Abstract
An automotive concept for vehicular communications is proposed that utilizes the potential of the roof area for antennas. Antennas are distributed in cavities and on shelves in the center and on the front and rear roof ends. The arrangement of antennas on the roof allows better radiation to the front and back of automobiles than shark-fins and single cavities. Combining several modules provides space for further antennas, sensors, and integrated front-ends, as well as better spatial separation for multiple-input multiple-output (MIMO) arrays beyond 5G, and cooperative connected and automated driving. A prototype was developed and built into a car chassis. The measured data were analyzed and evaluated in the view of coverage for vulnerable road users and on correlation for the MIMO.
Highlights
Cooperative, connected and automated driving and communications beyond 5G will further increase the demand for vehicular antennas
Several investigations conclude that automotive antenna systems benefit from spatial diversity, i.e. placing antennas further apart
Contribution — We propose to turn car roofs into distributed antenna systems
Summary
Cooperative, connected and automated driving and communications beyond 5G will further increase the demand for vehicular antennas. Conformal antenna modules at the front of the roof [29], [30] were shown to increase coverage towards vulnerable road users [31] and they leave room to include optical cameras for automated driving cars. Three antenna modules are combined in the car roof (Fig. 1a).
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