A 2-layer 45 degree Slanted Phased Array Antenna with Baffles for 5G mmWave Applications Based on Gap Waveguide Technology

A phased array antenna is designed based on the gap waveguide technology which offers a fair trade-off between costs and manufacturing flexibility at the mmWave frequencies. Only two layers will be used to reduce manufacturing difficulty and costs. The final design consists of 8 parallel arrays of 8 slots each, and baffles are used to prevent grating lobes. The slots have been slanted 45 degrees for enabling easier polarization diversity. The antenna operates in the 26.5 - 29.5 GHz band, which is used for 5G applications. A average realized co-polar gain of 24.4 dBi is reached for a 0 degree scan angle, while keeping a total active reflection coefficient below -10 dB and a cross-polarization ratio of at least 25 dB.