Compact Bandwidth-Enhanced Honeycomb Fractal Antenna for Next-Gen Wireless and Radar Applications

This research introduces a miniaturized honeycomb fractal antenna with an integrated defected ground structure (DGS), specifically optimized for 5.8 GHz wireless and radar applications. The proposed fractal geometry leverages its unique self-similar structure to enhance radiation efficiency and impedance matching, enabling superior performance without increasing the antenna footprint. The inclusion of a defected ground configuration strategically modifies the current flow, minimizing surface wave propagation and thereby extending the operational bandwidth. Through rigorous simulations and experimental verification, the antenna exhibits a resonant frequency of 5.8 GHz, a return loss (S11) of −17.93 dB, a bandwidth of <tex xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">$250 \text{MHz}(5.67 \text{GHz}$</tex> to 5.92 GHz), and a peak gain of 2.79 dB. The radiation characteristics, defined by a wellfocused main lobe and minimal sidelobe interference, reinforce its suitability for applications requiring targeted energy transmission. Due to its compact size, low-profile structure, and effective electromagnetic performance, this antenna design is well-suited for deployment in WLAN, Dedicated Short-Range Communication (DSRC), Industrial IoT, and vehicular radar systems. The findings highlight the advantages of integrating fractal geometries with DGS to achieve compact yet highperformance antennas for modern communication systems.