Research of Microwave Power Amplifiers and Switches
Date Issued
2006
Date
2006
Author(s)
Tsai, Zuo-Min
DOI
en-US
Abstract
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.
Subjects
功率放大器
微波切換器
迴授放大器
場效電晶體
共面波導
行波開關
步階阻抗低通濾波器
分段近似線段近
Power amplifier
micriwave switch
feedback amplifier
field effect transistors
traveling-wave switch
step impedance low-pass filters
piecewise linear approximation
Type
thesis
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