Is RT 5880 the right PCB material for your low-loss high frequency design? RF, microwave, antenna, radar, and broadband communication boards need stable dielectric behavior, controlled impedance, and low signal loss.
RT 5880 helps these designs because it uses a PTFE-based structure with very low dielectric loss and a low dielectric constant. This article explains Dk, thickness, loss tangent, datasheet values, common uses, price factors, and fabrication control points before sending a board for production.
What is RT-Duroid 5880?
RT-Duroid 5880 is a glass microfiber reinforced PTFE high frequency laminate used for stripline and microstrip PCB circuits. Rogers describes this laminate as a PTFE composite reinforced with glass microfibers. It is designed for high frequency and broadband applications.
This material is different from standard FR4. FR4 works well for many ordinary electronic boards, while RT-Duroid 5880 is made for circuits where dielectric behavior directly affects signal transmission.
The randomly oriented glass microfibers help maintain dielectric constant uniformity. This gives the material more predictable RF behavior across panels and frequencies.
Why Is RT 5880 Used for High Frequency PCB Designs?
RT 5880 is used for high frequency PCB designs because it provides low Dk, very low dielectric loss, and stable RF behavior. In high frequency circuits, the substrate is not just a mechanical carrier. It becomes part of the electrical path. Here are main reasons include:
- Low dielectric constant: A Dk near 2.20 helps reduce dielectric loading and allows wider RF traces for many impedance targets.
- Very low loss: A dissipation factor of 0.0009 at 10 GHz helps reduce energy loss as the signal travels through the board.
- Stable electrical behavior: Uniform electrical properties help support repeatable circuit performance across a wide frequency range.
- Low moisture absorption: Water absorption is listed as 0.02%, which helps support steadier electrical behavior in humid working conditions.
- Good fit for microstrip and stripline: These are common transmission structures in RF and microwave boards.
- Useful for low-loss signal paths: It fits antenna feeds, radar channels, and broadband circuits where insertion loss must be controlled.
What is the Dielectric Constant of Rogers RT Duroid 5880?
The dielectric constant of Rogers RT Duroid 5880 is 2.20 ± 0.02 at 10 GHz, with a design Dk of 2.20. This value is one of the main reasons the material is used in RF and microwave circuits.
Dk tells you how much the dielectric slows a signal compared with air. A lower Dk can support faster signal propagation and wider traces for a given impedance target.
Dk consistency also matters. If the dielectric constant shifts too much, the same trace width may not deliver the same impedance or phase behavior. This is why a stable RF laminate is valuable in antenna, radar, and communication boards.
How Thick is Rogers RT/Duroid 5880?
Rogers RT/Duroid 5880 is commonly available in dielectric thicknesses such as 0.005″, 0.010″, 0.020″, 0.031″, and 0.062″. These correspond to 0.127 mm, 0.252 mm, 0.508 mm, 0.787 mm, and 1.575 mm.
For RF circuits, thickness should be reviewed together with trace width, copper weight, impedance target, frequency, and stackup. A thinner dielectric can support compact RF layouts, while a thicker dielectric may allow wider impedance traces and fit some antenna structures better.
What Is the Loss Tangent of RT Duroid 5880?
The loss tangent of RT Duroid 5880 is 0.0009 at 10 GHz. Rogers also lists a dissipation factor of 0.0004 at 1 MHz for this material.
Loss tangent is also called dissipation factor. It shows how much signal energy is lost inside the dielectric material. A lower number means less dielectric loss.
This is important for long RF traces, antenna feed lines, radar circuits, microwave links, and broadband modules. Lower dielectric loss helps preserve signal strength and reduce insertion loss.
Rogers RT Duroid 5880 Specification & Datasheet Overview
The Rogers RT Duroid 5880 datasheet shows a low-Dk, low-loss PTFE composite laminate for high frequency PCB work. The table below focuses on practical values used during material review, stackup discussion, and fabrication planning.
| Item | Specification |
|---|---|
| Material Type | Glass microfiber reinforced PTFE composite |
| Design Dk | 2.20 |
| Process Dk | 2.20 ± 0.02 at 10 GHz |
| Dissipation Factor | 0.0009 at 10 GHz |
| Dissipation Factor at 1 MHz | 0.0004 |
| Thermal Coefficient of er | -125 ppm/°C |
| Volume Resistivity | 2 × 10⁷ Mohm |
| Surface Resistivity | 3 × 10⁷ Mohm |
| Moisture Absorption | 0.02% |
| Thermal Conductivity | 0.20 W/m/K |
| CTE X / Y / Z | 31 / 48 / 237 ppm/°C |
| Density | 2.2 g/cm³ |
| Copper Peel Strength | 31.2 pli / 5.5 N/mm |
| Flammability | UL94 V-0 |
| Lead-Free Process Compatible | Yes |
| Standard Copper Foil | 1/2 oz and 1 oz ED or rolled copper foil |
These values show why the material is widely considered for low-loss RF circuits. The most important points are its 2.20 design Dk, 0.0009 dissipation factor at 10 GHz, and 0.02% moisture absorption.
Where Is RT 5880 PCB Commonly Used?
RT 5880 PCB is commonly used in RF, microwave, antenna, radar, satellite communication, and broadband circuit applications. These products usually need low insertion loss, stable impedance, and repeatable signal behavior. Common uses include:
- RF antenna boards
- Microwave transmission circuits
- Radar front-end boards
- Satellite communication modules
- Broadband communication devices
- Point-to-point wireless radio antennas
- Millimeter-wave test circuits
- Low-loss feed networks
- Aerospace RF assemblies
- High frequency measuring fixtures
Rogers lists typical uses such as commercial airline broadband antennas, microstrip and stripline circuits, millimeter-wave applications, military radar systems, missile guidance systems, and point-to-point digital radio antennas.
RT 5880 PCB vs FR4: What Is the Difference?
RT 5880 PCB is made for low-loss high frequency circuits, while FR4 is mainly used for general electronic boards. FR4 remains practical for many products, but it is not the first choice when RF loss, Dk stability, and phase behavior are strict requirements.
| Item | RT 5880 PCB | FR4 PCB |
|---|---|---|
| Base Material | PTFE composite with glass microfiber | Epoxy glass laminate |
| Main Use | RF, microwave, antenna, radar, broadband circuits | General electronic circuits |
| Dielectric Constant | 2.20 design Dk | Usually higher and grade-dependent |
| Dielectric Loss | Very low | Higher at high frequency |
| Moisture Absorption | 0.02% | Usually higher than PTFE RF laminates |
| Fabrication Difficulty | Needs careful PTFE material handling | Easier for most PCB factories |
| Cost Level | Higher | Lower |
| Best Fit | Low-loss signal paths and RF stability | Cost-sensitive and standard circuits |
What Affects RT Duroid 5880 Price Per Square Foot?
RT Duroid 5880 price per square foot depends on laminate thickness, copper foil, copper weight, board size, layer count, tolerance, quantity, and testing needs. A fixed online number can be misleading because each PCB design has different production demands. Main price factors include:
- Dielectric thickness: Different thicknesses affect material cost and handling difficulty.
- Copper foil type: ED copper and rolled copper have different price levels.
- Copper weight: 1/2 oz, 1 oz, and heavier copper change both material and process cost.
- Board size: Larger boards affect panel use and yield.
- Layer count: Multilayer structures add lamination, registration, and inspection cost.
- Impedance control: Tight impedance tolerance may require coupons, review time, and testing.
- Hole structure: Small holes, dense drilling, slots, and tight routing add process time.
- Surface finish: ENIG, immersion silver, OSP, and other finishes have different costs.
- Testing needs: Electrical test, impedance test, and special inspection add cost.
- Material lead time: Laminate availability can affect both delivery and pricing.
For a more accurate quote, prepare Gerber files, stackup, dielectric thickness, copper weight, board size, quantity, surface finish, and impedance requirements.
What Should Be Controlled During RT 5880 PCB Fabrication?
RT 5880 PCB fabrication should control material handling, stackup, drilling, etching, surface finish, impedance, and final inspection. PTFE-based laminates are softer than many rigid PCB materials, so process discipline matters. Important control points include:
- Material verification: Confirm material grade, thickness, copper foil type, copper weight, and batch traceability.
- Clean handling: Avoid scratches, dents, stains, and copper surface contamination during panel movement.
- Stackup review: Confirm dielectric thickness, copper weight, layer count, bonding material, and finished thickness.
- Impedance calculation: Review trace width, spacing, dielectric height, copper thickness, and surface finish effect.
- Drilling control: Use proper drill tools, feed rate, stack height, and tool life control to reduce hole wall defects.
- Copper preparation: Use suitable cleaning methods because aggressive mechanical scrubbing may damage soft PTFE-based cores.
- Etching compensation: Adjust trace geometry to maintain final line width after etching.
- Surface finish selection: Choose a finish according to soldering needs, storage time, RF contact areas, and assembly process.
- Inspection and testing: Use AOI, electrical test, dimensional checks, and impedance testing when required.
How to Choose a Reliable RT 5880 PCB Manufacturer?
A reliable RT 5880 PCB manufacturer should understand high frequency materials, PTFE processing, stackup control, impedance control, and RF PCB inspection. This material is different from standard FR4, so the factory should have practical experience with Rogers high frequency laminates, not just general PCB production ability. When selecting a manufacturer, focus on these points:
- High frequency material experience: The factory should be familiar with Rogers laminates used in RF, microwave, antenna, radar, and communication boards.
- DFM review before production: Gerber files, stackup, line width, spacing, copper weight, drill size, and surface finish should be reviewed before fabrication. A clear DFM review helps reduce production risk before the board enters manufacturing.
- Material and thickness confirmation: The supplier should confirm material grade, dielectric thickness, copper foil type, copper weight, and batch traceability. For RF boards, material consistency directly affects signal performance.
- Impedance control ability: The factory should support impedance calculation, stackup review, and impedance testing when required. Stable impedance control helps maintain predictable RF transmission.
- Controlled drilling and etching: PTFE-based laminates need careful drilling and line width control. Good process control helps reduce hole defects, trace variation, and dimensional issues.
- Suitable surface finish selection: ENIG, immersion silver, OSP, tin, and other finishes may be used. The surface finish should match soldering needs, RF contact areas, storage time, and assembly process.
- Inspection and testing: AOI, electrical testing, dimensional inspection, and impedance testing should be available when needed. For high frequency PCB fabrication, visual inspection alone is not enough.
- PCB fabrication and PCBA support: If the project also needs assembly, a manufacturer with PCB fabrication, component sourcing, SMT assembly, testing, and final inspection can make the project easier to manage.
FAQs About RT 5880 PCB
Q1: Is RT 5880 a good material for antenna PCB designs?
A1: Yes. RT 5880 is often used for antenna PCB designs because it has a low dielectric constant and very low dielectric loss. Its design Dk is 2.20, which helps antenna traces and feed lines maintain more predictable RF behavior.
Q2: Can RT 5880 be used for multilayer PCB structures?
A2: Yes, it can be used in multilayer PCB builds, especially when the stackup needs low-loss RF layers. The bonding material, dielectric spacing, copper weight, and lamination process should be reviewed carefully before production.
Q3: What is the main difference between RT/duroid 5870 and 5880?
A3: RT/duroid 5870 and 5880 are related high frequency laminates, but their electrical values are different. RT/duroid 5870 has a design Dk of 2.33 and a dissipation factor of 0.0012 at 10 GHz. RT/duroid 5880 has a design Dk of 2.20 and a dissipation factor of 0.0009 at 10 GHz.
Q4: What copper foil is commonly used with RT 5880 material?
A4: RT 5880 is commonly supplied with electrodeposited copper or rolled copper. Standard copper claddings include 1/2 oz and 1 oz copper foil. The final selection depends on RF performance needs, line width control, current demand, and fabrication requirements.
Q5: Why does RT 5880 cost more than standard FR4?
A5: RT 5880 costs more because it is a specialty PTFE-based high frequency laminate. Price is affected by dielectric thickness, copper foil type, copper weight, board size, layer count, yield, testing needs, and material lead time.
Q6: What files are needed for an RT 5880 PCB quotation?
A6: A useful quotation usually needs Gerber files, stackup details, board size, quantity, copper weight, surface finish, dielectric thickness, impedance requirements, and testing requirements.
Q7: Which surface finish is suitable for RT 5880 PCB?
A7: ENIG, immersion silver, OSP, tin, and other finishes may be used. The right finish depends on soldering process, storage time, RF contact area, assembly method, and final application environment.
Q8: When should FR4 not be used instead of RT 5880?
A8: FR4 may not be suitable when the board needs low insertion loss, stable Dk, predictable phase behavior, or repeatable high frequency performance. For RF, microwave, radar, and antenna circuits, RT 5880 is often a better material choice.
Conclusion
RT 5880 is a strong material choice for high frequency PCB designs that need low loss, stable Dk, controlled impedance, and reliable RF performance. From antenna boards and radar modules to microwave circuits and broadband communication products, the final PCB result depends not only on the laminate itself, but also on stackup review, fabrication control, testing, and assembly quality.
Looking for a dependable partner for your RT 5880 PCB project? EBest can support high frequency PCB fabrication, DFM review, material confirmation, stackup guidance, impedance control, inspection, and PCBA assembly. Send your Gerber files, stackup, quantity, and technical requirements to sales@bestpcbs.com. Our team will review your project and provide a practical quotation for your next build.
