Compact microstrip stepped impedance wideband bandpass filter |
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Authors: | Lin Li Zheng-Fan Li H-X Xia J-X Yang |
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Affiliation: | 1. Faculty of Informatics and Electronics , Zhejiang Sci-Tech University , Hangzhou 310018, China lilin_door@hotmail.com;3. Department of Electronic Engineering , Shanghai Jiao Tong University , Shanghai, 200240, China;4. Faculty of Informatics and Electronics , Zhejiang Sci-Tech University , Hangzhou 310018, China |
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Abstract: | A novel wideband bandpass filter with a very compact size is presented in this article. Using a side-coupled stepped impedance resonator, wideband characteristics with adjustable centre frequency and 3-dB fractional bandwidth can be obtained easily. Finally, a filter sample is designed and fabricated to provide an experimental verification on the proposed topology. Good insertion/return losses, flat group delay, wide bandwidth as well as ultra compact size are achieved as demonstrated in both simulation and experiment, which makes this filter a very promising candidate for applications in future wideband communication system. |
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Keywords: | wideband bandpass filter stepped impedance resonator centre frequency 3-dB fractional bandwidth |
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