A miniaturized dual-band bandpass filter using embedded resonators

Cheng Ying Hsu; Chu Yu Chen; Huey Ru Chuang

doi:10.1109/LMWC.2011.2172592

A miniaturized dual-band bandpass filter using embedded resonators

Cheng Ying Hsu, Chu Yu Chen, Huey Ru Chuang

Institute of Computer and Communication Engineering

Research output: Contribution to journal › Article › peer-review

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 language	English
Article number	6074966
Pages (from-to)	658-660
Number of pages	3
Journal	IEEE Microwave and Wireless Components Letters
Volume	21
Issue number	12
DOIs	https://doi.org/10.1109/LMWC.2011.2172592
Publication status	Published - 2011 Dec

All Science Journal Classification (ASJC) codes

Condensed Matter Physics
Electrical and Electronic Engineering

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title = "A miniaturized dual-band bandpass filter using embedded resonators",

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.",

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