AnsweredAssumed Answered

confusing result

Question asked by mhtplsh on Mar 29, 2007
Latest reply on Mar 31, 2007 by mhtplsh
I designed 2 stage preamplifer for 88~108 mhz. I designed the input  filter required with RFSIM99 & got it confimed by my friend using serenade 8.7. In the simualtion i found coupling capacitor between the two stages increases return loss by reducing the pf value of the capacitor.
But when i assembled the circuit & tested it on 8712C, the return loss increaes with increasing the capacitor value. but it decreaswes when ireduce the capacitor value. This is exectly opposite than simulation.
Guidance in the matter will be highly appreciated as i am totally new & this is my first project with 8712C.