AU - Mirsalehi, Mitra AU - Kavehvash, Zahra AU - Fardmanesh, Mehdi TI - Design of a wideband, high-gain and high-directivity THz Vivaldi antenna PT - JOURNAL ARTICLE TA - opsi JN - opsi VO - 26 VI - 0 IP - 0 4099 - http://opsi.ir/article-1-2189-en.html 4100 - http://opsi.ir/article-1-2189-en.pdf SO - opsi 0 ABĀ  - In this paper, a wideband Vivaldi antenna is designed for the frequency range of 0.5-3 THz and simulated by a software package based on the finite element method. The antenna has dimensions of 432µm × 400µm ×10.2µm, its substrate is quartz, and the conducting layers are made of gold. The designed antenna is highly directive; its directivity in the above mentioned frequency range is between the minimum of 4.53 dB and the maximum of 9.40 dB. Also, from simulation results, its maximum gain and efficiency were found to be 8.50 dB and 84.43%, respectively which make it superior to similar antennas reported in the literature. The proposed antenna can be used in THz imaging and spectroscopy to detect materials that have THz signatures in this region. CP - IRAN IN - LG - eng PB - opsi PG - 1161 PT - Research YR - 2020