HFSS Impedance not Matching Measured

Status
Not open for further replies.
D

drewandrew2003

Newbie level 5
Joined
Aug 14, 2013
Messages
10
Helped
0
Reputation
0
Reaction score
0
Trophy points
1
Visit site
Activity points
65
Hello all, I'm hoping someone can clue me in as to why my HFSS simulation results aren't matching my measurements (see attached). I'm simulating a bowtie and SMA connector.



Funny thing is that when I add a parallel 2k ohm resistor and a series 7 ohm resistor, the traces match up a lot more closely. I'm exporting S parameters generated by HFSS and using Spectre to simulate the antenna S parameters plus resistors.

Hope someone can help.

Thanks
Andy
 

I realize it's hard to answer my prior question without more intimate knowledge about my experiment, so I'll ask another questions....can someone please comment on the accuracy of HFSS's input impedance results? I ask because I was trying to design a dual band high impedance antenna, and HFSS showed great results however the measurements were pretty dismal at the higher frequency. Also, can anyone point out common mistakes that might affect the impedance levels?

Thanks
Andy
 


Sure. I've found HFSS only gives very accurate port impedances (for waveports - is this what you're using?) when you a) select the correct impedance definition type (i.e. pv, pi, etc. - recommendations can be found in help documentation) and more importantly mesh the port finely.
 

Status
Not open for further replies.

Similar threads

Menu
Log in
Register
Cookies are required to use this site. You must accept them to continue using the site. Learn more…