A COMPACT CASCADE QUADRUPLET BANDPASS FILTER WITH LOW TEMPERATURE COFIRED CERAMIC TECHNOLOGY

Abstract

In this article, a compact cascade quadruplet bandpass filter has been proposed. This bandpass filter has been realized with the semilumped method and can generate a pair of transmission zeros at the two sides of passband by using the nonadjacent cross coupling. The analysis and design procedures are provided in this article. To miniaturize the size of the circuit and improve its performance, multilayered structure and the low-temperature cofired ceramic technology are employed to design and fabricate the filter. Measurement results agree well with the electromagnetic simulation, which can validate the proposed structure. (c) 2008 Wiley Periodicals, Inc. Microwave Opt Technol Lett 50: 3218-3220, 2008; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.23910