[hfss] I would like to design 1 sending and 1 receiving antenna

I'm trying to get the S21 variable of 1 sending and 1 receiving loop antennas using hfss. I used 'Driven Terminal' as solution type and 'lumped port' for port. I want to give a signal into sending antenna and find the signal of receving from receiving port.

As i mentioned i defined lumped port for sending and receiving port. bcs i don't know how and what to define the port for receiving port.

do you have any idea how to define the port for sending and receiving antennas?

Thankyou!

HFSS is probably (almost certainly) the wrong tool for your question. You will probably be bette served by Friis and the one way radar range equation.

Define the question in some detail and post it if you want meaningful help.

I found the journal and in the journal(pg 200), the author calculated efficiency of inductive link using HFSS.
I'll attach my design of hfss and the journal.