To calculate VSWR for this interface, simply take the ratio of the largest standing wave to the smallest standing wave. Increasing return loss corresponds to lower SWR. dBm to Watt: Tool to convert the dBm to Watt unit 3. The load can be an antenna, filter or other equipment connected to a transmission line. There are two S-parameters of interest. 3% of the power back towards the transmitter. This is an online calculator that calculates VSWR based on Reflection Coefficient. Return Loss is a measure of the amount of energy that is reflected back at a discontinuity in a Radio Frequency Circuit . Enter the Noise Figure and gain for each stage. VSWR to Return Loss. $ = \Gamma^2 = 10^{-RL/10}$ Power transmitted ratio for system 1 is 0. 979Return Loss (dB) Calculates Return Loss -13. 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. 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. 5. reflection coefficient definition. Many antenna specification sheets list the VSWR and some list the return loss, but many do not. If VSWR is known, then the reflection coefficient (Γ), return loss (RL),. VSWR is a measure of the reflected power on a transmission line. Note that we have a VSWR calculator that will allow you to convert between VSWR, mismatch loss and return loss!. As an added bonus, the results are modifiable and can calculate the other values. Return Loss and Mismatch Loss Calculator Calculates the absolute load impedance, reflection coefficient, VSWR, return loss and mismatch loss of a load. Return Loss (dB) = 10 x Log ( Pr / Pf ) Match Efficiency (%) = 100% x (1 - Pr / Pf)Determine how to calculate the effect of VSWR on Return Loss. The return loss conversion table is a valuable tool for antenna engineers, allowing them to quickly and accurately convert the VSWR values they measure into return loss values. Suitable for higher power (~1800 watts) at HF. 0. Reflection Calculator: RL = dB: VSWR = Γ = VSWR = RL = dB: Γ = Zo . 3. At 100 MHz, the loss is 0. Useful converters and calculatorsAn online calculator for converting between VSWR and Return Loss, Reflection Coefficient, Mismatch Loss, and Reflected Power. 15. Measure the power levels at the input and output of your cable, convert to units of dBm, and calculate the difference. Custom. VSWR specs (specifications) are introduced, along with formulas for mismatch loss and return loss in relationship to VSWR. As an example, input power of 100 W (50 dBm) and output of 50 W (47 dBm) yields a cable. VSWR is the voltage standing wave ratio it used to measure the all-types waves (example: antenna waves) during transmission. Calculations Pathloss / RSSI; Missmatch Loss; IP3 / SFDR Calculator; IP3, IP2, 1dB Comp. These multiple solutions are possible because each contributor is a vector having both. It may be used to calculate and plot the return loss, standing wave ratio from Smith charts, Real power Vs Frequency, VSWR, E-field and H-field distribution, gain as well as radiation patterns. coefficient of Port 1 (also called return loss), and. 5dB loss per 100 feet at 146 MHz). The VSWR Calc program is a Microsoft Visual Basic 32-bit application that runs on Windows 95, 98, and NT 4. 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. 794VSWR Calculation. Enter a value for VSWR (remember: VSWR should be a number larger than 1. Power on the Site Master and press the MODE key. The online calculators are usable in pop-up mode for easy desktop. 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. 57. 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. This calculator shows how return loss (VSWR) affects forward power and calculates the power loss difference caused by two different return loss paths. Thus, the 55-ohm termination contributed 26 dB loss to the inherent 6 dB loss of a two-way splitter. A VSWR of 1:1 means that there is no power being reflected back to the source. It is specified in dB. SFDR Visualizer You calculate return loss using the reflection coefficient, which measures the ratio of the reflected wave to the incident wave at a given point in the transmission system. 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. Use the S11 value in the calculator above to find the equivalent VSWR. 34:1 or a return loss of 16. VSWR. 020:1 ≤ VSWRLowSide of 1. 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. These are the standard set of equations for converting between VSWR, return loss, and reflection coefficient (Γ). October 20, 2022. 54dB. Here's a simple VSWR calculator. Enter Your Values. 換算表. 44 . The result is an antenna VSWR or return loss measurement corrected for cable loss. However, convention and some literature quote return loss as a negative value akin to an S (1,1) measurement on a Network. By Marki Microwave, Posted Wed May 19 2010. Email. VSWR - Return Loss - Γ Conversions These are the standard set of equations for converting between VSWR, return loss, and reflection coefficient (Γ). 50:1, with a corresponding return loss of 3. 1) RL dB = 10 log P i P r. 5:1. VSWR merupakan parameter yang juga sebagai penentu matching antara antena dan transmitter. 0 or the results don't mean anything!). A very interesting one, at least for educational purposes, is the measurement of complex loads: R, X, VSWR, Return Loss, Phase, capacitance, inductance and real power. 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. Title:. Γ = (VSWR – 1)/(VSWR + 1) Return Loss (dB) = -20*Log 10 (|Γ|) Mismatch Loss (dB) = -10*Log 10 (1 – |Γ| 2) Conversion Tables. 02 dB. com . The reflection coefficient is calculated from the VSWR and used to compute the mismatch loss in dB as shown below. Return Loss to VSWR. VSWR Calculator: This is the ratio of maximum voltage to minimum voltage in standing wave pattern. N = current stage. The losses are due to copper losses/skin loss and for more esoteric antennas (planar types) it's usually dielectric loss. ERP, Line Loss and Various Calculators, Antenna Voltage and Current and Feedline Voltage and Current. number) VSWR or % Reflected Power. Here's a simple VSWR calculator. 39 0. The calculator is a spreadsheet that accepts VSWR specifications for all the components in your RF Path—tower mounted amplifiers, diplexers, bias tees, etc. Suppose the wave is not matched with load and signal there is some unwanted signals are interrupted or signal loss is occurred. Please Support RF Cafe by purchasing my ridiculously low−priced products, all of which I created. VSWR (Voltage Standing-Wave Ratio) VSWR is the ratio of the maximum to minimun. WhatsApp. Upon arriving back at the source, part of the reflected wave. Stripline Impedance calculator Smith charts VSWR/Return loss converter Wavelength calculator Wilkinson splitter designer. Email. In one typical RF application, VSWR is. These are the standard set of equations for converting between VSWR, return loss, and reflection coefficient (Γ). 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. 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). These calculators and. VSWR is a function of the characteristic impedance of the transmission line and the impedance of the antenna. Return loss is always expressed in dB, which is a logarithmic scale. Reflection Coef. Electrical waves reflect when they encounter a change in the impedance of the medium they are traveling in. 6dB. Consider the antenna being used in transmit mode. Enter VSWR, Reflection Coefficient, or Return Loss to calculate remaining values. i Created Date: 11/26/2012 4:49:33 PMMeasuring Insertion Loss using RETURN LOSS MODE. Frequency GHz MHz: ImpedanceOn-Demand Webinars. Frequency GHz MHz: ImpedanceRF Transmission Line Loss Calculator;. Mismatch Loss: Convert VSWR to Return Loss, Reflection Coefficient, and Mismatch Loss with our easy conversion calculator. How to fill out return loss to VSWR: First, calculate the return loss (RL) value using the formula RL = -20*log (VSWR+1). (under "Support" and "Technical Application Notes" tabs). 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. T Attenuator Calculator. Click here to use the VSWR. We know that the nominal loss of the line is 2 dB. See the quick-reference table below for all compatible SI prefixes. 5:1 VSWR is equivalent to -13. 1. 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. 0 Return Loss / VSWR. Power handling may be limited by the connector choice. Stripline Impedance calculator Smith charts VSWR/Return loss converter Wavelength calculator Wilkinson splitter designer. The MAX2016 outputs the difference between the two power detectors. 8ghz. 5. Bridged Tee Attenuator Calculator. 4ghz. In either case, the resulting VSWR is 1. VSWR can also be complex (Re+jIm, in theory) but most people just use it with "Real" values and is always >= 1. 1060. For example, an antenna with a VSWR of 2:1 would have a reflection coefficient of 0. PI Attenuator Calculator. MHz. VSWR to Return Loss Formula VSWR = (1 + 10-RL/20)/ (1 - 10-RL/20) Example Calculation A Return. Nice Voltage Standing Wave Ratio (VSWR) calculator is given on this page, converting between reflection coefficient, gamma (in both percent and decibels), and mismatch. Note that it blows up at the lower cutoff frequency of 6. This calculator allows calculation of VSWR from Zload (or Yload or S11) and Zo. Reflection -10dB: 1/10 th of the RF energy is being reflected. Return Loss to VSWR Conversion Chart. The table below converts between VSWR, return loss, reflection coefficient, mismatch loss, reflected power and through power. —and calculates both the typical system return loss along with the worst case return loss. From the table we can understand that when the return loss is <10dB, the antenna will be at VSWR >2, indicating the system will reflect >30% power and the performance of the antenna will be <70%. Matching Pi Attenuator Calculator. G = Gain. Enter VSWR, Reflection Coefficient, or Return Loss to calculate remaining values. In some systems this is not a trivial amount and points to the need for components with low VSWR. 19. As an example, consider a Hewlett-Packard ESG-3000 microwave source operating at 900 MHz. 868. 98 dB. 54 dB (11% of your transmitter power is reflected back). In this Inside Wireless episode we will look at Voltage Standing Wave Ratio (VSWR), |S11|, and Return Loss. 32 dB and 1. 2 means a peak voltage 1. It is expressed in dB - A high return loss means more power is lost at the load. VSWR-to-Return Loss CalculatorRF Calculators. Friis Transmission Calculator. 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 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. 25mW. Reflected power ratio for system 1 is 0. 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. Measure S11 across the desired frequency range. 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. 93 dB. The input to the antenna will be 8,511 watts. 333, a mismatch loss of 0. If the antenna reflects 250 watts the VSWR at the antenna will be 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. 2) is considered excellent in most cases. 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. 54 dB (11% of your transmitter power is reflected back). The oscilloscope is a very powerful tool that has many functions. —and. Both terms are used to characterize the uniformity of a cable’s impedance along its length as it relates to reflected energy. For a VSWR of 2, the mismatch loss is calculated to be 0. Reflection. g. It tells the severity of standing waves in a transmission line. 39 0. 7145 VSWR 6 Directivit y of directiona l coupler 23 dB 0. 4. 891: 6. 2:1 VSWR. 1) (7. Step 2. These measurements show the user the match of the system and if it conforms to system engineering specifications. Like insertion loss, return loss is also generally described in decibels of power. Conversion Tables. The calculator can be particularly useful when designing a system or testing worst-case impedance scenarios. Return Loss = incident power/ reflected power. Stripline Impedance calculator Smith charts VSWR/Return loss converter Wavelength calculator Wilkinson splitter designer. 2. Convert VSWR to Return Loss, Reflection Coefficient, and Mismatch Loss with our easy conversion calculator. 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. Z L = Ω. Measure the magnitude of the wave voltages at the coupled and isolated ports. Return Loss (dB) 3. 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. 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. 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. 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. The table shows the effects of combining two components in terms of their maximum VSWR and return loss. voltage standing wave ratio 020710. Stripline Impedance calculator Smith charts VSWR/Return loss converter Wavelength calculator Wilkinson splitter designer. This mix of web-based tools and downloadable Windows software was developed to help engineers design faster and more accurately. The concept of loss factor is discussed on this page. If you only need to convert between GAMMA, VSWR, and dB, you can ignore Zo and ZL. 54dB. Both decimal point and comma are ok. The formula and equations used by this calculator are also provided. Return Loss vs VSWR Calculator: The calculator calculates VSWR from return loss and return loss from VSWR. Power to Voltage. 5:1 is considered ideal in the RF field, and. Typically, for field applications, the DTF Return Loss mode is used. 333, a mismatch loss of 0. VSWR is the voltage standing wave ratio it used to measure the all-types waves (example: antenna waves) during transmission. 98 dB is equal to the equaivalent return loss of 1. Mismatch Loss (dB). Use the S11 value in the calculator above to find the equivalent VSWR. Hence, the return loss is always lower than the ideal system (i. Unless you have a piece of slotted line-test equipment this is a hard definition to use, especially since the concept of voltage. Here Click here to learn more about VSWR. Calculate. Free online calculators. 92 dB 0. 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. Formally, S11 is the negative of return loss and. 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. 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. 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. Set the start and stop frequencies F1 and F2. 2. High return loss means low reflected power, so high return loss is good for a system. Converts dB into VSWR. from Forward and Reflected Power: Transmitter Forward Power : Watts: System Reflected Power : Watts: VSWR = Reflection Coefficient = Return Loss = dB: Match Efficiency = % Net. Like insertion loss, return loss is also generally described in decibels of power. Urgent questions should be send via email. sales@minicircuits. Use these voltage values and D in the following equation to get the reflection coefficient: Solve this equation for Γ to get the reflection coefficient and VSWR. VSWR calculator. If “V” is used, then the ratio is defined to voltage level of a standing wave at a line. A common example is a power amplifier. This is an online calculator that calculates Return Loss based on Reflection Coefficient. 5:1 is considered ideal in the. 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. The first-factor ohmic loss is an unavoidable loss as it is a property of. VSWR Calculator. *Strictly, a loss quantity when expressed in dB should be positive. Noise Conversion Calculator. Due to reflections, an additional loss of 0. 009. Figure 1. The Return Loss on the other hand deals usually with the voltages and is used in the VSWR measurements, either manually or through the instrumentation. If there is something in the microwave universe that you need a different calculator for, drop us a note and we'll see what we. As the VSWR increases, the quality of the match deteriorates and more power is reflected back. VSWR & Return Loss Calculator Enter forward and reflected power or match to determine equivalent values. It's located in our download area . The MAX2016 is a dual logarithmic detector/controller used to monitor the VSWR/return loss of an. Value dB. The following formula relates the return loss and VSWR. Voltage standing wave ratio (VSWR)A calculator designed to compute the VSWR,return loss and matching loss in a transmission line. Watts the reflected power would be 1 Watt. A high return loss is desirable and results in a lower insertion loss. 89% of the power is transmitted forward, while 11% is reflected back into the source. Stripline Impedance Calculator Calculate Stripline impedance for given PCB parameters. WhatsApp. Return Loss (dB) to VSWR Calculator. This impedance mismatch can be with a device inserted in the line or with the terminating load. The table below converts between VSWR, return loss, reflection coefficient, mismatch loss, reflected power and through power. Loss factor. 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. The calculation of loss using VSWR is an approximation that is reasonably accurate on long lines with low VSWR and low loss. It is expressed in dB. Convert VSWR to Return Loss and vice versa. We can then find the return loss as -20 * log(0. 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. Return Loss is a logarithmic scale, and Voltage Standing Wave Ratio (VSWR) is a linear scale. Wavelength. Pi Attenuator Calculator. LO Tuning Range (MHz) to :Using an oscilloscope to measure R, X, VSWR and power. 특히 Return loss와 VSWR의 대략적 값의 관계정도는 암기해두는게 편리할 때가 많다. Return loss (RL) is the ratio of the reflected power to the incident power, in decibels (dB). This is an ideal open or short circuit, equivalent to VSWR=infinite. 51 dB, and a return loss of 9. Convert S11 to return loss; Compute Voltage Standing Wave Ratio (VSWR) from Return Loss; References [1] Return Loss on Wikipedia The return loss of a system is defined as the ratio of incident power to reflected power and is measured in dB. **Note: Like our stripline impedance calculator, all of our RF calculators allow SI prefix input. 4 GHz. g. 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. Because the reflection coefficient Γ < 1, then the return loss will have a positive dB value. VSWR is a measure of the reflected power on a transmission line. so you need to calculate both. dBm To Watt Calculator. 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. Please enter your values below. VSWR Calculator. 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. Noise Factor to Noise Figure Calculator. 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. Values for L1, L2 and C will be calculated. This VSWR calculator will calculate return loss, mismatch loss, loss in percentage and the reflection coefficient. VSWR Return Loss (dBm) VSWR Return Loss (dBm) VSWR Return Loss (dBm) VSWR. RETURN RETURN RETURN RETURN RETURN LOSS VSWR LOSS VSWR LOSS VSWR LOSS VSWR LOSS VSWR (dB) (dB) (dB) (dB) (dB) return loss Vs. Port 4 is the port which provides the reflected measurement (Return Loss/ VSWR), when the device is configured with the DUT connected to Port 2. 3) RLOUT = 20log10|S22| dB (Eq. 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. Therefore, a VSWR of less than 1. 0:1). S. RL = 20 * log10 ( (VSWR + 1) / (VSWR - 1)) RL = 20 ∗ log10( (V S W R + 1)/(V S W R − 1)) Variables: RL is the Return Loss (dB) VSWR is the Voltage Standing Wave Ratio. Cascaded Noise Figure Calculator Calculate the input referred noise figure for cascaded stages. 4) The reflection coefficient is calculated from the characteristic impedance of the transmission line and. The table below converts between VSWR, return loss, reflection coefficient, mismatch loss, reflected power and through power. 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. A return loss conversion table is used to quickly convert VSWR values into return loss values. This ratio represented in dB is called as Return Loss. 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. B at a level of -32 dBm. 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’. VSWR Mismatch Errors: Both amplitude and phase errors are introduced when mismatched impedances are present at an electrical interface. These calculators help with unit conversions, VSWR calculations, attenuator design, antenna design, radars, and various other basic calculations that are often required. Add to My Products Lists. 5:1 VSWR is equivalent to -13. Assuming the systems have no internal loss. VSWR is defined as the ratio of the maximum to minimum voltage on a loss-less transmission line (expressed as 3. A 2-port device has two distinctly interesting. For example, if you wish to input "25000000", just type "25M" instead. Return Loss is the amount of power that is lost in the signal returned/reflected by a discontinuity in a transmission line. Stripline Calculator. Where, RL = Return loss in dB. The loss goes to infinity at the lower cutoff frequency. The following equation is especially useful when using a directional power meter. You can calculate return loss when the VSWR is known. Where, RL = Return loss in dB. N -1 = previous stage. VSWR היא מדידה של רמת הגל העומד על קו הזנה, זה ידוע גם כיחס גל עומד (SWR). 41:1 with a return loss of 15. Facebook. 794 Both these parameters are used to find a match between a source and load of a system. Introduction Input Type: Input Value: Calculate Reset Definition of VSWR "Understanding VSWR isn't just about crunching numbers; it's about shaping the future of efficient. 00Watts = 1. The Reflection Coefficient can be calculated from return loss by using the following formula. In the real world, a VSWR of 1. 17. If you don't have Excel you can. October 20. 01. How To Calculate Retention Factors In Thin Layer Chromatography Chemistry Study Com. Return loss vs. In fact, striplines often make components such as band-pass filter's more accurately, with more symmetric roll-off and no lower cutoff frequency. Load serial resistance and reactance ohm. With this equation, you can plug in the value of D and the measured voltages, and finally solve the above. Calculate SWR and return loss from impedance values. Moreover, return loss is the relationship between both the reflection coefficient (Γ) and the. Elite RF. Note: If you select a waveguide size from the dropdown below, the broad wall width will be automatically calculated along with the other results. Cell Site Commissioning and Maintenance. Return loss vs. Antenna efficiency is the percentage of radiated power compared to non-relected power. Calculates the resistor values, attenuation, 'impedance', reflection coefficient, VSWR and return loss of a Pi attenuator. 002 respectively as shown in table-6 for the notch width, g=1. This collection of RF and Power Management design tools reflects Qorvo's commitment to the engineering community. Impedance Mismatch Calculator; VSWR from Forward and Reflected Power; Return Loss to VSWRVSWR Calculator. This calculator converts between return loss (RL), voltage standing wave ration (VSWR), and reflection coefficient (Γ). PI Attenuator Calculator.