A Microwave Bandstop Filter Using Defected Microstrip Structure

Authors: H. Elftouh, N. T. Amar, M. Aghoutane, M. Boussouis

Abstract:

In this paper, two bandstop filters resonating at 5.25 GHz and 7.3 GHz using Defected Microstrip Structure (DMS) are discussed. These slots are incorporated in the feed lines of filters to perform a serious LC resonance property in certain frequency and suppress the spurious signals. Therefore, this method keeps the filter size unchanged and makes a resonance frequency that is due to the abrupt change of the current path of the filter. If the application requires elimination of this band of frequencies, additional filter elements are required, which can only be accomplished by adding this DMS element resonant at desired frequency band rejection. The filters are optimized and simulated with Computer Simulation Technology (CST) tool.

Keywords: Defected microstrip structure, microstrip filters, passive filter.

Digital Object Identifier (DOI): doi.org/10.5281/zenodo.1127388

References:

[1] Jun-Seok Park, Kookmin University, “An Equivalent Circuit and Modeling Method for Defected Ground Structure and Its Application to the Design of Microwave Circuits’’, Microwave journal, November 1, 2003.
[2] Rahman, M. and Stuchly, M. A., “Transmission line-periodic circuit representation of planar microwave photonic bandgap structures,’’ Microw. Opt. Technol. Lett., Vol. 30, 15-19, Jul. 2001.
[3] Yang, F. and Rahmat-Samii, Y., “Reflection phase characterization of an electromagnetic band-gap (EBG) surface,’’ in Proc. IEEE AP-S Dig., Vol.3, 744-747, June 2002.
[4] Yang, F. and Rahmati-Samii, Y., “Microstrip antennas integrated with electromagnetic band gap structures: a low mutual coupling design for array applications,’’ IEEE Trans. Antennas and Propagation, Vol. 51, 2936-2946, Oct. 2003.
[5] Kim, C.-S., J.-S. Park, D. Ahn, and J.-_B. Lim, “A novel 1D periodic Defected Ground Structure for planar circuits,’’ IEEE Microwave Guided wave letters, Vol.10, No. 4, 131-133, 2000.
[6] M. Kazerooni, N.P. Gandji, A. Cheldavi, and M. Kamarei, “A New Microwave Bandstop Filter Using Microstrip Structure (DMS),’’ Progress In Electromagnetics Research Symposium Proceedings, Moscow, Russia, August 18-21, 697-699, 2009.
[7] M. Kazerooni, Dr. A. Cheldavi, and M. Kamarei, “Comparing the performance of defected Microstrip Structures (DMS) and Defected Ground Structure (DGS) in microstrip miniature circuits,’’ Iranian Conference on Electrical Engineering, Volume 5, Communication field.
[8] Elftouh, H., N. A. Touhami, M. Aghoutane, S. El Amrani, A. Tazon, and M. Boussouis, “Miniaturized microstrip patch antenna with defected ground structure,” Progress In Electromagnetics Research C, Vol. 55, 25–33, 2014.
[9] S. R. Hosseini, R. Sarraf Shirazi, and Gh. Moradi, “A Novel Defect Microstrip Structure (DMS) Coupled Line Band Pass Filter in C Band,’’ Progress In Electromagnetics Research Symposium Proceedings, Moscow, Russia, August 19-23, 2012.
[10] Susanta Kumar Parui, Somdotta Roy Choudhury, A. Roy, L. Murmu, Santanu Das, “Bandstop Filtering Characteristics of a New Spiral Defected Microstrip Structure (DMS)’’, International Symposium on Devices MEMS, Intelligent Systems & Communication (ISDMISC) 2011.