VSWR
DON'T MAKE A BIG DEAL ABOUT VSWR
To have some reflected power when measuring VSWR is quite normal, climbing either side of resonance, it indicates that your yagi has a resonant frequency and that you and your radio can see it. Here is an example...
Regard VSWR readings as a guide only particularly when trying to establish just how good your system is. Completely flat in shack VSWR could for example indicate that your system may have hidden losses, be warned!
Graham Daubney F/G8MBI now F5VHX has written an excellent article concerning The design and feeding of Driven Elements for VHF/UHF Yagi Antennas
Consider that a VSWR of 1.5:1 equates to a Return Loss of 13.98dB OR a Mismatch loss of only 0.177dB!
Enter any one of the first three parameters below, then click SUBMIT to calculate % Reflected and Mismatch loss;
Please note that these calculators are intended for use in the context of VHF/UHF yagi antennas connected with 50-Ohms coaxial feeder cable. Return loss has historically been expressed as a negative number, and this convention is still widely found in professional radio communication and telecommunications literature. However, caution is required when discussing increasing or decreasing return loss as these terms strictly have the opposite meaning when return loss is defined as a negative quantity.