2 8. When a transmitted wave hits a boundary such as the one between the lossless transmission line and load (Figure 1), some energy will be transmitted to the. Please Support RF Cafe by purchasing my ridiculously low−priced products, all of which I created. RF insertion loss is the reduction in signal power as it passes through an RF component or system. If system 1 is a 40dB attenuator, then the return loss is essentially -10dB, as it 'masks' the S11 of system 2 by 80dB. Select a Choice*. These multiple solutions are possible because each contributor is a vector having both. Now let's look at the response. 미스매칭 환산표 ( Return Loss - VSWR ) 고주파 회로에서의 정합성은 Return Loss(반사손실)이나 VSWR(Voltage Standing Wave Ratio, 전압정재파비)로 표시한다. When a transmitted wave hits a boundary such as the one between the lossless transmission line and load (Figure 1), some energy will be transmitted to the. 0 is the minimum. The equivalent VSWR is 1. This is an ideal open or short circuit, equivalent to VSWR=infinite. Learn about voltage standing wave ratio (VSWR), return loss, and mismatch loss, which helps characterize the wave reflections in a radio frequency (RF) design. Return Loss is similar to VSWR and is generally preferred in the cable industry to a VSWR. 89% of the power is transmitted forward, while 11% is reflected back into the source. 50:1, the resulting maximum VSWR will be 4. Determine how to calculate the effect of VSWR on Return Loss Understand the applications for the equation of VSWR on return loss in electronics 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. It is expressed in dB - A high return loss means more power is lost at the load. 0. These calculators help with unit conversions, VSWR calculations, attenuator design, antenna design, radars, and various other basic calculations that are often required. VSWR to Return Loss Calculator; Cavity Resonance Frequency Calculator; Circular Waveguide Calculator; Rectangular Waveguide Cut-off Frequency Calculator; All Conversion Calculators . 155 dB. This is an online numeric that calculates VSWR based on Return Loss. Return loss quantifies the amount of reflected power, while insertion loss quantifies the loss of power as it passes through the component or device. Forward Power (W) Reverse Power (W) VSWR. A SWR can be also defined as the ratio of the maximum amplitude to. everything RF has this largest selection about online calculators for the RF and Cooking Industry. Just entered the value or click calculation. 2. everything RF has an largest selection of wired calculators for the RF and Microwave Industry. 1) Enter the required input and output impedance and the required attenuation then press "Calculate" below to obtain the Ideal. 011. Because of this, the effects of mismatch can be minimized by selecting an attenuator with the lowest possible VSWR. everything RF has and larges selection from online calculators for an RF plus Microwave Industry. This is an online calculator that calculates VSWR based on Get Loss. 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. Enter a value for VSWR (remember: VSWR should be a number larger than 1. Note that it blows up at the lower cutoff frequency of 6. 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. 891: 6. 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. -30-25-20-15-10-5 0 0. 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. Channel Emulators/Simulators. VSWR Calculation. . Some are based on look-up tables, some completely hide their algorithms. Loss factor. 72 0. 39 0. If the antenna reflects 250 watts the VSWR at the antenna will be 1. Just enter the value and click calculate. The return loss is the ratio of the power of the. The Reflection Coefficient can be calculated. 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. reflection coefficient definition. ☯ Return Loss=20log 10 (VSWR+1/VSWR-1) (dB)A calculator designed to compute the VSWR, reflection coefficient, return loss and matching loss in a transmission lineIt is the ratio between transmitted and reflected waves. 예를 들어 Return loss가 10dB 정도라면, VSWR은 2:1 이하가 되어서 입력매칭이 비교적 잘된 경우로 평가하며, Return loss가 14 dB 정도가 되면 VSWR은 1. It’s typically expressed in decibels (dB) and calculated as the input power minus the output power. A simple, user-friendly RF / Microwave matching calculator that easily matches S1P and S2P files. The formula for mismatch loss is simply: mismatch loss= (1-|Γ| 2) alternatively, mismatch loss=1-ρ 2. Just enter the value and click calculate. 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. Note: The historical definition of return loss results in a negative sign. vswr Excel calculator. 4. It is often expressed in terms of a percentage, or in dB. Note : It is quite possible, that other calculators deliver slightly different results. Always expressed as a ratio to unity, a VSWR of 1. by Eamon Nash Download PDF. P%REF = (VSWR - 1)² / (VSWR + 1)² x 100. VSWR and Return Loss Calculations. 8. 72 0. com If it's electronics,. g. The voltage standing wave ratio (VSWR) is defined. The calculator is a spreadsheet that accepts VSWR specifications for all the components in your RF Path—tower mounted amplifiers, diplexers, bias tees, etc. 011. The MAX2016 outputs the difference between the two power detectors. Therefore, a VSWR of less than 1. e. 4 ms—500 forward and 500 reverse samples are collected on each cycle. Increasing return loss corresponds to lower SWR. Return Loss to VSWR. The component is said to have a loss of 25 dB. 98 dB. Voltage standing wave ratio (VSWR) (pronounced "vizwar" [1] [2]) is the ratio of maximum to minimum voltage on a transmission line . 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. here is an online cascaded VSWR calculator using the RSS method. This calculator shows how return loss (VSWR) affects forward power and calculates the power loss difference caused by two different return loss paths. The return loss is the ratio of the power of the. The issue here is that when one of the traces on the NanoVNA is displaying LOGMAG (or the Base 10 logarithm of the Magnitude of the signal) it is showing you the Return Loss. Note that we have a VSWR calculator that will allow you to convert between VSWR, mismatch loss and return loss!. This tool calculates the Return loss in dB. N -1 = previous stage. p. According to the Andrew design guide, switching our rigid sections to 1. As an example, input power of 100 W (50 dBm) and output of 50 W (47 dBm) yields a cable. Determine the required value of R p. Note: The calculations for Total P1dB and NF use linear values. Descriptions of IL and RL with examples of how the measurements relate to the ratio of Pout to Pin, and Preflected to PinVSWR calculator Enter VSWR, Reflection Coefficient, or Return Loss to calculate remaining values: VSWR Loss Calculator This calculator is designed to give the efficiency loss of a given antenna, based on the input of VSWR: VSWR to return loss conversion Conversion tool for converting between VSWR, return loss and reflection coefficientDESIGN DATA FOR YOUR YAGI. This calculator converts between return loss (RL), voltage standing wave ration (VSWR), and reflection coefficient (Γ). Matching Pi Attenuator Calculator. 8. They will show SWR and Return Loss (RL). entirety RF has the largest selection of online calculators for the RF and Microwave Industry. 5:1 is considered ideal in the RF field, and. everything RF has the big selection of get calculators for the RF and Microwave Industry. Subscribe to receive Mini-Circuits News. A01TKL_ RF Inductor by Coilcraft →. It uses the Voltage Standing Wave Ratio VSWR to first calculate the reflection coefficient Γ . 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. Return loss is when the transmitted signal is not completely. As an added bonus, the results are modifiable and can calculate the other values. Just enter the value and please calculating. Total Cable Assy Loss: (dB) Click link at right to calculate:. Any other value indicates that a portion of the energy is reflected. 5115. (5. 868. As an added bonus, the results are modifiable and can calculate the other values. It varies from 1 to (plus) infinity. This calculator is designed to give the efficiency loss of a given antenna, based on the input of VSWR (voltage standing wave ratio) and other subsequent factors. VSWR table of return loss vs. Forward. What effect does DC current through the main-line have upon performance? A. 64/100) = ±0. This can and online calculator that calculates VSWR based on Return Loss. com +1 (718) 934 4500 +1 (800) 654 7949. And S12 is the power from radio 2 that is delivered through antenna 1 to radio 1. everything RF have the largest selection of online calculators for of RF and Microwave Industry. 2) is considered excellent in most cases. ZoAt 100 MHz, the loss is 0. If VSWR is known, then the reflection coefficient (Γ), return loss (RL), and mismatch loss (ML) is calculated by using following formulas. Thus, to reduce ohmic losses the components are placed very closely. Calculates the absolute load impedance, reflection coefficient, VSWR, return loss and mismatch loss of a load. 12] = 6 dB. 79. Calculators. The ratio of a sinusoidal signal reflected back from the load to the incident signal is called return loss. Effects of Cable Loss in VSWR and Return Loss Measurements By Jim Norton Bird Technologies Group Applications Engineer 1 | Bird Technologies Group 866. Measurement and control of gain and reflected power in wireless transmitters are critical auxiliary functions that are often overlooked. LM = Matching loss in decibels Example . VSWR, or the Voltage Standing Wave Ratio, is the ratio of the maximum. 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. The voltage standing wave ratio (VSWR) at a port, represented by the lower case 's', is a similar measure of port match to return loss but is a scalar linear quantity, the ratio of the standing wave maximum voltage to the standing wave minimum voltage. For example, a VSWR of 1. VSWR = Voltage standing wave ratio. An example of this would be a. 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. Return Loss (dB) VSWR:An online calculator for converting between VSWR and Return Loss, Reflection Coefficient, Mismatch Loss, and Reflected Power. 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. This calculator is specific to the circuit used in the RF Trap With Attenuators FLEXI-BOX. Free online calculators. Pout is the output power or signal level. 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. Reactance Calculator. VSWR specs (specifications) are introduced, along with formulas for mismatch loss and return loss in relationship to VSWR. Please enter your values below. 8. Do y. The return loss of a system is defined as the ratio of incident power to reflected power and is measured in dB. Impedance Matching Pi Attenuator Calculator. The return loss vs. REGISTER. Click Here To Download Product Brochure. Pressing the ‘Calculate’ button with no inputs will load the example below. 1 Return loss in dB = 26. VSWR (input) : Return Loss in dB (output): Return loss calculation EXAMPLE : VSWR = 1. Poor VSWR can cause shadowing in a TV broadcast system as the signal reflected off the antenna reflects again off the power amplifier and is then rebroadcast. VSWR: RL (dB) 1. Then, take the logarithm base 10 of the result and multiply it by 20. every RF has one largest selection of online calculators for the RF and Microwave Industry. VSWR Calculator. The return loss scale is normally set up from 0 to 60 dB with 0 being an open or a short and 60 dB would be close to a perfect match. dBm to Milli Watts Calculator. Return loss is related to both standing wave ratio (SWR) and reflection coef-ficient (Γ). 64% or ±10 x log10 (103. If the power incident on a load is Pi P i and the power reflected. This calculator uses the following formulas for converting the values between the VSWR, return loss, reflection coefficient, and mismatch loss. Reflection Calculator. Measure S11 across the desired frequency range. 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. The calculator is designed to be fine tuned after the initial input. Now, assume a "more perfect" termination of 51 ohms was used. Antenna efficiency is the percentage of radiated power compared to non-relected power. Lower VSWR means lower reflection power (good impedance matching); thus, power transfers to load will be high. Both decimal point and comma are ok. This formula is used to calculate the VSWR from the given return loss. 51 dB, and a return loss of 9. The VSWR is an important measure of the quality of a radio antenna system. Return loss and VSWR are two important measures of efficient power transmission and both of them can be interconverted to obtain the value. SFDR VisualizerVSWR & Return Loss Calculator Enter forward and reflected power or match to determine equivalent values. This is an online desktop that calculations Return Losing based on VSWR. Return loss quantifies the amount of reflected power, while insertion loss quantifies the loss of power as it passes through the component or device. 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. If VSWR is known, then the reflection coefficient (Γ), return loss (RL), and mismatch loss (ML) is calculated by using following formulas. 695. But, for a practical system, there will be a small impedance. By Marki Microwave, Posted Wed May 19 2010. 5:1 VSWR that appears on. 54. Low-pass lumped element filters. At 1000 MHz, the S11 (dB) = -RL (dB) = -15 dB. VSWR. VSWR to Return Loss. Suppose the wave is not matched with load and signal there is some unwanted signals are interrupted or signal loss is occurred. 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 [1, 2] RLdB = 10 log Pi Pr (7. Just entry the appreciate and click calculate. A high VSWR indicates poor transmission-line efficiency and reflected energy. . VSWR (voltage standing wave ratio, sometimes pronounced "viswar"), is the ratio of the maximum standing wave amplitude at one node to the minimum. VSWR is the voltage standing wave ratio it used to measure the all-types waves (example: antenna waves) during transmission. Measure S11 across the desired frequency range. Here is the problem. Home Return Loss to VSWR Conversion Chart Due to mismatches in impedance within the connector, some of the signal is reflected. 6dB. 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. 4 GHz and 5. We did not sweep outside the rated bandwidth of the waveguide. Return loss vs. 21b) VSWR = 1/(q + p), where q = 0. How to Calculate VSWR . 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. Cascaded Noise Figure Calculator Calculate the input referred noise figure for cascaded stages. At small VSWRs, the plus and minus. Measured return loss vs. These results are displayed in. 43 20. Return Loss in decibels (RLdb): Definition: Return loss is the ratio between Forward and Reflected Power in decibels. This calculator uses the following formulas for converting the values between the VSWR, return loss, reflection coefficient, and mismatch loss. VSWR =. The calculator on this page helps determine the loss and that can be factored into the design or RF link budget. 10). Formula. This calculator computes the VSWR, reflection coefficient, return loss and matching loss in a transmission line. That's all for now!Home / Blog Posts / VSWR, Return Loss, Insertion/Transmission loss vs. Reflection -10dB: 1/10 th of the RF energy is being reflected. Then click the "Calculate" button next to the value you just typed to compute the others. Calculate Effective Radiated Power (ERP) With Known Transmission Variables: Transmitter Output Power :. A good VSWR to aim for is at least 1. The voltage standing wave ratio (VSWR) is defined. 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. What is the actual antenna VSWR or return loss?You can calculate return loss when the VSWR is known. Reflection -10dB: 1/10 th of the RF energy is being reflected. This calculator allows calculation of VSWR from Zload (or Yload or S11) and Zo. 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). This makes it a more direct measure of reflections than VSWR. In addition, if GAMMA, VSWR, or dB is known, the calculator can convert between the three. This is an online calculator that calculated Returned Loss based on VSWR. VSWR to Return Loss Conversion Table. VSWR to Return Loss. For a VSWR of around 5. If you don't have Excel you can. The usual function of a transmission line is to convey power from a source to a load with minimal loss. In this context, the term S-parameters or. 4200 | Fax 408. vary with frequency). The calculator on this page helps determine the loss and that can be factored into the design or RF link budget. 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. 4569. 50 from 6 votes. Return loss is related to both standing wave ratio (SWR) and reflection coefficient (Γ). Search for: Components MenuNote that the Insertion Loss is typically low in the desired band of frequencies, and the Return Loss is high. This general RF calculator provides path loss, VSWR and wavelength as well as conversions between many common measurements used in the wireless industry. A power sensor with a return loss of –23 dB is connected to a calibration source with a return loss of –20 dB. Unless you have a piece of slotted line-test equipment this is a hard definition to use, especially since the concept of voltage. Return loss and insertion loss are both measurements of how a component or device affects the transmission of signals in a system. The simulated return loss was −20. Conclusion : In summary, RL and VSWR formulas and calculators are valuable tools that enhance the efficiency. The MAX2016 is a dual logarithmic detector/controller used to monitor the VSWR/return loss of an. microwaves101. Just enter the range and click calculate. number) VSWR or % Reflected Power: MHz: a wavelength in inches or feet: Get Help. The calculator converts between return-loss, VSWR, reflection coefficient, and mismatch loss. 32 dB and 1. Cable insertion loss is known to be 3 dB. VSWR = Voltage standing wave ratio. 868. Usually this is the threshold when most devices are considered. S-parameters are a valuable tool for calculating reflection coefficients and transmission gains for a two-port network's input and output sides. 5. The ratio of the input to the reflected signal is called the Voltage Standing Wave Ratio (VSWR). The table is created by plotting VSWR values against the corresponding return loss values. 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. 557 GHz. In addition, the calculation takes into account the effect of signal attenuation in the transmission line. Coaxial Photos;. 02 (51/50) which produces a return loss of 39 dB, an improvement of 13 dB over the 55-ohm termination. Noise Figure & Noise Temperature Calculator pop-up . I have already calculated the cascaded VSWR and RL using the RSS method (very similar result to simply multiplying each components VSWR as Itay mentioned), but the problem is that the result is not even close to the measured value of return loss. Choose Conversion Calculator or Table: Convert µV to dBm Convert dBm to µV Convert Watts to dBW Convert dBW to Watts Convert Return Loss dB to VSWR Convert VSWR to Return Loss dB Convert Reflected and Forward Power to VSWR Calculate Effective Radiated Power Calculate Effective Receiver PerformanceVSWR of 1. Convert S11 to return loss; Compute Voltage Standing Wave Ratio (VSWR) from Return Loss; References [1]. 1. The return loss of a system is defined as the ratio of incident power to reflected power and is measured in dB. Note the same numerals are used with just a shift in the decimal point. 01. To help the engineers conducting VSWR sweeps, Lou developed the PIM and. The table below converts between VSWR, return loss, reflection coefficient, mismatch loss, reflected power and through power. 0:1). Reflected power ratio for system 1 is 0. VSWR is referring to the maximum and minimum voltage values that is being transmitted and reflected by the component. comOnce the VSWR is known, return loss can be calculated as follows: Return Loss = 20 ∙ log10 () Generally, a higher return loss value is preferable. 2 to 12. 4 GHz. 000Match Efficiency (%) Calculates Match Efficiency. 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. It is expressed in dB. 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. 0:1 indicates perfection (there is no standing wave). The table shows the effects of combining two components in terms of their maximum VSWR and return loss. Author: Marki Engineering Created Date: 11/24/2009 10:57:28 AM. Calculates the resistor values, attenuation, minimum attenuation, 'impedance', reflection coefficient, VSWR and return loss of a matching Pi attenuator. The reflection coefficient is also known as s11 or return loss. everything RF has the largest selection in online hand for. A series of RF calculators for radio frequency engineers. Typically, for field applications, the DTF Return Loss mode is used. 778. 01:1 to 3. This is because the parasitics of lumped elements tend to kill the frequency response as you go higher in frequency. It is expressed in dB. This is an online calculator that calculates VSWR located on Return Loss. everything RF has and largest selection of get home for the RF and Stove Industry. Reflection -3dB: half of the RF energy is being reflected, and thus half of the energy is being received by the device. Γ = Reflection coefficient. 99 $ = 1-Gamma^2$. Return Loss Vs. What is the VSWR ratio to return loss? There is an inverse relationship between Voltage Standing Wave Ratio (VSWR) and Return Loss. 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. Measuring Insertion Loss using RETURN LOSS MODE. How to fill out return loss to VSWR: First, calculate the return loss (RL) value using the formula RL = -20*log (VSWR+1). 1 Return loss in dB = 26. For reference, 20 nanoseconds equals about 4 meters. It turns out that -13. Return Loss. Application Note File. It is specified in dB. Mismatch Loss: Reflected Power Through Power (dB) Coefficient, Γ (dB) (%) (%) 1 17. It also shows the percentage of forward to reflected power. 02 VSWR (i. With this table, engineers can quickly. Dieser is an online calculator that calculates Return Hurt based on VSWR. Reflection Coef. Power to Voltage. Q. 1Thus, for this system, VSWR = 1:1 (i. These calculators and. Return loss is a measure in dB of the ratio of power in the incident wave to that in the reflected wave, and we define it to have a negative value. The return loss at that point has degraded by approximately 5 dB. total RF has the largest selection of online calculators for the RF and Micro Industry. directly calculate and display the resulting VSWR value. The VSWR/Return Loss Calculator will find VSWR, Return Loss, Mismatch Loss, and the Reflection Coefficient based on any one of the listed inputs. Reflection -3dB: half of the RF energy is being reflected, and thus half of the energy is being received by the device. 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. 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. The large number of samples provides averaging, which is necessary in applications. Increasing return loss corresponds to lower SWR. In turn, reflection co-efficient is related to Return loss (RL) by the following formula: Once you have computed the Return loss, RL, VSWR can be arrived at by using the following formula: Typical values for Γ, RL, and VSWR are given below: Note: The above values are approximate only. 43 20. Calculations Pathloss / RSSI; Missmatch Loss; IP3 / SFDR Calculator; IP3, IP2, 1dB Comp. ,100 % power transferred from a source to a load via a transmission line/cable). 51 dB, and a return loss of 9. They are related but measure different aspects of signal performance. Γ is then used to calculate the return loss. This application note supplies a free of charge software tool that can e. Insertion loss is the amount of energy that a signal loses as it travels along a cable link. One is tempted to seek the maximum value and make a “pass / fail” decision based on this value. Return Loss is a measure of the amount of energy that is reflected back at a discontinuity in a Radio Frequency Circuit . 25 on the worst path and the insertion loss is 0. Following calculator can be used to convert VSWR to corresponding return loss (RL). Just enter the value additionally mouse calculate. 97dB. The directivity would be limited to the corresponding return loss, 14 dB. 54 dB (11% of your transmitter power is reflected back). The MCL Microwave Calculator performs 21 calculations commonly needed by RF and microwave system designers in a wide range of applications. 458:1 in VSWR equals 14. 62 GHz, and the measured return loss for the fabricated antenna was −19. This part looks at the closely related. 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. Here's a simple VSWR calculator. termination would give a VSWR of 1. High return loss means low reflected power, so high return loss is good for a system. 000:There are many antenna parameters out there. This usually means that there is an impedance mismatch at the load.