A Miniaturized wide Stopband Low-pass Filter using  T and Modified L Shapes Resonators

Mani D. Fadaee; Farzin Shama; Mohammad S. Feali; Maryam S. Gilan

doi:10.14500/aro.11157

Mani D. Fadaee Department of Electrical Engineering, Kermanshah Branch, Islamic Azad University, Kermanshah, Iran
Farzin Shama Department of Electrical Engineering, Kermanshah Branch, Islamic Azad University, Kermanshah, Iran https://orcid.org/0000-0003-3032-2900
Mohammad S. Feali Department of Electrical Engineering, Kermanshah Branch, Islamic Azad University, Kermanshah, Iran https://orcid.org/0000-0002-7894-6221
Maryam S. Gilan Department of Electrical Engineering, Kermanshah Branch, Islamic Azad University, Kermanshah, Iran https://orcid.org/0000-0002-9242-1405

Keywords: Low-pass filter, L-shaped, Microstrip, Resonator, Sharp roll off, T-shaped

Abstract

A new structure of microstrip-based low-pass filter with wide stopband and sharp roll-off is introduced, in this paper. In the proposed topology, resonators with T and modified L Shapes have been used. To improve the suppression factor and relative stopband bandwidth, the second resonator has been added to the first resonator. The designed filter has been fabricated on a 20 mm thickness RO4003 substrate, which has a loss tangent of 0.0021 and a relative dielectric constant equal to 3.38. All parameters including roll of rate, stopband, bandwidth, return loss, insertion loss, and figure of merit have significant coefficients. Simulation has been ran using advanced design system software. The 3dB cutoff frequency is appropriate. The value of the insertion loss parameter is <0.1 dB and the S11 parameter is −22 dB at this point. The stopband is extended from 2.42 up to 24 GHz, which shows an ultra-stopband. The results of the simulation and experiment are almost similar, which indicates a proper performance of the designed structure.

Downloads

Download data is not yet available.

Author Biographies

Mani D. Fadaee, Department of Electrical Engineering, Kermanshah Branch, Islamic Azad University, Kermanshah, Iran

Mani Da. Fadaee has a B.Sc. degree in Electronics, and M.Sc. degree in Electronicas from the Islamic Azad University of Kermanshah. Currently, he ais studying for a Ph.D. in Electronics at the Islamic Azad University of Kermanshah. His research interests include High Frequency Power Amplifiers and Filters Design.

Farzin Shama, Department of Electrical Engineering, Kermanshah Branch, Islamic Azad University, Kermanshah, Iran

Farzin Shama is an Assistant Professor at Kermanshah Branch, Islamic Azad University, Kermanshah, Iran. received the B.Sc. , M.Sc. and and Ph.D. degrees in Electronics from Razi University, Kermanshah, Iran in 2009, 2012 and 2016, respectively. His research interests include the artificial intelligent, complex circuits and systems solutions, Analog circuits and design, microwave engineering, and passive and active circuits design and fabrication.

Mohammad S. Feali, Department of Electrical Engineering, Kermanshah Branch, Islamic Azad University, Kermanshah, Iran

Mohammad S. Feali is a Lecturer at the Islamic Azad University, Kermanshah branch, Kermanshah, Iran. He received the B.Sc. degree in Electrical Engineering from Islamic Azad University, Kermanshah branch, Iran, in 2010, the M.Sc. degree in Electronics Engineering from Islamic Azad University, Tehran branch, Iran, in 2012, and the Ph.D. degree in Electronics from the University of Razi, Kermanshah, Iran, in 2018. His research interests include Memristors, Neuromorphic, Microfluidics, High frequencies devices and Digital system design.

Maryam S. Gilan, Department of Electrical Engineering, Kermanshah Branch, Islamic Azad University, Kermanshah, Iran

Maryam S. Gilan ia an Assistant Professor at Kermanshah Branch, Islamic Azad university, Kermanshah, Iran. She received the B.Sc. degree in Electrical and Electronics Engineering from Shahid Beheshti University, Tehran, Iran, in 2010 and M.Sc. degree in Telecommunications Engineering in Shahid Beheshti university, Tehran, Iran, in 2013. She received PhD degree in Telecommunications Engineering in Science and Research Branch, Islamic Azad university, Tehran, Iran, in 2019. Her research interests include Antenna, High frequencies devices, Nanotechnology and Microwave components.

References

Bhat, U.R., Jha, K.R., and Singh, G., 2018. Wide stopband harmonic suppressed low‐pass filter with novel DGS. International Journal of RF and Microwave Computer‐Aided Engineering, 28(5), p.e21235.

Chen, F.C., Li, R.S., and Chu, Q.X., 2017. Ultra-wide stopband low-pass filter using multiple transmission zeros. IEEE Access, 5, pp.6437-6443.

Du, Z., Yang, H., Zhang, H., and Zhu, M., 2014. Compact lowpass filter with high suppression level and wide stopband using stepped impedance m‐shape units. Microwave and Optical Technology Letters, 56(12), pp.2947-2950.

Hayati, M., Abbasi, H., and Fathabadi, O.S., 2015. A novel microstrip lowpass filter with sharp roll-off and ultra-wide stopband using SICMRC. International Journal of Electronics, 102(9), pp.1475-1485.

Hayati, M., Abbasi, H., and Shama, F., 2014. Microstrip lowpass filter with ultrawide stopband and sharp roll-off. Arabian Journal for Science and Engineering, 39, pp.6249-6253.

Hayati, M., and Shama, F., 2017. A compact lowpass filter with ultra wide stopband using stepped impedance resonator. Radioengineering, 26(1), pp.269-274.

Hiedari, B., and Shama, F., 2018. A harmonics suppressed microstrip cell for integrated applications. AEU-International Journal of Electronics and Communications, 83, pp.519-22.

Hong, J.S.G., and Lancaster, M.J., 2004. Microstrip Filters for RF/Microwave Applications. John Wiley and Sons, United States.

Imani, M.A., Shama, F., Alirezapoori, M., and Ekhteraei, M., 2018. Miniaturized microstrip lowpass filter using cylindrical-shaped resonators for integrated applications. Analog Integrated Circuits and Signal Processing, 95, pp.223-229.

Jiang, S., and Xu, J., 2017. Compact microstrip lowpass filter with ultra‐wide stopband based on dual‐plane structure. Electronics Letters, 53(9) , pp.607-609.

Jiang, Y., Wei, B., Heng, Y., Guo, X., Cao, B., and Jiang, L., 2017. Compact superconducting lowpass filter with wide stopband. Electronics Letters, 53(14), pp.931-933.

Kolahi, A., and Shama, F., 2018. Compact microstrip low pass filter with flat group-delay using triangle-shaped resonators. AEU-International Journal of Electronics and Communications, 83, pp.433-438.

Kumar, L., and Parihar, M.S., 2016. Compact hexagonal shape elliptical low pass filter with wide stop band. IEEE Microwave and Wireless Components Letters, 26(12), pp.978-980.

Pozar, D.M., 2011. Microwave Engineering. John wiley and Sons, United States.

Rekha, T.K., Abdulla, P., Jasmine, P.M., and Anu, A.R., 2020. Compact microstrip lowpass filter with high harmonics suppression using defected structures. AEUInternational Journal of Electronics and Communications, 115, p.153032.

Shama, F., Hayati, M., and Ekhteraei, M., 2018. Compact microstrip lowpass filter using meandered unequal T-shaped resonator with ultra-wide rejection band. AEU-International Journal of Electronics and Communications, 85, pp.78-83.

Wang, J., Xu, L.J., Zhao, S., Guo, Y.X., and Wu, W., 2010. Compact quasielliptic microstrip lowpass filter with wide stopband. Electronics Letters, 46(20), pp.1384-1385.

Wei, F., Chen, L., and Shi, X.W., 2012. Compact lowpass filter based on coupledline hairpin unit. Electronics letters, 48(7), p.1.