Skip to main content
Unpublished Paper
Reconfigurable Bandwidth and Tunable Dual-Band BPF Design for UWB Applications
Technical Report MRG 7–2016 (2016)
  • Mushtaq A. Alqaisy, Department of Networks Engineering, College of Engineering, Al-Iraqia University, Baghdad, Iraq
  • C. Chakrabraty, Department of Electronics and Communication Engineering, College of Engineering, Universiti Tenaga Nasional, Malaysia
  • Jawad K. Ali, Department of Electrical Engineering, University of Technology, Iraq
  • A. R. H. Alhawari, Department of Electrical Engineering, Najran University, King Abdulaziz Road, 1988 Najran City, Saudi Arabia
  • Tale Saeidi, Department of Computer and Communication Systems Engineering, Faculty of Engineering, Universiti Putra Malaysia, Malaysia
Abstract
Four square ring resonators together with an L-shaped uniform open tuning stub is the base of an ultra-wide bandpass filter (BPF). Based on the bandpass-coupled edge, a small gap was created in the feed lines of the proposed BPF to obtain a second lower band. This study introduces a dual-band BPF. The main advantage of this BPF is its capability to reconfigure bandwidth and tune the center frequency of a dual-band BPF function. The microstrip BPF is reconfigured into a dual band when varactor diodes are fixed on the head of each uniform stub. The roll-off is characterized by sharp edges of 81.325 and 80.165 GHz/dB, which provided this filter with high selectivity in the transmission band, a wide stopband of more than 2 GHz in both sides, and a rejection band of up to 32 dB. Results show better performance of S21, which fluctuated from 4 dB to 1.5 dB within the transmission band from 8.327 GHz to 13.942 GHz. All the reported filters were modeled, and their corresponding responses were assessed by using CST Microwave Studio. Measured and simulated results of the proposed BPF filters were compared, and the results indicate good agreement.
Keywords
  • Reconfigurable BPF,
  • Ring resonator,
  • Dual-band,
  • Transmission zero,
  • Roll-off
Publication Date
April 15, 2016
Citation Information
Alqaisy, Mushtaq A. , C. Chakrabraty, Jawad K. Ali, A. R. H. Alhawari and Tale Saeidi, “Reconfigurable Bandwidth and Tunable Dual-Band BPF Design for UWB Applications,” Technical Report, MRG 7–2016, Microwave Research Group, Department of Electrical Engineering, University of Technology, Iraq, April 15, 2016.