Abstract：A kind of miniaturized GPR antenna was designed through complex loading to the bow-tie dipole. The introduction of multiple loading methods not only makes the antenna acquire the performance of broadband but also greatly decreases the size of antenna compared with the theoretical calculation size. By introducing back cavity behind the antenna, the directivity and anti-jamming capability of the antenna are enhanced. The designed antenna possesses a 1.5 GHz~4 GHz frequency band width and a good direction. The designed antenna is successfully applied to the antenna system of 2.2 GHz LTD series of GPR. This designed antenna can be also used in the dangerous liquid goods inspection system of 3 GHz LTD series of GPR.
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