TY - JOUR
T1 - Highly integrated beam scanning groove gap waveguide leaky wave antenna array
AU - Cao, Jianyin
AU - Wang, Hao
AU - Tao, Shifei
AU - Mou, Shanxiang
AU - Guo, Yongxin
PY - 2021/8
Y1 - 2021/8
N2 - In this communication, a novel 2-D beam scanning antenna array is designed and fabricated in metallic 3-D printed technology with high integration and reduced fabrication complexity in millimeter waves. The array is composed of four leaky wave antennas and a Butler matrix based on groove gap waveguide (GWG) technology. One dimension of the beam scanning performance is realized by moving one row of pins along the groove based on the GWG concept. Meanwhile, the sidelobe levels of the radiation patterns are reduced to −20 dB by controlling the height and distance of pins along groove. The beam direction of the low sidelobe leaky wave antenna changes from 110◦ to 140◦, while the frequency shifts from 25 to 35 GHz. Another dimension of the beam scanning capability is realized with the Butler matrix in groove GWGs. The design of this Butler matrix is based on the coupling between multilayered groove GWGs. By this means, the low sidelobe leaky wave antennas are connected directly to the Butler matrix with no more transition structures. The main beam direction of the antenna array shifts from −41◦ to 41◦, when the exciting ports change in order. The simulated and measured port isolations are lower than −15 dB over the frequency band of 27-35 GHz, and they match well with each other. © 2020 IEEE. Personal use is permitted, but republication/redistribution requires IEEE permission.
AB - In this communication, a novel 2-D beam scanning antenna array is designed and fabricated in metallic 3-D printed technology with high integration and reduced fabrication complexity in millimeter waves. The array is composed of four leaky wave antennas and a Butler matrix based on groove gap waveguide (GWG) technology. One dimension of the beam scanning performance is realized by moving one row of pins along the groove based on the GWG concept. Meanwhile, the sidelobe levels of the radiation patterns are reduced to −20 dB by controlling the height and distance of pins along groove. The beam direction of the low sidelobe leaky wave antenna changes from 110◦ to 140◦, while the frequency shifts from 25 to 35 GHz. Another dimension of the beam scanning capability is realized with the Butler matrix in groove GWGs. The design of this Butler matrix is based on the coupling between multilayered groove GWGs. By this means, the low sidelobe leaky wave antennas are connected directly to the Butler matrix with no more transition structures. The main beam direction of the antenna array shifts from −41◦ to 41◦, when the exciting ports change in order. The simulated and measured port isolations are lower than −15 dB over the frequency band of 27-35 GHz, and they match well with each other. © 2020 IEEE. Personal use is permitted, but republication/redistribution requires IEEE permission.
KW - 2-D beam scanning
KW - 3-D printed technology
KW - Gap waveguide (GWG)
KW - Leaky wave antenna
KW - Millimeter wave (mmW)
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U2 - 10.1109/TAP.2020.2995470
DO - 10.1109/TAP.2020.2995470
M3 - RGC 21 - Publication in refereed journal
SN - 0018-926X
VL - 69
SP - 5112
EP - 5117
JO - IEEE Transactions on Antennas and Propagation
JF - IEEE Transactions on Antennas and Propagation
IS - 8
ER -