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- W4310281060 abstract "Focus scanning is critically important in many terahertz (THz) imaging and sensing applications. A traditional single focusing transmitarray can achieve a good focus when the source is on-axis but moving the source off-axis produces a significant aberration. This paper presents a novel approach to reducing coma in off-axis scanning in the THz region. Here, a dual transmitarray solution is proposed, in which a transmitarray with an optimized phase profile is placed behind a regular phase profile transmitarray. A linearly polarized, dual-transmitarray antenna was fabricated for validation, and the focusing performances were experimentally characterized. The measured results are in good agreement with the theoretical ones. The generated spot of the dual-transmitarray antenna remains focused on an angle up to 50deg, with a -3 dB spot size of less than 4 mm at 290 GHz. The measured near-field sidelobes are all below -10 dB within the whole scanning range." @default.
- W4310281060 created "2022-11-30" @default.
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- W4310281060 date "2022-11-24" @default.
- W4310281060 modified "2023-09-27" @default.
- W4310281060 title "Spot Focusing Coma Correction by Linearly Polarized Dual-Transmitarray Antenna in the Terahertz Region" @default.
- W4310281060 doi "https://doi.org/10.48550/arxiv.2211.13867" @default.
- W4310281060 hasPublicationYear "2022" @default.
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