ANTENNA SYSTEM

An antenna system includes a glass antenna that is disposed in window glass that is installed in a window opening that is formed in a metal body of a vehicle, wherein the glass antenna is to receive a radio wave in a MF band or in a LF band; an in-vehicle antenna that is disposed at an inner side of the vehicle compared to the metal body of the vehicle, wherein the in-vehicle antenna is positioned in a vicinity of the glass antenna; and a canceler to cancel a received signal of the in-vehicle antenna in a received signal of the glass antenna. A shortest distance between the glass antenna and the in-vehicle antenna is less than or equal to 500 mm, for example. The in-vehicle antenna is disposed so that a longitudinal direction of the in-vehicle antenna matches that of the glass antenna, for example.