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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, Low Sidelobe Level, Millimeter-wave band, Radiating element, feeding line, millimeter wave(mmWave)
This work is distributed under the term of Creative Commons License (CCL)
(CC BY NC ND)
(CC BY NC ND)
