in the HFSS book there is an exapmle about exciting patch antenna by probe,if u search in the internet,
easily can download this book, otherwise u can upload your file for detecting error
i am a under graduate....i am from andhra pradesh, india.....i need a circular patch antenna with co axial feed...if possible can say how to do the two rectangular patches on single substrate and give the co axial feed
hello
are u intend to measure S21 or coupling between recanglar antennas?
if it is possible ,upload some refrence papers that you read about this matter