Inherent isolation degrades as a function of Output Termination VSWR. As the Output Termination VSWR approaches 2.5:1, a combiner with infinite Inherent Isolation provides only 2 dB more Isolation than one with 15 dB Inherent Isolation, and only 1 dB more than a unit with 20 dB Inherent Isolation. Therefore, any investment in a unit with greater than 20 dB Inherent Isolation, operating into an Output Termination VSWR greater than or equal to 2.5:1, should be reviewed
