| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a high frequency package wherein a resonant frequency occurring in the package is out of a used frequency band because the high frequency package has a plurality of notches (openings) having specific resonant frequencies as an antenna and the resonant frequency is within the used frequency band in a high frequency band. <P>SOLUTION: The package is provided with a metallic frame 2 wherein an opening 8 is provided on a metallic bottom plate 1 to be connected with an external terminal, a dielectric 3 that is formed on the metallic bottom plate 1 and where a high frequency transmission line and a plurality of input/output terminals are formed on its surface, a microwave circuit 6 housed within the metallic frame 2, and a metallic cover 9. The resonant frequency of the opening 8 generating in an electric field between the metallic frame 2 and the metallic bottom plate 1 is made outside the used frequency band by reducing the width of the opening 8 and optimizing it. <P>COPYRIGHT: (C)2005,JPO&NCIPI |
