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LNA, power amp target wireless net femtocells

Posted: 13 May 2010 ?? ?Print Version ?Bookmark and Share

Keywords:MMIC? wireless network? LNA? power amplifier?

Freescale Semiconductor is making its way to the GaAs monolithic microwave IC (MMIC) sector with the launch of four devices aimed at macro base stations, repeaters and femtocells employed in wireless networks.

The devices address LNAs and transmit power amplifierstwo elements of wireless infrastructure equipment for which extremely high RF performance is critical. The devices are also designed for low power consumption, resulting in optimized energy efficiency and long-term reliability.

The MML09211H is an enhancement-mode pHEMT MMIC LNA intended for applications ranging from W-CDMA base stations in the 865MHz to 960MHz band to the high-data rate networks currently being implemented in the 728MHz to 768MHz band. The device offers a low noise figure of 0.6dB including circuit losses, and supports operation from 400MHz to 1400MHz. Small-signal gain is 20dB at 900MHz, P1dB output power is 21dBm, isolation is -35dB, and third order output intercept point (IP3) is 32dBm at 900MHz.

The MMA20312B is a two-stage InGaP HBT power amplifier designed for use in wireless base stations as well as repeaters and femtocells. Specifically, for femtocells this device enables high energy efficiency while meeting linearity requirements. The amplifier covers 1800MHz to 2200MHz, delivers P1dB output power of 31dBm at 2140MHz and small-signal gain of 26dB.

The two other new broadband MMIC amplifiers are equally suited for use as driver amplifiers in the transmit chain or as second-stage LNAs in the receive chain. They exhibit high linearity with lower current consumption than typical HBT solutions. The MMG15241H is a pHEMT device that covers 500MHz to 2800MHz, with a noise figure of 1.6 dB at 2140 MHz, P1dB output power of 24dBm, IP3 of 39dBm, and small-signal gain of 15dB. The MMG20271H LNA covers 1500MHz to 2400MHz, with a noise figure of 1.8dB at 2140MHz, P1dB output power of 27dBm, IP3 of 42dBm, and small-signal gain of 15dB.

Pricing is approximately $1 each. The devices are planned for limited sampling by June and general sampling by August.

- Ismini Scouras

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