Quasi-elliptic function filters with a dual-passband response with high-permittivity ceramics substrate

Cheng Liang Huang, Yuan Bin Chen, Meng Lin Lee

Research output: Contribution to journalArticlepeer-review

2 Citations (Scopus)


The miniaturization of dual-passband filters by employing two high-permittivity ceramic substrates (with respective dielectric constants of 4.5 and 20.8) are investigated. Microwave dielectric ceramics with high permittivity are commonly applied in several microwave communication components. With the advantages of compact size, high-permittivity ceramics can be used as the substrate for dual-passband filters. Moreover, the fundamental characteristics of newly developed compact stepped impedance resonator (SIR) have also been described and applied to the design of band-pass filters. In this article, the designed ring resonators structures are simulated using an IE3D simulator. The responses of the fabricated dual-passband filters using FR4 (εr = 4.5, Q × f= 350,000 GHz) and 0.96 Mg 0.95CoTiO3-0.04SrTiO3 with 1 wt% ZnO addition (εr = 20.8, Q × f= 74,000 GHz) ceramic substrates are designed at the center frequency of 2.4/5.2 GHz. This compact size, low loss dual-passband filter should be useful in many wireless communication systems.

Original languageEnglish
Pages (from-to)245-248
Number of pages4
JournalMicrowave and Optical Technology Letters
Issue number1
Publication statusPublished - 2009 Jan

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Atomic and Molecular Physics, and Optics
  • Condensed Matter Physics
  • Electrical and Electronic Engineering

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