Analog Workshop 2023

A 2x2 12 GS/s Sampled Beam-Forming Receiver

This paper presents a 12 GS/s sampling-based beamforming receiver architecture for a 2x2 antenna-
array. Utilizing sample-based RF-channel summation approach eliminates all wave-length
dependencies by summing up all phase-aligned input signal samples. Isolating front-end- and back-
end-buffers are realized as push-pull pairs simultaneously increasing bandwidth and linearity.
Bootstrapped and body-driven track-and-hold-slices sample delay-correct the input waveforms. After
summation of all inputs, a total beam-forming gain of 8.9 dB is achieved. The linear front-end SFDR
and SNDR is >69 dBc and >56 dB respectively. Only a total of 30mW per antenna is drawn from a
triple -0.4/0.9/1.7V supply.