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830MHz medium power amplifier principle circuit composed of

2015-01-05 03:29  
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830MHz medium power amplifier principle circuit composed of RF2104
Radio-frequency signal (RF) is input by pin 5, output by pin 12 after being amplified by the pre-amplifier, last stage power amplifier. pin 5 has the DC voltage, therefore it is added the separating direct coupling capacitor and simultaneously connected to divergence inductance (10nH) in parallel, pin 5's input impedance is 50Ω. The output end's pin 12, 13 are connected, usually, pin 13, 14 are connected outside to be used as the signal output, and the output connects the matching network to make the amplifier output impedance match with it, when the pin's loaded impedance is 5+10Ω, itmay obtain the peak power output. pin 13, 14 are connected outside to be used as the last stage power amplifier's power source end.