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PIER PIER B PIER C PIER M PIER Letters
2011-05-09
Balanced Single- and Dual-Band BPFs Using Ring Resonators
By
Ching-Her Lee,

    Dr. Ching-Her Lee

    Graduate Institute of Communications Engineering and Department of Electronic

    National Changhua University of Education

    Taiwan

    Homepage

Chung-I Hsu,

    Dr. Chung-I Hsu

    Department of Electrical Engineering

    National Yunlin University of Science and Technology

    Taiwan

    Homepage

Hsun-Hsiang Chen,

    Dr. Hsun-Hsiang Chen

    Department of Electronic Engineering

    National Changhua University of Education

    Taiwan

    Homepage

Yu-Sen Lin

    Dr. Yu-Sen Lin

    Department of Electronic Engineering

    National Changhua University of Education

    Taiwan, R.O.C.

    Homepage

Progress In Electromagnetics Research, Vol. 116, 333-346, 2011
doi:10.2528/PIER11033016
Abstract
This paper presents new balanced single- and dual-band bandpass filters (BPFs), both of which are constructed using two ring resonators. For each BPF, opencircuited stubs are added to one of the two resonators so that the transmitted common-mode (CM) signals can be attenuated, and source-load coupling is established so that two transmission zeros are generated near the edges of each desired differential-mode (DM) passband to sharpen the passband selectivity. The measurement agrees well with the simulation. For the single-band BPF, the measured minimum DM insertion loss is 1.4 dB in the DM passband, in which the CM suppression is larger than 41.6 dB. For the dual-band BPF, the minimum DM insertion losses are 1 and 1.35 dB in the first and second passbands, respectively, in which the CM rejections are larger than 29 and 22 dB.
Citation
Ching-Her Lee, Chung-I Hsu, Hsun-Hsiang Chen, and Yu-Sen Lin, "Balanced Single- and Dual-Band BPFs Using Ring Resonators," Progress In Electromagnetics Research, Vol. 116, 333-346, 2011.
doi:10.2528/PIER11033016
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