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HBT power amps target linear WiMAX apps

Posted: 04 Jul 2006 ?? ?Print Version ?Bookmark and Share

Keywords:Mimix? CHV2707? CHV2710? CHV2711? power amplifiers?

Power amps for linear WiMAX apps

Mimix Broadband has introduced a family of internally pre-matched power amplifiers designed for linear WiMAX applications at 700MHz, 2.5GHz and 3.5GHz. According to the company, these devices are processed in a highly repeatable InGaP high-voltage, heterojunction bipolar transistor (HBT) process and include on-chip diodes for ESD protection.

This family of devices promises 11dB of gain and less than 2.5 percent EVM at 30dBm output power, with an OFDM input signal and a peak to average ratio (PAR) of 9dB. The devices operate off a single supply voltage up to 12V and include internal active bias circuitry. The CHV family includes the added feature of analog adjustment of bias current to address a variety of applications, Mimix said.

These linear power amplifiersthe CHV2707, CHV2710 and CHV2711operate at 700MHz, 2.5GHz and 3.5GHz, respectively. Evaluation boards are available to help engineers test the products and apply them to their designs.

"The complex data formats associated with WiMAX signals make it essential that these amplifiers provide exceptional linearity at the highest data transmission format, and that they are adjustable when lower data formats are used. By delivering 1W average power under maximum data transmission, including on-chip bias circuitry, and providing a separate bias current adjustment in a standard QFN plastic package, we provide our broadband customers with unparalleled performance, flexibility and cost savings," said Damian McCann, the company's CTO.

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