发明名称 |
Method and apparatus for transmitting radio wave by rotating plane of polarization |
摘要 |
At a transmitting end, first and second dipole antennas are crossed each other by right angles and are arranged in a plane perpendicular to a propagating direction of radio wave. In first and second balanced modulators, a carrier signal is modulated with respective modulation signals having a phase difference of 90 DEG to produce balanced-modulated signals, which are then supplied to the first and second dipole antennas, respectively. Then a plane of polarization of a composite vector of radio waves transmitted by the dipole antennas is rotated at a frequency of the modulation signals, said frequency being higher than a fading frequency. The modulation signals are controlled by a state of a digital signal to be transmitted. At a receiving end, the digital signal is reproduced by receiving the transmitted radio wave by a conventional single side band receiver.
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申请公布号 |
US6061020(A) |
申请公布日期 |
2000.05.09 |
申请号 |
US19970995044 |
申请日期 |
1997.10.31 |
申请人 |
THE UNIVERSITY OF ELECTRO-COMMUNICATIONS |
发明人 |
ISHIJIMA, IWAO;KANAI, YASUBUMI;ISHIKAWA, MICHIO;TSUTSUMI, AKIRA;SUGIYAMA, SHIGEKI;MIYOSHI, TOSHIO |
分类号 |
H04B15/00;H04B7/00;H04B7/10;(IPC1-7):H01Q21/06;H04B1/10;H04B7/01 |
主分类号 |
H04B15/00 |
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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