Broadband antenna array with low cost PCB substrate for 5G millimeter wave applications

摘要

In this paper, a novel broadband antenna array is presented. The radiating element is a unique via-fed U-shaped patch element with a distribution network based on offset stripline technology. The feed position has been deliberately designed for optimized matching taking into account the design rules of a low cost PCB mass production technology. The radiating element has a 3-dB beam-width of ±30 degrees in both planes making it suitable for beam steering. To show the validity of the approach, a 2×2 array prototype is presented in this paper. The antenna array is approximately 12mm×12mm in size realized on a Rogers 4350 substrate. The antenna has been optimized for the 24–34 GHz frequency range. Simulated and measured return loss, radiation pattern and gain over frequency have been presented. This antenna structure is a good candidate for steerable phased arrays in 5G millimeter wave applications.