Engineering Selection Reference
Rogers 5870 PCB: 5870 microwave-coupler fabrication review
5870 microwave-coupler fabrication requires current-drawing review. RT/duroid 5870 bare couplers need port numbers, termination conditions, and coupling-gap drawings. Review PTFE hole treatment and thin-copper geometry together; do not merely rename 5880 designs. Deliver trace/gap dimensions and lots; agree coupling, isolation, and directivity using complete four-port methods.
Rogers 5870 PCB work first requires defined prototype or production scope. Provide Gerber data, drill files, board outline, and layer stackup, materials/processes, quantities, and acceptance requirements. 5870 low-Dk coupled lines and four-port tests derive procurement value from coupling structures, not renamed materials
5870 microwave-coupler review first checks 0.508mm 5870 and four-port geometry. Quotations also need port numbers, terminations, and hole categories. Subsequent specification/input tables link targets to inspection methods.
Why select this 5870 coupler structure?
For directional RF power detection, RT/duroid 5870 double-sided couplers define main/coupled lines and isolated/detection ports together. The 0.508mm low-Dk dielectric provides a four-port reference, making measurable results easier to specify than purchasing a generic low-loss board.
How much does Rogers 5870 coupler PCB fabrication cost?
Costs include 0.508mm RT/duroid 5870, PTFE hole processes, coupling-gap control, thin copper, and immersion-silver protection. Four-port tests add port structures, fixtures, and measurement scope beyond ordinary bare-board electrical tests. Align coupled-line lengths, gaps, and bands; specify bare boards versus measurable coupler samples.
Quotation terms depend on the approved files, quantity, material supply, tests and delivery requirements.
Prepare a structured RFQ or use the short inquiry form.
Enter the following items in one itemized quotation: specify cost units and tax/shipping basis, with separate columns for first orders and same-revision repeat orders. The table is a procurement breakdown method, not a ready-made price list; reference specifications require approval against current fabrication drawings.
| Quotation items and scope | Inputs to confirm for this configuration | Same-revision reorders and changes |
|---|---|---|
| Materials/fabrication, quoted per batch or accepted board | Rogers RT/duroid 5870; 2 layers; base copper 18µm/finished target 25µm | Recurs on repeat orders; material, layer-order, or copper-weight changes require requotation |
| Holes and forming, per approved hole table | Ø0.30mm ground through-hole target; no vias between coupled lines | Same-revision reorders; review processes before microwave-coupler orientation changes |
| Surface finish/packaging, noting areas and batches | Immersion silver; coupled lines without solder mask | Incurred by actual batch; confirm packaging, storage conditions, and surface-finish substitutions separately |
| Engineering/tooling preparation, identifying one-time or per-batch charges | Microwave-coupler orientation: provide coupled-port numbers, reference impedance, isolation/coupling targets, and installed connectors. | Verify file revisions, ownership, and storage condition before reusing old tooling; do not assume reuse is free |
| Structural/special inspections, identifying coupons, hole groups, or samples | Agree coupling-gap dimensions and four-port measurements; one through-line test is insufficient. Trace hole categories/measurements to approved drawings. | List initial prototype validation and per-batch sampling separately; quote per-board requirements separately rather than assuming everything is completed once |
| Delivery scope, reports, and accepted quantity | Coupler bare PCBs, coupled-line/gap dimensions, material lots, and agreed four-port test structures/data. | Retain revision links and batch records on repeat orders; list component assembly, firmware, and complete-unit testing separately |
How do 5870 and 5880 coupler boards differ?
Materials have different Dk/Df and geometry. This 5870 configuration serves four-port directional coupling; this site's 5880 page covers patch antennas. Lower 5880 Df does not justify unchanged-artwork substitution. For coupler comparisons, build same-band structures for each dielectric and check coupling, isolation, and directivity.
| Comparison Dimension | Rogers 5870 PCB fabrication | Rogers 5880 antenna PCB |
|---|---|---|
| Material and Grade | Rogers RT/duroid 5870 | Rogers RT/duroid 5880 |
| Layer Count and Structure | 2 Layer | 2 Layer |
| Hole Structure and Dimensions | Ø0.30mm ground through-hole target; no vias between coupled lines | Ø0.40mm feed/ground holes; avoid holes in antenna radiating areas |
| Application | Directional couplers; RF power-detection front ends | GNSS antenna prototypes; low-loss microwave patch antennas |
How should coupler PCB spacing, line lengths, and copper weight be selected?
Coupling gaps/lengths jointly determine coupling, directivity, and bands. Define bands/targets first, then model actual finished copper/finishes. Do not arbitrarily add vias between lines; maintain identical port planes. The 0.15mm minimum routing reference is not a coupling-gap tolerance.
| Review step | Project inputs | Reviewable output |
|---|---|---|
| 1 Define use and scope | Provide coupled-port numbers, reference impedance, isolation/coupling targets, and installed connectors. | Agree coupling-gap dimensions and four-port measurements; one through-line test is insufficient. |
| 2 Confirm structural requirements | List ground vias, connector holes, and nonplated mounting holes separately. | Trace hole categories/measurements to approved drawings. |
| 3 Match signal nets to fabrication targets | 50Ω ports; four-port VNA coupling/isolation measurements | Provide target nets, layer pairs, and verification scope; review with Ø0.30mm ground through-hole targets and no vias between coupled lines |
| 4 Confirm quotation and approved revision | Rogers RT/duroid 5870; 0.56mm target excluding solder mask; immersion silver; coupled lines without solder mask | Request quotations using material/pattern/inspection lists at the same revision; list unapproved substitutions as separate alternatives rather than including them in the baseline quotation |
5870 coupler board manufacturing specifications
| Specification | Reference configuration or target |
|---|---|
| Material and Grade | Rogers RT/duroid 5870 |
| Layer Count and Structure | 2 Layer |
| Total Board Thickness | 0.56mm target excluding solder mask |
| Dielectric thickness and interlayer relationship | 0.508mm core board |
| Base Copper and Finished Copper | Base copper 18µm/finished target 25µm |
| Hole Structure and Dimensions | Ø0.30mm ground through-hole target; no vias between coupled lines |
| Trace Width and Spacing | 0.15/0.15mm reference minimum design; coupling gaps controlled separately |
| Impedance Target and Measurement Methods | 50Ω ports; four-port VNA coupling/isolation measurements |
| Surface Finish | Immersion silver; coupled lines without solder mask |
| Manufacturer material data | RT/duroid 5870: process Dk 2.33±0.02 at 10GHz; design Dk 2.33 at 8–40GHz; Df 0.0012 at 10GHz, manufacturer typical values |
| Application | Directional couplers; RF power-detection front ends |
| Deliverables | Coupler bare PCBs, coupled-line/gap dimensions, material lots, and agreed four-port test structures/data. |
5870 coupler layer sequence and hole structure
The following shows functional layer order/material structure for this reference configuration, not a production stackup drawing; do not infer thickness from graphic proportions. Match copper-layer numbering to via layer pairs item by item in approved fabrication files.
| Top to Bottom | Layer Responsibilities/Structure |
|---|---|
| L1 | Main line/coupled line/four-port |
| L2 | Coupler Reference Ground |
Hole structure: Ø0.30mm ground through-hole target; no vias between coupled lines
5870 dielectric and loss model
5870 process Dk supports material comparison; transmission/resonance models use applicable design Dk. Freeze thickness, foil, and finish revisions together; return first-article geometry for design review. Material Df is only a loss-budget input.
PTFE processing and coupling-bandwidth tradeoffs
Selecting 5870 entails PTFE processing and larger RF geometry. Gaps/lengths affect coupling, directivity, and bands together; merely renaming 5880 as 5870 cannot preserve unchanged artwork.
Coupling gaps, perimeter ground vias, and port pads: manufacturing checks
Do not add ground vias between coupled lines; perimeter vias/ports follow the same model. Drawings define critical gaps; thin copper/finishes affect effective geometry. Keep pad/connector assembly conditions identical across all ports.
Four-port coupling, isolation, and directivity: acceptance items
Use four-port VNA to record through loss, coupling, isolation, and directivity; set limits by design band. Check bare-board dimensions/electrical tests too, maintaining identical reference planes between first-sample/production structures.
5870 coupler board delivery scope
Applications: directional couplers; RF power-detection front ends.
Coupler bare PCBs, coupled-line/gap dimensions, material lots, and agreed four-port test structures/data.
Port numbers, terminations, and hole categories: quotation inputs
Submit port numbers, terminations, and hole categories to convert targets into inspectable drawings. Inputs determine artwork, material, or structural inspection scope; quotation revisions freeze with approved drawings.
| Required project inputs | Engineering Decisions Affected | Records/delivery as agreed in the order |
|---|---|---|
| Microwave coupler port orientation | Provide coupled-port numbers, reference impedance, isolation/coupling targets, and installed connectors. | Agree coupling-gap dimensions and four-port measurements; one through-line test is insufficient. |
| PTFE via processing | List ground vias, connector holes, and nonplated mounting holes separately. | Trace hole categories/measurements to approved drawings. |
Rogers 5870 PCB fabrication: pricing, selection, and procurement FAQs
How much does Rogers 5870 coupler PCB fabrication cost?
A project-specific quotation requires review of the available files, quantity, materials, requested tests, delivery destination, taxes, shipping, and trade terms. The complete budget is materials/basic fabrication + excluded profiling + specified inspections + taxes/freight, divided by delivered board count. These hypothetical amounts are not current market prices for this configuration. Any formula on this page organizes cost inputs; it is not a quoted rate.View cost items, calculation conditions, and sources.
How do 5870 and 5880 coupler boards differ?
Manufacturer 10GHz typical values give 5870 process Dk 2.33/Df 0.0012 and 5880 process Dk 2.20/Df 0.0009. Different dielectrics change geometry for identical targets. This 5870 serves four-port coupling; this site's 5880 page covers patch antennas. Recalculate substitutions for identical coupling targets and measure directivity instead of reusing artwork. View Specific Comparison Basis
How should coupler PCB spacing, line lengths, and copper weight be selected?
Select lengths/gaps by bands, coupling, and directivity, then model finished copper/finishes. Do not automatically add interline vias; maintain port planes. The 0.15mm minimum routing reference is not critical coupling-gap tolerance. View Specific Comparison Basis
Do 5870 prototype quotations include detector components?
This is a coupler bare board; detector components, connector assembly, and power calibration are separate. Specify measurable through/coupled-port samples to avoid confusion with complete power-detection module pricing.
Is measuring only S11 sufficient for the directional coupler?
No. Also check through loss, coupling, isolation, and directivity at agreed four-port planes. Single-port return loss cannot establish suitability for power detection.
Can production automatically add ground vias to 5870 couplers?
Perimeter vias must match models; automatic interline vias alter fields. Fabrication compensation/panel adjustments must preserve coupling geometry. Return modifications to design verification first.
Can two-port tests cover four-port applications for 5870 couplers?
They cover only agreed two-port paths, not complete coupling/isolation. Itemize four-port measurements by port numbers, terminations, planes, and targets, distinguishing through-loss-only quotations. Retain hole-category/coupling-gap records too.
How are per-board and per-panel Rogers 5870 PCB quotations converted?
Retain four-port numbering/terminations and critical gaps in panels; list ground/mounting holes separately. Do not remove an end and estimate as a two-port board. State finished boards per panel, purchased panels, and delivery format. Divide actual panel costs by accepted quantities; itemize setup, special inspections, and packaging. Utilization does not guarantee yield.
How are first-order one-time costs separated from Rogers 5870 PCB reorder costs?
First confirm coupler orientation/PTFE hole-treatment documentation; identify one-time engineering/tool/test charges. Agree gaps/four-port measurements; one through-line test is insufficient. Confirm files/ownership before tool reuse. Current materials, fabrication, and inspections still incur costs; separately list setup repeated after changes instead of old totals.
Can I obtain a Rogers 5870 PCB budget before coupler-orientation documentation is complete?
Provide applications, outlines, quantities, and drawings for an estimate identifying gaps. Formal review needs coupled-port numbers, impedance, isolation/coupling targets, and connectors. Agree gap dimensions/four-port measurements rather than one through line. Confirm fabrication/inspection pricing after conditions freeze. Initial inquiries need not contain every file; estimates do not cover undefined structures.
What requires reconfirmation when Rogers 5870 PCB reorders change materials, hole tables, or mounting?
List ground vias, connector holes, and nonplated mounting holes separately; trace categories/measurements to approved drawings. Match changes against previous material/hole-table/mechanical files to determine drawing/process revisions or remeasurement. Names/layer counts alone do not establish identical reorder conditions.
What configurations should be compared when two Rogers 5870 PCB quotations use identical materials?
Check 5870 thin copper, coupling geometry, and four-port definitions. Two-port through loss cannot replace coupling/isolation; detectors/power calibration are not automatically included in bare-board prices.
Which reports must link to board numbers before Rogers 5870 PCB samples enter production?
Agree gaps/four-port measurements; one through line is insufficient. Trace hole categories/measurements to drawings. Link lots, approved files, and inspections to sample numbers; production uses issue-closed revisions. Old coupon/artwork reports support comparison, not current manufacturing inputs. Define uncovered system scope separately.
How can lower small-batch Rogers 5870 PCB unit prices be checked against total procurement costs?
Itemize connectors, detectors, and calibration separately for four-port couplers versus complete detection modules. Cheaper two-port insertion loss does not cover coupling/isolation. Sum setup, fabrication, inspections, packaging/shipping, then divide by accepted quantity for equal-scope comparisons. Use current inquiry rates; assume no fixed reduction.
5870 coupler versus related board types
Current distinction: 5870 low-Dk coupled lines and four-port tests derive procurement value from coupling structures, not renamed materials
- Four-layer RO4350B specialty-dielectric RF multilayer board — Four all-specialty-dielectric layers differ from FR4 hybrid construction; pressed bonding-sheet dielectric also enters the model
- RO3010 high-Dk miniaturized patch antenna board — High Dk reduces dimensions, but bandwidth, temperature drift, and tolerance sensitivity require separate verification
- TMM10i high-Dk resonant filter board — Thermoset ceramic materials and thicker dielectric serve resonant structures, with a different role from RO3010 antennas
Complete Rogers PCB product catalog · All PCB Products
5870 coupler material and design basis
- Engineering reference | RT/duroid 5870 and 5880: PTFE laminate procurement and fabrication: Published manufacturer material data
When citing these sources, record revisions/conditions for 0.508mm 5870 and four-port geometry. First-article checks emphasize coupling, isolation, and directivity. Update drawings/inspections before releasing material, copper, or hole-structure changes.
Request Quote for This PCB Configuration: Reference product ID 337, attach critical circuits/interfaces and quantities, and identify specifications to retain or adjust.
