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FEM or Momentum for antenna simulation

Question asked by Christoph2 on May 15, 2017
Latest reply on May 18, 2017 by Christoph2

Hello,

 

I'm trying to simulate microstrip-antennas with ADS in the range up to 1 GHz. I defined a 1.6 mm FR4-Substrate with two conductor layers. On the upper layer i built my antenna and on the lower layer i built the ground. There is one differential port with  at the antenna and  at the ground. After simulating with FEM and Momentum, i could find huge differences between the results. While the Momentum results showing an antenna efficiency of about 1 %, the FEM results showing an efficiency of about 60 %. Even the farfields look quite different. Both simulations were done with default settings. Which result is the correct one or what should i change to get more similar results?

 

Thanks.

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