A Novel FSS for High/Low Frequency Band Beam Transparent Scanning/Grounding

5G antenna array covered by a novel frequency selective surface(FSS) is proposed in this paper for 5G antenna array applications. Proposed FSS has a pass-band between 3.3GHz to 3.8GHz with the transmission coefficient greater than −0.5dB, which has negligible impact on the antenna pattern, and the reflection coefficient of the FSS is greater than −1dB between 0.5GHz to 2.2GHz, which serves as a reflector for other band antennas. The antenna array below FSS consists of four elements operated in band of 3.3–3.6 GHz, and gains above 10dB are achieved with no pattern distortion.