In this letter, a 3D-antenna solution for automotive applications is presented. The proposed solution is formed by two independent antennas, perpendicularly placed inside a plastic cover with a shark-fin shape. The antennas, designed with low-

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A low-profile printed antenna is here proposed for vehicular communications, covering wireless standards in a wide frequency range (698-2690 MHz) that includes the LTE (Long Term Evolution) band. Multiple monopole antennas are printed on the same compact substrate easily embeddable under a shark-fin cover, and they are properly optimized to resonate in the considered frequency band. A tapered profile and a thin slot have been introduced to achieve a good impedance matching, especially at the higher frequencies. Numerical simulations and measurement results on a prototype are here reported in terms of reflection coefficient, gain and radiation pattern. The proposed wideband antenna is suitable for other wireless scenarios in addition to the automotive industry.

A low-profile and compact 3D antenna operating at LTE, GSM and UMTS frequency bands (790-2690 MHz) is proposed for a vehicular 2×2 MIMO system. The performance of the single 3D radiating element is here analyzed. Then, the two-antenna system performance is analyzed in terms of impedance matching, isolation and envelope correlation coefficient, highlighting the effect of some geometrical parameters such as inter-element distance and reciprocal orientation. Preliminary measured results are presented

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