Design of the Fractal-Based Dual-Mode Bandpass Filter on Ultra Thin Liquid-Crystal-Polymer Substrate

W.-Y. Chen Institute of Microelectronics and Department of Electrical Engineering, Advanced Optoelectronic Technology Center, Center for Micro/Nano Science and Technology, National Cheng Kung University, No. 1, University Rd., East District, Tainan City 701, Taiwan

S.-J. Chang Institute of Microelectronics and Department of Electrical Engineering, Advanced Optoelectronic Technology Center, Center for Micro/Nano Science and Technology, National Cheng Kung University, No. 1, University Rd., East District, Tainan City 701, Taiwan

M.-H. Weng Medical Devices and Opto-Electronics Equipment Department, Metal Industries Research & Development Center, 3F, No. 88, Luke 5th Rd., Lujhu Township, Kaoshiung 82151, Taiwan

C.-Y. Hung Department of Electronics Engineering and Computer Sciences, Tung-Fang Institute of Technology, No. 110, Tung-Fung Road, Hunei Shiang, Kaohsiung County 829, Taiwan

Abstract

In this paper, a novel miniature dual-mode bandpass filter based on modified Sierpinski fractal is proposed and realized on the ultra thin (100 μm) flexible liquid-crystal-polymer (LCP) substrate for wireless local area network (WLAN) IEEE 802.11a. The subwavelength property which leads to the miniature characteristic is investigated in this paper. We adopt the 3rd order Sierpinski geometry as the mainly dual-mode resonator to form a dual-mode filter. The measured result is in good agreement with the full-wave simulation result.

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Design of the Fractal-Based Dual-Mode Bandpass Filter on Ultra Thin Liquid-Crystal-Polymer Substrate

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Design of the Fractal-Based Dual-Mode Bandpass Filter on Ultra Thin Liquid-Crystal-Polymer Substrate

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