[EMC仿真]180 hybrid

The 180o hybrid functions as a splitter/combiner for both 0o and 180o signals. You may download an RgA4@J#  
analysis program that performs all the calculations described in this article. The 180o hybrid is F|`B2Gr  
usually represented as in figure 1 with the angles labeled along the sides. A signal into port 1 appears \Pmk`^T  
in-phase, 3 dB attenuated, at port 2 and port 4. No signal appears at port 3 therefore port 3 .. Sr 4 7u{n  
d}cJ5!d  

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Attenuators are devices used to adjust signal levels, to control impedance mismatch and to isolate circuit stages.

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不会是pi衰吧

看看什么东东……