Analysis and Design of Wide Band 28/38 GHz Antenna Array Integrated with 3D printed Dielectric Lens For 5G Automotive Applications

Abstract

This paper presents the design of a Chebyshev linear antenna array (CLA) integrated with the dielectric lens. In comparison to a uniform amplitude distribution (UAD), a Chebyshev amplitude distribution (CAD) is used to achieve a low side lobe level (SLL) characteristic and increase the directivity of the antenna array. The proposed CLA is optimized to operate at a high fifth generation (5G) frequency. The proposed CLA achieves a -10 dB broadband width from 25.8 GHz to 42.4 GHz. The dielectric lenses can be employed to modify the phase and amplitude of the antenna array, which increases the realized gain and leads to stable radiation over the operational bandwidth. The main purposes of the dielectric lens are to improve the realized gain, enhance efficiency, and result in stable radiation pattern properties. The CLA is integrated with an epoxy resin dielectric lens, which has a relative permittivity (εr) of 2.716. The proposed CLA integrated with a dielectric lens has a realized gain of 15.2 dB at 28 GHz and 11.94 dB at 38 GHz, respectively. The proposed design is simulated using CSTMWS2020 and HFSS. However, to verify the obtained results, the proposed design is fabricated using a photolithography process technique, and the dielectric lens is fabricated using a 3D printing technique.