Peraso developed the PRS1520 mmWave beamformer IC to meet the needs of 5G users, for equipment such as customer equipment, laptops, tablets and hotspots. The integrated RFIC has two independent, 16-channel beamforming arrays for dual polarization or dual-stream MIMO, and multiple RFICs can be used in tiled configurations for larger arrays. The PRS1520 covers all the 5G NR FR2 bands: 24.25 to 29.5 GHz for the n257, n258 and n261 bands and 37 to 43.5 GHz for the n259 and n260 bands. Each beamforming channel has a 5.6-degree phase resolution and the internal processor employs a unique approach for phase and amplitude adjustment that supports dynamic beam tables with thousands of entries. In transmit, the linear output power per element is 17 to 18 dBm, and the RFIC is biased with a single 5 V supply.

To support evaluation of array performance, Peraso is developing an evaluation module, the EVK-PRS1520, which integrates the beamforming RFIC with a printed circuit board containing a dual polarized antenna, supporting circuitry and a USB-C control interface. Including the antenna array, the module measures 50 x 92 mm. Sampling of the evaluation module is planned to begin during the third quarter of 2022. Each antenna polarization has 16 elements, enabling a total EIRP (both polarizations) of approximately 47 dBm in the n261 band. This demonstrates the PRS1520 is suitable for fixed wireless access customer equipment, small cell nodes and personal mobile hotspots.

Peraso is a fabless semiconductor company that has focused on mmWave since 2008. In addition to supporting the 5G FR2 bands, Peraso manufacturers 60 GHz RFIC products for wireless infrastructure and consumer electronics.

Peraso Inc.
San Jose, Calif.