Adapting car GPS antenna to Android device

One thing I can't comprehend regarding the folowing diagram of the bias tee. I don't see any diode, so how the 5v does not go to the receiver as well? Does the capacitors work as a diode? I'm confused.


Diode, no. A capacitor blocks DC voltage and passes AC voltage. So the DC goes where it should and the AC goes where it should, too.

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