| 摘要 |
<P>PROBLEM TO BE SOLVED: To improve a dual band antenna adopting a separate output configuration so as to provide a high gain and compactness, and excellent isolation to the antenna. <P>SOLUTION: Insulation supports 3 support an over-head board 2 in parallel with a base board 1 acting like a base. A loop antenna element 5 is formed on a face of the over-head board 2 in opposition to a ground board 7 provided to the base board 1, and a high frequency signal of a wavelength of λa (5 GHz) is applied to the loop antenna element 5 via an exciter conductive pattern 4 and a coupling capacitor c. Further, a dipole antenna element 8 and a dipole antenna exclusive use ground board 9 are formed on the base board 1 and a high frequency signal of a wavelength of λb (2.4 GHz) is applied to the element 8 via a microstrip line 10. <P>COPYRIGHT: (C)2004,JPO&NCIPI |
