| Summary: | 碩士 === 國立臺灣大學 === 電信工程學研究所 === 94 === In this thesis, we focus on the study of intrinsic characteristics and extrinsic
characteristics of surface mounted devices (SMDs) including resistors, inductors, and
capacitors in the radio frequency RF range.
The intrinsic characteristics of SMD can be measured by the impedance analyzer
or LCR meter, and extracted by using the equivalent circuit models provided by the
instrument internal software. For the same values of components but in different kinds
of processes, the intrinsic characteristics may vary with these processes. At this time,
if the equivalent circuit models provided with the instrument internal software are
directly used by the designer, the equivalent models may become inaccurate.
The impedance, or the ratio of voltage and current passing through the SMD, is
measured by the impedance analyzer. Because of the parasitic effects in SMD, the
impedance should be expressed into real and imaginary parts in order to analyze the
SMD effectively. Therefore, if one could understand the physical structure of SMD
clearly, we will effectively develop the model and extract the values of model
elements correctly.
In addition, due to the application of SMD in RF circuits, the intrinsic
characteristics of SMD vary with the environment. The application of SMD in circuits
means the involvement of the extrinsic characteristics of SMDs. Now, if the circuits
are designed in accordance with the SMD intrinsic characteristics, the errors may
occur in circuit design and cause inevitable later tuning work. As a result, if one could
fully characterize the intrinsic and extrinsic characteristics of SMD, we can avoid the
inaccuracy and errors in the models for RF circuit designs.
Finally, in this thesis we design a broadband equalizer using the developed SMD models of extrinsic characteristics for model verification.
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