Wideband Class-B Power Amplifiers

摘要: Vanwege vertrouwelijke informatie of andere redenen is slechts een deel van de publicatie opgenomen in repository. Due to confidential information or other reasons only a part the publication presented Wideband Class-B power amplifier required Modern communication systems. The bandwidth limitation Power generally caused by narrow band 2nd harmonic short. In this thesis methods manipulation are discussed. beginning, current and voltage waveforms at output analyzed, series load configurations which can give good performance given. single-ended topology traditional short networks limited interaction between fundamental impedance networks. Introducing varactors into extended. Performance commercial varactor restricted breakdown package parasitic. A 32% relative realized with 90 V break down from Aeroflex central frequency 1 GHz, drain efficiency above 65% over band. differential signal isolated, provides convenience for wideband design. practical design non-idea transformer matching, compensation capacitors primary transformer. low condition, be extended using coupling inductors. Two loops structure applied case. high design, shorted though large capacitors. One loop condition. simulation result these structures provide 50% 70% bandwidth, indicates their potential