Analyze reflection phase for a single reflectarray element - Infinite array approach

[winsonwhy]

Hi all,

I'm quite new to ansoft HFSS, can i know how to configure the setting in order to simulate the reflection phase for a reflectarray element using infinite array approach?

I have successful simulate the single element's reflection phase in HFSS 12 without the use of infinite array approach, just by the waveguide method with E-wall at the surrounding.

Thanks in advance!