| 摘要 |
<P>PROBLEM TO BE SOLVED: To constitute a frequency stabilization circuit capable of stabilizing the frequency of a high frequency signal without being influenced by the form of a radiator and an enclosure, and an arrangement situation of an adjacent component, and to constitute an antenna apparatus and a communication terminal device. <P>SOLUTION: In a frequency stabilization circuit 25 having four coil-like conductors L1 to L4, a first coil-like conductor L1 and a second coil-like conductor L2 are connected in series to constitute a first series circuit, a third coil-like conductor L3 and a fourth coil-like conductor L4 are connected in series to constitute a second series circuit, the first series circuit is connected between an antenna port and a feed port, and the second series circuit is connected between the antenna port and a ground. The first coil-like conductor L1 and the second coil-like conductor L2 are wound so that a first closed magnetic path (a loop shown by magnetic flux FP12) may be constituted, and the third coil-like conductor L3 and the fourth coil-like conductor L4 are wound so that a second magnetic path (a loop shown by magnetic flux FP34) may be constituted. <P>COPYRIGHT: (C)2012,JPO&INPIT |
