Micro-metamaterial antenna characteristics using microring embedded silver bars
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TECHNICAL PAPER
Micro-metamaterial antenna characteristics using microring embedded silver bars A. E. Arumona1,2,3 • A. Garhal4 • S. Punthawanunt5 • K. Ray6 • P. Youplao7 • P. Yupapin1,2 Received: 9 May 2020 / Accepted: 13 May 2020 Ó Springer-Verlag GmbH Germany, part of Springer Nature 2020
Abstract A unique micro-metamaterial antenna for light and microwave wavelength conversion is proposed, where the antenna has the form of a panda ring which consists of the mu negative metamaterial silver bars embedded at the microring center. The micro-metamaterial antenna characteristics are investigated, where the antenna resonance frequency and frequency range of 1.60 THz and 1–2.2 THz are achieved. The radiation pattern of the micro-metamaterial antenna is plotted, where the obtained gain and directivity of the antenna are - 8.13 dB. The optimum antenna radiation efficiency is 1 when the antenna has dissipative loss is neglected. The micro-metamaterial antenna can be used as a converter between light and microwave, which is useful for a wavelength converter device.
1 Introduction A metamaterial is a material that exhibits special properties of light when its geometry is artificially altered. In other words, the arrangement of the structure of a material at nanoscale gives rise to the observation of special properties of light. Metamaterials are classified into four distinct
& P. Yupapin [email protected] A. E. Arumona [email protected] 1
Computational Optics Research Group, Advanced Institute of Materials Science, Ton Duc Thang University, District 7, Ho Chi Minh City, Vietnam
2
Faculty of Applied Sciences, Ton Duc Thang University, District 7, Ho Chi Minh City, Vietnam
3
Division of Computational Physics, Institute for Computational Science, Ton Duc Thang University, Ho Chi Minh City 700000, Vietnam
4
Amity School of Engineering and Technology, Amity University Rajasthan, Jaipur, India
5
Faculty of Science and Technology, Kasem Bundit University, Bangkok 10250, Thailand
6
Amity School of Applied Sciences, Amity University Rajasthan, Jaipur, India
7
Department of Electrical Engineering, Faculty of Industry and Technology, Rajamangala University of Technology Isan Sakon Nakhon Campus, Sakon Nakhon 47160, Thailand
groups based on the permittivity (e), and permeability (l) of these materials. The first group of metamaterials is the Double Positive (DPS) which has e [ 0, and l [ 0. The second group is the epsilon negative (ENG) which has e \ 0, and l [ 0. The third group is the Double Negative (DNG) which has e \ 0, and l \0. The last group isthe mu negative (MNG) which has e [ 0, and l \ 0 (Fedotov 2017). Rezaeieh et al. (2015) designed a loop antenna that consists of metamaterial MNG unit cells. The electromagnetic region employed for the study is the microwave region. The frequency bandwidth is in the range of 0.64–1.1 GHz corresponding to the wavelength of 0.272–0.468 m. The gain of 3.2 dBi is achieved. Rezaeieh et al. (2017) design
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