By using the provided formula and examples, as well as addressing common questions, you can confidently work with transmission. It is possible to ascertain the relevant behaviors of a transmission line using elementary circuit theory applied to a differential-length lumped-element model of the transmission line. 0 Conductor Type This section is used to add, remove, rename, and edit the information related to the conductor types. If the voltage and current to the motor are 400 V and 8. This calculator is a tool for designing balanced transmission lines with a specific desired characteristic impedance Zc and made of parallel square stock conductors of a given side length d. Written in Visual C++. A tool perform calculations on the concepts and applications for Transmission Lines calculations. All the math involved is well explained and documented by Dan AC6LA on his site. An extension of the "calculator" originally published in ELECTRONICS in January 1939. 3. At this point, it has been carried out a general analysis to determine the. This chapter is. This is a special scenario. Dependencies. James F. Choose the connection type. Dielectric loss is lower in a CPW line than in a microstrip line as the electric field lines are evenly divided between the air and dielectric, whereas with a microstrip line most of the field is concentrated in the dielectric. 2. The model uses an infinitesimally small section of a transmission line with four elements as shown below. The NIST site offers a variety of free software, including various on-wafer calibration software (MultCal, for TRL and LRM), transmission line calculators, uncertainty calculators etc. Reference: R. A signal travels on a PCB transmission line at a slower speed, affected by the dielectric constant (Er) of the PCB material. To determine the characteristic impedance of the parallel-plate waveguide first calculate the voltage of the top plate with respect to the bottom plate. 1. Technical Losses. It simplifies the sag tension calculation process by automatically performing the required calculations based on the input data. This web page allows you to calculate the width and length of a microstrip line for a given characteristic impedance (Zo) and electrical length or. This will also provide the time delay the cable provides for a signal and also the capacitance and inductance per. When you solve Maxwell's Equations for electromagnetic wave propagation, the electric field solutions look like this: E (z,t) = E * cos (γz - ωt). Z = Impedance of circuit element (i. Coaxial Cable. Reply. 5 To calculate transmission system losses for the initial state for an hour, create an hourly base case in PSS/E using:The source for formulas used in this calculator (except where otherwise noted) is the Design Guide for Electronic Packaging Utilizing High-Speed Techniques (4th Working Draft, IPC-2251, February 2001. Importance of the Impedance Curve / Bass Reflex Alignment. Identify best matched Rogers' bonding material by sorting according to design attributes. The two most common impedances that are. Transmission lines Transmission line concepts and an online transmission line calculator by Owen Duffy, VK1OD. end Resonances on open transmission line. At low frequencies near 0 GHz, the input impedance is inductive since. Access technical papers, white papers, calculators, tools and more for circuit laminates, prepreg and bonding materials. 8. Microstrip Impedance Calculator. for a range of transmission lines. Inductance Calculator. This video demonstrates the use of the transmission line calculator. The tool provides two networks that will have the desired impedence at that frequency. freq = linspace (1e9,4e9,51); sparam = sparameters. It consists pair of parallel conducting wires separated by a uniform distance. Internal traces : I = 0. Calculates the characteristic impedance and per-unit-length inductance, capacitance, resistance and attenuation of transmission line geometries. Transmission lines are used to guide waves of alternating current and voltage at radio. R w = Terminating resistance between two. TX-LINE software is a FREE and interactive transmission-line utility for the analysis and synthesis of transmission-line structures that can be used directly in Cadence ® AWR ® Microwave Office ® software for matching-circuits, couplers, and other high-frequency designs. Then enter the values of. 19. Vs = Sending end phase voltage. Simply enter 3 parameters and it will instantly calculate a solution with an interactive graph – job done! This software is available free of charge and downloadable below. 2. Formulas are provided for each configuration. Nist, KQ6QV has free software for calculating arbitrary transmission line impedance, as well. cables in the 1850s. 3. Figure 2—These are the most common types of transmission lines you’ll encounter in ham applications. The Smith chart, initially conceived in 1939 for transmission-line analysis, is a transformation of all impedances in the right-half Argand plane (RHP) into a unit circle (Smith, 1939). If this were a load on the line, we recognize from transmission-lineNovember 15, 2023 by Rafay Javed. Radford in Wireless World magazine. 3, Kevin Schmidt, W9CF. 1 to 100 MHz or 1 to 1000 MHz. Lab1 - Transmission Lines Objective To learn transmission lines and time-domain refectometer (TDR). The GUI has been ported from the GIMP toolkit (GTK) to Qt. When most hams think of transmission lines, the word “coax” comes to mind. 6 on a resistance circle means a resistance of 1. 60 Hz. Calculate the Effect of Additional Mass on the Thiele-Small Parameters. Transmission-Line Calculator. Also, what is the magnitude of the average reflected power if |Vo|=1? 3- Make sure you understand the slotted line problem. VSWR is a parameter used by engineers to know the degree of mismatch between a transmission line and a device (like an antenna or a transmitter/receiver circuit). TX-LINE software is a free and easy-to-use Windows-based interactive transmission line calculator for the analysis and synthesis of transmission line structures. This is a required field. It is a 2D simulator based on a finite difference approximation to Laplace's Equation. Antenova's Transmission Line Calculator. some spacers to place periodically along the wire, positioned to maintain a relatively constant spacing. These equations are relatively simple compared to other transmission line geometries, comprising only 2 interrelated equations for the microstrip impedance. A Clemson ECE635 Project by Adam Schreiber and Jason Byers. THESE FORMULAS ARE APPROXIMATIONS! They should not be used when a high degree of accuracy is required. Where: Loss is the power lost in the transmission line. A transmission line speaker calculator is a tool, often digital, which assists in determining the ideal length of a speaker's transmission line. If you want a quick and dirty way to design your traces to have a specific impedance value, you can use an online transmission line calculator. Transmission-Line Calculator. An experiment has been performed to compare the calculated and measured magnetic fields produced by a double-circuit 400 kV transmission line. Transmission line calculators. Zo (unloaded trace impedance, Ohms) = Tpd (unloaded propagation delay, ps/unit len) = Cl (distributed capacitve load, pf) = len (transmission line Length) = Zl (loaded Impedance, Ohms) = 1%, 5%, 10% Component Value Calculator. H 2 H 2 = subtrate height 2. Transmission line loss calculator. Transmission lines (sometimes called feed lines) can take many forms (see Figure 2). A transmission line should have a uniform characteristic impedance to avoid signal reflections. Click on Help in the Transmission Line Calculator for more information. This calculator helps you calculate the characteristic impedance of a coaxial cable given its dimensions. Thickness: Thickness of the microstrip conductor. The Sierra Circuits Impedance Calculator uses the 2D numerical solution of Maxwell’s equations for PCB transmission lines. To conduct the correct three-phase power calculation to the problem given above: Identify the given parameters — active power = 5 kW, phase voltage = 400 V and line current = 8. The propagation delay is the time a signal takes to propagate over a unit length of the transmission line. These parameters include: Characteristic impedance (Z 0): The online calculator can compute the characteristic impedance of a transmission line, which is the ratio of voltage to current in a. This tool is designed to calculate the correct dimensions of a microstrip patch antenna if the operating frequency and the dielectric constant of the material used, is known. Here is how the Sag of Transmission Line calculation can be explained with given input values -> 3. Black dots represent electrons, and the arrows show the electric field. Access Rogers' calculators, literature, technical papers and request samples on your smart phone or tablet through the ROG mobile app. There are two types of Transmission and Distribution Losses: Technical Losses; Non Technical Losses (Commercial Losses); 1. As computers send signals between one another, there are delays based on the distance between the two routers. A rule-of-thumb for transmission line “shortness” is that the line must be at least 1/4. Transmission Line Parameters. The transmission line model is used in many of the loss calculations. 44 x A0. Equation. Two properties characterize the PCB dielectric materials:Edge Coupled Stripline Differential Impedance Calculator. This transmission line calculator. This calculator is a tool for designing balanced transmission lines with a specific desired characteristic impedance (Z_ ext{c}) and made of parallel circular conductors of a. The trace width can then be calculated by re-arranging this formula to determine the cross-sectional area that. The transmission line geometries are cross sections and the values calculated are the inductance per unit length. Description. The equations that are used to calculate stripline impedance are simple, but there is a large number of terms, which includes a. In the field of electrical engineering, it's important to calculate the characteristic impedance Z 0 to analyse the transmission lines. When the transmission line is terminated in a resistance=R, the injected step input on reaching the end of the transmission line is met by a constant impedance=resistance R at that instant. Coax Cable Transmission Line Models. Crosstalk occurs when a signal "jumps" from one trace to another, a phenomenon that is unintentional and often unwanted. Transmission line loss calculator. Under common mode driving (same magnitude, same polarity), the even mode impedance is the impedance of one transmission line in the pair. This calculator assumes the distance between the two reference planes to be an equal distance. "An Improved Transmission Line Calculator" appeared in the January 1944 issue. This online microstrip impedance calculator calculates the characteristic impedance of the microstrip (Ω), W/H ratio, and effective dielectric constant (εe) by entering the value of dielectric material relative permittivity (εr),. Users need only specify the material. It is defined as the ratio of the standing wave amplitude measured at maxima and minima along a transmission line. Sonnet. For example, if you wish to input "25000000", just type "25M" instead. Quarter Wave Transformer Impedance Calculator. 2 is pivoted at the center of the calculator. Bailey and A. Velocity of propagation (U) & sinusoidal frequency (f) are the key elements of this calculation. Rayleigh lines), the use of an array of equal inductors and capacitors are used to approximate a transmission line with discrete elements. In this section, zo is calculated for four common transmission lines — coaxial, twin-lead, parallel plate, and microstrip. For MLTLs, there are three fundamental choices: Tapered with narrow top, straight pipe, or tapered with wide top. Quarter-wave impedance transformer placed between a transmission line with impedance Z0 and load with impedance ZL. Calculate the Transmission Line impedance Z0 for a large variety of mechanical structures. A transmission line enclosure is a waveguide in which the structure shifts the phase of the driver's rear output by at least 90°, thereby reinforcing the frequencies near the driver's Fs. 1 3. Wadell) - not all calculators do. These. Usually, a transmission line is lossless or has very low loss, and for most practical purpose, = j . Pasternack's Circular Waveguide Calculator will calculate the cutoff frequency for the device from its radius. A Transmission line calculator, Version 0. You need to enter the substrate parameters (dielectric constant and height), the frequency of interest, and the physical parameters (width and length) of the microstrip line. some wire and b. The poor transmission line loss calculators are reinforced by articles that contain bad measurements, like a 2009 article on ladder line loss. A calculator is an online tool used to determine the sag and tension in overhead transmission lines. C — Capacitance per unit length 9. 765-kV transmission line with aluminum guyed-V towers (Courtesy of American Electric Power Company) 4 TRANSMISSION LINE PARAMETERS I n this chapter, we discuss the four basic transmission-line parameters: series resistance, series inductance. Access Rogers' calculators, literature, technical papers and request samples on your smart phone or tablet through the ROG mobile app. Corum, K1AON. This calculator is designed to determine the magnitude of the crosstalk on a stripline if its dimensions and source voltage is provided. Tapered Quarter-Wave Tube. Transmission line v1 1 0 ac 1 sin rsource 1 2 75 t1 2 0 3 0 z0=75 td=1u rload 3 0 999meg . In their simplest form (e. **Note: Like our microstrip line impedance. Assuming that the transmission line is a uniform dielectric material and the dielectric constant is εr, then C and Vp are:. Critical length is longer when the impedance deviation is larger. 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). Click the "Calculate" button to show the calculated transmission line parameters. Highly recommended. The calculator involves this page and a results page which are written in php and include some java scripting. But there's an even easier Method B. transmission line model. Most RF Coaxial Cables have an impedance of 50 ohms or 75 ohms. Of course this is not unique to transmission lines; the dip is also an issue for tapped horns and back loaded horns. This is read from the point where the circle you drew intersects the Re{ Z N} = 1 circle. 159 m$$ Thanks and sorry for my lack of English in Electrical Engineering subject. The transmission line parameter calculator is a tool designated to compute characteristic line parameters give the type of the conductor and the configuration of a three-phase. W W = trace width. When you make a ninety degree bend in a transmission line you add a small amount of capacitance. New parameters have been added and accuracy has been improved. Suggested Products. Two conductors can create a transmission line. Wire Over Plane. Thus, for this system, VSWR = 1:1 (i. The most common example of a loudspeaker that relies on a quarter wavelength acoustic standing wave is a transmission line enclosure. View All Tools. Home. Example Problem Find the SWR of the transmission line or wave guide whose load. The diagram below shows how to implement a quarter-wave line for impedance matching between a transmission line and a real load impedance. Microstrip line LINKS. W. 1, makes the argument that a circuit with resistors, inductors, and capacitors is a good model for a transmission line. I need your valuable prescription. Ω/mΩ/in. You can experiment with changes to the line parameters (Nominal Zo, Nominal VF, loss coefficients K0/K1/K2) to see how the. The delay between a network that uses a satellite will take hundreds of milliseconds, as the signal has to travel from Earth to. Where: Z0 Z 0 = characteristic impedance of the asymmetric stripline in ohms (Ω). Simpler calculators will use the less-accurate IPC-2141 equations. The twisted pair helps create a more. To use this tool, enter the values for. To use this calculator, simply input your microstrip geometry and Dk value, and the tool will return the differential impedance value for a pair of microstrip traces. Any transmission line that is not load terminated into its characteristic impedance has a variable impedance all along the line. substitute the values in the above formula. An online transmission line calculator is a web-based tool that allows users to calculate various parameters associated with transmission lines. Under Definition methods. At Antenova, we recommend using our new free impedance matching calculator as it enables designers to quickly calculate the optimum dimensions of their transmission line to ensure. 5 reflection coefficient: VSWR = (1. One of the most common types of transmission line, coaxial cable. The. to NF. Altium Designer Has the Best Impedance Calculator. 2". The same diagram and procedure can be used to terminate a. Online calculators will generally use Wadell's equations to determine the transmission line impedance numerically. . = √ (25 x 10 -3 /15 x 10 -4) Z0 = 4. The following steps outline how to calculate the characteristic impedance (Z0) for a Transmission Line using the given formula: First, determine the values of R, w, L, G, and C. A BASE = Base Amps. An online transmission line calculator is a web-based tool that allows users to calculate various parameters associated with transmission lines. 2: A broadband RF balun as coupled lines wound around a ferrite core: (a) physical realization (the wires 1– 2 and 3– 4 form a single transmission line); (b) equivalent circuit using a wire-wound transformer (the number of primary and secondary windings are equal); and (c) packaged as a module (Model TM1-9 with a. The Differential microstrip impedance calculator is used to compute the differential (Zd) and single-ended impedance (Zo) of an edge-coupled microstrip line just by entering the width, separation and thickness of the trace along with the dielectric thickness and constant of the coupled line. Frequency. These calculators will be useful for everyone and save time with the complex procedure involved to obtain the calculation results. = 2π/15 x 10 3. A signal’s wavelength is the physical distance it will propagate in the timespan of one period. LPARA, an existing software at The Trinidad and Tobago Electricity Commission (T&TEC), has been. Lossless transmission lines can be modeled by distributed capacitance and inductance:The relation between the R, Zo, and amount of power division is given by the following formula. The PCB designer matched the width of this cutout to the width of the coplanar ground relief on layer 1 so that the cutout in the layer 2 plane was 30 mils in width as. This tool can calculate several critical parameters like unit length that describe your traces for different arrangements, including microstrips, embedded. Abstract. If the voltage and current to the motor are 400 V and 8. There are some advantages to using a. Dielectric Constant ε r Propagation speed (cm/nsec) Delay time per unit length (ps/cm) Polyimide 2. Antenna Downtilt Angle Calculator. 1t for W/h ≤ 1 and Wr = W + 1. Set Parameters as Desired. For example, if you wish to input "25000000", just type "25M" instead. Set Parameters as Desired. 5. For an ideal system, reflected power is zero, so return loss is infinity (∞). But, for a practical system. Excel 7. David Kirkby (G8WRB), who works at the department of Medical Physics, University College London. The same diagram and procedure can be used to terminate a drive and a load with different. This is a calculator for designing a Dual Fold On-Axis Transmission Line Enclosure. It allows calculation of basic parameters like strip width, spacing etc. The relative permittivity of the medium ϵr ≈ 1 ϵ r ≈ 1 for the. Since the argument of the complex exponential factors is 2βl, the frequency. The effect of a short discontinuity in transmission line characteristic impedance. 6 times Z 0 . It is suitable for the production of flat structure transmission lines of microwave integrated circuits. Overview: This is a calculator for designing a Single Fold Off-Axis Transmission Line Enclosure. Pi-Matching Impedance Network Calculator. TQWT can't be seen only as a combination either helmholtz resonator or TL. What the utility companies deal in are 50 or 60 Hz power transmission lines, and at these frequencies characteristic impedances. This online microstrip impedance calculator calculates the characteristic impedance of the microstrip (Ω), W/H ratio, and effective dielectric constant (εe) by entering the value of dielectric material relative permittivity (εr), the width of the copper trace (W), and dielectric height (H). Understanding coax can be helpful when working with it. AWR has one of the nicer free transmission line loss calculator apps I have seen in a long time. Return Loss. Formula to find β = 2π/λ. TLDetails includes a plot function that allows you to plot the matched line loss, the true velocity factor, or the true characteristic impedance magnitude, over a frequency range of either 0. ) A description of the. Frequency span ±. Get up-to-date information on products and solutions by opting in to receive emails from us. Modeling approximation can be used to understand the impedance of. The ratio of the reflected voltage to the incident. This page is published by Mike Banz, AA3RL as a service to the Amateur Radio community. Oregon State University ECE391– Transmission Lines Spring Term 2014 Propagation Speeds for Typical Dielectrics Dielectric Rel. Our waveguides are low loss transmission lines capable of handling high power with high isolation. While this calculator will provide a baseline, any final design considerations should be made towards loss, dispersion, copper roughness, phase shift, etc. Use our free online app Characteristic Impedance of a Transmission Line Calculator to determine all important calculations with parameters and constants. As we know that the definition of the return loss of a system is the ratio of incident power to reflected power. It supports both balanced and unbalanced lines. Therefore, for distribution lines and most transmission lines, the mi dspan span conductor sag is approximated by the first term of the above equation. Home; Site MapInductance of Symmetrical Three Phase Transmission Line Calculator; Line of Sight Transmission Calculator; Ruling Span of transmission line Calculator; Sag of Transmission Line with supports at different heights Calculator; Sag of Transmission Line with supports at same height Calculator; Tension in Transmission line. Get up-to-date information on products and solutions by opting in to receive emails from us. Calculate the Displacement Volume for Your Driver. Calculate the Transmission Line impedance Z0 for a large variety of mechanical structures. The PowerWorld Transmission Line Parameter Calculator (TransLineCalc) is a tool designed to compute characteristic line parameters given the type of conductor and the. School of Engineering 6. February 5, 2012 by Rolf Ostergaard. This can be set to zero, but the calculated loss will not include conductor losses. Online Transmission Line Calculators. The development of transmission line theory is presented in Section 3. 0, this program is unique in. Fig. Transmission Line parameter calculator tool. g. With Antenova’s free Transmission Line Calculator it is possible to calculate the optimum dimensions of your transmission line to achieve maximum efficiency, with complete accuracy, in just a few seconds. These are precisely the characteristics of a pair of lines to be designated as a differential pair. Then add the transmission line and note the new "Slice Max Gain". The nice part about coax is that it can be bent and flexible unlike most pcb transmission lines. The magnitude of the coupled voltage between adjacent traces is also provided. This calculator can also be used for measuring coaxial cable and will then give Relative Dielectric Constant rather than Effective Dielectric Constant. When in doubt, use 1 for copper, . Adding a Transmission Line. This is a required field. Pulse Forming Networks (PFNs) are used to generate output pulses which approximate a square wave shape. A pair of lines can be modeled as follows: Differential pair line. 0 spreadsheet format, (~10K zip file). Transmission lines tend to be larger than ported enclosures of approximately comparable performance, due to the size and length. Many methods exist to achieve the desired selectivity. The Smith chart is essentially a graphical calculator for solving transmission line problems. Find the transmission or propagation parameter of the transmission line or wave guide whose wavelenggh λ = 15 x 10 3. This is a calculator for designing a Dual Fold On-Axis Transmission Line Enclosure. = 10000 x (7000/ (2000 + 7000)) Vterm = 7. Satellite Look Angle Calculator. Chemandy Electronics. 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. atlc. Formulas. Then, simplify the expression inside the square root. 50 Ohms. The formula is: Line Loss (dB) = 10 * log10(Pin / Pout) Where Pin is the input power and Pout is the output power. In addition to the characteristic impedance of a transmission line, the tool also calculates. Transmission lines Transmission line concepts and an online transmission line calculator by Owen Duffy, VK1OD. zo depends upon the geometry and the material of the transmission line. The substrate parameters (ε r and h) are required. Let's look at a few 40-meter horizontal loops with an open circuit loop as a reference, and compare it to others loaded by a 1/4 wave transmission line stub. In the calculator you can choose different sorts of Line Types and their special parameters. The first section, Section 3. INPUT DATA. Also please provide clear definition of all. High mismatch loss means high reflected power, so. The Pasternack wavelength calculator Transverse Electromagnetic Mode (TEM) allows you to determine the wavelength (in millimeters) inside a rectangular waveguide. Access technical papers, white papers, calculators, tools and more for circuit laminates, prepreg and bonding materials. R oundopenwire Lecherline ,ladderorwindo wline and twin‑lead line are all balanced tr ansmission lines which are frequentl y en-Transmission line wavelength (λ) calculator - step by step calculation, formula & solved example problem to find the wavelength of the lossless transmission line. To make an effect transmission line with two wires it is best to create a twisted pair. The source resistance is 200ohms. Visit page. The wires are encased in plastic ribbon of polyethylene which is strong and flexible. The formulas used in the calculator create a design that suggests the most maximally flat response in an anechoic environment based on the number of drivers, the thiele small parameters and the allotted dimensions specified in the user’s input fields. A twisted-pair cable is simply two wires that are twisted together so as to reduce radiated EMI (electromagnetic interference) and mitigate the effects of received EMI. The user only needs to enter the attenuation in decibels (dB) and the given characteristic impedance of the transmission lines to be matched. 1. In electrical engineering, the reflection coefficient is a parameter that defines how much of the electromagnetic wave is reflected due to the impedance discontinuity in a transmission path. Next, substitute the values into the formula: Z0 = sqrt ( (R + jwL) / (G + jwC)). A calculator of this type has been constructed to facilitate the solution of transmission -line problems, and is shown in Fig. In this case a rectangular form is used. This technique doesn’t work for wide band requirements, but is a simple way to achieve this at a specific. Also find other calculators for impedance, Smith chart,. Feb 04, 2015. Common Potentiometer 18 Jun 2020 14746. 2, and Section 2. These radio frequency calculators help with unit conversion, attenuator design, antenna design, radars, and various other basic calculators. This form of microstrip is composed of two traces. 1. The calculator produces more accurate results than the IPC formulas for impedance because it implements a more accurate model that is not based on a limited dataset. Once these decisions are made, a designer needs to determine the PCB trace width required to hit their required PCB transmission line impedance. real power, reactive power, and current flow in each transmission line and transformer. Topics include transmission lines, waveguides, two-port microwave circuits, matching, tuning, resonators, dividers, and directional couplers. Kenneth L. Create an equation-based transmission line 50 cm in length. Simpler calculators will use the less-accurate IPC-2141 equations. Transmission Line Calculator. The microstrip is a very simple yet useful way to create a transmission line with a PCB. This tool calculates the impedance, propagation delay, inductance and capacitance of a twisted pair transmission line with two conductors. Active calculator for microstrip transmission line using equations quoted by Rick Hartley giving characteristic impedance and effective dielectric constant, with equations used. D D = coaxial cable outer diameter. To conduct the correct three-phase power calculation to the problem given above: Identify the given parameters — active power = 5 kW, phase voltage = 400 V and line current = 8. Following is the list of useful converters and calculators. often called a wave guide transmission line. The generalized lumped-element model of a transmission line can be used to calculate characteristic impedance, phase velocity, and both parts of the propagation constant (phase and attenuation). Select the method of measurement. Transm. Transmission line calculators. The characteristic impedance (Z o) of coplanar waveguide with ground or microstrip lines with signal side ground plane can be calculated using the active calculator or the equations at the bottom of the page. The parameters computed are the resistance R, reactance X, susceptance B, and conductance G. The dimensions of some of the. The actual input impedance to the terminated line isImpedance Calculation. 2. Using the Microwaves101 microstrip calculator, we see that 50 ohms on 10 mil alumina corresponds to 9. This is the second edition of Electronic Applications of the Smith Chart, written by Phillip H. With PCBWay impedance calculator, you can calculate the approximate impedance of your PCB / high frequency circuit board.