A 4-Channel UWB Beam-Former in 0.13μm CMOS using a Path-Sharing True-Time-Delay Architecture

A fully integrated 4-channel UWB beam-former in 0.13μm CMOS uses a path-sharing true-time-delay architecture with 15ps resolution. The 3.1×3.2mm
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chip produces 11 different scanning angles within plusmn60deg with 10° spatial resolution for 25mm antenna spacing. The front-end achieves an NF of 2.9 to 4.8dB across 18GHz of BW with less than 5ps of group delay variation.