VSWR =. Enter VSWR, Reflection Coefficient, or Return Loss to calculate remaining values. Furthermore, a small VSWR reduces reflections from the antenna. 211 0. Calculates the resistor values, attenuation, 'impedance', reflection coefficient, VSWR and return loss of a Pi attenuator. 205 11. Return loss is when the transmitted signal is not completely. As an added bonus, the results are modifiable and can calculate the other values. 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. The ratio of the input to the reflected signal is. VSWR / Return Loss Calculator VSWR / Return Loss Calculator Introduction Input Type: Input Value: Calculate Reset Definition of VSWR "Understanding VSWR isn't just about. VSWR Mismatch Errors: Both amplitude and phase errors are introduced when mismatched impedances are present at an electrical interface. From the previous chapter, we already know the impedance of the load as measured by the VNA: R=23. Wire over Ground Calculator. Pout is the output power or signal level. Summarizing: Directivity is ratio of power density in a specified direction to the power density averaged over all directions at the same distance from the antenna. 9913 and LMR-400 are popular “low-loss” RG-8 types. 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. VSWR indicates matching condition of source (i. SWR Excel SheetMeasured VSWR = ratio: RL dB: VSWR at antenna = ratio: RL dB: Power into/at antenna = watts: Power reflected from/at antenna = watts: Notes: Maximum Power rating for RG213 cable is 250 watts taking into account environmental de-rating. Return Loss VSWR Reflection. VSWR is the ratio of the peak amplitude of a standing wave to the minimum amplitude of a standing wave, as seen in the following Figure: Figure 1. VSWR table of return loss vs. When ZL ≠ Z0 there must be a reflected wave with appropriate. A ratio of 2:1 indicates that reflections have. This antenna tilt angle calculator also provides,. 3 2300–2700 MHz 1. This calculator converts between return loss (RL), voltage standing wave ration (VSWR), and reflection coefficient (Γ). November 2023. VSWR indicates matching condition of source (i. Dual Dielectric Coax Calculator. These are considered to be standardized impedance values with cables readily available. Vswr To Rl Formula. 2. VSWR is commonly expressed as a ratio. Convert VSWR to Return Loss, Reflection Coefficient, and Mismatch Loss with our easy conversion calculator. The voltage standing wave ratio (VSWR) at a port, represented by the lower case 's', is a similar measure of port match to return loss but is a scalar linear quantity, the ratio of the standing wave maximum voltage to the standing wave minimum voltage. This is described in more detail on a separate page. Just enter the value and click calculate. R = 10log 10 (P incident /P reflected) and. Return loss and VSWR are two important measures of efficient power transmission and both of them can be interconverted to obtain the value. In Figure 14, the ADL5920 is being used to measure the return loss of the load, also at 1 GHz. . 3 800–960 MHz 1. VTX Power in mW. From Rho, calculate VSWR= (1+Rho) / (1- Rho). VSWR Calculator. The field calculator is a very powerful but frequently The following pages contain calculator routines, or “recipes”, for use within the Field Calculator misunderstood and underutilized tool within the 3D “Fields” Post-Processor. In contrast to Return Loss, VSWR displays the match of the system linearly. On the other hand, VSWR and the reflection coefficient are connected by the equation: VSWR = (1+|Γ. 40) a common limit for sweeps with an antenna at the far end. The graph below shows input return loss for an amplifier. Return Loss or a VSWR: return loss (dB) (evaluated as neg. USA CHINA MALAYSIA INDIA ISRAEL UNITED KINGDOM. e. Please Support RF Cafe by purchasing my ridiculously low−priced products, all of which I created. This calculator converts Return loss (RL) to Voltage Standing Wave Ratio (VSWR). VSWR specs (specifications) are introduced, along with formulas for mismatch loss and return loss in relationship to VSWR. 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. In an RF system, when power is sent from the source to load, there are three main parameters to be considered: (1) incident power; (2) reflected power; and (3) power absorbed by the load. A table of convenient values are presented at the bottom. The wave 1 going into the n-port at port 1 is derived from the a voltage wave going into a. 97dB. This general RF calculator provides path loss, VSWR and wavelength as well as conversions between many common measurements used in the wireless industry. VSWR to Return Loss (dB) Calculator. The Reflection Coefficient can be calculated from return loss by using the following formula. Step 4. A calculator designed to compute the VSWR,return loss and matching loss in a transmission line. Return Loss (dB) 3. For support with the MatchCalc tool, contact tool-feedback@qorvo. VSWR is the voltage standing wave ratio it used to measure the all-types waves (example: antenna waves) during transmission. Πώς να χρησιμοποιήσει; Η χρήση του υπολογιστή vswr σε rl περιλαμβάνει τα ακόλουθα βήματα:Descriptions of IL and RL with examples of how the measurements relate to the ratio of Pout to Pin, and Preflected to PinIn fact, striplines often make components such as band-pass filter's more accurately, with more symmetric roll-off and no lower cutoff frequency. is of particular concern in the implementation of Gigabit Ethernet (1000BASE-T) The value of impedances at the ends of the link must be equal to the characteristic impedance of the link. Particularly, reflected power and mismatch loss help describe the. VSWR. Return Loss (dB) VSWR. Example 2. Use the S11 value in the calculator above to find the equivalent VSWR. Values for L and C will be calculated for the four topologies shown. This general RF calculator provides path loss, VSWR and wavelength as well as conversions between many common measurements used in the wireless industry. 0 0. The equivalent VSWR is 1. The relationship between composite return loss and individual return loss in the constructive condition of identical mismatches is that the composite VSWR is the the square of the individual VSWRs. , there is no standing wave). The calculator converts between return-loss, VSWR, reflection coefficient, and mismatch loss. Calculate the VSWR to 1 decimal place. This tutorial defines VSWR and explains how it is calculated. On the other hand, you calculate VSWR by using the maximum and minimum voltage levels of the standing wave pattern on a transmission line. Understanding VSWR and Return Loss. 9913 and LMR-400 are popular “low-loss” RG-8 types. 8 is 80%, or -0. VSWR Calculator. 000:Calculate SWR and return loss from impedance values. Calculates the resistor values, attenuation, minimum attenuation, impedance, reflection coefficient, VSWR and return loss of a resistive matching Pi attenuator. By definition currents going into the n-port are counted positively and currents flowing out of the n-port negatively. Custom. If “V” is used, then the ratio is defined to voltage level of a standing wave at a line. This tool calculates the S11 from the Voltage Standing Wave Ratio (VSWR). (also called insertion loss). 1, directivity does not depend on the distance from the antenna. Just enter the forward and reflected power in watts. VSWR = Voltage standing wave ratio This calculator uses the following formulas for converting the values between the VSWR, return loss, reflection coefficient, and mismatch loss. The term ‘forward power is synonymous with powered deliver to the load, or thru power. R is the symbol for return loss, which as previously discussed is the ratio, in decibels, of incident power P incident to reflected power P reflected, or incident voltage to reflected voltage, described in the following two formulas. The return loss and VSWR measurements are key measurements for anyone making cable and antenna measurements in the field. 1. Given a certain level of heat generation within an assembly, thermal dissipation occurs through three primary mechanisms. Note: If you select a waveguide size from the dropdown below, the broad wall width will be automatically calculated along with the other results. 3 1700–2200 MHz 1. 많은 초심자들이 대체 왜 return loss란 지표와 VSWR이란 지표가 혼용되는지 이해하기 어려워 하는 경향이 있다. It is often expressed in terms of a percentage, or in dB. VSWR to Return Loss . 1 Return Loss. **Note: All of our calculators allow SI prefix input. You calculate return loss by using the reflection coefficient, which measures the ratio of the reflected wave to the incident wave at a given point in the transmission system. 0 indicates about 75% of the power is delivered to the antenna (1. Conclusion: In summary, RL and VSWR formulas and calculators are valuable tools that enhance the efficiency, accuracy and consistency of RF engineering tasks such as measurement, analysis, troubleshooting and system design. This calculator converts values between VSWR, Return loss, Reflection Coefficient and Mis-Match Loss. Because the reflection coefficient Γ < 1, then the return loss will have a positive dB value. Pout is the output power or signal level. The Tee attenuator (T-pad) is a specific type of attenuator circuit which resembles the shape of the letter "T". 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. 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. 259 0. In this case, you may also need to calculate localized heating due to a current standing wave. Power Density Calculator is designed to give the power density, in Watts per square meter, at a given distance, output power and antenna gain. Subscribe to receive Mini-Circuits News. The table shows the effects of combining two components in terms of their maximum VSWR and return loss. Mismatch Loss: Reflected Power Through Power (dB) Coefficient,VSWR is defined as the maximum voltage of the standing wave (E max) to the minimum voltage of the standing wave (E min ). As an example, input power of 100 W (50 dBm) and output of 50 W (47 dBm) yields a cable. VSWR Calculator:(by using RL) return loss(RL)= VSWR = RF Coax Cable Assembly Designer: Most Viewed Companies MegaPhase, LLC. RF engineers often measure return loss on a “dB. 5:1 정도로써 입력매칭이 거의 완전하게. Thus, RL for the system (wrt to the input port) = 17. VSWR ( VSWR meaning Voltage Standing Wave Ratio) is an important concept in radio frequency (RF) engineering. Calculate VSWR, Return Loss, etc. 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. VSWR measures the ratio of voltage peaks and valleys. If our directional coupler had perfect isolation, the return loss of the load would equal the difference between the reflected and forward measurements:. VSWR can be generated by Network Analysers. Suppose the wave is not matched with load and signal there is some unwanted signals are interrupted or signal loss is occurred. If the antenna reflects 250 watts the VSWR at the antenna will be 1. Useful converters and calculators Return loss (RL) is the ratio of the reflected power to the incident power, in decibels (dB). The ratio of a sinusoidal signal reflected back from the load to the incident signal is called return loss. , some amount of incident power will reflect the source in a practical system). The load can be an antenna, filter or other equipment connected to a transmission line. 25 dB of mismatch loss); a VSWR of 7. Enter Input Value Output. 64% or ±10 x log10 (103. 0 0. VSWR. VSWR/Return Loss Calculator will find VSWR, Return Loss, Mismatch Loss, and the Reflection Coefficient given any one of the listed input types. 5 1 1. 045 foot x 12 inches/foot x 1000 mils/inch=540 mils. Convert VSWR to Return Loss and vice versa. The VSWR is an important measure of the quality of a radio antenna system. 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. Therefore, a VSWR of less than 1. 333, a mismatch loss of 0. This mix of web-based tools and downloadable Windows software was developed to help engineers design faster and more accurately. 5, the corresponding value of. 356. 079 29. The VSWR to RL Calculator employs this formula to convert VSWR values into RL values. 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. com . The input to the antenna will be 8,511 watts. The isolation S23 is exactly -20 dB at the center frequency, while the output match is also degraded to about -13. VSWR Mismatch Errors: Both amplitude and phase errors are introduced when mismatched impedances are present at an electrical interface. The ratio of the input to the reflected signal is called the Voltage Standing Wave Ratio (VSWR). VSWR can also be complex (Re+jIm, in theory) but most people just use it with "Real" values and is always >= 1. —and calculates both the typical system return loss along with the worst case return loss. Calculate. transmitter) with the load (i. Using complex impedance is an important technique for handling multi-component AC circuits. There is also a selection of suitable RF. 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. Preferred resistor values are entered into the text boxes, similar to the way that values for a prototype may be selected. The isolation S23 is exactly -20 dB at the center frequency, while the output match is also degraded to about -13. A calculator designed to compute the VSWR, reflection coefficient, return loss and matching loss in a transmission lineThis VSWR calculator will calculate return loss, mismatch loss, loss in percentage and the reflection coefficient. These multiple solutions are possible because each contributor is a vector having both. VSWR Return Loss Calculator Find VSWR. 92 dB 0. —and calculates both the typical system return loss along with the worst case return loss. e. Wavelength Calculator. - Applied attenuation. Where, RL = Return loss in dB. The calculator is a spreadsheet that accepts VSWR specifications for all the components in your RF Path—tower mounted amplifiers, diplexers, bias tees, etc. The calculated value is MUCH worse. Title: dg03-110. 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. voltage standing wave ratio. Figure 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 theThen computing VSWR (voltage standing wave ratio) is easy:. This is an ideal open or short circuit, equivalent to VSWR=infinite. The following formula is used to calculate the Return Loss (RL) from Voltage Standing Wave Ratio (VSWR). LC Impedance matching network designer Enter the input and output impedances to be matched and the centre frequency. Milli Watts to dBm Calculator. It is related to return loss as follows. Equations $$VSWR = \frac{1 + \Gamma}{1 - \Gamma}$$ $$\Gamma = \frac{VSWR-1}{VSWR+1}$$ $$L_{R} = -20log_{10}\Gamma$$ Hence, the return loss is always lower than the ideal system (i. By entering the values given above into the VSWR calculator, we see that the probable assembly-chain VSWR of: 1. [email protected] insertion loss, return loss is also generally described in decibels of power. Same-day shipping if you order in the next hours!. R = 20log 10 (E incident /E reflected)Let’s end our discussion with a table of reflection VSWR, refection coefficient and return loss values (and remember that our VSWR calculator can provide any values you need). Even so, the math gets tedious in a hurry. A calculator designed to compute and calculate the VSWR, return Loss of a circuit and matching loss in a transmission line based on the parameters you enter. Reflection Calculator. VSWR is the ratio of maximum voltage to minimum. 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. Then click the "Calculate" button next to the value you just typed to compute the others. Formally, S11 is the negative of return loss and. 4. 4569. VSWR | Return Loss | Reflection Coefficient Conversion Calculator: This Javascript calculator converts between return loss (RL), voltage standing wave ration (VSWR),. **Note: All of our calculators allow SI prefix input. 1 Return Loss. VSWR is determined from the voltage measured along a transmission line leading to an antenna. 0708,min,max = =A VSWR value of 2 or under is typically acceptable for antennae in communications systems. VSWR is the ratio of voltage applied. To use the calculator, enter the VSWR value for each of the assembly components being added, as exampled below. Software Calculator VSWR dan Return Loss. To convert from VSWR to Return Loss, find the VSWR value in the left column. Because the reflection coefficient Γ < 1, then the return loss will have a positive dB value. Click here to use the VSWR Calculator . VSWR/Return Loss Frequency Band VSWR Return Loss (dB) 680–800 MHz 1. e. Free Online. The main cause of the mismatch is the deviation in the con-Resonant Frequency Calculator. VSWR Return Loss Calculator. Note: The historical definition of return loss results in a negative sign. In the above. October 20, 2022. VSWR table of return loss vs. 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. 091 25. Print - Advertisement - A calculator designed to compute the VSWR, reflection coefficient, return loss and matching loss in a transmission line Inputs. Forward Power (W) Reverse Power (W) VSWR. 600mW. The following variables can be changed in this tool: - Load VSWR. e. Return Loss (dB) VSWR. It is specified in dB. VSWR. VSWR to Return Loss Reference/Conversion Table. 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. Calculate the VSWR to 1 decimal place. A 2-port device has two distinctly interesting. There are two S-parameters of interest. As we have seen, besides of the load impedance, this method measures also the real power delivered to the load. 2 times the minimum voltage along that line, if the line is at least one half wavelength long. 3 dB. p65 Author: barbara Created Date:Return Loss is the portion of a signal that is lost due to a reflection of power at a line discontinuity. Directivity, on the other hand, is the level of the signal which appears at Port 4 and is undesired. There is an equivalent definition for VSWR, which can also be expressed in terms of the Return Loss (RL). 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. Finally, an antenna VSWR monitoring system is shown. 12] = 6 dB. ANSOFT CORPORATION HFSS FIELD CALCULATOR COOKBOOK INTRODUCTION feature of Ansoft’s HFSS Version 7. We want a small return, so a large loss on the return “echo” is good. 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. Note that we have a VSWR calculator that will allow you to convert between VSWR, mismatch loss and return loss!. Load serial resistance and reactance ohm. Return loss is the measure of how small the “return” or reflection/echo is. VSWR is referring to the maximum and minimum voltage values that is being transmitted and reflected by the component. Definition of VSWR. การใช้งาน vswr: หน้าที่หลักของ vswr : เสาอากาศส่งสัญญาณ: อัตราส่วนคลื่นนิ่งของแรงดันไฟฟ้า (vswr) เป็นตัวบ่งชี้จำนวนค่าที่ไม่ตรงกันระหว่างค่า ante nna และ. A VSWR of 6 or more is pretty high and will generally need to be improved. By Marki Microwave, Posted Wed May 19 2010. 3. sales@minicircuits. The table below converts between VSWR, return loss, reflection coefficient, mismatch loss, reflected power and through power. Reflections are measured using either VSWR or Return Loss. 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. 05 VSWR max. 43. It turns out that -13. For example, if you wish to input "25000000", just type "25M" instead. VSWR - Return Loss - Γ Conversions These are the standard set of equations for converting between VSWR, return loss, and reflection coefficient (Γ). But, for a practical system, there will be a small impedance. 3 dB. For example, an antenna with a VSWR of 2:1 would have a reflection coefficient of 0. 표현할 때는 VSWR 값을 어떤 비율값처럼 표현하는데, 예를 들어 아래수식에 의해 VSWR이 3으로 계산되는 경우는 VSWR이 3 : 1 이다 라는 식으로 표현한다. It measures how much energy is reflected back to the transmitter when a signal is transmitted through an antenna. They are related but measure different aspects of signal performance. While return loss analysis can be an ambiguous quality indicator,. VSWR / Return Loss Calculator: IRA Calculator: Wavelength (TEM) Calculator: Link Budget Calculator **Note: All of our radio frequency calculators allow SI prefix input. VSWR is a function of the characteristic impedance of the transmission line and the impedance of the antenna. Where, RL = Return loss in dB. 5, the corresponding value of. VSWR is the voltage standing wave ratio it used to measure the all-types waves (example: antenna waves) during transmission. 009. A table of convenient values are presented at the bottom. 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. offices email call. RF calculations and conversions include metric-standard, link. In Excel this can be done using the max function such as "=max(0. dl. 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. Fill in the input field and select the input type and click the "calculate" button to show the values. Electrical waves reflect when they encounter a change in the impedance of the medium they are traveling in. Note that we have a VSWR calculator that will allow you to convert between VSWR, mismatch loss and return loss!. Upon arriving back at the source, part of the reflected wave is coupled back. VSWR. ERP, Line Loss and Various Calculators, Antenna Voltage and Current and Feedline Voltage and Current. Definition and BackgroundVSWR return loss calculator The voltage standing wave ratio (VSWR), reflection coefficient (Τ), return loss and mismatch loss are all dependant on one or the other, as can be seen by the equations below. As an example of common VSWR values, a VSWR of 3. 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. This formula is used to calculate the VSWR from the given return loss. Antenna). This impedance mismatch can be with a device inserted in the line or with the terminating load. return loss Calculator (by using VSWR) Skin. Despite Equation [Math Processing Error] 10. The Insertion Loss formula is defined as the loss of signal power resulting from the insertion of a device in a transmission line or optical fiber and is usually expressed in decibels (dB) and is represented as I L = 20* log10 (V t / V in) or Insertion Loss = 20* log10 (Voltage / Input Signal Amplitude). net I(RL) V1. Measuring Insertion Loss using RETURN LOSS MODE. Cable impedance ohm. The Insertion Loss formula is defined as the loss of signal power resulting from the insertion of a device in a transmission line or optical fiber and is usually expressed in decibels (dB) and is represented as I L = 20* log10 (V t / V in) or Insertion Loss = 20* log10 (Voltage / Input Signal Amplitude). Note: The historical definition of return loss results in a negative sign. 5 0 0. 64% or ±10 x log10 (103. 6 dB of mismatch loss). The return loss at the input and output ports can be calculated from the reflection coefficient, S 11 or S 22, as follows: RL IN = 20log10|S 11 | dB. 504pF. Low-pass lumped element filters. (also called insertion loss). Interactive Tools & Calculators. Return loss calculation EXAMPLE : VSWR = 1. and is usually expressed as a ratio, such as VSWR = 3:1. Reflection Coefficient to Impedance Converter Convert a reflection coefficient in Magnitude Angle format into Impedance and vice versa. Conclusion: In summary, RL and VSWR formulas and calculators are valuable tools that enhance the efficiency, accuracy and consistency of RF engineering tasks such as measurement, analysis, troubleshooting and system design. Convert VSWR to Return Loss and vice versa. Measure S11 across the desired frequency range. 98 dB is equal to the equaivalent return loss of 1. 5 0. Since the antennas showed low return losses compared to. 30 MB. 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. By entering the values given above into the VSWR calculator, we see that the probable assembly-chain VSWR of: 1. 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. It's assumed that the source impedance is also complex. Use the S11 value in the calculator above to find the equivalent VSWR. Return Loss (RL) = 10 * log(Pr/Pi) Return Loss (RL) in dB = -20* log(Γ) Lesser value of return loss indicates higher impedance matching and vice versa. 1 Return loss in dB = 26. 707. Figure 1. Note: VSWR values were used to calculate the other two related values (rounded to 3 significant places). Definition of VSWR. The VSWR is a measure of the matching of the antenna to the source and feeder cables. The following formula is used to calculate the Return Loss (RL) from Voltage Standing Wave Ratio (VSWR). VSWR & RL Power Home Enter Calculates VSWR Return Loss Match Efficiency Rho Forward Power Reflected Power dB % Input Power Watts Power Attenuation dBm Output Power Output Power (dBm) = Input Power (dBm) - Attenuation (dB) VSWR = Voltage Standing Wave Ratio Power (dBm) = 10 x Log [ Power (Watts) ] + 30 dB Attenuation. Since it is a logarithmic measurement, it is very useful when displaying very small reflections. In one typical RF application, VSWR is. Enter the power of your VTX and your antenna's to estimate your range. 5:1 VSWR is equivalent to -13. e. +1 829 698 0733 What Do You Need? Talk To Us 8am-4pm EST/NY Monday-Friday info@aareff. VSWR - Return Loss - Γ Conversions These are the standard set of equations for converting between VSWR, return loss, and reflection coefficient (Γ). Step 2. Wavelength dBm dBuV W dBuVm mWcm2 pJcm2 V VSWR This RF calculator has been developed by Compliance Engineering as a resource for individuals. 1 Return loss in dB = 26. VSWR (:1) Return Loss (dB) Reflection Coefficient (Γ) Mismatch loss (dB) Reflected Power (%) Through Power (%) VSWR Calculator. 0 is the minimum. R/F Calculators and Conversion Tools VSWR / Return Loss Calculator Find VSWR (Voltage Standing Wave Ratio), Return Loss, Mismatch Loss, and the Reflection Coefficient given any one of the listed input types. Select the FREQ-RETURN LOSS using the Up/Down arrow key and press ENTER. Directivity and VSWR Measurements. 17. Frequency GHz MHz: Distance:Return Loss is basically ratio between Incident power (Pi) on load to Reflected power (Pr) back to source. 01:1 to 3. vary with frequency). 155 dB. A known return loss is applied to the RF OUT port. 009. Calculates the resistor values, attenuation, minimum attenuation, 'impedance', reflection coefficient, VSWR and return loss of a matching Pi attenuator. RL OUT = 20log10|S 22 | dB This calculator computes the VSWR, reflection coefficient, return loss and matching loss in a transmission line. comThere are many antenna parameters out there.