Design and Modal Analysis of a High Gain CavityBacked Bowtie Antenna

In this work, a novel cavity backed leaf-shaped bowtie antenna is designed using Characteristic Mode Analysis (CMA). The developed antenna is backed by a rectangular cavity to get Uni-directional radiation pattern with high gain and good Front-to-back-ratio characteristics. CMA technique is used in the design and optimization of the rectangular cavity structure. The developed antenna resonates from 0.8 to 4.3 GHz with stable radiation characteristics giving a maximum gain of 11.5 dBi and FBR of 15.2 dB, making it suitable for applications like Ground Penetrating Radar (GPR) etc.