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Multi‐band reconfigurable microwave filter using dual concentric resonators |
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| Authors: | Saffrine Kingsly Malathi Kanagasabai Gulam Nabi Alsath Mohammed Sangeetha Subbaraj Yogeshwari Panneer Selvam Rajesh Natarajan |
| Affiliation: | 1. Department of Electronics and Communication Engineering, College of Engineering, Guindy Campus, Anna University, Chennai, India;2. Department of Electronics and Communication Engineering, Sri Sivasubramaniya Nadar College of Engineering, Chennai, India;3. Department of Electronics and Communication Engineering, Valliammai Engineering College, Chennai, India |
| Abstract: | This article presents the design and testing of a novel frequency reconfigurable microwave filter. The filter structure is composed of an all stop resonator coupled with C‐ and E‐shaped parasitic resonators. PIN diodes are located at suitable positions to achieve multi‐band reconfiguration from 1.2 to 3.2 GHz making the filter suitable for multiple wireless communication systems. The frequency and bandwidth of the filter are governed by the length of the resonators and coupling between the resonators and the transmission line, respectively. A sharp rejection of ?30 dB is observed between the passbands. The proposed filter offers 56% size reduction with flat group delay performance. The prototype filter is fabricated and the simulation results are validated using experimental measurements. The measurement results show good agreement with the simulation results. |
| Keywords: | filter multi‐band reconfiguration technique |