发明名称 |
RADIO WAVE ARRIVAL ANGLE DETECTING DEVICE AND RADIO WAVE ARRIVAL ANGLE DETECTING METHOD |
摘要 |
A radio wave arrival angle detecting device includes: a first receiver antenna; a second receiver antenna that is located apart from the first receiver antenna by a distance less than the wavelength of the signal wave; an oscillator that outputs an oscillation wave at the same frequency as the signal wave; a first multiplier that outputs a first mixture wave by multiplying the first signal wave by the oscillation wave; a first filter that extracts a first DC component of the first mixture wave; a second multiplier that outputs a second mixture wave by multiplying the second signal wave by the oscillation wave; a second filter that extracts a second DC component of the second mixture wave; and an arrival angle calculator that calculates a phase difference between the first signal wave and the second signal wave and that calculates an arrival angle of the signal wave. |
申请公布号 |
US2011281539(A1) |
申请公布日期 |
2011.11.17 |
申请号 |
US201113105767 |
申请日期 |
2011.05.11 |
申请人 |
YAMADA HIDEAKI;SEIKO EPSON CORPORATION |
发明人 |
YAMADA HIDEAKI |
分类号 |
H04B7/00 |
主分类号 |
H04B7/00 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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