| 摘要 |
<P>PROBLEM TO BE SOLVED: To achieve a broad-band of an antenna characteristic and a matching of an antenna impedance with a coaxial cable at the same time without increasing an occupation area of the antenna. <P>SOLUTION: A two-frequency sharing antenna has a first dipole antenna element having a first resonance frequency and a second dipole antenna element having a second resonance frequency which is higher than the first resonance frequency. A parasitic element formed by a band-shaped metal film which is a little longer than an entire length of the antenna is arranged in parallel with an entire portion or a part of a transmission line and the antenna elements in a parallel face apart from the first and second antenna elements and the transmission line by a prescribed distance. <P>COPYRIGHT: (C)2007,JPO&INPIT |
