Example matched 50 ohm load
Return loss is not finite when gamma is zero.
Worked example
Total length 20.3786 m
Each leg 10.1893 m
L_feet = 468 / f. L_meters = 142.65 / f. Leg feet = 234 / f. Leg meters = 71.325 / f.
These lengths are a formula starting point. They are not a guaranteed cut length. End effect, insulation, and height are not in the equation.
VSWR
Conditions: load 50 ohm, reference 50 ohm. Real values only. Length is not used.
Gamma is 0, so the formula calls this a complete match. Return loss is not finite. This is not a measured match and not a guaranteed build.
Gamma 0
Gamma = (Z_L - Z_0) / (Z_L + Z_0)
VSWR 1
VSWR = (1 + |Gamma|) / (1 - |Gamma|)
Return loss is not finite because |Gamma| is 0.
Reflected power 0 %
P_refl = |Gamma|^2 * 100
Notes only: about 73 ohms at 180 degrees, about 58 at 120, about 50 at 90. Not interpolated.