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Published in:
2023 | OriginalPaper | Chapter
A Switchable Bandpass Filter for Multiple Passband and Stopband Applications
Authors : Anjan Bandyopadhyay, Pankaj Sarkar, Rowdra Ghatak
Published in: Proceedings of International Conference on Frontiers in Computing and Systems
Publisher: Springer Nature Singapore
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Abstract
A four-state switchable microstrip filter is presented in this article. A pair of 0° fed uniform impedance resonators coupled with a pair of uniform impedance resonators are used to produce dual passband response at 2.4 GHz and 3.5 GHz, respectively. Four pin diodes are employed to switch the dual passband response to two single passband responses and one all stop response. Four transmission zeroes are observed at 2.1 GHz, 2.68 GHz, 3.26 GHz, 3.61 GHz, respectively, that help to get better selectivity and adjacent passbands isolation. In all switchable states, the filter shows an upper stopband response up to 6.0 GHz. The design layout is very compact in size of 0.21 × 0.25 λg at 2.4 GHz.