The simplest power splitter is a “T” junction. But it comes with issues:

1) Poor isolation
2) Impedance mismatch

 T-shaped splitters consist of one input and two outputs. If it’s symmetric, you get equal signals out (same amplitude and phase).

For example, you can use this splitter to combine two antennas into a receiver. If one antenna shorts at resonance, it drags down the other—killing your signal. A proper power splitter avoids this by isolating inputs, so a fault at one barely affects the other.

 Impedance mismatch is another problem. In a 50-ohm system, the "T" creates a 25-ohm load at the input. You’ll need a 25:50 matching transformer to fix that.

A better design? Use a transformer and resistor to create a real 2-way 0° power splitter/combiner:

- The transformer provides phase inversion.
- The resistor (matched to transformer impedance) cancels signals between ports (giving high isolation).

 With correct impedance matching, you should get 3.1-3.2 dB loss per port (3 dB on split and 0.2dB on real life losses).