A 24.25-29.5GHz 32-Element Integrated Phased-Array Antenna Based on a Scalable $4\times 4$ Antenna-in-Package Array Cell

This article presents a dual-polarized (+45 ° pol/- 45 °pol) 32-element integrated phased-array antenna, covering 3GPP 5G NR2 N258 / N257 bands (i.e., 24.25-29.5 GHz) based on the scalable 4 $\times 4$ antenna-in-package (AiP) array cell. The standard AiP array is based on the silicon-based CMOS phased- array ICs with 6-bit amplitude/phase control. By adopting the fan-out wafer level chip scale packaging (WLCSP) technology and the low-cost high-frequency multi-layer printed circuit board (PCB) integrated antenna methodologies, this work achieves the measured effective isotropic radiated power (EIRP) of over 47.3 dBm across 24.25G-29.5 GHz. When the dual- polarized antenna achieves a large scanned angle of $\pm 60^{\circ}$ (azimuth plane) and $\pm 45^{\circ}$ (elevation plane), the gain is degraded by 4.2 dB and 2.6 dB, respectively.