| 摘要 |
An array antenna is composed of an antenna section, adaptive transmission sections 3-1 to 3-M, and a transmission antenna weight-producing section 4. The antenna section has antenna elements 2-11 to 2-MN arranged linearly on each of sides or sectors of M in a polygon. The adaptive transmission sections form a directional pattern having a gain in the direction of a desired signal for each sector and send a desired signal. The transmission antenna weight-producing section produces transmission antenna weights of M for each sector. A directional pattern having a high transmission gain roughly proportional to the number of antenna elements near a direction vertical to a straight line can be formed.
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