A novel design methodology for transmission-line transformers
used in monolithic microwave integrated circuits (MMICs) is
presented in this thesis.The transformers are easy to be
implemented by metal-insulator-metal (MIM) process because they
need only two levels of metal interconnections. The S-parameters
of a1:4 impedance transformer and a differential balun have been
obtainedby field-theoretical means. These network models are
useful for synthesis of the transformers. The fitted lumped
equivalent circuit for the 1:4 impedance transformeris extracted
from the model. A low-pass filter example is designed by the
theoretical approach. Agreement is obtainedwhile comparing the
theoretical and experimental results. A novel monolithic
differential low noise amplifier usingall the transformers is
presented as the application.
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