antenna missmatch
vfone, thanks for your reply.
I know what the circuit does, but I don't understand the principle of its operation.
I know lumped versions of directional coupler, but they look like transformers, they have several windings, at least primary and secondary , here we a have a simple inductor.....
I dont understand how the power on one side of the inductor can be the forward power and on the other side the reflected power?
the diodes form a simple peak voltage detector, how can the detector be sensitive to the reflected power and not the forward power?
My theory was that the inductor and capacitors form a lumped equivalent of lambda/4 line, but in this case wouldn't there be an impedance transformation? would the impedance before and after the inductor be different?