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Anadigics Inc of Warren, NJ, USA has launched the AWT6281 HELP3 WCDMA liner power amplifier (PA), engineered for use in advanced 3G handsets for extended GSM ( EGSM, Band 8) UMTS wireless networks. The new PA extends the operating time of 3G handsets and data cards, which is critical for operation using high-speed packet access (HSPA) networks. Anadigics says that the AWT6281 has been specified by leading chipset manufacturers for selected reference designs.

The latest member of Anadigics’ family of 3G HELP3 WCDMA linear power amplifier, the AWT6281 provides full compliance with HSDPA and HSUPA requirements and reduces average current consumption by 75% compared to competing devices, it is claimed. The PA provides low quiescent currents of 7mA without a DC-DC converter and eliminates the need for an external voltage regulator. The self-contained 4mm x 4mm x 1.1mm surface-mount package incorporates matching networks optimized for output power, efficiency and linearity. The AWT6281’s performance and integration capabilities are achieved using Anadigics’ patented InGaP-Plus technology, which combines bipolar and FET devices on the same GaAs die.

Engineered for UMTS900 operation, the AWT6281 enables manufacturers to design and develop the advanced 3G handsets and data cards required for conversion to UMTS900 worldwide, Anadigics says. A market study in February 2007 for the GSM Association by Ovum Consulting found that “...UMTS900 provides between 44% (in urban areas) and 119% (rural areas) increased coverage per Node-B compared with UMTS2100. This is primarily due to the propagation characteristics of the lower-frequency band and leads directly to lower capex and increased mobility benefits, providing a new option, with greater service capability, for operators…. Handset availability is crucial to the successful rollout of UMTS900, as the market will need to be populated with handsets which will work in the UMTS900 band and in other GSM and UMTS bands also.”

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