GENERAL DESIGN CRITERIA: VSWR/RETURN LOSS
An equivalent parameter is either the reflection coefficient or the return loss, which compares the power in the reflected wave with that in the incident wave, expressed in decibels. Return loss can be calculated from VSWR, and vice-versa. (Table 1)
Note that as VSWR increases with greater reflection, the equivalent return loss value decreases. Typical microwave cable assembly VSWRs range from 1.1 to 1.5, or return losses of 26.4 to 14.0 dB, respectively, indicating power transmission efficiencies of 99.8% to 96.0%.