These 3 dB 180o mini-hybrids are highly reliable
rugged stripline-constructed units that can be used
either to divide or combine R.F. power. A signal
incident at the sum (S) port will yield in-phase
amplitude balanced signals at the output ports.
Conversely, a signal applied to the difference (?)
port will yield amplitude balanced and 180o out of
phase signals at the output ports.