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Loop Antenna for Class-E amplifier
Hello,
I've made a Class-E amplifier which works rather well as I get 25VRMS into a 50 Ohm resistor. But heating a resistor is not really want I do ;-) I want to send this power into a loop antenna to transmit power by induction to another aantenna 10 to 20 mm away. The transmit loop antenna is in series with a capacitor and the receive antenna is in parallel with a capacitor. Both antennas are tuned to the correct frequency. The problem is that though I have 125Vpkpk at the transistor drain, I only have 15Vpkpk at my loop antenna and also 15Vpkpk in the receive antenna (not loaded) I guess I need to to some impedance matching but how do I compute the impedance of those loops antennas (is it just the L//C ?) and how do I compute the output impedance of the class-E amplifier ? Any suggestion, URL etc ? Thanks, Marc Battyani |
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