Convert VSWR to Return Loss, Reflection Coefficient, and Mismatch Loss with our easy conversion calculator. Return loss is a measure of how well devices or lines are matched. 02:1 VSWR VSWRHighSide of 1. These calculators and. 0 or the results don't mean anything!). Now, let us investigate the physical meaning of return loss. Consider the antenna being used in transmit mode. To do so, calculate the desired return loss and subtract the known load return. Like insertion loss, return loss is also generally described in decibels of power. Let’s start by looking at a 2-port device illustrated in Figure 1. 600mW. 000Match Efficiency (%) Calculates Match Efficiency. By entering the values given above into the VSWR calculator, we see that the probable assembly-chain VSWR of: 1. It is the major factor contributing to the total signal efficiency of the connector. Transmission Line Type : Transmission Line Length : 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. Stripline Impedance Calculator Calculate Stripline impedance for given PCB parameters. VSWR of 1. Return loss is the fiber optic light gets reflected back at the connection point. . 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. Now VSWR is 1. Reflection Coef. Mismatch Loss (dB) 3. Just enter the value and click calculate. Measure the power levels at the input and output of your cable, convert to units of dBm, and calculate the difference. Pasternack's VSWR/Return Loss. Select the FREQ-RETURN LOSS using the Up/Down arrow key and press ENTER. For S 11 it is also possible to display return loss and (voltage) standing wave ratio [(V)SWR] over frequency range. VSWR is defined as the ratio of the maximum voltage to the minimum voltage in standing wave pattern along the length of a transmission line structure. Power to Voltage. Note: The historical definition of return loss results in a negative sign. Pasternack's Friis Transmission Equation Calculator is a path loss calculation measurement tool that calculates the received power from an antenna at some distance given a transmission frequency and antenna gains. dBm To Watt Calculator. There is a mathematical equation to accurately calculate the VSWR of an RF system. Just keep in mind that SWR and Return Loss are both indicators of the quality of the transmission line to antenna feedpoint Z match. We know that the nominal loss of the line is 2 dB. Impedance Mismatch Calculator; VSWR from Forward and Reflected Power; Return Loss to VSWRVSWR Calculator. Return loss can be measured by using microwave and RF test equipment such as a signal generator,. 405 inch. Suppose the wave is not matched with load and signal there is some unwanted signals are interrupted or signal loss is occurred. 2 8. Please Support RF Cafe by purchasing my ridiculously low−priced products, all of which I created. VSWR adalah VSWR juga dapat di artikan sebagai perbandingan antara gelombang maksimum dengan gelombang minimum. But 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. Here's a simple VSWR calculator. VSWR / Return Loss Calculator. Lumped Quadrature Coupler Designer Enter the frequency of operation and system Z0. VSWR specs (specifications) are introduced, along with formulas for mismatch loss and return loss in relationship to VSWR. The losses are due to copper losses/skin loss and for more esoteric antennas (planar types) it's usually dielectric loss. 54-88 MHz -- Low VHF; 88-108 MHz -- FM;S11 then would be the reflected power radio 1 is trying to deliver to antenna 1. VSWR to Return Loss (dB) Calculator. 특히 Return loss와 VSWR의 대략적 값의 관계정도는 암기해두는게 편리할 때가 많다. This calculator converts Return loss (RL) to Voltage Standing Wave Ratio (VSWR). Enter LO Tuning Range, IF frequency/bandwidth and injection side. The return loss is the ratio of the power of the. There is also a selection of suitable connectors. 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. Our fiber optic components insertion loss is less than 0. Next, plug in the calculated return loss value into the formula VSWR = (1 + 10^ (RL/20))/ (1 - 10^ (RL/20)). 15. 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:. e. RG-8 and RG-213 (50 ohm); and RG-11 (75 ohm) are about 0. 0:1,. If you don't have Excel you can. WhatsApp. Enter a value for VSWR (remember: VSWR should be a number larger than 1. A table of convenient values are presented at the bottom. 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. How to Calculate VSWR . Voltage standing wave ratio (VSWR) (pronounced "vizwar" [1] [2]) is the ratio of maximum to minimum voltage on a transmission line . The VSWR monitoring system consists of an ADC for real-time measurements. 9, for system 2 is 0. 3) RLOUT = 20log10|S22| dB (Eq. Given a certain level of heat generation within an assembly, thermal dissipation occurs through three primary mechanisms. Step 2. Consumers; Contact Us;VSWR / Return Loss Calculator. This calculator shows how return loss (VSWR) affects forward power and calculates the power loss difference caused by two different return loss paths. This can be built into a FLEXI-BOX and a transmission line PCB is available which easily adapts for this circuit with a simple trimming operation. 51 dB, and a return loss of 9. 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. Both decimal point and comma are ok. 5:1. Power on the Site Master and press the MODE key. VSWR is defined as the maximum voltage of the standing wave (E max) to the minimum voltage of the standing wave (E min ). For five t-line sections each having a VSWR of 1. This calculator converts between return loss (RL), voltage standing wave ration (VSWR), and reflection coefficient (Γ). Figure 6. These multiple solutions are possible because each contributor is a vector having both. To calculate VSWR for this interface, simply take the ratio of the largest standing wave to the smallest standing wave. Free Space Path Loss Calculator Calculate the loss for a given distance at an RF frequency Enter distance in km and frequency in either MHz or GHz. The graph below shows input return loss for an amplifier. Some of its key features are; displays insertion loss/gain of S1P and S2P files, real-time optimization and tuning. Lower VSWR is always desirable for a system. Pi Attenuator Calculator. VSWR Calculator The VSWR Calculator is a program for reflection unit conversion. It is the ratio between transmitted and reflected waves. 1060. The input to the antenna will be 8,511 watts. Stripline Impedance calculator Smith charts VSWR/Return loss converter Wavelength calculator Wilkinson splitter designer. To help the engineers conducting VSWR sweeps, Lou developed the PIM and. Here's a simple VSWR calculator. 5), which will give us 6. Qorvo Interactive Tools & Calculators. LO Tuning Range (MHz) to :Using an oscilloscope to measure R, X, VSWR and power. This can be built into a FLEXI-BOX and a transmission line (50 Ohm track) PCB is available which easily adapts for this circuit with one simple trimming. number) VSWR or % Reflected Power: MHz: a wavelength in inches or feet: Get Help. A negative loss of 0. VSWR Return Loss Calculator. VSWR is the voltage standing wave ratio it used to measure the all-types waves (example: antenna waves) during transmission. Therefore, a VSWR of less than 1. Return loss is related to both standing wave ratio (SWR) and reflection coef-ficient (Γ). 3. Retrurn loss pada dasarnya memiliki asal yang saling bersinergi dengan VSWR yaitu terjadi disebabkan oleh pencampuran antara. See the quick-reference table below for all compatible SI prefixes. Return Loss and Mismatch Loss Calculator Calculates the absolute load impedance, reflection coefficient, VSWR, return loss and mismatch loss of a load. This VSWR calculator will calculate return loss, mismatch loss, loss in percentage and the reflection coefficient. This VSWR calculator will calculate return loss, mismatch loss, loss in percentage and the reflection coefficient. Matching Pi Attenuator Calculator. The calculator is a spreadsheet that accepts VSWR specifications for all the components in your RF Path—tower mounted amplifiers, diplexers, bias tees, etc. 2. The formula for mismatch loss is simply: mismatch loss= (1-|Γ| 2) alternatively, mismatch loss=1-ρ 2. It is expressed in dB - A high return loss means more power is lost at the load. e. 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. In addition, if GAMMA, VSWR, or dB is known, the calculator can convert between the three. The VSWR (Voltage Standing Wave Ratio) to RL (Return Loss) Calculator is an essential tool that helps RF engineers and technicians understand the performance of RF transmission lines and antennas. From a certain perspective 'Return Loss' is a misnomer. Suppose the wave is not matched with load and signal. Telegram. A high return loss is desirable and results in a lower insertion loss . " – Dr. Formally, S11 is the negative of return loss and has. Coupling to Direct Line Insertion Loss Conversion Table for Directional Couplers. The calculator is a spreadsheet that accepts VSWR specifications for all the components in your RF Path—tower mounted amplifiers, diplexers, bias tees, etc. 2) is considered excellent in most cases. N -1 = previous stage. Directivity and VSWR Measurements. Stage: NF (dB) Gain (dB)The voltage standing wave ratio (VSWR) is defined. 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. VSWR (voltage standing wave ratio, sometimes pronounced "viswar"), is the ratio of the maximum standing wave amplitude at one node to the minimum amplitude at another node in a system. This ratio can also be measured in dB, and expressed as Return Loss. To calculate the Return Loss, add 1 to the VSWR and divide the result. 44 . Formula. 92 dB 0. Mismatch can be specified as: the VSWR at the load end of. Two wire line Two wire line calculator, Twin Lead cable: VSWR calculator v = 1 / √ E r (where E r is the diëlectric constant of the medium), for air E r is +/- 1: VSWR - return loss - reflection coefficient vonversions between VSWR - return loss - reflection coefficientVoltage Standing Wave Ratio (VSWR) is defined as the ratio of the maximum to the minimum voltage on a loss-less line. Channel Emulators/Simulators. Typically, for field applications, the DTF Return Loss mode is used. This can an online calculator that estimates VSWR based on Return Loss. A calculator designed to compute the VSWR, reflection coefficient, return loss and matching loss in a transmission line T-Pad Attenuator Calculator This calculator helps you determine the values of the resistors R1 and R2 to be used for a T-pad attenuator. 2. Return Loss . 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. In either case, the resulting VSWR is 1. 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. 707. Because VSWR and return loss are two ways to measure the same property, you can use the following equations to convert between the two: To understand these theoretical concepts better, let’s consider a. 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 voltage standing wave ratio (VSWR) calculator determines reflection coefficient (GAMMA), VSWR, and return loss (dB) for a mismatched line. 51 dB, and a return loss of 9. ,100 % power transferred from a source to a load via a transmission line/cable). 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. Formulas used: s r r. They are related but measure different aspects of signal performance. Any other value indicates that a portion of the energy is reflected. dBm To Watt Calculator. Pout is the output power or signal level. 72 0. The online calculators are usable in pop-up mode for easy desktop access and functionality. SFDR Visualizer 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. Power to Voltage. Installer for the Windows version of dB Calculator. 5dB loss per 100 feet at 146 MHz). LDF4-50A, HELIAX ® Low Density Foam Coaxial Cable, corrugated copper, 1/2 in, black PE jacket Halogen free jacketing non-fire-retardant (General propose cable for outdoor use only) Find a Partner. VSWR-to-Return Loss CalculatorRF Calculators. It varies from 1 to (plus) infinity and is always positive. Voltage standing wave ratio (VSWR), or often given as just standing wave ratio (SWR), is the ratio between the transmitted and reflected voltage standing waves at a signal chain element incident node. This is because the parasitics of lumped elements tend to kill the frequency response as you go higher in frequency. 4ghz. Calculates the resistor values, attenuation, 'impedance', reflection coefficient, VSWR and return loss of a Pi attenuator. Noise Temperature to Noise Figure Converter. 4569. VSWR table of return loss vs. It displays the impedance of the input and output match in a 50Ω test environment as measured on a network analyzer. Facebook. This test determines the return loss value of each connector pair, cable component and cable to identify the problem location. By Marki Microwave, Posted Wed May 19 2010. Note, that in this conversion to return loss all phase information is lost. Avg. 93 dB. Measure the magnitude of the wave voltages at the coupled and isolated ports. October 20. and Canada (866) 727-8376 International +1 (949) 261-1920Enter the power of your VTX and your antenna's to estimate your range. Enter values for R1 and R2 to calculate attenuator loss and impedance. Reflections are measured using either VSWR or Return Loss. For a VSWR of around 5. This online reflection coefficient to VSWR calculator calculates the VSWR by entering the reflection efficient Γ (= value between 0 & 1). RF Trap With Attenuator Calculator Calculates the attenuation, 'impedance', reflection coefficient, VSWR and return loss of a circuit that incorporates a RF tank circuit into a Pi attenuator. 54dB. Calculate! Where do these calculations come from? Well, start with the formula for VSWR: If we invert this formula, we can calculate the reflection coefficient (, or the return loss. VSWR calculator: Isolation between circuit stages (mentioned above) is a way to minimize the voltage standing wave ratio (VSWR) and, in this way, improve impedance matching. voltage standing wave ratio. The VSWR/return loss calculator from Pasternack will find VSWR, return Loss, mismatch loss, and the reflection coefficient given any one of the listed input types. The VSWR Calculator is used extensively in RF engineering, telecommunications, and antenna design to optimize system performance, reduce signal loss, and prevent damage to RF equipment. Return Loss and Mismatch Loss Calculator. Bernard Sklar, Communications Engineer and author. VSWR is referring to the maximum and minimum voltage values that is being transmitted and reflected by the component. A match is good if the return loss is high. Pressing the ‘Calculate’ button with no inputs will load the example below. The two VSWRs produce a combined return loss, as follows:. For example, an antenna with a VSWR of 2:1 would have a reflection coefficient of 0. —and. This collection of RF and Power Management design tools reflects Qorvo's commitment to the engineering community. Γ = (VSWR – 1)/(VSWR + 1) Return Loss (dB) = -20*Log 10 (|Γ|) Mismatch Loss (dB) = -10*Log 10 (1 – |Γ| 2) Conversion Tables. Pi Attenuator Calculator. Return Loss to VSWR Calculator. The lowest value of the return loss and VSWR are found as -57. The Tee attenuator consists of one series resistor at the input and two parallel, one of which is grounded while the other goes to output. Preferred resistor values are entered into the text boxes, similar to the way that values for a prototype may be selected. 1060. 25mW. Stripline Impedance calculator Smith charts VSWR/Return loss converter Wavelength calculator Wilkinson splitter designer. As an example, consider a Hewlett-Packard ESG-3000 microwave source operating at 900 MHz. For one example, if you have two 2:1 mismatches separated by some distance, the worst case at some frequencies will look like 4:1 VSWR. Both these parameters are used to find a match between a source and load of a system. 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. Click here to use the VSWR Calculator. 6dB. A table of convenient values are presented at the bottom. 009. Matching Pi Attenuator Calculator. 011. 891: 6. Related Posts. Bridged Tee Attenuator Calculator. 50:1, the resulting maximum VSWR will be 4. Effective Radiated Power and Coax Loss Calculator. VSWR is a function of the characteristic impedance of the transmission line and the impedance of the antenna. , some amount of incident power will reflect the source in a practical system). 1. HF 100W Tx on 7MHz, 30m RG-58C/U to a dipole. This calculator is used to calculate the uncertainty of gain for any active RF device (mostly amplifier) that occurs because of the impedance mismatch. Requires Windows 7 (64 Bit) or higher. number) VSWR or % Reflected Power. w (mm) t (um) Er: h1 (mm) h2 (mm) Impedance: Notes: *Comparisons show minimal differences to ADS linecalc and Polar Instruments Quicksolver industry standard tools. Stripline Impedance calculator Smith charts VSWR/Return loss converter Wavelength calculator Wilkinson splitter designer. 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. This ratio represented in dB is called as Return Loss. So a return loss of 20dB indicates a reasonably good match. VSWR Voltage Power Reflected (%) Reflected (%) 1. Cell Site Commissioning and Maintenance. This is an online calculator that calculates VSWR based on Reflection Coefficient. This impedance mismatch can be with a device inserted in the line or with the terminating load. 0 or the results don't mean anything!). Wavelength Calculator. Convert the load VSWR to load return loss per the following equation: RL Improved = 2*Attenuator + RL Load [dB] (where RL=Return Loss) Of course, the method can be reversed to predict the attenuator required to improve a load VSWR by a predetermined amount. The calculation of loss using VSWR is an approximation that is reasonably accurate on long lines with low VSWR and low loss. 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. These are two different ways to measure the same thing. 7. g. 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. from Forward and Reflected Power: Transmitter Forward Power : Watts: System Reflected Power : Watts: VSWR = Reflection Coefficient = Return Loss = dB: Match Efficiency = % Net. 43 20. 1) RL dB = 10 log P i P r. Note that the power handling calculation is based on controlled conditions, including a temperature of 25°C, sea level, and a still air (natural convection) environment. A series of RF calculators for radio frequency engineers. Antenna Downtilt and Coverage Calculator. For a VSWR of 2, the mismatch loss is calculated to be 0. 25mW. Formula. A SWR can be also defined as the ratio of the maximum amplitude to. 9, for system 2 is 0. Return Loss Vs. 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. They will show SWR and Return Loss (RL). The Smith Chart Pegasus Technologies. Stripline Impedance calculator Smith charts VSWR/Return loss converter Wavelength calculator Wilkinson splitter designer. Cable and antenna analyzers allow operators to measure return loss/VSWR, cable loss, distance-to-fault (DTF) measurements, reflection measurement, antenna isolation measurement, impedance, etc. Select operating frequency. VSWR Calculator. Electrical waves reflect when they encounter a change in the impedance of the medium they are traveling in. Measure S11 across the desired frequency range. (GHz) Nut Attach Attach /Pin in (mm) in (mm) lb (g)A VSWR of 1:1 indicates a perfect match, meaning all power is being efficiently transferred, while higher values suggest mismatches and power loss. Title:. 2. 3)" data is theoretical loss for an air spaced copper line of similar dimensions to ladder line and will return loss figures a little better than dry ladder line. This ratio represented in dB is called as Return Loss. Where, RL = Return loss in dB. (1)vswr return loss calculator waveguide calculator circular waveguide calculator rectangular wavelength tem calculator wire loop inductance calculator wire microstrip impedance calculator wire over plane inductance calculator wire self inductance calculator wire stripline impedance calculator. The Antenna Downtilt and Coverage Calculator (aka Antenna Tilt Angle Calculator) is used to determine the approximate downward angle, measured in degrees, which the transmitting antenna is to be positioned for optimal signal strength and coverage. VSWR & Return Loss Calculator Enter forward and reflected power or match to determine equivalent values. 200mW. Step 4. If problems show up during this test, there is a very good. Thus with ~ 25% reflected power: Return Loss = -10 x Log [ 100/25. VSWR is defined as the ratio of the maximum to minimum voltage on a loss-less transmission line (expressed as 3. 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. Use the S11 value in the calculator above to find the equivalent VSWR. In the real world, a VSWR of 1. , thereby assisting engineers to detect system problems and avoid costly, time-consuming system failures. It's located in our download area . Pressing the [Calculate] button with no inputs will load the example below. This mix of web-based tools and downloadable Windows software was developed to help engineers design faster and more accurately. In order to improve the VSWR, this calculator also has an extra input for adding an attenuator to improve or reduce the system VSWR. Reflection. The return loss at the input and output ports can be calculated from the reflection coefficient, S11 or S22, as follows: RLIN = 20log10|S11| dB (Eq. High return loss means low reflected power, so high return loss is good for a system. Return Loss is the portion of a signal that is lost due to a reflection of power at a line discontinuity. 4) The reflection coefficient is calculated from the characteristic impedance of the transmission line and. 1 Return loss in dB = 26. 0:1). The VSWR is about 1. $ = Gamma^2 = 10^{-RL/10}$ Power transmitted ratio for system 1 is 0. 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. (1) ea Flex Assy - 1. VSWR - Return Loss - Γ Conversions These are the standard set of equations for converting between VSWR, return loss, and reflection coefficient (Γ). 2 to 12. To do so, calculate the desired return loss and subtract the known load return. 26 (800) TMS-COAX • LMR-400 TIMES MICROWAVE SYSTEMS Connectors Inner Outer Finish* Part Stock VSWR ** Coupling Contact Contact Body Length Width Weight Interface Description Number Code Freq. Like insertion loss, return loss is also generally described in decibels of power. VSWR to Return Loss Formula VSWR = (1 + 10-RL/20)/ (1 - 10-RL/20) Example Calculation A Return. 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. 98 dB. VSWR to Return Loss Conversion Table. VTX Power in mW. 8. The path loss that might be measured in a system however will not be this. A calculator designed to compute the VSWR, reflection coefficient, return loss and matching loss in a transmission lineVSWR 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. Value dB. Fairview Microwave's Waveguide Calculator provides the cutoff frequency, operating frequency range and closest waveguide size for a rectangular waveguide based on the custom inputted broad wall width. 5. Enter values for R1 and R2 to calculate attenuator loss and impedance. 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. 50 from 6 votes. 9913 and LMR-400 are popular “low-loss” RG-8 types. It varies from 1 to (plus) infinity and is always. The return loss & VSWR is related by the following formula, from which we can calculate return loss for a given VSWR. The return loss and VSWR measurements are key measurements for anyone making cable and antenna measurements in the field. Suitable for higher power (~1800 watts) at HF. This calculator is designed to be an informational and educational tool. If VSWR is known, then the reflection coefficient (Γ), return loss (RL), and mismatch loss (ML) is calculated by using following formulas. 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. G = Gain. Where I2 is the cell containing the VSWR. VTX Power in mW. 8ghz. You can calculate return loss when the VSWR is known. VSWR =. VSWR. An antenna’s Return Loss is a figure that indicates the proportion of radio waves arriving at the antenna input that are rejected as a ratio against those that are accepted. 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. 333, a mismatch loss of 0. 8. From this the reflection factor Γ and the Voltage Standing Wave Ratio (VSWR or SWR) could be determined using the following definitions: – Γ is defined as the ratio of the electrical field strength Eof the reflected wave over the forward travelling wave: Γ = Eof reflected wave Eof forward traveling wave. Reflection -10dB: 1/10 th of the RF energy is being reflected. 000:RF Calculator: Wavelength, dBm, dBuV, W, dBuV/m, mW/cm^2, pJ/cm^2, V & VSWR This RF calculator has been developed by Compliance Engineering as a resource for individuals involved in EMC and RF compliance measurements. Urgent questions should be send via email.