A match is good if the return loss is high. At 1000 MHz, the S11 (dB) = -RL (dB) = -15 dB. VSWR (input) : Return Loss in dB (output): Return loss calculation EXAMPLE : VSWR = 1. A VSWR value of 2 or under is typically acceptable for antennae in communications systems. See full list on allaboutcircuits. It is specified in dB. Stage: NF (dB) Gain (dB)0. Antenna efficiency is the percentage of radiated power compared to non-relected power. 1, for system 2 is 0. Home Pubs. Bernard Sklar, Communications Engineer and author. If system 1 is a cable, then it's between 8 and 14dB. This general RF calculator provides path loss, VSWR and wavelength as well as conversions between many common. ABOUT US. This test determines the return loss value of each connector pair, cable component and cable to identify the problem location. The amount delivered to the antenna is written as ( ), and is simply (1- ^2). I hope this adds to the knowledge of the. 01:1 to 3. The VSWR calculator helps in finding the reflection coefficient, return loss, and mismatch loss from the VSWR value. function doValidate_3 form { window[ cff_enabling_form ] = functi. The table shows the effects of combining two components in terms of their maximum VSWR and return loss. VSWR Return Loss Calculator. 7. VSWR is the voltage standing wave ratio it used to measure the all-types waves (example: antenna waves) during transmission. Requires Windows 7 (64 Bit) or higher. Due to mismatches in impedance within the connector, some of the signal is reflected. 1. com +1 (718) 934 4500 +1 (800) 654 7949. It turns out that -13. The measure of this reflected power is called as return loss. Please Support RF Cafe by purchasing my ridiculously low−priced products, all of which I created. Lower VSWR means lower reflection power (good impedance matching); thus, power transfers to load will be high. 6dB. RETURN RETURN RETURN RETURN RETURN LOSS VSWR LOSS VSWR LOSS VSWR LOSS VSWR LOSS VSWR (dB) (dB) (dB) (dB) (dB) return loss Vs. In the ideal case where the source, transmission line and load all have an impedance of 50 Ω the VSWR will be 1:1 (perfectly. Suppose the wave is not matched with load and signal there is some unwanted signals are interrupted or signal loss is occurred. A low VSWR will minimize reflections from the antenna. Just keep in mind that SWR and Return Loss are both indicators of the quality of the transmission line to antenna feedpoint Z match. Refl Coeff Power TransCalculate VSWR, Return Loss, Reflection Coefficient, Match Efficiency, and Net Transmission Loss from an RF broadcast transmitters forward and reflected power readings. Return Loss to VSWR. Directivity and VSWR Measurements. VSWR Calculator: This is the ratio of maximum voltage to minimum voltage in standing wave pattern. Learn about voltage standing wave ratio (VSWR), return loss, and mismatch loss, which helps characterize the wave reflections in a radio frequency (RF) design. A high VSWR indicates that there are problems with the antenna and/or transmission line, as a large amount of energy is being reflected back instead of being. It varies from 1 to (plus) infinity and is always positive. Return Loss (dB) VSWR. A match is good if the return loss is. number) VSWR or % Reflected Power: MHz: a wavelength in inches or feet: Get Help. Our results are optimised for gain, but others may be optimised for bandwidth. The first reflection back from each system will be the largest and subsequent reflections will be heavily attenuated, so we. Reflection Coef. 1. RF Trap With Attenuators Computes attenuation, return loss, reflection coefficient and VSWR . Return loss can be measured by using microwave and RF test. 4200 | Fax 408. CF 210 Cable Loss; CF 300 Cable Loss; CF 500 Cable Loss; VSWR Calculator; Waveguide Gasket Selection; Photos. Stripline Impedance calculator Smith charts VSWR/Return loss converter Wavelength calculator Wilkinson splitter designer. For example, an antenna with a VSWR of 2:1 would have a reflection coefficient of 0. Formula is:: reflection coefficient(Γ)= VSWR = VSWR Calculator:(by using RL)From the table we can understand that when the return loss is <10dB, the antenna will be at VSWR >2, indicating the system will reflect >30% power and the performance of the antenna will be <70%. SFDR VisualizerVSWR & Return Loss Calculator Enter forward and reflected power or match to determine equivalent values. Choose Conversion Calculator or Table: Convert µV to dBm Convert dBm to µV Convert Watts to dBW Convert dBW to Watts Convert Return Loss dB to VSWR Convert VSWR to Return Loss dB Convert Reflected and Forward Power to VSWR Calculate Effective Radiated Power Calculate Effective Receiver PerformanceFigure 5 shows return loss data plotted in time-domain. VSWR (input) : Return Loss in dB (output): Return loss calculation EXAMPLE : VSWR = 1. Return loss and VSWR are two important measures of efficient power transmission and both of them can be interconverted to obtain the value. How to Calculate VSWR . 1 Return loss in dB = 26. Cable insertion loss is known to be 3 dB. Electrical waves reflect when they encounter a change in the impedance of the medium they are traveling in. Enter the source characteristic impedance and the load impedance then press "Calculate" below. 011. Power to Voltage. VSWR (voltage standing wave ratio, sometimes pronounced "viswar"), is the ratio of the maximum standing wave amplitude at one node to the minimum. Consumers; Contact Us;This VSWR calculator will calculate return loss, mismatch loss, loss in percentage and the reflection coefficient. The Smith Chart Pegasus Technologies. Enter VSWR, Reflection Coefficient, or Return Loss to calculate remaining values. This calculator is designed to give the efficiency loss of a given antenna, based on the input of VSWR (voltage standing wave ratio) and other subsequent factors. It is to be reduced to VSWR = 5 by the use of a shunt loading resistor R p across the input IDT. Return loss is always expressed in dB, which is a logarithmic scale. A network analyzer can be used to make S parameter measurements. The calculator converts between return-loss, VSWR, reflection coefficient, and mismatch lost. The following equation is especially useful when using a directional power meter. This is an online numeric that calculates VSWR based on Return Loss. VSWR = Voltage standing wave ratio. return loss Calculator:(by using VSWR) Formula is:: VSWR= return loss = VSWR Calculator: This is the ratio of maximum voltage to minimum voltage in standing wave pattern. Total Cable Assy Loss: (dB) Click link at right to calculate:. The VSWR value range from 1. All of the power is reflected back. by Eamon Nash Download PDF. Calculation Select input type: Result: VSWR (pronounced "viswar"), or the Voltage Standing Wave Ratio, is the ratio of the maximum standing wave amplitude at one node to the. A VSWR of 2:1 means the maxima are twice the voltage of the minima. If you only need to convert between GAMMA, VSWR, and dB, you can ignore Zo and ZL. Measure the power levels at the input and output of your cable, convert to units of dBm, and calculate the difference. Our RF and microwave calculators and converters will provide the figures you need for your radio frequency engineering needs. Yoni Calculator Online Test System Configurator ezSample. Radio Frequency Engineering Calculator. According to the Andrew design guide, switching our rigid sections to 1. Enter Your Values. See the vswr table below to see a numerical mapping between reflected power, s11 and VSWR. Return loss and mismatch loss Calculator Return Loss and Mismatch Loss Calculator Calculates the absolute load impedance, reflection coefficient, VSWR, return. com Enter VSWR, Reflection Coefficient, or Return Loss to calculate remaining values. Measure S11 across the desired frequency range. Just by entering the VSWR the return loss can be obtained using this calculator. Calculates the resistor values, attenuation, 'impedance', reflection coefficient, VSWR and return loss of a T attenuator. High VSWR values indicate less efficient power transmission and can lead to significant. Take a look at the Return Loss chart below for one of our dual band Wi-Fi antennas which performs really well around the 2. But, for a practical system, there will be a small impedance. The VSWR is a measure of the matching of the antenna to the source and feeder cables. A high VSWR such as 10:1 usually indicates you have a problem, such as a near open or near short circuit. 12:1, which is. There is a mathematical equation to accurately calculate the VSWR of an RF system. Isolation Var6. The return loss is the ratio of the power of the. We can then find the return loss as -20 * log(0. Upon arriving back at the source, part of the reflected wave. This is equivalent to VSWR 5. A high VSWR indicates poor transmission-line efficiency and reflected energy. This calculator is designed to give the efficiency loss of a given antenna, based on the input of VSWR (voltage standing wave ratio) and other subsequent factors. Search for: Components MenuNote that the Insertion Loss is typically low in the desired band of frequencies, and the Return Loss is high. This online reflection coefficient to return loss calculator calculates the return loss (dB) by entering the reflection efficient Γ (= value. 05:1 it calculates a VSWR of 1. The formula for insertion loss in decibels (dB) is: Insertion Loss (dB) = 10 * log10 (Pin / Pout) Where: Pin is the input power or signal level. Calculate FAQs How do you calculate insertion loss? Insertion loss can be calculated by measuring the power or signal level before and after a component, device,. To do so, calculate the desired return loss and subtract the known load return loss. When we refer to return loss and transmission loss on Microwaves101, we use these equations: Return loss = -20 x log [mag ()] Transmission loss = -20 x log [mag ()] This effectively means that for passive devices, return loss expressed in dB is a positive number, because the reflection coefficient is less than unity. Showing 1 to 101 of 101 entries. 8 GHz marks. This is because the parasitics of lumped elements tend to kill the frequency response as you go higher in frequency. $ = \Gamma^2 = 10^{-RL/10}$ Power transmitted ratio for system 1 is 0. They are related but measure different aspects of signal performance. Archive Documentation Data Software. 54. The ideal condition, whereFigure 2: VSWR Measurement Principle The return loss at the input and output ports can be calculated from the respective reflection coefficients as follows: Input return loss (RL IN) is a scalar measure of how close the actual input impedance of the network is to theAn unfeasible VSWR of 50 reflects 92. Author: Marki Engineering Created Date: 11/24/2009 10:57:28 AM. When an ideal match is not encountered by the incident (forward) wave, part of it is coupled to the load and part is reflected back to the source. It's located in our download area . Reflection Coefficient to Impedance Converter Convert a reflection coefficient in Magnitude Angle format into Impedance and vice versa. The loss goes to infinity at the lower cutoff frequency. Note the same numerals are used with just a shift in the decimal point. 00Watts Enter 1. This makes it a more direct measure of reflections than VSWR. To calculate the Return Loss, add 1 to the VSWR and divide the result by the VSWR minus 1. Return Loss (dB) = 10 x Log ( Pr / Pf ) Match Efficiency (%) = 100% x (1 - Pr / Pf)A calculator designed to compute the VSWR, reflection coefficient, return loss and matching loss in a transmission lineA calculator designed to compute the VSWR,return loss and matching loss in a transmission line. For. Qorvo Interactive Tools & Calculators. Enter the Noise Figure and gain for each stage. Convert VSWR to Return Loss and vice versa. Do y. Return loss is a measure of how well devices or lines are matched. 0:1). 011. Coaxial Photos;. and VSWR can be calculated using the equation: Test Results. VSWR-to-Return Loss CalculatorThe two DTF graphs are the same except for the return loss value at marker 1. Straight enter that evaluate and click calculate. 1Thus, for this system, VSWR = 1:1 (i. P%REF = (VSWR - 1)² / (VSWR + 1)² x 100. Thus with ~ 25% reflected power: Return Loss = -10 x Log [ 100/25. 1) (7. 64/100) = ±0. They will show SWR and Return Loss (RL). This application note supplies a free of charge software tool that can e. Return Loss or a VSWR: return loss (dB) (evaluated as neg. A calculator designed to compute the VSWR, reflection coefficient, return loss and matching loss in a transmission line2. SFDR Visualizer This VSWR calculator will calculate return loss, mismatch loss, loss in percentage and the reflection coefficient. These reflections are very undesirable when we aim to transfer power from one. Note, that in this conversion to return loss all phase information is lost. Step 1. complimentary copy of the "RF Calculator" at . What is a Vswr To Rl? VSWR (Voltage Standing Wave Ratio) to RL (Return Loss) is a conversion used in radio frequency (RF) engineering to measure the efficiency of power. 2 to 12. Find VSWR (Voltage Standing Wave Ratio), Return Loss, Mismatch Loss, and the Reflection Coefficient given any one of the listed input types. 93 dB. Return loss is a measure in dB of the ratio of power in the incident wave to that in the reflected wave, and we define it to have a negative value. To do this, I start at the input port and re-calculate the return loss for each component, factoring in the insertion loss of the previous components in the chain, as they will help improve the component's VSWR further down the chain:. g. Reflection Calculator: RL = dB: VSWR = Γ = VSWR = RL = dB: Γ = Zo . Conclusion : In summary, RL and VSWR formulas and calculators are valuable tools that enhance the efficiency. VSWR and impedance, Part 2: Reflected power. Return loss, also known as reflection loss, is a measure of the fraction of available power that is not delivered by a source to a load. A calculator designed to compute the VSWR,return loss and matching loss in a transmission line. Just enter one value and snap calculate. 62 GHz, and the measured return loss for the fabricated antenna was −19. In summary, return loss is the loss of signal power due to signal reflection or return by a discontinuity in a fiber-optic link or transmission line. Voltage Standing Wave Ratio (VSWR) is defined as the ratio of the maximum to the minimum voltage on a loss-less line. How to Calculate VSWR . If our directional coupler had perfect isolation, the return loss of the load would equal the difference between the reflected and forward measurements:. -30-25-20-15-10-5 0 0. See the relationship between VSWR and return loss. VSWR Mismatch Errors: Both amplitude and phase errors are introduced when mismatched impedances are present at an electrical interface. Just enter the value and click calculate. Just enter the value and click calculate. This VSWR calculator will calculate return loss, mismatch loss, loss in percentage and the reflection coefficient. You can use our VSWR calculator to see that 1. 0. everything RF has this largest selection about online calculators for the RF and Cooking Industry. The Reflection Coefficient can be calculated from return loss by using the following formula. Return Loss (dB) 3. sales@minicircuits. A01TKL_ RF Inductor by Coilcraft →. 891: 6. We use an interpolation approach. The return loss of a system is defined as the ratio of incident power to reflected power and is measured in dB. A VSWR of 1:1 means that there is no power being reflected back to the source. 98 dB return loss. Then click the "Calculate" button next to the value you just typed to compute the others. Coupling to Direct Line Insertion Loss Conversion Table for Directional Couplers. Calculates will find VSWR, Return Loss, Mismatch Loss, and the Reflection Coefficient given any one of the listed input types. As an added bonus, the results are modifiable and can calculate the other values. Conversion Tables. Input Return Loss Var2. 5:1. A table of convenient values are presented at the bottom. Conclusion : In summary, RL and VSWR formulas and calculators are valuable tools that enhance the efficiency. This tool calculates the Return loss in dB. Calculate the VSWR and Reflection Coeffecient on the parameters you enter using Elite RF's Calculator. This can be built into a FLEXI-BOX and a transmission line PCB is available which easily adapts for this circuit with one simple trimming operation. 0 10. 3) RLOUT = 20log10|S22| dB (Eq. 2) is considered excellent in most cases. This part looks at the closely related. Return Loss is the amount of power that is lost in the signal returned/reflected by a discontinuity in a transmission line. Given a return loss (variable = RL ) in dB, the VSWR is calculated as follows: The magnitude of the reflection coefficient is defined as Rho , where Rho = ( 10 ^ (RL/-20)): e. While return loss analysis can be an ambiguous quality indicator, Distance To Fault (DTF) analysis highlights the problem clearly. A simple, user-friendly RF / Microwave matching calculator that easily matches S1P and S2P files. Because of this, the effects of mismatch can be minimized by selecting an attenuator with the lowest possible VSWR. Not responsible for errors. Transmission Power. SFDR Visualizer Return loss and insertion loss are both measurements of how a component or device affects the transmission of signals in a system. This calculator converts between return loss (RL), voltage standing wave ration (VSWR), and reflection coefficient (Γ). Provided for convenience only. Simply enter the value and click calculate. 1-800-761-3041 Contact Account Cart Search Waveform. It is expressed in dB - A high return loss means more power is lost at the load. 1 Return Loss. RF insertion loss is the reduction in signal power as it passes through an RF component or system. The table is created by plotting VSWR values against the corresponding return loss values. In some systems this is not a trivial amount and points to the need for components with low VSWR. Calculates the resistor values, attenuation, minimum attenuation, 'impedance', reflection coefficient, VSWR and return loss of a matching Pi attenuator. The term ‘forward power is synonymous with powered deliver to the load, or thru power. Mismatch Loss: Convert VSWR to Return Loss, Reflection Coefficient, and Mismatch Loss with our easy conversion calculator. VSWR Number (#:1) As you can see, higher return losses mean more power into the antenna. 72 0. return loss Calculator (by using VSWR) Skin. Click here to go go to our main page on VSWR We offer an Excel spreadsheet that will help you visualize how voltage standing waves are created. VSWR =. 50 from 6 votes. The voltage standing wave ratio (VSWR) is defined. vswr Excel calculator. It is specified in decibels (dB) relative to a short circuit (100 percent rejection). 43 20. Products. Solution: First the VSWR figures are converted to reflection coefficient magnitudes: Then the mismatch uncertainty is: M u = ±200 (0. This ratio can also be measured in dB, and expressed as Return Loss. Return Loss is a amount of power that is lost to the load and does not return in to the system as a reflection. Always expressed as a ratio to unity, a VSWR of 1. Formally, S11 is the negative of return loss and has. The method generally makes sense in that the return loss, or VSWR, performance of each element in a transmission system additively degrades the system return loss. As the VSWR increases, the quality of the match deteriorates and more power is reflected back. ,100 % power transferred from a source to a load via a transmission line/cable). Enter the return loss, VSWR or reflection coefficient using drop-down menu to calculate how much power is reflected from or delivered to the load and mismatch loss. This is equivalent to VSWR 5. It is expressed in dB. Return loss, also known as reflection loss, is a measure of the fraction of power that is not delivered by a source to a load. If the power incident on a load is Pi P i and the power reflected by the load is Pr P r, then the return loss in decibels is [6, 7] RLdB = 10 log Pi Pr (2. reflection coefficient definition. —and calculates both the typical system return loss along with the worst case return loss. The power reflected back from an antenna is specified using either the voltage standing wave ratio (VSWR) or the reflection coefficient (also referred to as return loss). Since the signal velocity through the network is a known constant, like the sound velocity in our analogy above, the time it takes for the reflections or echoes to return can be converted to distance. dBm to Milli Watts Calculator. 3333. 0 dBFor our measurements we replace the antenna with a 50 ohm termination (vswr 1. A table of convenient values are presented at the bottom. Pressing the ‘Calculate’ button with no inputs will load the example below. If VSWR is known, then the reflection coefficient (Γ), return loss (RL),. Reflected power ratio for system 1 is 0. 091) (0. S-parameters are a valuable tool for calculating reflection coefficients and transmission gains for a two-port network's input and output sides. An example of this would be a. The graph below shows input return loss for an amplifier. The VSWR/Return Loss Calculator will find VSWR, Return Loss, Mismatch Loss, and the Reflection Coefficient based on any one of the listed inputs. 4. Lower insertion loss values are preferable, indicating less signal power loss and better component/system efficiency for RF applications. 4 GHz. Moreover, return loss is the relationship between both the reflection coefficient (Γ) and the. The return loss of a system is defined as the ratio of incident power to reflected power and is measured in dB. With this equation, you can plug in the value of D and the measured voltages, and finally solve the above. 51 dB, and a return loss of 9. This test can be performed in the DTF Return Loss or DTF VSWR mode. Effects of Cable Loss in VSWR and Return Loss Measurements By Jim Norton Bird Technologies Group Applications Engineer 1 | Bird Technologies Group 866. Select a Choice*. In an RF system, when power is sent from the source to load, there are three main parameters to be considered: (1) incident power. 또한 안테나의 경우도 실무상에서 Return loss보다는 VSWR로써 비교할 때 좀더 실질적인 비교가 가능하기도 하다. 0:1,. Return Loss or a VSWR: return loss (dB) (evaluated as neg. High return loss means low reflected power, so high return loss is good for a system. In summary, return loss is the loss of signal power due to signal reflection or return by a discontinuity in a fiber-optic link or transmission line. Γ = Reflection coefficient. This is an online calculator that calculates VSWR based on Get Loss. Given a return loss (variable = RL ) in dB, the VSWR is calculated as follows: The magnitude of the reflection coefficient is defined as Rho , where Rho = ( 10 ^ (RL/-20)): e. It also indicates the in of forward to reflected power. REGISTER. An online calculator for converting between VSWR and Return Loss, Reflection Coefficient, Mismatch Loss, and Reflected Power. In contrast to Return Loss, VSWR displays the match of the system linearly. If “V” is used, then the ratio is defined to voltage level of a standing wave at a line. LR = Return loss in decibels. 5. narrowband components) should provide a system worst case of 18dB return loss. Return loss (RL) is the ratio of the reflected power to the incident power, in decibels (dB). This online reflection coefficient to VSWR calculator calculates the VSWR by entering the reflection efficient Γ (= value between 0 & 1). Thus, the 55-ohm termination contributed 26 dB loss to the inherent 6 dB loss of a two-way splitter. Note: The historical definition of return loss results in a negative sign. As an added bonus, the results are modifiable and can calculate the other values. When using VSWR and Reflection Coefficient it is often encessary to use formulas or equations to determien the values. Stripline Impedance calculator Smith charts VSWR/Return loss converter Wavelength calculator Wilkinson splitter designer. everything RF has the big selection of get calculators for the RF and Microwave Industry. 0 Frequency (GHz) Return Loss (dB) Return Loss (dB) Figure 5 A VSWR plot, to the uninitiated, can be a very confusing plot. Loss factor. Return loss is always expressed in dB, which is a logarithmic scale. There is also a selection of suitable RF. VSWR to Return Loss Conversion Table. In an RF system, when power is sent from the source to load, there are three main parameters to be considered: (1) incident power. When you look at a graph of a return loss formula, the negative sign is often omitted and is sometimes used interchangeably with the S11 parameter. Return Loss is the portion of a signal that is lost due to a reflection of power at a line discontinuity. Convert the VSWR value to a ratio by subtracting 1 from the VSWR value. Both decimal point and comma are ok. This calculator is specific to the circuit used in the RF Trap With Attenuators FLEXI-BOX. Convert VSWR to Return Loss, Reflection Coefficient, and Mismatch Loss with our easy conversion calculator. 1-800-761-3041 Contact Account Cart Search Waveform. As an added bonus, the results are modifiable and can calculate the other values. Particularly, reflected power and mismatch loss help describe the need for the antenna (with its matching network) the provide a suitability return loss the the active electronics. everything RF has the largest selection of buy calculators for the RF and Stove Industry. Now, let us investigate the physical meaning of return loss. 8. This impedance mismatch can be with a device inserted in the line or with the terminating load. Assuming that the source and load are perfect then when the signal from the source arrives at the switch some of that signal is reflected. The path loss that might be measured in a system however will not be this. A Forward and Reflected Power to VSWR Calculator is a tool that helps to determine the Voltage Standing Wave Ratio (VSWR) of a transmission line by using measurements of the forward and reflected power. These multiple solutions are possible because each contributor is a vector having both. The relation between VSWR and Return Loss :. everything RF has and largest selection of get home for the RF and Stove Industry. 92 dB 0. In this context, the term S-parameters or. A series of RF calculators for radio frequency engineers. Cascaded Output IP3: O i P 3 C = 1 1 I P 3 N − 1 ⋅ G N + 1 I P 3 N [ m W] I P 3 C = 10 ⋅ l o g ( I P 3 C) [ d B m] C = cumulative up to and including stage N. 868. There is an equivalent definition for VSWR, which can also be expressed in terms of the Return Loss (RL). Matching Pi Attenuator Calculator. Reflection Coef. You would think this answers the question. dl. Calculations Pathloss / RSSI; Missmatch Loss; IP3 / SFDR Calculator; IP3, IP2, 1dB Comp. 43. VSWR/Return Loss Calculator will find VSWR, Return Loss, Mismatch Loss, and the Reflection Coefficient given any one of the listed input types. 14 dB per hundred feet. As we know that the reflection coefficient defines the amount of the electromagnetic wave is reflected due to the impedance discontinuity in a transmission path. There are a number of points to. everything RF has the largest selection of online calculators for the RF and Microwave Industry. This is an online desktop that calculations Return Losing based on VSWR. A VSWR of 1:1 indicates a perfect match, meaning all power is being efficiently transferred, while higher values suggest mismatches and power loss. If the antenna reflects 250 watts the VSWR at the antenna will be 1. As we know that the reflection coefficient defines the amount of the electromagnetic wave is reflected due to the impedance discontinuity in a transmission path. When a transmitted wave hits a boundary such as the one between the lossless transmission line and load (Figure 1), some energy will be transmitted to the. This reduction of signal, also called attenuation, is directly related to the length of a cable—the longer the cable, the greater the insertion loss. Step 2. Forward. To help the engineers conducting VSWR sweeps, Lou developed the PIM and. How to improve the Return Loss of an amplifier. As an added bonus, the results are modifiable and can calculate the other values. VSWR ( VSWR meaning Voltage Standing Wave Ratio) is an important concept in radio frequency (RF) engineering. In some systems this is not a trivial amount and points to the need for components with low VSWR. VSWR, or the Voltage Standing Wave Ratio, is the ratio of the maximum. The return loss is the proportion of a signal that is reflected as a result of an impedance mismatch. (under "Support" and "Technical Application Notes" tabs). Particularly, reflected power and mismatch loss help describe the need for the antenna (with its matching network) to provide a suitable return loss to the active electronics. Please enter your values below.