Physics / mechanism
Beamforming ICs steer antenna arrays by controlling the phase and amplitude of RF signals across individual elements, producing constructive interference in target directions and destructive interference elsewhere — without mechanical movement. Core architecture: phase shifters (4–6 bit resolution typical), variable gain amplifiers, T/R switches, and a combining network, all integrated per-channel. Monolithic designs in SiGe BiCMOS or bulk CMOS handle mmWave bands (28 GHz, 39 GHz, 77 GHz automotive radar, E-band backhaul). State-of-the-art 5G phased-array front-ends achieve <5 dB noise figure, >15 dBm saturated output per element, scanning ±60°. Channel counts range from 8 to 256+ in production silicon; latency for beam switching is sub-microsecond.
Competitive landscape
Key competing approaches: optical beamforming (true time delay, avoids beam squint, still largely pre-commercial), digital beamforming (full flexibility, massive DSP/ADC power cost, dominates massive MIMO baseband), and hybrid beamforming (splits analog/digital, dominant in sub-6 GHz and early mmWave). Adjacent ICs: LNAs, PAs, and RF switches increasingly co-packaged or co-integrated. Main suppliers: Sivers Semiconductors, Movella/Anokiwave, Renesas (IDT lineage), Qualcomm, Intel (E-band), Analog Devices, and RFMD/Qorvo for GaAs alternatives.
Companies using
Connected ideas
Sources
Frontier (open questions)
- To be added.