A Conformal Dual-Band CPW-MIMO Antenna for 5G-V2X Communication

Abstract

A Co-Planar Waveguide (CPW) fed conformal Multiple Input Multiple Output (MIMO) antenna is presented by deploying circular and rectangular patch in a stacked configuration. The analytical equations for the antenna are modeled and compared with the proposed antenna. The antenna is designed on a flexible polyimide substrate featuring a dielectric value of 3.5 with 0.1 mm thickness resonating at two frequencies, LTE-42 Band (5G-V2X) 3.4-3.6 GHz and Dedicated Short Range Communication (DSRC) 5.850-5.925 GHz. The design is further extended as a 4 × 4 MIMO structure by positioning the antenna elements orthogonal, separated by a distance of 10 mm. The antenna exhibits a reflection coefficient < −10 dB with a gain value between 4.5 and 5.25 dB over the desired frequencies. The radiation efficiency of the antenna is around 90% at both bands. MIMO parameters were measured to analyze the MIMO performance of the proposed antenna and the placement analysis of the antenna is studied by mounting the antenna on various vehicle positions and their corresponding pattern were characterized. The designed MIMO antenna is fabricated and tested, having an overall size of 85 × 85 × 0.1 mm3, offering extremely flexible design functioning to be a promising candidate for next-generation V2X Communication.