| Summary: | 博士 === 國立臺灣大學 === 電機工程學研究所 === 94 === This dissertation includes the researches of microwave power amplifiers and switches.
The theory and the design procedure of unilateralized feedback power amplifier is expanded from the conventional power amplifier design procedure. To realize the theory of the feedback power amplifier, new feedback topologies are proposed. The proposed feedback topology is equivalent to the conventional series and shunt dual loop feedback amplifier and good for heat sinking.
The FET-integrated CPW is proposed for the application of millimeter-wave traveling wave switches. The extraction of the model parameters is described. By modeling the 2-finger FET into CPW, the on-state millimeter-wave traveling wave switches are equivalent to the step impedance band pass filter and the design procedure is obtained. The frequency limitation of the traveling-wave switches is also discussed.
The concept of the filter integrated switch is illustrated. Based on this concept, the quarter-wavelength shorted stubs band pass filter are integrated into SPST and SPDT switch. The design parameters are systematically determined. Moreover, the power performance of the switch is described. The power performance of this circuit is predicted by the piecewise linear approximation and the linear network analysis. The method provides a easy way to predict the switch power performance.
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