The CircuitCalculator. Just as a sanity check, we can quickly calculate the total inductance of a trace. KiCad’s PCB calculator does handle. In reality, the pcb manufacturer will adjust the widths to match the desired impedance, according to their internal data of the exact dielectric contants and widths that they will use to manufacture your pcb. This form of microstrip is composed of two traces. Cloose one. a 50 ohm impedance is often the required matching characteristic. It renders fairly accurate results suitable for use in circuit board manufacturing and engineering analysis. PCB Trace Width Calculator. A 50-ohm trace on a typical two-layer board is around 110 mils wide. Width, mils : EXAMPLE: Inputs: Relative dielectric permittivity = 3. 7 x 10-6 ohm-cm αcopper (temperature coefficient) = 3. So lets assume you want a 50 ohm impedance trace and you are using 1oz copper and have a standard 0. 1mm, so trace width can also go down: with Er=4. But to have some tolerance, we generally use 10-12 mil or 0. It proved very useful for me when I had to design a board with surface-mount power transistors on. my intention is to use PCB traces in place of a 50 ohm RF cable that is generally used in these kind of applications - RF chip. For 2 oz copper on an outer layer, a 275 mil wide trace will have a 10 degree C rise at 9A. Impedance in your traces becomes a critical parameter to consider during stackup design for high-speed PCBs, but the. 2mm * 5mm + 65mm) / 0. Probe with the oscilloscope where the function generator feeds into the PCB. PaulRB August 4, 2018, 6:51am 2. Blog. Activity points. It does not work. This page covers Microstrip Width Calculator. 1. PaulRB August 4, 2018, 6:51am 2. A PCB impedance calculator uses field solvers to accurately approximate impedance values. This can bea straight trace inverted F, -type trace,. Use PCB Trace Width Calculator to get helpful information like how wide your traces should be, the expected trace resistance, voltage and power loss and the temperature. I managed so far (using Altium) to setup profiles for a 50 Ω (GPS Antenna) and 90 Ω (USB 2. trace. This calculator says that if the plate is stood up on the long edge it will reach maybe 300C with 10W input, if the heat is well spread. 6. Antenna Impedance (Z (Antenna)) Ohms. Convert psi to bar, kgf/cm2 to psi, bar to kgf/cm2, and other units like pa, mmH2O, inches. 1). At higher frequencies, the PCB signal trace impedance will depend on the geometry of the circuit, so it has to be calculated. I need a Z0 of 50 ohms. Reference: R. Phone: +44 (0)1425 489 111 / +49 (0) 8104 628 0. The Layer Stack Manager's impedance calculator uses the Wideband Debye model, with a default frequency value of 1 GHz. 05 ohms, using Power = I * I * R, you need 1watt/0. And don’t worry about not getting precisely 50. While commonly constructed using printed circuit boards, this structure can also be built using other materials as long as there is a conductor separated from. And as the PCB circuit complexity increases. Ρ = Copper resistively in ohm-inch W = Trace width in inches (example: a 5-mil ie. You will need accurate models for the input impedance of the load and the output impedance of the source. It mentions formula or equations used in this Microstrip Width Calculator. In both cases, you’ll need to enter your stackup information into the calculator to get accurate results. For the other points, the reflections are a result of impedance mismatching. 2A, about 15W. 44, c = 0. Optimization results for example 2. manufactures will have a preferred tool that PCB designers can use to calculate the Impedance but there. 4 7 x100 ±5% = 4700 Ohm, 5% tolerance. Inputs. Remember that the exact width of the gap/clearance around the trace is also important. I am currently working on a design in which one of my ICs specifies the use of a 50 ohm trace. Use an impedance calculator to determine the trace width (W) and spacing (S) required for the specific board stack-up being used. Routed PCB – one net has width 10 mils and other net has width 20 mils. *DK below Trace is FR4 (approx = 4. This requires you to route the traces farther apart in order to hit a standard 50 Ohm impedance goal. For the signal trace of width W and thickness T, separated by distance H from a ground (or power) plane by a PCB dielectric with dielectric constant εr, the characteristic impedance is Relations bewteen Trace Width, Dielectric Thickness, Trace height, Er => Calculate Impedance. 254mm, spacing between both is required 0. The solution built into the above calculator enforces the limit (S/T) > 5 in order to ensure a result is returned. signal quality as well, potentially creating EMI problems. In that case I need to design a transmission line which has characteristic impedance of 50 ohms. Then the next question is why can’t 65 or 70 ohms be used?. 2) 50 Ohms is 50 Ohms (kind of). However, common impedance values for PCB traces are often 50 ohms or 75 ohms for RF and high-frequency applications. In fact, striplines often make components such as band-pass filter's more accurately, with more symmetric roll-off and no lower cutoff frequency. The compressive stress formula can be written as. 5 mm; substrate dielectric: 4. I am creating an RF PCB and require my RF signal coplanar trace to have a 50 ohm impedance. Since each square of ½ oz. Email: info@multi-circuit-boards. Outputs Internal Layers Required Trace Width: Resistance: Ω Ohms. when I calculate required trace width for 50 Ohm impedance for 0. The wider a trace is, the easier it is to fabricate. For better impedance control, use PCB design software you can trust. dielectric height is a standard 2 layer board, it is 1. It's free to sign up and bid on jobs. 75mm trace width for 4 layers, you barely meet the minimum width for a external trace in air. Re: RF 50 ohm PCB trace width. However, common impedance values for PCB traces are often 50 ohms or 75 ohms for RF and high-frequency applications. A basic rule of thumb is that the width of the trace is about equal to the thickness of the dielectric material to achieve a 50 ohm impedance on the line. To account for deviations, it’s customary to. It will be impossible for the PCB manufacturer to identify which signals are the regulated impedance traces, for instance, if you need a 5mil trace to achieve 50 ohms impedance, having routed other signals with a 5mil width. e. PCB Trace Power Handling Calculator. The total current of this circuit is 1A. $egingroup$ @Mito: The KiCad trace width calculator tool allows a choice of thickness units including oz/ft^2. Microstrip is a single trace on the top layer, with. There are a number of pcb transmission line typologies. This tool calculates all the predominant factors associated with a circuit board via design. T. 35 mils and space adjusted to 4. First, for 2. Where: Z0 Z 0 = characteristic impedance of the asymmetric stripline in ohms (Ω). This rule maintains the desired signal impedance. 725. For example on 0. It proved very useful for me when I had to design a board with surface-mount power transistors on. The JLCPCB Impedance Calculator computes track width values and recommended stack-ups from user-input values of board layer, thickness, copper weight, target impedance, trace spacing (for edge-coupled pairs), and impedance trace to copper gap (coplanar waveguides). This calculator helps translating the color bars from the resistor to its value. 3mm. Peak Voltage: Volts. Using this calculator **broken link removed**. Equation 4: Length of the trace . I was playing around with JLCPCB's impedance calculator and I noticed a significant reduction in the trace width with a 4 layer board when compared to a 2 layer board as you can see in the pictures below:. Quartz is the lowest loss substrate there is. Engineers pressured fabricators to create circuit boards with 50 Ohm impedance. 2mm (8mils) Minimum spacing between tracks: 0. In the images below, the thicknesses of De1 and De2 have been reduced to 120µm. 6mm board height) I tried a couple of online calculators and Appcad to calculate values for trace width and spacing to get 50 ohms. This means the cables need to be. Bulk resistivity of copper wire & trace is 1. 11mm) you get very narrow 50 ohms transmission lines (0. Some guidelines: 0. Eq. The resistance of a trace on a PCB depends on several factors, including the width and thickness of the trace, the length of the trace. The KiCad PCB Calculator is a set of utilities to help you find the values of components or other parameters of a layout. 5,115. I is the current in amperes. 906mil. Impedance calculators or formulas like the one mentioned earlier can help determine the required trace width. 8 mil. 6 mm is used) can anybody help me how to calculate 100 ohm impedance. Why does a 4 layer PCB board significantly reduce the trace Width needed for a 50 ohm transmission line when compared to a 2 layer PCB board? Hot Network QuestionsIPC-2152 Calculator. The via current capacity and temperature rise calculator is designed to assist you in building the perfect PCB vias. Peak Voltage: Volts. To use it, first select the. This calculator finds both odd and even transmission line impedance. It shows the minimum trace-to-ground spacing required to produce a 50 Ohm. Then all what do you need it to measure the input impedance. a 50 ohm impedance is often the required matching characteristic. Some of them include Microstrip, Stripline and Coplanar Waveguide. These impedances depend in first approximation on the following PCB parameters. PCB Coplanar Waveguide Calculator RF PCBs can be complex boards that need careful interconnect design and layout. A temperature rise in PCB trace width calculator is a tool or software that helps engineers and designers estimate the temperature rise in a PCB trace based on the trace width, current, and other parameters. Round up to nearest 5 mils. I used a similar calculator when I wanted a 50ohm trace for an 868MHz LoRa circuit. 4 mil trace thickness. Impedance trace widths based on Bittele's standard Stackups. 5 * sqrt (3) * sqrt (34. For a quarter wavelength antenna, it becomes λ /4 to be fixed. Ethernet: Ethernet lines. PCIe: From PCI-SIG standards, PCIe Gen1 has 100 Ohms differential impedance, and Gen2 and higher have 85 Ohms differential impedance. 6 mm is used) can anybody help me how to calculate 100 ohm impedance. This can bea straight trace inverted F, -type trace,. ra ns L i ne The common impedance of a PCB can vary widely depending on the design and application. PCB Impedance Calculation. A trace is a conductive path on a PCB that carries electrical signals between components. It’s a three-in-one calculator. If you use a microstrip trace impedance calculator, you’ll find that a trace thickness of 2 mils requires a trace width of 6. Narrower and thicker traces have higher impedance. In this stack-up, the layers are given, the required impedances are given, and the trace width and spacing between the traces are also given. The PCB Impedance Calculator in Altium Designer. Click into the Routing -> Width option. One of the most common inquiries that we encounter at Bittele electronics are regarding our standard trace widths for a given board thicknesses and copper weight. Mar 11, 2011 #8 FvM Super Moderator. Leave all of the other boxes alone. 76mm Rogers4350B substrate at a certain frequency and with 35 micron copper thickness, line width becomes 0. 45 Ohms for the following specs. Why is the impedance of microstrip lines 50 ohms? Not only for microstrip but mostly for coaxial cables and connectors in common use we have a 50-ohm zo. PCB Trace Width Calculator – The. A PCB's trace impedance depends on its geometry, core and prepreg material, and layers. 0008). Now to see the loss do these extra steps: 8. Using this calculator will help you get all the correct values. Why does a 4 layer PCB board significantly reduce the trace Width needed for a 50 ohm transmission line when compared to a 2 layer PCB board? Hot Network QuestionsIt should draw about 1. As hinted before in microwave frequencies you can a network analyzer to measure it by measuring S11. The IC only has room for 18. A 20 mil trace will have a much greater tolerance for losing metal than a 3 mil trace would. Equation R = ρ ⋅ L T ⋅W ⋅[1 + α⋅(temp − 25)] R = ρ ⋅ L T ⋅ W ⋅ [ 1 + α ⋅ ( t e m p − 25)] Where: ρ=resistivity L= length W=trace width T=trace height Note: ρcopper = 1. Note: The results are only for approximation and rough estimation, the final values and the. Width (W) Thickness (T) Substrate Dielectric (Er) These elements refer to the following diagram : On this list, many are constants and depends on the PCB making process and components. 152milimetre for most producers due to limitations in their etching processes and yield goals. ra ns L i neActivity points. For example: Yellow Violet Red Gold: 4 7 x100 ±5% = 4700 Ohm, 5% tolerance 1kOhm, 1% tolerance: Brown Black Black Brown Brown. 5 ohm, you could use a 1000 squares in series i. The tool calculated impedance at 50 ohms for my stackup but it complains that it violates an IPC-2141A constraint where trace height over trace width must be less than or equal to 0. 2V. 2mm, the. The allegro calculator gives a value of 56. So, if we route the differential pair in an FR-4 board with 35um copper and plating thickness the targeted impedance will be close to 90 Ohms. I am more interested in the impedance, reactance and resistance of traces in my question for given frequencies in pcbcad softwares for a given layer stackup than the antenna shapes. A 20 mil trace will have a much greater tolerance for losing metal than a 3 mil trace would. 20mm was called out as the width for both 90 ohm and 100 ohm, I would make 90 ohm 0. T. Note: Units do not matter for this calculation as long as they are consistent. 05ohms = 20, thus 4. 50 deg c rise at 20 deg C ambient, 1 layer [EDIT] - Forgot to add that this is for a 1" (25mm) long section of trace A simple online trace width calculator yields the following: Internal - 35. Points: 2 Thanks! Jul 26, 2021; Upvote 0 Downvote. 8). The resistance of a trace is important to estimate the power dissipate in a trace or to estimate roughly the voltage drop from a voltage supply based on the current flowing through the trace. This model was originally developed by analyzing trace impedance measurements using a regression model. Just a clean step. So lets assume you want a 50 ohm impedance trace and you are using 1oz copper and have a standard 0. Trace width is 4. *H 5 2. Many. To calculate PCB trace resistance, The 50 ohm PCB trace calculator is designed considering the following formula. Sierra Circuits’ Trace Width, Current Capacity and Temperature Rise Calculator is an advanced PCB tool that works based on the latest IPC-2152 standard. 62 MIL. 400 inches). When using 4-layer PCB, the gap between Top layer and Internal Layer 1 is only about 0. 4mm. 5. ANSWER: The wagon wheels spokes are very short length traces and are heat sunk to the plane. com Blog » PCB Trace Width Calculator There's other stuff that might be helpful on that site including a calculor to give you the thermal resistance of different sizes and plating thickness of via holes. In this calculator, we will show you how to calculate the trace width of a PCB for both internal and external traces. A temperature rise in PCB trace width calculator is a tool or software that helps engineers and designers estimate the temperature rise in a PCB trace based on the trace width, current, and other parameters. 5 A ampacity the trace width must be at least 42 mils, according to BITTELE calculator. It is one of the most crucial factors that should be calculated and analyzed when designing a PCB. com is the easiest search engine to find datasheets of electronic parts. Schematic:Calculate trace width values based using the IPC-2221 charts by providing inputs such as current thickness and temperature values. vishal. It calculates the trace width as 13. 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). 6 ohms. eu. To find out the width of the microstrip, enter the target impedance (Zo), trace thickness (t), dielectric thickness (h), and relative dielectric constant (εr). 22mm. If we want to hit the standard 50 Ohms impedance target, then we need to have a trace width of almost 110 mils! This is a huge trace width and is much larger than the pad size of any digital component you’ll place on a real board. If you know the values of any of the two parameters (conductor width, max temperature, max current capacity) it determines. PCB trace resistance is determined by the thickness, width, and length of the trace. From here, we can see that there are specific stack-ups where a CPW and a microstrip/stripline will have 50 Ohm impedance and the same trace width, even though the ground clearance is quite close clearance to the trace in the CPW. Doubt about 50 ohm impedance calculation. After changing W to 14 mil click “Analyze” and you can see Zo is now calculated to be 49 ohms. Z0,air Z 0, a i r = characteristic impedance of air. I MAX = (K x T RISEb) x A C. Optional Inputs:. 3 as fr4 material with 1. Online calculators or PCB design software can assist in determining the width. A Target Impedance of 50 Ω gives a forward calculated width (W1) of 94. As a second opinion, here is what Saturn PCB toolkit says: If a 120 thou trace is too wide, moving the plane closer to the trace will help. INPUT DATA. 3 mm traces. It shows the minimum trace-to-ground spacing required to. 93A, 1oz, 20c gives 50 mil trace width and 0. This is because the value of the trace resistance may lead to various design modifications and implementation issues. 35,852. i guess that will. Phone: +44 (0)1425 489 111 / +49 (0) 8104 628 0. To use it, first select the. The legend for all three curves is shown on the middle curve and that is a transmission line built on a 10mil thick RO4350B. 79um/60um) = 0. 254-0. A is the cross-section area [mils 2], I is the maximum current [A], T RISE is the maximum desired temperature rise [°C], W is the trace width [mils], T is the trace thickness [oz/ft 2], k, b and c are constants. 6 W /m. The calculator shown below uses Wadell’s equations for differential impedance, which can be found in the seminal textbook Transmission Line Design Handbook. A 1/2-oz copper pcb trace with 100- m m (3. 1 or 4. The propagation of electrical signals through PCB traces is not instantaneous; it is subject to a delay. After changing W to 14 mil click “Analyze” and you can see Zo is now calculated to be 49 ohms. Figure 2. 000 ohms!If you are not able to get a plane close enough (4mil - 2 times the trace width) I will suggest route G-N-P-G or G-S-G on the same in order to give the HS Signal a return path. 50 Ohm Transmission Line Calculator; Circuit Board Trace Width Calculator; 50 Ohm Pcb Trace; 50 Ohm Trace Width Calculator Formula; The above screen shows that the target parameter is 'Trace Width (W)' and the fixed parameters are 50 ohm Char. 6), the impedance will be approximately 50 Ohms. I believe Intel came up with the 85 Ohms target (about 20 years ago) for 2 main reasons. 010" to get a ratio of 0. $endgroup$ –So if your impedance is 50 ohm (which you need to deliver the maximal power to the load), then you can find the current. 2 mm width, 0. 005” trace for 50 ohms)Thus 10 mil wide trace, standard foil thickness, tha tis 1 inch long will have 70 ° C times 1,000 mils / 10 mils = 70 * 100 ==. 3)Try to orient module so antenna feed is shorter. Cite. You can better understand your calculator results by becoming familiar with the following formulas. 9 mils wide. 8, it will yield about 50. As we all know the formula-. To find out the width of the microstrip, enter the target impedance (zo), trace thickness (t),. 5 ohms. 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. Simons, "Coplanar Waveguide Circuits, Components, and Systems", Wiley. About 0. Eq. 15 mil, and the inductance would be 6. 60mm. Aug 30, 2017 at 17:50 $egingroup$ There is no straight forward chart that I know of because there are numerous factors that come into play (i. For CW (which is indeed the worst-case), the calculations is the same as for DC. 3 mil prepreg, 5 mil core) Isola I-Tera-120. 378 [mils/oz/ft 2 ]) Where: A is the cross-section area. 2mm (8mils) Preferred track width for. *DK above Trace is Air ( = 1. 79um) copper, simply pre-scale the equivalent current based on the resistivity and trace thickness. *DK below Trace is FR4 (approx = 4. 8 mil traces, and that is assuming no space between. A 4-layer board with a defined weight. Verifying Controlled Impedance Routing. Our current online trace width calculator is useful for clients who need to calculate the minimum/maximum trace widths for. 6mm thick. Therefore, the trace height and width you choose for 1 GHz will be a slightly different impedance at 10 GHz (if you need to worry about the difference, you probably already know about the difference!) This model was originally developed by analyzing trace impedance measurements using a regression model. Here, = resistivity at copper. The Trace Width is the parameter in question which should be 8. To use it, first select the. 3 different line width microstrips, each 9 inches long 50W cable TDR response 50 mV/div 500 psec/div--400mV--300mV--200mV--100mVIPC 2221 PCB Calculator trace width. For instance, a microstrip trace width is 20 mils and 11. I mean to calculate trace width from Impedance , one surely needs to know the working frequency . Search for jobs related to 50 ohm pcb trace width calculator or hire on the world's largest freelancing marketplace with 22m+ jobs. 725 For IPC-2221 external layers: k = 0. required current rating, copper weight, the allowable temperature rise of your board). a 10 mil wide by 10. Here are some typical design rules and guidelines to follow for track widths on a PCB: Minimum track width: 0. why are all the online calculators and thier formula dont inclue lenght into the. 03) it gives me almost 160 Ohm - and even if use 53mil conductor height or. a 10 mil wide by 10. 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. PCB Trace Width Calculator Trace width is an important design parameter in PCB design. The close trace to plane coupling will decrease the crosstalk between traces and allow us to maintain the impedance at an acceptable value. I have to change again the track width to achieve the 50 Ohm impedance again because we have changed the stack up. It's for a 2-layer 1. 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. W W = trace width. Use a 4-layer board so you can achieve h ~= 0. The dielectric constant of a material IS slightly frequency dependent. There are many demands placed on PCB stackup design. 5 ohms. It’s a three-in-one. Download Presentation. Now, to get to 0. In the attachment you can see that in the Stack up Editor, I can calculate trace width for single ended trace that gives 50 ohm impedance for a given stack up settings. I am designing my first 50 ohm impedance trace on a PCB that connects to a single wire antenna. TM. IPC-2152 Calculator. If so, then I would put 0 ohm resistors in series with the CAN lines on the main connector. The exact number will be a product of a number of factors that define the optimum trace width. You can calculate the maximum current using the formula below. ϵr ϵ r = substrate dielectric. Maximum Current. High-speed designs carry a requirement for controlled impedance, crosstalk control, and the need for interplane capacitance. Now, I could find right track length using Smith chart, or modify the values to obtain 50 ohm value. 625 mm and for higher tolerances, the trace width is kept at 10-12mil or 0. A 1mm dielectric seems a bit too thin to me. 50 ohm microstrip transmission line insertion loss , showing the different components of the insertion loss, when using the same material at different thicknesses. Assuming a standard 0. Feedline Impedance (Z (Feedline)) Ohms. What is the minimum trace width of an external PCB copper conductor with these conditions:carrying 8 ampsassume a 30°C increase in temperature over. 11. Why is it so low in attenuation? Two reasons. 0 Differential) impedance. 1 Ohm, the trace length must be about 8. The PCB trace resistance calculator works in a straightforward way: fill in the Inputs, and you will get the Output. For a standard FR-4 substrate with a dielectric constant of around 4. . PCB manufacturing tolerance exacerbates the problem, as traces on dual-. meys23 2 years ago. T T = trace thickness. For most manufacturers, the minimum trace width should be 6mil or 0. 2mm, it may be better idea to use microstrip line, with reference to the bottom layer. The width of the trace you need is in the "W" box. PCB Calculator 6 / 7 2. T. Excite the other end of the trace with the function generator. Therefore, for a 0. Sierra Circuits’ Trace Width, Current Capacity and Temperature Rise Calculator is an advanced PCB tool that works based on the latest IPC-2152 standard. To use it, first select thetolerance of the resistor: 10%, 5% or equal or smaller than 2%. Improve your PCB layouts today! Calculator Pack. The Track Width tool calculates the trace width for printed circuit board conductors for a given current and temperature rise. Here, you’ll see a maximum current calculation for that section of trace. You can access serveral online sites to help calculate a trace with Z0 of 50 Ohm. ALTIUM DESIGNER. And as the PCB circuit complexity. The PCB material will be FR-4 with 1. 18. In addition to the characteristic impedance of a transmission line, the tool also calculates. It’s quite possible that the layer spacing is, in fact, 1. Figure 4. Four separate currents (1 A, 5 A, 10 A, and 50 A) were used to calculate the minimum trace widths to stay within a 20°C trace temperature rise. Advanced Circuits is MIL-PRF-31032, MIL-PRF-55110G, AS9100C, ISO 9001:2008 Certified, IPC 6012 Class 2, 3 and 3A Qualified, and ITAR Registered. diffPairpitch swept from 0 mil to 50 mil for 85 ohm stripline (4. This is good enough so we can now switch to the “Coupled Microstrip Line” calculator. N. But if that is what you have, and with FR4, your microtrace width should be around 1. Let's calculate the trace thickness and trace spacing- Som with a 15% tolerance and 90 Ohms targeted impedance, the conductor width required 0. There are tables which define the width of the trace as a function of the current. 4 ohms; differential impedance: 90. Your trace width and spacing calculate out as a 50 ohm trace on a couple of calculators I checked, so that should be okay. For example: Yellow Violet Red Gold: 4 7 x100 ±5% = 4700 Ohm, 5% tolerance 1kOhm, 1% tolerance: Brown Black Black Brown Brown. These equations are. Coplanar Waveguide Calculator. 8 Mils and the FR-4 dielectric of 3. 6%. I am developing a 4-layer FR-4 board containing a GNSS receiver (L1 + L2). 4. 5 ohm, you could use a 1000 squares in series i. 0007' to 0. If you reduce this trace width to 19 mils, the characteristic impedance will result in about 52. Use the max current (Imax) and max current density (J) to determine minimum trace width: Trace Width (mils) = Imax (A) / J (mA/mil2) Add margin of 20% for reliability. 4 GHz -> wavelength in air is 122mm -> wavelength in FR4 is approx. The standard Height is. 4 DisplayPort Parameter Value Frequency. PCB traces - a brief overview Output Impedance (Z): 138 Ohms Choose Type Microstrip Impedance Calculator Edge Coupled Microstrip Differential Impedance Calculator Wire Microstrip Impedance Calculator Embedded Microstrip Impedance Calculator Wire Stripline Impedance Calculator Edge Coupled Stripline Differential Impedance Calculator 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. 11. 040 inches) for power traces. “Good design practices with FR4 will usually do the trick.