Very-Low-Loss Woven-Glass PTFE Laminate
FJY220A-M
Low-Dk RF material for efficient transmission and stable high-volume processing
FJY220A-M is a copper-clad, woven-glass-reinforced PTFE laminate developed for RF, microwave and millimeter-wave circuits requiring very low dielectric loss, low moisture absorption and repeatable electrical performance. It is positioned for designs currently using Rogers DiClad 880 or Taconic TLY-5.
Key Performance
Designed around the electrical and mechanical variables that determine RF yield
FJY220A-M supports repeatable high-frequency performance from PCB fabrication through field operation.
Very Low Dielectric Loss
A typical Df of 0.0009 at 10 GHz helps limit attenuation in antennas, feed networks and long microwave transmission paths.
Low-Dk Design Freedom
The 2.20 dielectric platform supports wider transmission lines, helping reduce conductor loss and improve fabrication tolerance.
Stable Woven-Glass Construction
Lightweight glass reinforcement improves handling and dimensional stability compared with nonwoven or chopped-fiber PTFE systems.
Low Moisture Uptake
Low water absorption helps preserve dielectric performance in outdoor communication, aerospace and humid-service environments.
Typical Technical Data
Core properties for initial material evaluation
Use these typical values for preliminary comparison and request the current product data sheet before final stack-up release.
| Property | Typical value / positioning | Design relevance |
|---|---|---|
| Dielectric constant (Dk) | 2.20 class at 10 GHz | Impedance geometry, phase velocity and circuit size |
| Dissipation factor (Df) | 0.0009 | Dielectric attenuation and RF power efficiency |
| Moisture absorption | 0.02% | Electrical stability in humid operating environments |
| Thermal conductivity | 0.22 W/m·K | Heat transfer through the dielectric |
| CTE, X / Y / Z | 26 / 15 / 217 ppm/°C | Registration, thermal cycling and PTH reliability |
| Material construction | PTFE + lightweight woven glass | Electrical stability, handling and fabrication behavior |
Values are typical design references, not guaranteed specification limits. Final material substitution requires review of the current data sheet, copper configuration, thickness tolerance, PCB process and application-level validation.
Typical Applications
Application areas aligned with the material’s dielectric and thermal profile
Base-station and small-cell antennas
Satellite communication and LNB/LNA modules
77 GHz radar and mmWave antenna structures
Microwave filters, couplers and feed networks
Low-PIM RF assemblies
PTFE / FR-4 hybrid multilayer PCBs
Material Selection
When to specify FJY220A-M
Choose FJY220A-M when the design priority is the lowest practical transmission loss in a 2.20 Dk woven-glass PTFE platform, together with strong dimensional control and production-ready handling.
Selection reference
Evaluate the complete construction—not Dk alone—when qualifying a second source or migrating an established RF design.
- Jiuyao material
- FJY220A-M
- Comparable design class
- Rogers DiClad 880 / Taconic TLY-5
- Primary value
- Very low loss and low Dk
- Validation
- Stack-up + prototype + RF test
Start a Material Review
Evaluate FJY220A-M for your next RF design
Send your operating frequency, target impedance, core thickness, copper type, panel format and thermal environment. Our technical team will recommend a suitable configuration and sampling plan.