I have designed the main parts of butler matrix with 5.2GHZ freq but there is some kind of freq shift to the 5.2 GHZ , if there are any one had some experience with that , please need help.
HFSS :stands for " High Frequency Structure Simulation " is a design and simulation program that you can use to make your design and simulate your patch micro-strip design and it is saved with .hfss file.
You can get free version for that (It is produced by the ansoft corporation) .
Please if you have any experience with that , check it fast and get back to me.