| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide an antenna for information terminal equipped with a structure for restraining the deterioration of a reception signal due to the deterioration of isolation accompanying the approach of a plurality of antennas. <P>SOLUTION: The antenna for information terminal comprises a plurality of antennas 1, 2 for receiving electric wave signals of different power levels in different frequency bands; at least one signal amplifier means 10 for amplifying an output signal from a first antenna 1 for receiving a first electric wave signal having lower reception power among the plurality of the antennas 1, 2; and at least one signal synthesizing means 11 for synthesizing an output signal from at least one other antenna 2 for receiving other electric wave signal having higher reception power than the first electric wave signal, and having different frequency from the first electric wave signal among the plurality of the antennas 1, 2 and an output signal of the signal amplifying means 10. The antenna ensures enough isolation to suppress the ripple of a gain-frequency characteristic of the first electric wave signal to 1dB or lower. <P>COPYRIGHT: (C)2007,JPO&INPIT |
