| 摘要 |
The disclosed demultiplexer is provided with a first and a second demultiplexing circuit. The first demultiplexing circuit includes a first filter having a first pass band and a second filter having a second pass band; the second demultiplexing circuit includes a third filter having a third pass band, to the outside of the of the frequency band which includes the first and second pass bands. The input impedance of the first demultiplexing circuit has first reactance components which are inductive or capacitive in the first pass band, and has second reactance components, which are of the opposite polarity to the first reactance components, in the second pass band; if the first reactance components are inductive, the input impedance of the second demultiplexing circuit is capacitive in the first pass band and inductive in the second pass band, and if the first reactance components are capacitive, the input impedance is inductive in the first pass band and capacitive in the second pass band. |
