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RF power transistors eye 2.5-2.7GHz WiMAX

Posted: 07 Apr 2008 ?? ?Print Version ?Bookmark and Share

Keywords:2.5-2.7GHz WiMAX? LDMOS? RF power transistor? power amplifier?

Infineon Technologies AG has released two new LDMOS RF power transistors targeting wireless infrastructure applications such as WiMAX in the 2.5-2.7GHz frequency band. These products, which provide peak output power of up to 170W, extend Infineon's broad portfolio of RF power transistors for WiMAX applications, which currently includes 10W, 45W and 130W devices. The high peak power performance of the LDMOS RF power transistors will enable designers to simplify their RF power amplifier designs.

"With this addition to its comprehensive product portfolio, Infineon continues to offer the highest peak power RF power transistors in the market," said Helmut Volger, VP and general manager for RF power at Infineon. "As the wireless infrastructure market adopts WiMAX and other new technologies, such products as Infineon's LDMOS RF power transistors, with their enhanced features and capabilities, become a crucial element in a designer's tool kit. The higher peak power enables designers to develop a simpler design, and lowers the overall bill of materials."

PTFA260851E/F 85W FET features 14dB gain (typical) and 22 percent efficiency (typical) at 16W average output power, under WiMAX signal conditions. PTFA261702E 170W FET features 15dB gain (typical) and 20 percent efficiency at 32W average output power, under WiMAX signal conditions.

Infineon's PTFA261702E is rated at 170W (P-1dB), the industry's highest peak output power in the 2.5-2.7GHz band. The transistor's architecture provides electrically isolated halves that ease use in Doherty power amplifier applications. The device can also be used in a push-pull configuration for extended bandwidth performance.

Both products are available in Pb-free, RoHS-compliant ceramic packages. Operating at 28V, these transistors provide broadband internal matching, and are capable of handling a 10:1 VSWR (voltage standing wave ratio) at CW (continuous wave) power output and 28V supply voltage.

The PTFA260851E/F and PTFA261702E devices are now in production. Pricing information available from the company.

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