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A 24 GHz microstrip antenna array with large space and narrow beamwidth
Author(s) -
Jia Yongtao,
Liu Ying,
Zhang Yu
Publication year - 2020
Publication title -
microwave and optical technology letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.304
H-Index - 76
eISSN - 1098-2760
pISSN - 0895-2477
DOI - 10.1002/mop.32190
Subject(s) - beamwidth , antenna (radio) , fan beam antenna , antenna array , antenna measurement , microstrip antenna , optics , acoustics , physics , patch antenna , antenna factor , telecommunications , engineering
Abstract A microstrip antenna array with large space and narrow beamwidth working at 24 GHz is presented in this paper. In some millimeter‐wave radar systems, it is often necessary for transmitting antenna with high gain and narrow beamwidth to avoid interference from other information. According to the theory of antenna array, when the number and spacing of the subarrays and the sidelobe level are given, the half‐power beamwidth can be basically determined. In previous studies, the subarray spacing of the transmitting antenna is usually taken as a dielectric wavelength λ g . In this paper, under the condition that the number of subarrays is given and no grating lobe is generated, the half power beamwidth is further narrowed by increasing the subarray spacing. The final subarray space of the 12 × 8 antenna array is 11.5 mm, that is, 1.68 dielectric wavelength ( λ g ), and the half power beamwidth of H‐plane is only 5.5°. The simulated and measured results are presented and discussed. Through processing and testing, it is proved that the antenna array has good performance and can be applied to 24 GHz automotive collision avoidance radar or 24 GHz perimeter security radar.