A Ka-Band 8-Stream Phased-Array Receiver with Time-Hopping Blocker Rejection for 6G Applications

This work proposes an area-efficient Ka-band non-uniform time-hopping (TH) phased array receiver that supports up to eight streams using only eight RF elements. By reusing RF signal paths for different streams through fast stream switching, the design significantly reduces chip area. Additionally, the proposed non-uniform TH technique mitigates blocker issues caused by switching harmonics through dithering. A prototype fabricated in 65nm CMOS demonstrates $4 \times 4$ MIMO signal reception in OTA measurements for both horizontal and vertical polarization, achieving a total data rate of 38.4 Gbps with a 42.9 dB improvement in blocker tolerance.