A 3D LTE antenna for vehicular applications

A novel compact 3D antenna operating at LTE, GSM and UMTS frequency bands (790-2690 MHz) is proposed for vehicular applications. The antenna consists of a metal-sheet properly cut and shaped to fit an overall volume of 50×50×30 mm
³
. A Planar Inverted-F Antenna is designed to cover the lower frequency band (below 1GHz), while an integrated folded monopole adds higher frequency resonances. An elliptical-shape pin is connected to a 50Ω input port to improve impedance matching, mainly at the higher frequencies. Preliminary numerical simulations in terms of reflection coefficient and gain are here presented and discussed.