勛圖tv 繚 ENGINEERING GUIDE
Nan Ya NPG-198K PCB: Low-Loss Channel Tradeoffs
Nan Ya NPG-198K is presented in a dated manufacturer guide as a low-loss material. The useful engineering question is whether its proposed construction improves a defined channel enough to justify the full project cost. A loss-tier label is a selection aid, not an interface qualification.
This page focuses on matched electrical and commercial comparisons. The Nan Ya material overview covers the wider range; retain the exact NPG-198K source and revision in the review.
Use dated material data with its context
The 2021 manufacturer poster gives NPG-198K a 10 GHz characterization pair of Dk 3.23 and Df 0.0020. Those are dated source values, not a promise that every current supplied construction has the same design inputs. Obtain the controlled sheet for the offered material.
Keep the product distinct from NPG-199K. Similar loss categories or neighboring numbers do not establish an equivalent reinforcement, copper option or approved substitution. A current supply response is needed for availability and construction details.
Material facts and decision boundaries
| Item | Source or model context | What it does not establish |
|---|---|---|
| Dated guide | NPG-198K:3.23 /0.0020 at 10 GHz | 2021 characterization context. |
| Comparison | Matched route and allowance scope | Include verification effort. |
| Decision | Useful margin versus full cost | No automatic recommendation. |
Compare complete routes at the same boundary
State the frequency, reference planes, route length and included transitions. The routing-loss rate should come from compatible measurement or a validated model for the actual copper and geometry. Do not compare dielectric-only estimates with complete line measurements.
The NPG-170D guide explains the limited role of Dk/Df in a dielectric-loss illustration. A lower material Df can motivate investigation, but the finished route's benefit depends on other losses and construction changes.
| Review item | What to establish |
|---|---|
| Dated evidence | NPG-198K source revision kept with data. |
| Matched comparison | Same route, frequency and loss boundary. |
| Allowance source | User quotes or explicitly labeled assumptions. |
| Model limit | Loss difference is not interface qualification. |
Make the benefit and allowance visible together
The worksheet uses a common route length, two complete loss rates and two user-entered unit allowances. Its example compares 10 inches at 1.0 and 0.6 dB/in, giving a 4 dB routing-loss difference. The 20 and 27 allowance units are hypothetical and contain no material pricing.
The result does not decide whether the extra allowance is worthwhile. That judgment depends on the required margin, available alternatives and verification effort. A comparison is useful only when quantity, copper, inspection and other deliverables have the same scope.
Matched construction loss and allowance comparison
Matched construction loss and allowance comparison
Use the current inputs and keep the assumptions
Start with the example only to inspect the units and the calculation boundary. Replace every assumption with a value tied to your own document or measurement. An empty numeric field is not zero. The review-reference field is a local label; avoid entering customer names, confidential part numbers or other private information into a public worksheet.
After calculating, read the notes alongside the numerical result. Changing any input invalidates the displayed result and disables its download until you calculate again. For a comparison, keep the units, geometry, material condition and measurement boundary consistent. A long decimal result does not imply equally precise input data. The downloadable record stays on your device and can be attached manually to an inquiry. It is not automatically transferred into the Contact form.
If an input is unknown, identify the person or document needed to resolve it. Do not fill a gap with a favorable generic value simply to obtain a result. You can request a material or fabrication review without using the tool. The arithmetic illustrates a relationship; it does not accept a construction, certify a material, establish current pricing or replace a supplier process specification.
| Input | What to establish before using it |
|---|---|
| Review reference | Nonconfidential revision label. |
| Common routing length 繚 inches | Same channel boundary and frequency for both candidates. |
| Candidate A complete loss 繚 dB/in | From comparable measurement or simulation, not Df alone. |
| Candidate B complete loss 繚 dB/in | Use same copper, line geometry assumptions and reference planes. |
| Candidate A quoted unit allowance | User-supplied currency value; no embedded price data. |
| Candidate B quoted unit allowance | Same quantity, scope and currency as A. |
| Currency or allowance unit | Label only; no currency conversion. |
Optional cost comparison from your own allowances
Use a quotation or a clearly labeled internal assumption for each input. Keep the quantity, construction and inspection scope the same when comparing alternatives. This uncalibrated planning model adds entered values; it contains no current market rates and does not issue a 勛圖tv quotation. You can contact the team without completing it.
Optional project allowance comparison
Preserve the actual construction in the decision
Record glass style, resin content, dielectric intervals, copper profile and final trace geometry. A new material may require different routing dimensions to meet impedance. The change can affect conductor loss and available tolerance as well as the dielectric contribution.
Agree representative test structures and how results will be interpreted. A coupon for one layer or geometry does not automatically qualify every route on a complex board. Keep the measurement boundary with the accepted stackup.
Include the intended environment and approval route
For an automotive-oriented comparison, NPG-190BH addresses mission-profile and evidence questions that remain separate from a loss ranking. NPG-198K is not automatically approved for that application because its attenuation appears favorable.
Identify chemical, thermal and traceability requirements and any restrictions on changing material or copper. Include one-time qualification and model updates in the commercial comparison. A lower recurring allowance can conceal a larger change cost if those items are omitted.
Send a matched-scope quotation request
Provide the exact material sources, proposed constructions, operating band, critical routes, board dimensions and quantity. State the required margin and evidence, and identify which alternatives are open. Keep assumptions visibly separate from measured data.
勛圖tv's proposal depends on the actual files and agreed scope. The worksheet is optional, stays local and can be attached manually. It does not confirm stock, issue a quote or establish a data-rate guarantee for NPG-198K.
Tie the exact grade to an electrical construction
State the channel reference planes, frequency range, routing length, copper construction, transitions and interface assumptions together. A laminate loss-tangent value is one input to that system. It is not a complete insertion-loss measurement or a guarantee that a data rate will work.
Use comparable measurement or modeling conditions when screening alternatives. Material changes can require geometry changes to preserve impedance, and copper roughness can alter the result independently of the resin system. Keep the proposed stackup and the channel analysis synchronized through fabrication review.
For procurement, identify the properties that are fixed and the alternatives that can be evaluated. Request evidence at the relevant construction and frequency rather than a broad low-loss label. Compare total delivered scope and validation effort alongside material price. A shorter or better-routed channel may change the tradeoff more than replacing a material name alone.
A useful design-data record retains both the material value and the reason it was selected. State whether the value is supplier characterization, a construction-specific design input, a measured coupon extraction or an early assumption. These sources are not interchangeable. Keep frequency, method and specimen information visible when a comparison uses more than one document.
The tool on this page starts empty because a plausible default can otherwise be mistaken for a verified grade profile. Use the example to understand the units, then replace it with project inputs. A result with many decimal places does not imply that the material or routing-loss input is known to that precision.
For a high-speed design, plan how the model will be checked. Reference planes, coupon geometry, fixtures and the acceptance boundary determine what a measurement means. A coupon that characterizes one line construction does not automatically qualify every route or transition on the board.
Keep the commercial comparison aligned with the engineering one. Quantity, copper, layer structure, test deliverables and qualification effort should be comparable. A lower material allowance can be irrelevant if the proposed construction cannot meet the channel requirement, while a premium grade may be unnecessary if the actual route already has sufficient validated margin.
Standards, source context and limits
Use the edition, amendment and material-document revision named in the purchase agreement. A standards title, marketing label or supplier product family does not establish that a particular lot meets a requirement. Public summaries are useful for scope; the controlled specification and applicable test method govern acceptance.
The examples on this page are illustrative engineering scenarios. They are not 勛圖tv production records or guaranteed material values. Source links identify the organizations responsible for the referenced information. Confirm applicability to the exact grade, construction and test condition before carrying a number into a drawing or qualification report. Sources were reviewed on 3 October 2026. A public catalog search is not proof that an unlisted product never existed. Where the exact designation or current technical sheet could not be verified, this page provides a clarification workflow rather than an invented material specification. Current supply, construction availability and qualification remain separate questions.
For fabrication scope and the agreed construction requirements, see PCB manufacturing.