電阻電感及電容之表面黏著元件量測及等效電路模型萃取

Model Extraction and Measurements of SMD Resistors, Inductors and Capacitors

李偉強(We-Chiang Li)

指導教授 ： 瞿大雄

國立臺灣大學/電機資訊學院/電信工程學研究所/碩士(2006年)

https://doi.org/10.6342/NTU.2006.00954

摘要

本論文主要在研究電阻、電感及電容表面黏著元件，於射頻頻段之本質特性
及非本質特性。表面黏著元件之本質特性，通常可由阻抗分析儀或電阻電感電容
（LCR）儀表量測，阻抗分析儀主要在量測元件上通過之電壓及電流比值，即為
元件阻抗。一般可由儀器內建之等效電路功能，萃取元件模型值。對於相同大小
值之電阻、電感及電容元件，本質特性可能會隨著不同的電阻、電感及電容製程
而改變，此時，若直接使用阻抗分析儀內建之等效電路，可能造成模型上的誤差。
此外，由於表面黏著元件自身的寄生效應，故量測到之阻抗值通常可分為實部及
虛部。因此，若能夠了解元件的結構，再利用量測到之阻抗實部及虛部，將可更
有效地進行模型建立及模型值的萃取。
此外，由於電阻、電感及電容表面黏著元件，通常會應用在射頻電路中，元
件的本質特性，會受到外在環境的影響而有所改變，此即元件的非本質特性。此
時，若僅使用元件的本質特性模型，將可能造成電路設計的失誤，及操作上必要
的調整。故若能清楚地了解元件之本質特性及非本質特性，進而分析及萃取模型
上的各元件值，對於在射頻電路設計，將可避免由元件模型的不準確及誤差，造
成電路效能上的錯誤。
最後，本論文將利用建立之電阻、電感及電容表面黏著元件之非本質特性模
型，設計一寬頻等化器電路，做為模型驗證。

關鍵字

表面黏著元件 ； 電阻電感及電容 ； 等效電路模型萃取

並列摘要

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.

並列關鍵字

SMD ； Resistors, Inductors and Capacitors ； Model Extraction

參考文獻

[1] R. J. Weber, Introduction to Microwave Circuits – Radio Frequency and Design

Applications, IEEE Press, 2001。

Surface-Mounted RF Components,” IEEE Trans. Microwave Theory Tech., vol.

[3] K. Naishadham, “Experimental Equivalent-Circuit Modeling of SMD Inductors

for Printed Circuit Application,” IEEE Trans. Microwave Theory Tech., vol. 43,