Compact Rotman lens-fed slot array antenna with low sidelobes

被引：16
作者：
Liu, Yi [1 ]
Yang, Hu [1 ]
Jin, Zusheng [2 ]
Zhao, Fei [3 ]
Zhu, Jiang [1 ]
机构：
[1] Natl Univ Def Technol, Coll Elect Sci & Engn, Changsha 410073, Hunan, Peoples R China
[2] EMC Res & Measurement Ctr Navy, Shanghai 200235, Peoples R China
[3] Southwest Elect & Telecommun Technol Res Inst, Chengdu 610041, Sichuan, Peoples R China
来源：
IET MICROWAVES ANTENNAS & PROPAGATION | 2018年 / 12卷 / 05期
关键词：
slot antenna arrays; lens antennas; antenna feeds; substrate integrated waveguides; multibeam antennas; antenna radiation patterns; array signal processing; frequency response; compact Rotman lens-fed slot array antenna; substrate-integrated waveguide technology; SIW technology; microstrip Rotman lens; compact multibeam antenna; double-stepped coupling slots; rectangular transverse coupling slot; coupling power; low-sidelobe application; radiating part; beam-forming network; frequency; 10; GHz; edge beams; central beam; measured radiation patterns; azimuthal plane; WAVE-GUIDE; MICROSTRIP; DESIGN; PHASE;
D O I：
10.1049/iet-map.2017.0466
中图分类号：
TM [电工技术]; TN [电子技术、通信技术];
学科分类号：
0808 ; 0809 ;
摘要：
A slot array in substrate-integrated waveguide (SIW) technology fed by a microstrip Rotman lens is proposed. This compact multibeam antenna is designed in two layers using a novel transition based on double-stepped coupling slots on the broad wall of SIWs. Compared with a rectangular transverse coupling slot, this transition is broadband and its coupling power can be controlled for low-sidelobe applications. The radiating part is a 10x10 slot array and the beam-forming network can generate seven beams with good coverage from -30 degrees to 30 degrees in the azimuthal plane. To validate the proposed concept, an antenna prototype is implemented at 10GHz. The frequency response and measured radiation patterns are in good agreement with simulated results provided by full wave simulation software. Experimental results show that the sidelobe level is lower than -21dB for the central beam in both H and E planes and better than -18dB for the edge beams.
引用
收藏
页码：656 / 661
页数：6
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