Researchers in the UCLA Department of Electrical Engineering have created a hybrid digital polar and zero switching voltage (ZVS) contour power amplifier, offering higher efficiency for up to 36 dB peak-to-average ratio.
Traditional power amplifiers are biased in order to maximize their efficiency at a given operating power. However, this makes them less efficient at lower power levels.Both high and low power levels can be important in wireless communications, where a large peak to average power ratio is common.Other hybrid approaches are theoretically efficient in their given power regimes, but high bandwidth modulations can suffer from supply regulator inefficiency.
Researchers in UCLA’s Department of Electrical Engineering have built upon recent power amplifier innovations to create a hybrid digital polar and zero switching voltage (ZVS) contour power amplifier. This hybrid system has the potential to double the efficiency of traditional RF transmitters, making it ideal for use in wideband digital communications.The contour amplifier allows for high efficiency below the 10 dB back-off, while the digital polar amplifier can easily attain up to 36 dB peak-to-average ratio (PAR).
Power amplifiers in wireless communications like WLAN, LTE, and WIMAX
Researchers at UCLA’s department of Electrical Engineering are currently developing a proof-of-concept CMOS chip based on 130 nm CMOS architecture in order to validate their detailed simulations and theoretical foundations for this technology.
|United States Of America||Issued Patent||9071204||06/30/2015||2012-107|
Peak-to-average power ratio, power amplifier (PA), zero voltage switching (ZVS), hybrid power amplifier, wireless communications