RO4725JXR PCB 60.7mil Substrate Double-layer Circuit Board
This 2-layer rigid PCB adopts Rogers RO4725JXR, a hydrocarbon/ceramic/woven glass antenna grade laminate. It is specifically engineered to reliably meet the stringent requirements for high-frequency signal transmission in precision RF application scenarios, particularly suitable for cellular base station antenna applications.
PCB Specifications
| Parameter | Details |
| Layer Count | 2-Layer (rigid structure) |
| Base Material | Rogers RO4725JXR |
| Board Dimensions | 115.1mm × 66.3mm per piece (1PCS), tolerance ±0.15mm |
| Minimum Trace/Space | 5 mils (trace) / 6 mils (space) |
| Minimum Hole Size | 0.3mm |
| Vias | No blind vias; Total vias: 131; Via plating thickness: 20 μm |
| Finished Board Thickness | 1.62mm |
| Finished Copper Weight | 1oz (1.4 mils) for outer layers |
| Surface Finish | Immersion Gold |
| Silkscreen | No silkscreen on top layer; No silkscreen on bottom layer |
| Solder Mask | No solder mask on top layer; No solder mask on bottom layer |
| Quality Assurance | 100% electrical test conducted prior to shipment |
PCB Stack-up
| Layer Name | Material | Thickness |
| Top Copper Layer (Copper_layer_1) | Copper | 35 μm |
| Substrate Core | Rogers RO4725JXR Core | 1.542mm (60.7 mil) |
| Bottom Copper Layer (Copper_layer_2) | Copper | 35 μm |
Rogers RO4725JXR Material Introduction
Rogers RO4725JXR Hydrocarbon / Ceramic / Woven Glass antenna grade laminates are a reliable, low-cost alternative to conventional PTFE-based laminates. The resin systems of RO4725JXR dielectric materials provide the necessary properties for ideal antenna performance. RO4725JXR antenna grade laminates are fully compatible with conventional FR-4 and high temperature lead-free solder processing.
These materials do not require the special treatment needed on traditional PTFE-based laminates for plated through-hole preparation. RO4725JXR laminates are an affordable alternative to conventional PTFE-based antenna materials, allowing for designers to optimize cost and performance. They have the mechanical and electrical properties that antenna designers need, with values that allow antenna designers to realize substantial gain values while minimizing signal loss.
Key Material Features
| Feature | Specification/Description |
| Material Composition | Rogers RO4725JXR Hydrocarbon / Ceramic / Woven Glass antenna grade laminate |
| Dielectric Constant (Dk) | 2.55 ± 0.05 at 10 GHz/23°C |
| Dissipation Factor | 0.0026 at 10 GHz/23°C; 0.0022 at 2.5 GHz |
| Thermal Coefficient of Dielectric Constant | +34 ppm/°C |
| Coefficient of Thermal Expansion (CTE) | X axis: 13.9 ppm/°C; Y axis: 19 ppm/°C; Z axis: 25.6 ppm/°C (matched to copper) |
| Glass Transition Temperature (Tg) | >280 °C |
| Passive Intermodulation (PIM) Value | -166 dBC |
| Surface Finish Advantage | Immersion Gold ensures excellent solderability, corrosion resistance and reliable bonding performance |
Core Benefits
Low-Loss Performance: Low-loss dielectric with low-profile foil, minimizing signal attenuation.
Low Insertion Loss: Ensures efficient high-frequency signal transmission and integrity.
Dk Compatibility: Dk matched to standard PTFE antennas, facilitating design compatibility.
Reduced PIM: Low passive intermodulation, avoiding interference and enhancing system reliability.
Consistent Circuit Performance: Stable electrical/mechanical properties for reliable operation.
Excellent Process Compatibility: FR-4 and lead-free solder compatible, no special through-hole treatment.
Cost-Effective Solution: Affordable alternative to PTFE laminates, optimizing cost-performance.
Quality Standard & Availability
Quality Standard: Complies with IPC-Class-2, ensuring consistent quality via rigorous process control and 100% electrical verification before shipment.
Availability: Globally available, enabling timely delivery and efficient after-sales support for international customers.
Typical Applications
Cellular Base Station Antennas
Summary
This 2-layer rigid PCB based on Rogers RO4725JXR substrate is a high-performance, cost-effective solution tailored for commercial microwave and RF applications, especially cellular base station antennas.
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