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Power amp geared for mobile WiMAX systems

Posted: 25 May 2009 ?? ?Print Version ?Bookmark and Share

Keywords:WiMAX? 4G? power amplifier?

AWM6433 PA

Anadigics Inc. has rolled one of the first mobile WiMAX 4G power amplifiers (PAs) developed for use in the 3.4- to 3.6GHz spectrum adopted by broadband wireless service providers in Europe and South America.

The AWM6433 is optimized for mobile WiMAX applications through the delivery of exceptional linearity and efficiency across all output power levels. Anadigics offers manufacturers a complete family of WiMAX PAs that support subscriber products developed for the 2.3- to 2.4GHz (South Korea and Malaysia), 2.5- to 2.7GHz (United States, Taiwan, Russia and Japan) and 3.4- to 3.6GHz frequency bands.

The power amp ensures outstanding mobile performance in USB dongles, data cards, smart phones and notebooks that address the growing WiMAX market. According to a report from Juniper Research, which analyzed over 30 countries, the mobile WiMAX 802.16e market will grow to $23 billion by 2013, with subscriber levels predicted to reach over 80 million over the same time frame.

Anadigics' AWM6433 supports both the IEEE 802.16d-2004 and 802.16e-2005 standards, enabling the design of equipment for use during the transition from fixed-point to mobile technologies. Facilitated by Anadigics' WiMAX PAs, this migration is expected to enable a rapid expansion of the customer base for existing networks.

The AWM6433 exceeds 20 percent operating efficiency at +24dBm output power, when powered by a 3.3V supply, while also meeting ETSI-recommended spectrum mask limits. The AWM6433 is designed to provide an increase in the maximum linear output power with an increase in the supply voltage up to 4.2V, a feature which supports 4G systems that require slightly higher subscriber transmit power levels.

The AWM6433 has the same package footprint and pinout as other products in Anadigics' WiMAX PA family to ensure simplified designs and ease of manufacturability for OEMs. ANADIGICS currently offers the AWM6430 and AWM6432, 6V devices that operate in the 3.4GHz to 3.6GHz frequency band, and the AWM6422 and AWM6423, 3.3V mobile devices that operate in the 2.5GHz bands.

Glenn Eswein, director of product marketing for Anadigics, states, "The AWM6433 is one of the first power amplifiers available for mobile WiMAX in the 3.5GHz spectrum, and will power an evolution from fixed-point systems, currently based on the 802.16d standard, to 802.16e mobile platforms."

Joe Cozzarelli, director of Anadigics' wireless infrastructure and WiMAX product development, adds, "The AWM6433 exhibits high power efficiency not only at the maximum output power levels, but also at lower output power levels. This efficiency translates to substantially increased battery life for consumer applications where the usage model includes a wide range of transmit powers."

The AWM6433 includes an integrated 25dB step attenuator, output power detector, and input and output RF impedance matching circuits. Offered in a 4.5mm x 4.5mm x 1mm low-profile module, this highly integrated device minimizes board layout space and enables RF front end solutions for size-constrained applications.

The AWM6433 is manufactured using Anadigics' proprietary InGaP-Plus process technology, to combine unmatched levels of functional integration with superior RF performance.

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