A miniaturized dual-band bandpass filter using embedded resonators

Cheng Ying Hsu, Chu Yu Chen, Huey Ru Chuang

Research output: Contribution to journalArticle

23 Citations (Scopus)

Abstract

A compact microstrip dual-band bandpass filter (BPF) using the embedded open-loop ring resonator is proposed. The filter can achieve two passbands without using the external dual-band impedance transformer in the input/output feeding line. Furthermore, by using the developed design method, the ratio of the first passband to the second passband can be controlled. A compact microstrip dual-band BPF operated at 2.45/5.7 GHz is demonstrated. The designed filter has low insertion loss, high rejection between the two passbands, and a very small size of 11.5 × 4.65 $ mm 2 (0.094λ 0 × 0.039 λ 0), λ 0 being the free-space wavelength of the center operating frequency of the 2.45 GHz. The good agreement between simulation and measurement is obtained.

Original languageEnglish
Article number6074966
Pages (from-to)658-660
Number of pages3
JournalIEEE Microwave and Wireless Components Letters
Volume21
Issue number12
DOIs
Publication statusPublished - 2011 Dec 1

All Science Journal Classification (ASJC) codes

  • Condensed Matter Physics
  • Electrical and Electronic Engineering

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