The calculator is designed to be fine tuned after the initial input. 4. With hundreds of coaxial RF cables in-stock and ready to ship worldwide immediately, our coax capacitance calculator lets you calculate the impedance of a coax by allowing you to enter the outer diameter dielectric width and inner conductor diameter. Use Forward and Reflected Power to VSWR Calculator to find the value of the effective VSWR for any RF transmission line, using the forward and reflected power. 5:1 is considered ideal in the RF field, and a VSWR of 2:1 is marginally acceptable for more critical loss systems for low-power applications. 2 8. Free online calculators. Return Loss and Mismatch Loss Calculator. 50:1, the resulting maximum VSWR will be 4. Reactance Calculator. 5 V, Sample Rate Up to 10 GS/s. com Nice Voltage Standing Wave Ratio (VSWR) calculator is given on this page, converting between reflection coefficient, gamma (in both percent and decibels), and mismatch loss. For best accuracy, min VSWR should be. 8 is 80%, or -0. SINAD to ENOB Calculator. The PRS1520 from Peraso is a Beamforming IC that operates in the mmWave range from 24-29. 0:1). In any design requiring transfer of an RF signal and its energy from one functional block or component in a system to a. (VSWR) (Voltage Standing Wave Ratio), a function of the reflection coefficient (Γ), which describes the power reflected from the antenna. However, each field, when changed will allow. Reflected power ratio for system 1 is 0. Download this article of VSWR Explained. 891: 6. In one typical RF application, VSWR is used to measure the amount of reflection due to impedance mismatch. Voltage Measured Along a Transmission Line. Here’s a really simple way of double checking how to much to trim your antenna elements. The VSWR value range from 1. The calculator can also be used to find. 41:1 with a return loss of 15. Modelling practical transmission lines. ,100 % power transferred from a source to a load via a transmission line/cable). Companies like JFW Industries can make a mismatch load (or mismatch termination) that can be used to test amplifiers and help characterize their performance under conditions that might occur in the. The EIRP can take into account the losses in transmission line. Interactive Tools & Calculators. Cavity resonance calculator. 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. 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. It's assumed that the source impedance is also complex. You can use a Bird 43 wattmeter to make forward and reflected power measurements and then calculate the SWR. For a VSWR of 1. Plot input impedance for a range of frequencies. A calculator designed to compute the VSWR, reflection coefficient, return loss and matching loss in a transmission lineA noise temperature and noise factor calculator for both directions o calculation. VSWR Explained. 3. A set of 4 calculators with Chebychev response filters for analog low-pass, high-pass, band-stop and band-pass filters. The PDR05848 from Knowles is a flip-chip resistive divider that operates from DC to 40 GHz. dBm stands for decibel-milliwatts; is a dimensionless unit used to define/measure signal strength (power level), with reference to 1 milliwatt. Figure 1 Given the source and load VSWRs, the VSWR Calc program quickly calculates RF measurement uncertainties. This ratio represented in dB is called as Return Loss. VSWR & Return Loss Calculator: Enter forward and reflected power or match to determine equivalent values. These multiple solutions are possible because each contributor is a vector having both. The calculation of loss using VSWR is an approximation that is reasonably accurate on long lines with low VSWR and low loss. 2 times the minimum voltage along that line, if the line is at least one half wavelength long. The below step by step solved example problem may helpful for users to understand how the input values are being used in such calculations to find the ratio of load impedance matching to the transmission line or wave guide characteristic impedance (Z 0). VSWR - Return Loss - Γ Conversions These are the standard set of equations for converting between VSWR, return loss, and reflection coefficient (Γ). 98dB OR a Mismatch Loss of only. Hits: 6396. It also presents the data in preassigned plots. Therefore, a VSWR of less than 1. 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. Where, RL = Return loss in dB. 5, the corresponding value of. Home. Assuming the systems have no internal loss. Suitable for VHF (~1. Nice Voltage Standing Wave Ratio (VSWR) calculator is given on this page, converting between reflection coefficient, gamma (in both percent and decibels), and mismatch loss. The calculator is designed to be fine tuned after the initial input. This calculator utilises the diameter of the reflector and the operating frequency to calculate critical antenna characteristics such as gain, HPBW, and. W. EIRP is most commonly given in decibels over isotropic, dBi. Use this tool to calculate the load impedance from S11, the input reflection coefficient. 99 $ = 1-Gamma^2$. For VSWR=2, reflection coefficient will be=1/3 and 20log(1/3) =-9. PDR05848. This article will provide a refresher on the concepts behind VSWR and return loss, then explore some special considerations about the VSWR to. Frequency to Wavelength. Suppose the wave is. This online reflection coefficient calculator calculates the reflection coefficient (Γ) by entering the value of the characteristic impedance Z o (in ohms. FieldFox Online Supplemental Help - FieldFox conceptual and reference information. For ease in theoretical calculations, most multipactor power rating curves presented in literature apply to parallel plate conductors. A VSWR calculator; calculates VSWR from forward and reflected power. Reflection Coefficient. It is a measure of how efficiently RF power is transmitted from the power source, through a transmission line, and into the load. 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. 5. It calculates power at the receiver and path loss. 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. The PE2-26-0R58-5R0-23-12-SFF from Quantic PMI (Planar Monolithics) is a RF Amplifier with Frequency 500 MHz to 8 GHz, Gain 26 dB, Gain Flatness ±1. For five t-line sections each having a VSWR of 1. Enter Reflected Power: watts. Noise Factor to Noise Figure Calculator. 707. 93 dB. Voltage Standing Wave Ratio (VSWR), a unitless ratio ranging from 1 to infinity, expresses the amount of reflected energy at the input or output of the device. This ratio represented in dB is called as Return Loss. 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. It supports both balanced and unbalanced lines. The VSWR ranges from 1 or 1:1 (ideal) to infinity. Click to use the Normalized VSWR calculator,. everything RF is the leading source of information for the RF & Microwave Industry. Enter VSWR, Reflection Coefficient, or Return Loss to calculate remaining values. Copper Losses: Loss can occur due to the power dissipation of conducting surfaces. Sometimes he's all wound up about a microwave topic; other times it's random stuff like New Orleans Jazz, SUVs, or Gilligan's Island. The C-V2X module operates in the 5. Click on the desired link below to use each calculator. 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. 1 Return Loss. This tool uses the impedance of the source and load to calculate the Reflection Coefficient (Γ) and Voltage Standing Wave Ratio (VSWR) Formula Source Impedance = Z0 Complex Load Impedance = R + j*X Γ = √ / √ VSWR = (1+Γ)/(1-Γ) Example Calculations For a source impedance of 50 ohm and load impedance of 100 ohm,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. To do so, calculate the desired return loss and subtract the known load return loss. 99. WCN3998. VSWR Calculator The VSWR Calculator is a program for reflection unit conversion. Noise calculators. 651 x 0. S11 then would be the reflected power radio 1 is trying to deliver to antenna 1. Then print all or some of the file. A table of convenient values are presented at the bottom. Slotted line impedance measurements use the reflection phenomenon in a slotted line at microwave frequencies to calculate complex impedance. S11 Linear to dB. Measurement and control of gain and reflected power in wireless transmitters are critical auxiliary functions that are often overlooked. click on any item below to see example plots: The interactive Smith chart enables users to navigate their way around a Smith chart, using simple discrete element impedance matching. The Parabolic Reflector Antenna Calculator on everything RF is an online tool that assists engineers and designers in calculating the critical parameters of a parabolic reflector antenna. See the relationship between VSWR and return loss. Multipactor is an electric field-driven event. ANTENNA CALCULATORS, APPLETS, ANIMATIONS & SIMULATIONS. This is one of those items from the past that Amateur . **Note: All of our calculators allow SI prefix input. Suitable for higher power (~1800 watts) at HF. If you don't have Excel you can use a stand alone app vswr calculator from commscope. VSWR (input) : Return Loss in dB (output): Return loss calculation EXAMPLE : VSWR = 1. 2 x!5NEW Version V2323, released on 31 May 2023, FREE DOWNLOAD, WinRFCalc is the best Windows RF calculator toolbox for EMC, RF and Radio engineers. 4 Chebyshev response analog RF filter design. Measuring VSWR and Gain in Wireless Systems. Misunderstanding VSWR misleads. The digital/analog hybrid design provides excellent phase noise performance and spurious response, which compliments the phase coherent nature of these signal sources. 2%) = ±3. This is the online directional coupler calculator that calculates the coupling (dB), coupling loss(dB), insertion loss (dB), and directivity (dB) of a directional coupler by entering the value of input power P1 (dBm/Watt(s)), output power. It is due to inherent imbalances in directional devices. 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. 0; Ambient = +40°C; Inner Conductor = 100°C (212°F); Sea Level; dr y air; atmospheric pressure; no solar loading Attenuation vs. Save the file to your hard drive. Here's a quick line loss calculator to use Note that the simple program used for this web page gives a very close approximation for additional losses due to SWR. here is an online cascaded VSWR calculator using the RSS method. return loss Calculator. S-parameter Utilities Spreadsheet. VSWR Conversion Table. On-Demand Webinars. But, for a practical system. Line of Sight (LOS) calculator. e. If you provide an email address I can share a system. There are also sections on calculating machines and slide rules as well as sections for buying and selling HP calculators, an HP timeline, collecting information and a software library. Load in ohms. EIRP (mW) EIRP (dBm)Instructions. VSWR is a measure of the efficiency of the transmission of radio frequency power from its source through a transmission line and into a load, such as from a power amplifier, through a transmission line, and to an antenna. 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. Schematic representation of a PCB patch antenna: The calculator is based on simplified formulas for calculating microstrip. Here are the things that you can plot in this version. The VSWR Calculator uses the Root-Sum-of-Squares (RSS) Analysis to calculate the most probable VSWR values in a single waveguide assembly with multiple bends, twists, or a chain of Waveguide Assemblies when added together. A VSWR of less than 1. Convert VSWR to Return Loss and vice versa. Return Loss. The RF phase noise is measured in dBc/Hz and is measured always at frequencies different than the signal of interest. This calculator is used to calculate the uncertainty of gain for any active RF device (mostly amplifier) that occurs because of the impedance mismatch. This ratio can also be measured in dB, and expressed as Return Loss. Formulas used: s r r. Band n71 is a FR1 5G NR Band. 43 20. 43. Retrurn loss pada dasarnya memiliki asal yang saling bersinergi dengan VSWR yaitu terjadi disebabkan oleh pencampuran antara. Hence, usually, the designers prefer a non-reflective type attenuator. This online VSWR Calculator is also very useful. Our RF calculators and converters will provide the figures you need for your radio frequency engineering needs. Low-pass lumped element filters. VSWR Explained. At UHF in general, the vswr of the X50NA (as viewed on 2 different analyzers) seems to waver up and down every few MHz between ~1. Mismatch Loss: Convert VSWR to Return Loss, Reflection Coefficient, and Mismatch Loss with our easy conversion calculator. This website was last updated. Milli Watts to dBm Calculator. Then print all or some of the file. 905 x 1. TEM wavelength is the distance between two adjacent peaks or troughs of adjacent cycles of the TEM wave. SummaryNew software Libraries. In order to improve the. e. WinRFCalc, the best RF calculator toolbox for Windows. Wavelength to Frequency. 009. The modules deliver a Tx power of up to 18 dBm and have Rx sensitivity of -94 dBm. The SPECTRAN V6 VSG from Aaronia is a Real-Time Vector Signal Generator that operates from 75 MHz to 6 GHz. The VSWR Calc program is a Microsoft Visual Basic 32-bit application that runs on Windows 95, 98, and NT 4. It has a real-time bandwidth of 120/240 MHz and can generate standard signal types (CW, sweep, chirp, pulse, etc. The results are conveniently displayed in inches, centimeters, feet and meters. Let's delve deeper into these core concepts, and. Will mismatch at either port A or B of a 2-way power splitter/combiner cause significant performance degradation? A. The following formula relates the return loss and VSWR. This free online interactive Smith chart tool is a calculator which can help you design matching networks and obtain maximum power transfer between your source and load. VSWR and Return Loss RF Calculator VSWR (Voltage Standing Wave Ratio) is a measurement of how well matched a radio transmitter and transmission line is to a load such as an antenna. VSWR from Reflection Coefficient. This general RF calculator includes calculations of path loss, VSWR and wavelength as well as. Voltage standing wave ratio (VSWR) is defined as the ratio between transmitted and reflected voltage standing waves in a radio frequency (RF) electrical transmission system. , the power level of 0dBm represents 1milliwatt). The following table provides conversions for wavelength (from frequency), VSWR (from forward and reflected power) and various other useful conversions. Therefore, total noise figure: NFT = 10 log10 (F) = 10 log10 (2. Start by choosing the number of stages. Click to immediately download to your PC. Circles centered at the origin of the Smith Chart are constant-VSWR circles. dBm definition. The Smith Chart graphically maps S11=reflection coefficient= (ZL-Z0)/ (ZL+Z0) to Load Impedance (ZL), normalized to Z0 (source impedance = center of chart). In electrical engineering, the reflection coefficient is a parameter that defines how much of the electromagnetic wave is reflected due to the impedance discontinuity in a transmission path. 64/100) = ±0. 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 can. The equivalent VSWR is 1. You can plot the VSWR circles. - Applied attenuation. The return loss of a system is defined as the ratio of incident power to reflected power and is measured in dB. This calculator computes the matched line loss for a transmission line using a model calibrated from data for the transmission line supplied to the calculator. The table was created with a handy Windows-based program called VSWR Calculator, detailed by author Steve Hageman of Agilent Technologies (Santa Rosa, CA) in his. Upper VSWR: Calculate. The NC1128A from Noisecom is a White Gaussian Noise Source that operates from 10 MHz to 10 GHz. Suitable for VHF (~1. Calculate VSWR from Forward and Reverse Power. To use the calculator, enter the VSWR value for each of the assembly components being added. However, VSWR gives a quick way of estimated how much power is reflected by an antenna. When the load or antenna impedance, Z (whether real or complex) changes we get different values of VSWR that fall in this range. The voltage standing wave ratio (VSWR) calculator determines reflection coefficient (GAMMA), VSWR, and return loss (dB) for a mismatched line. Related Blog Posts and Calculators. The effect of a short discontinuity in transmission line characteristic impedance. Click to immediately download to your PC. It produces white Gaussian noise with an output power of -17 dBm and has a noise output of -117 dBm/Hz. The RM500Q-GL from Quectel is a Sub-6 GHz Cellular 5G Module that is optimized for global (except USA) IoT and eMBB applications. This tool is javascript so it works on Windows, Mac, IOS, Android. For example, a VSWR of 1. vary with frequency). This frequency to wavelength calculator helps you determine the wavelength of a waveform based on the frequency. This calculator converts between return loss (RL), voltage standing wave ration (VSWR), and reflection coefficient (Γ). Calculator. - Pi Attenuator Calculator. I dared to copycat the title of the above-mentioned blog post. VSWR VSWR transmitter fold back 1. There is also a selection of suitable RF. Because the reflection coefficient Γ < 1, then the return loss will have a positive dB value. 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 into the system. Circles centered at the origin of the Smith Chart are. Return Loss to VSWR Conversion Chart. “468” is the constant used to convert frequency in MHz to feet. Also, the VSWR is a result of things getting reflected back: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. After that, the total noise factor (F) is calculated for 3 stages as follows. 50:1, with a corresponding return loss of 3. 0. The SP4-4080X from Aaronia AG is a Power Divider with Frequency 400 MHz to 8 GHz, Insertion Loss 18 dB, Isolation 6 dB, Input Power 2 W, Amplitude Balance ±0. 9, for system 2 is 0. 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. This can be useful for determining antenna ground plane requirements, antenna spacing requirements to prevent coupling in for multi-antenna systems, or other situations where the antenna’s wavelength is needed. MS2090A. Calculates the resistor values, attenuation, minimum attenuation, 'impedance', reflection coefficient, VSWR and return loss of a matching Pi attenuator. The low-pass filter often is a natural choice for lumped element. Aug 6, 2019. Ideal for smartphones and computing devices, this mobile connectivity chipset supports WPA3 encryption, the latest and most secure protocol announced by. Lower VSWR means lower reflection power (good impedance matching); thus, power transfers to load will be high. . But the meter at the transmitter will show a VSWR of 1. High VSWR values indicate less efficient power transmission and can lead to significant. For transmission lines to have the highest quality, it is necessary to have impedance matching. e. Preflected watts. VSWR should be significantly larger than Min VSWR. DC Blocks are components that prevent the flow of DC signals into systems while allowing higher frequency RF signals to pass through. 94 -> 100W output = 80W radiated VSWR ReturnLoss(db). $ = \Gamma^2 = 10^{-RL/10}$ Power transmitted ratio for system 1 is 0. Unless you have a piece of slotted line-test equipment this is a hard definition to use, especially since the concept of voltage. ) The Museum of HP Calculators displays and describes older Hewlett-Packard calculators. 5:1 is ideal, a VSWR of 2:1 is considered to be marginally acceptable in low power applications where power loss is more critical, although a VSWR as high as 6:1 may still be usable with the right equipment. For example, 5 mW is equal to 7 dBm, and 100 KW is equal to 80 dBm. EIRP (Effective Isotropic Radiated Power) is the measured radiated power of an antenna in a specific direction. To help the engineers conducting VSWR sweeps, Lou developed the PIM and VSWR System Calculators, one of our most valuable assets helping many customers during the design phases and site build-outs. VSWR Calculation. The Unknown Editor has been spouting off about a variety of topics since he started this site back in 2001. Calculate Voltage and Current at your Antenna's Feed Point! Power (in watts): Impedance (in ohms):VSWR Calculator: วิธีคำนวณ VSWR? อิมพีแดนซ์ไม่ตรงกันส่งผลให้เกิดคลื่นนิ่งตามสายส่ง และ SWR ถูกกำหนดให้เป็นอัตราส่วนของแอมพลิจูดของคลื่น. 30 MB. Calculate VSWR, Return Loss, Reflection Coefficient, Match Efficiency, and Net Transmission Loss from an RF broadcast transmitters forward and reflected power readings. ZoCoaxial Cable Impedance Calculator. Just in case you don’t care for mathematical equations, here’s a little “cheat sheet” table to help. 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 signal reflected back in a transmission line. Measure S11 across the desired frequency range. 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. The equivalent VSWR is 1. S. It is a Smith Chart based linear circuit simulation program that can be used via a website. VSWR and its Effects on Power Amplifiers. Click here to see the VSWR to Return Loss Chart. The ratio of the input to the reflected signal is called the Voltage Standing Wave Ratio (VSWR). 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. 2:1,. From reaching the most routine arithmetic, percent, or decimal values to metric conversions and statistical. Marki Microwave's Tools is a collection of free online applications for RF analysis and synthesis that are easy to use and mobile-friendly. Return loss can be measured by using microwave and RF test. Please Support RF Cafe by purchasing my ridiculously low−priced products, all of which I created. These multiple solutions are possible because each contributor is a vector having both. Return Loss (dB) Mismatch Loss (dB). See Figure A. Coupling to Direct Line Insertion Loss Conversion Table for Directional Couplers. You can plot the VSWR circles. VSWR Calculator. Resonant Frequency Calculator. Pout is the output power or signal level. In other words, The Half Power Beamwidth (HPBW) is the angular separation in which the magnitude of the. 24 dB. Skin depth calculator Stripline Impedance calculator Smith charts VSWR/Return loss converter Wavelength calculator Wilkinson splitter designer. The VSWR is a function of the magnitude of the reflection coefficient, so no phase information is obtained about the impedance. VSWR. As an added bonus, the results are modifiable and can calculate the other values. Enter Forward Power: watts. A value of 1. 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. Pincident watts. This VSWR calculator will calculate return loss, mismatch loss, loss in percentage and the reflection coefficient. S 11 =S 22 =S 33 =S 44. Each SP8T switch is used to send the input/output signals to 2 pins. A series of RF calculators for radio frequency engineers. RM500Q-GL. Half Power Beam Width or HPBW is an angular width (in degrees), measured on the major lobe of an antenna radiation pattern at half-power points i. The chart is used during RF simulation by RF engineers and is displayed by vector network. +-Wire 2 Wire 1 +-0 F = V g Z g Z L I ( d) V ( d) l Transmission line Load Z o Generator d d x | V ( d) | d n Convert VSWR, return loss, reflection coefficient and mismatch loss with this online calculator. in the tool box or ham shack. VSWR / Return Loss Calculator. Offset Quadrature Phase Shift Keying (OQPSK) is a variant of the QPSK modulation scheme where the phase or timing of either the in-phase or Quadrature component is shifted relative to each other by a one bit-period or half a symbol-period Ts as compared to QPSK. This mismatch can influence the performance of the source. 4 GHz Wi-Fi 4 (802. However, each field, when changed will allow. It also presents the data in preassigned plots. A minimum value of VSWR is desired for maximum power transfer between the source and the load. The VSWR/return loss calculator from Pasternack will find VSWR, return Loss, mismatch loss, and the reflection coefficient given any one of. , the signal reflected back in a transmission line. This can be built into a FLEXI-BOX and a transmission line PCB is. RF Trap With Attenuators Computes attenuation, return loss, reflection coefficient and VSWR . Graphics downloads. The following formula is used to calculate the Return Loss (RL) from Voltage Standing Wave Ratio (VSWR). This VSWR calculator allows you to calculate the reflection coefficient, reflected power, and mismatch loss for a given value of VSWR (voltage standing wave ratio). Bottom line is that in most cases, if the return loss of a coupler is specified at 15 dB, all of the ports are expected to meet that requirement, over the. (i. VSWR is defined as the ratio of the maximum to minimum voltage on a loss-less transmission line (expressed as 3. 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. But it does have a few entry boxes and drop-down menus that can take some time to familiarize yourself with. This does NOT take into consideration the type or size of horizontal reflectors, of even if there is a need for them. - Balanced Attenuator Calculator. Pout is the output power or signal level. VSWR is determined from the voltage measured along a transmission line leading to an antenna. 34:1 or a return loss of 16. Rectangular Waveguide Sizes. So, let’s take a step-by-step look at how to get your cascade analysis rolling. Upon arriving back at the source, part of the reflected wave is coupled back. Enter the source characteristic impedance and the load impedance then press "Calculate" below. Voltage standing wave ratio (VSWR) is the measure of impedance mismatching between two connected lines. 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. 5 GHz Ku Band, Frequency TX 10. Use the S11 value in the calculator above to find the equivalent VSWR. In industry, VSWR is sometimes pronounced "viz-wer". This signal generator offers a maximum.