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    1. Technologies
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    FETs Target WiMAX PAs From 2500 To 2700 MHz

    May 13, 2008
    TWO LDMOS RF power transistors have debuted for wireless-infrastructure applications in the 2.5-GHz-to-2.7- GHz frequency band. By providing peak output power of up to 170 W, these transistors should help designers simplify their RF ...
    Nancy Friedrich

    TWO LDMOS RF power transistors have debuted for wireless-infrastructure applications in the 2.5-GHz-to-2.7- GHz frequency band. By providing peak output power of up to 170 W, these transistors should help designers simplify their RF power-amplifier (PA) designs. Under WiMAX signal conditions, the PTFA260851E/F single-ended, 85-W FET typically features 14 dB gain and 22 percent efficiency at 16 W average output power. Its sibling, the PTFA261702E push-pull, 170-W FET, typically features 15 dB gain and 20 percent efficiency at 32 W average output power under WiMAX signal conditions. The transistor's architecture provides electrically isolated halves that ease use in Doherty PA applications. Operating at +28 VDC, these transistors include broadband internal matching. They are capable of handling a 10:1 VSWR at continuous-wave (CW) power output and +28-VDC supply voltage.

    Infineon Technologies, 640 N. McCarthy Blvd., Milpitas, CA 95035; (866) 951-9519, Internet: www.infineon.com.

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