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Journal Article
Design of Comb-Line Array Antenna for Low Sidelobe Level in Millimeter-Wave Band
- Authors
- Jae-Ho Lee, Sang-Hoon Lee, Hyun Joon Lee, Jung-Hoon Oh, Jang-Yeol Kim, In-Kui Cho, Dong-Wook Seo
- Issue Date
- 2022-05
- Citation
- IEEE Access, v.10, pp.47195-47202
- ISSN
- 2169-3536
- Publisher
- IEEE
- Language
- English
- Type
- Journal Article
- Abstract
- 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.
- KSP Keywords
- 79 GHz, Array antenna, Co-polarization, Cross polarization(CP), Line array, Millimeter-wave band, Radiating Element(RE), feeding line, low sidelobe level, millimeter wave(mmWave)
This work is distributed under the term of Creative Commons License (CCL)
(CC BY NC ND)
(CC BY NC ND)
