A microstrip resonator with slotted ground plane for complex permittivity measurements of liquids

被引：43
|
作者：
Liu, Changjun [1 ]
Pu, Yang [1 ]
机构：
[1] Sichuan Univ, Sch Elect & Informat Engn, Chengdu 610064, Peoples R China
来源：
IEEE MICROWAVE AND WIRELESS COMPONENTS LETTERS | 2008年 / 18卷 / 04期
基金：
中国国家自然科学基金;
关键词：
microwave chemistry; microstrip transmission line; permittivity measurement; planar circuit;
D O I：
10.1109/LMWC.2008.918894
中图分类号：
TM [电工技术]; TN [电子技术、通信技术];
学科分类号：
0808 ; 0809 ;
摘要：
A novel microstrip resonator is designed to measure complex permittivities of liquids with medium loss. The enclosed resonator is based on a lambda/2 open-circuit microstrip line with a slot in the ground plane. It is immersed into the liquid under test to measure the S-parameter from 2.2 to 2.6 GHz. The complex permittivities of binary liquid mixtures of methanol and ethanol are reconstructed from the resonant frequency and the unloaded quality factor. The experimental results agree with reference values. The maximum errors are 4.4% and 8.6% for the real and imaginary part of the permittivity, respectively.
引用
收藏
页码：257 / 259
页数：3
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