Re: RF amplifier design
Hello buddy,
Firstly, there is no need to bias the transistor with R1 and R2. Ii would result into large DC power loss. Since you are using a tank circuit, a class C model is ideal if the load impedance is not too low and the BW requirement is less.
Output impedance of the transistor would be determined by the CE Early Effect impedance Ro, for frequencies near to or at resonance. This also is undesirable as it reduces the amplifier power efficiency ratio i.e Poac/Pidc. To counter it, you need to select a transistor with high Early Voltage Va.
Anyways, you need to have a basic theorotical knowledge of this subject before you implement it in pratice. There are many sites on net that have enough informative content to solve your purpose. If possible, i'll come back with links of some of these pages.
Regards Prasanna.
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