Stripline to Microstrip transition

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Stripline to Microstrip transition

Postby avins_123 » Tue Mar 16, 2010 5:23 am

Hello everyone,

I am trying to simulate a stripline to microstrip transition, The impedance is matched to 50 ohms, but the return loss is very low in the order of -1 db.
I need to acheive a return loss of more than -20 db.
For this, I have constructed a simple stripline and a via which feeds to a microstrip line.

How do you acheive S11 to be > -20db
S21 and S31 to be >-3db.

The solution frequency is 18Ghz.

Secondly, If i want to acheive a broadband operation over the entire frequency range( i.e., having a uniform S11, S21, S31 over the frequency range from 15Ghz to 18Ghz.)

Please note that the project which I am doing is collected from the NASA technical reports server which is free for everyone.
The project document and HFSS file is also uploaded.

Regards,
Avin
Attachments
NPO41061.pdf
Project Document from where the model is sourced
(232.26 KiB) Downloaded 51 times
Stripline to Microstrip Transition.rar
Actual Model File
(16.3 KiB) Downloaded 56 times
avins_123
 
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