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- W4200275413 abstract "A metallic waveguide transmitarray antenna (MWTA) is proposed to attain dual-band multibeams with high gain in the terahertz (THz) range, which is realized by independently controlling the phases of the two bands with orthogonal polarizations simultaneously. The phase distribution of each polarization on the MWTA for attaining the corresponding multibeam radiation pattern is calculated by using the Gerchberg–Saxton algorithm based on Fresnel diffraction theory. Furthermore, the phase delay of each unit cell is adjusted by varying the waveguide dimension to achieve the corresponding phase distributions. As a proof of concept, a dual-band MWTA with a diameter of 48 mm is designed and simulated to transform plane waves into triple beams at 0.14 THz and dual beams at 0.1 THz, respectively. Their peak gains are ∼30 and ∼28 dBi and the aperture efficiencies are 67% and 56%, respectively. Their 1 dB gain bandwidths can reach 10 GHz (136.5–146.5 GHz) and 11 GHz (94.7–105.6 GHz), respectively. The measured far-field results agree well with the simulations. The proposed dual-band THz antennas are very promising for applications in wireless and satellite communications." @default.
- W4200275413 created "2021-12-31" @default.
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- W4200275413 date "2021-12-20" @default.
- W4200275413 modified "2023-09-23" @default.
- W4200275413 title "Metallic waveguide transmitarrays for dual-band multibeam terahertz antennas" @default.
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- W4200275413 doi "https://doi.org/10.1063/5.0074555" @default.
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