VSWR and Return Loss RF Calculator. RF insertion loss is the reduction in signal power as it passes through an RF component or system. 43. 6275 GHz with a −10 dB bandwidth of. It also indicates the in of forward to reflected power. It's to be noted that this VSWR calculator can also be used in the reverse direction in order to find VSWR if the. 예를 들어 Return loss가 10dB 정도라면, VSWR은 2:1 이하가 되어서 입력매칭이 비교적 잘된 경우로 평가하며, Return loss가 14 dB 정도가 되면 VSWR은 1. RF calculations and RF conversions include metric. 특히 Return loss와 VSWR의 대략적 값의 관계정도는 암기해두는게 편리할 때가 많다. This online reflection coefficient to return loss calculator calculates the return loss (dB) by entering the reflection efficient Γ (= value. Note the same numerals are used with just a shift in the decimal point. 891: 6. Return loss (RL) is the ratio of the reflected power to the incident power, in decibels (dB). 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. 0. Return Loss (dB) 3. The VSWR value range from 1. 1, for system 2 is 0. voltage standing wave ratio 020710. everything RF has and largest selection of get home for the RF and Stove Industry. Our results are optimised for gain, but others may be optimised for bandwidth. 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. Bernard Sklar, Communications Engineer and author. . Solution: From eqn. 44. number) VSWR or % Reflected Power: MHz: a wavelength in inches or feet: Get Help. If you don't have Excel you can. ElectronicsForU. 2 8. This impedance mismatch can be with a device inserted in the line or with the terminating load. 8. , some amount of incident power will reflect the source in a practical system). N -1 = previous stage. 62 GHz, and the measured return loss for the fabricated antenna was −19. This fundamental concept determines S-parameters for multi-port networks, which calculate parameters such as return loss, VSWR, and insertion loss. vswr Excel calculator. 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. They are related but measure different aspects of signal performance. Due to mismatches in impedance within the connector, some of the signal is reflected. It is specified in dB. VSWR Calculation. The input to the antenna will be 8,511 watts. com Reflections propagate back and forth in a line, but most assessments only consider the effects of the initial reflection because the back and forth energy attenuates until it is untraceable. 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. 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. reflection coefficient definition. 2. That is, the amount of signal reflected by a connector. 97dB. 8. **Note: All of our calculators allow SI prefix input. This has an online calculator that calculates VSWR based on Return Loss. When the VSWR is known, the return loss can be calculated as: Or in Excel, use the following formula: =20*LOG10 ( (I2-1)/ (I2+1))*-1. Just entry the appreciate and click calculate. Just enter the value and click calculate. At 1000 MHz, the S11 (dB) = -RL (dB) = -15 dB. Once the VSWR is known, return loss can be calculated as follows: Return Loss = 20 ∙ log10 () Generally, a higher return loss value is preferable. When someone says that the antenna is poorly matched, very often it means that the VSWR value exceeds 2 for a frequency of interest. 794But for a practical transmission system with load, there will be a small impedance mismatch that will lead to a small amount of incident power reflected back to the source. 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. com . 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. comOnce the VSWR is known, return loss can be calculated as follows: Return Loss = 20 ∙ log10 () Generally, a higher return loss value is preferable. The path loss that might be measured in a system however will not be this. Understanding the role and implications of impedance in RF transmission lines and antennas is vital to successful system performance. These calculators help with unit conversions, VSWR calculations, attenuator design, antenna design, radars, and various other basic calculations that are often required. Just enter one value and snap calculate. 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. A calculator designed to compute the VSWR, reflection coefficient, return loss and matching loss in a transmission line2. 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. This ratio represented in dB is called as Return Loss. 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. VSWR table of return loss vs. Then click the "Calculate" button next to the value you just typed to compute the others. To do so, calculate the desired return loss and subtract the known load return. Other components in a transmission line system contribute to small reflections of the RF power. As an added bonus, the. A low VSWR will minimize reflections from the antenna. everything RF have the largest selection of online calculators for of RF and Microwave Industry. Reactance Calculator. There is an equivalent definition for VSWR, which can also be expressed in terms of the Return Loss (RL). Directivity and VSWR Measurements. VSWR to Return Loss Calculator. Calculates the absolute load impedance, reflection coefficient, VSWR, return loss and mismatch loss of a load. Just enter an value and click calculate. Convert VSWR to Return Loss, Reflection Coefficient, and Mismatch Loss with our easy conversion calculator. ← Conducted RF Environments With Real RF Devices Vs. Return Loss is a measure of the amount of energy that is reflected back at a discontinuity in a Radio Frequency Circuit . A network analyzer can be used to make S parameter measurements. VSWR. 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. 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. The issue here is that when one of the traces on the NanoVNA is displaying LOGMAG (or the Base 10 logarithm of the Magnitude of the signal) it is showing you the Return Loss. 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. Source Return Loss Var1. Return Loss or a VSWR: return loss (dB) (evaluated as neg. Return loss is related to both standing wave ratio (SWR) and reflection coef-ficient (Γ). VSWR/Return Loss Calculator will find VSWR, Return Loss, Mismatch Loss, and the Reflection Coefficient given any one of the listed input types. Use the S11 value in the calculator above to find the equivalent VSWR. For example, an antenna with a VSWR of 2:1 would have a reflection coefficient of 0. Please enter your values below. everything RF has the largest selection of buy calculators for the RF and Stove Industry. This is equivalent to VSWR 5. 0 dB return loss). This is an online desktop that calculations Return Losing based on VSWR. 1 Return Loss. The reflection coefficient is calculated from the VSWR and used to compute the mismatch loss in dB as shown below. July 7, 2021 By Bill Schweber. In this situation (refer to the equations above), Γ = 1 and VSWR = 2/0 = ∞. Return Loss is a measure of the amount of energy that is reflected back at a discontinuity in a Radio Frequency Circuit . The MAX2016 outputs the difference between the two power detectors. This general RF calculator provides path loss, VSWR and wavelength as well as conversions between many common measurements used in the wireless industry. Milli Watts to dBm Calculator. The calculator on this page helps determine the loss and that can be factored into the design or RF link budget. The lower the VSWR is, the better the antenna is impedance-matched to the transmission line and the higher the power delivered to the antenna. 미스매칭 환산표 ( Return Loss - VSWR ) 고주파 회로에서의 정합성은 Return Loss(반사손실)이나 VSWR(Voltage Standing Wave Ratio, 전압정재파비)로 표시한다. 0:1 indicates perfection (there is no standing wave). VSWR Number (#:1) As you can see, higher return losses mean more power into the antenna. Reflection -10dB: 1/10 th of the RF energy is being reflected. I hope this adds to the knowledge of the. e. It is a necessary tool for designers when they want to ensure that their antennas are working correctly and performing as expected. Search for: Components MenuNote that the Insertion Loss is typically low in the desired band of frequencies, and the Return Loss is high. VSWR and Return Loss RF Calculator VSWR (Voltage Standing Wave Ratio) is a measurement of how well matched a radio transmitter and transmission line is to a load such as an antenna. VSWR to Return loss calculator. Note : It is quite possible, that other calculators deliver slightly different results. To do so, calculate the desired return loss and subtract the known load return loss. This is an online calculator this calculates VSWR based to Return Loss. Formally, S11 is the negative of return loss and. The VNAs with math modes can also directly calculate and display the resulting VSWR value. Return Loss. These reflections are very undesirable when we aim to transfer power from one. We did not sweep outside the rated bandwidth of the waveguide. This is an ideal open or short circuit, equivalent to VSWR=infinite. VSWR. 5:1. Determine how to calculate the effect of VSWR on Return Loss Understand the applications for the equation of VSWR on return loss in electronics When creating PCB prototypes that conduct alternating current (AC) at radio frequency, designs must compensate for the effects of the current waves on the prototype material. A calculator designed to compute the VSWR,return loss and matching loss in a transmission line. 1 Return Loss. . Visit Return Loss to VSWR converter>> RF Calculator #5 :Understanding VSWR and Insertion Loss Plots; Understanding Crosstalk and Isolation Plots; 40-870 And 40-830 Series RF Architectures; Calibrating RF Modules with Souriau Connector; Solid State RF Switching to 6GHz; RF Level Conversion; VSWR Interaction; VSWR to Return Loss; Power Loss Due to VSWR of Series SwitchesB at a level of -32 dBm. But the meter at the transmitter will show a VSWR of 1. The lowest value of the return loss and VSWR are found as -57. The first reflection back from each system will be the largest and subsequent reflections will be heavily attenuated, so we. dB (S 21) SWR = to 1: Insertion Loss = dB (S 21) Return Loss = dB (S 11) Return Loss = dB (S 11) NOTE: NOTE: Introduction to scattering parameters (S 11 and S 21): SWR is always greater than 1 to 1. 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. For S 11 it is also possible to display return loss and (voltage) standing wave ratio [(V)SWR] over frequency range. 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. 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. Reflection. How to improve VSWR – a simple technique to reduce mismatch; VSWR to Reflected Power ; Impedance Mismatch Calculator; VSWR from Forward and Reflected. See the vswr table below to see a numerical mapping between reflected power, s11 and VSWR. VSWR. 4. 72 0. Step 2. 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). Return loss and mismatch loss Calculator Return Loss and Mismatch Loss Calculator Calculates the absolute load impedance, reflection coefficient, VSWR, return. dl. p. Next, plug in the calculated return loss value into the formula VSWR = (1 + 10^ (RL/20))/ (1 - 10^ (RL/20)). every RF has one largest selection of online calculators for the RF and Microwave Industry. It also shows the percentage of forward to reflected power. 01. In no event will Qorvo be liable to any user of these tools for any loss or damages, including without limitation, indirect or consequential damages arising out of or associated with the use of these tools. 002 respectively as shown in table-6 for the notch width, g=1. Reflection Coef. The directivity would be limited to the corresponding return loss, 14 dB. This test determines the return loss value of each connector pair, cable component and cable to identify the problem location. 1. The first-factor ohmic loss is an unavoidable loss as it is a property of conductor used for connecting the components and the resistor used. This site comprises a comprehensive array of tutorials and related tools, including explanations, examples, references and charting. 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. 5:1 VSWR is equivalent to -13. These calculators and. This is an online calculator that calculates VSWR located on Return Loss. If you don't want to go through complicated equations to understand the relationship between VSWR, mismatch loss, s11/gamma and would like a calculator to do it for you, check out our VSWR. Return loss is always expressed in dB, which is a logarithmic scale. Power to Voltage. Return loss is a measure of how well devices or lines are matched. These measurements show the user the match of the system and if it conforms to system engineering specifications. Return Loss has surfaced in our ham world due to the new handheld antenna system analyzers like the Nano VNA and others. In contrast to Return Loss, VSWR displays the match of the system linearly. 8. The voltage standing wave ratio (VSWR) is defined. VSWR is referring to the maximum and minimum voltage values that is being transmitted and reflected by the component. 64% or ±10 x log10 (103. everything RF has and larges selection from online calculators for an RF plus Microwave Industry. 500VSWR Calculates VSWR 1. 93 dB. offices email call. To use this calculator, enter one of the following data: the voltage standing waves ratio VSWR, the return loss RL, the reflection coefficient ρ, the power ratio ρ 2, the forward and reflected power P fwd and P ref; or the impedances Z c and Z l. 43 20. As an added bonus, the results are modifiable and can calculate the other values. Calculate Effective Radiated Power (ERP) With Known Transmission Variables: Transmitter Output Power :. return loss Calculator (by using VSWR) Skin. The days of searching through desk drawers for your old HP Slide-chart tool are finally a thing of the past with the launch of MDL’s newest tool online – the Reflectometer Calculator(as shown. It including shows one percentage from forward to reflected power. It turns out that -13. Please Support RF Cafe by purchasing my ridiculously low−priced products, all of which I created. Return Loss Vs. 011. Enter the source characteristic impedance and the load impedance then press "Calculate" below. 778. 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 to VSWR. Radio Frequency Engineering Calculator. Showing 1 to 101 of 101 entries. 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. ABOUT US. " –. 43. If system 1 is a 40dB attenuator, then the return loss is essentially -10dB, as it 'masks' the S11 of system 2 by 80dB. Formula. This calculator is used to calculate the uncertainty of gain for any active RF device (mostly amplifier) that occurs because of the impedance mismatch. number) VSWR or % Reflected Power: MHz: a wavelength in inches or feet This VSWR calculator will calculate return loss, mismatch loss, loss in percentage and the reflection coefficient. ,100 % power transferred from a source to a load via a transmission line/cable). dB Path Loss with respect to dipole or isotropic antenna: Watts: dBw or dBm: microVolts: dBm: pforward (Watts) pref (Watts) Return Loss or a VSWR: return loss (dB) (evaluated as neg. com If it's electronics,. 500 1 Enter Reflected Power 4. This makes it a more direct measure of reflections than VSWR. Return Loss (dB) VSWR:An online calculator for converting between VSWR and Return Loss, Reflection Coefficient, Mismatch Loss, and Reflected Power. complimentary copy of the "RF Calculator" at . Therefore DC current would not pass through from in to out. Just enter the value and please calculating. everything RF has an largest selection of wired calculators for the RF and Microwave Industry. Note that in general S-parameters are a function of frequency (i. Return loss vs. The load can be an antenna, filter or other equipment connected to a transmission line. 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. AJ4CO Observatory Online Calculator. The MCL Microwave Calculator performs 21 calculations commonly needed by RF and microwave system designers in a wide range of applications. -30-25-20-15-10-5 0 0. Title:. VSWR is the voltage standing wave ratio it used to measure the all-types waves (example: antenna waves) during transmission. Furthermore, a small VSWR reduces reflections from the antenna. A match is good if the return loss is. 4 ms—500 forward and 500 reverse samples are collected on each cycle. Measure S11 across the desired frequency range. (under "Support" and "Technical Application Notes" tabs). 98 dB. VSWR is a function of the characteristic impedance of the transmission line and the impedance of the antenna. Calculators. return loss Calculator. Because of this, the effects of mismatch can be minimized by selecting an attenuator with the lowest possible VSWR. 7. Impedance Matching Pi Attenuator Calculator. This means return loss will always be positive. Following calculator can be used to convert VSWR to corresponding return loss (RL). Then click the "Calculate" button next to the value you just typed to compute the others. 02 dB. Reflection. A VSWR of 1:1 indicates a perfect match, meaning all power is being efficiently transferred, while higher values suggest mismatches and power loss. Measure S11 across the desired frequency range. Return loss can be measured by using microwave and RF test. 9, for system 2 is 0. Enter the Noise Figure and gain for each stage. Calculates the resistor values, attenuation, minimum attenuation, 'impedance', reflection coefficient, VSWR and return loss of a matching Pi attenuator. here is an online cascaded VSWR calculator using the RSS method. It is expressed in dB. The return loss at that point has degraded by approximately 5 dB. applied return loss and RF power, measured at 1 GHz. It tells the severity of standing waves in a transmission line. To help the engineers conducting VSWR sweeps, Lou developed the PIM and. A high return loss is desirable and results in a lower insertion loss . 1 Return loss in dB = 26. High return loss means low reflected power, so high return loss is good for a system. Gain Var5. Now, assume a "more perfect" termination of 51 ohms was used. Return loss and VSWR are two important measures of efficient power transmission and both of them can be interconverted to obtain the value of one another. Hey, this part is pretty-well matched! You lose less than 0. Return loss and insertion loss are both measurements of how a component or device affects the transmission of signals in a system. Return loss is a meas-ure of how well devices or lines are matched. The graphical reforms between return-loss, VSWR, reflection index, and mismatch loss. There is an equivalent definition for VSWR, which can also be expressed in terms of the Return Loss (RL). 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. For example, quickly compute the effect of VSWR or return loss on transmitted power; cascaded gain and noise figure for up to five amplifier stages; and power-to-voltage conversion. VSWR is defined as the maximum voltage of the standing wave (E max) to the minimum voltage of the standing wave (E min ). It is specified in decibels (dB) relative to a short circuit (100 percent rejection). Mismatch Loss (dB) 3. 05:1 it calculates a VSWR of 1. 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. Here's a plot of the loss of WR-90 X-band waveguide. 98 dB is equal to the equaivalent return loss of 1. Return loss can be measured by using microwave and RF test equipment such as a signal generator, directional coupler along with a spectrum analyser or power meter, or alternatively by using a vector network analyser. 155 dB. These parameters are often applied to antennas, RF filters and RF amplifiers such as LNA s and PA s. Following calculator can be used to convert VSWR to corresponding return loss (RL). cdn-anritsu. This test can be performed in the DTF Return Loss or DTF VSWR mode. 6 Adding VSWR to the MixT Attenuator Calculator. 0. Lower insertion loss values are preferable, indicating less signal power loss and better component/system efficiency for RF applications. Select the FREQ-RETURN LOSS using the Up/Down arrow key and press ENTER. The formula and equations used by this calculator are also provided. RF Trap With Attenuators Computes attenuation, return loss, reflection coefficient and VSWR . Convert S11 to return loss; Compute Voltage Standing Wave Ratio (VSWR) from Return Loss; References [1]. Pasternack's VSWR/Return Loss Calculator finds VSWR, Return Loss, Mismatch Loss, and the Reflection Coefficient given any one of the listed input types. This usually means that there is an impedance mismatch at the load. The ratio of the maximum to minimum voltage is known as VSWR, or Voltage Standing Wave Ratio. everything RF has the largest selection in online hand for. Moreover, return loss is the relationship between both the reflection coefficient (Γ) and the. Stripline Impedance calculator Smith charts VSWR/Return loss converter Wavelength calculator Wilkinson splitter designer. The usual function of a transmission line is to convey power from a source to a load with minimal loss. Mismatch Loss: Convert VSWR to Return Loss, Reflection Coefficient, and Mismatch Loss with our easy conversion calculator. SFDR Visualizer This VSWR calculator will calculate return loss, mismatch loss, loss in percentage and the reflection coefficient. 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 [1, 2] RLdB = 10 log Pi Pr (7. Return Loss is a amount of power that is lost to the load and does not return in to the system as a reflection. 01. USA CHINA MALAYSIA INDIA ISRAEL UNITED KINGDOM. This is an online numeric that calculates VSWR based on Return Loss. 54. 9 mm which. 99 $ = 1-Gamma^2$. Return loss quantifies the amount of reflected power, while insertion loss quantifies the loss of power as it passes through the component or device. If we look at the Return Loss chart for this. Descriptions of IL and RL with examples of how the measurements relate to the ratio of Pout to Pin, and Preflected to PinVSWR calculator Enter VSWR, Reflection Coefficient, or Return Loss to calculate remaining values: VSWR Loss Calculator This calculator is designed to give the efficiency loss of a given antenna, based on the input of VSWR: VSWR to return loss conversion Conversion tool for converting between VSWR, return loss and reflection coefficientDESIGN DATA FOR YOUR YAGI. VSWR Calculator: This is the ratio of maximum voltage to minimum voltage in standing wave pattern. VSWR to Return Loss Formula VSWR = (1 + 10-RL/20)/ (1 - 10-RL/20) Example Calculation A Return. VSWR Mismatch Errors: Both amplitude and phase errors are introduced when mismatched impedances are present at an electrical interface. In some systems this is not a trivial amount and points to the need for components with low VSWR. A simple, user-friendly RF / Microwave matching calculator that easily matches S1P and S2P files. The VSWR is a measure of the efficiency of a transmission line and is used to determine how well the line is matched to the impedance of the. Marki Microwave's Tools is a collection of free online applications for RF analysis and synthesis that are easy to use and mobile-friendly. The equivalent VSWR is 1. To use this calculator to determine the effective VSWR/Return Loss of an attenuator/device combination, enter the attenuation, VSWR or Return Loss, and Gain of the device, then press the ‘Calculate button’. This is the amount of power that is lost due to impedance mismatch, and. SFDR VisualizerVSWR & Return Loss Calculator Enter forward and reflected power or match to determine equivalent values. The VSWR is a measure of the matching of the antenna to the source and feeder cables. The Voltage Standing Wave Ratio (VSWR) is defined as the ratio of the maximum amplitude to the minimum magnitude of the voltage standing wave at an input port of an antenna. This is an online calculator that calculates Return Loss based on VSWR. 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. Return loss = 10 log (Pr / Pi) = 20 log (Er / Ei) For example, if a load has a return loss of -10 dB, then 1/10 of the incident power is reflected. A power sensor with a return loss of –23 dB is connected to a calibration source with a return loss of –20 dB. If VSWR is known, then the reflection coefficient (Γ), return loss (RL),. If “V” is used, then the ratio is defined to voltage level of a standing wave at a line. There are a number of points to. The antenna accepts a certain amount of energy delivered to it by the transmission line (characterized by S11, VSWR, or return loss), and Antenna Efficiency characterizes the amount of energy lost ‘in’ the antenna after this. This is known as mismatch loss. So, in your. Pressing the ‘Calculate’ button with no inputs will load the example below. g. The return loss is the ratio of the power of the. VSWR = ∞ is the worst condition. " – Dr. Just enter the value of source return loss, input return loss, output return loss, load return loss, device gain, and isolation then the calculator will compute the minimum and maximum gain. This formula is used to calculate the VSWR from the given return loss. VSWR Mismatch Errors: Both amplitude and phase errors are introduced when mismatched impedances are present at an electrical interface. Effects of Cable Loss in VSWR and Return Loss Measurements By Jim Norton Bird Technologies Group Applications Engineer 1 | Bird Technologies Group 866. This makes it a more direct measure of reflections than VSWR. Return loss is related to both standing wave ratio (SWR) and reflection coefficient (Γ). vary with frequency). RETURN RETURN RETURN RETURN RETURN LOSS VSWR LOSS VSWR LOSS VSWR LOSS VSWR LOSS VSWR (dB) (dB) (dB) (dB) (dB) return loss Vs. Just enter the range and click calculate. This calculator converts Return loss (RL) to Voltage Standing Wave Ratio (VSWR). Products; Applications; New Products; Product Compliance; News & Resources. Straight enter that evaluate and click calculate. We can then find the return loss as -20 * log(0. Just by entering the.