scitronicscs | Antenna power injector and splitter Apr 08, 2007It looks like there is an invisible break in the circuit somewhere. I could try to fix it, or I could build a new one and address some other issues. So.. The injector consists of two RF jacks, one for the TV and one for the antenna. The power portion of the injector looks really simple. Antenna power injector and splitter | Electronics Forums Apr 08, 2007antenna. The power portion of the injector looks really simple. It's a transformer with a diode, a cap, and a resistor in series going to the antenna jack. There is a 'mystery component' that connects the TV jack to the antenna jack. It must be some sort of isolator so that the power doesn't get to the antenna.