Multi-component mixture modeling for the dielectric properties of rubber wood at microwave frequencies
Dielectric properties from 1 to 18 GHz of rubber wood are modeled using generalized mixture equations and also with equations proposed by Weiner, Kraszewski, Looyenga and Landou, Lichtenecker. Dielectric properties were measured with an open-ended coaxial line-sensor in three structural directions l...
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| Format: | Article |
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Walter de GruyterBerlin
1999
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| Online Access: | http://psasir.upm.edu.my/id/eprint/116931/ |
| _version_ | 1848867122752520192 |
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| author | Khalid, Kaida Bin Kabir, Mohammed Firoz Daud, W.M. Sidek, H.A.A. |
| author_facet | Khalid, Kaida Bin Kabir, Mohammed Firoz Daud, W.M. Sidek, H.A.A. |
| author_sort | Khalid, Kaida Bin |
| building | UPM Institutional Repository |
| collection | Online Access |
| description | Dielectric properties from 1 to 18 GHz of rubber wood are modeled using generalized mixture equations and also with equations proposed by Weiner, Kraszewski, Looyenga and Landou, Lichtenecker. Dielectric properties were measured with an open-ended coaxial line-sensor in three structural directions longitudinal, radial and tangential and at different moisture contents. The dielectric constants were predicted well by the Weiner model for all structural grain directions and it was found that the degree of binding decreases with increasing frequency. However, the Weiner model cannot be used for predicting the dielectric loss factor at frequencies below 3 GHz. This may be due to the high conductive loss in this frequency region. The lower value of the exponents in generalized mixture equation was found suitable for fitting the experimental data as well as the Kraszewski equation. Values predicted by Lichtenecker equations are in well agreement with the experimental data at higher microwave frequencies. The prediction of dielectric loss factor using Kraszewski, Looyenga equations were not possible at frequencies below 3 GHz since it is dominated by conductive loss. Above 3 GHz, it was well predicted by Kraszewski and Looyenga equations. |
| first_indexed | 2025-11-15T14:31:29Z |
| format | Article |
| id | upm-116931 |
| institution | Universiti Putra Malaysia |
| institution_category | Local University |
| last_indexed | 2025-11-15T14:31:29Z |
| publishDate | 1999 |
| publisher | Walter de GruyterBerlin |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | upm-1169312025-04-18T03:33:02Z http://psasir.upm.edu.my/id/eprint/116931/ Multi-component mixture modeling for the dielectric properties of rubber wood at microwave frequencies Khalid, Kaida Bin Kabir, Mohammed Firoz Daud, W.M. Sidek, H.A.A. Dielectric properties from 1 to 18 GHz of rubber wood are modeled using generalized mixture equations and also with equations proposed by Weiner, Kraszewski, Looyenga and Landou, Lichtenecker. Dielectric properties were measured with an open-ended coaxial line-sensor in three structural directions longitudinal, radial and tangential and at different moisture contents. The dielectric constants were predicted well by the Weiner model for all structural grain directions and it was found that the degree of binding decreases with increasing frequency. However, the Weiner model cannot be used for predicting the dielectric loss factor at frequencies below 3 GHz. This may be due to the high conductive loss in this frequency region. The lower value of the exponents in generalized mixture equation was found suitable for fitting the experimental data as well as the Kraszewski equation. Values predicted by Lichtenecker equations are in well agreement with the experimental data at higher microwave frequencies. The prediction of dielectric loss factor using Kraszewski, Looyenga equations were not possible at frequencies below 3 GHz since it is dominated by conductive loss. Above 3 GHz, it was well predicted by Kraszewski and Looyenga equations. Walter de GruyterBerlin 1999 Article PeerReviewed Khalid, Kaida Bin and Kabir, Mohammed Firoz and Daud, W.M. and Sidek, H.A.A. (1999) Multi-component mixture modeling for the dielectric properties of rubber wood at microwave frequencies. Holzforschung, 53 (6). pp. 662-668. ISSN 0018-3830; eISSN: 0018-3830 https://www.degruyterbrill.com:443/document/doi/10.1515/HF.1999.108/html 10.1515/HF.1999.108 |
| spellingShingle | Khalid, Kaida Bin Kabir, Mohammed Firoz Daud, W.M. Sidek, H.A.A. Multi-component mixture modeling for the dielectric properties of rubber wood at microwave frequencies |
| title | Multi-component mixture modeling for the dielectric properties of rubber wood at microwave frequencies |
| title_full | Multi-component mixture modeling for the dielectric properties of rubber wood at microwave frequencies |
| title_fullStr | Multi-component mixture modeling for the dielectric properties of rubber wood at microwave frequencies |
| title_full_unstemmed | Multi-component mixture modeling for the dielectric properties of rubber wood at microwave frequencies |
| title_short | Multi-component mixture modeling for the dielectric properties of rubber wood at microwave frequencies |
| title_sort | multi-component mixture modeling for the dielectric properties of rubber wood at microwave frequencies |
| url | http://psasir.upm.edu.my/id/eprint/116931/ http://psasir.upm.edu.my/id/eprint/116931/ http://psasir.upm.edu.my/id/eprint/116931/ |