Rogers Impedance Calculator
RO4350B | RO4003C | RT/duroid | RO3000
Calculate trace width and impedance for Rogers high-frequency PCB materials. Low-loss, stable Dk laminates for RF, microwave, and high-speed digital applications where FR4 isn't sufficient.
Popular Rogers Materials
| Material | Dk @ 10 GHz | Df @ 10 GHz | Typical Use |
|---|---|---|---|
| RO4350B | 3.48 ±0.05 | 0.0037 | General RF, wireless |
| RO4003C | 3.38 ±0.05 | 0.0027 | High-performance RF |
| RO3003 | 3.00 ±0.04 | 0.0013 | Automotive radar |
| RT/duroid 5880 | 2.20 ±0.02 | 0.0009 | High-frequency, mmWave |
When to Use Rogers Materials
RF & Microwave
Antenna design, filters, couplers, and power amplifiers above 1 GHz where FR4 loss is unacceptable. Essential for wireless infrastructure and satellite communications.
Automotive Radar
77 GHz automotive radar systems require ultra-low-loss materials with stable Dk. Rogers RO3003 and similar are industry standards for ADAS applications.
High-Speed Digital
Long high-speed traces (PCIe 4.0+, 25G+ SerDes) where FR4 loss budgets are exceeded. Hybrid stackups with Rogers and FR4 are common.
Rogers vs FR4 Comparison
Rogers Advantages
Considerations
Rogers Design Guidelines
Impedance Calculation
- • Use manufacturer's Dk at your operating frequency
- • Rogers provides precise data sheets with Dk vs frequency
- • Dk is stable, so calculations are more accurate than FR4
- • Trace widths will differ from FR4 due to lower Dk
Hybrid Stackups
- • Use Rogers for RF/high-speed layers only
- • FR4 for power/ground and low-speed signals
- • Reduces cost while maintaining performance
- • Work with fab on bonding and registration
Calculate Rogers Trace Dimensions
Use our impedance calculator with Rogers Dk values. RO4350B: Dk=3.48, RO4003C: Dk=3.38. Get precise trace widths for your high-frequency design.
Rogers FAQ
Which Rogers material should I use?
RO4350B is the most common for general RF (good balance of performance/cost). RO4003C for higher performance. RT/duroid for mmWave. Check Rogers selection guides.
How much more does Rogers cost?
Typically 5-20x more than FR4, depending on material and quantity. Hybrid stackups (Rogers + FR4) reduce costs significantly.
Can any fab process Rogers?
No. Rogers requires special processing knowledge. Work with fabs experienced in high-frequency materials. Many prototype fabs don't offer it.
What Dk should I use in calculations?
Use the Dk value at your operating frequency from Rogers data sheets. Unlike FR4, Rogers provides precise Dk data for different frequencies.
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