Difference between simulation and measured results in ADS

EDAboard.com Forum Index -> Electromagnetic Design and Simulation -> Difference between simulation and measured results in ADS

Author

Message

narayanb

Joined: 24 Jan 2009
Posts: 1

13 Sep 2009 16:45 Difference between simulation and measured results in ADS

What are the chances that ADS simmulations does not match with the actual measured results?
Got this problem when i designed a meander antenna in layout and simulated using momentum. A very prominent resonance appears at 200 MHz, which is completely missing in the measured results...
The antenna operating frequency is 200-800 MHz, designed to resonate around 300 MHz

Google
AdSense
Google Adsense

13 Sep 2009 16:45 Ads

Jamesanton

Joined: 10 Aug 2009
Posts: 22
Helped: 5

14 Sep 2009 9:04 Re: Difference between simulation and measured results in AD

Hai,

The substrate dielectric constant may vary depends on manufacturer for a example if u take FR-4 substrate its dielectric constant may vary from 4.2 to 4.6 so the resonant frequency shifted to some other band.

The connector should be properly soldered.....

skysearcher

Joined: 20 Jul 2009
Posts: 10

14 Sep 2009 16:09 Difference between simulation and measured results in ADS

Some - for a 2% microstrip filter I made, I had to fabricate several copies of the design at slightly different frequencies. Of course, I was also seeing an effect from lid height, too. It does seem odd for there to be a strong resonance, though - I agree with Jamesanton that improperly attached connectors can cause some weird problems.