Multi‐band reconfigurable microwave filter using dual concentric resonators. Issue 6 (22nd March 2018)

• Record Type: Journal Article
• Authors: Kingsly, Saffrine; Kanagasabai, Malathi; Mohammed, Gulam Nabi Alsath; Subbaraj, Sangeetha; Panneer Selvam, Yogeshwari; Natarajan, Rajesh
• Is Part Of: International journal of RF and microwave computer-aided engineering. Volume 28:Issue 6(2018)
• Page Start: n/a
• Page End: n/a
• Publication Date: 2018-03-22
• Subjects: filter -- multi‐band -- reconfiguration technique; Microwave devices -- Computer-aided design -- Periodicals; Computer-aided engineering -- Periodicals; 621.3813
• DOI: 10.1002/mmce.21290
• Languages: English
• ISSNs: 1096-4290

Abstract

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.