Feedback Amplifiers

Improving the performance of the power amplifier is the most pressing problem facing designers of modern radio-frequency (RF) transceivers. Linearity and power efficiency of the transmit path are of utmost importance, and the power amplifier has proven to be the bottleneck for both. High linearity enables transmission at the highest data rates for a given channel bandwidth, and power efficiency prolongs battery lifetime in portable units and reduces heat dissipation in high-power transmitters. Cartesian feedback is a power amplifier linearization technique that acts to soften the tradeoff between power efficiency and linearity in power amplifiers. Despite its compelling, fundamental advantages, the technique has not enjoyed widespread acceptance beca...

Broadband microwave amplifiers are essential components for boosting signals in a wide range of technology, from telecommunications equipment to radar and electronic warfare systems. This book provides professionals with a complete understanding of state-of-the art and cutting-edge techniques for designing and fabricating broadband amplifiers. It covers the entire design life cycle, detailing each stage in a practical, hands-on manner. The book explains measurement, modeling, and testing methods so engineers can optimize designs to achieve maximum signal amplification. Filled with case studies, this book thoroughly explores the application of broadband microwave amplifiers in optical communications, satellite communications, wireless local area netwo...

This is the first book devoted exclusively to the outphasing power amplifier, covering the most recent research results on important aspects in practical design and applications. A compilation of all the proposed outphasing approaches, this is an important resource for engineers designing base station and mobile handset amplifiers, engineering managers and program managers supervising power amplifier designs, and R&D personnel in industry. The work enables you to: design microwave power amplifiers with higher efficiency and improved linearity at a lower cost; understand linearity and performance tradeoffs in microwave power amplifiers; and understand the effect of new modulation techniques on microwave power amplifiers....