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This paper presents a numerical simulation of a log-periodic antenna on an extended hemispherical lens. The overall performance of the antenna in terms of input impedance, radiation patterns, and radiation efficiency was studied and analyzed with the aid of a full-wave electromagnetic simulator. A hybrid method combining geometrical optics inside the lens and physical optics outside the lens was not...
This paper presents a numerical study of self-complementary antennas on substrate lenses made of high-permittivity dielectric material. Bowtie, logarithmically periodic, and logarithmic spiral antennas with the same outer and inner dimensions were selected for study, and their overall performances were compared in the terahertz band at frequencies up to 5.0 THz. The resonance and radiation characteristics...
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