VSWR = Voltage standing wave ratio. Smaller return loss is bad, and means less energy is going into our antenna. comThe formula for the annualized real rate of return takes into account inflation. 99 $ = 1-Gamma^2$. Return lossVSWR Return Loss Calculator. S. 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. Single-ended S-parameter insertion loss characterizes the frequency dependence of signal loss in the device under test, which is single-ended and unbalanced. 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. VSWR (pronounced "viswar"), or the Voltage Standing Wave Ratio, is the ratio of the maximum standing wave amplitude at one node to the minimum amplitude at another node in a system. There is also a selection of suitable RF. Trade return calculators help traders plan their trades based on their risk tolerance. Alternatively, the return loss parameter is commonly used to express Equations 3 and 4. The number 20 then needs to be divided by your starting weight, the result of which is 0. If you need to tap into retirement savings prior to 59½ and want to avoid an early distribution penalty, this calculator can be used to determine the allowable distribution amounts under code 72 (t). The number 20 then needs to be divided by your starting weight, the result of which is 0. The free space path loss calculator takes into account the gain on both the receiving and transmitting antennas. This is an online calculator that calculates Return Loss based on Reflection Coefficient. Telegram. a. 8. Mismatch uncertainty is the result of reflections adding and subtracting from each other when more than one interface is present. Let me explain: An antenna’s Return Loss is a figure that indicates the proportion of radio waves arriving at. This formula is used to calculate the VSWR from the given return loss. Return loss is when the transmitted signal is not completely. (Profit / Cost of investment) x 100 = ROI. ROI may be positive or negative. Return loss, also known as reflection loss, is a measure of the fraction of available power that is not delivered by a source to a load. VSWR. 2. Trade return calculators empower traders to assess risk more effectively by quantifying potential losses and rewards. 367961 = 20*log10 (15. Both decimal point and comma are ok. If the percentage is negative, it means there was an increase and not an decrease. Enter Power into Cable in Watts. 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. 37 or a 37% gain. 859 dB or a gain of 0. As a most basic example, Bob wants to calculate the ROI on his sheep farming operation. From a certain perspective 'Return Loss' is a misnomer. It goes beyond a simple day trading profit calculator, offering an array of features for forex traders. This loss value becomes 0 for 100% reflection and becomes infinite for ideal connection. This can occur when optical fibers are spliced together, mated, or when they are sent through other passive components. If you want to estimate how big your refund will be this year, you’ll be well served by our free tax return calculator. Enter the source characteristic impedance and. 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. 2 dB in some cases! Microstrip and coax circulators and isolators might have losses between 0. If the first pcb trace is 75 Ohm it plays no role. G = Gain. Mismatch Loss: Reflected Power Through Power (dB) Coefficient, Γ (dB) (%) (%) 1 17. We want a small return, so a large loss on the return “echo” is good. Most notably, a circulator generally has a much narrower bandwidth, which is undesirable in test equipment. 5), which will give us 6. The coupler will reduce the outgoing and reflectance power levels by 3 dB plus some loss due to its inefficiency, typically ~ 3. Just enter the value and click calculate. It is a natural phenomenon that occurs for any type of transmission—whether it's electricity or data. 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. They can be calculated using the formula: Heat Loss = Volume x Air Change Rate x Specific Heat Capacity x Temperature Difference. You can use this handy stock calculator to determine the profit or loss from buying and selling stocks. RF & Electronics Symbols for Visio. 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. You cannot simply add up or sum the responses of all the individual components to calculate how the larger structure will behave. Returns Calculator. The result of these calculations is displayed in percentages, but you may also express them in decimal form (e. If the percentage is negative, it. 405 inch. You can learn that you owe the IRS money, that the IRS owes you money or that you’re about even, having paid the right amount in taxes throughout the year. R L 1. Return Loss to VSWR Calculator. Calculate the return loss, mismatch loss, and VSWR of an antenna based on return-loss, VSWR, or reflection coefficient. EIRP Effective Isotropic Radiated Power Calculator Link Budget Calculator Free Space Path Loss Calculator Friis Transmission Calculator. Divide that amount by the absolute value of the starting value. The MF calculator can help you plan your investments with ease from the comfort of your home or while on-the-go. This calculator converts Return loss (RL) to Voltage Standing Wave Ratio (VSWR). Total Investment Fee = (Investment Amount) × (Investment Fee %) ÷ 100. It also calculates the return on investment for stocks and the break-even share price. The paper considered the draft specifications. There are a few reasons why return loss is the preferable specification when evaluating the performance of a transmission system. Generally, both retur n loss and structura l return loss of a simple channel are calculated usin g equations that rely on characteri stic impedance and the impedance of the termination only [ 1]. Using the return loss to mismatch loss. COM impedances should be moved towards neutral, as explained in D2. Enter a value for VSWR (remember: VSWR should be a number larger than 1. return loss Calculator (by using VSWR) Skin. The loss goes to infinity at the lower cutoff frequency. 75 years. Take another look: Starting weight: 200 pounds. power. VSWR Calculator. Manufacturing; Warranty; ANTENNAS . Insertion loss causes due to two factors namely ohmic loss, dielectric leakage and the return loss is caused due to mismatched systems. 1 Return Loss. There is also a selection of suitable RF. $ = \Gamma^2 = 10^{-RL/10}$ Power transmitted ratio for system 1 is 0. The tabs represent the desired parameter to be found. Milli Watts to dBm Calculator. From January 1, 1970 to December 31st 2016, the average annual compounded rate of return for the S&P 500®, including reinvestment of dividends, was approximately 10. In other words, the “return loss” is 10 dB in this example. $70,000 - $50,000. We can then find the return loss as -20 * log(0. This makes it a more direct measure of reflections than VSWR. The reflection loss differs from insertion loss because the return loss signal energy isn’t being lost within the signal chain element, but actually reflected back into the signal. They are useful at design time and for training purposes, both of which stimulated their development and use over the years. 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. To measure the length and attenuation of the fiber, we place the markers on. Condensate Unit Converter**NEW**. •Return loss (RL) is the self-port s-parameter (s ii) versus frequency. If you invest your money in mutual funds, the return on investment shows you the gain from your mutual fund schemes. 5-ton unit. return loss Calculator: This is the dB value of absolute reflection coefficient. It seems shabby, but the effect is much more pronounced over longer periods of time. She’ll calculate her share profit using the following steps: Multiply the current stock price by 50 (the number of shares sold): $407. Take the selling price and subtract the initial purchase price. For five t-line sections each having a VSWR of 1. 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. A well-publicized way of measuring the matched loss of a cable is to measure the magnitude of the reflec-tion coefficient, | ρ|, SWR, or return loss, RL, at one end when the other end of the cable is either shorted or open. VSWR - Return Loss - Γ Conversions These are the standard set of equations for converting between VSWR, return loss, and reflection coefficient (Γ). 10 by 100 and you get 10. Print - Advertisement - A calculator designed to compute the VSWR, reflection coefficient, return loss and matching loss in a transmission line Inputs. We can now use these values to find an equivalent loss for the line. Solving out this formula using order of operations, your calculations should proceed as follows: R = [. 954 dB actually represents a power gain. This is an online calculator that calculates Return Loss based on VSWR. It is an exchange traded share class of the Vanguard 500 index fund. Set the Enter Final Crypto Price to 7000. RF engineers often measure return loss on a “dB. where, Z = input impedance of antenna or scan impedance of array. This rule of thumb enables us to estimate the maximum amount of return loss allowed for a component like a connector or package. 20 / 200 = 0. 2. 707. Forward Power Watts ? Reflected Power Watts ? VSWR → RL (Return Loss) dB → Match Efficiency % → Rho (Reflection Coefficient) → Power Watts Power: dBm Power dBm Power Watts Power (dBm) = 10 x Log [ Power (Watts) ] + 30 dB. reflection coefficient Calculator. The loss between two isotropic radiators in free space, as stated as a power ratio, according to IEEE standards. This calculator converts between return loss (RL), voltage standing wave ration (VSWR), and reflection coefficient (Γ). 08-23)/ (1. 04 dB. step by step, of how to calculate return on assets using the formula above. Return Loss or a VSWR. Insertion loss is only defined for two port networks, but you could bastardize the definition. the final value minus the starting value Total Return on Investment - The total percentage gain (the true ROI) on the investment over the entire timeframe Compound Annual Growth Rate - The value of the total return when. 2 to 12. It is also given. When planning your trade, it is important to understand the potential profit or loss of a trade. But it is more complicated. For example, if an antenna RF input/ouput connector has a return loss of 20 dB, it means that only 1% of the power is reflected back and 99% is transmitted. You can have low insertion loss but high return loss. Return loss can be. 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 load. 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. This impedance mismatch can be with a device inserted in the line or with the terminating load. This calculator allows calculation of VSWR from Zload (or Yload or S11) and Zo. So the return on your investment for the property is 50%. 859 dB or a minimum loss. The basic formula for ROI is: ROI =. 891: 6. P is the amount you invest at regular intervals. BTU/h = Pints/day x 1. If the rate takes a negative form, we have a negative return, representing a loss on the investment, assuming the amount invested is greater than zero. They're taxed at lower rates than short-term capital gains. You simply need to input the SIP amount, the duration of investment and the expected rate of return, and the calculator will wield the results in seconds. VSWR to Return Loss Calculator; Cavity Resonance Frequency Calculator; Circular Waveguide Calculator; Rectangular Waveguide Cut-off Frequency Calculator; All Conversion Calculators . Free Online Engineering Calculator to quickly convert a Return Loss (dB) into a VSWR. Note that it blows up at the lower cutoff frequency of 6. Cable impedance ohm. The rate of return (RoR) is the gain or loss of an investment over a period of time stated as a percentage. Use our free income tax calculator to quickly estimate whether you'll receive a refund or owe the IRS. 99. A table of convenient values are presented at the bottom. A01TKL_ RF Inductor by Coilcraft →. You can calculate it using the following formula: percentage return = (returned amount - initial investment) / initial investment. 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. 50 x 100) = $350. Step-8. M = P × ( { [1 + i]^n – 1} / i) × (1 + i). The 40GBASE-T is a standard for 40 Gigabit/second Ethernet over copper twisted-pair undergoing development by the IEEE P802. When you solve Maxwell's Equations for electromagnetic wave propagation, the electric field solutions look like this: E (z,t) = E * cos (γz - ωt). Return loss is a measure of how well devices or lines are matched. For traders looking for precision, our forex profit loss calculator provides an all-in-one solution. RF Assembly Insertion Loss Calculator. Here's a simple VSWR calculator. 36. Click the “Calculate Return Loss” button. Enter V2 or I2: V or A. Where, RL = Return loss in dB. Enter dB Loss Of Cable Per 100 Ft. Specifically, return loss is related to the reflection coefficient (Γ) as follows: Return Loss (dB) = -20 log10|Γ|. These calculators help with unit conversions, VSWR calculations, attenuator design, antenna design, radars, and various other basic calculations that are often required. As a most basic example, Bob wants to calculate the ROI on his sheep farming operation. This tool provides an estimate of the Return Loss of a cascade of two RF subsystems. Return loss tells you how much of the input signal is reflected. Take the gain or loss from the investment and divide it by the. This online reflection coefficient to return loss calculator calculates the return loss (dB) by entering the reflection efficient Γ (= value between 0 & 1). Return loss, also known as reflection loss, is a measure of the fraction of available power that is not delivered by a source to a load. Gold Investment Calculator will help you, to find your Gold Investment New Worth, Profit or Loss & Profit or Loss %. Note that this calculator does not include any trading fees earned, which may help cushion impermanent losses. Return loss is related to both standing wave ratio (SWR) and reflection coefficient (Γ). , the signal reflected back in a transmission line. e. 72 × 100 = 72%. RF Cascade Workbook for Excel. Return loss is a measure of how well devices or lines are matched. Suitable for VHF (~1. 79. IV is. 10. Return Rate. Active return loss and mismatch calculator with results for absolute impedance, return loss, VSWR, reflection coefficient and mismatch loss. This investment and stock calculator can be used to estimate how much an investment may grow based on your individual inputs. The transmission line model is used in many of the loss calculations. Suitable for higher power (~1800 watts) at HF. Divide that amount by the absolute value of the starting value. You can calculate the rate of return by taking the net profit, dividing it by the initial investment, and multiplying that number by 100 to make it a percentage. e. W-4 PRO. stocks (i. 10 × 100 = 10%. 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. Step 1: Choose the fiat currency that you used to trade, exchange or buy Bitcoin. Gain & Loss Percentage Calculator. 2 8. 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. The measure of this reflected power is called as return loss. Return loss (RL) is the ratio of the reflected power to the incident power, in decibels (dB). Hence, the return loss is always lower than the ideal system (i. This crypto return calculator is designed to show you your percentage gain or loss and also back to break-even. VSWR / Return Loss Calculator. Input Return Loss Var2. For a RL of 1 dB, the mismatch loss is increased to 6. This is an online calculator that calculates Return Loss based on Reflection Coefficient. Return Loss. 12] = 6 dB. Because the reflection coefficient Γ < 1, then the return loss will have a positive dB value. Cascaded Noise Figure Calculator Calculate the input referred noise figure for cascaded stages. Here is the problem. Percentage of gain or loss. ”. Return Loss. This is an online calculator that calculates Return Loss based on VSWR. Reflection Coef. 1) RL dB = 10 log P i P r. Thus with ~ 25% reflected power: Return Loss = -10 x Log [ 100/25. The formula looks like this: (Underlying price - Strike price) - Premium. 3. You can specify insertion loss down to less than 0. For VSWR=2, reflection coefficient will be=1/3 and 20log (1/3) =-9. Claims for loss of earnings can be made when income loss results from insured events like injuries or accidents. e. 8. If you want to estimate how big your refund will be this year, you’ll be well served by our free tax return calculator. 83% is reflected back into the source. If the power incident on a load is Pi P i and the power reflected by the load is Pr P r,. Return loss is the measure of how small the “return” or reflection/echo is. Reflection. You have to put in the desired net income and build up the calculator in reverse. Return Loss is a measure of the amount of energy that is reflected back at a discontinuity in a Radio Frequency Circuit . 1 (55/50) for a return loss of 26 dB. Return Loss (dB) VSWR. For TurboTax Live Full Service, your tax expert will amend your 2022 tax return for you through 11/15/2023. Descriptions of IL and RL with examples of how the measurements relate to the ratio of Pout to Pin, and Preflected to PinEstimate your 2023 - 2024 tax refund for free with TaxSlayer's refund calculator. 1 Background This document describes the loss budgets for USB 3. You can learn that you owe the IRS money, that the IRS owes you money or that you’re about even, having paid the right amount in taxes throughout the year. 5 and 1. Remember : before you start using rules of thumb, be sure to read the Rule of Thumb #0: Use rules of thumb. A table of convenient values are presented at the bottom. 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. Just enter the value and click calculate. 72 0. 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. 36 x 50﹦$20,368. Every year when you file your income taxes, three things can happen. rl — Return loss of antenna or scan return loss of arrayvector in dB. Thus, your percentage return on your $10 per share investment is 70%. At 1000 MHz, the S11 (dB) = -RL (dB) = -15 dB. 17% of the input power is transmitted forward, while 0. Simply enter the weightage of the assets and the percentage change expected to estimate impermanent loss percentage. return loss (dB) (evaluated as neg. For a VSWR of 1. 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. 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. Q: If a business posts a net income of $10 million in current operations,. The 10-year gilt yield rose just over 2% from 1 January to 30 September that year (Data. 79. Radio Frequency Engineering Calculator. With the correct values in place, your equation should look like this: R = [ ( $150 – $125 ) / $125 ] X 100. Spoiler summary : A return loss smaller than -13 dB won’t affect the transmitted signal. This is expected behavior in the pass band of the filter where the match should be close to ideal. Once you know the corporate tax percentage, you can get the profit before taxes and continue estimating your gross income by adding the expected. A fine-tuned understanding of these metrics can guide an engineer to enhance system performance, optimize power transmission, and develop breakthrough solutions. 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%. Please Support RF Cafe by purchasing my ridiculously low−priced products, all of which I created. As the basis for the electrical compliance channels, loss budgets play a key role in ensuring the interoperability of 5Gb/sVentilation Losses. 17. 0 or the results don't mean anything!). Just enter the value of source return loss, input return loss, output return loss, load return loss, device gain, and isolation then the calculator will compute the minimum and maximum gain. RF engineers often measure return loss on a “dB. 36. 200 − 180 = 20. number) VSWR or % Reflected Power: MHz: a wavelength in inches or feet: Get Help. Estimate your tax refund for 2023 by answering a few simple questions about your income with H&R Block’s easy-to-use, free tax calculator. Note that the present tool allows you to find the annual rate of return from an investment, with the option to. Measure S11 across the desired frequency range. Step 2: Now click the button “Solve” to get the profit. dBm to Milli Watts Calculator. The direct method to calculate the return or the holding period return. This calculator converts values between VSWR, Return loss, Reflection Coefficient and Mis-Match Loss. Finally, multiply 0. Return loss in a network is very similar. 1, for system 2 is 0. 44 Conclusion: In summary, RL and VSWR formulas and calculators are valuable tools that enhance the efficiency, accuracy and consistency of RF engineering tasks such as measurement, analysis, troubleshooting and system design. 12] = 6 dB. For example, an efficiency of 0. 12, L = 150ft OUTPUTS: RF Cable Loss = 6. Enter the Noise Figure and gain for each stage. Increasing return loss corresponds to lower SWR. Reflection Coefficient to Impedance Converter Convert a reflection coefficient in Magnitude Angle format into Impedance and vice versa. In an RF system, when power is sent from the source to load, there are three main parameters to be considered: (1) incident power. VSWR is defined as the ratio of the maximum to minimum voltage on a loss-less transmission line (expressed as 3. 2. Subtract any insurance or other reimbursements you. 5 dB to 28 dB. Let's see how this affects an isolation measurement. Any other value indicates that a portion of the energy is reflected. How to calculate Return Loss (dB) using this online calculator? To use this online calculator for Return Loss (dB), enter Incident Power Fed into Antenna (Pi) & Reflected Power by Antenna (Pr) and hit the calculate button. Substantially Equal Periodic Payments / 72 (t) Calculator. Polar or rectangular grids only allow direct reading of S11. The low-pass filter often is a natural choice for lumped element filters. However, convention and some literature quote return loss as a negative value akin to an S (1,1. VSWR (Voltage Standing Wave Ratio) is the measure of how efficiently RF power is transmitted and is expressed as a ratio of the maximum to minimum. Link Budget Calculator. In this situation, 10% of the incident power is reflected back to the source while the balance of 90% is transmitted forward. Note: after you’ve visited this tool once, most devices will save it for usage offline. 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. 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). She’ll calculate her share profit using the following steps: Multiply the current stock price by 50 (the number of shares sold): $407. Self-Employment Calculator. With a loss of 10%, you need a gain of about 11% to recover. Courtesy of Ransom’s Notes. com Bitcoin Profit Calculator to calculate the potential profit or loss from your Bitcoin investments. Return Loss (dB) 3. 1) RL dB = 10 log P i P r. 75 Ohm connector -- 1 inch pcb trace -50 Ohm PCB to PCB connector --1inch PCB trace -- 75 Ohm load, with Return Loss better than 10dB up to 3GHz. 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. VSWR/Return loss converter Wavelength calculator Wilkinson splitter designer. It is typically calculated using the formula: Annualized Real Rate of Return = [ (1 + Nominal Rate) / (1 + Inflation Rate)] – 1. Just Select a City where you bought your gold, select carat, provide your investment amount & select an approx time of investment & then click on Calculate Net Worth Button. Just enter the value and click calculate. 0:1, 2. The name of this parameter, however, might be a bit confusing at first. Experienced tax pros. 13). 10. 0. Facebook. These parameters are often applied to antennas, RF filters and RF amplifiers such as LNA s and PA s. Following RF coaxial cable loss formula is used in this calculator is also mentioned. The next step is to calculate the relation between them by dividing the first one by the second and, in the end, multiplying the result by 100% – don't forget about this step, as ROE is always expressed as a percentage. 10. From a certain perspective 'Return Loss' is a misnomer. Rex Frobenius. 0. S. k. 557 GHz. Power handling may be limited by the connector choice. A high return loss is desirable and results in a lower insertion loss . 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. To use the duct CFM calculator, you must. Here is how the Return Loss (dB) calculation can be explained with given input values -> 5. These multiple solutions are possible because each contributor is a vector having both. Yes, we did that without a calculator. RF insertion loss is the reduction in signal power as it passes through an RF component or system. COM with non-neutral termination impedances is inaccurate 1. Cash Secured Put calculator added—CSP Calculator; Poor Man's Covered Call calculator added—PMCC Calculator; Find the best spreads and short options – Our Option Finder tool now supports selecting long or short options, and debit or credit spreads. 54 dB insertion loss". This requires minimum information from you, which can be. Formally, S11 is the negative of return loss and has. 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. Avg. ". 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. Total Return Formula. A match is good if the return loss is. Isolation Var6. Claim Eligibility. 8 is 80%, or -0. Select the currency pair of your choice. A risk premium is the higher rate of return investors demand. The return loss is the proportion of a signal that is reflected as a result of an impedance mismatch. Formula The reflection coefficient for each element is Γ = 10- (RL/20) The cascaded Return Loss is RL = −20*Log10 (√ (Γ12 + Γ22) Reflection coefficient can be. ROI calculator is a kind of investment calculator that enables you to estimate the profit or loss on your investment. Big parabolic antenna. To calculate the required equipment size, divide the HVAC load for the entire building by 12,000. Alternatively, generate R1 and R2 for a wanted attenuation. This bounce back reflection is called “return”. Just enter the value and click calculate. 54 dB (11% of your transmitter power is reflected. Consider the antenna being used in transmit mode. 9913 and LMR-400 are popular “low-loss” RG-8 types.