doherty PA采用Doherty结构的功率放大器设计 Advanced Power Amplifier Design Using Doherty Configurations Authored by: Sean Kim, PhD. Charly Jeung, Ph.D. Peter Shin Ansoft Corporation Outline Introduction Motorola MET Model Design Kit in Ansoft Designer Model consideration and validation Matching Techniques for Power Amplifier Design Load-pull analysis Lowpass multi section, transmission line, and low Q matching technique Doherty Amplifier Design Doherty amplifier overview Carrier amplifier design Peak amplifier design 90 hybrid coupler, offset line, and impedance transformer design Balanced Amplifier Design Doherty and Balanced Amplifier Comparison Conclusion References Introduction Why a power amplifier is important? Power amplifier is a key element to build a wireless communica……