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Avago Technologies Announces FBAR Filter Design Wins In 15 Smart Phone Frequency Bands

SAN JOSE, Calif. and SINGAPORE, Oct. 9, 2012 (GLOBE NEWSWIRE) -- Avago Technologies (Nasdaq:AVGO), a leading supplier of analog interface components for wireless, wireline, and industrial applications, today announced design wins for multiple products based on their Film Bulk Acoustic Resonator (FBAR) filter technology, supporting operation in 15 different frequency bands.

Phones that need to operate on many different frequency bands, in multiple regions of the world, and that support high speed LTE voice and data transmissions are increasingly using Avago FBAR technology to solve difficult filtering problems. 4G/LTE capable phones often operate on newly allocated frequency spectrum adjacent to pre-existing radio services, with the potential for interference between these services. The steep filter skirts and superior out-of-band rejection of filters based on FBAR technology allow today's smart phones to function in congested spectrum while avoiding interactions that would otherwise decrease or interrupt data throughput. Additionally, the low loss of FBAR filters helps compensate for the higher losses associated with combining multiple bands in a radio front end, improving signal reception and battery life. As multi-band smart phones become more popular, these advantages are leading to the rapid adoption of FBAR technology throughout the mobile phone ecosystem.

"FBAR technology has gone mainstream. Three years ago, when most applications were 3G based, only 4-5 different bands benefited from using FBAR filtering," said Bryan Ingram, Sr. Vice President and General Manager of Avago Wireless Semiconductor Division. "Now, as worldwide carriers move to 4G/LTE, filter specifications are much more stringent, and in many cases FBAR filters are the best solution to meet the requirements. To fulfill this demand, Avago now supports as many as 15 different frequency bands with FBAR products."

The requirements of Band 7, one of Europe's main LTE deployment bands, provide an example of how FBAR filtering can improve smart phone operation. Band 7 (2600 MHz) is located just above the frequencies used for WiFi in Europe. WiFi is a service that often operates simultaneously with a 4G/LTE session, for example when using a smart phone as a WiFi hotspot. Without superior filtering, the WiFi transceiver can potentially be "blocked" or overwhelmed by the LTE transmission on Band 7. The Avago ACMD-6107 duplexer provides sufficient protection to allow operation on even the highest frequency (closest) WiFi channels without interference. Competing filters do not provide the required out-of-band attenuation as effectively, possibly rendering the upper WiFi channels unusable. Used in conjunction with an Avago ACPF-7124 WiFi coexistence filter, the combination provides unparalleled performance that meets or exceeds system requirements.

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