TY - JOUR
T1 - Low-Profile Terahertz Radar Based on Broadband Leaky-Wave Beam Steering
AU - Murano, Kosuke
AU - Watanabe, Issei
AU - Kasamatsu, Akifumi
AU - Suzuki, Safumi
AU - Asada, Masahiro
AU - Withayachumnankul, Withawat
AU - Tanaka, Toshiyuki
AU - Monnai, Yasuaki
N1 - Publisher Copyright:
© 2016 IEEE.
PY - 2017/1
Y1 - 2017/1
N2 - 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 leaky-wave antenna driven by a vector network analyzer. By sweeping the frequency from 235 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.
AB - 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 leaky-wave antenna driven by a vector network analyzer. By sweeping the frequency from 235 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.
KW - Beam steering
KW - broadside radiation
KW - leaky-wave antennas (LWA)
KW - terahertz radar
KW - waveguide-to-microstrip couplers
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U2 - 10.1109/TTHZ.2016.2624514
DO - 10.1109/TTHZ.2016.2624514
M3 - Article
AN - SCOPUS:84999098109
SN - 2156-342X
VL - 7
SP - 60
EP - 69
JO - IEEE Transactions on Terahertz Science and Technology
JF - IEEE Transactions on Terahertz Science and Technology
IS - 1
M1 - 7762933
ER -