| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide an antenna system which has wide directivity while being small in size and simple in configuration and can transmit or receive radio waves of a plurality of wavelengths. <P>SOLUTION: An antenna 100 is equipped with dipole antennas A1 and A2 which are provided at an interval λ1/2 and can send and receive a radio wave of wavelength λ1 and dipole antennas A3 and A4 which are provided at an interval λ2/2 and can send and receive a radio wave of wavelength λ2. The dipole antennas A1 and A2 are fed in phase from feeders and the dipole antennas A3 and A4 are fed in phase from feeders, so that the antenna 100 can send and receive the radio waves of different wavelengths λ1 and λ2 and has bidirectionality along a Z axis. <P>COPYRIGHT: (C)2007,JPO&INPIT |
