Scalable Planar Phased Array Antenna with Dual Polarization and Metasurface Shield at 28 GHz

A high performance dual-polarized planar antenna array with metasurface shield was proposed. This novel shield and its arrangement were first demonstrated in scalable phased array configuration. The presence of this shield improved the active reflection coefficient for about 4 dB without reducing the radiation performance and antenna gain. The measured realized gain of the antenna array was 13.5 to 15 dBi from 26.5 - 29.5 GHz for both polarizations. The measured impedance bandwidth was below −10 dB from 25 - 29.5 GHz. The measured isolation of polarization port was >30 dB. The active reflection coefficient was maintained below −10 dB for different scan angles up to ±45°, both plane cuts, and polarizations. The integration of the antenna array and beamformer chips was demonstrated with OTA measurement for two-tile and one-tile configuration in Tx mode of the chip.