical method of measuring microwave resonator unloaded

-factor is presented

which could eliminate phase shift of feed line when

-factor is estimated by critical-points method.The presence of the phase shift would rotate the resonator’s input-impedance locus in Smith Chart

thereby affecting measurement result.To de-embed the phase shift

an objective function was introduced to find the proper rotation angle caused by feed line instead of calibration using extra measurement.The method was demonstrated by simulation data and measurement data.

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Related Institution

Instituteof Microelectronics,Peking University, Beijing100871)Yu Zhongyu

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