Need plugins of Ansoft HFSS to compute Q of spiral inductor

Status
Not open for further replies.
M

mike_bihan

Full Member level 3
Joined
Mar 21, 2002
Messages
182
Helped
0
Reputation
0
Reaction score
0
Trophy points
1,296
Visit site
Activity points
1,531
: Need plugins of Ansoft HFSS to compute Q of spiral inductor, can any people offer hand?
 

really neccesary ?

Compute S-parameters and convert Touchstone format. Put them in a black box in a linear simulator and make a s-parameters simulation with second port short circuited. After this simulation , find Z-prameter and calculate real and imaginary part of the black box from S11 ( or they are automatically calculated ) and then ..

imag( Z11 )
Inducance = ----------------
2.pi.freq

imag ( Z11)
Q =---------------
real ( Z11)

I think it's clear ? Because I use this method within ADS and works well..

Good Luck
 

BigBoss said:
really neccesary ?

Compute S-parameters and convert Touchstone format. Put them in a black box in a linear simulator and make a s-parameters simulation with second port short circuited.


Why second port should be short circuited to get Z pars?
Click to expand...
 

Re: Need plugins of Ansoft HFSS to compute Q of spiral induc

Hi,

I think I can answer that question. The second port sould be short circuited to avoid loading of your inductor with 50Ohm impedance of the port. This 50Ohm will be included in your Q otherwise. Hope this helps

flyhigh
 

flyhigh,
This Q factor is named unloaded Q(Qu)?Thanks.

STD
 

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…