| 摘要 |
<P>PROBLEM TO BE SOLVED: To allow minimizing of the whole length of a multiple frequency antenna even in the operation in multiple frequency bands. <P>SOLUTION: A helical element capable of operation in the frequency bands of FM broadcast is wound around the outer circumferential surface of a stick-shaped support 10. A linear element 12 capable of operation in the frequency bands of terrestrial digital TV broadcast is disposed in first groove portion 10a provided on the outer circumferential surface of the support 10 with a given length from its inferior end. Accordingly, there can be realized a multiple frequency antenna 1 capable of operation in not only the frequency bands of FM broadcast but also the frequency bands of terrestrial digital TV broadcast, which multiple frequency antenna allows reduction of the while length L of the helical element because of the effect of the linear element 12. <P>COPYRIGHT: (C)2008,JPO&INPIT |
