An Excellent Gain Flatness 3.0-7.0 GHz CMOS PA for UWB Applications

作者：Murad S A Z^*; Pokharel R K; Galal A I A; Sapawi R; Kanaya H; Yoshida K

来源：IEEE Microwave and Wireless Components Letters, 2010, 20(9): 510-512.

DOI：10.1109/LMWC.2010.2052593

• Cascode
• current-reused
• phase linearity
• power amplifier (PA)
• ultra-wideband (UWB)

This letter presents an excellent gain flatness CMOS power amplifier (PA) for UWB applications at 3.0-7.0 GHz in TSMC 0.18 mu m CMOS technology. The UWB PA proposed here employs a current-reused technique to enhance the gain at the upper end of the desired band, a shunt and a series peaking inductors with a resistive feedback at the second stage to obtain the wider and flat gain, while shunt-shunt feedback helps to enhance the bandwidth and improve the output wideband matching. The measurement results indicated that the input return loss (S(11)) less than -6 dB, output return loss (S(22)) less than -7 dB, and excellent gain flatness approximately 14.5 +/- 0.5 dB over the frequency range of interest. The output 1 dB compression of 7 dBm, the output third-order intercept point (OIP3) of 18 dBm, and a phase linearity property (group delay) of +/- 178.5 ps across the whole band were obtained with a power consumption of 24 mW.

• 出版日期2010-9