Title :
Employing Open/Short Via-Hole to Control the Coupling Coefficient for LTCC Bandpass Filters
Author :
Tang, Ching-Wen ; Shen, Che-Wei
Author_Institution :
Dept. of Commun. Eng., Nat. Chung Cheng Univ., Chiayi
Abstract :
In this letter, the multilayered bandpass filter (BPF) is synthesized with the assistance of via-holes. By controlling the coupling coefficient with open or short via-hole, the transmission zero can be shifted to lower or higher passband skirt. Theoretical analysis and design procedures are provided. The prototypical low-temperature co-fired ceramic BPFs are fabricated and measured as well. In addition, comparisons of simulated results and experimental data are shown. Good match validates the proposed filter.
Keywords :
band-pass filters; ceramic packaging; LTCC multilayered bandpass filters; coupling coefficient; passband skirt; prototypical low-temperature co-fired ceramic BPFs; via-holes; Band pass filters; Capacitors; Ceramics; Circuit synthesis; Couplings; Filtering theory; Frequency; Inductors; Microwave filters; Passband; Bandpass filter (BPF); low-temperature co-fired ceramic (LTCC);
Journal_Title :
Microwave and Wireless Components Letters, IEEE
DOI :
10.1109/LMWC.2008.2007695
