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2010•Asia-Pacific Microwave ConferenceRequires access

A diplexer using modified stepped-impedance resonators

Ru‐Yuan Yang, Cheng‐Yuan Hung, Chin‐Min Hsiung, Chih-Chin Lin

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Abstract

We presented a high performance diplexer is designed and fabricated for Global System for mobile communications (GSM) applications in this paper,. Two square open-ring bandpass filters (BPFs), operated at 0.9 GHz and 1.8 GHz, and are used for the diplexer mainly. The size reduction, the deep and wide stop-band from 0.51 GHz to 4.9 GHz can be obtained when modifying the stepped-impedance resonator (SIR) in the BPFs, The improved passband selectivity is obtained since several transmission zeros are located at the passband edges The simulated and measured results have a good agreement with the proposed design concept.

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What this paper is about

We presented a high performance diplexer is designed and fabricated for Global System for mobile communications (GSM) applications in this paper,. Two square open-ring bandpass filters (BPFs), operated at 0.9 GHz and 1.8 GHz, and are used for the diplexer mainly. The size reduction, the deep and wide stop-band from 0.51 GHz to 4.9 GHz can be obtained when modifying the stepped-impedance resonator (SIR) in the BPFs, The improved passband selectivity is obtained since several transmission zeros are located at the passband edges The simulated and measured results have a good agreement with the proposed design concept.

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Available abstract

We presented a high performance diplexer is designed and fabricated for Global System for mobile communications (GSM) applications in this paper,. Two square open-ring bandpass filters (BPFs), operated at 0.9 GHz and 1.8 GHz, and are used for the diplexer mainly. The size reduction, the deep and wide stop-band from 0.51 GHz to 4.9 GHz can be obtained when modifying the stepped-impedance resonator (SIR) in the BPFs, The improved passband selectivity is obtained since several transmission zeros are located at the passband edges The simulated and measured results have a good agreement with the proposed design concept.

Key concepts: Diplexer, Passband, Resonator, Band-pass filter, GSM, Electrical impedance, Electronic engineering, Materials science

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