| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a helical whip antenna operable in three or more frequency bands. <P>SOLUTION: This helical whip antenna 1 includes: a linear whip element 10; an element part connected to the upper end of the whip element 10 and comprising a first helical element 11; and a second helical element 12 having a helical part wound around the whip element 10. The whip element 10 is supplied with power from the lower end. The second helical element 12 is connected to a base part 13 functioning as a ground. The whip element 10 and the first helical element 11 are operable in a first frequency band and a second frequency band, and the second helical element 12 is operable in a third frequency band. <P>COPYRIGHT: (C)2009,JPO&INPIT |
