Readily turned into a signal jammer? Do you know this or are you just guessing? Raspis are SBCs not tricorders from star trek.
In terms of actual knowledge, wifi chips, like the one on your laptop or a raspi do not have software settings for that. They are predominately defined by hardware and by opaque binary blobs the kernel developers have their hands full reverse engineering compatible interfaces for. In addition, electrical interference far beyond what a tiny communications radio is capable of can come from dangerous items such as microwaves, electric motors and nine volt batteries plus spools of wire.
Literally the first result on Google gives a simple to use jammer that works out of the box. Hook up an external antenna and you're good to go. Plenty of more sophisticated options if you dig a bit more.