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Your search keyword '"Lai, Jiexin"' showing total 20 results
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20 results on '"Lai, Jiexin"'

3. 3D Terahertz Antenna Measurement: A comparison between solid-state electronics and photomixing approaches

Author

Lai, Jiexin and Yang, Yang

Abstract

The terahertz (THz) spectrum (0.1–10 THz) is located between the infrared and microwave regimes, known as the THz gap. During the last decade, THz wave generation, detection, and manipulation (three key THz research directions) have been significantly advanced, taking advantage of the rapid development of solid-state circuits and photonics technologies.

Published
2024
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5. A 3-D Printed 140 GHz Multifocal Dielectric Transmitarray Antenna for 2-D Mechanical Beam Scanning

Author

Lai, Jiexin, Lv, Xiaojing, and Yang, Yang

Abstract

In this letter, a 3-D printed multifocal all-dielectric transmitarray antenna (TAA) is proposed for 2-D beam scanning at 140 GHz. Taking advantage of the TAA element phase shifting by varying incident angles, the proposed TAA can meet the phase compensation requirement for the feed beams from multiple ports with different incident angles. The genetic algorithm (GA) is employed to optimize the phase distribution at the sub-terahertz band. The measured 3 dB gain bandwidths of the proposed TAA are 14.3%. By mechanically rotating the feed horn, the multifocal TAA can realise a measured peak gain of 26.6 dBi at 140 GHz with a higher gain improvement of 12 dB and a ±30° beam-scanning range and 2.1 dB scan loss in E-plane, H-plane, and D-plane (diagonal-plane, φ = 45°). The proposed TAA demonstrates a broadband 2-D mechanical beam-scanning performance in the sub-terahertz band.

Published
2024
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