发明名称 |
POLARIZATION PLANE CONTROL ANTENNA, AND METHOD OF CALIBRATING POLARIZATION PLANE CONTROL ANTENNA |
摘要 |
<P>PROBLEM TO BE SOLVED: To provide a polarization plane control antenna which is capable of performing calibration inexpensively and is suitable for use under a mobile environment. <P>SOLUTION: A polarization plane control antenna includes: a distribution unit for distributing an input signal to two paths on the basis of a set polarization angle; a balance circuit including a first 90° hybrid and a second 90° hybrid connected with an output of the distribution unit; a polarization shared antenna which transmits an output of the second 90° hybrid with orthogonal polarized waves; first and second amplitude/phase control unit for changing amplitudes and phases of respective signals converted by the first 90° hybrid; a control unit which sets the polarization angle of the distribution unit and sets gain coefficients and phase coefficients of the first and second amplitude/phase control units; a means which is connected with the output of the second 90° hybrid and extracts a calibration signal flowing in the output; and a means for measuring a level of the extracted calibration signal. <P>COPYRIGHT: (C)2009,JPO&INPIT |
申请公布号 |
JP2009194808(A) |
申请公布日期 |
2009.08.27 |
申请号 |
JP20080035715 |
申请日期 |
2008.02.18 |
申请人 |
NIPPON TELEGR & TELEPH CORP <NTT> |
发明人 |
SUZUKI YOSHINORI;KOBAYASHI SEI;OHATA KOHEI |
分类号 |
H01Q3/26;G01R29/10;H04B7/10 |
主分类号 |
H01Q3/26 |
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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