| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide an antenna and antenna apparatus each of which is suited for efficient mounting in a communication device and for a wide band for obtaining a high gain uniformly from a low frequency band to a high-frequency band to be used for the communication device, and to provide a communication device using the antenna apparatus. <P>SOLUTION: The antenna includes: a first antenna element having a base and a conductor penetrating through the base; and a second antenna element having a conductor portion having a shape of a plate or a line and a connecting conductor, wherein one end of the conductor is connected to the connecting conductor, and the connecting conductor is connected to a partway on the conductor portion. In such an antenna, because the conductor portion is formed extending along two directions with different lengths from a connection point with the connecting conductor, resonances can be achieved corresponding to approximatelyλ/4 of two frequencies corresponding to the lengths of extension in the directions. In this structure, the second antenna element can correspond to the GMS band or the like with the first antenna element, and a third antenna element can correspond to the DCS/PCS band or the like. Consequently, a frequency band in which a VSWR is low and a high gain can be obtained, can be expanded. <P>COPYRIGHT: (C)2009,JPO&INPIT</p> |
