| 摘要 |
<p>PURPOSE:To simplify constitution and to improve a gain by constituting an antenna system for radar with three channels of a waveguide, same rotary transmission structure in a rotary shaft and same rotary transmission structure composed by means of a conductive pin. CONSTITUTION:A micro strip array antenna board 100 is fitted to the upper end part-side of the rotary shaft 200 and the conductive pin 220 which passes through the feeding point of the micro strip array antenna board 100 and the side wall of the rotary shaft 200 and reaches a shaft for center conductor 215 is provided. An insulating body is covered on the outer periphery of the conductive pin 220 and same rotary transmission structure is constituted. The shaft for center conductor 215 is directly connected with the feeding point of the micro strip array antenna board 100 in terms of high frequency by the same rotary transmission structure. Thus, one channel can be reduced compared to conventional four channels and therefore a conversion loss can be reduced and structure can be made simple, whereby the gain can be improved.</p> |
