Reflected power ratio for system 1 is 0. VSWR - Return Loss - Γ Conversions These are the standard set of equations for converting between VSWR, return loss, and reflection coefficient (Γ). 43. Value dB. Nice Voltage Standing Wave Ratio (VSWR) calculator is given on this page, converting between reflection coefficient, gamma (in both percent and decibels), and mismatch. The result is an antenna VSWR or return loss measurement corrected for cable loss. 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. 7145 VSWR 6 Directivit y of directiona l coupler 23 dB 0. Where I2 is the cell containing the VSWR. Created Date: 10/21/2015 12:42:40 PM. VSWR merupakan parameter yang juga sebagai penentu matching antara antena dan transmitter. The flexible types (9913F and LMR-400UF) are preferred, particularly for rotatable antennas. Upon arriving back at the source, part of the reflected wave is coupled back. 500 1 Enter Reflected Power 4. 000:RF Calculator: Wavelength, dBm, dBuV, W, dBuV/m, mW/cm^2, pJ/cm^2, V & VSWR This RF calculator has been developed by Compliance Engineering as a resource for individuals involved in EMC and RF compliance measurements. This online reflection coefficient to return loss calculator calculates the return loss (dB) by entering the reflection efficient Γ (= value. Touch Down Points: This Tool will be able to calculate the down Tilt and distance of coverage from antenna for 3dB upper and lower, main loop. 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. 02:1 VSWR VSWRHighSide of 1. Return Loss is a measure of the amount of energy that is reflected back at a discontinuity in a Radio Frequency Circuit . In either case, the resulting VSWR is 1. spacing could be found. The flexible types (9913F and LMR-400UF) are preferred, particularly for rotatable antennas. 6m RG-58C/U to vertical. 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. —and calculates both the typical system return loss along with the worst case return loss. Calculate! Where do these calculations come from? Well, start with the formula for VSWR: If we invert this formula, we can calculate the reflection coefficient (, or the return loss. The calculator is a spreadsheet that accepts VSWR specifications for all the components in your RF Path—tower mounted amplifiers, diplexers, bias tees, etc. (GHz) Nut Attach Attach /Pin in (mm) in (mm) lb (g)The VSWR is about 1. Pasternack's VSWR/Return Loss. Consider the antenna being used in transmit mode. An example of this would be a. 4569. (19/1. Fairview Microwave's Friis Transmission Equation Calculator will calculate the received power from an antenna at some distance given a transmission frequency and antenna gains. It is specified in dB. Stripline Impedance calculator Smith charts VSWR/Return loss converter Wavelength calculator Wilkinson splitter designer. Frequency : MHz. 2. 557 GHz. com This calculator uses the following formulas for converting the values between the VSWR, return loss, reflection coefficient, and mismatch loss. Now VSWR is 1. VSWR to Return Loss. e. 43 20. directly calculate and display the resulting VSWR value. The ratio of the maximum to minimum voltage is known as VSWR, or Voltage Standing Wave Ratio. Convert the VSWR value to a ratio by subtracting 1 from the VSWR value. Calculates the resistor values, attenuation, 'impedance', reflection coefficient, VSWR and return loss of a T attenuator. Link Budget Calculator Determine the received signal strength (in dBm) given a systems amplifier gains, antenna gains and space loss. VSWR of 1. 5:1 is considered ideal in the RF field, and. There is a mathematical equation to accurately calculate the VSWR of an RF system. Enter VSWR, Reflection Coefficient, or Return Loss to calculate remaining values. VSWR (voltage. *Strictly, a loss quantity when expressed in dB should be positive. 93 dB. . Γ = (VSWR – 1)/(VSWR + 1) Return Loss (dB) = -20*Log 10 (|Γ|) Mismatch Loss (dB) = -10*Log 10 (1. 0:1, 2. It's assumed that the source impedance is also complex. Return loss load -2. VSWR is a measure of the reflected power on a transmission line. 1. 1 Return loss in dB = 26. 405 inch. 1, for system 2 is 0. Mismatch Loss: Convert VSWR to Return Loss, Reflection Coefficient, and Mismatch Loss with our easy conversion calculator. Waveguide Calculators. 5:1. 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. Measure the power levels at the input and output of your cable, convert to units of dBm, and calculate the difference. (1)vswr return loss calculator waveguide calculator circular waveguide calculator rectangular wavelength tem calculator wire loop inductance calculator wire microstrip impedance calculator wire over plane inductance calculator wire self inductance calculator wire stripline impedance calculator. After using our pi pad calculator and installing your attenuator, you can use our VSWR calculator to know how your VSWR has improved. 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. A return loss conversion table is used to quickly convert VSWR values into return loss values. 4ghz. This VSWR calculator will calculate return loss, mismatch loss, loss in percentage and the reflection coefficient. Figure 6. This calculator is designed to be an informational and educational tool. 15 + 1. VSWR: RL (dB) 1. This table is particularly useful when designing antenna systems. e. 2 dB due to reflection. In the ideal case where the source, transmission line and load all have an impedance of 50 Ω the VSWR will be 1:1 (perfectly. 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. This calculator shows how return loss (VSWR) affects forward power and calculates the power loss difference caused by two different return loss paths. But the meter at the transmitter will show a VSWR of 1. 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. Use the S11 value in the calculator above to find the equivalent VSWR. 54dB. 예를 들어 Return loss가 10dB 정도라면, VSWR은 2:1 이하가 되어서 입력매칭이 비교적 잘된 경우로 평가하며, Return loss가 14 dB 정도가 되면 VSWR은 1. The equivalent VSWR is 1. 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. The path loss that might be measured in a system however will not be this. Calculate Effective Radiated Power (ERP) With Known Transmission Variables: Transmitter Output Power : W or kW. This site comprises a comprehensive array of tutorials and related tools, including explanations, examples, references and charting. 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. Select the FREQ-RETURN LOSS using the Up/Down arrow key and press ENTER. In some systems. In one typical RF application, VSWR is. 01:1 to 3. Enter the return loss, VSWR or reflection coefficient using drop-down menu to calculate how much power is reflected from or delivered to the load and mismatch loss. 5:1 정도로써 입력매칭이 거의 완전하게. S. Return Loss is similar to VSWR and is generally preferred in the cable industry to a VSWR. It also gives an estimate of the mismatched loss if the mismatch is specified. A match is good if the return loss is high. 4. This calculator uses the following formulas for converting the values between the VSWR, return loss, reflection coefficient, and mismatch loss. Figure 2: VSWR Measurement Principle The return loss at the input and output ports can be calculated from the respective reflection coefficients as follows: Input return loss (RL IN) is a scalar measure of how close the actual input impedance of the network is to theVSWR to Return Loss . For example, an antenna with a VSWR of 2:1 would have a reflection coefficient of 0. S21 is the transmission coefficient of Port 2. The table below converts between VSWR, return loss, reflection coefficient, mismatch loss, reflected power and through power. The MAX2016 is a dual logarithmic detector/controller used to monitor the VSWR/return loss of an. 0. 1) RL dB = 10 log P i P r. Both these parameters are used to find a match between a source and load of a system. Stripline Impedance calculator Smith charts VSWR/Return loss converter. Conversion Formulas. Return loss (RL) is the ratio of the reflected power to the incident power, in decibels (dB). 5 dB, (or a VSWR of 1. Hey, this part is pretty-well matched! You lose less than 0. The first reflection back from each system will be the largest and subsequent reflections will be heavily attenuated, so we. This general RF calculator provides path loss, VSWR and wavelength as well as conversions between many common. 19. As an added bonus, the results are modifiable and can calculate the other values. Enter LO Tuning Range, IF frequency/bandwidth and injection side. How can I calculate VSWR, return loss, and reflected power? Our online VSWR calculator can help you calculate VSWR, return loss, and reflected power based on characteristic and load impedance. A high return loss is desirable and results in a lower insertion loss . 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. Friis Transmission Calculator. 5:1 is considered ideal in the. Stripline Impedance calculator Smith charts VSWR/Return loss converter Wavelength calculator Wilkinson splitter designer. Power handling may be limited by the connector choice. 98 dB. VSWR Calculator. Wavelength Calculator. In some systems this is not a trivial amount and points to the need for components with low VSWR. The calculator will only return data for frequencies below the cutoff frequency of the cable. A good VSWR to aim for is at least 1. 51 dB, and a return loss of 9. Note: VSWR values were used to calculate the other two related values (rounded to 3 significant places). Return lossHome / Blog Posts / VSWR, Return Loss, Insertion/Transmission loss vs. Qorvo MatchCalc is a free downloadable RF/microwave matching calculator with ideal tunable passive components. 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. 333, a mismatch loss of 0. The return loss of a system is defined as the ratio of incident power to reflected power and is measured in dB. VTX Power in mW. Preferred resistor values are entered into the text boxes, similar to the way that values for a prototype may be selected. 0. Now, assume a "more perfect" termination of 51 ohms was used. 30 MB. 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. In one typical RF application, VSWR is. Thus, the 55-ohm termination contributed 26 dB loss to the inherent 6 dB loss of a two-way splitter. Same-day shipping if you order in the next hours!. The usual function of a transmission line is to convey power from a source to a load with minimal loss. There is an equivalent definition for VSWR, which can also be expressed in terms of the Return Loss (RL). 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. As an example, consider a Hewlett-Packard ESG-3000 microwave source operating at 900 MHz. There is also a selection of suitable RF. 09 = 1. There is an equivalent definition for VSWR, which can also be expressed in terms of the Return Loss (RL). Enter the source characteristic impedance and the load impedance then press "Calculate" below. The reflection coefficient is calculated from the VSWR and used to compute the mismatch loss in dB as shown below. 859 dB or a minimum loss of 1. 2. How to Calculate VSWR . Custom. 695. Because the reflection coefficient Γ < 1, then the return loss will have a positive dB value. 011. Return Loss is the ration of the reflected signal to the incident signal. Watts the reflected power would be 1 Watt. The return loss & VSWR is related by the following formula, from which we can calculate return loss for a given VSWR. From this the reflection factor Γ and the Voltage Standing Wave Ratio (VSWR or SWR) could be determined using the following definitions: – Γ is defined as the ratio of the electrical field strength Eof the reflected wave over the forward travelling wave: Γ = Eof reflected wave Eof forward traveling wave. 954 dB is possible. Moreover, return loss is the relationship between both the reflection coefficient (Γ) and the. For those that want to think in terms of VSWR, a 20 dB return loss is equivalent to about a 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. Stripline Calculator. VTX Power in mW. The two VSWRs produce a combined return loss, as follows:. 58 dB in return loss. , the signal reflected back in a transmission line. WhatsApp. Pasternack's Friis Transmission Equation Calculator is a path loss calculation measurement tool that calculates the received power from an antenna at some distance given a transmission frequency and antenna gains. VSWR = Voltage standing wave ratio. 6 Adding VSWR to the MixRG-8 and RG-213 (50 ohm); and RG-11 (75 ohm) are about 0. VSWR adalah VSWR juga dapat di artikan sebagai perbandingan antara gelombang maksimum dengan gelombang minimum. There are two S-parameters of interest. At 1000 MHz, the S11 (dB) = -RL (dB) = -15 dB. 특히 Return loss와 VSWR의 대략적 값의 관계정도는 암기해두는게 편리할 때가 많다. Its VSWR is specified at 1. For example, an antenna with a VSWR of 2:1 would have a reflection coefficient of 0. 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. The low-pass filter often is a natural choice for lumped element filters. 1) (2. 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. 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). S. The resonance calculator, based on user-supplied values of inductance (in nH) and capacitance (in pF), calculates a resonance frequency (in GHz) for the combination of electrical values. The ratio of a sinusoidal signal reflected back from the load to the incident signal is called return loss. Reflection Coef. and Canada (866) 727-8376 International +1 (949) 261-1920Enter the power of your VTX and your antenna's to estimate your range. VSWR. In addition, if GAMMA, VSWR, or dB is known, the calculator can convert between the three. Γ = Reflection coefficient. VSWR Calculator. 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. Stripline Impedance calculator Smith charts VSWR/Return loss converter Wavelength calculator Wilkinson splitter designer. LO Tuning Range (MHz) to :Using an oscilloscope to measure R, X, VSWR and power. There is also a selection of suitable connectors. Return Loss to VSWR. A power meter may also be used to calculate cable loss. 4) The reflection coefficient is calculated from the characteristic impedance of the transmission line and. 458:1 in VSWR equals 14. Suitable for higher power (~1800 watts) at HF. Formulas used: s r r. Pressing the [Calculate] button with no inputs will load the example below. Matching Pi Attenuator Calculator. WhatsApp. 405 inch. Typically, for field applications, the DTF Return Loss mode is used. 2) is considered excellent in most cases. It is expressed in dB. Forward Power Watts ? Reflected Power Watts ? VSWR →. 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. 5), which will give us 6. 02 dB. Return loss = -20 * log(Γ) For example, if the VSWR value is 3 : 1, we will first have to find the reflection coefficient's value using it, Γ = 0. Add to My Products Lists. 25 on the worst path and the insertion loss is 0. To do so, calculate the desired return loss and subtract the known load return. g. Telegram. ,100 % power transferred from a source to a load via a transmission line/cable). Suitable for VHF (~1. VSWR Calculator The VSWR Calculator is a program for reflection unit conversion. 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. Note: The calculations for Total P1dB and NF use linear values. Return loss vs. Just enter an value and click calculate. 05 VSWR max. Electrical waves reflect when they encounter a change in the impedance of the medium they are traveling in. 5:1 VSWR is equivalent to -13. Pasternack's VSWR/Return Loss Calculator finds VSWR, Return Loss, Mismatch Loss, and the Reflection Coefficient given any one of the listed input types. 8ghz. As an added bonus, the results are modifiable and can calculate the other values. Free online calculators. As the VSWR increases, so also does the percentage of reflected power. 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. 5. Just enter the value and click calculate. 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. 1 Return Loss. 200mW. 02 (51/50) which produces a return loss of 39 dB, an improvement of 13 dB over the 55-ohm termination. Return loss can be converted to mismatch loss and the calculator also gives an intuitive sense of the impact by providing the forward and reflected power ; Related Posts. 707. The method generally makes sense in that the return loss, or VSWR, performance of each element in a transmission system additively degrades the system return loss. A series of RF calculators for radio frequency engineers. 01. Telegram. The calculation of loss using VSWR is an approximation that is reasonably accurate on long lines with low VSWR and low loss. The table shows the effects of combining two components in terms of their maximum VSWR and return loss. Facebook. The following equation is especially useful when using a directional power meter. In some systems this is not a trivial amount and points to the need for components with low VSWR. As the VSWR increases, the quality of the match deteriorates and more power is reflected back. R = 10log 10 (P incident /P reflected) and. The graph below shows input return loss for an amplifier. Click here to use the VSWR. 9913 and LMR-400 are popular “low-loss” RG-8 types. Mixer Spur Search Calculate a list of mixer spurious responses for a set frequency plan. Noise Factor to Noise Figure Calculator. If VSWR is known, then the reflection coefficient (Γ), return loss (RL), and mismatch loss (ML) is calculated by using following formulas. 9, for system 2 is 0. 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. However, convention and some literature quote return loss as a negative value akin to an S (1,1) measurement on a Network. 25 on the worst path and the insertion loss is 0. 01. By Marki Microwave, Posted Wed May 19 2010. VSWR. Please Support RF Cafe by purchasing my ridiculously low−priced products, all of which I created. 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. This calculator converts Return loss (RL) to Voltage Standing Wave Ratio (VSWR). 1. This ratio represented in dB is called as Return Loss. 4 GHz. VSWR, Return Loss and Reflection Coefficient Calculators. 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. Load return Loss Var4. This test can be performed in the DTF Return Loss or DTF VSWR mode. RF Calculators. This collection of RF and Power Management design tools reflects Qorvo's commitment to the engineering community. In order to improve the VSWR, this calculator also has an extra input for adding an attenuator to improve or reduce the system VSWR. 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 wireless communication. If “V” is used, then the ratio is defined to voltage level of a standing wave at a line. It is specified in decibels (dB) relative to a short circuit (100 percent rejection). Calculates the resistor values, attenuation, minimum attenuation, 'impedance', reflection coefficient, VSWR and return loss of a matching Pi attenuator. The formula and equations used by this calculator are also provided. VSWR - Return Loss - Γ Conversions These are the standard set of equations for converting between VSWR, return loss, and reflection coefficient (Γ). Formula. The losses are due to copper losses/skin loss and for more esoteric antennas (planar types) it's usually dielectric loss. 4 to 1. 2:1 (or simply 1. This impedance mismatch can be with a device inserted in the line or with the terminating load. 600mW. 002 respectively as shown in table-6 for the notch width, g=1. 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. VSWR. 333, a mismatch loss of 0. The calculator is designed to be fine tuned after the initial input. Load serial resistance and reactance ohm. For example, a VSWR of 1. Free Space Path Loss Calculator Calculate the loss for a given distance at an RF frequency Enter distance in km and frequency in either MHz or GHz. In this context, the term S-parameters or. 0:1). Just keep in mind that SWR and Return Loss are both indicators of the quality of the transmission line to antenna feedpoint Z match. e. Return loss, also known as reflection loss, is a measure of the fraction of power that is not delivered by a source to a load. 794VSWR Calculation. Antenna Downtilt and Coverage Calculator. It is a natural phenomenon that occurs for any type of transmission—whether it's electricity or data. Just enter the value and click calculate. It's to be noted that this VSWR calculator can also be used in the reverse direction in order to find VSWR if the. 2dB typical, less than 0. The VSWR can easily be converted into Return Loss ( RL R L ) using the following formula: RL = 20log10(VSWR + 1 VSWR − 1) R L = 20 log 10 ( V S W R + 1 V S W R − 1) Directional power meter. dBm To Watt Calculator. Author: yuuki. 57. To calculate the Return Loss, add 1 to the VSWR and divide the result by the VSWR minus 1. Các ứng dụng của VSWR: Các chức năng chính của VSWR : Truyền Antenna: Tỷ lệ sóng đứng điện áp (VSWR) là một chỉ báo về lượng không phù hợp giữa một ante nna và đường cấp dữ liệu kết nối với nó. Enter Forward Power 100. This formula is used to calculate the VSWR from the given return loss. Both decimal point and comma are ok. Therefore, a VSWR of less than 1. Return loss can be measured by using microwave and RF test. Γ = (VSWR – 1)/(VSWR + 1) Return Loss (dB) = -20*Log 10 (|Γ|) Mismatch Loss (dB) = -10*Log 10 (1 – |Γ| 2) Conversion Tables. VSWR can be generated by Network Analysers. Mismatch Loss: Reflected Power Through Power (dB) Coefficient, Γ (dB) (%) (%) 1 17. Effects of Cable Loss in VSWR and Return Loss Measurements By Jim Norton Bird Technologies Group Applications Engineer 1 | Bird Technologies Group 866. 5. 98dB = 96. Set the start and stop frequencies F1 and F2. A negative loss of 0. VSWR (Voltage Standing Wave Ratio) and Return Loss both measure the same parameter i. Let’s start by looking at a 2-port device illustrated in Figure 1. Mismatch loss. PI Attenuator Calculator. VSWR/Return Loss Calculator will find VSWR, Return Loss, Mismatch Loss, and the Reflection Coefficient given any one of the listed input types. Suitable for higher power (~1800 watts) at HF. Convert VSWR to Return Loss, Reflection Coefficient, and Mismatch Loss with our easy conversion calculator. Here Click here to learn more about VSWR. Mismatch loss is the ratio of power delivered to power available, and is a simple function of reflection coefficient. RF Trap With Attenuator Calculator Calculates the attenuation, 'impedance', reflection coefficient, VSWR and return loss of a circuit that incorporates a RF tank circuit into a Pi attenuator. Pressing the ‘Calculate’ button with no inputs will load the example below. Email. Lumped 2-way Wilkinson Splitter Designer Enter the frequency of operation and system Z0. return loss Calculator:(by using VSWR) Formula is:: VSWR= return loss = VSWR Calculator: This is the ratio of maximum voltage to minimum voltage in standing wave pattern. VSWR is essentially the ratio of the Input Impedance to the average Characteristic Impedance as a result of. This trace would typically be accepted as good. 0. The view of any reflected voltage wave alone so see the reactive part would need the reflected current to plot the ratio, so it is not used. 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. 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. Forward. 17. This is a measurement of how much energy is either radiated or is dissipated in heat, due to resistive or dielectric losses. These parameters are often applied to antennas, RF filters and RF amplifiers such as LNA s and PA s. 또한 안테나의 경우도 실무상에서 Return loss보다는 VSWR로써 비교할 때 좀더 실질적인 비교가 가능하기도 하다. For example, if you wish to input"25000000", just type "25M" instead. October 20, 2022. Enter Your Values. In logarithmic terms, the formula for return loss is given as: Even if the measured reflection value on the VNA is -25dB, the negative sign is ignored when representing return loss. Return Loss and Mismatch Loss Calculator Calculates the absolute load impedance, reflection coefficient, VSWR, return loss and mismatch loss of a load. Learn about voltage standing wave ratio (VSWR), return loss, and mismatch loss, which helps characterize the wave reflections in a radio frequency (RF) design. That is, the amount of signal reflected by a connector. 5:1 정도로써 입력매칭이 거의 완전하게. Return loss is a measure of how well devices or lines are matched.