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International Journal of Antennas and Propagation
Volume 2016, Article ID 5826957, 8 pages
Research Article

Minimum Lens Size Supporting the Leaky-Wave Nature of Slit Dipole Antenna at Terahertz Frequency

1Department of Electrical and Computer Engineering, Ajou University, Suwon, Republic of Korea
2Division of Computational Physics, Institute for Computational Science and Faculty of Electrical-Electronics Engineering, Ton Duc Thang University, Ho Chi Minh City, Vietnam
3Department of Electrical and Computer Engineering, POSTECH, Pohang, Republic of Korea

Received 9 May 2016; Revised 19 August 2016; Accepted 14 September 2016

Academic Editor: Shih Yuan Chen

Copyright © 2016 Niamat Hussain et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


We designed a slit dipole antenna backed by an extended hemispherical silicon lens and investigated the minimum lens size in which the slit dipole antenna works as a leaky-wave antenna. The slit dipole antenna consists of a planar feeding structure, which is a center-fed and open-ended slot line. A slit dipole antenna backed by an extended hemispherical silicon lens is investigated over a frequency range from 0.2 to 0.4 THz with the center frequency at 0.3 THz. The numerical results show that the antenna gain responses exhibited an increased level of sensitivity to the lens size and increased linearly with increasing lens radius. The lens with the radius of 1.2 is found to be the best possible minimum lens size for a slit dipole antenna on an extended hemispherical silicon lens.