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With the ongoing push for wireless systems to accommodate more users and support higher data rates more efficient modulation schemes have been created that are more advanced than simple FM and AM modulation used for radio broadcasting. These modulation schemes, such as orthogonal frequency division multiplexing (OFDM), suffer from high peak to average power ratios. Standard Class A and Class AB amplifiers cannot simultaneously achieve good linearity and efficiency, and therefore there has been an increase in the development of new topologies to combat this issue. Common features to these circuits is power combining of two or more separate transistors. In this work, we consider various ways of two-source power combining and identify four topologies of interest. We notice that linear power-efficient amplifiers reported to date are based upon two of the identified combining strategies. We believe that no amplifiers have been reported that leverage the other two alternatives. This work produces a fully-functional amplifier based on one of these alternatives. The prototypes are intended to serve as concept verification of the architecture and hence are implemented at lower (1 MHz) frequencies. v ACKNOWLEDGMENTS I would like to thank Dr. Vladimir Prodanov for providing the opportunity to work on this exciting and possibly very influential power combining technique. Professor Prodanov's ongoing support proved vital in completing this research successfully. I would also like to thank Dr. Tina Smilkstein and Dr. Dennis Derickson for being a part of my thesis committee, and providing the assistance needed to complete this program. Lastly, I would like to thank my father Rudi, my mother Lorena, and my brother Josh, for their support throughout the years. Without the ongoing support, emotionally and financially, none of this would have been possible.

AC Power Combining Strategy with Application to Efficient Linear Power Amplifiers