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2010•Electromagnetic wavesOpen access

A HIGH BAND ISOLATION AND WIDE STOPBAND DIPLEXER USING DUAL-MODE STEPPED-IMPEDANCE RESONATORS

Chun-Yueh Huang, Min‐Hang Weng, Chang‐Sin Ye, Yong-Xiang Xu

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Abstract

In this paper, a high performance diplexer is designed and fabricated for Global Positioning System (GPS) and wireless local area network (WLAN) applications simultaneously.The diplexer mainly comprises two dual-mode ring bandpass filters (BPFs), operated at 1.575 GHz and 2.4 GHz, respectively.By using the stepped-impedance resonator (SIR) in the BPFs, the size reduction and wide stopband from 2.8 GHz to 6 GHz are obtained.Moreover, several transmission zeros are located at the passband edges, thus improving the passband selectivity.Due to impedance matching between two BPFs, a high

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What this paper is about

In this paper, a high performance diplexer is designed and fabricated for Global Positioning System (GPS) and wireless local area network (WLAN) applications simultaneously.The diplexer mainly comprises two dual-mode ring bandpass filters (BPFs), operated at 1.575 GHz and 2.4 GHz, respectively.By using the stepped-impedance resonator (SIR) in the BPFs, the size reduction and wide stopband from 2.8 GHz to 6 GHz are obtained.Moreover, several transmission zeros are located at the passband edges, thus improving the passband selectivity.Due to impedance matching between two BPFs, a high

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Available abstract

In this paper, a high performance diplexer is designed and fabricated for Global Positioning System (GPS) and wireless local area network (WLAN) applications simultaneously.The diplexer mainly comprises two dual-mode ring bandpass filters (BPFs), operated at 1.575 GHz and 2.4 GHz, respectively.By using the stepped-impedance resonator (SIR) in the BPFs, the size reduction and wide stopband from 2.8 GHz to 6 GHz are obtained.Moreover, several transmission zeros are located at the passband edges, thus improving the passband selectivity.Due to impedance matching between two BPFs, a high

Key concepts: Diplexer, Stopband, Resonator, Electrical impedance, Multi-band device, Materials science, Isolation (microbiology), Dual mode

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