| 摘要 |
PROBLEM TO BE SOLVED: To provide a portable radio unit ensuring high-rate and large-capacitance communication by reducing an inter-antenna correlation coefficient in various use styles of a user. SOLUTION: An antenna element 1 is disposed externally from an upper end of a casing 4 opposed to a side of a display unit 23, an antenna element 2 is disposed in parallel with the antenna element separately in the direction of width of the antenna element 1, and an antenna element 3 is disposed in parallel with the antenna element 1 from the side of the display unit 23 separated from the antenna element 1 in the direction of width. The antenna element 1 is connected with a transmission/reception duplexer 14, and either the antenna element 2 or the antenna element 3 is selected and connected with a transmission/reception duplexer 15 by controlling a high frequency switch 11 in accordance with angle information from a gravity sensor 22. A reception signal is passed through the transmission/reception duplexers 14 and 15, amplified by reception circuits 18 and 19 and separated by a demodulation unit 20, thereby extracting reception information. COPYRIGHT: (C)2006,JPO&NCIPI
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