| 摘要 |
<p>A demultiplexing circuit comprising one or more stages of a unit having a coupling element, and a resonance circuit coupled with the coupling element through a tap, and two or more band-pass filters passing signals in different frequency bands, wherein one end of each band-pass filter is connected directly with a common port. The coupling element and the resonance circuit in a first stage closest to the port of each band-pass filter is provided, respectively, with a function as the impedance matching means of each band-pass filter in addition to a function as a resonance means.</p> |
