Usingwaveguide as inputport, inside the waveguide we adopt adoubleantipodal fin-line transition, by adding trayandE-Tjunction, we canadjust the amount of the branches to get more poweroutput.
The rear of the device has a powerinput, for those times when you don't want to burn through AAs and the bottom has a battery door (thankfully not protected by a screw).