Compact Ultrawideband Slotted Bowtie-Dipole Antenna with 136.5% FBW for Next-Generation Wireless Communication and Sensing

This study introduces a compact ultrawideband bowtie antenna architecture with a tapered slot feed for wireless communication and sensing applications. The design features a modified bowtie-dipole antenna configuration with incorporated circular slots for bandwidth enhancement and a tapered slot feed for improved impedance matching. The substrate used is FR-4, with a dielectric constant of 4.3 and a tangent loss of 0.025. A 1 Oz (0.035 mm) copper patch is employed. A peak gain of 7.24 dBi is achieved at a center frequency of 9.24 GHz. The overall dimensions of the proposed design are <tex xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">$1.63\lambda\times 1.73\lambda$</tex>. The antenna achieves a fractional bandwidth (FBW) of 136.5%, operating within a frequency range from 2.93 GHz to 15.55 GHz. It is designed for easy integration with most printed circuit board (PCB) designs, making it well-suited for broadband wireless communication and sensing applications.