CST offers a wide range of EM simulation software to address design challenges across the electromagnetic spectrum, from static and low frequency to microwave and RF, for a range of applications, including EDA & electronics, EMC & EMI and charged particle dynamics.
You can also see for more tutorials
https://www.youtube.com/playlist?list=PLnWvsQrB1aci53O5_SfZ1FdUg_3iyJWtM
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Please watch: "Microstrip Patch Antenna using HFSS (Part-1)"
https://www.youtube.com/watch?v=vLUh9k4XxKI
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