Dual-channel RF power amplifier linearizer improves base stations' efficiency

May 18, 2016 // By Julien Happich
The SC2200 dual-channel RF power amplifier linearizer (RFPAL) from Maxim Integrated Products enables power amplifiers to consume up to 70% less power compared to a 37dBm power amplifier operated in back-off.

Available in a 11x11mm SAWN QFN package, it reduces the bill of materials (BOM) cost by up to 50%, and is up to 8x smaller than other digital pre-distortion (DPD) solutions on the market, claims the manufacturer. The SC2200 application, which occupies less than 1 square inch of board space, substantially increases power amplifier efficiency while consuming less than 1.5W when both paths are fully operational. This allows manufacturers to realize significant competitive advantages and helps operators meet their requirements for lowered operating and deployment costs.

With cellular data traffic increasing exponentially, the communications industry is migrating from voice-centric macro networks to heterogeneous networks with improved coverage and capacity. The SC2200 is a superior alternative to the inefficient method of operating power amplifiers in back-off, and is preferred over DPD since it requires no software or complex algorithm development. It features an integrated pre-amp and a single 1.8V supply, and works optimally for a wide range of power amplifier architectures, technologies, and power levels. The linearizer is suitable for 2G, 3G, and 4G systems, including TD-LTE and FD-LTE. It is ideal for cellular infrastructure applications such as macro and small cell base stations, distributed antenna systems (DAS), active antenna systems (AAS), remote radio heads, and other multiple-input multiple-output (MIMO) systems. Evaluation kits are available: SC2200-EVK900, SC2200-EVK1900 and SC2200-EVK2400

Visit Maxim Integrated at www.maximintegrated.com