RF Tools This section of the site offers RF engineers quick access to popular calculators and design aids. VSWR Conversion Table. Reflection Coef. Step 1: Choose the fiat currency that you used to trade, exchange or buy Bitcoin. Trade return calculators empower traders to assess risk more effectively by quantifying potential losses and rewards. N -1 = previous stage. Your spouse's IRA/Pension Distributions. Optical return loss is given in units of dB and always a negative value for passive optics, with values closer to 0 representing larger reflections (poorer connections). Return loss can be. 1 (55/50) for a return loss of 26 dB. Finally, multiply 0. This mix of web-based tools and downloadable Windows software was developed to help engineers design faster and more accurately. An online SIP calculator predicts the returns on your SIP based on specific parameters. 0 or the results don't mean anything!). Return loss and insertion loss are both measurements of how a component or device affects the transmission of signals in a system. But each business is different and the amount of business loss you can claim on your tax return depends on your business type, the amount of risk you have in your business, and other. Here almost 80% of the power is reflected while only 20% is transmitted forward. VSWR / Return Loss Calculator. Microstrip impedance calculator Mixer spur calculator mmWave Link Budget calculator Noise Figure/Temp converter Optimal Mitre calculator Path loss calculator Phase Noise to Jitter converter PLL PFD Frequency calculator PLL loop filter calculator Potential divider calculator Propagation time calculator Gamma to Impedance converter Reactance. 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. The VSWR display in the right graph measures the same antenna and the amplitude scale has been setup to match the scale of the Return Loss measurement. Step 3: Finally, the profit for the given amount will be displayed in the output field. With our crypto investment calculator you can calculate your future crypto profit based on starting investment, additional contributions (daily, weekly, monthly, or yearly), rate of return, and years to grow. Knowing this, you probably won't have any problems with a derivation of the return on equity formula: ROE = (net profit. The formula to calculate Return Loss (RL) is: RL = -20 * log10(Pr / Pi) Where: RL = Return Loss (dB) Pr = Reflected Power (W) See full list on allaboutcircuits. A high return loss is desirable and results in a lower insertion loss . VSWR Mismatch Errors: Both amplitude and phase errors are introduced when mismatched impedances are present at an electrical interface. 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. The reflection coefficient is another measure which is closely relate…Return Loss and Mismatch Loss Calculator Calculates the absolute load impedance, reflection coefficient, VSWR, return loss and mismatch loss of a load. Just input cable type, connectors, assembly length, and frequency for a quick calculation of IL in GHz. The paper considered the draft specifications. 54 dB (11% of your transmitter power is reflected. Feb 2, 2017 at 2:37. Self-Employment Calculator. 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. 4 ms—500 forward and 500 reverse samples are collected on each cycle. e. The gain of the antennas offsets the loss by a certain decibel value. How to use Expectancy / Profit Factor Calculator: – Percent Loss will be calculated automatically by subtracting percent Win from 100. There are several steps to calculating a casualty or theft loss: Start with the total loss for each casualty or theft event. Our Forex profit loss calculator can be used as a take profit or stop loss calculator whether you’re actually using sl/tp values or closing the trade manually. VSWR Calculator. This allows you to determine the magnitude of the Reflection Coefficient, which quantifies signal reflection in a system due to impedance mismatches or discontinuities. Asset 1 Price Change. Real loss is transmission loss, corrected for return loss, and is probably the most important quantity to focus on (unless your return loss is poor, say, worse than -16 dB). Assuming the simplest case where system 1 is a cable with nominally zero loss (cannot be exactly zero with a non-zero reflection), then the reflection loss of the whole system will be somewhere between -8dB (when the reflections add in phase) and -14dB (when they add out of phase). Insertion loss is only defined for two port networks, but you could bastardize the definition. The flexible types (9913F and LMR-400UF) are preferred, particularly for rotatable antennas. 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. With our tool, you need to enter the respective value for. This ratio represented in dB is called as Return Loss. Enter Length of Cable in Feet. If your net capital loss is more than. We can then find the return loss as -20 * log(0. In this situation, 10% of the incident power is reflected back to the source while the balance of 90% is transmitted forward. Return Loss 1 (dB. This bounce back reflection is called “return”. In the above formula –. Return loss refers to the loss of reflected signal power. Mutual fund calculator helps you to calculate mutual fund returns on your investment. return loss Calculator (by using VSWR) Skin. While we're at it, the reflection coefficient is: Γ=(75-50)/(75+50)=0. If the power incident on a load is Pi P i and the power reflected by the load is Pr P r, then the return loss in decibels is [6, 7] RLdB = 10 log Pi Pr (2. Because the reflection coefficient Γ < 1, then the return loss will have a positive dB value. It is also given. Thus, for this system, VSWR = 1:1 (i. RG-8 and RG-213 (50 ohm); and RG-11 (75 ohm) are about 0. 1 Return Loss. This makes it a more direct measure of reflections than VSWR. Increasing return loss corresponds to lower SWR. 1) (2. You can think of it as a gauge of how well cables match. As the basis for the electrical compliance channels, loss budgets play a key role in ensuring the interoperability of 5Gb/sVentilation Losses. 17% of the input power is transmitted forward, while 0. Table 1. 1) Enter the required input and output impedance and the required attenuation then press "Calculate" below to obtain the Ideal. Just type the currency name in the search field. Reflected power ratio for system 1 is 0. You can choose different input formats from the drop down menu. Pout is the output power or signal level. Return loss specifies the loss that the incident signal experiences as it returns or reflects from the impedance. Link Budget Calculator. 9) ∗ (0. This rule of thumb enables us to estimate the maximum amount of return loss allowed for a component like a connector or package. 54dB. A lesser known rule is the 70% Rule. This collection of RF and Power Management design tools reflects Qorvo's commitment to the engineering community. 1. circulators (and gyrators). When you look at a graph of a return loss formula, the negative sign is often omitted and is sometimes used interchangeably with the S11 parameter. We can then find the return loss as -20 * log(0. Long-term capital gains are gains on assets you hold for more than one year. 2. 57. Radio Frequency Engineering Calculator. Return loss is the measure of how small the “return” or reflection/echo is. The Smith Chart achieves this by superimposing a grid on S11 that maps load impedance. Return loss can be measured by using microwave and RF test. To calculate Return Loss, you need Reflection Coefficient (r). Note that the Insertion Loss is typically low in the desired band of frequencies, and the Return Loss is high. For a return loss of 10 dB, the mismatch loss is 0. Step 2: Now click the button “Solve” to get the profit. You must optimize the PCB trace impedance to achieve a better return loss or less signal reflection. VSWR Calculator. Return loss and VSWR are two important measures of efficient power transmission and both of them can be interconverted to obtain the value. Every year when you file your income taxes, three things can happen. 43 20. 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. The procedure to use the profit calculator is as follows: Step 1: Enter the cost price and the selling price in the respective input field. Adicot, Inc. k. Advertisement. Anjay. The Egli model is a terrain model for radio frequency propagation. 3. The Return Loss formula is defined as is a measure in relative terms of the power of the signal reflected by a discontinuity in a transmission line or optical fiber is calculated using Return Loss = -20* log10 (Reflection Coefficient). This calculator will convert voltage or power gains into decibels. You can use the Financer. ← Conducted RF Environments With Real RF Devices Vs. 707. This bounce back reflection is called “return”. Calculates the resistor values, attenuation, minimum attenuation, impedance, reflection coefficient, VSWR and return loss of a resistive matching Pi attenuator. Return loss and ISI are related by insertion loss (attenuation) deviation. 5 dB to 28 dB. This rf cable loss calculator uses the return loss measurement available in the analyzer to calculate the cable loss. RF & Electronics Symbols for Visio. 707. power. 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. 2. number) VSWR or % Reflected Power. Step-9. We can now use these values to find an equivalent loss for the line. The 10-year gilt yield rose just over 2% from 1 January to 30 September that year (Data. Measure S11 across the desired frequency range. This discontinuity could be another cable or connector. What is the VSWR ratio to return loss? There is an inverse relationship between Voltage Standing Wave Ratio (VSWR) and Return Loss. To calculate the frictional head loss in a pipe using the Hazen-Williams equation, follow these steps: Multiply the length of the pipe L with the volumetric flow rate Q raised to the power 1. 891: 6. How to Calculate Percentage Decrease. Total return is the total amount of profit (or loss) an investment. The low-pass filter often is a natural choice for lumped element filters. To do so, calculate the desired return loss and subtract the known load return. It also calculates the return on investment for stocks and the break-even share price. The cable Loss consists of conductor wire loss. Follow the following steps to calculate crypto profit/loss: Step 1: Choose the fiat currency that you used to trade, exchange or buy cryptocurrency. It is not uncommon to hear of people who use the 2% or even 3% Rule – the higher, the better. 5:1 is considered ideal in the RF field, and. Insertion loss is almost universally expressed in decibels (dB), and is generally supposed to be a positive number but we forgive you in advance if you ever say "this attenuator has -9. To do so, calculate the desired return loss and subtract the known load return. In an RF system, when power is sent from the source to load, there are three main parameters to be considered: (1) incident power. 5 and 1. The term ‘forward power is synonymous with powered deliver to the load, or thru power. Enter V2 or I2: V or A. VSWR is the voltage standing wave ratio it used to measure the all-types waves (example: antenna waves) during transmission. Therefore, a VSWR of less than 1. This VSWR calculator will calculate return loss, mismatch loss, loss in percentage and the reflection coefficient. 719328 = modulus ( (1. Mismatch Loss: Reflected Power Through Power (dB) Coefficient, Γ (dB) (%) (%) 1 17. Return loss is a measure of how well devices or lines are matched. Return Loss and Mismatch Loss Calculator Calculates the absolute load impedance, reflection coefficient, VSWR, return loss and mismatch loss of a load. Subtract starting value minus final value. i. For example, suppose a US$10,000. This calculation is simply the sum of all worst-case loss variables in the link: Link Loss = [fiber length (km) × fiber attenuation per km] +. Divide that amount by the absolute value of the starting value. Current weight: 180 pounds. There is an equivalent definition for VSWR, which can also be expressed in terms of the Return Loss (RL). 7. You must be 50 years old at the end of the calendar year that you'll pay taxes for to qualify for a catch-up contribution. Insertion Loss Calculator. – Expectancy is calculated by the formula: Expectancy = (Win% x Avg Win) – (Loss% x Avg Loss) * A positive value (above zero) indicates that the trading system is profitable. The basic formula for ROI is: ROI =. Return Loss. In practice, the generally accepted frequency band limits for rectangular waveguide are between 125% and 189% of the lower cutoff frequency, in this case 8. everything RF has the largest selection of online calculators for the RF and Microwave Industry. M = P × ( { [1 + i]^n – 1} / i) × (1 + i). 2 dB in some cases! Microstrip and coax circulators and isolators might have losses between 0. It simply tells you how long it will take to earn back the money you’ll spend on the project. Reflected power ratio for system 1 is 0. Return Loss (RL) can be converted to the Reflection Coefficient (Γ) using the formula Γ ≈ 10^ (-RL/20), where RL is in decibels (dB). Isolation Var6. Polar or rectangular grids only allow direct reading of S11. Check. Gain & Loss Percentage Calculator. 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. Dual Dielectric Coax Calculator. These losses will be worse at impedance transitions as well as signal launch areas. The net profit margin is determined by dividing net profit by total revenues in the following way: net profit margin = net profit / total revenues. 39 0. The calculator will only return data for frequencies below the cutoff frequency of the cable. The Reflection Coefficient can be calculated from return loss by using the following formula. 4. October 20, 2022. The cash-on-cash return, or cash ROI, is the annual rate of return on a rental property based on the cash earned in relation to the cash invested. This impedance mismatch can be with a device inserted in the line or with the terminating load. Note: after you’ve visited this tool once, most devices will save it for usage offline. 3% (source:. Just enter the value and click calculate. Like insertion loss, return loss is also generally described in decibels of power. Whether you're a professional trader or a total newbie in the stock market, this stock calculator will surely come in handy. Here is how the Return Loss of Low-Noise Amplifier calculation can be explained with given input values -> 0. 99 $ = 1-Gamma^2$. Finally, multiply 0. 00 every month, your investment would be worth in if we. The return loss of a system is defined as the ratio of incident power to reflected power and is measured in dB. 1) (7. 10. The following formula relates the return loss and VSWR. Lower insertion loss values are preferable, indicating less signal power loss and better component/system efficiency for RF applications. It is expressed in dB - A high return loss means more power is lost at the load. You can use this handy stock calculator to determine the profit or loss from buying and selling stocks. One of the simplest yet incredibly helpful calculators is Vanguard S&P 500 calculator. comThe formula for the annualized real rate of return takes into account inflation. An online tool for calculating the return loss error for directional couplers and bridges, with both forward and reflected power monitoring. RF Tools This section of the site offers RF engineers quick access to popular calculators and design aids. Claim Eligibility. Depending on your regular income tax bracket, your tax rate for long-term capital gains could be as low as 0%. ,100 % power transferred from a source to a load via a transmission line/cable). 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. Calculate your estimated harvest losses using a representative sample. IV is. This calculator allows calculation of VSWR from Zload (or Yload or S11) and Zo. The networking modernization process is becoming increasingly complex. Percentage of gain or loss. Learn the difference between return loss, mismatch. 1 Background This document describes the loss budgets for USB 3. With COM to a neutral impedance basis, using 109. Increasing return loss corresponds to lower SWR. 1 kW = 1000 W. dBm To Watt Calculator; Noise Factor to Noise Figure Calculator; Noise Temperature to Noise Figure Converter;A single-ended signal is referenced between a single transmission line and the return path. 00036, CLF = 0. Waveguide circulators and isolators have by far the best electrical characteristics. Channel Emulators/Simulators. Convert VSWR to Return Loss and vice versa. Just enter the value and click calculate. Select the desired futures market by clicking the drop-down menu. VSWR is defined as the maximum voltage of the standing wave (E max) to the minimum voltage of the standing wave (E min ). 1 Gallon of water = 8. 011. 405 inch. You can use this handy stock calculator to determine the profit or loss from buying and selling stocks. Thus, if a project cost $75,000 and was expected to return $20,000 annually, the payback period would be $75,000 ÷$20,000 = 3. If all dimensions. This formula is used to calculate the VSWR from the given return loss. USB 3. This is an online calculator that calculates Return Loss based on Reflection Coefficient. Output Return Loss Var3. The online calculators are usable in pop-up mode for easy. [dB] 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. Interactive Tools & Calculators. Radio Frequency Engineering Calculator. 02 dB. This is an online calculator that calculates Return Loss based on VSWR. Thus with ~ 25% reflected power: Return Loss = -10 x Log [ 100/25. 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. 01) ∗ ( 0. 10 by 100 and you get 10. Remember : before you start using rules of thumb, be sure to read the Rule of Thumb #0: Use rules of thumb. ”. Gain a greater understanding of how Return Loss affects signal quality and connectivity. Note: The historical definition of return loss results in a negative sign. The MF calculator can help you plan your investments with ease from the comfort of your home or while on-the-go. Return loss is a measure of how well devices or lines are matched. 05:1 it calculates a VSWR of 1. Net income/loss is found at the bottom. 00: 0. This calculator is used to calculate the uncertainty of gain for any active RF device (mostly amplifier) that occurs because of the impedance mismatch. Divide that amount by the absolute value of the starting value. This calculator uses the following formulas to estimate your potential profits/losses: Profit/Loss Amount = (Investment Amount ÷ Buy Price) × (Sell Price − Buy Price) − Total Investment Fee − Total Exit Fee. 00: 0. 2. Claims for loss of earnings can be made when income loss results from insured events like injuries or accidents. 0:1, 2. For example, if you'd invest $ 5,000. 10. *Strictly, a loss quantity when expressed in dB should be positive. To calculate your profit or loss, subtract the current price from the original price, also referred to as the "cost basis. At The Desired Operating Frequency. Note that the present tool allows you to find the annual rate of return from an investment, with the option to. 1) (7. 2 to 12. For tax years beginning in 2021 and continuing into future years, you can take a loss up to $262,000 if you are an individual or $524,000 for a joint tax return. If the initial value is zero, then no return can be calculated. 5. We know that the nominal loss of the line is 2 dB. 99. s. Note: impedance is a complex quantity, it has real and imaginary parts or magnitude and phase; instruments are almost always calibrated for Zo being some nominal real value, is Xo=0 (eg when people speak of a 50Ω instrument, that means 50+j0Ω even if they don't. For traders looking for precision, our forex profit loss calculator provides an all-in-one solution. It’s typically expressed in decibels (dB) and calculated as the input power minus the output power. These parameters are often applied to antennas, RF filters and RF amplifiers such as LNA s and PA s. Cascaded Output IP3: O i P 3 C = 1 1 I P 3 N − 1 ⋅ G N + 1 I P 3 N [ m W] I P 3 C = 10 ⋅ l o g ( I P 3 C) [ d B m] C = cumulative up to and including stage N. For VSWR=2, reflection coefficient will be=1/3 and 20log (1/3) =-9. 5 dB. The definition of return loss is: For a linear, passive interconnect, the power returned, or reflected, will ALWAYS be smaller than the power incident. Big parabolic antenna. If the power incident on a load is Pi P i and the power reflected by the load is Pr P r, then the return loss in decibels is [1, 2] RLdB = 10 log Pi Pr (7. 72 0. Where TR is the total return ($) CV is. The rate of return calculator allows you to find the annual rate of return of a given investment (see investment calculator), which is the net gain or loss through a given period expressed as a percentage of the initial investment cost. The formula that shows how to calculate option profit looks similar for call and put options. For example, to calculate the return rate needed to reach an investment goal with particular inputs, click the 'Return Rate' tab. COM impedances should be moved towards neutral, as explained in D2. Example Calculation. The transmission line model is used in many of the loss calculations. The name of this parameter, however, might be a bit confusing at first. RF Assembly Insertion Loss Calculator. Follow the steps below to use our simple, free online tool. Find VSWR (Voltage Standing Wave Ratio), Return Loss, Mismatch Loss, and the Reflection Coefficient given any one of the listed input types. Smaller return loss is bad, and means less energy is going into our antenna. Xpert Assist Self-Employment Taxes Business and Home Bundles Tax-Exempt Organizations Estates and Trusts Previous Year's Products. 859 dB or a gain of 0. * A negative value (below zero. Divide this by the pipe diameter D raised to the power 4. How to calculate Return Loss using this online calculator? To use this online calculator for Return Loss, enter Reflection Coefficient (r) and hit the calculate button. Take another look: Starting weight: 200 pounds. Just enter the value and click calculate. It is specified in dB. N -1 = previous stage. RF & Synthesis Tools. Enter Gain of Antenna in dBd. Federal Income Tax Calculator: Tax Return and Refund Estimator (2023-2024) Estimate how much you'll owe in federal income taxes for tax year 2023, using your income, deductions and credits — all. It is a natural phenomenon that occurs for any type of transmission—whether it's electricity or data. Wait, from your Smith chart posts I know we want to keep G low, which, from equation 2 and Table 1, implies keeping return loss high. It also estimates a percentage of current balance required to get to the breakeven point again. For example, an efficiency of 0. Return loss in a network is very similar. The VSWR display in the right graph measures the same antenna and the amplitude scale has been setup to match the scale of the Return Loss measurement. Click the “Calculate Return Loss” button. Radiation loss is design dependent and some circuit designs are more or less susceptible to this type of loss. Power handling may be limited by the connector choice. This means that if the marginal tax bracket you’re in is 22% and your rental income is $5,000, you’ll end up paying $1,100. Specifically, return loss is related to the reflection coefficient (Γ) as follows: Return Loss (dB) = -20 log10|Γ|. 1 Return Loss. To calculate the required equipment size, divide the HVAC load for the entire building by 12,000. e. e the transmitting and receiving end, then the FSPL would just be a factor of the frequency and distance. It also calculates the absolute amount for both. They can be calculated using the formula: Heat Loss = Volume x Air Change Rate x Specific Heat Capacity x Temperature Difference. PI Attenuator Calculator. But for a practical transmission system with load, there will be a small impedance mismatch that will lead to a small amount of incident power reflected back to the source. The 40GBASE-T is a standard for 40 Gigabit/second Ethernet over copper twisted-pair undergoing development by the IEEE P802. 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 the problem. The crypto profit calculator will make it quick & easy for you!. Southwest Antennas offers a number of online RF calculators and conversion tools to help engineers, system designers, and technical salespeople make decisions about their system needs and requirements. Stripline Impedance calculator Smith charts VSWR/Return loss converter Wavelength calculator Wilkinson splitter designer. A calculator designed to compute the VSWR, reflection coefficient, return loss and matching loss in a transmission lineRG-8 and RG-213 (50 ohm); and RG-11 (75 ohm) are about 0. Upon arriving back at the source, part of the reflected wave. Rental income is taxed as ordinary income. reflection coefficient Calculator. $70,000 - $50,000. Crypto Profit Calculator Profit Return Calculator Uniswap V3 Liquidity Analytics Impermanent Loss Calculator Crypto Converter Bitcoin Rainbow Chart Ethereum Rainbow Chart Fear and Greed Index CoinStats Widgets 24h Cryptocurrency Market Report 20,000+ Coin Live Prices 35,000. The winning percentage would be determined as follows: Number of Wins = Total Games Played - Number of Ties - Number of Losses = 25 - 4 - 5 = 16. Same-day shipping if you order in the next hours!. Let's use a simple example to demonstrate. 20 / 200 = 0. How to use the Futures Calculator. You have lost 10% of your starting weight. 93 dB/100ft, 10. From the table we can understand that when the return loss is <10dB, the antenna will be at VSWR >2, indicating the system will reflect >30% power and the performance of the antenna will be <70%. It is an exchange traded share class of the Vanguard 500 index fund. $0. Choose your currency to understand potential profit. Crypto Calculator: A Simple Way to Estimate Profits or Losses. The coupler will reduce the outgoing and reflectance power levels by 3 dB plus some loss due to its inefficiency, typically ~ 3. 46 dB. 2. 54 dB insertion loss". 1) RL dB = 10 log P i P r. 10 by 100 and you get 10. The trace in picture 1 shows a Return Loss measurement of a cellular antenna matched between 806-869 MHz. Every year when you file your income taxes, three things can happen. Load serial resistance and reactance ohm. However, convention and some literature quote return loss as a negative value akin to an S (1,1) measurement on a Network. Rate of Return: A rate of return is the gain or loss on an investment over a specified time period, expressed as a percentage of the investment’s cost. Return loss of antenna or scan return loss of array, returned as a vector in dB. Check E-file Status. However, convention and some literature quote return loss as a negative value akin to an S (1,1. For example, if you'd invest $ 5,000. S. The formula looks like this: (Underlying price - Strike price) - Premium. She’ll calculate her share profit using the following steps: Multiply the current stock price by 50 (the number of shares sold): $407. Put a decent isolator in your signal chain (typically ~1 dB insertion loss, >10 dB return loss and > 20 dB reverse isolation over relevant bandwidth) and subsequent VSWRs won't matter either. 00: 0. Courtesy of Ransom’s Notes. This model was derived from real-world data on UHF and VHF television transmissions in several large cities. 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. This expected value calculator helps you to quickly and easily calculate the expected value (or mean) of a discrete random variable X. The Decibel (dB) calculator calculates the decibel gain (or loss) value from either a power ratio or a voltage/current ratio, according to the above formulas. Cost of Investment. This calculator computes the VSWR, reflection coefficient, return loss and matching loss in a transmission line.