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Design of Coplanar Stripline Bandpass Filter with Re-configurable Filter Switch
  • Banani Basu,
  • Edison Kho,
  • Arnab Nandi
Banani Basu
National Institute of Technology Silchar

Corresponding Author:[email protected]

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Edison Kho
National Institute of Technology Silchar
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Arnab Nandi
National Institute of Technology Silchar
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Abstract

This paper has designed a bandpass filter using a coplanar stripline stub (CPS) resonator consisting of open and short-ended strip lines connected to the PIN Diode switches. The use of spurline stub resonators inside CPS results in bandpass and bandstop filters, depending on the PIN diode switch configurations. The work presents a novel circuit architecture aimed at reducing parasitic resonance of the spurline resonators and acquire the necessary series stub characteristics. The proposed filter resonates at 6.9-9 GHz and 1.7-4.7 GHz, and 8.4 GHz when the PIN diodes are forward and reverse-biased, respectively. It also resonates at 1-2.1 GHz, 4.8-5.3 GHz, and 6.9-9 GHz when one diode is reverse-biased, and the other is connected in forward bias. An insertion loss below -0.55 dB and a return loss less than 10dB have been obtained during simulation and measurement. The designed filter can find different applications for the 1.8 GHz GSM band, 2.4/5.8GHz (WLAN), 3.6 GHz (WiMAX), Long Term Evolution (LTE), and WIFI. The filter can be used in various multi-frequency systems owing to its compact size. The measured and simulated findings of the proposed CPS spurline stub resonator wideband bandpass filters are substantially consistent.
13 Feb 2024Submitted to International Journal of Numerical Modelling: Electronic Networks, Devices and Fields
13 Feb 2024Submission Checks Completed
13 Feb 2024Assigned to Editor
23 Mar 2024Review(s) Completed, Editorial Evaluation Pending
21 Apr 2024Editorial Decision: Revise Major
13 Jun 20241st Revision Received
17 Jun 2024Submission Checks Completed
17 Jun 2024Assigned to Editor
17 Jun 2024Review(s) Completed, Editorial Evaluation Pending
19 Jun 2024Reviewer(s) Assigned
30 Jul 20242nd Revision Received
31 Jul 2024Submission Checks Completed
31 Jul 2024Assigned to Editor
31 Jul 2024Review(s) Completed, Editorial Evaluation Pending
06 Aug 2024Reviewer(s) Assigned
23 Sep 2024Editorial Decision: Accept