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Active and Passive Electronic Components
Volume 2008, Article ID 537069, 8 pages
Research Article

Modeling and Measurements of Novel Monolithic Filters

1Department of Electrical Engineering, Arizona State University, Tempe, AZ 85287-7206, USA
2Department of Electrical Engineering and Communications, University of Duisburg-Essen, Campus Duisburg, 47057 Duisburg, Germany

Received 27 December 2007; Accepted 24 June 2008

Academic Editor: T. Kalkur

Copyright © 2008 Aly H. Aly et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


This paper presents novel multilayer tuneable high -filters based on hairpin resonators including ferroelectric materials. This configuration allows the miniaturization of these filters to a size that makes them suitable for chip and package integration and narrow-band applications. The main focus was miniaturizing filters with coupled loops using multilayer dielectric substrates. A further goal was to increase the quality factor of these distributed filters by embedding high dielectric materials in a multilayer high- and low- (dielectric constant) substrate that is supported by LTCC technology. An improved W-shape bandpass filter was proposed with a wide stopband and approximately 5% bandwidth.