RF Micro Devices unveiled a highly integrated new front-end module (FEM) that delivers a complete integrated solution for handset/handheld WiFi 802.11b/g/n and Bluetooth systems.
The RF5755 integrates a 2,5 GHz power amplifier (PA), multithrow switch (SP3T), low noise amplifier (LNA) and power detector coupler. It also features integrated matching circuitry with output harmonic attenuation. The IC is packaged in a small 16-pin QFN package (3 x 3 x 0,5 mm).
The device features high linear output power (20 dBm) allowing high efficiency and low EVM for 11n applications; the ability to switch between WiFi transmit, WiFi receive or Bluetooth (transmit or receive); reduced need for a high loss/ attenuation filter at the FEM output; high IIP3 and gain; simultaneous receive of WiFi and Bluetooth with positive gain in both paths (utilising the SPST switch after the LNA); and a direct-to-battery connection eliminating the need for additional DC circuitry. The integrated power detector coupler decreases sensitivity to voltage supply, temperature and VSWR, and improves the accuracy of the closed loop power control.
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