Cobham Antenna Systems, Microwave Antennas
TECHNICAL INFORMATION
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PRIMARY SPECIFICATION - Return Loss and VSWR
This is the amount of signal that is reflected by the antenna at the connector. This is expressed either as the relative level of the return signal in dB, or in terms of The Voltage Standing Wave Ratio (VSWR) present on the input to the antenna as a result of the reflection. Return Loss and VSWR are related.
| VSWR | Return Loss | Transmitted Power |
| 1.3:1 | 17.7dB | 98.3% |
| 1.5:1 | 14.0dB | 96% |
| 2.0:1 | 9.5dB | 89% |
| 2.5:1 | 7.4dB | 82% |
| 3.0:1 | 6.0dB | 75% |
Illustrated: A VSWR of 1.5 is equivalent to a return loss of -14dB.
The graph shows the relationship between VSWR and Return Loss.
