[SOLVED] LNA design help,(my stimulation vs real results )

[hellotoke]

So i built and tested my LNA,these are the results below the gain value at 566MHZ is where i want it to be but the gain at 800MHZ isnt right its way to low compared to the stimulation on the left in awr.Heres my pcb layout on fr4 1.6mm thickness.any help or advice

 

[psach27]

Hello,

At 800MHz you have a really poor matching (-0.35dB), practically a full reflection. Maybe your problem is in the input matching network. When the signal not enters the amplifier you couldn't have gain. Could you send a schematic of the circuit?

By the waye, where is the LNA located excatly?

Regards

 

[volker@muehlhaus]

Have you included the vias at the transistor in AWR simulation?

 

[BigBoss]

This layout is NOT a RF layout. Even-tough the operating frequency is low, the layout is bad.

 

[FvM]

We don't know what has been simulated at all.

 

[hellotoke]

Hello,

At 800MHz you have a really poor matching (-0.35dB), practically a full reflection. Maybe your problem is in the input matching network. When the signal not enters the amplifier you couldn't have gain. Could you send a schematic of the circuit?

By the waye, where is the LNA located excatly?

Regards

i matched it at 566 MHZ

 

[hellotoke]

Have you included the vias at the transistor in AWR simulation?

no i haven't ,can you explain how ,and why you asked

 

[hellotoke]

i matched it at 566 MHZ