How can we calculate the mutual coupling effects of antenna arrays with single port in CST? The array consists of 4 element slots which is fed simultaneously using a corporate feed. What all parameters are to be find out for determining the mutual coupling effects of the antenna elements?
You need to give each antenna a separate feed to find out the mutual coupling effects. You can feed each one and see what signal appears at the feed to each of the others, and what the radiation pattern is, and also feed all at once to see how it adds together - you can also do this mathematically once you have the 4 separate results. If it is symmetrical you may only need one or two results, depending on the symmetry. Then, if needed, you can adjust the design so that the mutual coupling does not harm the match or radiation pattern. Then put the common feed back.
Mutual coupling is between two or multiple elements which are fed separately. You need to feed each element of the array separately.
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