| 摘要 |
PROBLEM TO BE SOLVED: To provide an uninterruptible small-sized radiowave switching device easy to be used with simple configuration, at a low cost, used for digital terrestrial broadcasting and repeating with no instantaneous break. SOLUTION: The uninterruptible radiowave switching device comprises two 3-terminal circulators, a sub-line for connecting the 3-terminal circulators, at least one variable reactance element, and a drive means for continuously changing a reactance value of the variable reactance element. One of the 3-terminal circulators comprises a terminal for connecting a first transmitter, a terminal for connecting the sub-line, and a terminal for connecting a pseudo load. The other 3-terminal circulator comprises a terminal for connecting a second transmitter, a terminal for connecting the sub-line, and a terminal for connecting an antenna with the variable reactance element provided at the middle point of the sub-line. COPYRIGHT: (C)2006,JPO&NCIPI
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