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<p>This research paper introduces design of a tunable compact bandpass filter (BPF) for wireless and mobile RF systems. The proposed design of tunable BPF is based on defected microstrip rectangular resonators (DMRRs) implemented on a Rogers RT6010 substrate. Additionally, an Interdigital Capacitor (IDC) and a Defected Microstrip Structure (DMS) slots are employed to reduce the filter size. To achieve frequency tunability, the filter incorporates two Positive Intrinsic Negative (PIN) diodes smp1345_079LF from Skyworks, which are integrated into each resonator. The suitability of the proposed design for the different applications lies in the ISM and LTE frequency bands. The resonating frequency for all switches OFF modes is achieved at 2.6&#xa0;GHz and for all switches ON mode at 2.4&#xa0;GHz. The proposed design provides low insertion loss, measuring less than 0.36 dB by maintaining a very compact size of 4.7&#xa0;mm × 8.4&#xa0;mm, which can be used for next-generation communication systems.</p>

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Design, simulation and performance analysis of a compact tunable bandpass filter for ISM and LTE applications

  • 期刊论文

  • 发表日期：

    2025年10月30日

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  • Abdelhafid Belmajdoub,
  • Mohammed Jorio,
  • Saad Bennani

摘要

This research paper introduces design of a tunable compact bandpass filter (BPF) for wireless and mobile RF systems. The proposed design of tunable BPF is based on defected microstrip rectangular resonators (DMRRs) implemented on a Rogers RT6010 substrate. Additionally, an Interdigital Capacitor (IDC) and a Defected Microstrip Structure (DMS) slots are employed to reduce the filter size. To achieve frequency tunability, the filter incorporates two Positive Intrinsic Negative (PIN) diodes smp1345_079LF from Skyworks, which are integrated into each resonator. The suitability of the proposed design for the different applications lies in the ISM and LTE frequency bands. The resonating frequency for all switches OFF modes is achieved at 2.6 GHz and for all switches ON mode at 2.4 GHz. The proposed design provides low insertion loss, measuring less than 0.36 dB by maintaining a very compact size of 4.7 mm × 8.4 mm, which can be used for next-generation communication systems.