Hostname: page-component-76fb5796d-r6qrq Total loading time: 0 Render date: 2024-04-26T06:19:47.667Z Has data issue: false hasContentIssue false
  • English
  • Français

Design of compact microstrip low-pass filter with analytical sharpness of transition band

Published online by Cambridge University Press:  17 June 2015

Hesam Siahkamari ,
Ehsan Heidarinezhad ,
Ehsan Zarayeneh ,
Seyyed Ali Malakooti ,
Seyyed Mohammad Hadi Mousavi  and
Payam Siahkamari
Hesam Siahkamari*
Affiliation:
Electrical Engineering Department, Engineering Faculty, Razi University, Kermanshah, Iran. Phone: +989183326304
Ehsan Heidarinezhad
Affiliation:
Department of Electrical Engineering, Kermanshah Branch, Islamic Azad University, Kermanshah, Iran
Ehsan Zarayeneh
Affiliation:
Electrical Engineering Department, Islamic Azad University, South Tehran Branch, Tehran, Iran
Seyyed Ali Malakooti
Affiliation:
Electrical Engineering Department, Engineering Faculty, Razi University, Kermanshah, Iran. Phone: +989183326304
Seyyed Mohammad Hadi Mousavi
Affiliation:
Department of Electrical Engineering, Kermanshah Branch, Islamic Azad University, Kermanshah, Iran
Payam Siahkamari
Affiliation:
Department of Electrical Engineering, Kermanshah Branch, Islamic Azad University, Kermanshah, Iran
*
Corresponding author: H. Siahkamari Email: hesamsiahkamari@yahoo.com
Get access Rights & Permissions [Opens in a new window]

Abstract

A novel microstrip low-pass filter (LPF) using radial patched resonator and modified T-shaped resonators is designed to achieve ultra-wide stop-band. Also, the designed LPF has successfully addressed the problems of compactness and insertion loss, simultaneously. LC equivalent circuit of the proposed filter is calculated and equation for the sharpness in transition band is obtained based on LC equivalent circuit and transfer function. The proposed filter not only exhibits a very wide stop-band of 168%, but also is able to suppress the 11th-harmonic response in conjunction with a small size of 0.147 × 0.052λg, where λg is the guided wavelength at 1.47 GHz. It is shown that the simulated results are highly consistent with the measured data.

Keywords

Low-pass filterWide stopbandEquivalent circuitTransfer functionAnalytical sharpness
Type
Research Papers
Information
International Journal of Microwave and Wireless Technologies , Volume 8 , Issue 7 , November 2016 , pp. 1017 - 1022
Copyright
Copyright © Cambridge University Press and the European Microwave Association 2015 

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

References

REFERENCES

[1] Hong, J.S.; Lancaster, M.J.: Microstrip Filters for RF/Microwave Applications, John Wiley & Sons, Inc., 2001.CrossRefGoogle Scholar
[2] Vamsi, K.V.; Subrata, S.: Sharp roll-off lowpass filter with wide stopband using stub-loaded coupled-line hairpin unit. IEEE Microw. Wireless Compon. Lett., 21 (6) (2011), 301–303.Google Scholar
[3] Karimi, G.; Lalbakhsh, A.; Siahkamari, H.: Design of sharp roll-off lowpass filter with ultra wide stopband. IEEE Microw. Wireless Compon. Lett., 23 (6) (2013), 303–305.Google Scholar
[4] Kaixue, M.; Kiat, S.Y.: New ultra-wide stopband low-pass filter using transformed radial stubs. IEEE Trans. Microw. Theory. Tech., 59 (3) (2011), 604–611.Google Scholar
[5] Wang, J.; Xu, L.-J.; Zhao, S.; Guo, Y.-X.; Wu, W.: Compact quasi-elliptic microstrip lowpass filter with wide stopband. IET Electron. Lett., 46 (20) (2010), 1384–1385.Google Scholar
[6] Hayati, M.; Asadbeigi, H.; Sheikhi, A.: Microstrip lowpass filter with high and wide rejection band. Electron. Lett, 48 (19) (2012), 1217–1219.Google Scholar
[7] Sariri, H., Rahmani, Z., Lalbakhsh, A., Majidifar, S.: Compact LPF using T-shaped resonator. Frequenz, 67 (1–2) (2013), 17–20.Google Scholar
[8] Wang, J.P.; Ge, L.; Guo, Y.-X.; Wu, W.: Miniaturised microstrip lowpass filter with broad stopband and sharp roll-off. Electron. Lett., 46 (8) (2010), 573–575.Google Scholar
[9] Hayati, M.; Abdipour, A.; Abdipour, A.: Compact microstrip lowpass filter with sharp roll-off and ultra-wide stop-band. Electron. Lett., 49 (18) (2013), 1159–1160.Google Scholar
[10] Wadell, B.C.: Transmission Line Design Handbook, British library cataloguing in publishing data, 1991.Google Scholar