walid Posted August 2, 2009 Report Share Posted August 2, 2009 Hellow,I build the following pi filter to match 100 ohm source to 1000 ohm load, I did the calculations based on RF Circuit Design BookAs u can see at the center freq fc = 30MHz & Q=15 I had 3.771dB, I was surprised by where this value? this is amplification!!!!The second question is: If i want to match 1000 ohm source to 100 ohm load, Simply replace the capacitors, one must place the other, when i did so and simulate i had the following:[img width=680 height=478]Look!! -9.8dB at the center freq.can you please comment, how to match big source to small load without that bad attenuationthanks alot Quote Link to comment Share on other sites More sharing options...
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