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Design of a Broad Band – Stop Filter with Metamaterial as Defective Ground System

Md. Jubaer Alam 1*, Firuz Ahamed Nahid 1, Md. Turiqul Islam 1.
Department of EEE, IUBAT-International University of Business Agriculture and
Technology, Dhaka, Bangladesh
*Corresponding author: E-mail: jubaer.alam@iubat.edu

ABSTRACT: In this article, a defected ground structure (DGS) is introduced to design a broad bandstop filter to adjust the resonating characteristics by varying the dimension of the structure. The proposed antenna is embedded into a 50Ω microstrip framework. FR-4 (Lossy) is used as a substrate to design the proposed broad band-stop filter which has a succinct structure. The attainment of the antenna is explored both integrally and experimentally. Here Complementary Split Ring Resonator (CSRR) is introduced in the ground layer. It has been monitored that the level of rejection of the filter in the stopband region keeps on going with the introduction of CSRR. This filter is advisable for Xband applications especially on 5.9 to 11.3GHz. The Nicolson-Ross-Weir approach has been applied at the filtering frequency. The effective electromagnetic parameters retrieved from the simulation of the S-parameters imply that metamaterial antenna shows negative refraction bands. This indicates that the proposed antenna has behavior to justify the obligation as a Left Handed medium.

KEYWORDS: Band-stop filter, Defected ground plane, Left-handed medium Band-stop filter, Defected ground plane, Left-handed medium.

Introduction
After getting the commercial authorization from the Federal Communication Commission (FCC) in February 2002, Ultra-wideband (UWB) applications had become very popular at home and abroad (Yin et al., 2008). But this UWB system has to go through probable interferences for WiMax, WLAN and RFID. Thus the use of RF components that operate in multiple bands has become important to handle this complexity. A lot of researches has been made on the development of filter technology. In today’s world, one of the most essential parameters is confinement among channels in a particular bandwidth. Despite avoiding possible interferences in a system, Band-stop filter (BSF) is one of the competent arrangements to notify this problem by combining them with the system. In progression, a lot of researches has been done to flourish different kinds of BSF (Jiang et al., 2016).

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