| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a helical antenna for vehicles which can be miniaturized in size, and be made broad band. <P>SOLUTION: The helical antenna for vehicles mainly includes a first element 11 and a second element 12. The first element 11 is wound spirally, one end thereof being connected to a feeding portion 20. The second element 12 is wound spirally, being coaxial with the spiral axis of the first element 11. Moreover, the one end of the second element 12 is physically connected to the first element 11 and another end is physically opened, being constituted so as to be sub resonated with the first element 11. <P>COPYRIGHT: (C)2011,JPO&INPIT |
