There's all kinds of toys for that:
However, they don't seem to sell HERF "guns". Wouldn't the asker's situation be best solved by HERFing a drone out of the sky as it passes his/her windows? "Oh, ooops! A small EMP knocked the drone's controls out? My bad!" Where can I buy a small HERF gun capable of roasting a drone looking in a 2nd floor window, but not so powerful as to destroy my neighbor's electronics across the alley?
So in the use case that I described, for a drone, the drone would get within jamming, lose signal and ... crash? Or do modern UAVs have protocols for losing connection?