Welcome to EDA board. We hate begging for circuits, codes and complete projects here. Anything may be shared on the open forum for the benefit of all members. Read rules / announcements before posting. Have a nice time sharing knowledge.
You may use Google search with your keywords "SWR meter" and get a pileup of results. But working of any circuit at your end may not be guranteed by anyone. You know your knowledge better.
Cheers