| 摘要 |
PROBLEM TO BE SOLVED: To provide an antenna which has satisfactory receiving sensitivity and excellent transmitting efficiency by forming an opening at a ground conductor, preparing some or all of feeding points within the opening, securing the capacitive coupling between the ground conductor and every feeding point at least within the opening and placing one of both ends of an antenna conductor spaced apart from the ground conductor by a specific distance. SOLUTION: A high frequency glass antenna used for a vehicle is placed at a lower right part of a rear glass plate 1. An opening 7c of an almost square shape is formed at a ground conductor 7, and all feeding points 6 are prepared within the opening 7c and the capacitive coupling is secured between the conductor 7 and every point 6 within the opening 7c. The distance where the capacitive coupling is secured between both conductors is usually set in a range of 0.1-50 mm. A feeding point 6 is connected to one of both ends of an antenna conductor 4 and it's desirable to secure no capacitive coupling as much as possible between the conductor 7 and a tip 4c, i.e., the other end of the conductor 4 and also secure a distance of >=50 mm between the conductor 7 and the tip 4c.
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