| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a small antenna assembly, wherein resonance frequency is variable and gain is high e.g. in large frequency range like 470-770 MHz. <P>SOLUTION: In this antenna assembly, a substrate 2, a ground conductor 3 formed on a surface of the substrate 2, a loading portion 4 which is arranged on the substrate 2 and has an element assembly 14 and a linear conductor pattern 15 formed on the element assembly 14, a chip inductor 5 connected between end of the conductor pattern 15 and the ground conductor 3, and a supply point 7 which supplies electric power to the end of the chip inductor 5 are installed. A frequency regulation portion 6 is arranged between the end of the conductor pattern 15 and the chip inductor 5, and the portion 6 is equipped with a capacity variable diode which connects end of the conductor pattern 15 and the chip inductor 5, and a bias voltage input terminal which adjusts the capacitance of the capacity variable diode. <P>COPYRIGHT: (C)2007,JPO&INPIT |
