Nitronex and Nujira Collaborate on High Efficiency WiMAX Power Amplifiers

(Business News & Technology News, 23 Apr 2008)

Nitronex, a provider of GaN-on-Silicon RF power devices, and RF power efficiency specialists Nujira are collaborating to create a power amplifier reference design for WiMAX basestations delivering over 45 percent efficiency using GaN devices and High Accuracy Tracking (HAT) technology.

Using a four-channel WCDMA waveform the companies have been able to realise over 44dBm of linear power with 45 percent efficiency at a linearity of -55dBc and using conventional DPD (digital pre-distortion) techniques. The results were achieved using production ready devices from both companies. This same solution demonstrated its flexibility by achieving 43.2dBm of linear power with 43 percent efficiency under a demanding WiMAX waveform with 20MHz video bandwidth and 8.2dB PAR.

"Nitronex believes that GaN devices will most clearly establish their value when combined with advanced power amplifier techniques such as Nujira's HAT technology," says Chris Rauh, VP of marketing and sales at Nitronex. "We are especially excited that the results come from production ready technology from both companies which greatly increases our customers confidence in adopting this approach."

"Nujira HAT envelope tracking technology can greatly enhance the efficiency of power amplifiers, allowing the creation of modules that deliver both high energy efficiency over a broad frequency spectrum and flexibility. The same power modulator module can equally well be applied to WiMAX, WCDMA or even DVB and other transmission," says Nujira VP Strategy & Marketing Julian Hildersley.

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