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June 06, 2011

Nujira Makes Available a New Wideband Envelope Tracking Flexible FDS



Nujira has announced the availability of a new wideband Envelope Tracking (ET) Flexible Development System (FDS) for characterizing energy-efficient power amplifiers for global cellular frequency bands.

The Nujira (News - Alert) NCT-T9101 Coolteq FDS, according to company officials, allows operation and characterization of ET Power Amplifiers (PAs) at any RF frequency from 200 MHz to 2700 MHz. This covers all major cellular bands worldwide, and also most of the digital broadcast and military communications frequencies.

The FDS has been designed as a lab instrument for the development and characterization of Envelope Tracking PAs. Company officials said that it generates simultaneous RF and Envelope waveforms which can either be user-generated from arbitrary I/Q waveforms, or selected from a predefined library of 3G and 4G standards.

Envelope signals are output from a Flexible Envelope Port (FEP) interface module. They support both analogue (handset) and digital (infrastructure) envelope formats --standardized by the OpenET Alliance.

Comprehensive PC-based software supports real-time measurement and analysis of PA efficiency, linearity, and AM:AM/AM:PM distortion. Plus, the system can optionally be configured to include Nujira’s Digital Pre-Distortion (DPD) algorithms running in hardware or software, said company officials.

The system can be configured to support the development of a wide range of transmitters. These transmitters include 3G/4G smartphones, USB dongles, base stations, digital TV transmitters and military radios.

Nujira aims to dramatically improve the energy efficiency of transmitters for digital cellular and broadcast applications by reducing the amount of waste energy dissipated as heat in the RF Power Amplifier circuit.

With the new FDS, the company has demonstrated that a single standard handset PA can deliver 50 percent efficiency across the 1500 to 2100 MHz frequency band, said company officials.  

Earlier in April, Nujira announced the filing of its 100th patent, giving it the world’s most extensive and complete portfolio of patents filed or granted, covering envelope tracking and the implementation of efficient wideband power amplifier (PA) transmission systems.


Anshu Shrivastava is a contributing editor for TMCnet. To read more of Anshu’s articles, please visit her columnist page.
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