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1. 发明公开

EP2601706A1 POWER DUAL-BAND ROTARY JOINT OPERATING ON TWO DIFFERENT BANDS 有权
标题翻译：与操作双频旋转连接在两个不同的频段
公开(公告)号：EP2601706A1
公开(公告)日：2013-06-12
申请号：EP11738972.6
申请日：2011-07-28
申请人： G.E.M. Elettronica S.r.L.
发明人： MORINI, Antonio , MALASPINA, Vincenzo , PANICHI, Paolo
IPC分类号： H01P1/06 , H01P1/16
CPC分类号： H01P1/062 , H01P1/066 , H01P1/069 , H01P1/16
摘要： Power dual-band rotary joint simultaneously operating on two frequency bands, A and B, made up of a couple of transducers, each between two rectangular waveguides, respectively operating on bands A and B, and a nested coaxial waveguide. The nested coaxial waveguide is made up of two concentric cylindric waveguides. The transducers are conceived in such a way that only modes with azimuthal symmetry are excited. The nested coaxial waveguide dimensions are chosen so that, on band B, the TM01 mode can propagate in the circular waveguide delimited by the internal surface of the smaller cylinder. The external surface of the smaller cylinder is the internal conductor of the coaxial working on band A, while the internal surface of the bigger cylinder is the external conductor of the same coaxial. The two transducers are connected through the nested waveguide. This connection system also contains a mechanism making possible that each transducer can rotate with respect to the other, as well as two chokes necessary to restore the electromagnetic continuity cut-off by the breaks. As the symmetry of the modal transducers makes possible the excitation of the only TM01 modes on band B and TEM modes on band A and that other modes, though above cutoff, are not excited at all, it allows that the electromagnetic behaviour is quite independent from the rotation angle of the rotary joint.

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