LOW FREQUENCY TRANSMITTING ANTENNA

摘要

The present invention relates to a low frequency transmitting antenna in which a radiation efficiency is high and an additional matching circuit is unnecessary. The low frequency transmitting antenna is configured: a central pillar is installed in an antenna ground plate buried in the ground; four diagonal metal wires are placed in the form of a pyramid on an upper end of the central pillar; a rectangular closed loop is formed with four horizontal metal wires connecting predetermined points on the four diagonal metal wires; a vertical metal wire on one point of the rectangular closed loop is installed to feed the entire antenna, thereby minimizing the zero point of a gain pattern in a high angle direction of the antenna; a short-circuited metal wire is installed to be near the vertical metal wire to match an impedance of the antenna; and an insulator connecting the diagonal metal wire to the ground plate is contained.