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

    Authors

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

    Comments

    Authors: contact us about adding a copy of your work at STARS@ucf.edu

    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

    Share

    COinS