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| Experimental research on a shielding device of low frequency ground penetrating radar antenna |
| ZHANG Xiao-Bo1, 2, 3, BAI Da-Wei1, 2, 3, GAO Bao-Tun1, 2, 3, He Mei-Xing1, 2, 3, QIU Gen-Gen1, 2, 3 |
1. Eelectromagnetic Detection Technology Key Laboratory of Ministry of Land and Resources, Langfang 065000, China;
2.National Modern Geological Exploration Technology Research Center, Langfang 065000, China;
3. Institute of Geophysical and Geochemical Exploration, CAGS, Langfang 065000, China |
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Abstract The low frequency ground penetrating radar system is equipped with unshielded antenna and poor anti-jamming capability. For the low frequency ground penetrating radar with a center frequency of 15MHz, the authors designed and manufactured three different sizes of shielding devices (length×width×height: 12 m×12 m×5 m, 11 m×11 m×5 m, 9.6 m×9.6 m×5 m) with the iron wire mesh as the shielding material. The experimental research on shielding interference of the receiving antenna and the transmitting antenna of low-frequency ground penetrating radar was carried out respectively. When electromagnetic shielding experiment was carried out separately for the receiving antenna, the shielding devices of the three sizes showed better shielding effect, and the optimal size was 11 m×11 m×5 m. When the electromagnetic shielding experiment was carried out separately for the transmitting antenna, only the shielding device of 11m×11m×5m was the most effective, and the shielding effect of the other two devices was relatively poor. In contrast, it was better to add a separate shielding device to the receiving antenna than to add a separate shielding device to the transmitting antenna. The experimental results have laid a solid foundation for future research and development of the practical shielding device of low frequency ground penetrating radar.
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Received: 08 September 2017
Published: 20 December 2017
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