A flat, broadband and high gain beam-steering antenna for 5G communication

A flat and low profile, wideband and high gain Substrate Integrated Waveguide (SIW) Transmission Line (TL) Butler Matrix (BM) beamforming network (BFN) for beamforming and beam-steering applications at 28 GHz (5G) is presented in this paper. Four distinct beams steering between -35° to 35° with sidelobe and return-loss level below -10 dB are generated by connecting the proposed BFN to microstrip antennas forming a phased array antenna. The simulated and measured results are shown and discussed.