Field pattern characteristics of GPR antennas
Sub-surface radar has become increasingly popular for carrying out completely non-invasive integrity tests on concrete structures. Commercial systems are available with a range of antenna frequencies that may be selected for an investigation. The choice of a particular antenna frequency is often a...
| Main Authors: | , , |
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| Format: | Article |
| Language: | English |
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Elsevier Science Ltd.
2002
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| Online Access: | http://eprints.utm.my/6725/1/AmiruddinShaari2002-FieldPatternCharacteristicsofGPR.pdf |
| _version_ | 1825909943743545344 |
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| author | Millard, S. G. Shaari, A. Bungey, J. H. |
| author_facet | Millard, S. G. Shaari, A. Bungey, J. H. |
| author_sort | Millard, S. G. |
| collection | ePrints |
| description | Sub-surface radar has become increasingly popular for carrying out completely non-invasive integrity tests on concrete structures. Commercial systems are available with a range of antenna frequencies that may be selected for an investigation. The choice of a particular antenna frequency is often a compromise between the physical size of the antenna and the penetration and resolution capabilities provided by the antenna. However, there is an interaction between a surface contact antenna and the substrate under investigation that will alter the field pattern being transmitted that may have significant implications for interpretation of results. An experimental programme is described in which the characteristics of commercially available 900 MHz and 1 GHz antennas are compared in air and when in contact with concrete and water surfaces, together with an emulsion used in previous studies to simulate the radar properties of concrete. Results are presented showing
the influence of the material being measured upon the signal divergence. These effects are considered in terms of the practical implications for field-testing using radar.
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| first_indexed | 2024-03-05T18:09:40Z |
| format | Article |
| id | utm.eprints-6725 |
| institution | Universiti Teknologi Malaysia - ePrints |
| language | English |
| last_indexed | 2024-03-05T18:09:40Z |
| publishDate | 2002 |
| publisher | Elsevier Science Ltd. |
| record_format | dspace |
| spelling | utm.eprints-67252017-10-22T04:06:11Z http://eprints.utm.my/6725/ Field pattern characteristics of GPR antennas Millard, S. G. Shaari, A. Bungey, J. H. TA Engineering (General). Civil engineering (General) Sub-surface radar has become increasingly popular for carrying out completely non-invasive integrity tests on concrete structures. Commercial systems are available with a range of antenna frequencies that may be selected for an investigation. The choice of a particular antenna frequency is often a compromise between the physical size of the antenna and the penetration and resolution capabilities provided by the antenna. However, there is an interaction between a surface contact antenna and the substrate under investigation that will alter the field pattern being transmitted that may have significant implications for interpretation of results. An experimental programme is described in which the characteristics of commercially available 900 MHz and 1 GHz antennas are compared in air and when in contact with concrete and water surfaces, together with an emulsion used in previous studies to simulate the radar properties of concrete. Results are presented showing the influence of the material being measured upon the signal divergence. These effects are considered in terms of the practical implications for field-testing using radar. Elsevier Science Ltd. 2002 Article PeerReviewed application/pdf en http://eprints.utm.my/6725/1/AmiruddinShaari2002-FieldPatternCharacteristicsofGPR.pdf Millard, S. G. and Shaari, A. and Bungey, J. H. (2002) Field pattern characteristics of GPR antennas. NDT & E International, 35 (7). 473Â-482. ISSN 0963-8695 http://dx.doi.org/10.1016/S0963-8695(02)00023-3 10.1016/S0963-8695(02)00023-3 |
| spellingShingle | TA Engineering (General). Civil engineering (General) Millard, S. G. Shaari, A. Bungey, J. H. Field pattern characteristics of GPR antennas |
| title | Field pattern characteristics of GPR antennas |
| title_full | Field pattern characteristics of GPR antennas |
| title_fullStr | Field pattern characteristics of GPR antennas |
| title_full_unstemmed | Field pattern characteristics of GPR antennas |
| title_short | Field pattern characteristics of GPR antennas |
| title_sort | field pattern characteristics of gpr antennas |
| topic | TA Engineering (General). Civil engineering (General) |
| url | http://eprints.utm.my/6725/1/AmiruddinShaari2002-FieldPatternCharacteristicsofGPR.pdf |
| work_keys_str_mv | AT millardsg fieldpatterncharacteristicsofgprantennas AT shaaria fieldpatterncharacteristicsofgprantennas AT bungeyjh fieldpatterncharacteristicsofgprantennas |