Your idea is totally impractical!
If this could be used as a weapon,the military would be already using it.
That said,it is dangerous,as you could injure yourself or others by playing about without,obviously from your posting,having any idea what you are doing.
Even if it could work,what would you need such a weapon for?
Hunting?--you'd have to have a very long power cord!
Or,if you start pointing this thing at people in the street,claiming it to be a weapon, the police will come along with real weapons,& arrest you or shoot you!
Sorry,very bad idea!!
Go away,& learn some theory,& you will realise the limitations of what you can or can't (or shouldn't ) do with high power Radio Frequency equipment.
VK6ZGO