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Compact bidirectional circularly polarized dedicated short range communication antenna for on‐board unit vehicle‐to‐everything applications
Author(s) -
Rahman Nur A. A.,
Jamlos Mohd A.,
Jamlos Mohd F.,
Soh Ping J.,
Bahari Norfatihah,
Hossain Toufiq M.
Publication year - 2020
Publication title -
international journal of rf and microwave computer‐aided engineering
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.335
H-Index - 39
eISSN - 1099-047X
pISSN - 1096-4290
DOI - 10.1002/mmce.22174
Subject(s) - turnstile antenna , antenna (radio) , phase (matter) , phase difference , rotation (mathematics) , physics , optics , axial ratio , dipole , telecommunications , dipole antenna , substrate (aquarium) , electrical engineering , coaxial antenna , computer science , engineering , microstrip antenna , geology , quantum mechanics , artificial intelligence , oceanography
This article presents a newly circularly polarized (CP) antenna for V2X's dedicated short range communications applications. Its CP characteristic is enabled by a 70 Ω sequential phase feeding network and sequential rotation technique designed on top of the substrate. It has features of ≈90° phase difference in sequence between ports of S 21 = 2.4°, S 31 = −87°, S 41 = −180°, and S 51 = −276°, resulting in a 2.19 dB axial ratio centered at 5.9 GHz. The length of the SP feeding network to each ports designed in the different form of meander lines are the key to control the generated phase at the center frequency It also contributes to the smaller final size of 0.59 λ × 0.59 λ . The proposed antenna operated from 5.850 to 5.925 GHz with a gain between 4 and 6 dBi. The gains are radiated in bidirectional mode due to the presence of the complimentary dipoles located on the opposite side of the substrate. These features indicate the suitability of the proposed antenna in compliance to the ITS‐G5 OBU V2X standard.