An ultra-wide dual band metamaterial based miniaturized rhombus structured patch antenna for K and Ka-bands

Abstract

The preeminent objective of this study to build a miniaturize, ultra-wide band antenna having a rhombus shaped as a patch incorporating metamaterial structure having two split ring resonators. This design offers two resonant frequencies of 23.48 & 26.69 GHz on a patch size of 4 mm × 3.2 mm having a total thickness of 0.3 mm. The design of this structure is befitting for various applications like radar, satellite communications, automotive radars, and other K and Ka-band applications. The design is made compact by deploying metamaterial resonator structure which reduces the size of antenna. The main highlight of this work is its uniqueness in terms of small size, large bandwidth and gain. The suggested antenna can achieve two bandwidths from 23 GHz to 24.15 GHz suitable for K-band application and 25 GHz to 26.1 GHz suitable for Ka applications having VSWR less than 2 which most desired in antenna patterns. This study has been analyzed and designed using Ansys HFSS using the numerical technique Finite Element Method (FEM). The design finds its applicability in terms of compact size, reasonable gain, and radiation pattern making it most suited for applications in satellites and radars systems.