Return loss (RL) and Voltage Standing Wave Ratio (VSWR) are both measurements used to quantify efficiency of power transfer in radio frequency (RF) and Microwave systems. They are related but represent same information in different ways. Return Loss in dB: It is a measure of reflected power ...
It is often necessary to convert between VSWR and return loss - this can be done using simple formulas or a table provided here.
Return Loss (RL)is a amount of power that is lost to the load and returns back to the system as a reflection typically expressed in dB. A high return loss means more power is lost at the load. Loss in % (L%)is the percentage of power that is lost to the load and returns back ...
Definitions: VSWR (Voltage Standing Wave Ratio)is the measure of how efficiently RF power is transmitted and is expressed as a ratio of the maximum to minimum amplitude (or the voltage or current) of the corresponding field components appearing on a line that feeds an antenna. Return Lossis a...
vswr
, then theVSWRis defined by the following formula: The reflection coefficient is also known as s11 or return loss. See thevswr tablebelow to see a numerical mapping between reflected power, s11 and VSWR. If you don't want to go through complicated equations to understand the relationship betw...
to the incident voltage is the reflection coefficient. The worst case value for the reflection coefficient is one (1). This means that all the incident voltage is reflected back. A reflection coefficient equal to one would result in a VSWR equal to infinity (based on the formula shown above...
VSWR and its effects can be measured in several ways, including return loss, reflected power, reflection coefficient, and transmitted power loss. All of these measure the proportion of power that a mismatched antenna reflects to the transmitter, just in different ways. The reflection coefficient is...
Working backwards from the coax stub formula is it possible to determine the velocity factor of an unknown piece of coax. Simply create a coax stub filter of any known length with your suspect coax, then use the above method to measure where the main notch lies. Then use ...
the reflections from the connector assemblies do not add in-phase. Reducing the spikes in this manner requires each section of the rigid transmission line to be a different length. The length of each section is determined by the following formula: ##EQU1## where l=the length of section n,...