Marchand Balun Fed Printed Bowtie Antenna for Vehicle-to-Everything (V2X) Communications

This paper focuses on developing a printed Bowtie antenna that is fed by a marchand balanced-unbalanced (balun) circuit. The antenna is specifically designed to operate at a central frequency of 3.5 GHz, offering a wide response for vehicle-toeverything (V2X) communication. To facilitate the connection with the printed Bowtie antenna, a modification to the planar marchand balun is implemented to transform the unbalanced coaxial input circuit into a balanced configuration. The selection of the marchand balun configuration is based on its favorable attributes, including minimal loss, a wide bandwidth response, and straightforward implementation in planar structures. The proposed antenna is fabricated on a 0.8 mm thick Rogers RO4003C dielectric substrate. Characterization results Indicate that the implemented antenna demonstrates a bandwidth response of 0.94 GHz, with a reflection coefficient below –10 dB spanning from 3.15 GHz to 4.09 GHz. The far-field radiation pattern exhibits omnidirectional characteristics, making it suitable for connecting devices on the same plane. Consequently, the suggested Bowtie antenna is well-suited for V2X communication applications.