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- Title
Magneto-electric dipole antenna array for 77 GHz automotive radar.
- Authors
Dinuo Bu; Shi-Wei Qu
- Abstract
A 1 x 4 magneto-electric dipole (ME dipole) antenna array for 77 GHz automotive radar is proposed. The ME dipole is fed by a fork-shaped microstrip line coupling through a dog-bone slot. To meet the requirements aimed at automotive radar applications, the beamwidths of the proposed antenna are well-designed. Specially, a method of adding passive elements on both sides of the array is proposed to increase the 3 dB beamwidth from ±34° to ±52° in azimuth. Additionally, in elevation, a 3 dB beamwidth of ±10° is achieved by designing the spacing between array elements. Moreover, based on low-loss printed circuit board substrates, radiation efficiency of the proposed array can reach approximately 90% at 77 GHz. Furthermore, a 4 x 4 array is established by arranging four 1 x 4 subarrays spacing 1.95 mm (half a free-space wavelength at 77 GHz) to study the interactions between subarrays for multiple input multiple output scenarios. A 1 x 4 and a 4 x 4 antenna prototypes are fabricated and measured to validate the correctness of this design. The results show that the proposed antenna is an eligible candidate for the medium- and short-range automotive radars.
- Subjects
DIPOLE array antennas; ROAD vehicle radar; ANTENNAS (Electronics); AUTOMOTIVE electronics; MICROSTRIP transmission lines
- Publication
IET Microwaves, Antennas & Propagation (Wiley-Blackwell), 2024, Vol 18, Issue 2, p96
- ISSN
1751-8725
- Publication type
Article
- DOI
10.1049/mia2.12445