Enhancing Wireless Communication with Compact SIW Resonator-based UWB Fork Monopole Antenna

The rapid expansion of wireless communication across networks and devices, driven by advancements in the Internet of Things (IoT), highlights the need for compact, lightweight, cost-effective, and efficient antennas to meet market demands and support wireless systems. Patch and substrate-integrated waveguide (SIW) antennas have emerged to address these needs. In this study, a substrate-integrated waveguide resonator is used to construct an ultra-wideband (UWB) fork monopole antenna. The SIW resonator enhances antenna performance and bandwidth while reducing weight and dimensions. A prototype antenna was designed, manufactured, and evaluated through experimental tests. The impact of integrating array holes into the antenna on bandwidth characteristics is also examined. Significant performance improvements are demonstrated by the proposed SIW-based UWB fork monopole antenna. Simulations and experimental results show a bandwidth improvement of up to 10.1 GHz, an S11 value reduction to -47.5 dB with one array of holes, and a gain increase to 4.9642 dB. These metrics confirm the antenna's effectiveness in overcoming traditional bandwidth limitations and improving overall performance.