RADIOFREQUENCY POWER COMBINER FOR CW AND PULSED APPLICATIONS

We describe the design and operation of a circuit to combine the outpu t signals of two high-power radio transmitters into a single load. A w orking unit is realized using a commonly available ferrite and cheap c oaxial cables. Performance tests indicate satisfactory operation from 3 to 50 MHz with less than 1 dB total power loss while guaranteeing ad equate isolation between the transmitters. The power combiner can also be constructed specifically to withstand high line voltages for short time, periods thus making it suitable for high-power pulsed applicati ons such as plasma formation and heating.