| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide an antenna device capable of designing an antenna with a simple structure at low costs. <P>SOLUTION: In an antenna device 1A, waveguide elements 21A, 22A, a twin loop radiator 10A and reflective elements 41A to 46A are attached to an antenna arm 51A in this order. For example, the antenna device 1A operates as a twin loop Yagi type antenna. All reflective elements 41A to 46A, the twin loop radiator 10A and waveguide elements 21A, 22A of the antenna device 1A are formed into a round bar shape. Therefore a wind receiving area is reduced in the antenna device 1A. These round bar-shaped elements are formed of Al pipes. The gain of the antenna device 1A can be enhanced by increasing the number of waveguide elements 21A, 22A. <P>COPYRIGHT: (C)2013,JPO&INPIT |
