Title

High-q resonators and filters inside advanced low-temperature co-fired ceramic substrates using fine-scale periodicity

Authors

Authors

X. Gong; T. Smyth; E. Ghaneie;W. J. Chappell

Comments

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Abbreviated Journal Title

IEEE Trans. Microw. Theory Tech.

Keywords

bandpass filters; cavity resonator filters; low-temperature co-fired; ceramic (LTCC); metamaterial; ANTENNAS; Engineering, Electrical & Electronic

Abstract

Effective media are shown to be created by patterning a material to overcome inherent material losses. Two different types of effective media, i.e., the windowpane and stratified media formed by fine-scale periodicity, are investigated. The effect of different perforations in the material is demonstrated. In particular, a great reduction in dielectric loss is observed in the stratified medium, making high-Q resonators and filters possible out of relatively lossy materials. Low-temperature co-fired ceramic (LTCC) fabrication can form advanced metamaterial substrates by realizing these two layer-by-layer effective media. High-Q (unloaded quality factors up to 762) resonators are demonstrated using the stratified medium concept, which reduces the dielectric loss by roughly 50%. Two-pole filters at K-band are measured to have insertions losses as low as 0.47 dB with 8.5% bandwidth. The demonstrated unloaded Q factor is much larger than that of a homogenous LTCC resonator, which is limited to an unloaded Q factor of approximately 400.

Journal Title

Ieee Transactions on Microwave Theory and Techniques

Volume

56

Issue/Number

4

Publication Date

1-1-2008

Document Type

Article

Language

English

First Page

922

Last Page

930

WOS Identifier

WOS:000254937200020

ISSN

0018-9480

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