Antenna device for vehicles, is mounted on electrically insulated plate which is used as signal coupler of two circuits of antenna switch connected to base of antenna

摘要

Base (10) of transmission and/or reception antenna (5) can be connected to antenna switch (15). The antenna switch has two filter circuits (20) comprised by respective capacitors (C1-C4), and inductors (L2,L3). The filter circuits filter signal of different frequency range. The antenna device is mounted on an electrically insulated plate (30) which is used as a signal coupler of the two circuits of the antenna switch. Two-dimensional coupling elements are arranged inside and outside of the electrically insulated plate, in each filter circuit of the antenna switch connected to the base of the transmission and/or reception antenna. The two-dimensional coupling elements are separated by an electrically insulated area.