Hi
I want to send the signal from pre amplifier to main amplifier using RG-58 cable. At the same time I want to receive power supply from main amplifier on the same cable. So for this I need to match impedance from pre amplifier output to input main amplifier.Also, Power and signal sending together. Please help me.

 

Radio frequency systems use an inductor (choke) to keep the high frequencies from being shorted by the power supply because an inductor passes DC easily but is a high impedance at radio frequencies.
Capacitor coupling in the high frequency circuit keeps the circuit from shorting the DC power because the capacitor passes the signal easily but blocks DC.

Impedance matching has nothing to do with it.
Impedance matching stops high frequency reflections in the cable.

 

If I am using inductor for this case then my signal is able to transmit for frequency for 1khz to 100khz. My frequency range is 1Khz to 1Mhz. So How to tranmit this signal. I using bias tee concept but this is not working for such wide range of frequency.