LONDON-( )-Polar Instruments announce the launch of an automatic coupon generator which dramatically reduces the time required to generate impedance test coupons compared to manual or scripted systems. Conventional methods of coupon generation require both skill and time, and even scripted systems may not be able to produce complex coplanar or waveguide coupons. These systems are also prone to errors which can result in incorrect line widths on the finished coupon. Designed for use with Polar Instruments ’ industry-leading Speedstack PCB or Speedstack Si printed circuit board (PCB) stackup design and documentation systems, the automated Coupon Generator imports complete stack-up designs directly from Speedstack. These are compiled with the user ’s preferred coupon format and the chosen test probe style, which is selected from a library of the most frequently-used IP probes for CITS impedance test systems.
Speaker Impedance Calculator
The Coupon Generator automatically produces an RS274x extended gerber file and drill file which can be exported to the CAM system. “The Speedstack automated Coupon Generator provides a break-through for PCB manufacturers by producing coupons in a fraction of the time it would take using conventional methods.
This helps to speed the overall turn-round time for the PCB and increases the accuracy of the finished test coupon, ” explains Martyn Gaudion, Polar Instruments ’ Sales & Marketing Director. About Polar Instruments Polar Instruments is a market leader in designing and manufacturing tools to simplify and enhance the design, fabrication and testing of printed circuit boards (PCBs). Their innovative tools include the industry-standard Controlled Impedance Test System (CITS) which provides the global PCB industry with an easy-to-use test system for high-speed digital and RF boards, as well as class-leading tools for fast and accurate design and testing of controlled impedance in PCBs.
Polar also leads the industry in tools for automated PCB layer stackup design and documentation. Jogos para baixar. Polar Instruments was established in 1976 and now has operations in the US, UK, Europe, Japan and Asia Pacific.
Inally available only as part of Polar’s Speedstack impedance field solver and layer stackup system, the new standalone impedance coupon generator accepts data pasted directly from Polar’s Si8000m field-solving impedance calculator or Si9000e PCB transmission-line field solver, in addition to the full Speedstack stackup system. Users can also choose to enter their own data manually, or to import XML files. Developed for use by PCB manufacturers, or design engineers who want a tightly-controlled and seamless transition from design to manufacture, the Speedstack impedance coupon generator can also be used to produce RIE coupons for testing high-frequency losses in base materials. To create Gerber files for impedance test coupon production, the designer builds and documents a PCB stack manually, or using one of the Speedstack tools. For a manual or scripted process, the build data for the PCB stack is keyed into the coupon generator, or imported as an XML file. For a PCB stack created with one of the Speedstack tools, the build data can simply be pasted directly into the coupon generator. The generator compiles the stack-up build data with the preferred coupon style and dimensions, including thieving, adds the footprint for the selected standard, controlled impedance test system (CITS) probe and exports a pack of Gerber files which can be imported for panellisation.
Managing director, Martyn Gaudion, explained, “Speedstack coupon generator extends the ability to produce impedance test coupons of the highest accuracy to designers working outside the full Speedstack PCB environment and provides the flexibility to create accurate build data for impedance test coupons at any stage of the stack design process. For designers who prefer to use manual or scripted methods of stack design, this new tool replaces hours of manual work with a fast and easy process for coupon generation.“ The Speedstack toolset comprises PCB impedance and transmission line field solvers, a PCB stackup designer and the new standalone impedance coupon generator which simplifies the design of accurate impedance test coupons for complex multi-layer PCBs.
CHEMANDY ELECTRONICS Suppliers of the unusual. Microstrip Transmission Line Characteristic Impedance Calculator Using The IPC-2141 Formula The characteristic impedance (Z o) of a microstrip transmission line can be calculated using the active calculator or the formula at the bottom of the page. Enter the ε r of the PCB: Enter the width of the track: mm Enter the thickness of the track: mm Enter the thickness of the dielectric: mm Characteristic Impedance (Z o): Ohms This calculator uses Visual Basic and will work in Internet Explorer and other browsers with Visual Basic plug-ins. For more information see. A further is available in JavaScript. The calculator gives very similar results to those in Table 1 of an article at The following formula is given in the above article by Polar Instruments. Where ε r is the Relative Dielectric Constant W is the Width of track t is the Thickness of track (1 oz/ft2 = 0.035 mm) h is the Thickness of dielectric Note that the 'h', for dielectric thickness in this formula is omitted in some other Polar publications.
Impedance Matching
The original source of formula is IPC-2141: Controlled Impedance Circuit Boards and High-Speed Logic Design, April 1996. IPC have their website at: This calculator is provided free by Chemandy Electronics in order to promote the Return to.
Impedance Impedance-controlled conductors with Microvias Electromagnetic waves propagate at a finite speed. This propagation speed depends on the material used (ε dielectric constant) and can be determined approximately with the formula c Signal ≈ c Licht / √ε r. For FR4: c Signal ≈ 150.000 km/s. Due to the finite propagation speed, the following rule of thumb formula applies: The spatial dependence of voltage and currents becomes significant for a conductor length λ / 10. Impendence matching should be implemented to avoid transmission faults. Production-compatible conductor tracks can be realised for impedance-matched system through the use of microvias.
Field Solver 8.0 from Polar Instruments is used to calculate the impedances. On request we can produce your circuit boards to include a test coupon for impedance measurement and subsequently evaluate it with the aid of a modern TDR (Time Domain Reflectometer) cable radar. We would be pleased to help you with planning and implementing your impedance-controlled circuit board.!
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