Abstract:
This article presents an adaptive predistortion (APD) linearization
technique to improve the linearity of millimeter-wave power
amplifiers (PAs), specifically at 60 GHz. The PA and the APD were
designed using the 0.13 mm SiGe BiCMOS process. The predistortion is
applied to the PA by varying the gain of the PA through its variable
gain amplifier. The PA achieves a PSAT of 11.97 dBm and IP1 dB of
210 dBm. After linearization the PA has an improved IP1 dB of 26
dBm. This linearization technique results in an optimum intermodulation
distortion 3rd reduction of 10 dB.
