Low-profile terahertz radar based on broadband leaky-wave beam steering
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(Submitted version)
Date
2017
Authors
Murano, K.
Watanabe, I.
Kasamatsu, A.
Suzuki, S.
Asada, M.
Withayachumnankul, W.
Tanaka, T.
Monnai, Y.
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Journal Title
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Journal article
Citation
IEEE Transactions on Terahertz Science and Technology, 2017; 7(1):60-69
Statement of Responsibility
Kosuke Murano, Issei Watanabe, Akifumi Kasamatsu, Safumi Suzuki, Masahiro Asada, Withawat Withayachumnankul, Toshiyuki Tanaka, and Yasuaki Monnai
Conference Name
Abstract
We demonstrate short-range terahertz radar based on a leaky-wave antenna with a beam steering capability. As a proof of concept, we develop a microstrip-based periodic leakywave antenna driven by a vector network analyzer. By sweeping the frequency from235 to 325 GHz, beam steering from−23◦ to+15◦ across the broadside can be achieved with a nearly constant beam width of 4◦. Small target detection is demonstrated by locating a metal cylinder with a diameter of 12 mm placed 46–86 mm in front of the antenna with a mean error of 2.4 mm. The use of a leaky-wave antenna can pave the way for developing a low-loss, low-profile, and wide-aperture terahertz radar. Importantly, it can be integrated with a solid-state source and a detector. The proposed approach is particularly promising for use with emerging small devices such as drones or wearable devices, where millimeter-wave radar is not suitable in terms of the resolution and system footprint.
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Date of publication December 1, 2016; date of current version January 12, 2017.
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© 2016 IEEE