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Nujira samples power amps for wireless systems

Posted: 25 May 2004 ?? ?Print Version ?Bookmark and Share

Keywords:nujira? power amplifier? wcdma? ofdm? symbionics?

Nujira Ltd, a developer of advanced power amplifier technology for WCDMA and OFDM modulation schemes, will sample its devices to selected customers by the third quarter, with production units available by early 2005.

Nujira said its patent pending modulator technology can deliver widely varying supply voltages and currents into an RF transistor load at amplifier efficiencies of 35 percent. It claimed this could save 30 percent of the total cost of ownership over the lifetime of a network of cellular basestations.

The first products were designed for high power cellular infrastructure applications, and a WCDMA PA reference design with linearizer will be available during the third quarter.

Since its formation in late 2002, Nujira has said its power amplifier technology is frequency agnostic, so it could also be applied to mobile handsets, satellite communications and point-to-point wireless links, including WiMAX systems.

Nujira's core technology, the so called HAT (high accuracy tracking) system, enables RF devices to be modulated on their drain in precise unison with the radio frequency envelope. The company said that by optimizing the efficiency of wireless transmitters, its technology can reduce the power requirements by some 60 percent, with reduced requirements for batteries, air conditioning units and power supply.

Tim Haynes, Nujira's CEO, said "We are demonstrating a 20W multicarrier WCDMA amplifier using high-accuracy envelope tracking. Delivering modulator efficiencies of over 90 percent at such high bandwidths and RF powers are the most difficult of scenarios." He added: "The poor efficiencies associated with WCDMA and OFDM systems need no longer be the case. The world of power amplifier design is about to change."

Nujira was founded by four engineers from the design consultancy group Symbionics, which was acquired by Tality in the late 1990s. It later became the design services subsidiary Cadence Design Systems Inc.

So far, the company has relied on seed investments. The largest, $850 000, was secured in November 2003 from Amadeus Mobile Seed Fund.

The company is believed to be on the verge of announcing it has raised significant funds to help market its technology and products. Haynes said Nujira plans to follow an intellectual property licensing model.

- John Walko

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