4 GHz Wi-Fi 4 (802. 1-800-761-3041 Contact Account Cart Search Waveform. When the load or antenna impedance, Z (whether real or complex) changes we get different values of VSWR that fall in this range. 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. These calculators help with unit conversions, VSWR calculations, attenuator design, antenna design, radars, and various other basic calculations that are often required. 0. The resulting ratio is normally expressed as a ratio, e. Here, Zo is the characteristic impedance of pi type symmetrical attenuator, which is equal to the value of source (Zs) and load impedance (ZL). For example, a VSWR of 1. dBm To Watt Calculator. Start by choosing the number of stages. See full list on allaboutcircuits. WNC C-V2X. HSM12001B. The PDR05848 from Knowles is a flip-chip resistive divider that operates from DC to 40 GHz. Schematic representation of a PCB patch antenna: The calculator is based on simplified formulas for calculating microstrip. Editorial Team - everything RF. 0 indicates about 75% of the power is delivered to the antenna (1. Free Online Engineering Calculator to quickly convert a Return Loss (dB) into a VSWR. dBm or decibel-milliwatt is an electrical power unit in decibels (dB), referenced to 1 milliwatt (mW). Created: 16 October 2022. The Sterling-LWB+ Series from Laird Connectivity are 2. Note that the outer boundary of the Smith Chart (where =1) corresponds to a VSWR of infinity. Once the VSWR is known, return loss can be calculated as follows: Return Loss = 20 ∙ log10 () Generally, a higher return loss value is preferable. September 27, 2016 By Dan KB6NU 6 Comments. Retrurn loss pada dasarnya memiliki asal yang saling bersinergi dengan VSWR yaitu terjadi disebabkan oleh pencampuran antara. Click here to go go to our main page on VSWR We offer an Excel spreadsheet that will help you visualize how voltage standing waves are created. The webmaster does not read these comments regularely. VSWR =. After that, the total noise factor (F) is calculated for 3 stages as follows. , convert to noise factor F1, F2, &F3). VSWR to Return Loss. In addition, if GAMMA, VSWR, or dB is known, the calculator can convert between the three. e. e. Generic noise bridge calculator. 3 dB, a split loss of 3 dB, and a VSWR of 1. RX1, RX2 Noise bridge calculator. 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. As such, you must consider conductor geometry, the presence of external fields, and VSWR before you can determine power handling. Sterling-LWB5+. Suitable for higher power (~1800 watts) at HF. It provides security and. If we measure the power of a reflected signal from an antenna near a radio transmitter, the measurement of the reflected signal’s amplitude at this juncture compared to the initially transmitted. RG-8 and RG-213 (50 ohm); and RG-11 (75 ohm) are about 0. The results of this calculator may be rounded, the user takes responsibility for use of results. This online inductance, reactance, and admittance calculator helps to calculate the value of reactance XL (Ω) and inductive susceptance BL (m-mhos) of an inductor by entering the value of the inductance L (nH) and frequency of operation (GHz). It also presents the data in preassigned plots. 2. In an ideal system, 100% of the energy is transmitted. Mismatch can be specified as: the VSWR at the load end of. Voltage standing wave ratio (VSWR) is the measure of impedance mismatching between two connected lines. 7 to 12. The website provides the latest Industry news, information on new products, upcoming events, technical articles, white papers, and a parametric component search tool. Figure 6. RF Trap With Attenuators Computes attenuation, return loss, reflection coefficient and VSWR . Calculates VSWR from forward and reflected power. Enter Reflected Power: watts. It's located in our download area . There is also a selection of suitable RF. Edit: if you want to learn the math the Excel sheet has everything laid out so. Will mismatch at either port A or B of a 2-way power splitter/combiner cause significant performance degradation? A. With this calculator, you can calculate the final improved VSWR value when attenuation is inserted between the source and the load impedance that initially do not have a 50 Ohm match. The antenna accepts a certain amount of energy delivered to it by the transmission line (characterized by S11, VSWR, or return loss), and Antenna Efficiency characterizes the amount of energy lost ‘in’ the antenna after this. Match different impedances by attenuation. 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 is determined from the voltage measured along a transmission line leading to an antenna. VSWR should be significantly larger than Min VSWR. The voltage standing wave ratio (VSWR) calculator determines reflection coefficient (GAMMA), VSWR, and return loss (dB) for a mismatched line. ANTENNA CALCULATORS, APPLETS, ANIMATIONS & SIMULATIONS. 98 dB return loss. VSWR (Voltage Standing Wave Ratio) VSWR is a measurement of the level of standing waves on a feeder. VSWR is most often described as a function of the reflection coefficient at the input of a signal chain element. Frequency in Ghz. R • s V ( d )= V + e jβd+Γ L e −j 2 βd) d I ( d )= V + e jβd(1 − Γ L e −j 2 βd) Z o nl. A high VSWR (voltage standing wave ratio) is a problem in reflective type attenuators when compared to the absorptive (non-reflective) type attenuators. VSWR, Return Loss and Reflection Coefficient Calculators. or any device with a web browser. Modelling practical transmission lines. Finally, calculate the Standing Wave Ratio. 43. 25 is average. Free Online Engineering Calculator to quickly convert a Voltage Standing Wave Ratio into Mismatch / Return Loss. The SPECTRAN V6 VSG from Aaronia is a Real-Time Vector Signal Generator that operates from 75 MHz to 6 GHz. Measure S11 across the desired frequency range. Line Type: Belden 8215 (RG-6A) Belden 8237 (RG-8) Belden 9913 (RG-8) Belden 9258 (RG-8X) Belden 8213 (RG-11) Belden 8261 (RG-11A) Belden 8240 (RG-58) Belden. Since reactance represents "stored energy", it is not very useful. Measuring VSWR and Gain in Wireless Systems. RF Calculators. The effect of a short discontinuity in transmission line characteristic impedance. 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. High VSWR values indicate less efficient power transmission and can lead to significant. 14. Skin depth calculator Stripline Impedance calculator Smith charts VSWR/Return loss converter Wavelength calculator Wilkinson splitter designer. VSWR Calculator Pincident watts Preflected watts VSWR VSWR transmitter fold back 1. 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. **Note: All of our calculators allow SI prefix input. 99. It produces white Gaussian noise with an output power of -17 dBm and has a noise output of -117 dBm/Hz. 0; Ambient = +40°C; Inner Conductor = 100°C (212°F); Sea Level; dr y air; atmospheric pressure; no solar loading Attenuation vs. Mismatch Loss (dB). Just in case you don’t care for mathematical equations, here’s a little “cheat sheet” table to help. The reflected energy is now down to a safe level at 22 Watt. Bridged Tee Attenuator Calculator. Mar 23, 2023. Because of this, the effects of mismatch can be minimized by selecting an. 1-866-PASTERNACK (1-866-727-8376) US and Canada only • +1-949-261-1920 International • Email sales@pasternack. This ratio represented in dB is called as. In general, a lower. VSWR is defined as the ratio of the maximum to minimum voltage on a loss-less transmission line (expressed as 3. With this calculator tool you can calculate the resonance frequency of a a cavity ( rectangular or cylindrical ) and a structure on a PCB. For best accuracy, min VSWR should be. Here’s a really simple way of double checking how to much to trim your antenna elements. VSWR = ∞ is the worst condition. The length of a half-wavelength dipole can be calculated by the given formula: L =. 5:1 equates to a Return Loss of 13. Enter Load and Characteristic impedances to calculate VSWR and Reflection Coeffecients. VSWR of 1. VSWR (Voltage Standing Wave Ratio) is a measure of how efficiently radio-frequency power is transmitted from a power source, through a transmission line, into a load (for example, from a power amplifier through a transmission line, to an antenna). And S12 is the power from radio 2 that is delivered through antenna 1 to radio 1. A directional coupler is a passive 4-port device used to sample a small amount of microwave power for measurement purposes. TEM wavelength is the distance between two adjacent peaks or troughs of adjacent cycles of the TEM wave. מדריך שלם ל- VSWR מ-FMUSER [עודכן 2022] בתורת האנטנות, VSWR מקוצר מיחס גל עומד מתח. 24 dB. This is one of those items from the past that Amateur . FieldFox Online Supplemental Help - FieldFox conceptual and reference information. If the antenna reflects 250 watts the VSWR at the antenna will be 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. S 11 =S 22 =S 33 =S 44. You can plot the VSWR circles. SPD701. VSWR to return loss conversion “ Convert 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. Suppose the wave is not matched with load and signal there is some unwanted signals are interrupted or signal loss is occurred. With this equation, you can plug in the value of D and the measured voltages, and finally solve the above. Antenna and cable analyzers are handheld RF test instruments used for on-the-go testing of RF cables and antenna performance at their frequency of operation and quickly locate faults in RF cable, connector, and antenna. Antennas, Unit-Conversions, VSWR, RF power, DSP,. This signal generator offers a maximum. Reflected power ratio for system 1 is 0. RM500Q-GL. The transmitter automatically cuts down the forward power to 90 Watts. Following calculator can be used to convert VSWR to corresponding return loss (RL). One of the most feature-filled examples of RF design software available today is QuickSmith by Nathan Iyer. As an added bonus, the results are modifiable and can calculate the other values. The calculator can also be used to find the value of VSWR using any of the other values. Enter the desired frequency and select the wavelength. A more realistic match for a cable & antenna system is. You can use it for free. It converts the following units: • VSWR • Reflection • Return Loss • Prefl (Power reflection) • Reflections, Reflectionl to Mismatch Uncertainty Enter a value in any field, and all the other values are calculated and displayed. It also presents the data in preassigned plots. It can be used for a wide range of applications including existing wireless standards and 5G NR FR1 in the Sub-6GHz band, Wi-Fi 6E up to 7. Insertion loss can be calculated by measuring the power or signal level before and after a component, device, or system and then finding the difference in dB. 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. 091) (0. 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. To use the calculator, enter the VSWR value for each of the assembly components being added. The concept behind the Smith Chart is simple. It also shows the percentage of forward to reflected power. In impedance measurements using the slotted line technique, the VSWR value is calculated before impedance. VSWR VSWR transmitter fold back 1. Enter all the Resistive values in ohms, C in pF and L in nH. Next, gather the formula from above = SWR = (1+SQRT (Pr/Pf)) / (1-SQRT (Pr/Pf)). This 50-ohm divider has AuSn bumped I/O pads for hybrid assembly and is available in a flip chip surface-mount package that measures 1. Frequency (typical) Frequency (MHz) 30 50 150 220 450 900 1500 1800 2000 2500 5800 8000Fig 4—Smith Chart with SWR circles added. 3360-x16 can be seen below. Use the S11 value in the calculator above to find the equivalent VSWR. com . VSWR & Return Loss Calculator: Enter forward and reflected power or match to determine equivalent values. However, VSWR gives a quick way of estimated how much power is reflected by an antenna. ,100 % power transferred from a source to a load via a transmission line/cable). Calculate RF amplifier pi coupler. VSWR Stands for 'Voltage Standing Wave Ratio' and is used in EMC to specify the effect of a mismatch presented to a test system signal. Note that the outer boundary of the Smith Chart (where =1) corresponds to a VSWR of infinity. Next, determine the forward power. In complex notation it is: Z[Ω] = R + Xj. Wavelength Calculator. As an added bonus, the results are modifiable and can calculate the other values. It varies from 1 to (plus) infinity and is always positive. Calculates Butterworth response analog filters up to the 9th order. Pi Attenuator Calculator. Measure the magnitude of the wave voltages at the coupled and isolated ports. Home. The digital/analog hybrid design provides excellent phase noise performance and spurious response, which compliments the phase coherent nature of these signal sources. The results of this calculator may be rounded, the user takes responsibility for use of results. This file calculates a whole bunch of useful stuff using two-port S-parameters that you can get from manufacturers or measurements. 405 inch. VSWR of 1. VSWR. By making use of an asymmetrical resistive attenuator you can match different impedance's or just use it as an normal attenuator calculator when both the input and. 50:1, the resulting maximum VSWR will be 4. 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. Thus, for this system, VSWR = 1:1 (i. There is a mathematical equation to accurately calculate the VSWR of an RF system. However, each field, when changed will allow. 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. Click here to go to our VSWR calculator Click here to learn about VSWR problems in medical applications Click here to learn about designing for high peak power Click here. This calculator utilises the diameter of the reflector and the operating frequency to calculate critical antenna characteristics such as gain, HPBW, and. Suppose the wave is not matched with load and signal there is some unwanted signals are interrupted or signal loss is occurred. Copper Losses: Loss can occur due to the power dissipation of conducting surfaces. 3 dB. 98dB OR a Mismatch Loss of only. PXI Digitizer by Spectrum Instrumentation ( 68 more products) Download Datasheet Request Quote. WinRFCalc Free Windows RF Calculator. Pasternack's RF Calculators and Conversions section provides engineers valuable and easy-to-use tools ranging from complex mathematical formulas to simple conversions. - Balanced Attenuator Calculator. Inductor; PCB Meander inductor calculator; Mixer spurious;Jan 5, 2018. Although calculators and computers can now easily give answers to the problems the Smith chart was designed to solve, this great chart still remains a valuable tool. 8 is starting to get a little bit over the ideal, however most transmitters will run happily at this. Spektrum is a popular spectrum analyzer program that is used with RTL-SDR dongles. 9913 and LMR-400 are popular “low-loss” RG-8 types. I dared to copycat the title of the above-mentioned blog post. As an example of common VSWR values, a VSWR of 3. 5 GHz. The Smith chart is commonly used to impedance match RF devices, such as amplifiers, antennas and transceiver devices. Calculate VSWR from Forward and Reverse Power. Calculate Voltage and Current at your Antenna's Feed Point! Power (in watts): Impedance (in ohms):VSWR Calculator: วิธีคำนวณ VSWR? อิมพีแดนซ์ไม่ตรงกันส่งผลให้เกิดคลื่นนิ่งตามสายส่ง และ SWR ถูกกำหนดให้เป็นอัตราส่วนของแอมพลิจูดของคลื่น. Noise calculators. Note that we have a VSWR calculator that will allow you to convert between VSWR, mismatch loss and return loss!. The entry unit of frequency can be modified, the output wavelength is calculated in meters. VSWR to Return loss calculator. One of the main advantages of a power splitter is that mismatch at either port A or B is not3. After using our pi pad calculator and installing your attenuator, you can use our VSWR calculator to know how your VSWR has improved. 17% of the input power is transmitted forward, while 0. Calculates the resistor values, attenuation, minimum attenuation, 'impedance', reflection coefficient, VSWR and return loss of a matching Pi attenuator. Click to use the Normalized VSWR calculator,. To do so, calculate the desired return loss and subtract the known load return loss. Characteristic Impedance Ω. DC Blocks are placed within a system to stop any signal with a frequency of Zero Hz (DC) from interfering with sensitive RF components. VSWR = (1 + √ PRFL/PFWD ) / (1 - √ PRFL/PFWD ) back. SINAD to ENOB Calculator. Because the reflection coefficient Γ < 1, then the return loss will have a positive dB value. vary with frequency). In industry, VSWR is sometimes pronounced "viz-wer". Hence, usually, the designers prefer a non-reflective type attenuator. Fortunately, there’s a very easy way to analyze complex loads using graphical methods and it’s called the Smith Chart. Unit Converters. VSWR from Reflection Coefficient. Follow the discussion. Enter VSWR of up to 8 components. —and calculates both the typical system return loss along with the worst case return loss. 2 8. Unequal-split Power Divider Calculator. Circles centered at the origin of the Smith Chart are constant-VSWR circles. More details for v130NX can be seen below. 405 inch. Preflected watts. It measures how much energy is reflected back to the transmitter when a signal is transmitted through an antenna. 8 is 80%, or -0. 01 November 2023, 18:15 CEST. Slotted line impedance measurements use the reflection phenomenon in a slotted line at microwave frequencies to calculate complex impedance. Return Loss (dB) Mismatch Loss (dB). 5G NR Band n71 has a frequency range from 663 - 698 MHz (Uplink) / 617 - 652 MHz. Pincident watts. This morning, I got the following e-mail from a friend of mine who is a member of the University of Michigan Amateur Radio Club. Rectangular Waveguide Sizes. Enter the value for VSWR in the below calculator to find out the values for Reflection Co-efficient, Reflected Power in % and Return loss in dB and the mismatch loss in dB. 8 dB. The NC1128A from Noisecom is a White Gaussian Noise Source that operates from 10 MHz to 10 GHz. 780-444-6767VSWR - Return Loss - Γ Conversions These are the standard set of equations for converting between VSWR, return loss, and reflection coefficient (Γ). e. 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. Enter VSWR (a value greater than or equal to 1) S11 to VSWR Formula S11 = (VSWR-1)/ (VSWR+1) S11 (dB) = 20*Log10 (S11) The input reflection coefficient, S11 < 1 Example Calculation For a VSWR of 1. The online calculators are usable in pop-up mode for easy desktop. 99 $ = 1-Gamma^2$. If the minimum value of voltage (Vmin) shifts to the left of that recorded in the loaded condition. - Pi Attenuator Calculator. Measurement and control of gain and reflected power in wireless transmitters are critical auxiliary functions that are often overlooked. Return loss is when the transmitted signal is not completely. 43 20. Click on the desired link below to use each calculator. Signal Generator by Sanko Technologies ( 2 more products) Download Datasheet Request Quote. 868. Use the S11 value in the calculator above to find the equivalent VSWR. Thus, prime center also represents the 1. Free online SWR power calculator. The concept behind the Smith Chart is simple. or any device with a web browser. 1 Return Loss. The online calculators are usable in pop-up mode for easy. 01. VSWR / Return Loss Calculator. In addition, the software can be used to convert power and voltage units from the linear to the logarithmic scale (and vice versa), convert linear power and voltage ratios to decibels, and convert a VSWR to other. 5. Please enter your values below. 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. This tool calculates the matching network necessary to terminate a line of the specified characteristic impedence (Z o) in a specific complex load impedence (R L + jX L) at a specified frequency. Two years ago, one of our most respected RF experts, Lou Meyer, wrote a blog post describing the technicalities of return loss and voltage standing wave ratio (VSWR) and how the multiple components at a cell site tower make the calculations more complex. VSWR Calculator The VSWR Calculator is a program for reflection unit conversion. Frequency in Ghz. A graphical explanation of energy flow in a practical transmission line. Return Loss. Noise Conversion Calculator. 0:1). 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. Let’s use some of these numbers in the calculator. Installer for the Windows version of dB Calculator. Port Z1 Real, Imaginary Impedance (Ohms) =, j : Port Z2 Real, Imaginary Impedance (Ohms) =, j : Reflection Coefficient (Lin Mag,Deg) =,The VSWR is an important measure of the quality of a radio antenna system. VSWR. The Reflection Coefficient can be calculated from return loss by using the following formula. Three sizes are included so you can have just the right one . This value is usually calculated by discounting any obsticles or reflections that might occour. Figure 1 Given the source and load VSWRs, the VSWR Calc program quickly calculates RF measurement uncertainties. RF & Electronics Symbols for Visio. The Smith Chart achieves this by superimposing a grid on S11 that maps load impedance. RF Path Calculator - Global RF calculators and converters. Wave Vector. The formula for calculating VSWR (V) is as follows: VSWR (V) = (1 + √(Pr / Pf)) / (1 – √(Pr / Pf)) The VSWR quantifies the efficiency of power transfer in the transmission line and helps engineers and technicians identify impedance matching issues and signal loss problems. Then print all or some of the file. The PRS1520 from Peraso is a Beamforming IC that operates in the mmWave range from 24-29. Wave Number. 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. 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. Edit: if you want to learn the math the Excel sheet has everything laid out so that might be see the way to go. EIRP (Effective Isotropic Radiated Power) is the measured radiated power of an antenna in a specific direction. requiring a termination VSWR of 1. Resonant Frequency Calculator. Suitable for VHF (~1. How to improve VSWR – a simple technique to reduce mismatch; VSWR to Reflected Power ; Impedance Mismatch Calculator; VSWR from Forward and Reflected. This online calculator also provides an additional calculator to calculate the value of the. The ratio of incident voltage and reflected voltage is referred as VSWR. 0. 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. It consists of an SP8T switch followed by 7 fixed frequency bandpass filters which are followed by another SP8T switch. Input the VSWR value to derive insights into the Reflection Coefficient, Reflected Power, Return Loss, and Mismatch Loss. Calculate VSWR from Forward and Reverse Power. Stripline Calculator. 905 x 1. It is a measure of how efficiently RF power is transmitted from the power source, through a transmission line, and into the load. 1. It is a measure of how efficiently RF power is transmitted from the power source, through a transmission line, and into the load. 79. 5:1. This attenuation calculator provides as output to the user the. In industry, VSWR is sometimes pronounced "viz-wer". Welcome to our VSWR (Voltage Standing Wave Ratio) calculator, a tool designed to simplify your RF projects by accurately determining the VSWR based on your system’s Source and Load impedances. Reactance Calculator. It is used to calculate and. Calculates the absolute load impedance, reflection coefficient, VSWR, return loss and mismatch loss of a load. 4 GHz Antenna. , the signal reflected back in a transmission line. Power handling may be limited by the connector choice. gamma = 1/3; ratio = vswr (gamma) ratio = 2. November 2023. It can handle a CW input power of up to 6 W, has an insertion loss of less than 9 dB, and an amplitude balance of ±0. Result. But, for a practical system, there will be a small impedance. But it does have a few entry boxes and drop-down menus that can take some time to familiarize yourself with. Standing waves represent the power that is not accepted by the load and reflected back along the. Voltage standing wave ratio (VSWR) (pronounced "vizwar" [1] [2]) is the ratio of maximum to minimum voltage on a transmission line . For example, an oscillator is intended to run at 10MHz. 57. This ratio represented in dB is called as Return Loss. Suitable for VHF (~1. . 2 times the minimum voltage along that line, if the line is at least one half wavelength long. A multi tool Windows program that has been designed to offer the EMC RF and Radio Engineer a large variety of tools for Attenuation calculation, VSWR analysis, FIR Filter calculations, EMC system configuration, Radar testing , RF Filter calculation and much more without the need of a live internet connection. Return Loss S11, and VSWR Calculator. VSWR to Return Loss Formula VSWR = (1 + 10-RL/20)/ (1 - 10-RL/20) Example Calculation A Return. If you only need to convert between GAMMA, VSWR, and dB, you can ignore Zo and ZL. e. vswr Excel calculator. Calculates Chebyshev response analog filters up to the 9th order. This tutorial defines VSWR and explains how it is calculated. Antenna. VSWR Calculation. Let's delve deeper into these core concepts, and. At 1000 MHz, the S11 (dB) = -RL (dB) = -15 dB. 2:1,. The calculator can also be used to find. Welcome to our VSWR (Voltage Standing Wave Ratio) calculator, a tool designed to simplify your RF projects by accurately determining the VSWR based on your system’s. 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. Wavelength Calculator. Noise Temperature to Noise Figure Converter. 0000. VSWR (voltage standing wave ratio, sometimes pronounced "viswar"), is the ratio of the maximum standing wave amplitude at one node to the minimum. It is frequency stable over temperature and has an insertion loss of less than 1 dB.