High-Selectivity Performance Dual-Mode Folded Half-Wavelength Resonator Band Pass Filter for 5G Networks

Section: Research Paper
Issue
Vol. 30 No. 2 (2025): Volume 30 Issue 2
Published
Sep 1, 2025
Pages
176-182

Abstract

This paper presents the new dual-mode half-wavelength folded microstrip resonator. The capacitance effect achieves the external coupling by changing the gap distance, while stub loading achieves the internal coupling. The second-order Chebyshev bandpass (BPF) filter was simulated by HFSS software on a thin Rogers substrate. The BPF is operated at a center frequency of 1.980 GHz, which results in a return loss of 16.97 dB, while the insertion loss is equal to 1.2185 dB. The BPF measures its bandwidth at 3 dB, which is equivalent to 50 MHz. The spurious frequency occurs at 4.27 GHz. The resonator offers a size of about (0.726g 0.278g) which is smaller than a single mode. Moving the feeding line close to the center of the resonator has significantly enhanced the spurious window by about 2.75, and two Tzs appear on both band sides. The results show a satisfactory agreement with the requirement for 5G applications

References

  1. -S. G. Hong and M. J. Lancaster, "Microstrip filters for RF/microwave applications". John Wiley & Sons, 2004. ISBN: 978-0-471-38877-3.
  2. Al-hussein and S. Luhaib, "Design and miniaturized a high suppression stop band micro strip low pass filter by using slot defected ground structure for 5G applications," Al-Rafidain Engineering Journal, vol. 29, no. 1, pp. 126-131, 2024, https://doi.org/10.33899/arej.2024.145273.1311.
  3. Altaf, C. Xi, W. Shahzad, U. Dilshad, and J. Miao, "Design of millimeter-wave microstrip BPF using dual-mode ring resonator and folded half-wavelength resonators," in 2020 17th International Bhurban Conference on Applied Sciences and Technology (IBCAST), 2020: IEEE, pp. 653-657, DOI:10.1109/IBCAST47879.2020.9044528.
  4. Chen and D. Shen, "Dual-mode ISGW Bandpass Filters with TZs Based on Mode Controlling and Coupling," IEEE Access, vol. 13, pp. 51891-51899 2025, DOI:10.1109/ACCESS.2025.3539031.
  5. Ghazali and M. Sazid, "A planar BPF for UWB communication systems with single/multiple interference rejection bands," International Journal of Microwave and Wireless Technologies, vol. 16, no. 1, pp. 55-62, 2024, https://doi.org/10.1017/S1759078723001186.
  6. H. Hussein, S. W. Luhabi, M. T. Yaseen, and M. Jasim, "Study and design of class f power amplifier for mobile applications," J. Eng. Sci. Technol, vol. 16, no. 5, pp. 3822-3834, 2021.
  7. J. Konpang, M. Sandhu, N. Somjit, and I. Hunter, "Four-port microstrip diplexer for RF interference rejection," in 2016 13th International Conference on Electrical Engineering/Electronics, Computer, Telecommunications and Information Technology (ECTI-CON), 2016: IEEE, pp. 1-4, DOI:10.1109/ECTICon.2016.7561364
  8. Karthie and S. Salivahanan, "Fractally slotted patch resonator based compact dual-mode microstrip bandpass filter for Wireless LAN applications," AEU-International Journal of Electronics and Communications, vol. 107, pp. 264-274, 2019, https://doi.org/10.1016/j.aeue.2019.05.037.
  9. Karthie, D. Yogeshwari, and E. Venkadeshwari, "Compact dual-mode microstrip bandpass filter based on slotted square patch resonator," Microelectronics International, vol. 39, no. 2, pp. 49-57, 2021, https://doi.org/10.1108/MI-08-2021-0080.
  10. Konpang and N. Wattikornsirikul, "FourPort DualMode Diplexer with High Signal Isolation," Active and Passive Electronic Components, vol. 2020, no. 1, p. 4032673, 2020, https://doi.org/10.1155/2020/4032673
  11. Konpang, M. Sandhu, N. Somjit, and I. Hunter, "Novel RF interference rejection technique using a four-port diplexer," in 2016 46th European Microwave Conference (EuMC), 2016: IEEE, pp. 524-527, DOI:10.1109/EuMC.2016.7824395.
  12. Moscato, S. Caicedo, and M. Oldoni, "Bandpass filter with multiple selective absorptive stopbands for 28 GHz transmitters," International Journal of Microwave and Wireless Technologies, pp. 1-8, 2024, https://doi.org/10.1017/S1759078724000394.
  13. S. Bakr, S. W. Luhaib, and I. C. Hunter, "A novel dielectric-loaded dual-mode cavity for cellular base station applications," in 2016 46th European Microwave Conference (EuMC), 2016: IEEE, pp. 763-766, DOI:10.1109/EuMC.2016.7824455.
  14. W. Luhaib, M. S. Bakr, I. C. Hunter, and N. Somjit, "Compact triple-mode microwave dielectric resonator filters," International Journal of Electronics Letters, vol. 8, no. 2, pp. 194-204, 2020, https://doi.org/10.1080/00207217.2019.1582714
  15. W. Luhaib, N. Somjit, and I. C. Hunter, "Spurious stopband improvement of dualmode dielectric resonator filters using Tshaped coupling probe," IET Microwaves, Antennas & Propagation, vol. 12, no. 15, pp. 2345-2349, 2018, https://doi.org/10.1049/iet-map.2018.5296
  16. zuo, "Design of a Compact Millimeter-Wave Elliptic Low-Pass Filter with Wide Stopband and Tunable Features for Precision Millimeter-Wave Measurement Systems," Measurement Science and Technology, vol. 36, no. 3, 2025, DOI:10.1088/1361-6501/adb0e4.

Authors

Halah Rageh Mahmood

Electrical Engineering Department, College of Engineering, University of Mosul, Mosul, Iraq

Saad Wasmi Luhaib

Electrical Engineering Departement, Collage of Engineering, University of Mosul, Mosul, Iraq

ORCID

Identifiers

https://doi.org/10.33899/arej.2025.159535.1413
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How to Cite

[1]
H. Rageh Mahmood and S. Wasmi Luhaib, “High-Selectivity Performance Dual-Mode Folded Half-Wavelength Resonator Band Pass Filter for 5G Networks”, AREJ, vol. 30, no. 2, pp. 176–182, Sep. 2025.
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