Wide-stopband microstrip low-pass filter using modified semi-circle patch resonator |
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Authors: | Mohsen Hayati Akram Sheikhi Auob Adineh Vand |
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Affiliation: | 1. Department of Electrical Engineering, Faculty of Engineering , Razi University , Kermanshah , Iran mohsen_hayati@yahoo.com;3. Department of Electrical Engineering, Faculty of Engineering , Razi University , Kermanshah , Iran;4. Department of Electrical Engineering , Kermanshah Branch, Islamic Azad University , Kermanshah , Iran |
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Abstract: | In this article, a compact microstrip low-pass filter with elliptic-function response is proposed. To achieve wide stopband, modified semi-circle patch resonator in series with semi-circle stepped impedance resonator is used. The proposed structure achieves a wide stopband and a high selectivity within a small circuit area. The proposed filter has 3-dB cutoff frequency at 1.71?GHz and 20?dB rejection at 2.1?GHz. The stopband with the attenuation level better than ?18.7?dB is from 2.08 up to 16?GHz, and consequently we have reached the high and wide rejection in stopband as well as compact size. The structure is simulated, fabricated and measured. The measured results are in good agreement with the simulated results. |
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Keywords: | microstrip low-pass filter interdigital structure patch resonator and wide stopband |
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