A Novel Approach of Designing Insubstantial AVA operating in UWB for GPR Applications

Abstract

ABSTRACTGround Penetrating Radar (GPR) is one of the capable technologies for exposure and recognition of both metallic and non metallic objects masked under the ground. Bandwidth is one of the parameter for GPR system performance, very high frequencies are required for better resolution of microscopic objects. Ultra wide band GPR system can able to meet the current requirement with more efficiency. An Anti-podal Vivaldi Antenna (AVA) is proposed such that its operating frequency range varies from wideband to ultra wide band. A novel approach of designing Anti-podal Vivaldi Antenna is designed to increase the performance characteristics like gain, frequency of operation, radiation pattern, to reduce return loss, to reduce side lobes levels and to reduce the fabrication cost. In order to reduce the cost of fabrication, the substrate material preferred as denim material. The reason for choosing denim material is, it can be easily incorporated and it is homogeneous in nature. Anti-podal Vivaldi Antenna is designed, simulated using HFSS software and it is fabricated. The results obtained in the simulation process and the fabricated antennas are very relative to each other. The performance characteristics measured by simulation process achieves a maximum gain of more than 7dB and practical antenna achieves around 6.92dB with an operating frequency range from wide band to ultra wide band range from 5.2GHz to 13GHz.