Design optimization and implementation of bandpass filters with normally fed microstrip resonators loaded by high-permittivity dielectric

被引：25

作者：

Hennings, A ^{[1
]}

Semouchkina, E

Baker, A

Semouchkin, G

机构：

[1] Tech Univ Rheinisch Westfael Tech Hochsch, Inst Werkstoffe & Elektrotech, D-52074 Aachen, Germany

[2] Penn State Univ, Mat Res Inst, University Pk, PA 16802 USA

来源：

IEEE TRANSACTIONS ON MICROWAVE THEORY AND TECHNIQUES | 2006年 / 54卷 / 03期

基金：

美国国家科学基金会;

关键词：

finite-difference time-domain method (FDTD); low-temperature co-fired ceramic (LTCC); microstrip filters; resonance; transmission zeroes;

D O I：

10.1109/TMTT.2006.869709

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

Different approaches for designing bandpass filters with transmission zeroes are investigated by using the transmission-line theory and the finite-difference time-domain method. The filters are composed of capacitively coupled uniform impedance microstrip resonators, stepped-impedance microstrip resonators, and tapped feed lines. Different design modifications are discussed and, as a result, a design with double-coupled resonators is proposed. Based on this structure, a miniaturized filter capacitively loaded by high-permittivity dielectric inclusions and fabricated by using low-temperature co-fired ceramic (LTCC) technology is presented. The measured and simulated S-parameter spectra of the LTCC-filter are in good agreement.

引用

页码：1253 / 1261

页数：9