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Printed Wideband Antenna for LTE-Band Automotive Applications

A low-profile printed antenna is proposed here for vehicular communications, covering wireless standards in a wide frequency range (698–2690 MHz) that includes the 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 reported here 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.