2 × 2 Dual-Polarized Phased Array Testbench for 5G NR Communication and Video Transmission

Abstract

This paper presents a <tex xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">$2 \times 2$</tex> dual-polarized phased array testbench for fifth-generation (5G) communication system and video transmission. The transceiver chip is integrated with <tex xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">$2 \times2$</tex> dual-polarized antenna array on the printed circuit board (PCB). The antenna array has rotated feed design with more than 22 dB cross-polarization rejection at broadside. The antenna element can achieve a -10 dB impendence bandwidth of 3.25 GHz (24.25-27.5 GHz) and the array presents a measured effective isotropic radiated power (EIRP) at P1dB of 29 dBm and scans <tex xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">$\pm 30^{\circ}$</tex> in azimuth at 26 GHz. For validating its performance for 5G applications, dual-polarized communication link of 5G new radio (NR) signal of 400 MHz using two phased arrays is demonstrated. The error vector magnitude (EVM) degraded less than 0.1 % for dual-polarization operation compared to the single-polarization one. Also, the 1080p video transmission is validated by employing two phased arrays.