Key parameters achieved included; noise figure < 6 dB using UC San Diego transmit/receive phased-array chips; 42 dBm equivalent isotropic radiated power (EIRP); scans ±50 degrees with sidelobes < –14 dB (32-element antenna) uses the TowerJazz high-performance SiGe BiCMOS SBC18H3 process; and employs Keysight hardware and software for signal generation and analysis.
Acting as a reminder that for all the talk of 5G, the details are still very much in the research domain, Keysights’ collaboration with UCSD is claimed as the world’s longest bidirectional phased-array link in the 60 GHz band. At a link distance of 300m, the 32-element array achieved a data rate of greater than 2 Gbps over all scan angles up to ±45 degrees. Data rates were 4 Gbps at 100m and 500 Mbps at 800m over most scan angles. Initial tests by a leading wireless provider suggest the system can deliver content to eight homes at a time at up to 300m.
The entire phased array consumed 3 to 4W of DC power in either its transmit (Tx) or receive (Rx) modes. This is due to the high-performance system-on-a-chip (SoC) designs UC San Diego created using the third-generation silicon germanium BiCMOS standard buried collector (SiGe BiCMOS SBC18H3) process from speciality foundry TowerJazz.
Keysight hardware and software enabled rapid prototyping of the system, as well as link equalization and performance measurements at 2 GHz modulation bandwidth. Central hardware elements were the M8195A arbitrary waveform generator , E8267D PSG vector signal generator and DSOS804A high-definition oscilloscope .
UC San Diego used Keysight’s Signal Studio software to define and generate the 60 GHz 802.11ad waveform, which was the basis for development. Keysight’s 81199A Wideband Waveform Center software helped the team link Tx and Rx, apply digital pre-distortion and improve error vector magnitude (EVM) performance. The team also used Keysight’s 89600 VSA software to perform demodulation and analysis of advanced signals.
The H3 process is part