The log periodic is commonly used in high power driving point impedance ) are almost constant over its entire frequency range, with the match to a 300 ? feed line achieving a standing wave ratio of better than 2 : 1 over that range.
22.
Depending on the phase of the third term, the maximum and minimum values of V net ( the square root of the quantity in the equations ) are ( 1 + | ? | ) | A | and ( 1 " | ? | ) | A | respectively, for a standing wave ratio of:
23.
An impedance mismatch can be also quantified with the standing wave ratio ( SWR or VSWR for voltage ), which is connected to the impedance ratio and reflection coefficient by : VSWR = \ frac { | V | _ { max } } { | V | _ { min } } = \ frac { 1 + | \ Gamma | } { 1-| \ Gamma | }, where \ left | V \ right | _ { min, max } are the minimum and maximum values of the voltage absolute value, and the VSWR is the voltage standing wave ratio, which value of 1 denotes full transmission, without reflection and thus no standing wave, while very large values mean high reflection and standing wave pattern.
24.
An impedance mismatch can be also quantified with the standing wave ratio ( SWR or VSWR for voltage ), which is connected to the impedance ratio and reflection coefficient by : VSWR = \ frac { | V | _ { max } } { | V | _ { min } } = \ frac { 1 + | \ Gamma | } { 1-| \ Gamma | }, where \ left | V \ right | _ { min, max } are the minimum and maximum values of the voltage absolute value, and the VSWR is the voltage standing wave ratio, which value of 1 denotes full transmission, without reflection and thus no standing wave, while very large values mean high reflection and standing wave pattern.
