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Design of a wideband microstrip nanoantenna array

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Abstract

This paper presents the design of a logarithmic array of microstrip nano-antennas at terahertz frequencies. For applications in which small antennas are required, microstrip antennas are preferred. However, they have a narrow bandwidth. To overcome this problem in microstrip antennas, a log-periodic nanoantenna design is presented which exhibits a wide bandwidth and ultra-compact design. This antenna is smaller in size compared to log-periodic antennas in microwave bands and comparable and better radiation characteristics. The proposed Log-periodic microstrip nanoantenna array consists of seven patch elements on a dielectric layer and are fed directly by a feed line through the branch lines connected to each of the elements. Scaling factor, τ = 0.95 is considered for this design and inset feed is used. In this structure, the substrate has a relative dielectric constant of εr = 4.4 and a thickness of h = 800 nm. For good performance at high frequencies, gold is used for the design of the antenna. The considered operating frequency is 3.3 THz corresponding to a wavelength of 91 µm. Good impedance matching and a wide bandwidth of 800 GHz is obtained.

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Authors and Affiliations

  1. Department of Electrical and Computer Engineering, Science and Research Branch, Islamic Azad University, Tehran, Iran

    Maryam Shirzadian Gilan, Mohammad Naser-Moghaddasi & Mehdi Khatir

  2. School of Electrical and Computer Engineering, College of Engineering, University of Tehran, Tehran, Iran

    Jalil Rashed-Mohassel

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  1. Maryam Shirzadian Gilan
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  2. Jalil Rashed-Mohassel
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  3. Mohammad Naser-Moghaddasi
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  4. Mehdi Khatir
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Correspondence to Mohammad Naser-Moghaddasi.

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Shirzadian Gilan, M., Rashed-Mohassel, J., Naser-Moghaddasi, M. et al. Design of a wideband microstrip nanoantenna array. Opt Quant Electron 51, 132 (2019). https://doi.org/10.1007/s11082-019-1852-6

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