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AC coupling capacitor placement

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Rahul Soni

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AC coupling caps are placed closer to transmitter. Why ?
 

erikl

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To limit the AC voltage (which might be high / dangerous) to the shortest possible wire connection.
 

Borber

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AC coupling capacitors block DC voltage to disable DC current into load of transmitter which can destroy it.
 

AMS012

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Any routing between the capacitor and the power amplifier in the transmitter changes the impedance matching.
 

Rahul Soni

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AC coupling capacitors block DC voltage to disable DC current into load of transmitter which can destroy it.

Thank you for your answer but this thing I know.
I wan to ask why the placement of Coupling Caps is done "closer" to transmitter. What if we put them closer to receiver.

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To limit the AC voltage (which might be high / dangerous) to the shortest possible wire connection.

What if we put AC coupling caps closer to receiver?
 

Borber

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What kind of transmitter-receiver you are talking about? Frequency, power, tehnology...
 

erikl

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To limit the AC voltage (which might be high / dangerous) to the shortest possible wire connection.

What if we put AC coupling caps closer to receiver?

Then the connection leading AC voltage is longer, so there's more length for radiant emittance and possible missing isolation, leakage, flashover, danger by touching.
 

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