Meeting Banner
Abstract #0546

Large-Signal Characterization of Coupled RF Amplifiers for Parallel Transmit

Michael Twieg 1 and Mark A Griswold 1,2

1 Dept. of Electrical Engineering and Computer Science, Case Western Reserve University, Cleveland, OH, United States, 2 Dept. of Radiology, Case Western Reserve University, Cleveland, OH, United States

We present a fast and powerful method of experimentally quantifying the effective open loop output impedance and power efficiency of coupled power amplifier topologies across their full control space. We demonstrate the use of the method for characterizing a Current Mode Class D (CMCD) amplifier at 10 MHz. The results demonstrate some of the unique qualities associated with switch mode power amplifiers, such as the complex nature of their effective output impedance, and the ability to recover, rather than dissipate, power coupled from other transmit elements. This methodology greatly facilitates the evaluation of amplifiers for parallel transmit applications.

This abstract and the presentation materials are available to members only; a login is required.

Join Here