Nitronex and Nujira announced that they are working together to design a power amplifier (PA) reference design for WiMAX basestations delivering over 45% efficiency using GaN devices and high accuracy tracking technology.
Using a 4-channel WCDMA waveform the companies report that they have been able to realize more than +44dBm of linear power with 45% efficiency at a linearity of -55dBc using conventional DPD (digital pre-distortion) techniques. In addition, the companies claim that the same devices achieved +43.2dBm of linear power with 43% efficiency under a WiMAX waveform with 20MHz video bandwidth and 8.2dB PAR.
Samples of the NPT25100, simulation models and standard evaluation boards are available immediately from Nitronex. Samples of the amplifier pallet optimized for high accuracy tracking integrated with Nujira's power modulator enabling customers to develop amplifiers using their own DPD systems will be available in 3Q08.