부산대학교 도서관

This article introduces a proposed methodology for using a printed array of radiators with concentric circular shapes in the context of vehicle-to-vehicle applications. The frequency band of 5.85 to 5.925 GHz is designated by the IEEE 802.11p standard for dedicated short-range communication, which is specially designed for vehicle applications. The development of the solitary radiator has included the use of circular constructions that adhere to the principles of the Fibonacci sequence. The proposed structure consists of five concentric rings, where the radius of each circle is multiplied by a ratio of 1.67. In order to establish a connection between all the rings, a vertical slit has been introduced, followed by removing a horizontal slit on the resulting structure. The Wilkinson power divider is used in the configuration of the feed network of an array in order to achieve a substantial level of isolation. The process of integrating antennas in CST Microwave Studio entails the use of a single-layer printed circuit board (PCB) composed of FR-4 laminate material with a relative permittivity of 4.40. The antenna and the array exhibit gains of 6.71 and 10.90 dBi, respectively, and feature a bandwidth coverage that surpasses 100%.Both antennas demonstrate a minimal level of cross-polarization in the primary beam orientation. Both antennas exhibit notable radiation efficiency and acceptable aperture efficiency, respectively. Due to its minimum correction factor values, the antenna has a diminished electromagnetic interference (EMI) and electromagnetic compatibility (EMC) impact. Both antennas are viable options for vehicular applications.