WiMAX power amplifier

The RF5633 is optimised for WiMAX systems, however it can be designed into multiple applications, including customer premises equipment (CPE), gateways, access points, wireless infrastructure, and WiFi-based wireless high definition interface (WHDI) for wireless video distribution networks. It integrates a 3-stage PA and power detector in a 4 x 4mm QFN package and works from a standard 5V supply, eliminating the need for additional power supplies. The RF5633 is also fully DC and rf tested, including EVM at the rated output power, maximising application yields and accelerating time-to-market. The RF5633 features InGaP HBT semiconductor technology and is packaged in a leadless chip carrier with a backside ground. It delivers EVM of 2.5% with an output power of 28dBm in the 3.4 - 3.6GHz frequency range, or 27dBm in the 3.6 - 3.8GHz frequency range. The bias of the PA may be controlled to accommodate a 22dB gain step to increase the dynamic range of the system. The RF5633 offers high gain of 34dB and high linear output power, it maintains linearity over a range of temperatures and power outputs while the external match enables tuning for output power over multiple bands. It also features internal input and inter-stage matching, a power-down mode and power detection.