Phase is associated with field component or S paramters. So you will need to access field-quantity. In addition, usually phase is a single value. However is can be distribute in space. ONce you define a reference point or a plane, you can use field component to get the phase. Pleae refer to the Metamaterial exmaple https://optics.ansys.com/hc/en-us/articles/360042097393-Metamaterial-parameter-extraction-Smith
You will decompose the fields into LCP and RCP.
Those are not the scope of this post. Please try and in case you cannoy find solutions, please write new posts for each.
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