Inter‐digital coupled dual‐mode patch resonator with crossed‐island configuration for tri‐band filter design |
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| Authors: | Kuan‐Dih Yeh Meng‐Xi Wu Ji‐Chyun Liu Chin‐Yen Liu |
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| Affiliation: | 1. Department of Electrical Engineering, Chien Hsin University of Science and Technology, , Chung‐li, Tao‐yuan, 32097 Taiwan, Republic of China;2. Department of Electronics Engineering, Tahwa University of Science and Technology, Qionglin, , Hsinchu, 307 Taiwan, Republic of China |
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| Abstract: | The miniaturized dual‐mode tri‐band band‐pass filters (BPF) using crossed‐island patch resonator is proposed in this article. The BPF is mainly formed by a square patch resonator in which a crossed‐island configuration is embedded in the patch. The patch size reduction with 74.4% is achieved. By the perturbation and the alternative inter‐digital coupling, the tri‐band responses are obtained. The proposed filter covers the required bandwidths for WLAN band (2.26–3.11 GHz and 5.02–6.0 GHz) and X‐band (7.58–8.41 GHz) applications. Five transmission zeros are placed between three pass‐bands and resulted in a good isolation. © 2013 Wiley Periodicals, Inc. Int J RF and Microwave CAE 24:457–463, 2014. |
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| Keywords: | dual‐mode square patch crossed‐island |
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