| 摘要 |
A consecutive conversion switch is provided to convert a desired band of a signal to two or more than two of antennas or transceiving elements for output of a transmitter seamlessly, therefore consecutive conversion of RF(Radio Frequency) signals is available. A consecutive conversion switch(20) comprises as follows. A circulator(21) flows an inputted transmission signal in clockwise direction. A variable band pass filter(22) passes or reflects a desired signal. A signal inputted to a terminal 1 of the circulator flows in clockwise direction, and is outputted to a terminal 2 to pass through the variable band pass filter controlled according to a desired band. The signal passing through the filter is delivered through an antenna(10-1) via a terminal 4.
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