ISSCC 2014
Session 3
RF & Wireless
Polar Antenna Impedance Detection and Tuning for Efficiency Improvement in a 3G/4G CMOS Power Amplifier
efficiency and achieve a long battery life. Therefore, both the peak efficiency and the efficiency loss due to antenna impedance mismatch or power back-off are highly critical design issues. In particular, the challenge
ISSCC 2012
Session 4
RF & Wireless
A 28.3mW PA-Closed Loop for Linearity and Efficiency Improvement Integrated in a +27.1dBm WCDMA CMOS Power Amplifier
The main challenge is to improve its power efficiency. Although many linearization and efficiency improvement techniques have been proposed, most of these techniques are based on feed-forward, which may not be effective