I am trying to design a spiral inductor in agilent ADS momentum. I took the MRIND element and attached differential ports to it , defined a mesh and simulated it from 1GHz to 10 GHz. but i am getting a very low value of L(in pH) and Q (<1)
i am also getting a very large resistance R ~ 50 ohm to 100 ohm from 1 to 10 GHz . the inductor dimensions are 50 um by 50 um No of turns = 1 w = 4 um .
can anyone please help me with this?? i am new to momentum and i am not able to get this right..
i saw the conductor defination(strip)... the conductor was defined as perfect conductor -
i changed it to conductor(impedence) and defined the value of impedence as 0.007 ohm per square - is that right?? or should i be using perfect conductor??
thanks
IF Q factor is too low, your losses are high.
What they are ??
Substrate losses, conductor losses and Eddy losses.
Double check your substrate definition and layer structure..
@jayce and bigboss: thanks guys for your help..i think i got it right now..
i changed layer and substrate definations to cond - copper and MSUB1...and i am getting a Q of about 5..
btw, i am trying to make a transformer now..if i make another inductor on a higher layer, i should be able to do my thing right??
thanks..
btw.. i read from momentum tutorial that MSUB1 should not be used for momentum..it gives inaccurate results..so now i am using a predefined silicon substrate..