Compact wideband bandpass filter |
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| Authors: | Mandal M.K. Sanyal S. |
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| Affiliation: | Electron. & Electr. Commun. Eng. Dept., Indian Inst. of Technol., Kharagpur, India; |
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| Abstract: | Designing wideband bandpass filters (BPF) with parallel-coupled microstrip lines requires tight coupling resulting in close separation between the lines and difficulty of fabrication. Here, it is shown that the etched slots in the ground plane of the parallel coupled lines can significantly increase the coupling. This technique has been extended to realize ultra-wideband BPFs having 3-dB fractional bandwidth greater than 100% and low insertion loss in the passband. |
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