Low Sidelobe Design of Microstrip Comb-Line Array Antenna Using Deformed Radiating Elements in the Millimeter-Wave Band

被引:11
作者
Lee, Jae-In [1 ]
Lee, Jae-Ho [2 ]
Lee, Sang-Hoon [1 ]
Seo, Dong-Wook [1 ]
机构
[1] Korea Maritime & Ocean Univ, Interdisciplinary Major Maritime AI Convergence, Busan 49112, South Korea
[2] Elect & Telecommun Res Inst, Daejeon 34129, South Korea
基金
新加坡国家研究基金会;
关键词
Microstrip antenna arrays; Microstrip antennas; Microstrip; Millimeter wave communication; Linear antenna arrays; Millimeter wave radar; Antenna measurements; Antenna array; comb-line antenna; low sidelobe; microstrip antenna; millimeter wave;
D O I
10.1109/TAP.2022.3184555
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
This communication presents a microstrip comb-line array antenna for the low sidelobe level (SLL) in the millimeter wave. As the width of the conventional stub-shaped radiating element becomes wider, not only the longitudinal current but also the transverse current increases; the longitudinal and transverse currents generate the co- and cross-polarized radiation, respectively. To reduce the transverse current flows on the large-width radiating element, the width of the connecting part with the feeding line in the radiating element is narrowed. In addition, the transverse current can be further reduced by adding a notch on the top of the radiating element. These two deformed radiating elements are proposed and used to design 18-element comb-line array antennas according to the array design procedure based on the radiation conductance. The array antennas were designed for the SLL of-20 dB at 79 GHz. The prototypes are fabricated and the antenna performance was measured. From the measurement results, the comb-line antenna composed only of the conventional stub-shaped elements shows the SLL of about-16.58 dB, whereas the array antenna using the proposed elements has the SLL of-19.4 dB. This communication demonstrates the feasibility of the proposed elements for low SLL, through analysis and measurement.
引用
收藏
页码:9930 / 9935
页数:6
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