Dual frequency microstrip antenna sensor for water content measurements independent of temperature variation
Temperature variation causes errors in all indirect moisture measurement methods. To increase the accuracy of moisture content determination and to reduce the influence of temperature, a two-parameter measurement is used. The method uses the magnitude of reflected waves at two microwave frequencies...
| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
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Institute of Physics
2007
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| Online Access: | http://psasir.upm.edu.my/id/eprint/7670/ |
| _version_ | 1848840660812038144 |
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| author | Ghretli, Mohamed Mustafa Khalid, Kaida Grozescu, Ionel Valeriu Sahri, Mohd Hamami Abbas, Zulkifly |
| author_facet | Ghretli, Mohamed Mustafa Khalid, Kaida Grozescu, Ionel Valeriu Sahri, Mohd Hamami Abbas, Zulkifly |
| author_sort | Ghretli, Mohamed Mustafa |
| building | UPM Institutional Repository |
| collection | Online Access |
| description | Temperature variation causes errors in all indirect moisture measurement methods. To increase the accuracy of moisture content determination and to reduce the influence of temperature, a two-parameter measurement is used. The method uses the magnitude of reflected waves at two microwave frequencies in the X-band region. A dual frequency sensor system is developed to measure moisture content of dielectric-lossy liquids. The experiment is based on measurements of far-field reflection magnitudes at two different frequencies 8.48 GHz and 10.69 GHz using circular microstrip antennas. A calibration equation is sought that instantly gives temperature-independent moisture content of the samples under consideration. The sensor is integrated with a data acquisition card to record the detected reflection signals. The data analysis and error-correction technique are implemented using custom designed software. The system is tested using diluted rubber latex with moisture content ranging from 39.8% to 91.2% wet basis. The moisture content was predicted with a standard error less than 1.3% for the temperature range of 25 °C to 63 °C compared to the standard oven-drying technique.
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| first_indexed | 2025-11-15T07:30:53Z |
| format | Article |
| id | upm-7670 |
| institution | Universiti Putra Malaysia |
| institution_category | Local University |
| language | English |
| last_indexed | 2025-11-15T07:30:53Z |
| publishDate | 2007 |
| publisher | Institute of Physics |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | upm-76702010-08-20T04:22:06Z http://psasir.upm.edu.my/id/eprint/7670/ Dual frequency microstrip antenna sensor for water content measurements independent of temperature variation Ghretli, Mohamed Mustafa Khalid, Kaida Grozescu, Ionel Valeriu Sahri, Mohd Hamami Abbas, Zulkifly Temperature variation causes errors in all indirect moisture measurement methods. To increase the accuracy of moisture content determination and to reduce the influence of temperature, a two-parameter measurement is used. The method uses the magnitude of reflected waves at two microwave frequencies in the X-band region. A dual frequency sensor system is developed to measure moisture content of dielectric-lossy liquids. The experiment is based on measurements of far-field reflection magnitudes at two different frequencies 8.48 GHz and 10.69 GHz using circular microstrip antennas. A calibration equation is sought that instantly gives temperature-independent moisture content of the samples under consideration. The sensor is integrated with a data acquisition card to record the detected reflection signals. The data analysis and error-correction technique are implemented using custom designed software. The system is tested using diluted rubber latex with moisture content ranging from 39.8% to 91.2% wet basis. The moisture content was predicted with a standard error less than 1.3% for the temperature range of 25 °C to 63 °C compared to the standard oven-drying technique. Institute of Physics 2007 Article PeerReviewed Ghretli, Mohamed Mustafa and Khalid, Kaida and Grozescu, Ionel Valeriu and Sahri, Mohd Hamami and Abbas, Zulkifly (2007) Dual frequency microstrip antenna sensor for water content measurements independent of temperature variation. Measurement Science and Technology, 18 (4). pp. 1054-1060. ISSN 0957-0233 http://dx.doi.org/10.1088/0957-0233/18/4/013 10.1088/0957-0233/18/4/013 English |
| spellingShingle | Ghretli, Mohamed Mustafa Khalid, Kaida Grozescu, Ionel Valeriu Sahri, Mohd Hamami Abbas, Zulkifly Dual frequency microstrip antenna sensor for water content measurements independent of temperature variation |
| title | Dual frequency microstrip antenna sensor for water content measurements independent of temperature variation |
| title_full | Dual frequency microstrip antenna sensor for water content measurements independent of temperature variation |
| title_fullStr | Dual frequency microstrip antenna sensor for water content measurements independent of temperature variation |
| title_full_unstemmed | Dual frequency microstrip antenna sensor for water content measurements independent of temperature variation |
| title_short | Dual frequency microstrip antenna sensor for water content measurements independent of temperature variation |
| title_sort | dual frequency microstrip antenna sensor for water content measurements independent of temperature variation |
| url | http://psasir.upm.edu.my/id/eprint/7670/ http://psasir.upm.edu.my/id/eprint/7670/ http://psasir.upm.edu.my/id/eprint/7670/ |