Title

High-Q Resonators And Filters Inside Advanced Low-Temperature Co-Fired Ceramic Substrates Using Fine-Scale Periodicity

Keywords

Bandpass filters; Cavity resonator filters; Low-temperature co-fired ceramic (LTCC); Metamaterial

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. © 2006 IEEE.

Publication Date

4-1-2008

Publication Title

IEEE Transactions on Microwave Theory and Techniques

Volume

56

Issue

4

Number of Pages

922-930

Document Type

Article

Personal Identifier

scopus

DOI Link

https://doi.org/10.1109/TMTT.2008.919375

Socpus ID

41949086983 (Scopus)

Source API URL

https://api.elsevier.com/content/abstract/scopus_id/41949086983

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