2-Layer RO4725JXR PCB: 0.8mm Thick, 30.7mil Core, and ENIG Finish
for Antenna Applications
(All PCBs are custom-manufactured. Reference images and parameters
may vary based on your design requirements.)
Overview of the 2-Layer RO4725JXR PCB
The 2-layer RO4725JXR PCB is a cost-effective, high-performance
printed circuit board designed specifically for antenna-grade
applications. Manufactured using Rogers RO4725JXR
hydrocarbon/ceramic laminate, this PCB offers low dielectric loss,
consistent circuit performance, and reduced passive intermodulation
(PIM). With a finished thickness of 0.8mm, immersion gold surface
finish, and rigid structure, this PCB is optimized for cellular
base station antennas and other demanding RF systems.
Fully compatible with standard FR-4 processes, the RO4725JXR PCB
eliminates the need for specialized handling, making it an
affordable alternative to PTFE-based laminates without compromising
performance.
PCB Construction Details
The 2-layer rigid PCB is engineered with precision to ensure
durability and superior signal performance. Below are the
construction details:
| Parameter | Specification |
| Base Material | Rogers RO4725JXR |
| Layer Count | 2 layers |
| Board Dimensions | 53mm x 79mm ± 0.15mm |
| Minimum Trace/Space | 4/7 mils |
| Minimum Hole Size | 0.3mm |
| Blind Vias | No |
| Finished Thickness | 0.8mm |
| Copper Weight | 1oz (1.4 mils) outer layers |
| Via Plating Thickness | 20 μm |
| Surface Finish | Immersion Gold (ENIG) |
| Top Silkscreen | None |
| Bottom Silkscreen | None |
| Top Solder Mask | None |
| Bottom Solder Mask | None |
| Electrical Testing | 100% tested prior to shipment |
PCB Stackup
| Layer | Material | Thickness |
| Copper Layer 1 | Copper (1oz) | 35 μm |
| Core Material | Rogers RO4725JXR | 0.78mm (30.7mil) |
| Copper Layer 2 | Copper (1oz) | 35 μm |
This straightforward stackup design ensures low insertion loss and
stable signal propagation, making it ideal for RF applications.
PCB Statistics
The 2-layer RO4725JXR PCB is designed to meet the needs of simple
but effective component layouts. Below are its key statistics:
- Components: 6
- Total Pads: 39
- Thru Hole Pads: 31
- Top SMT Pads: 8
- Bottom SMT Pads: 0
- Vias: 20
- Nets: 2
Introduction to RO4725JXR Material
Rogers RO4725JXR laminates are a hydrocarbon/ceramic composite
reinforced with woven glass, designed to provide antenna-grade
performance at a lower cost compared to PTFE-based laminates. The
material’s low dielectric constant (Dk) and low loss tangent (Df)
ensure minimal signal loss and consistent electrical performance.
RO4725JXR materials are fully compatible with FR-4 processes,
eliminating the need for special handling or through-hole
preparation. Additionally, the material’s low passive
intermodulation (PIM) performance ensures superior signal quality
in cellular base station antennas.
Features of RO4725JXR
- Dielectric Constant (Dk): 2.55 ± 0.05 at 10GHz/23°C
- Dissipation Factor (Df):
- 0.0026 at 10GHz/23°C
- 0.0022 at 2.5GHz
- Thermal Coefficient of Dielectric Constant (TCDk): +34 ppm/°C
- CTE (Coefficient of Thermal Expansion):
- X-axis: 13.9 ppm/°C
- Y-axis: 19 ppm/°C
- Z-axis: 25.6 ppm/°C
- High Tg Value: >280°C
- Low PIM Performance: -166 dBc (43dBm, 1,900MHz signal)
Benefits of RO4725JXR PCB
Low Dielectric Loss: Ensures minimal signal attenuation for
high-frequency applications.
Consistent Circuit Performance: Dk and Df values are stable across
wide frequency ranges.
Low Passive Intermodulation (PIM): Improves signal quality in
antenna systems.
Cost-Effective Alternative: Matches PTFE-based materials in
performance without the high cost.
Thermal Stability: High Tg and CTE matched to copper enhance
durability during operation.
Applications of RO4725JXR PCB
Cellular Base Station Antennas: Delivers reliable signal performance and low PIM.
Point-to-Point Communication Systems: Supports low-loss and high-gain applications.
Microwave and RF Systems: Ensures consistent performance for high-frequency circuits.
Satellite Communication Systems: Provides thermal and electrical stability in demanding
environments.
Why Choose the 2-Layer RO4725JXR PCB?
The 2-layer RO4725JXR PCB combines optimal performance, cost
efficiency, and easy manufacturability, making it an excellent
choice for antenna-related applications. With its low dielectric
constant, low dissipation factor, and superior thermal properties,
this PCB ensures long-lasting performance in high-frequency
environments.
Contact us today to learn more about this high-performance PCB or
to discuss your project requirements!
