Help a new CST user with microstrip antennas simulation

Hello, guys,

I am a new CST user, and I am learning it replicating experimental results from articles and I've had problems with a rectangular microstrip antenna from the attached article. I chose the configuration a = 1.7 cm and b = 1.1 cm. The first result I am comparing to the simulation is impedance vs. frequency (figure 2 in the article), but I can't reach it. I would like to share with you the project I designed and the simulation results so you can give me tips.

Thank you!

申明：网友回复良莠不齐，仅供参考。如需专业解答，请学习易迪拓培训专家讲授的CST视频培训教程。