| 摘要 |
A plurality of different frequency signals f1, f2, f3, . . . fn are combined for transmission in a common transmission line by a series of hybrid circuits each including a through coupler for feeding through frequency signals through the hybrid circuit to the output thereof, an injection coupler for feeding an injected frequency signal to the hybrid output and one or more tuned circuits between the couplers that are tuned to the frequency of the injected frequency signal and connected to the couplers by a stub transmission line of electrical length in terms of wave lengths of the through frequency, so that substantially all power of the through frequency signal and all power of the injected frequency signal flow from the hybrid circuit output to the next hybrid circuit in the series.
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