28 GHz Millimeter Wave Multibeam Antenna Array with Compact Reconfigurable Feeding Network

A switchable multibeam antenna array with a compact planar feeding network is presented. Operating within 1 GHz bandwidth at 28 GHz, this 4x4 antenna can generate one-beam, two-beam and four-beam patterns based on two phase states, which arc controlled by the reconfigurable feeding network. The whole structure is validated by simulating in CST Studio. The antenna is a promising candidate in millimeter-wave Massive MEMO for applications where multiple beams are required simultaneously.