Miniaturization microstrip rectangular-ring bandpass filter using high permittivity substrate

Cheng Hsing Hsu, Hong Tie Soong, Cheng Chi Yu, Cheng-Liang Huang, Ming Ta Kuo

Research output: Contribution to journalArticlepeer-review

5 Citations (Scopus)


A selective band-pass filter with a microstrip rectangular-ring resonator is proposed for wireless LANs such as the IEEE 802.11 systems (2.45 or 5.25 GHz). The miniaturized band-pass filter is implemented using a high-permittivity dielectric substrate. The full-wave simulator IE3D is used to design the single rectangular-ring resonator. The responses of the implemented filters using FR4 (εr = 4.7, tanδ = 0.016) and Sm(Co1/2, Ti 1/2)O3r = 25.5, tanδ = 0.00013) dielectric substrates are designed at dual-band frequencies of 2.45 and 5.25 GHz. Compact size and good agreement between the simulation and implementation results are obtained.

Original languageEnglish
Pages (from-to)540-543
Number of pages4
JournalMicrowave and Optical Technology Letters
Issue number3
Publication statusPublished - 2006 Mar 1

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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