Abstract
A low profile, high gain 32 × 64-slot array antenna with unequal beamwidths in the E- A nd H-planes and low sidelobes is proposed for vehicular applications in the 71-81 GHz band. The antenna is composed of 512 (16 × 32) 2 × 2-slot subarrays arranged with equal spacing and excited by a nonuniform corporate-feed-network. A two dimensional amplitude-tapering (complying with Taylor distribution) is used to achieve the low sidelobe levels (SLLs). Combined with the different dimensions of the array, the sidelobes and the beamwidths in the E- A nd H-planes are independently controlled. A prototype slotted waveguide array is fabricated to verify the array properties. Measurements show that the matching of the array is better than-14 dB over the entire bandwidth. The first SLL is lower than-18.9 dB/-24 dB with the maximum 3-dB beamwidth of 2.3°/1.3° in the E-/H-plane, respectively. The peak gain of over 39.4 dBi and the cross-polarization discrimination (XPD) of below-36.2 dB are also achieved. The demonstrated features of high gain, low SLL, and independent controllability of the beam in the E- A nd H-planes are most desirable for vehicular communications and radars.
Original language | English |
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Article number | 8440768 |
Pages (from-to) | 10574-10582 |
Number of pages | 9 |
Journal | IEEE Transactions on Vehicular Technology |
Volume | 67 |
Issue number | 11 |
Early online date | 20 Aug 2018 |
DOIs | |
Publication status | Published - 1 Nov 2018 |
Keywords
- 2-D amplitude-tapering
- high gain
- low sidelobe
- Slotted waveguide array
ASJC Scopus subject areas
- Automotive Engineering
- Aerospace Engineering
- Applied Mathematics
- Electrical and Electronic Engineering