The five parameters that define Rogers 3003, what each one actually decides in a design, the six application areas it serves and the production controls that keep it consistent.
Rogers 3003 is a high-performance laminate used widely in high-frequency and high-speed circuit design. It earns its place in applications where the signal has to travel through the board with stable behaviour: communications, radar, satellite systems and precision microwave work. This article sets out the parameters that define the material, the fields where it is normally found, and the production considerations that go with using it.
Five figures carry most of the design weight, and each of them answers a different question. Dk and Df describe what the dielectric does to the signal, CTE and the operating temperature range describe how the material behaves physically and thermally, and the available dielectric thicknesses set the practical limits on the stack-up. It is worth noting that the value of a parameter lies as much in its stability as in the number itself: a Dk of 3.00 is only useful if it stays at 3.00 across the band and over temperature, which is what separates this class of material from an ordinary FR-4 board. For a broader view of where those figures come from, our notes on the RO3000 series are a useful complement.
| Parameter | Typical Value | What It Decides |
|---|---|---|
| Dielectric constant (Dk) | Approximately 3.00 at 10 GHz | Propagation delay and the physical size of the circuit for a given electrical length |
| Dissipation factor (Df) | Around 0.003 | How much signal energy is lost as heat, and therefore usable transmission distance |
| Coefficient of thermal expansion | Approximately 16 ppm/°C | Dimensional stability under temperature change, and stress on plated through-holes |
| Operating temperature range | −40°C to +125°C | Whether the material suits aerospace, automotive, military and outdoor equipment |
| Dielectric thickness | 0.2 mm to 1.5 mm, customisable | The impedance range a stack-up can reach and the mechanical stiffness of the board |
The figures above have specific consequences once they are used. A Dk near 3.00 sits in the middle of the high-frequency range, which is a deliberate position: it is low enough to keep delay and loss reasonable, and high enough that a given electrical length does not demand an impractical board size. It also gives designers a predictable basis for impedance, since the value does not wander much with frequency.
The dissipation factor of about 0.003 is the reason the material appears in long-link applications. At that level the signal reaches the far end with most of its energy intact, which is what allows radar and satellite systems to work at the ranges they do. A CTE of roughly 16 ppm/°C keeps dimensional change small across the temperature swing of a typical operating environment, and the −40°C to +125°C range covers the conditions that consumer-grade substrates are not built for. The combination is what makes the material a routine choice for high-frequency designs that need stable attenuation, and the contrast with other grades is set out in our comparison of RO3003 and RO4003 performance.
The electrical properties and mechanical strength of the material place it in six main fields, and in each of them the reason is slightly different.
The material is used extensively in wireless and satellite communication equipment. Its low dissipation factor is what keeps attenuation and distortion small over long signal paths, which matters more as bandwidth increases. The millimeter-wave end of that spectrum is covered in more detail in our article on RO3003 in millimeter-wave applications.
Radar depends on precision and stability. A low-loss material with stable electrical behaviour reduces the attenuation and interference that would otherwise blur a return signal, which is why it appears in both civilian and defence radar hardware.
Satellite systems require substrates that work at high frequency and across a wide temperature range, often with no possibility of service. Thermal stability combined with a low dissipation factor is what makes the material suitable for ground station antennas and payload electronics alike.
In microwave circuits the advantage is the same one that matters elsewhere: low loss. The material is common in microwave amplifiers, filters and test hardware, where its electrical properties and predictable behaviour reduce design uncertainty.
As vehicles acquire more radar, navigation and driver assistance functions, the demand for high-frequency boards grows with it. The material’s combination of high-frequency capability and mechanical stability suits the vibration and temperature profile of an automotive environment.
High-precision imaging and monitoring equipment relies on stable signal behaviour, because the measurement is only as good as the board that carries it. Consistent dielectric properties and good mechanical strength make the material a natural fit for those systems.
Making the most of the material means understanding how it is built and what has to be controlled.
Rogers 3003 combines ceramic fillers with glass fibre and resin. The ceramic filler carries the electrical performance, while the glass fibre and resin provide mechanical strength and thermal stability. That composition is what allows the material to hold its properties under high-frequency, high-speed and high-temperature conditions, which a conventional laminate cannot do.
Production involves precise lamination, thermal pressing and post-processing, with temperature and pressure control deciding the consistency of both the electrical figures and the physical dimensions. Lamination is the step that delivers uniform thickness across the panel, and it is where the difference between a good and an average board is usually decided. The same discipline runs through how RO3000 laminates are constructed with rolled copper.
Each batch is tested against dielectric constant, dissipation factor, mechanical strength and other performance requirements before release. In a material intended for high-frequency work, that testing is what converts a datasheet figure into something a designer can rely on, because the risk is not a low average value but a batch that sits outside the expected band.
The material supports customised production to customer specification, including adjustments to thickness, panel size and other properties. That flexibility is what allows one platform to serve designs with quite different impedance and mechanical requirements, rather than forcing a compromise in the stack-up.
Rogers 3003 is a laminate built for high-frequency and high-speed work, and its value comes from the combination of a low dissipation factor, a stable dielectric constant and thermal behaviour that holds up outside a laboratory. Those properties place it in high-frequency communication, radar, satellite, microwave and automotive systems, and in medical equipment where measurement accuracy depends on the board. As demand for high-frequency electronics continues to grow, the parameters described here will keep determining which designs the material can serve. A comparison with a similarly positioned grade from another supplier is available in our article on Taconic RF-35 parameters.
Frequently Asked Questions
A dielectric constant of approximately 3.00 at 10 GHz, a dissipation factor of around 0.003, a coefficient of thermal expansion near 16 ppm/°C, an operating range from −40°C to +125°C and dielectric thicknesses from 0.2 mm to 1.5 mm.
It balances two competing needs. A lower value would reduce delay and loss further but enlarge the circuit for a given electrical length, so a mid-range figure keeps the board a practical size while still supporting low-loss operation.
It allows the material into aerospace, automotive, military and outdoor equipment, where a consumer-grade substrate would drift outside its specified behaviour. That range is what turns the electrical figures into usable performance in the field.
It sets both the impedance a stack-up can reach and the mechanical stiffness of the board. Thicker dielectric supports a given impedance with less sensitivity to manufacturing tolerance and is easier to handle, while thinner material suits compact multilayer designs.
Because a high-frequency design assumes a narrow dielectric constant band. Testing Dk, Df and mechanical properties batch by batch is how a designer knows the material delivered matches the value the impedance calculation used.
Send us your frequency range, impedance targets and operating environment and we will confirm whether 3003 is the right grade for the stack-up.
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