I have been asked to show the Hand Effects of MIMO antenna for 5G smartphones, Kindly help how to calculate in CST, a step by step guide will be highly appreciated.
Hello Ali Sufyan, When designing a MIMO antenna for 5G smartphones, it's important to account for the effect of the human hand on antenna performance. To simulate this interaction using CST (Computer Simulation Technology), there are several steps you can follow.
Firstly, you need to create a MIMO antenna model that meets the requirements for 5G smartphones. You can either start from scratch or use a pre-existing model. Once you have your model, you need to set up a human hand model that represents the lossy dielectric material of a real hand. This will allow you to simulate the hand-antenna interaction accurately.
Next, you need to position the hand model realistically relative to the antenna to represent how it would be held by a user during normal operation. This step is crucial to accurately capture the impact of the hand on the antenna's performance.
After positioning the hand model, you need to properly mesh both the antenna and the hand model to accurately capture the interaction effects between them. You should set the frequency range and frequency step to suit 5G applications, which typically range between 3.5 GHz and 28 GHz.
Once you've completed these steps, you can run the electromagnetic simulation to obtain the S-parameters, radiation patterns, and efficiency of the MIMO antenna with the hand effect included. To evaluate the impact of the hand on the MIMO antenna's performance, you should also simulate the antenna without the hand model and compare the results. This will help you to identify any differences in S-parameters, total efficiency, and radiation patterns.
Finally, to evaluate the MIMO performance metrics, you need to calculate the envelope correlation coefficient (ECC) and the diversity gain. These metrics will help you to assess how effectively the antenna system can cope with multipath fading and spatial diversity in the presence of hand effects.
It's important to remember that these steps are just a general guide, and you may need to adapt them to your specific case or model. If you face any difficulties, you can consult the CST Studio Suite documentation or online forums for more information and assistance.
Regards,
What you ask isn't easy - see this paper to get a rough idea of the complexities involved.
Millimeter-Wave Beam Selection in Time-Varying Channels with User Orientation Changes - https://ece.iisc.ac.in/~nextgenwrl/papers/ashoke_2021_twc.pdf
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