"

Cookies ussage consent

Our site saves small pieces of text information (cookies) on your device in order to deliver better content and for statistical purposes. You can disable the usage of cookies by changing the settings of your browser. By browsing our site without changing the browser settings you grant us permission to store that information on your device.

I agree, do not show this message again.

A low profile and wideband antenna with omnidirectional radiation for the sub-terahertz applications of 6G

MD. MUSHFIQUR RAHMAN1,* , SUJIT HALDER2,* , MD. ZULFIKER MAHMUD2, TOUHIDUL ALAM3,4, MOHAMMAD TARIQUL ISLAM5, LINI LEE1, ABDULLAH AL MAMUN6, MD. SHABIUL ISLAM1,*

Affiliation

  1. Centre for Advanced Devices and Systems, Faculty of Artificial Intelligence and Engineering, Multimedia University, Persiaran Multimedia, 63100 Cyberjaya, Selangor, Malaysia
  2. Department of CSE, Jagannath University, Dhaka 1100, Bangladesh
  3. Pusat Sains Angkasa, Institut Perubahan Iklim, Universiti Kebangsaan Malaysia, Selangor, Malaysia
  4. Dept. Of CSE, International Islamic University Chittagong, Kumira 4318, Bangladesh
  5. Department of Electrical, Electronic and Systems Engineering, Faculty of Engineering and Built Environment, Universiti Kebangsaan Malaysia, Selangor, Malaysia
  6. Department of Physics, University of Chittagong, Chattogram 4331, Bangladesh

Abstract

This paper proposes a low-profile two-element array antenna loaded with a matching circuit to achieve miniaturized wideband characteristics with omnidirectional radiation property for the Sub Terahertz applications of 6G. A single-element antenna gives a single resonance to a low-frequency region. When the array is formed, it exhibits two resonances in the low-frequency region with poor impedance matching. However, the loading of the matching circuit improves the matching of the first resonance and aids in generating a large bandwidth for the second resonance, where the gain is also improved substantially. The inset and matching structures are optimized to get the best antenna performance. The overall compact dimension of the antenna is 600 µm × 650 µm × 10 µm where the height is only 0.0034 of the operating wavelengths, and the width is only one-fifth of the operating wavelength at the center frequency of the low-frequency band. The numerical simulations are done with CST microwave studio software in the time domain. Simulation results show that the compact structure gives a percentage bandwidth of 17.13 % for the first resonance ranging from 92.3 GHz to 109.6 GHz and of 82.13 % for the second resonance ranging from 147.1 GHz to 352.1 GHz where |S11| is less than – 10 dB. Furthermore, the antenna shows a dumbbell-shaped radiation pattern in the E-plane and an omnidirectional radiation pattern in the H-plane for both resonances. Moreover, the cross-polarization levels in the H-plane for both resonances are recorded very low..

Keywords

Sub-terahertz applications, 6G technology, Compact, Low-profile, Wideband, Matching circuit, Omnidirectional radiation pattern.

Submitted at: Sept. 19, 2024
Accepted at: April 15, 2025

Citation

MD. MUSHFIQUR RAHMAN, SUJIT HALDER, MD. ZULFIKER MAHMUD, TOUHIDUL ALAM, MOHAMMAD TARIQUL ISLAM, LINI LEE, ABDULLAH AL MAMUN, MD. SHABIUL ISLAM, A low profile and wideband antenna with omnidirectional radiation for the sub-terahertz applications of 6G, Journal of Optoelectronics and Advanced Materials Vol. 27, Iss. 3-4, pp. 167-175 (2025)