High Sensitive Sensor for Microwave Moisture Measurements

Zhang Jan; Guan Ben-kang; Liu Shu-zhang

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High Sensitive Sensor for Microwave Moisture Measurements

更新时间：2025-12-08

- High Sensitive Sensor for Microwave Moisture Measurements
- Acta Electronica Sinica Issue 6, Pages: 55-60(1989)
- 作者机构：
  
  1. 电子科技大学
  2. 电子科技大学成都
- 作者简介：
- 基金信息：
- DOI：
  CLC：
- Published：1989
- 稿件说明：
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[1]张俭,关本康,刘述章.高灵敏度微波测湿传感器[J].电子学报,1989(06):55-60.

Zhang Jan, Guan Ben-kang, Liu Shu-zhang. High Sensitive Sensor for Microwave Moisture Measurements[J]. Acta Electronica Sinica, 1989, (6): 55-60.
[1]张俭,关本康,刘述章.高灵敏度微波测湿传感器[J].电子学报,1989(06):55-60. DOI：

Zhang Jan, Guan Ben-kang, Liu Shu-zhang. High Sensitive Sensor for Microwave Moisture Measurements[J]. Acta Electronica Sinica, 1989, (6): 55-60. DOI：

摘要

本文提出了一种提高微波测湿传感器灵敏度的新机理——微扰增强机理。设计出高灵敏度的带消失模谐振腔的单面开口式矩形双频腔

并给出该腔的理论分析。实验结果表明:在20℃一张厚8（μm）、湿度8％的电容器纸能够使测量模产生3MHz左右的频移。

Abstract

A new mechanism-"Pertubation Augmentation" is proposed to raise the sensitivity of the sensor for microwave moisture measurements. In the light of it

a high sensitive sensor is designed. The sensor is the open type of rectangular cavity

which resonates at two frequencies and has a eva-mode cavity mounted on it. Theoretical analyses for this kind of sensor are given. The results of experiments made on this sensor agree well with the theoretical analyses. A sheet of capacitor paper

which has a thickness of 8μm and a moisture of 8%

can cause the measuring mode a frequency shift of about 3MHz at the temperature of about 20℃.

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