Design of Comb-Line Array Antenna for Low Sidelobe Level in Millimeter-Wave Band

IEEE Access

Sang-Hoon Lee¹  Dong-Wook Seo¹  Hyun Joon Lee²  Jae-Ho Lee²  Jang-Yeol Kim²  Jung-Hoon Oh²  In-Kui Cho² 

[1] Division of Electronics and Electrical Information Engineering/Interdisciplinary Major of Maritime AI Convergence, Korea Maritime and Ocean University, Busan, South Korea;Electronics and Telecommunications Research Institute (ETRI), Daejeon, South Korea;

关键词: Antenna array;    comb-line antenna;    low sidelobe;    microstrip antenna;    millimeter-wave;   

DOI  :  10.1109/ACCESS.2022.3169280

来源: DOAJ

【 摘 要 】

In this paper, a deformed radiating element is proposed to design a comb-line array antenna for low sidelobe levels in the millimeter-wave band. To design the comb-line array antenna with a low sidelobe level, the use of the wide radiating elements for a relatively large radiation conductance is required. However, the conventional rectangular radiating element has transverse current flows on it, resulting in undesirable transverse radiation conductance for cross-polarization. On the contrary, in the proposed radiating element, which is implemented by cutting obliquely the connection part to the feeding line from a rectangular element, the radiations from the transverse currents cancel each other, and low radiation conductance for cross-polarization and dominant radiation conductance for co-polarization are achieved. A 17-element linear comb-line array antenna with the sidelobe below −20 dB is designed and measured at 79 GHz. Using the proposed radiating elements, we obtained the sidelobe level of −21.9 dB in the array, but the array using the conventional radiating elements shows the sidelobe level of −16.9 dB. This letter demonstrates the availability of the proposed element for the easy and accurate design of the comb-line array antenna with the low sidelobe level.

【 授权许可】

Unknown