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RF/Microwave??

RF front end modules support 802.11 a/b/g WiFi products

Posted: 05 Aug 2005 ?? ?Print Version ?Bookmark and Share

Keywords:epicom? rf front-end module? 802.11b/g? 802.11a/b/g? front-end module?

Epicom announced a new family of four compact RF front-end modules for 802.11b/g and 802.11a/b/g WiFi products, which it reports have the smallest size, lowest current and highest efficiency in the industry.

The RF Front-End modules (fems) integrate the company's linearized power amplifiers with a T/R diversity switch, low noise amplifier, filters, diplexers, power detector, and all biasing and matching circuitry. The RF FEMs replace more than 30 discrete and IC components in a miniature package, requiring practically no external components when used in various applications, such as card bus, mini-PCI, PCI-Express, USB, and Compact Flash, SDIO, SPI designs.

These modules are designed to be easily adoptable by OEMs, ODMs, and CMs, increasing yield and reducing cost by providing pre-screened and guaranteed performance.

The FM2422 is a fully integrated low-current RF FEM designed for 2.4GHz dual-mode 802.11b/g WiFi applications where low operating current is desired for long battery life and ultra compact size such as in handheld PDAs and WiFi-enabled VoIP phones. This device features an output power of 15dBm at the antenna port with an error vector magnitude (EVM) of less than 4% and operating current of only 55mA when biased at 3.3Vdc.

The FM2423 is the higher power version of the FM2422 which provides output power of up to 18dBm with EVM of less than 4 percent and operating current of 150mA when biased at 3.3Vdc, which gives the best overall power efficiency and is most suitable for IT-based 802.11b/g WLAN applications such as USB, Mini-PCI and PCI-Express cards.

For dual-band 802.11a/b/g applications, the FM7704 provides similar low-current operation at both 2.4GHz and 5GHz. The FM7704 is a fully integrated low-current RF FEM designed for 802.11a/b/g WiFi applications such as PDA, smart and WiFi-enabled VoIP phones. This device features an output power of 15dBm at the antenna port with an EVM of less than 5 percent and operating current of 60mA when biased at 3.3Vdc for 2.4GHz and an output power of 15dBm with EVM less than 5 percent and operating current of 90mA when biased at 3.3Vdc across the 4.9GHz to 5.8GHz band.

The FM7705 is the higher power version of FM7704 and is most suitable for IT-based 802.11a/b/g applications such as PCI-Express cards. This device features an output power of 18dBm at the antenna port with an EVM of less than 5 percent and operating current of 130mA when biased at 3.3Vdc for 2.4GHz and an output power of 17dBm with EVM less than 5 percent and operating current of 170mA when biased at 3.3Vdc across the 4.9GHz to 5.8GHz band.

All Epicom RF FEMs are manufactured using SoC MMIC technology and are housed in a low cost standard QFN package, measuring 4-by-4-by-0.8mm for single band 802.11b/g applications (FM2422 and FM2423), and 5-by-5-by-0.8mm for dual band 802.11a/b/g applications (FM7704 and FM7705). Epicom reports that these are the smallest footprint FEMs for both 802.11b/g and 802.11a/b/g applications available on the market.

Pricing is under $1 for single band 2.4GHz FM2422 and FM2423, and under $2 for dual band FM7704 and FM7705 in volume. These devices are already available for sampling.

- Janine Love

eeProductCenter




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