Dual-frequency microwave moisture sensor based on circular microstrip antenna

被引：33

作者：

Ghretli, Mohamed Mustafa

Khalid, Kaida

Grozescu, Ionel Valeriu

Sahri, Mohd. Hamami

Abbas, Zulkifly

机构：

[1] Univ Putra Malaysia, Dept Phys, Serdang, Selangor, Malaysia

[2] Univ Putra Malaysia, Fac Forestry, Serdang 43400, Selangor, Malaysia

来源：

IEEE SENSORS JOURNAL | 2007年 / 7卷 / 11-12期

关键词：

dual microwave frequency sensor; microstrip antenna; moisture content; rubber latex;

D O I：

10.1109/JSEN.2007.908920

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 dual-frequency sensor was developed to measure moisture content of lossy liquids. The experiment is based on measurements of far-field reflection at two frequencies in the X-band, 8.48 and 10.69 GHz. The replacement of the conventional open horn antenna with microstrip radiating patches makes the sensor more versatile and compact. The sensor is interfaced to a notebook computer using a multipurpose data acquisition board and few custom made circuits. Data collection, errors correction and calibration modules were written using LabVIEW(R) programming language. Three calibration methods were used to obtain an empirical equation, which is applied to obtain the moisture content of the rubber latex samples. Moisture content can be determined with a standard error 0.49%.

引用

页码：1749 / 1756

页数：8