Front-End Module Serves 900-MHz ISM Band

Aug. 19, 2010
WITH ADVANCED METERING INFRASTRUCTURE (AMI) and other applications in the Industrial, Scientific, and Medical (ISM) band gaining in popularity, the RF3858 front-end module is a promising solution for portable equipment in need of size reduction. It ...

WITH ADVANCED METERING INFRASTRUCTURE (AMI) and other applications in the Industrial, Scientific, and Medical (ISM) band gaining in popularity, the RF3858 front-end module is a promising solution for portable equipment in need of size reduction. It also reduces the number of components outside of the core chipset. The RF3858 contains a power amplifier (PA) transmit/receive (Tx/Rx) transfer switch, low-noise amplifier (LNA) with bypass mode, and matching components. That LNA operates on DC supply current of 32 mA and +5 dBm input power. The 1-W, 915-MHz PA can deliver +31.5 dBm output power. Aside from the LNA, the PA is combined with a double-pole double-throw (DPDT) Tx/Rx transfer switch and a Tx harmonic filter. The module offers 27 dB gain with a noise figure of 1.3 dB. P&A: available now; $2.28 in 10,000Q.

RF Micro Devices, Inc., 7628 Thorndike Rd., Greensboro, NC 27409-9421; (336) 664-1233, Internet: www.rfmd.com.

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