Microstrip Traces and Controlled Impedance. You can also specify the substrate and the characteristic impedance, and have Linecalc determine theThe calculated impedance was 36. Just to give designers a starting point, take a look at these differential impedance calculators you can use to get an initial estimate of the differential impedance for microstrips and striplines. Click here to see the user guide of our. Modified 1 year, 4 months ago. 1 er 15 Note that 1. The websites associated with hits 2-5 all calculate the microstrip impedance for this stackup to be 50. 1. Log-Log Graph Paper (PDF Download) Semi-Log Graph Paper (PDF Download) Smith. Differential Microstrip Impedance Calculators Giving Conflicting Answers. The calculator then uses a formula to calculate the width and spacing of the trace or transmission line required to achieve the desired characteristic impedance. Simons, "Coplanar Waveguide Circuits, Components, and Systems", Wiley. This tool will help you create a matching circuit so that optimal power transfer occurs between unmatched loads. The Calculator has the following tools: Regulators. A certain microstrip line has fused quartz (ϵr = 3. Rectangle Loop Inductance Calculator. • Animating the field plot. even if i calculate in these deviations from standard i still dont get the same results as the web calculator and calculations by the standard are different from web calulator results as well. One of the features of this type of microstrip is the coupling between lines. Impedance in Ohms. Where a Microstrip Line Calculator Fails. Microstrip Patch Antenna Calculator Calculate dimensions and edge impedance for desired resonant frequency. Then Rock'n'Roll. The impedance Z 0 of a transmission line consisting of a circular signal conductor having a diameter d and centered between parallel ground planes separated by a distance h is given by: Eq. Values for L and C will be calculated for the four. The IPC-2141 trace Impedance calculator will help make initial design easier by allowing the user to input basic parameters and get a calculated impedance according to the IPC-2141 standard. Γn is the reflection coefficient. 1, the top (visible) traces comprise one conductor, whereas the ground plane (underneath, so not. For typical PCB parameters (ε r = 4, H 1 = 61. 37mm for a 50 ohm. A. 5 mils (241 microns). Visit to learn more about our other electrical engineering tools and resources. Take note that this assumes that the distance between the conductor and the planes is not the same for both reference planes; hence the asymmetric term. 7. The websites associated with hits 2-5 all calculate the microstrip impedance for this stackup to be 50. Microstrip Mitred Bend Calculator. The microstrip line is mainly based on transverse electromagnetic waves. Atwater, “Simplified Design Equations for Microstrip Line Parameters”, Microwave Journal, pp. If the ratio (L/W) is close to unity, the radiation pattern will be symmetric but may not provide a resonable input impedance. Microstrip Impedance. 8. This tool is designed to calculate the resistance of a microstrip trace with a copper conductor. 5 resin). This calculator is designed to calculate the characteristic impedance of an edge coupled stripline. Incidentally, the trace thickness parameter does have a significant effect. Where: Z 0 is the characteristic impedance of the microstrip; ε r is the relative permittivity (dielectric constant) of the substrate material; h is the height of the microstrip above the ground plane; W is the width of the microstrip trace; By knowing the values of the dielectric constant, height, and width, you can use this formula to calculate the characteristic. This calculator requires symmetry in the trace widths and location between plane layers. As you route traces on a real board, they can couple to other traces and conductors capacitively or inductively. 4. Radar Calculators. The Smith Chart achieves this by superimposing a grid on S11 that maps load impedance. I have only Saturn PCB SW to make some calculations. Be aware that there are many microstrip impedance calculators on the Internet that give sometimes widely varying results. The microstrip patch antenna calculator determines the length (L) and width (W) of a rectangular microstrip patch antenna for a given resonant frequency or vice versa. If the dielectric constant of the material is not known, you can choose to put in the velocity of. All About Circuits is the largest online electrical engineering communities in the world with over 700K engineers, who collaborate every day to innovate, design, and create. The app has seven calculators for Microstrip, Embedded Microstrip, Differential Microstrip, Stripline, Asymmetric Stripline, Differential Stripline, and Dual Stripline. Introduction . 76mm Rogers4350B substrate at a certain frequency and with 35 micron copper thickness, line width becomes 0. It is a ribbon wire (signal line), separated from the ground plane by a dielectric. Following is the list of useful converters and calculators. Just as a sanity check, we can quickly calculate the total inductance of a trace determined with this method and compare it with typical values. The microstrip calculator determines the width and length of a microstrip line for a given characteristic impedance (Zo) and electrical length or vice versa. 4mil and the dielectric thickness to the first intermediate layer (this is a 4-layer board) is 6. 2. The MWI-2017 Microwave Impedance Calculator software is able to calculate key parameters for most common microwave transmission lines, including microstrip, stripline, and coplanar-waveguide transmission lines. 36) Co Equation: IPC-D-317A (Eq. This transmission line calculator was. 02 m Slotline Equation. Calculate the Differential Microstrip Impedance of a transmission line based on the the distance between the strips, height of the substrate, trace thickness and dielectric constant of the substrate. Differential Impedance Calculator. Relative Dielectric Constant ( εr ): Track Width (S): mm. Height: Height of the substrate. A great example is the surface microstrip which forms on the outer layers of the PCB. The accuracy of the equations was observed to be slightly better for higher permittivities. In addition to the suite of free design, verification, and analysis tools shown below, EEWeb is the home for experienced and novice designers alike to share tips and to ask and answer questions via our forums. The characteristic impedance is given by: Eq. Impedance calculation. dBm to Watt converter Stripline Impedance calculator Microstrip line impedance Noise temp. Such a stripline is constructed with two traces referenced to the same reference planes above and below the traces with a dielectric material between them. This calculator assumes that you already have the value for Zo. Scientific Calculator. 11. Calculates the resistance, inductance and capacitance per unit length of common low-loss transmission line configurations. Microstrips (Source: Max Maxfield) In order to fine-tune the transmission line properties of the microstrip, we need to calculate the impedance of the trace. Wr is a correction factor defined as Wr = W + 1. If, in addition to a differential impedance (Z Diff), you also need a defined Z 0, proceed as follows:. Procedure: • We know the standard characteristics impedance of microstrip line to be of 50Ω. 3. Stripline Impedance Calculator. 0 (FR-4), it turns out that when W/H is 2/1, the resulting impedance will be close to 50 Ω (as in the first example, with W = 20 mils). Noise Conversion Calculator. Typical thickness of an LPI mask over the traces is . dBm to Watt converter Stripline Impedance calculator Microstrip line impedance Antenna G/T Noise temp. com Microstrip Impedance Calculator. Note: The results are only for approximation and rough estimation, the final values and the. Agilent's LineCalc tool calculates Z odd = 50. A microstrip patch antenna is one of the most popular microwave antennas. H1 (Dielectric thickness) : Just to give designers a starting point, take a look at these differential impedance calculators you can use to get an initial estimate of the differential impedance for microstrips and striplines. Some systems use 75 Ω; this latter value is more appropriate for high-speed digital signals. **Note: Like our stripline impedance calculator, all of our RF calculators allow SI prefix input. Figure 7. 6 , Frequency(GHz) = 10 OUTPUTS: Effective dielectric constant = 2. The substrate parameters (ε r and h) and the frequency of interest are required. The calculator allows you to make an approximate calculation of the characteristic impedance of a microstrip transmission line, provided that the line operates at a frequency below the critical one. 1. If you need to find and use an efficient and accurate microstrip impedance calculator that provides lossless impedance values, you can use our free tool below. In order to obtain the maximum energy transmission, the microstrip line needs to achieve impedance matching with both ends. *Accurate for arbitrary values of Er and w/h ratios. The input impedance, Zin, of the shorted microstrip line is shown in Figure 3. Within. Microstrip patch antenna input impedance in the fundamental mode (i, j, k) = (1, 0, 0). In Figure 3. A microstrip width calculator can calculate the width of a microstrip. microstrip line are assumed to be quasi-TEM, and dispersion along the microstrip line is taken into account using the empirical formulas given in Appendix C. Modeling approximation can be used to understand the impedance of. Stripline Trace. What is a Microstrip Impedance Calculator? This is a calculator used for determining the characteristic impedance of a microstrip. Controlled differential impedance starts with characteristic impedance. Following equation or formula is used for Microstrip Mitred Bend Calculator. 31. The characteristic impedance (Z o) of a microstrip transmission line can be calculated using the active calculator or the equations at the bottom of the page. All transmission lines are 1 ounce thick (1. 3. Description. eu. 5. z0_f = getZ0 (txline,freq) returns the characteristic impedance with dispersion for a transmission line at the specified frequency. With this PCB impedance calculator, you can calculate the microstrip controlled impedance or the impedance of a variety of conductors in a printed circuit board. 2. They will give very similar answers. Reset. 4, loss tangent =. g. This microstrip impedance calculator gives you a good start for estimating the trace width and PCB dielectric thickness that will produce a target impedance value. 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. The variation in impedance of microstrip with frequency is at least partly (I think mainly) due to the wave in microstrip not being TEM. They consist of a conductor fabricated on the dielectric substrate of permittivity ‘𝜀r’ with a grounded plane. Increasing W decreases Zo. Overview. This allows you to double check the calculator and make sure that it selected appropriate values, by making sure the impedance correctly matches the input impedance. Traces in printed circuit boards can often form broadside or edge pairs and may introduce unwanted inductance. 5. Z 0 now meets your requirements. T-Match Topology. The impedance bandwidth of the antenna is 2. HFSS Waveport Size Calculator Figure out the correct waveport size to use in HFSS for a microstrip line feed. The substrate parameters. JLCPCB Impedance Calculator. PCB Impedance-Calculation: Help with the dimensioning of the impedances of your circuit board. 3 will accurately capture the dependence of Z0 on the parameters ϵr and h / W. The complex characteristic impedance is given by the equation: Z 0 = R 0 + j X 0. Include both the pcb dielectric thickness as well as the wire insulation in the height calculation. Some of them include Microstrip, Stripline and Coplanar Waveguide. 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. Microstrip Trace Impedance Calculator; Stripline Trace. Coplanar Waveguide Calculator. Backwards crosstalk creates a pulse width that is twice that of the propagation time of the pulse traveling the coupling distance. Input the parameter of the circuit board and center frequency. For example, if u = 1 and ε r = 10, then from the figure, Z 0 ε e = 126 Ω and ε e / ε r = 0. Since the line length is given as a fraction of wavelength, λ=1 (screen 18). dBm to Watt converter Stripline Impedance calculator Microstrip line impedance Antenna G/T Noise temp. The IPC Formulas and Wadell’s Method. icrostrip line: H. 1: Impedance-matching using a quarter-wavelength transmission line. 6 ohms. The stepped-impedance lowpass microstrip filters, which use a cascaded structure of alternating high- and lowimpedance transmission lines. The surface finish is neglected. To calculate this, you need some values. "Controlled impedance from the fabricators view", Rick Norfolk, p. It supports both balanced and unbalanced lines. If you leave the relative permittivity Er blank, a default microstrip dimension will be used, and. Result. Multiply the result by the square root of the ratio of (1 + (2 * h / w)) to (1 – (2 * h / w)). 50Ω. 4. Line Thickness (T) in mils. Result: Microstrip Patch Antennas (or simply patch antenna) are increasingly useful because the antenna is printed directly onto a circuit board. Equation Source: Ulaby "Fundamentals of Applied. Perhaps the most common type of transmission line is the coax. • Viewing of results for S-parameters, characteristics impedance (𝑍0), and Total loss for the entire frequency spectrum. The image below shows the calculated real part of the characteristic impedance of a microstrip and stripline on FR4 (Dk = 4. Where: Z 0 is the characteristic impedance of the microstrip; ε r is the relative permittivity (dielectric constant) of the substrate material; h is the height of the microstrip above the. Input impedance (Ohms) Desired output impedance (Ohms) Note: This transformer cable should be electrically one quarter wavelength, or a multiple of an odd quarterwavelength. We recommend the software from Polar Instruments if you want to get exact impedance calculation. amplifiers and other active components. 1 W/H 3. Cross-hatched copper plane in a flex stack-up for controlled impedance. Values for L and C will be calculated for the four. [1] This paper constructs a simple formula of distribute conductance of a microstrip line and then of the dielectric attenuation with only one arbitrary constant, p = 1. Dimensional units: mm mils Zo (single ended impedance, Ohms) = d (trace separation) = h (dielectric thickness) = Zd (Impedance, Ohms) =Calculate Microstrip impedance for given PCB parameters. 1 to 3. 1mm FR4 in between yealds about 50 ohms. For example, to pick one at random: Edit: this calculator may not be accurate, check the one suggested below. Both formulas of the dielectric, as well as the total losses, agree. 71. This is a required field. A helpful tool for calculating the impedance of a wire microstrip. Microstrip lines have three parameters that we can change to achieve 50 ohm impedance: Due to design constraints, there is only one parameter (track width,) left to achieve 50 ohm. At low frequencies near 0 GHz, the input impedance is inductive since. To use the calculator, place values in either the velocity of propagation field or the dielectric constant field. 1. might have been the test equipment calibration, impedance mismatch amongst the measurement system’s cables and adapters, or trace impedance errors resulting from structural defects in the etched microstrip lines. For example, with microstrip, you can specify the substrate parameters (primarily thickness and dielectric constant) and use Linecalc to calculate the impedance for a given line width; this is the “analysis” mode. Impedance in your traces becomes a critical parameter to consider during stackup. example. The effective dielectric constant drives the length of the taper, this effect was not. 6. Microstrip impedance calculator Mixer spur calculator mmWave Link Budget calculator Noise Figure/Temp converter Optimal Mitre calculator Path loss calculator. 035mm and Er = 4. This limits the use of ƛ/4 microstrip stepped-impedance resonators in low-frequency filter applications. Enter values for W and L for a microstrip line to determine its Zo and Electrical Length. We are now ready to calculate the microstrip characteristics. RF calculations and RF conversions include metric. Also, take into consideration the board's dielectric thickness and. These equations are. 3 is a plot of impedance versus trace width for the three most common types of transmission lines in PCBs-- surface microstrip (SMS), buried microstrip (BMS) and centered stripline (CSL). In this measurement, a voltage source is used to excite Port 1 and the received signal at. For example, if u = 1 and ε r = 10, then from the figure, Z 0 ε e = 126 Ω and ε e / ε r = 0. MICROSTRIP WIDTH CALCULATOR. The electrical parameters may be determined from specified physical parameters, or the physical parameters required to meet a given set of electrical parameters may be found. 2 Effective Permittivity and Characteristic Impedance; 4. Microstrip line impedance calculators are useful to some extent, but they have some of their downsides, so it is very necessary to use some up-to-date modern tools for calculations. 6. We know that ZL in this case is 50 ohms, due to the. Characteristic impedance is purely a function of the capacitance and. Differential Impedance of Microstrip. This calculator is designed to calculate the characteristic impedance of a microstrip - a flat conductor suspended over a ground plane with a dielectric between them (see diagram below). Embedded Microstrip Impedance Calculator. The default units for all given values, except the subtrate. Circuit designers classify power loss in microstrip lines into conductor loss, dielectric loss, and radiation loss. This calculator determines the impedance of a symmetric differential stripline pair. 8. 48 e-0. *Comparisons show minimal differences to ADS linecalc and Polar Instruments Quicksolver industry standard tools. 6. The dielectric material and the air above the microstrip makes it a transmission line with the inhomogenous dielectric. To use this tool, enter the values for. Each of the transmission lines consists of a signal trace and a reference plane(s). Click the button corresponding to the unknown parameter to calculate its value ( 0. In both cases, you’ll need to enter your stackup information into the calculator to get accurate results. Microstrip Impedance Calculator Enter the Height, Width and Permittivity to get the Impedance of the Microstrip Note : The unit of the height and width entered must be the same. 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. Patch antenna online calculator. An asymmetric stripline is constructed between two plane layers, where the distance above the trace is not equal to the distance below. A quarter wave transformer is used to match two transmission lines with different impedances. Can anyone explain this discrepancy? 1. This assumes ~0 trace thickness. Antenna Calculators. This can be set to zero, but the calculated loss will not include conductor losses. Matching T Attenuator A two part calculator which gives ideal and preferred value resistors, showing most formulas used and a link to the others. LC Impedance matching network designer Enter the input and output impedances to be matched and the centre frequency. Differential Impedance of. Characteristic Impedance and Calculation Formula of Microstrip Antenna . The calculator produces more accurate results than the IPC formulas for impedance because it implements a more. The microstrip line is a printed wire separated by a dielectric on the ground layer. trace width. 60. Microstrip. The calculator below uses Wadell’s. The characteristic impedance (Z 0) of a transmission line is the resistance it would exhibit if it were infinite in length. A microstrip is a type of transmission line in which a strip of a conducting material like copper is mounted on a dielectric material and routed to a ground plane. g. The original source of formula is IPC-2141: Controlled Impedance Circuit Boards and High-Speed Logic Design, April 1996. This calculator determines the impedance of a symmetric differential stripline pair. This transmission line calculator. I have a question. This calculator is heavilly based on . 3 ohms but I believe it should be 50. Relative Permittivity (input1) : Height of substrate (input2) : Width of line. The trace resistance of a microstrip is important in determining how much power it dissipates. 13 from Pozar [1] in which a single-section quarter-wavelength transformer is designed to match a 350 Ohms load to a 100 Ohms microstrip transmission line at an. Input parameters. Use this user-friendly online calculator to calculate the impedance, capacitance, propagation delay, and inductance of a Microstrip Line on a Printed Circuit Board (PCB). The substrate parameters (ε r and h) are required. Useful converters and calculators. 1 of the Microstrip Calculator using H2 in place of h, εr,eff can be computed as specified in Eq. Select a configuration: Microstrip Trace. The tools from Cadence can help designers create, simulate, and analyze microstrip. This tool will also compute the resistance of the microstrip, the voltage drop, and the power. **Note: Like our stripline impedance calculator, all of our RF calculators allow SI prefix input. A matching network optimizes the transfer of power from a source to a load by maximizing the power delivered to the load while meeting other performance specifications. 5, determine. (2) When the line width (w) of the characteristic impedance (Zo) is calculated. Coplanar wave guide. Compared to waveguides, microstrip is generally has a lower power handling capacity, and higher losses due to the fact that it is not enclosed. 8. Microstrip Width Formula or Equation. Just enter the given values for trace thickness, substrate heights, trace width and subtrate dielectric in the calculator above and press the "calculate. microstrip = microstripLine creates a default microstrip transmission line using a Teflon substrate. Microstrip Mitred Bend Formula or Equation. 19. Reset. 0; 1 < εr < 15 ) Select the units for all dimensions: mm mils. PCB Structures / Discrete Structures / Signal Management. Edge Coupled Microstrip Impedance Calculator This tool helps calculate the impedance of an edge-coupled microstrip. This page of converters and calculators section covers microstrip line impedance calculator. 1 W/H 3. The quality of an impedance match can be expressed mathematically by the reflection coefficient (Γ). Description. From impedance matching theory, you can calculate the characteristic impedance of a quarter wave transformer, by this equation: Zc = sqrt (Zo*ZL) Where Zc is the characteristic impedance of the quarter wavelength line, ZL is the load impedance and Zo is the impedance you are matching to. Rho: Conductor resistivity relative to copper. To use the calculator, place values in either the velocity of propagation field or the dielectric constant field. Z = R + jX, where j is the imaginary component:. Calculate Microstrip impedance for given PCB parameters. Provide values for three of the four parameters h, t, w, Z 0 and the relative permittivity of the dielectric. Resistance Tables. *Comparisons show minimal differences to ADS linecalc and Polar Instruments Quicksolver industry standard tools. transmission line types. The simplified test bench setup shown in the above figure is used to measure the cross talk between two microstrip lines on a grounded substrate. 6 mils line width, and the effective dielectric constant is 6. Press Analyze to see the results. ε R. Calculates the characteristic impedance and per-unit-length parameters. 0 6 / 15 2011-04-28 2. 0 2. The impedance Z 0 of a transmission line consisting of a circular signal conductor having a diameter d and centered between parallel ground planes separated by a distance h is given by: Eq. There is a dielectric material between them. The Calculator assumes that 1. The resulting model is said to be a good model if it has the following characteristics [1]: •It can be used to calculate all impedance and radiation characteristics of the antenna under discussion. These are considered to be standardized impedance values with cables readily available. 37) If H1<1. In most practical cases, the dielectric substrate is electrically thin, that is, (h ≪lambda). Microstrip Calculator computes a microstrip's height/width ratio, impedance and relative dielectric constant for a microstrip transmission line. We use our online calculator to effortlessly compute the impedance, capacitance, propagation delay, and inductance of a microstrip line on a PCB. Stripline. This calculator provides accurate microstrip transmission line analysis and synthesis. To start, select the type of PCB conductor, fill in the geometric measurements of your circuit board, and it will automatically give you the relevant. where R0 and X0 are the real and. *Solder resist PCB coating will have the effect of lowering the impedance (due to the 30um or so of Er 3. Z diff = 2* Z o (1 - 0. Consider a transmission line of length L terminated by load impedance of ZL. I have been fiddling around with GPS antenna trace impedance matching. Following is the list of useful converters and calculators. This calculator finds both odd and even transmission line impedance. SAVE & ACCEPT. The stripline impedance calculator provided below is useful for gaining an initial estimate of trace impedance for striplines. Increasing H increases Zo. Single-stub matching is a very common method for impedance matching using microstrip lines at frequences in the UHF band (300-3000 MHz) and above. Hits: 6158. Coplanar wave guide. The stepped impedance lowpass microstrip filters have a cascaded structure of alternating high- and low-impedance transmission lines. Design a stackup and use the calculator for some impedance calculator. Antenna Tutorial Antenna Gain vs Effective Area Types of antenna TV Antenna TV Antenna Booster Satellite Dish Antenna Mobile Antenna Antenna Installation Antenna Suppliers. dBm to Watt converter Stripline Impedance calculator Microstrip line impedance Antenna G/T Noise temp. The phase is mostly + 90 ∘ or − 90 ∘, indicating that Zin is mostly reactive. calculate the impedance and capacitance of PCB traces. Enter the Height, Width and Permittivity to get the Impedance of the Microstrip Note : The unit of the height and width entered must be the same. High-end calculators can rely on top-of-the-line systems to cover any computing speed deficiencies, but general impedance calculators must make a clear design tradeoff. Following equation or formula is used for Microstrip Width Calculator. Characteristic impedance calculator for a 4-layer board. 3. Instructions are below the calculator and don’t forget we can make and test your controlled impedance printed circuit board too. Relative Permittivity (input1) : Height of substrate (input2) : Width of line (input3) : Microstrip Line Impedance in Ohms (Output1): Effective Permittivity (Output2): EXAMPLE: Relative permittivity = 10. Checking Impedance in Your PCB Layout. Coil Inductance Calculator. Electromagnetic Compatibility Laboratory Microstrip Impedance Calculator Provide values for H, T, W and the relative permittivity of the dielectric and click the button. 5. To use these to design for a target impedance, simply cycle through various geometric values for the trace width until the calculator returns the target impedance. Note that the "h", for dielectric thickness in this formula is omitted in some other Polar publications. Patch antenna with a quarter-wavelength matching section. For budgetting reasons I'm tied to a stock pooling layer stackup, so I went for OSHpark's 4-layer stackup (35um copper - 0. A simple microstrip is located on the top of the board, while an embedded microstrip is located inside the board substrate as illustrated below. These losses are dependent on: The loss tangent or dissipation factor of the dielectric material. Embedded Microstrip Impedance Calculator. 19. Basic Calculator. since a number of factors can affect impedance. W is the Width of track. The next graph investigates this further. Reducing the Characteristic Impedance of Microstrip Lines. The Microstrip Impedance Calculator is an online tool designed to help engineers and technicians calculate the characteristic impedance of a microstrip transmission line. Instructions are below the calculator and don’t forget we can make and test your controlled impedance printed circuit boards too. Multiply the result by the square root of the ratio of (1 + (2 * h / w)) to (1 – (2 * h / w)). Attenuator Calculators. 32 is the equation we usually rely on for the impedance of a microstrip trace. The ratio of cross-hatch conductor width (HW) to cross-hatch pitch (HP) plays an important role while characterizing the cross-hatch plane. Embedded Microstrip Impedance Calculator Microstrip Impedance Calculator Dielectric Thickness (mils) C Dual Stripline Impedance Calculator Asymetric Stripline Impedance Calculator Zo Equation: IPC-D-317A (Eq. 8. Try This New Tool. Using online calculators, I figured out the width of the PCB trace to create an impedance of 50 Ohms is 2. Useful converters and calculators. Phone: +44 (0)1425 489 111 / +49 (0) 8104 628 0. This function calculates the line impedance and the phase velocity of a microstrip line. Overview. While looking for this information online I came across an article where a guy created a low cost electric field probe and a low cost magnetic field probe and then. Pi-Matching Impedance Network Calculator.