Electrically Variable Inductors and Varactors

[dnyberg2]

I was thinking (and hoping) that a saturable reactor type application of an RF balun transformer could be used to tune the inductance of an RF circuit using a DC voltage much like using a varactor to vary capacitance. Any comments are most welcome. Also, as far as varactors go, I know they lend themselves very useful in oscillator circuits and modulators, but what about power applications such as power oscillators? What is the largest power level one can find a varactor will work up to? Can you find a varactor that will work in a tuned circuit of a power RF oscillator of say hundreds of milliwatts at hundreds of kilohertz and still be able to vary the capacitance even if you loose some of that tuning range?

 

[davenn]

The BAY96 Varactor diode will happily work up to 1296MHz. Its a stud mounted power varactor. 12Watts of 432MHz will give an easy 6 to 8 Watts of 1296MHz

Dave