| 摘要 |
<p>PURPOSE: To increase a communication area without making an apparatus complicated by a method wherein the communication area is ensured to be layer. CONSTITUTION: Since the communication-directivity central line of a transmitting antenna 201a and that of a receiving antenna 202a cross each other, their mutual communication areas are overlapped further, and an area 23a which can be transmitted and received is expanded. In addition, when an antenna interval is set large, a creeping operation to the side of the receiving antenna 202a from the transmitting antenna 201a is reduced, a receiving uplink area 22b is expanded, and a communication distance is extended far. Consequently, the communication area can be expanded only by selecting the arrangement and the direction of the antennas. In addition, by contriving an antenna mounting stand, it is possible to obtain the mobile-body discrimination apparatus and its communication method which are not influenced by a mounting position.</p> |
