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Compact Ultra-Wide Upper Stopband Microstrip Dual-Band BPF Using Tapered and Octagonal Loop Resonators

  • Shiva Khani , Mohammad Danaie , Pejman Rezaei EMAIL logo and Ali Shahzadi
Published/Copyright: August 30, 2019
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Frequenz
From the journal Frequenz Volume 74 Issue 1-2

Abstract

In this paper, a microstrip dual-band bandpass filter (DBBPF) based on an octagonal loop resonator (OLR), tapered resonators and open bended stubs (OBSs) is designed and analysed. The proposed structure produces two passbands with the centre frequencies of 3.65 and 5.67 GHz. The marked advantages of the proposed filter are as follows: Two centre frequencies can be individually tuned. The bandwidth of the upper passband can also be controlled. Furthermore, the DBBPF benefits from an ultra-wide upper stopband from 5.9 up to 21 GHz with an attenuation level of higher than 20 dB and a small size of 0.21 λg × 0.26 λg, where λg is the guided wavelength at 3.65 GHz. The designed filter is horizontally and vertically symmetrical leading to a reciprocal S matrix. Other remarkable specifications of the proposed filter are the insertion loss < 0.62 dB, the return loss > 20.2 dB and sharp response. To provide an analytical description, the LC equivalent circuits of initial and main resonators are presented. Acceptable similarity between simulated and measured results verifies the design process.

Keywords: microstrip filter; octagonal loop resonator (OLR); open bended stub (OBS); tapered resonator; tunable frequency; ultra-wide stopband

Acknowledgements

The filter measurement was done by Iran Telecommunication Research Center (ITRC). The authors would like to thank the ITRC Antenna Lab members, especially Mr Solat and Mr Akhlaghpasandi, for their cooperation. The authors would also like to thank the reviewers for their valuable comments.

References

[1] J. S. G. Hong and M. J. Lancaster, Microstrip Filters for RF/microwave Applications, vol. 167, Hoboken, New Jersey, United States: John Wiley & Sons, 2004.Search in Google Scholar

[2] S. Khani and M. Hayati, “Compact microstrip lowpass filter with wide stopband and sharp roll-off,” Microw. J., vol. 60, no. 11, pp. 86–92, 2017.Search in Google Scholar

[3] S. M. H. Mousavi, S. V. A. D. Makki, and H. Siahkamari, “Design of microstrip lowpass filter using bend configuration with excellent sharpness in transition band,” Frequenz, vol. 70, no. 5-6, pp. 237–243, 2016.10.1515/freq-2015-0096Search in Google Scholar

[4] S. M. H. Mousavi, S. Raziani, and A. Falihi, “Design of high performance microstrip lpf with analytical transfer function,” Frequenz, vol. 72, no. 1-2, pp. 63–71, 2017.10.1515/freq-2016-0288Search in Google Scholar

[5] S. Khani, M. Danaie, and P. Rezaei, “Miniaturized microstrip dual-band bandpass filter with wide upper stop-band bandwidth,” Analog Integr. Circuits Signal Process., vol. 98, no. 2, pp. 367–376, 2018.10.1007/s10470-018-1254-xSearch in Google Scholar

[6] B. Denis, K. Song, and F. Zhang, “Compact dual-band bandpass filter using open stub-loaded stepped impedance resonator with cross-slots,” Int. J. Microw. Wireless Tech., vol. 9, no. 2, pp. 269–274, 2017.10.1017/S1759078715001786Search in Google Scholar

[7] K. Deng, J. Z. Zhang, B. Wu, S. J. Sun, and X. W. Shi, “Design of microstrip tri-band bandpass filter using square ring loaded resonator,” J. Electromagn. Waves Appl., vol. 28, no. 18, pp. 2364–2373, 2018.10.1080/09205071.2014.969812Search in Google Scholar

[8] S. L. S. Pajović, M. M. Potrebić, D. V. Tošić, and Z. Ž. Cvetković, “Fabrication parameters affecting implementation of waveguide bandpass filter with complementary split-ring resonators,” J. Comput. Electron., vol. 15, no. 4, pp. 1462–1472, 2016.10.1007/s10825-016-0909-zSearch in Google Scholar

[9] K. Song, Y. Zhu, M. Zhao, M. Fan, and Y. Fan, “Miniaturized bandpass filter using dual-mode hexagonal loop resonator,” Int. J. Microw. Wireless Tech., vol. 9, no. 5, pp. 1003–1008, 2017.10.1017/S1759078716001094Search in Google Scholar

[10] C. Ding, J. Li, F. Wei, and X. W. Shi, “Compact bandpass filter based on parallel-coupled lines and quasi-lumped structure,” Frequenz, vol. 70, no. 1-2, pp. 11–15, 2016.10.1515/freq-2015-0056Search in Google Scholar

[11] C. F. Chen, S. F. Chang, B. H. Tseng, and J. H. Weng, “Compact dual-band stepped-impedance resonator filter with separate coupling paths,” Electron. Lett., vol. 50, no. 21, pp. 1551–1552, 2014.10.1049/el.2014.2982Search in Google Scholar

[12] S. Khani, S. V. A. D. Makki, S. M. H. Mousavi, M. Danaie, and P. Rezaei, “Adjustable compact dual-band microstrip bandpass filter using T-shaped resonators,” Microw. Opt. Tech. Lett., vol. 59, no. 12, pp. 2970–2975, 2017.10.1002/mop.30864Search in Google Scholar

[13] S. Khani, S. M. H. Mousavi, M. Danaie, and P. Rezaei, “Tunable compact microstrip dual-band bandpass filter with tapered resonators,” Microw. Opt. Tech. Lett., vol. 60, no. 5, pp. 1256–1261, 2018.10.1002/mop.31151Search in Google Scholar

[14] X. T. Zou, Z. J. Yang, F. Wei, B. Li, and X. W. Shi, “Compact balanced single-band and dual-band BPFs with controllable bandwidth using foldedS-shaped slotline resonators (FSSRs),” Frequenz, vol. 73, no. 1-2, pp. 13–18, 2019.10.1515/freq-2018-0086Search in Google Scholar

[15] V. Singh, V. K. Killamsetty, and B. Mukherjee, “Miniaturized bandpass filter with wide stopband using spiral configuration of stepped impedance resonator,” Frequenz, vol. 72, no. 9-10, pp. 455–458, 2018.10.1515/freq-2017-0192Search in Google Scholar

[16] A. Kumar and K. V. Machavaram, “Microstrip filter with defected ground structure: a close perspective,” Int. J. Microw. Wirel. Techn., vol. 5, no. 5, pp. 589–602, 2013.10.1017/S1759078713000639Search in Google Scholar

[17] A. O. Ertay, M. Abbak, and S. Şimşek, “An improved stopband and sharp roll off microstrip low pass filter with defected ground structures,” Int. J. Microw. Wirel. Techn., vol. 8, no. 3, pp. 573–581, 2016.10.1017/S175907871500094XSearch in Google Scholar

[18] Y. Wu, Z. Hou, and Y. Liu, “A novel single-layer microstrip coupler with arbitrary power division ratio and harmonics suppression,” Electromagnetics, vol. 34, no. 6, pp. 497–512, 2014.10.1080/02726343.2014.922776Search in Google Scholar

[19] S. Maheswari and T. Jayanthy, “High directivity microstrip coupler with asymmetric structure,” Frequenz, vol. 68, no. 9-10, pp. 421–426, 2014.10.1515/freq-2014-0039Search in Google Scholar

[20] H. Siahkamari, S. V. A. Makki, and S. A. Malakooti, “Using microstrip LPF in Gysel power divider for extreme size reduction and higher order harmonic suppression,” Frequenz, vol. 69, no. 7-8, pp. 323–328, 2015.10.1515/freq-2014-0213Search in Google Scholar

[21] H. Siahkamari, Z. Yasoubi, M. Jahanbakhshi, S. M. H. Mousavi, P. Siahkamari, M. E. Nouri, and R. Azadi, “Design of compact wilkinson power divider with harmonic suppression using T-shaped resonators,” Frequenz, vol. 72, no. 5-6, pp. 253–259, 2018.10.1515/freq-2016-0219Search in Google Scholar

[22] S. A. Malakooti, S. M. H. Mousavi, and C. Fumeaux, “Tunable bandpass-to-bandstop quasi yagi-uda antenna with sum and difference radiation patterns,” IEEE. Trans. Antennas Propag., vol. 67, no. 4, pp. 2260–2271, 2019.10.1109/TAP.2019.2891451Search in Google Scholar

[23] M. Borhani, P. Rezaei, and A. Valizade, “Design of a reconfigurable miniaturized microstrip antenna for switchable multiband systems,” IEEE. Antennas Wirel. Propag. Lett., vol. 15, pp. 822–825, 2016.10.1109/LAWP.2015.2476363Search in Google Scholar

[24] M. M. Fakharian, P. Rezaei, A. A. Orouji, and M. Soltanpur, “A wideband and reconfigurable filtering slot antenna,” IEEE. Antennas Wirel. Propag. Lett., vol. 15, pp. 1610–1613, 2016.10.1109/LAWP.2016.2518859Search in Google Scholar

[25] H. Tizyi, F. Riouch, A. Tribak, A. Najid, and A. Mediavilla, “Microstrip diplexer design based on two square open loop bandpass filters for RFID applications,” Int. J. Microw. Wirel. Tech., vol. 10, no. 4, pp. 412–421, 2018.10.1017/S1759078718000314Search in Google Scholar

[26] T. Yang and G. M. Rebeiz, “A simple and effective method for 1.9–3.4-GHz tunable diplexer with compact size and constant fractional bandwidth,” IEEE. Trans. Microw. Theory Tech., vol. 64, no. 2, pp. 436–449, 2016.10.1109/TMTT.2015.2504937Search in Google Scholar

[27] A. Gimenez, J. Verdú, E. Corrales, and P. de Paco Sánchez, “A compact microstrip T-type switch for narrowband applications,” IEEE. Trans. Microw. Theory Tech., vol. 66, no. 1, pp. 170–176, 2018.10.1109/TMTT.2017.2756933Search in Google Scholar

[28] S. Kiani, P. Rezaei, M. Navaei, and M. S. Abrishamian, “Microwave sensor for detection of solid material permittivity in single/multilayer samples with high quality factor,” IEEE. Sens. J., vol. 18, no. 24, pp. 9971–9977, 2018.10.1109/JSEN.2018.2873544Search in Google Scholar

[29] S. Kiani, P. Rezaei, M. Karami, and R. A. Sadeghzadeh, “Substrate integrated waveguide quasi-elliptic bandpass filter with parallel coupled microstrip resonator,” Electron. Lett., vol. 54, no. 10, pp. 667–668, 2018.10.1049/el.2018.0170Search in Google Scholar

[30] S. Khani, M. Danaie, and P. Rezaei, “Realization of single-mode plasmonic bandpass filters using improved nanodisk resonators,” Opt. Commun., vol. 420, pp. 147–156, 2018.10.1016/j.optcom.2018.03.047Search in Google Scholar

[31] S. Khani, M. Danaie, and P. Rezaei, “Design of a single-mode plasmonic bandpass filter using a hexagonal resonator coupled to graded-stub waveguides,” Plasmonics, vol. 14, no. 1, pp. 53–62, 2018.10.1007/s11468-018-0777-4Search in Google Scholar

[32] S. Khani, M. Danaie, and P. Rezaei, “Double and triple-wavelength plasmonic demultiplexers based on improved circular nanodisk resonators,” Opt. Eng., vol. 57, no. 10, pp. 107102, 2018.10.1117/1.OE.57.10.107102Search in Google Scholar

[33] S. Khani, M. Danaie, and P. Rezaei, “Tunable single-mode bandpass filter based on metal-insulator-metal plasmonic coupled U-shaped cavities,” IET. Optoelectron. vol. 13, pp. 161–171, 2019.10.1049/iet-opt.2018.5098Search in Google Scholar

[34] M. Danaie and A. Shahzadi, “Design of a high-resolution metal–insulator–metal plasmonic refractive index sensor based on a ring-shaped si resonator,” Plasmonics, pp. 1–13, 2019. https://doi.org/10.1007/s11468-019-00926-9pp.10.1007/s11468-019-00926-9Search in Google Scholar

[35] S. Khani, M. Danaie, and P. Rezaei, “Size reduction of MIM surface plasmon based optical bandpass filters by the introduction of arrays of silver nano-rods,” Physica E: Low-dimensional Syst. Nanostruct., vol. 113, pp. 25–34, 2019.10.1016/j.physe.2019.04.015Search in Google Scholar

[36] A. Geravand, M. Danaie, and S. Mohammadi, “All-optical photonic crystal memory cells based on cavities with a dual-argument hysteresis feature,” Opt. Commun., vol. 430, pp. 323–335, 2019.10.1016/j.optcom.2018.08.052Search in Google Scholar

[37] M. Moradi, M. Danaie, and A. A. Orouji, “Design and analysis of an optical full-adder based on nonlinear photonic crystal ring resonators,” Optik, vol. 172, pp. 127–136, 2018.10.1016/j.ijleo.2018.07.016Search in Google Scholar

[38] M. Danaie and B. Kiani, “Design of a label-free photonic crystal refractive index sensor for biomedical applications,” Photonics Nanostruct. Fundam. App., vol. 31, pp. 89–98, 2018.10.1016/j.photonics.2018.06.004Search in Google Scholar

[39] M. Danaie, R. Nasiri Far, and A. Dideban, “Design of a high-bandwidth Y-shaped photonic crystal power splitter for TE modes,” Int. J. Opt. Photon., vol. 12, no. 1, pp. 33–42, 2018.10.29252/ijop.12.1.33Search in Google Scholar

[40] M. M. Ghods and P. Rezaei, “Graphene-based fabry-perot resonator for chemical sensing applications at mid-infrared frequencies,” IEEE. Photon. Tech. Lett., vol. 30, no. 22, pp. 1917–1920, 2018.10.1109/LPT.2018.2872180Search in Google Scholar

[41] C. Karpuz and A. K. Gorur, “Effects of narrow slits on frequency response of a microstrip square loop resonator and dual-mode filter applications”, Microw. Opt. Technol. Lett., vol. 55, no. 1, pp. 143–146, 2013.10.1002/mop.27237Search in Google Scholar

[42] M. Alqaisy, C. Chakrabraty, J. Ali, and A. R. Alhawari, “A miniature fractal-based dual-mode dual-band microstrip bandpass filter design”, Int. J. Microw. Wireless Technol., vol. 7, no. 2, pp. 127–133, 2015.10.1017/S1759078714000622Search in Google Scholar

[43] A. S. Horton, S. L. Chilton, H. H. Sigmarsson, and J. E. Ruyle, “Tunable microstrip filter element using magnetically-repositioned ferrofluid load”, Electron. Lett., vol. 53, no. 4, pp. 256–258, 2017.10.1049/el.2016.4567Search in Google Scholar

[44] M. K. Shereen, M. I. Khattak, and G. Witjaksono, “A brief review of frequency, radiation pattern, polarization, and compound reconfigurable antennas for 5G applications,” J. Comput. Electron., pp. 1–38, 2019. https://doi.org/10.1007/s10825-019-01336-0.10.1007/s10825-019-01336-0Search in Google Scholar

[45] S. Yang, L. Lin, J. Chen, K. Deng, and C. H. Liang, “Design of compact dual-band bandpass filter using dual-mode stepped-impedance stub resonators,” Electron. Lett., vol. 50, no. 8, pp. 611–613, 2014.10.1049/el.2013.4217Search in Google Scholar

[46] L. Lin, S. J. Sun, B. Wu, and C. H. Liang, “Dual-band bandpass filter with wide upper stopband using quad-mode stepped impedance stub-loaded resonator,” Electron. Lett., vol. 50, no. 16, pp. 1145–1146, 2014.10.1049/el.2014.2004Search in Google Scholar

[47] C. F. Chen, S. F. Chang, B. H. Tseng, and J. H. Weng, “Compact dual-band stepped-impedance resonator filter with separate coupling paths,” Electron. Lett., vol. 50, no. 21, pp. 1551–1552, 2014.10.1049/el.2014.2982Search in Google Scholar

[48] Q. Duan, K. Song, F. Chen, and Y. Fan, “Compact dual-band bandpass filter using simply hybrid structures,” Electron. Lett., vol. 51, no. 16, pp. 1265–1266, 2015.10.1049/el.2015.1633Search in Google Scholar

[49] M. Danaeian, E. Zarezadeh, and H. Ghayoumi-Zadeh, “A compact and high performance dual-band bandpass filter based on unbalanced composite right/left-handed transmission lines for WLANs applications,” Analog Integr. Circuits Signal Process., vol. 94, no. 3, pp. 469–479, 2018.10.1007/s10470-018-1104-xSearch in Google Scholar

[50] Q. Li, Y. Zhang, D. Li, and J. L. W. Li, “Miniaturized tri-band bandpass filters based on multi-mode resonators with pseudo-interdigital structure,” Electromagnetics, vol. 35, no. 7, pp. 488–497, 2015.10.1080/02726343.2015.1084575Search in Google Scholar

[51] K. Song, F. Zhang, and Y. Fan, “Miniaturized dual-band bandpass filter with good frequency selectivity using SIR and DGS,” AEU-Int. J. Electron. Commun., vol. 68, no. 5, pp. 384–387, 2014.10.1016/j.aeue.2013.10.005Search in Google Scholar

[52] C. Kim, T. Hyeon Lee, B. Shrestha, and K. Chul Son, “Miniaturized dual-band bandpass filter based on stepped impedance resonators,” Microw Opt. Tech. Lett., vol. 59, no. 5, pp. 1116–1119, 2017.10.1002/mop.30481Search in Google Scholar

[53] F. Wei, P. Y. Qin, Y. J. Guo, C. Ding, and X. W. Shi, “Compact balanced dual-and tri-band BPFs based on coupled complementary split-ring resonators (C-CSRR),” IEEE. Microw. Wirel. Compon. Lett., vol. 26, no. 2, pp. 107–109, 2016.10.1109/LMWC.2016.2517125Search in Google Scholar

[54] M. C. Tang, T. Shi, S. Chen, and H. Cao, “Dual-band bandpass filter based on a single triple-mode ring resonator,” Electron. Lett., vol. 52, no. 9, pp. 722–724, 2016.10.1049/el.2015.2692Search in Google Scholar

Received: 2019-04-23
Published Online: 2019-08-30
Published in Print: 2020-01-28

© 2020 Walter de Gruyter GmbH, Berlin/Boston

Articles in the same Issue

  1. Frontmatter
  2. Research Articles
  3. Wide-Angle RCS Enhanced Tag Based on Dielectric Resonator – Lens Combination
  4. 4-Channel Tunable Optical Demultiplexer Based on Nonlinearity Phenomenon in 2D Resonant Cavity Photonic Crystals
  5. Near Zero Parameter Metamaterial Inspired Superstrate for Isolation Improvement in MIMO Wireless Application
  6. A Tri-band Angularly Stable Frequency Selective Surface with Controllable Resonances for EM Shielding
  7. Dual-Polarization and Low-Sidelobe Corrugated Rectangular Horn Antennas for Outdoor RCS Measurement
  8. Circularly Polarized Microstrip Antenna Using SLPD Electromagnetic Band Gap Structure
  9. Design of Novel Compact Quad-Band Bandpass Filter with High Selectivity
  10. Compact Ultra-Wide Upper Stopband Microstrip Dual-Band BPF Using Tapered and Octagonal Loop Resonators
  11. Modelling of Acoustic Wave Propagation Due to Partial Discharge and Its Detection and Localization in an Oil-Filled Distribution Transformer
  12. A 5.7 mW, UWB LNA for Wireless Applications Using Noise Canceling Technique in 90 nm CMOS
https://doi.org/10.1515/freq-2019-0060
Keywords for this article
microstrip filter; octagonal loop resonator (OLR); open bended stub (OBS); tapered resonator; tunable frequency; ultra-wide stopband

Articles in the same Issue

  1. Frontmatter
  2. Research Articles
  3. Wide-Angle RCS Enhanced Tag Based on Dielectric Resonator – Lens Combination
  4. 4-Channel Tunable Optical Demultiplexer Based on Nonlinearity Phenomenon in 2D Resonant Cavity Photonic Crystals
  5. Near Zero Parameter Metamaterial Inspired Superstrate for Isolation Improvement in MIMO Wireless Application
  6. A Tri-band Angularly Stable Frequency Selective Surface with Controllable Resonances for EM Shielding
  7. Dual-Polarization and Low-Sidelobe Corrugated Rectangular Horn Antennas for Outdoor RCS Measurement
  8. Circularly Polarized Microstrip Antenna Using SLPD Electromagnetic Band Gap Structure
  9. Design of Novel Compact Quad-Band Bandpass Filter with High Selectivity
  10. Compact Ultra-Wide Upper Stopband Microstrip Dual-Band BPF Using Tapered and Octagonal Loop Resonators
  11. Modelling of Acoustic Wave Propagation Due to Partial Discharge and Its Detection and Localization in an Oil-Filled Distribution Transformer
  12. A 5.7 mW, UWB LNA for Wireless Applications Using Noise Canceling Technique in 90 nm CMOS
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