Abstract
A highly integrated SiGe BiCMOS power amplifier for dual-band WLAN applications is presented. The PA has 2 and 3 stages of amplification for the 'b/g' and 'a' band, respectively, and integrates the input/output matching network, out-of-band rejection filter, power detector, and bias control. The die area is 1.7 × 1.6 mm <sup xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">2</sup> . The b/g amplifier achieves 28 dB gain with 19.5 dBm output power at 3% EVM and 185mA and harmonics of <;-45dBm/Mhz. The a-band amplifier achieves 30 dB gain with 3% EVM at 19.0 dBm output with 220mA of current and harmonics <; -50 dBm/MHz. The reported PA linearity, out-of-band rejection, and integration level exceeds previously reported WLAN dual-band SiGe PA designs.
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