Total Cable Assy Loss: (dB) Click link at right to calculate:. e. com . In Figure 14, the ADL5920 is being used to measure the return loss of the load, also at 1 GHz. everything RF has the largest selection in online hand for. Output Return Loss Var3. Calculations Pathloss / RSSI; Missmatch Loss; IP3 / SFDR Calculator; IP3, IP2, 1dB Comp. ☯ Return Loss=20log 10 (VSWR+1/VSWR-1) (dB)A calculator designed to compute the VSWR, reflection coefficient, return loss and matching loss in a transmission lineIt is the ratio between transmitted and reflected waves. Coaxial Photos;. 3) RLOUT = 20log10|S22| dB (Eq. Return loss is related to both standing wave ratio (SWR) and reflection coef-ficient (Γ). High VSWR values indicate less efficient power transmission and can lead to significant. 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. microwaves101. Put a decent isolator in your signal chain (typically ~1 dB insertion loss, >10 dB return loss and > 20 dB reverse isolation over relevant bandwidth) and subsequent VSWRs won't matter either. $ = \Gamma^2 = 10^{-RL/10}$ Power transmitted ratio for system 1 is 0. 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. Here's a simple VSWR calculator. The losses are due to copper losses/skin loss and for more esoteric antennas (planar types) it's usually dielectric loss. For five t-line sections each having a VSWR of 1. 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. Measurement and control of gain and reflected power in wireless transmitters are critical auxiliary functions that are often overlooked. VSWR and Return Loss RF Calculator. Just by entering the VSWR the return loss can be obtained using this calculator. 8. total RF has the largest selection of online calculators for the RF and Micro Industry. 333, a mismatch loss of 0. Formula is:: reflection coefficient (Γ)=. Use the S11 value in the calculator above to find the equivalent VSWR. This VSWR / Return Loss calculator allows you to compute corresponding VSWR, Return Loss, Reflection coefficient and Mismatch Loss values for the entered input value and input type. A good VSWR to aim for is at least 1. Enter a value for VSWR (remember: VSWR should be a number larger than 1. It is often expressed in terms of a percentage, or in dB. VSWR table of return loss vs. Reflection Coef. Reactance Calculator. VSWR Return Loss Calculator. A power meter may also be used to calculate cable loss. 98dB = 96. There is a mathematical equation to accurately calculate the VSWR of an RF system. This impedance mismatch can be with a device inserted in the line or with the terminating load. VSWR to Return Loss . However, each field, when changed will allow. If VSWR is known, then the reflection coefficient (Γ), return loss (RL),. There is an equivalent definition for VSWR, which can also be expressed in terms of the Return Loss (RL). Just enter the value and click calculate. 1) RL dB = 10 log P i P r. dBm To Watt Calculator; Noise Factor to Noise Figure Calculator; Noise Temperature to Noise Figure Converter;where RL(dB) is the return loss in dB, Pi is the incident power and Pr is the reflected power. If we look at the Return Loss chart for this. Part 1 of this article looked at the basics of impedance matching and power transfer. VSWR to Return loss calculator. 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. These measurements show the user the match of the system and if it conforms to system engineering specifications. This is the amount of power that is lost due to impedance mismatch, and. The reflection coefficient is calculated from the VSWR and used to compute the mismatch loss in dB as shown below. VSWR (:1) Return Loss (dB) Reflection Coefficient (Γ) Mismatch loss (dB) Reflected Power (%) Through Power (%) VSWR / Return Loss Calculator. Step 2. Please Support RF Cafe by purchasing my ridiculously low−priced products, all of which I created. N -1 = previous stage. This test determines the return loss value of each connector pair, cable component and cable to identify the problem location. Now, let us investigate the physical meaning of return loss. vswr Excel calculator. Pout is the output power or signal level. VSWR to Return Loss Conversion Table. With this calculator, you can calculate the final improved VSWR value when attenuation is inserted between the source and the load impedance that initially do not have a 50 Ohm match. The following formula is used to calculate the Return Loss (RL) from Voltage Standing Wave Ratio (VSWR). Return Loss in dB What It Means VSWR Number; 0 dB: 100% reflection, no power into the antenna, all reflected back: Infinite: 1 dB: 80% reflection, 20% power into the antenna: 17: 2 dB: 63% reflection, 37% power into the antenna: 9:The Reflectometer Calculatorallows engineers to input any one of three known values, (Reflection Coefficient (p), VSWR or Return Loss), to . Directivity and VSWR Measurements. VSWR is a function of the characteristic impedance of the transmission line and the impedance of the antenna. 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's located in our download area . SFDR Visualizer Return loss and insertion loss are both measurements of how a component or device affects the transmission of signals in a system. ABOUT US. Input Value: Calculate Reset Definition of VSWR "Understanding VSWR isn't just about crunching numbers; it's about shaping the future of efficient wireless communication. It provides a measure of how efficiently RF power is transmitted from a power source, through a transmission line, to a load such as an antenna. Unless you have a piece of slotted line-test equipment this is a hard definition to use, especially since the concept of voltage. This general RF calculator provides path loss, VSWR and wavelength as well as conversions between many common. Upon arriving back at the source, part of the reflected wave is coupled back. VSWR to Return Loss (dB) Calculator. VSWR =. VSWR to Return Loss (dB) Converter; Return Loss (dB) to VSWR Converter; Power Conversion : dBm - volts - watts; Phase Noise to Phase Jitter Converter; Phase Jitter to Phase Noise Converter; ppm to Hz Converter; misc. 5:1 VSWR is equivalent to -13. 3 dB. 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. Straight enter that evaluate and click calculate. In general, a lower VSWR means a system and load is well matched with most of the power being radiated by the antenna and a relatively small amount reflected back. 794 VSWR to Return Loss (dB) Converter; Return Loss (dB) to VSWR Converter; Power Conversion : dBm - volts - watts; Phase Noise to Phase Jitter Converter; Phase Jitter to Phase Noise Converter; ppm to Hz Converter; misc. As an example, if the return loss of the amplifier is 4 dB, use the calculator below. This can and online calculator that calculates VSWR based on Return Loss. 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. With this equation, you can plug in the value of D and the measured voltages, and finally solve the above. This is an online calculator is calculates VSWR based on Return Loss. e. Return loss and VSWR are two important measures of efficient power transmission and both of them can be interconverted to obtain the value. Thus, the 55-ohm termination contributed 26 dB loss to the inherent 6 dB loss of a two-way splitter. VSWR = Voltage standing wave ratio. Marki Microwave's Tools is a collection of free online applications for RF analysis and synthesis that are easy to use and mobile-friendly. 868. The graphical reforms between return-loss, VSWR, reflection index, and mismatch loss. Title:. Assuming the systems have no internal loss. Home Pubs. Calculations Pathloss / RSSI; Missmatch Loss; IP3 / SFDR Calculator; IP3, IP2, 1dB Comp. com Enter VSWR, Reflection Coefficient, or Return Loss to calculate remaining values. This VSWR calculator will calculate return loss, mismatch loss, loss in percentage and the reflection coefficient. USA CHINA MALAYSIA INDIA ISRAEL UNITED KINGDOM. everything RF has and largest selection of get home for the RF and Stove Industry. Furthermore, a small VSWR reduces reflections from the antenna. everything RF has and larges selection from online calculators for an RF plus Microwave Industry. 92 dB 0. Both traces simply need to be set to take their data from the S11 Reflected Channel. com1) VSWR Calculation. Antenna efficiency is the percentage of radiated power compared to non-relected power. 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. Now, assume a "more perfect" termination of 51 ohms was used. Now VSWR is 1. VSWR to Return Loss (dB) Converter; Return Loss (dB) to VSWR Converter; Power Conversion : dBm - volts - watts; Phase Noise to Phase Jitter Converter; Phase Jitter to Phase Noise Converter; ppm to Hz Converter; misc. A calculator designed to compute the VSWR,return loss and matching loss in a transmission line. Particularly, reflected performance and mismatch loss help delineate the need for the antenna (with its matching network) to offer a suitable return loss to the active electrical. The return loss scale is normally set up from 0 to 60 dB with 0 being an open or a short and 60 dB would be close to a perfect match. To calculate the Return Loss, add 1 to the VSWR and divide the result. This fundamental concept determines S-parameters for multi-port networks, which calculate parameters such as return loss, VSWR, and insertion loss. Calculate. To do so, calculate the desired return loss and subtract the known load return loss. VSWR - Return Loss - Γ Conversions These are the standard set of equations for converting between VSWR, return loss, and reflection coefficient (Γ). 0708,min,max = =This is an online calculator that calculates Return Loss based on VSWR. The term ‘forward power is synonymous with powered deliver to the load, or thru power. Hence, the return loss is always lower than the ideal system (i. The ratio of the input to the reflected signal is. 12] = 6 dB. ZoReturn Loss = incident power/ reflected power. Measure S11 across the desired frequency range. See the vswr table below to see a numerical mapping between reflected power, s11 and VSWR. The calculator is a spreadsheet that accepts VSWR specifications for all the components in your RF Path—tower mounted amplifiers, diplexers, bias tees, etc. Convert VSWR to Return Loss and vice versa. This is a measurement of how much energy is either radiated or is dissipated in heat, due to resistive or dielectric losses. 98 dB is equal to the equaivalent return loss of 1. However, each field, when changed will allow. This is an ideal open or short circuit, equivalent to VSWR=infinite. everything RF have the largest selection of online calculators for of RF and Microwave Industry. 2) is considered excellent in most cases. 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. A commonly required conversion is between return loss and VSWR, and some values are tabulated in chart, along with a graph of these values for quick reference. 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. number) VSWR or % Reflected Power: MHz: a wavelength in inches or feet: Get Help. Here are some examples of the logarithmic scale, or loss in decibels: Return Loss & VSWR Table. In order to improve the VSWR, this calculator also has an extra input for adding an attenuator to improve or reduce the system VSWR. This has an online calculator that calculates VSWR based on Return Loss. Click Here To Download Product Brochure. Please Support RF Cafe by purchasing my ridiculously low−priced products, all of which I created. 2 8. It is a natural phenomenon that occurs for any type of transmission—whether it's electricity or data. 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. Return Loss and Mismatch Loss Calculator. If the antenna reflects 250 watts the VSWR at the antenna will be 1. I have already calculated the cascaded VSWR and RL using the RSS method (very similar result to simply multiplying each components VSWR as Itay mentioned), but the problem is that the result is not even close to the measured value of return loss. 778. This calculator allows you to calculate the input impedance of a transmission line, as well as the VSWR, return loss, and mismatch loss at the input point. These calculators and. 5:1. VSWR (input) : Return Loss in dB (output): Return loss calculation EXAMPLE : VSWR = 1. Calculates the resistor values, attenuation, 'impedance', reflection coefficient, VSWR and return loss of a Pi attenuator. Return loss vs. RF calculations and RF conversions include metric. 1Thus, for this system, VSWR = 1:1 (i. dBm to Milli Watts Calculator. Note that in general S-parameters are a function of frequency (i. See the relationship between VSWR and return loss. Solution: First the VSWR figures are converted to reflection coefficient magnitudes: Then the mismatch uncertainty is: M u = ±200 (0. The return loss vs. This online reflection coefficient to return loss calculator calculates the return loss (dB) by entering the reflection efficient Γ (= value. everything RF possessed the largest selection of online numerical for who RF also Nuke Industry. The first reflection back from each system will be the largest and subsequent reflections will be heavily attenuated, so we. 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. That's all for now!Home / Blog Posts / VSWR, Return Loss, Insertion/Transmission loss vs. Measuring Insertion Loss using RETURN LOSS MODE. 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. VSWR is the voltage standing wave ratio it used to measure the all-types waves (example: antenna waves) during transmission. Input Return Loss Var2. Calculations Pathloss / RSSI; Missmatch Loss; IP3 / SFDR Calculator; IP3, IP2, 1dB Comp. It is specified in dB. 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. Low-pass lumped element filters. Radio Frequency Engineering Calculator. Formally, S11 is the negative of return loss and has. 1. It varies from 1 to (plus) infinity and is always positive. everything RF has the largest selection of online calculators for the RF and Microwave Industry. G = Gain. —and calculates both the typical system return loss along with the worst case return loss. Return loss load -2. 1. This is an online conversion tool for converting between VSWR, return loss and reflection coefficient, which are different ways to express how well a load is matched to a source. 25 on the worst path and the insertion loss is 0. This video provides a basic introduction to voltage standing wave ratio (VSWR) and return loss, and explains how these measurements are used in radio frequen. 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. VSWR table of return loss vs. The VSWR value range from 1. This makes it a more direct measure of reflections than VSWR. everything RF has aforementioned largest selection of online calculators for of RF and Microwave Industry. ← Conducted RF Environments With Real RF Devices Vs. Not responsible for errors. At 1000 MHz, the S11 (dB) = -RL (dB) = -15 dB. 891: 6. Mismatch Loss: Reflected Power Through Power (dB) Coefficient, Γ (dB) (%) (%) 1 17. We use an interpolation approach. reflection coefficient definition. 5), which will give us 6. As an added bonus, the results are modifiable and can calculate the other values. Mismatch Loss (dB) 3. The VSWR can easily be converted into Return Loss ( RL R L ) using the following formula: RL = 20log10(VSWR + 1 VSWR − 1) R L = 20 log 10 ( V S W R + 1 V S W R − 1) Directional power meter. As an added bonus, the results are modifiable and can calculate the other values. 0 or the results don't mean anything!). 9, for system 2 is 0. In contrast to Return Loss, VSWR displays the match of the system linearly. High return loss means low reflected power, so high return loss is good for a system. VSWR is defined as the ratio of the maximum to minimum voltage on a loss-less transmission line (expressed as 3. VSWR is a measure of the reflected power on a transmission line. Reflected Power. 5:1. This application note supplies a free of charge software tool that can e. Q. According to the Andrew design guide, switching our rigid sections to 1. everything RF has the largest selection of buy calculators for the RF and Stove Industry. Just enter the value additionally mouse calculate. Calculators. A commonly required conversion is between return loss and VSWR, and some values are tabulated in chart, along with a graph of these values for quick reference. It is expressed in dB. —and calculates both the typical system return loss along with the worst case return loss. Usually this is the threshold when most devices are considered. The equivalent VSWR is 1. Assuming the systems have no internal loss. That is, the amount of signal reflected by a connector. 14 dB per hundred feet. 79. If we measure the power of a reflected signal from an antenna near a radio transmitter, the measurement of the reflected signal’s amplitude at this juncture compared to the initially transmitted. But the meter at the transmitter will show a VSWR of 1. 58 dB in return loss. Please check for yourself using appropriate formula. VSWR Calculator: This is the ratio of maximum voltage to minimum voltage in standing wave pattern. 1) (7. How to improve VSWR – a simple technique to reduce mismatch; VSWR to Reflected Power ; Impedance Mismatch Calculator; VSWR from Forward and Reflected. 6 Adding VSWR to the MixT Attenuator Calculator. VSWR specs (specifications) are introduced, along with formulas for mismatch loss and return loss in relationship to VSWR. Find VSWR (Voltage Standing Wave Ratio), Return Loss, Mismatch Loss, and the Reflection Coefficient given any one of the listed input types. This calculator computes the VSWR, reflection coefficient, return loss and matching loss in a transmission line. The low-pass filter often is a natural choice for lumped element filters. Conversion Formulas. Note : It is quite possible, that other calculators deliver slightly different results. Channel Emulators/Simulators. Products. RF Calculators. 0 is the minimum. VSWR / Return Loss Calculator. Our results are optimised for gain, but others may be optimised for bandwidth. When using VSWR and Reflection Coefficient it is often encessary to use formulas or equations to determien the values. Return Loss. For VSWR=2, reflection coefficient will be=1/3 and 20log (1/3) =-9. 2. The MAX2016 outputs the difference between the two power detectors. The loss goes to infinity at the lower cutoff frequency. g. Enter the source characteristic impedance and the load impedance then press "Calculate" below. every RF has one largest selection of online calculators for the RF and Microwave Industry. This calculator converts values between VSWR, Return loss, Reflection Coefficient and Mis-Match 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. This is because the parasitics of lumped elements tend to kill the frequency response as you go higher in frequency. Lower VSWR means lower reflection power (good impedance matching); thus, power transfers to load will be high. cdn-anritsu. Bernard Sklar, Communications Engineer and author. What is the actual antenna VSWR or return loss?You can calculate return loss when the VSWR is known. Requires Windows 7 (64 Bit) or higher. g. 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. 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. In general, a lower VSWR means a system and load is well matched with most of the power being radiated by the antenna and a relatively small amount reflected. Provided for convenience only. Forward Power (dBm)Return loss tells you how much of the input signal is reflected. vary with frequency). With the initial values in place, you need only click on Calculate. Coupling to Direct Line Insertion Loss Conversion Table for Directional Couplers. 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 (pronounced "viswar"), or the Voltage Standing Wave Ratio, is the ratio of the maximum standing wave amplitude at one node to the minimum amplitude at another node in a system. e. 05:1 it calculates a VSWR of 1. Pasternack's RF calculators and conversions section provides engineers valuable and easy-to-use tools ranging from complex mathematical formulas to simple conversions. Γ = (VSWR – 1)/(VSWR + 1) Return Loss (dB) = -20*Log 10 (|Γ|) Mismatch Loss (dB) = -10*Log 10 (1. The table below converts between VSWR, return loss, reflection coefficient, mismatch loss, reflected power and through power. Learn about voltage standing wave ratio (VSWR), return loss, and mismatch loss, which helps characterize the wave reflections in a radio frequency (RF) design. 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). VSWR specs (specifications) are introduced, along with formulas for mismatch loss and return loss in relationship to VSWR. This is known as mismatch loss. Some are based on look-up tables, some completely hide their algorithms. We did not sweep outside the rated bandwidth of the waveguide. 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’. The path loss that might be measured in a system however will not be this. P%REF = (VSWR - 1)² / (VSWR + 1)² x 100. Note: impedance is a complex quantity, it has real and imaginary parts or magnitude and phase; instruments are almost always calibrated for Zo being some nominal real value, is Xo=0 (eg when people speak of a 50Ω instrument, that means 50+j0Ω even if they don't. Dieser is an online calculator that calculates Return Hurt based on VSWR. 1 Thus, for this system, VSWR = 1:1 (i. VSWR. Return Loss Calculator: RF-Calkulator: Single Layer Air Core Inductor Design, ON4AA: Sophisticated Helix Antenna Design: The Quarter-wave stub, LA8OKA: Types of Coax Cable and Line Loss: The self-inductances are calculated: VSWR calculator: VSWR Loss Calculator: VSWR to return loss conversion: Waveguide Slot Antenna Calculator,. 51. Input Value: Calculate Reset Definition of VSWR "Understanding VSWR isn't just about crunching numbers; it's about shaping the future of efficient wireless communication. 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. Return Loss (dB) VSWR:An online calculator for converting between VSWR and Return Loss, Reflection Coefficient, Mismatch Loss, and Reflected Power. The following formula relates the return loss and VSWR. Easy enter the value and click calculate. Where, RL = Return loss in dB. VSWR is a measure of the reflected power on a transmission line. 0. It including shows one percentage from forward to reflected power. return loss Calculator. AJ4CO Observatory Online Calculator. There is also a selection of suitable connectors. Return Loss vs VSWR Calculator: The calculator calculates VSWR from return loss and return loss from VSWR. 01:1 to 3. If system 1 is a cable, then it's between 8 and 14dB. A match is good if the return loss is high. The calculated value is MUCH worse. VSWR Monitoring System The MAX2016 is a dual logarithmic detector/controller used to monitor the VSWR/return loss of an antenna, when it is paired with a circulator and attenuator. LR = Return loss in decibels. 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. 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. 4. 2. Return loss is a measure of how well devices or lines are matched. The calculator on this page helps determine the loss and that can be factored into the design or RF link budget. 10). Enter the Noise Figure and gain for each stage. 2 8. Calculate Reset . . In some systems this is not a trivial amount and points to the need for components with low VSWR. Marki Microwave's Tools is a collection of free online applications for RF analysis and synthesis that are easy to use and mobile-friendly. 4 GHz and 5. Return loss decibel is mostly read by the the antenna analyzer test equipment. The graph below shows input return loss for an amplifier. It is expressed in dB. frequency graph of the above assembly is shown in figure 5. 50:1, the resulting maximum VSWR will be 4. 4 ms—500 forward and 500 reverse samples are collected on each cycle. 707. VSWR, or the Voltage Standing Wave Ratio, is the ratio of the maximum. 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. 155 dB. 0 dB return loss). 1. everything RF has an largest selection of wired calculators for. 99 $ = 1-\Gamma^2$ Convert VSWR to Return Loss, Reflection Coefficient, and Mismatch Loss with our easy conversion calculator. This formula is used to calculate the VSWR from the given return loss. Return Loss is the amount of power that is lost in the signal returned/reflected by a discontinuity in a transmission line. If VSWR is known, then the reflection coefficient (Γ), return loss (RL), and mismatch loss (ML) is calculated by using following formulas. See full list on allaboutcircuits. Forward. This usually means that there is an impedance mismatch at the load. 1) (2. 02 VSWR (i. 5 (-14. These calculators help with unit conversions, VSWR calculations, attenuator design, antenna design, radars, and various other basic calculations that are often required. The path loss that might be measured in a system however will not be this. The calculator converts between return-loss, VSWR, reflection coefficient, and mismatch lost.