impedance matching

Thread Starter


Joined Dec 21, 2008
I have a 300 watt RF amplifier .accourding my the RF amplifier's rating , it's input impedance matching is 50 ohms. And the power rating of RF transmitter circuit connected to the input of my amplifier should be 4 watts to get a 300 watt output.
Now, my aim is to design a 300 watt polarised RF transmitter.
I have planned to design a 4 watt colpitts circuit with definite freequency. but i have no idea of impedence matching with my RF amplifier.
I can't understand the term input impedence matching( 50 ohms for my transmitter).
give me idea to design the 4 watt ossilator circuit with impedence match with my RF amplifier.(please don't bother about the freequency, my design is not for communication purpose and hence no modulation is necesary).

thank you.


Joined Jan 16, 2008
Transmitting 300 watts of RF without a licence will probably land you in jail and get all your gear confiscated. At least it will give you plenty of time to study RF theory.