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http://doi.org/10.22214/ijraset.2020.5278
May 2020
International Journal for Research in Applied Science & Engineering Technology (IJRASET) ISSN: 2321-9653; IC Value: 45.98; SJ Impact Factor: 7.429 Volume 8 Issue V May 2020- Available at www.ijraset.com
Design of Metamaterial Antenna for Dual Band Operation J. Deepa1, S. Femina Nilofar2, R. Ilakkiya3, S. Asuvathi 4, N. Madhumitha5 1
Assistant Professor,
2, 3, 4
UG Scholars, Department of ECE, K. Ramakrishnan College of Technology, Trichy, Tamilnadu, India
Abstract: A compact dual band antenna is proposed for various wireless applications. The antenna consists of a rectangular patch with metamaterial inspired ELC ground plane. The antenna is printed on a FR-4 substrate which has a dielectric constant of 4.4.The size of the proposed antenna is 23x12.7x1.6 mm3.The antenna is fed by a 50 ohm microstrip line feed. The antenna resonates at 3.5 GHz and 5.4 GHz which is suitable for WiMAX and WLAN applications. Keywords: Dualband ;ELC; metamaterial; WiMAX; WLAN. I. INTRODUCTION In recent scenarios, metamaterial element emerges for improving the performance of antenna. Veselago made the first theoretical prediction on the existence of metamaterials which could show negative permeability and negative permittivity characteristics [1]. Metamaterials produces artificial electromagnetic properties that can be used to enhance the new era in microwave devices [2]. ELC based metamaterial element is used to improve the performance of the antenna such as dual band antenna design [3]. Since multiband antennas are in compact size and cost efficient, they are commonly used in wireless devices [4]. Many design techniques for multiband antenna design have been developed. By using metamaterial structure, dualband and antenna miniaturization have been achieved [4]. In order to improve the performance of the antenna metamaterial embedded antenna were used due to their unprecedented electromagnetic properties [5].In this paper, metamaterial element ELC based antenna is proposed for obtaining multiband and 84% of antenna miniaturization. II. ANTENNA DESIGN The configuration 1 is a typical rectangular radiating patch. FR4 substrate is used for antenna design, having dielectric constant of 4.4.In the configuration 2 the new metamaterial element known as Electric Field Coupled Resonator (ELC) has been introduced in the ground plane. This alters the traditional ground plane resonance characteristics and provides better impedance matching and dual band resonance characteristics.
Fig 1: Design steps of the proposed antenna
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International Journal for Research in Applied Science & Engineering Technology (IJRASET) ISSN: 2321-9653; IC Value: 45.98; SJ Impact Factor: 7.429 Volume 8 Issue V May 2020- Available at www.ijraset.com
Fig 2: Top view and bottom view of proposed antenna. Table 1: Dimensions of the proposed antenna PARAMETERS DIMENSIONS(mm) Ls 23 Lc 8 Lf 10.3 Lp 12.7 Wp,Ws 12.8 W1 1.5 W2 5 T 2
Fig 3: Configuration 1.
Fig 4: Configuration 2.
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International Journal for Research in Applied Science & Engineering Technology (IJRASET) ISSN: 2321-9653; IC Value: 45.98; SJ Impact Factor: 7.429 Volume 8 Issue V May 2020- Available at www.ijraset.com III. SIMULATION AND RESULT The simulated reflection co-efficient (S11) dB of the configuration 1 is shown in fig 5. It shows that the conventional rectangular patch antenna does not offer good impedance matching. The introduction of ELC in the ground plane (fig 6 ) offers a dual resonant frequencies of 3.5 GHz and 5.40 GHz.
Fig 5:Simulated S (dB) of config 1.
Fig 6:Simulated S (dB) of config 2. IV. RADIATION PATTERN
Fig 7(a):Radiation pattern of config 1.
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International Journal for Research in Applied Science & Engineering Technology (IJRASET) ISSN: 2321-9653; IC Value: 45.98; SJ Impact Factor: 7.429 Volume 8 Issue V May 2020- Available at www.ijraset.com
Fig 7(b):Radiation pattern of config 2. Figures 7(a) and 7(b) depicts the E-plane and H-plane radiation patterns of the proposed antenna at 2.1 GHz, 3.51 GHz respectively. The proposed antenna covers the desired directions.
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