Antenna system operating method, involves modulating transmission signal digitally on carrier wave, generating ground wave with one antenna and generating sky wave with another antenna in quasi manner

摘要

The method involves modulating a transmission signal digitally on a carrier wave, and feeding antenna signals over supply currents. A ground wave is generated with an antenna (1) and a sky wave is generated with an antenna (2) in a quasi manner. The two antennas are arranged in a vertical manner. A phase shift is adjusted between one supply current for the antenna (1) and another supply current for the antenna (2). The relation of the maximum field strength of the ground wave to the sky wave is adjusted by different amplitudes of the supply currents. An independent claim is also included for an antenna system comprising two antennas.