Abstract:
PURPOSE: An antenna is provided to obtain high isolation by attenuating a transmission signal which does not pass through an object. CONSTITUTION: A first antenna(2) and a second antenna(3) are vertically arranged with each other. A third antenna(4) and a fifth antenna(6) are symmetrical based on the plane formed by the first and second antennas. The third antenna and a fifth antenna are vertical to the first antenna. The inner cores of a feeding connector of the third and fifth antennas are arranged in the opposite direction. A fourth antenna(5) and a sixth antenna(7) are symmetrical based on the plane formed by the first and second antennas. The fourth antenna and the sixth antenna are horizontal to the first antenna.