文档介绍：國立成功大學電機工程學系
博士論文
微波介電共振器及微波濾波器之研究
Study of Microwave Dielectric Resonators
and Microwave Filters
研究生: 陳耀忠 Student: Yao-Chung Cheng
指導教授: 黃正亮 Advisor: Cheng-Liang Huang
Department of Electrical Engineering
National Cheng Kung University
Tainan, Taiwan, .
Dissertation for Doctor of Philosophy
June, 2002
中華民國九十一年六月
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Study of Microwave Dielectric Resonators and Filters
Student: Yao-Chung Chen Advisor: Cheng-Liang Huang
Department of Electrical Engineering
National Cheng-Kung University
Abstract
Due to the development in munication, mobile telephone systems, as well
as in satellite broadcasting systems was rapidly, how to design the high-quality devices applied
in analog circuit is the most important homework. There are two primary branches in this
research. One part is to develop the dielectric ceramic systems that exhibit great dielectric
properties. The other part is to design and realize the coaxial-type dielectric filters.
and fabrications of microwave dielectric resonators
(a) The effect of CuO, ZnO and V2O5 additions to ReAlO 3 (Re=Sm and Nd) were
investigated. The sintering temperatures of ReAlO 3 ceramics can be effectively reduced from
1650℃ to 1410~1430℃ due to the liquid-phase sintering effect. At low concentration levels
(- wt%), the ReAlO 3 ceramics remained in the single phase and presented second phase
Sm4Al2O9 and Nd4Al2O9 on SmAlO 3 and NdAlO 3, respectively with concentrations over
wt%. The Q×f values of 51000 and 41000 GHz was obtained at 1430℃ for wt% CuO and
I
ZnO-sintered SmAlO 3 ceramics. The Q×f value of 63000 GHz was achieved at 1410~1430℃for
wt% CuO-sintered NdAlO 3. The relative dielectric constant of ReAlO 3 remains in the range
from to . The temperature coefficient of ReAlO 3 ceramics depends on the additions and
ranges from –30 to -65 ppm/℃.