TY - GEN
T1 - Millimeter-wave Slot Array Antenna with Low Sidelobe Levels for Foreign Object Debris
AU - Chen, Jianhong
AU - Jin, Cheng
AU - Kong, Lingwen
AU - Zhang, Binchao
AU - Lv, Qihao
AU - Zhang, Pengyu
AU - Tian, Buning
AU - Han, Hangcheng
N1 - Publisher Copyright:
© 2021 IEEE.
PY - 2021
Y1 - 2021
N2 - A methodology of designing an E-band ridge waveguide 48 × 48 slot array antenna with low sidelobe levels (SLLs), high gain and wide bandwidth characteristics is proposed in this paper. A 2 × 2 cavity-backed slot subarray acts as the unit cell of the array which consists of three layers. The top metal layer contains two radiating slots with different sizes to achieve wide bandwidth. The intermediate layer contains the back cavity and coupling slot and the third layer is the ridge waveguide with a metal step, so that the electromagnetic wave can be better transmitted through the coupling hole to the back cavity in the second layer. The array antenna is composed of 576 (24 × 24) unit cells with equal space and excited by a nonuniform corporate-feed-network. The SLLs are suppressed by the Taylor amplitude-tapering distribution, which is implemented by the unequal power dividers. It should be noted that we adopt a special feeding network topology and a large power distribution ratio to achieve the Taylor distribution because the array is composed of 576 unit cells, the number of which is not the n th power of 2. Simulation results of the array antenna show the-10 dB impedance bandwidth is from 70 to 77GHz, the peak gain is up to 41.6dBi and the first SLL is lower than-21 dB. In addition, the grating lobes around 40 degrees have also been suppressed to a certain extent. The antenna proposed in this paper is competitive for foreign object debris applications because of its wide bandwidth, narrow beamwidth, high peak gain and low SLLs.
AB - A methodology of designing an E-band ridge waveguide 48 × 48 slot array antenna with low sidelobe levels (SLLs), high gain and wide bandwidth characteristics is proposed in this paper. A 2 × 2 cavity-backed slot subarray acts as the unit cell of the array which consists of three layers. The top metal layer contains two radiating slots with different sizes to achieve wide bandwidth. The intermediate layer contains the back cavity and coupling slot and the third layer is the ridge waveguide with a metal step, so that the electromagnetic wave can be better transmitted through the coupling hole to the back cavity in the second layer. The array antenna is composed of 576 (24 × 24) unit cells with equal space and excited by a nonuniform corporate-feed-network. The SLLs are suppressed by the Taylor amplitude-tapering distribution, which is implemented by the unequal power dividers. It should be noted that we adopt a special feeding network topology and a large power distribution ratio to achieve the Taylor distribution because the array is composed of 576 unit cells, the number of which is not the n th power of 2. Simulation results of the array antenna show the-10 dB impedance bandwidth is from 70 to 77GHz, the peak gain is up to 41.6dBi and the first SLL is lower than-21 dB. In addition, the grating lobes around 40 degrees have also been suppressed to a certain extent. The antenna proposed in this paper is competitive for foreign object debris applications because of its wide bandwidth, narrow beamwidth, high peak gain and low SLLs.
UR - http://www.scopus.com/inward/record.url?scp=85126395169&partnerID=8YFLogxK
U2 - 10.1109/PIERS53385.2021.9694908
DO - 10.1109/PIERS53385.2021.9694908
M3 - Conference contribution
AN - SCOPUS:85126395169
T3 - Progress in Electromagnetics Research Symposium
SP - 1224
EP - 1227
BT - 2021 Photonics and Electromagnetics Research Symposium, PIERS 2021 - Proceedings
PB - Institute of Electrical and Electronics Engineers Inc.
T2 - 2021 Photonics and Electromagnetics Research Symposium, PIERS 2021
Y2 - 21 November 2021 through 25 November 2021
ER -