For support with the MatchCalc tool, contact tool-feedback@qorvo. Antenna Downtilt and Coverage Calculator. As an example, input power of 100 W (50 dBm) and output of 50 W (47 dBm) yields a cable. RG-8 and RG-213 (50 ohm); and RG-11 (75 ohm) are about 0. The reader is encouraged to do this with the full impedance Smith chart as shown in Figure 3. October 20, 2022. 2 times the minimum voltage along that line, if the line is at least one half wavelength long. Z (impedance, complex number, in ohms), here are 2 examples of Z: Zs = Rs + jXs, source impedance. 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. Visit Return Loss to VSWR converter>> RF Calculator #5 :Effects of Cable Loss in VSWR and Return Loss Measurements By Jim Norton Bird Technologies Group Applications Engineer 1 | Bird Technologies Group 866. The lower the VSWR is, the better the antenna is impedance-matched to the transmission line and the higher the power delivered to the antenna. 0 indicates 44% of the power is delivered to the antenna (3. Return loss can be measured by using microwave and RF test equipment such as a signal generator, directional coupler along with a spectrum analyser or power meter, or alternatively by using a. At 100 MHz, the loss is 0. Upon arriving back at the source, part of the reflected wave is coupled back. This impedance is the equivalent of a 32. Given a return loss (variable = RL ) in dB, the VSWR is calculated as follows: The magnitude of the reflection coefficient is defined as Rho , where Rho = ( 10 ^ (RL/-20)): e. Subscribe to receive Mini-Circuits News. , if RL = 20dB, then calculate Rho = (10 ^ (20/-20)) = 10 ^ (-1) = 0. 0 indicates about 75% of the power is delivered to the antenna (1. VRMSF and VRMSR are measured and the return loss is back calculated. VSWR can also be complex (Re+jIm, in theory) but most people just use it with "Real" values and is always >= 1. Fill in the input field and select the input type and click the "calculate" button to show the values. VSWR / Return Loss Calculator. The calculator is a spreadsheet that accepts VSWR specifications for all the components in your RF Path—tower mounted amplifiers, diplexers, bias tees, etc. 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. 0 0. 15. So a perfect match can be represented by the range 0. 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. A low VSWR will minimize reflections from the antenna. In some cases, users require a custom impedance value. The equivalent VSWR is 1. The below step by step solved example problem may helpful for users to understand how the input values are being used in such calculations to find the ratio of load impedance matching to the transmission line or wave guide characteristic impedance (Z 0). VSWR & Return Loss Calculator: Enter forward and reflected power or match to determine equivalent values. On the other hand, VSWR and the reflection coefficient are connected by the equation: VSWR = (1+|Γ. Despite Equation [Math Processing Error] 10. 2 means a peak voltage 1. vswr-rl変換する計算ツールです。 イノベーションtop; 研究開発の実績; 博士の電波講座; アンテナ作りのこだわりMatchCalc™ RF Design Calculator. VSWR Calculator:(by using RL) return loss(RL)= VSWR = RF Coax Cable Assembly Designer: Most Viewed Companies MegaPhase, LLC. To convert from VSWR to Return Loss, find the VSWR value in the left column. It is due to inherent imbalances in directional devices. 12 VSWR max. November 2023. And S12 is the power from radio 2 that is delivered through antenna 1 to radio 1. 2. VSWR to Return Loss Conversion Table. R = 20log 10 (E incident /E reflected)Pasternack's RF Calculators and Conversions section provides engineers valuable and easy-to-use tools ranging from complex mathematical formulas to simple conversions. e. 091) (0. RF engineers often measure return loss on a “dB. 045 foot length of this part in smaller units: 0. 54dB. S21 is the transmission coefficient of Port 2. Milli Watts to dBm Calculator. 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. Unless you have a piece of slotted line-test equipment this is a hard definition to use, especially since the concept of voltage. Voltage is the pressure from an electrical circuit's power source. 504pF. Fairview Microwave's Waveguide Calculator provides the cutoff frequency, operating frequency range and closest waveguide size for a rectangular waveguide based on the custom inputted broad wall width. VSWR. Pout is the output power or signal level. Enter. VSWR (voltage standing wave ratio, sometimes pronounced "viswar"), is the ratio of the maximum standing wave amplitude at one node to the minimum amplitude at another node in a system. High VSWR values indicate less efficient power transmission and can. 5, the corresponding value of. Γ = Reflection coefficient. It is specified in dB. 1 Return loss in dB = 26. 표현할 때는 VSWR 값을 어떤 비율값처럼 표현하는데, 예를 들어 아래수식에 의해 VSWR이 3으로 계산되는 경우는 VSWR이 3 : 1 이다 라는 식으로 표현한다. 4569. 1, directivity does not depend on the distance from the antenna. The VSWR to RL Calculator employs this formula to convert VSWR values into RL values. 98 dB. VSWR to Return Loss . As an example, F1=750 MHz and F2=850 MHz for a typical cellular frequency band. - Applied attenuation. Wavelength dBm dBuV W dBuVm mWcm2 pJcm2 V VSWR This RF calculator has been developed by Compliance Engineering as a resource for individuals. These are two different ways to measure the same thing. For example, an efficiency of 0. 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. The field calculator is a very powerful but frequently The following pages contain calculator routines, or “recipes”, for use within the Field Calculator misunderstood and underutilized tool within the 3D “Fields” Post-Processor. Solved Example. Unwrapped phase and reference plane extensions. It provides a measure of how efficiently RF power is transmitted from a power source, through a transmission line, to a load such as an antenna. 5:1 정도로써 입력매칭이 거의 완전하게. By Marki Microwave, Posted Wed May 19 2010. so, for instance “. A high. Since it is a logarithmic measurement, it is very useful when displaying very small reflections. This calculator converts Return loss (RL) to Voltage Standing Wave Ratio (VSWR). Figure 1. Return loss can be measured by using microwave and RF test. VSWR to Return Loss Reference/Conversion Table. Loss increases with distance, so understanding the FSPL is an essential parameter for engineers dealing with RF communications systems. This paper further validates this equation against experimental data obtained for. RL OUT = 20log10|S 22 | dB This calculator computes the VSWR, reflection coefficient, return loss and matching loss in a transmission line. Here's the unwrapped phase of S21:by Eamon Nash Download PDF. Return Loss = incident power/ reflected power. 3 Attenuation Frequency (MHz) Attenuation (dB/100 m) Attenuation (dB/100 ft) Average Power (kW) 1. For one example, if. Same-day shipping if you order in the next hours!. Enter VSWR (a value greater than or equal to 1) S11 to VSWR Formula S11 = (VSWR-1)/ (VSWR+1) S11 (dB) = 20*Log10 (S11) The input reflection coefficient, S11 < 1 Example Calculation For a VSWR of 1. These equations can be solved with a personal computer and suitable software, or the parameters may be determined with the Smith Chart. 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. On the other hand, you calculate VSWR by using the maximum and minimum voltage levels of the standing wave pattern on a transmission line. It's assumed that the source impedance is also complex. The following formula relates the return loss and VSWR. transmitter) with the load (i. reflection coefficient definition. Furthermore, a small VSWR reduces reflections from the antenna. Then click the "Calculate" button next to the value you just typed to compute the others. number) VSWR or % Reflected Power: MHz: a wavelength in inches or feet: Get Help. To use the calculator, enter the VSWR value for each of the assembly components being added, as exampled below. 7. 4 centimeters. Pi Attenuator Calculator. Formulas used: s r r. 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. 3 dB. On the other hand, you calculate VSWR by using the maximum and minimum voltage levels of the standing wave pattern on a transmission line. VSWR Mismatch Errors: Both amplitude and phase errors are introduced when mismatched impedances are present at an electrical interface. 3. This calculator shows how return loss (VSWR) affects forward power and calculates the power loss difference caused by two different return loss paths. Calculate the VSWR to 1 decimal place. VSWR to Return Loss . 5:1. net I(RL) V1. Both decimal point and comma are ok. The component is said to have a loss of 25 dB. How to Use? Using the VSWR to RL Calculator involves the following steps: Enter VSWR Value: Input the VSWR value that you want to convert into RL. 46 2. 3. It can be calculated as: In the above formula, G is the reflection coefficient and can be calculated using the following formula: For the circuit in Figure 6, we calculate VSWR to be:Thus, for this system, VSWR = 1:1 (i. 5:1. Mismatch Loss: Reflected Power Through Power (dB) Coefficient, VSWR is defined as the maximum voltage of the standing wave (E max) to the minimum voltage of the standing wave (E min ). Equations $$VSWR = \frac{1 + \Gamma}{1 - \Gamma}$$ $$\Gamma = \frac{VSWR-1}{VSWR+1}$$ $$L_{R} = -20log_{10}\Gamma$$ Hence, the return loss is always lower than the ideal system (i. Forward Power (dBm)Skin depth calculator Stripline Impedance calculator Smith charts VSWR/Return loss converter Wavelength calculator Wilkinson splitter designer. Mismatch Loss: Reflected Power Through Power (dB) Coefficient,VSWR is defined as the maximum voltage of the standing wave (E max) to the minimum voltage of the standing wave (E min ). Voltage Measured Along a Transmission Line. 05 + 1. Return Loss to VSWR Conversion Chart. Voltage standing wave ratio (VSWR) is a way to measure transmission line imperfections. Figure 6. Stripline Impedance calculator Smith charts VSWR/Return loss converter Wavelength calculator Wilkinson splitter designer. reflection coefficient definition. e. You calculate return loss by using the reflection coefficient, which measures the ratio of the reflected wave to the incident wave at a given point in the transmission system. 000:Return Loss (RL) and Voltage Standing Wave Ratio (VSWR) are related through a mathematical relationship. Most RF Coaxial Cables have an impedance of 50 ohms or 75 ohms. S11 is the reflection. You can use our VSWR calculator to see that 1. So Return Loss is positive quantity RL (dB)= Incident power ( Pi)/Reflected power (Pr. Return loss and insertion loss are both measurements of how a component or device affects the transmission of signals in a system. Yoni Calculator Online Test System Configurator ezSample. Return loss is when the transmitted signal is not completely. This calculator computes the VSWR, reflection coefficient, return loss and matching loss in a transmission line. e. Mismatch Loss (dB). The table below converts between VSWR, return loss, reflection coefficient, mismatch loss, reflected power and through power. 205 11. 098Ω resistor in parallel with a 306. You can use it for free. This site comprises a comprehensive array of tutorials and related tools, including explanations, examples, references and charting. In order to get the best power transfer from a source to a load, the source impedance must equal the complex conjugate of the load impedance: Rs + jXs =RL −. Calculate VSWR, Return Loss, etc. 1. U. Lower VSWR means lower reflection power (good impedance matching); thus, power transfers to load will be high. Subscribe to receive Mini-Circuits News. multiplier m=1 RL=50*1 multiplier n=-4 XL=40*-4 multiplier k=2 Z0=50*k Q2: An antenna with a load, ZL=RL+jXL, is connected to a lossless transmission line Z0? What is the phase angle of the reflection coefficient in degrees toRelated Calculators. VSWR is determined from the voltage measured along a transmission line leading to an antenna. From Rho, calculate VSWR= (1+Rho) / (1- Rho). Thus, RL for the system (wrt to the input port) = 17. 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. 0 is the minimum. Using complex impedance is an important technique for handling multi-component AC circuits. By definition currents going into the n-port are counted positively and currents flowing out of the n-port negatively. The Tee attenuator consists of one series resistor at the input and two parallel, one of which is grounded while the other goes to output. VSWR ( VSWR meaning Voltage Standing Wave Ratio) is an important concept in radio frequency (RF) engineering. While return loss analysis can be an ambiguous quality indicator,. 5, the corresponding value of. Suitable for VHF (~1. Finally, an antenna VSWR monitoring system is shown. Return Loss VSWR Reflection. Return Loss (dB) 3. 672 0. and is usually expressed as a ratio, such as VSWR = 3:1. Consumers; Contact Us;A network analyzer can be used to make S parameter measurements. VTX Power in mW. Note: VSWR values were used to calculate the other two related values (rounded to 3 significant places). Determine how to calculate the effect of VSWR on Return Loss. voltage standing wave ratio 020710. This is an online calculator that calculates Return Loss based on Reflection Coefficient. There is an equivalent definition for VSWR, which can also be expressed in terms of the Return Loss (RL). The return loss is the ratio of the power of the. This can be built into a FLEXI-BOX and a transmission line PCB is. The voltage standing wave ratio (VSWR) is defined. S22 would be the reflected power radio 2 is attempting to deliver to antenna 2. Therefore, a VSWR of less than 1. ZoVSWR / Return Loss Calculator. vary with frequency). A calculator designed to compute the VSWR, reflection coefficient, return loss and matching loss in a transmission lineThis VSWR calculator will calculate return loss, mismatch loss, loss in percentage and the reflection coefficient. LOSS VSWR LOSS VSWR LOSS VSWR LOSS VSWR LOSS VSWR (dB) (dB) (dB) (dB) (dB) return loss Vs. Just enter the value and click calculate. VSWR. It measures how much energy is reflected back to the transmitter when a signal is transmitted through an antenna. Step 3. For example, if you wish to input "25000000", just type "25M" instead. 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. Calculates the resistor values, attenuation, minimum attenuation, impedance, reflection coefficient, VSWR and return loss of a resistive matching Pi attenuator. Power (dBm) = 10 x Log [ Power (Watts) ] + 30 dB. Frequency GHz MHz: Distance:Return Loss is basically ratio between Incident power (Pi) on load to Reflected power (Pr) back to source. VSWR is commonly expressed as a ratio. 특히 Return loss와 VSWR의 대략적 값의 관계정도는 암기해두는게 편리할 때가 많다. Matching Pi Attenuator Calculator. 005 Γ 0 0, 1 01 VSWR 1 0and RL 40 dB, which is difficult to achieve in reality. Use the S11 value in the calculator above to find the equivalent VSWR. The below step by step solved example problem may helpful for users to understand how the input values are being used in such calculations to find the ratio of load impedance matching to the transmission line or wave guide characteristic impedance (Z 0). 6 dB of mismatch loss). Enter VSWR, Reflection Coefficient, or Return Loss to calculate remaining values. 5:1 VSWR that appears on. Calculate the VSWR to 1 decimal place. These calculators help with unit conversions, VSWR calculations, attenuator design, antenna design, radars, and various other basic calculations that are often required. The calculator can also be used to find the value of VSWR using any of the other values. 예를 들어 Return loss가 10dB 정도라면, VSWR은 2:1 이하가 되어서 입력매칭이 비교적 잘된 경우로 평가하며, Return loss가 14 dB 정도가 되면 VSWR은 1. Enter the source characteristic impedance and the load impedance then press "Calculate" below. They are related but measure different aspects of signal performance. VRMSF and VRMSR are measured and the return loss is back calculated. , thereby assisting engineers to detect system problems and avoid costly, time-consuming system failures. A known return loss is applied to the RF OUT port. coefficient of Port 1 (also called return loss), and. 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. 5:1 정도로써 입력매칭이 거의 완전하게. Home Return Loss to VSWR Conversion Chart Due to mismatches in impedance within the connector, some of the signal is reflected. At 1000 MHz, the S11 (dB) = -RL (dB) = -15 dB. 3 1700–2200 MHz 1. Useful converters and calculators Return loss (RL) is the ratio of the reflected power to the incident power, in decibels (dB). Linkedin. e. Load serial resistance and reactance ohm. The corresponding value in the right column is the VSWR value. Title: dg03-110. The Voltage Standing Wave Ratio (VSWR) is defined as the ratio of the maximum amplitude to the minimum magnitude of the voltage standing wave at an input port of an antenna. Just enter the value and click calculate. VSWR can be generated by Network Analysers. A ratio of 2:1 indicates that reflections have. Print - Advertisement - A calculator designed to compute the VSWR, reflection coefficient, return loss and matching loss in a transmission line Inputs. e. 0. Understanding VSWR and Return Loss. This is described in more detail on a separate page. This online reflection coefficient to VSWR calculator calculates the VSWR by entering the reflection efficient Γ (= value between 0 & 1). This formula is used to calculate the VSWR from the given return loss. Solution: First the VSWR figures are converted to reflection coefficient magnitudes: Then the mismatch uncertainty is: M u = ±200 (0. In addition, the calculation takes into account the effect of signal attenuation in the transmission line. Pi Attenuator Calculator. Please Support RF Cafe by purchasing my ridiculously low−priced products, all of which I created. Summarizing: Directivity is ratio of power density in a specified direction to the power density averaged over all directions at the same distance from the antenna. VSWR to Return Loss Formula VSWR = (1 + 10-RL/20)/ (1 - 10-RL/20) Example Calculation A Return. Return Loss (dB) VSWR. Return loss = 10 log (Pr / Pi) = 20 log (Er / Ei) For example, if a load has a return loss of -10 dB, then 1/10 of the incident power is reflected. VSWR / Return Loss Calculator; IRA Calculator; Wavelength (TEM) Calculator; Link Budget Calculator . MatchCalc™ RF Design Calculator. RF Works is unable to take liability for. Return Loss (RL) = 10 * log(Pr/Pi) Return Loss (RL) in dB = -20* log(Γ) Lesser value of return loss indicates higher impedance matching and vice versa. VSWR Return Loss Calculator. Matching Pi Attenuator Calculator. Calculates the resistor values, attenuation, 'impedance', reflection coefficient, VSWR and return loss of a Pi attenuator. Reflection Coefficient to Impedance Converter Convert a reflection coefficient in Magnitude Angle format into Impedance and vice versa. 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. Conversion Formulas. The flexible types (9913F and LMR-400UF) are preferred, particularly for rotatable antennas. 1 Return loss in dB = 26. Measured forward power vs. Do y. After using our pi pad calculator and installing your attenuator, you can use our VSWR calculator to know how your VSWR has improved. Suppose the wave is not matched with load and signal there is some unwanted signals are interrupted or signal loss is occurred. Please Support RF Cafe by purchasing my ridiculously low−priced products, all of which I created. The isolation S23 is exactly -20 dB at the center frequency, while the output match is also degraded to about -13. 5:1 VSWR is equivalent to -13. The Tee attenuator (T-pad) is a specific type of attenuator circuit which resembles the shape of the letter "T". Reflection -3dB: half of the RF energy is being reflected, and thus half of the energy is being received by the device. 8. The ratio of the input to the reflected signal is called the Voltage Standing Wave Ratio (VSWR). , there is no standing wave). 405 inch. This collection of RF and Power Management design tools reflects Qorvo's commitment to the engineering community. How to improve the Return Loss of an amplifier. VSWR / Return Loss Calculator: IRA Calculator: Wavelength (TEM) Calculator: Link Budget Calculator **Note: All of our radio frequency calculators allow SI prefix input. Click here for RL to VSWR CalculatorKnowing Return Loss (RL), calculate voltage reflection coefficient Rho= 10^(-RL/20). 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. The Insertion Loss formula is defined as the loss of signal power resulting from the insertion of a device in a transmission line or optical fiber and is usually expressed in decibels (dB) and is represented as I L = 20* log10 (V t / V in) or Insertion Loss = 20* log10 (Voltage / Input Signal Amplitude). As an example of common VSWR values, a VSWR of 3. The VNAs with math modes can also directly calculate and display the resulting VSWR value. In order to improve the VSWR, this calculator also has an extra input for adding an attenuator to improve or reduce the system VSWR. **Note: All of our calculators allow SI prefix input. Note: If you select a waveguide size from the dropdown below, the broad wall width will be automatically calculated along with the other results. A commonly required conversion is between return loss and VSWR, and some values are tabulated in chart, along with a graph of these values for quick reference. VSWR - Return Loss - Γ Conversions These are the standard set of equations for converting between VSWR, return loss, and reflection coefficient (Γ). Example Problem Find the SWR of the transmission line or wave guide whose load or. Clear. The Antenna Downtilt and Coverage Calculator (aka Antenna Tilt Angle Calculator) is used to determine the approximate downward angle, measured in degrees, which the transmitting antenna is to be positioned for optimal signal strength and coverage. Learn about voltage standing wave ratio (VSWR), return loss, and mismatch loss, which helps characterize the wave reflections in a radio frequency (RF) design. VSWR = Voltage standing wave ratioThis calculator uses the following formulas for converting the values between the VSWR, return loss, reflection coefficient, and mismatch loss. Our RF calculators and converters will provide the figures you need for your radio frequency engineering needs. (1) ea Flex Assy - 1. Return loss and VSWR are two important measures of efficient power transmission and both of them can be interconverted to obtain the value. 97dB. These multiple solutions are possible because each contributor is a vector having both. Knowing the VSWR value allows engineers to determine the amount of signal loss that occurs due to reflection and calculate the return loss for the system. A power sensor with a return loss of –23 dB is connected to a calibration source with a return loss of –20 dB. Definition and BackgroundVSWR return loss calculator The voltage standing wave ratio (VSWR), reflection coefficient (Τ), return loss and mismatch loss are all dependant on one or the other, as can be seen by the equations below. 3 2300–2700 MHz 1. These calculators help with unit conversions, VSWR calculations, attenuator design, antenna design, radars, and various other basic calculations that are often required. It is often expressed in terms of a percentage, or in dB. 예를 들어 Return loss가 10dB 정도라면, VSWR은 2:1 이하가 되어서 입력매칭이 비교적 잘된 경우로 평가하며, Return loss가 14 dB 정도가 되면 VSWR은 1. If VSWR is known, then the reflection coefficient (Γ), return loss (RL), and mismatch loss (ML) is calculated by using following formulas. Home. Reflection Coef. Pasternack's VSWR/Return Loss Calculator finds VSWR, Return Loss, Mismatch Loss, and the Reflection Coefficient given any one of the listed input types. The wave 1 going into the n-port at port 1 is derived from the a voltage wave going into a. 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. Specifically, return loss is related to the reflection coefficient (Γ) as follows: Return Loss (dB) = -20 log10|Γ|. In an RF system, when power is sent from the source to load, there are three main parameters to be considered: (1) incident power; (2) reflected power; and (3) power absorbed by the load. 5:1 VSWR is equivalent to -13. In Excel this can be done using the max function such as "=max(0. Next, plug in the calculated return loss value into the formula VSWR = (1 + 10^ (RL/20))/ (1 - 10^ (RL/20)). 11 1. 5 0 0. flectioncoefficientΓ,voltagestandingwaveratio(VSWR) and return loss (RL) and these quantities are interre-lated. Where, RL = Return loss in dB. 1) (2. VSWR measures the ratio of voltage peaks and valleys. Like insertion loss, return loss is also generally described in decibels of power. 41:1 with a return loss of 15. Measured forward power vs. Calculates the resistor values, attenuation, 'impedance', reflection coefficient, VSWR and return loss of a Pi attenuator. 예를 들어 Return loss가 10dB 정도라면, VSWR은 2:1 이하가 되어서 입력매칭이 비교적 잘된 경우로 평가하며, Return loss가 14 dB 정도가. Email. For this type application, Simple slope and offset correction coefficients for the RL measurement are. Return loss can be measured by using microwave and RF test equipment such as a signal generator, directional coupler along with a spectrum analyser or power meter, or alternatively by using a. Return Loss or a VSWR: return loss (dB) (evaluated as neg. 2. Reflection Coef. Complex Impedance for RL and RC. DASAR TEORI. be used to add or subtract an arbitrary number of power, to convert power and voltage units from the linear to the logarithmic. 92 dB 0. Calculate VSWR and Return Loss from Zload (or Yload or S11) and Zo; Calculate Vmax, Vmin, Imax, Imin for lossless line from Zload (or Yload) and Zo; Calculate transmission line Matched Line Loss from Rin of o/c or s/c resonant section; Calculate luminous flux (lm) from luminous intensity (cd) and apex angle (°) Calculate irradiance flux (W/m^2. There are two S-parameters of interest. Our RF calculators and converters will provide the figures you need for your radio frequency engineering needs. 2. SWR / Return Loss Calculator will find VSWR, Return Loss, Mismatch Loss, and the Reflection Coefficient given any one of the listed input types. 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). Enter the source characteristic impedance and the load impedance then press "Calculate" below. Custom. 5 VSWR = Vmax Vmin ≥ 1 VSWR = 1 ∣ 0∣ 1−∣ 0∣ Voltage Standing Wave Ratio VSWR = Voltage Standing Wave Ratio (sometimes just called SWR)Figure 13. Return Loss (RL) is a measure of all reflections that are caused by the impedance mismatches at all locations along the link and is expressed in decibel (dB). VSWR/Return Loss Calculator will find VSWR, Return Loss, Mismatch Loss, and the Reflection Coefficient given any one of the listed input types. This impedance mismatch can be with a device inserted in the line or with the terminating load. Return Loss (dB) 3.