A Miniaturized UWB Planar Patch Antenna for Short Range Wireless Applications

This article presents the design and performance analysis of a highly efficient ultra-wideband (UWB) antenna for short-range wireless applications. It operates in the frequency range from 3.92 GHz to 23.94 GHz and resonates at 6.73 GHz, 14.75 GHz, and 21.7 GHz. The designed antenna features an innovative and compact structure of $12 \times 20 \times 1 \mathrm{~mm}^{3}$, modeled on a Rogers RT5880 (lossy) substrate material that yields minimal loss and high radiation efficiency (beyond $80 \%$) across the entire operating spectrum. The maximum radiation efficiency of $94 \%$ is attained at 5.2 GHz. The antenna exhibits consistent radiation characteristics with the highest gain and directivity values of 3.7 dBi and 4.6 dBi respectively. The design is particularly compatible with ultra-wideband (UWB), Ku band, and some of the K band making it suitable for modern short-range wireless communication systems. It offers a significant improvement in bandwidth and efficiency.