Design of a High-Gain Wideband Co-Planar Waveguide Antenna for Wireless Communications Using Metamaterial Techniques

This study presents the design and analysis of a compact metamaterial-based antenna, tailored for wideband wireless communication systems and intended primarily for commercial use. The antenna combines a Co-planar Waveguide (CPW) structure with a Square Ring Resonator (SRR), aiming to boost both bandwidth and gain. Fabricated on a standard FR4 substrate with overall dimensions of 24 × 24 × 1.6 mm³, the antenna’s performance was first optimized using CST Microwave Studio, a full-wave Electromagnetic (EM) simulation platform. Key parameters, such as the reflection coefficient (S11), radiation pattern, and gain were thoroughly evaluated. The simulation predicted a wide operating bandwidth of 7 GHz, ranging from 2.8 to 9.8 GHz, with a peak gain of 4.7 dBi. Following fabrication via photolithography, an experimental validation was carried out using a Vector Network Analyzer (VNA). The measured results demonstrated excellent agreement with the simulations, revealing an even broader bandwidth of approximately 8.2 GHz (1.58–9.8 GHz) and a slightly improved peak gain of approximately 5.14 db. These findings confirm the reliability of the proposed design and underline its potential as a practical solution for modern wideband wireless applications.