A low-cost-packaged 4.9-6 GHz LNA for WLAN applications

A two stage fully integrated low-noise amplifier has been developed for 4.9-6 GHz WLAN applications. This circuit was realized in a 0.35 /spl mu/m SiGe BiCMOS process and packaged in a low cost plastic VFQFPN package. The circuit operates over a wide band (4.9-6 GHz) and draws 13.2 mA from 2.0 V supply. It exhibits a noise figure of 3.9 dB and a gain of 18.7 dB at 5.5 GHz. The measured IIP1 and IIP3 are respectively -13.9 dBm and -3.5 dBm at 5.5 GHz. The input and output return losses are lower than -10 dB and the gain ripple is less than 1.5 dB over all the frequency bandwidth.

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