| 摘要 |
A portable wireless device realizing high-speed transmission in downlink communication in a used state that a foldable portable wireless device is held in a hand of the user and ensuring a high antenna radiation efficiency. In the portable wireless device, platy conductors ( 1, 3, 4 ) are arranged in the longitudinal direction on the back of a display section ( 35 ) of an upper case ( 5 ). The signal of a transmission circuit ( 25 ) is distributed by a power distributor ( 18 ). One signal is fed to a platy conductor ( 1 ) through a phase shifter ( 17 ) and the other is fed to the platy conductor ( 3 ) or the platy conductor ( 4 ) from a high-frequency switch ( 19 ) through a transmission/reception duplexer ( 20 ) or a transmission/reception duplexer ( 21 ). The high-frequency switch ( 19 ) selectively feeds power to either the platy conductor ( 3 ) or the platy conductor ( 4 ) according to the signal from a gravity sensor ( 26 ). The received signal is extracted by the transmission/reception duplexers ( 20, 21 ), amplified by a receiving circuit ( 22 ) and a receiving circuit ( 23 ), and multiplied by a predetermined weight coefficient by a demodulating section ( 24 ) and combined.
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