lam8229
Newbie level 4
My final year project is to design a microwave amplifier using BJT 2sc3356(NE85633), operation at 433MHz, with about 10dB gain and noise figure 1.5dB~2.5dB.
I use the simulation software ADS to perform simulation. The transistor model is the design kit dowloaded from NEC website.
Althought the simulation results is very good , the performance of the real product is very bad, the S21 is only about 2dB...
For this poor results, I have many question. Am I used the wrong biasing network? Am I has design the input and output matching network wrongly? Or I still have something mistake about using ADS?
Attached with the schematics for the amplifier and the ADS simulation result. Please have a look and feel free to critize it.
I use the simulation software ADS to perform simulation. The transistor model is the design kit dowloaded from NEC website.
Althought the simulation results is very good , the performance of the real product is very bad, the S21 is only about 2dB...
For this poor results, I have many question. Am I used the wrong biasing network? Am I has design the input and output matching network wrongly? Or I still have something mistake about using ADS?
Attached with the schematics for the amplifier and the ADS simulation result. Please have a look and feel free to critize it.