Rogers RO4725JXR Substrate High Frequency Laminates Copper Clad Sheet

RO4725JXR antenna-grade laminates offer a reliable, high-performance alternative to conventional PTFE-based materials, combining excellent electrical characteristics with enhanced processability.

Engineered specifically for antenna applications, RO4725JXR laminates deliver the precise electrical and mechanical properties designers require. With a dielectric constant (Dk) of 2.55 and a low loss tangent (Df) of just 0.0022 at 2.5 GHz (using LoPro® reverse-treated ED copper foil), these materials enable substantial antenna gain while minimizing signal loss. Additionally, they demonstrate exceptional low PIM performance, consistently achieving values below -160 dBc (tested with a 43dBm, 1900 MHz signal).

Unlike traditional PTFE-based laminates, RO4725JXR requires no special plated through-hole preparation and is fully compatible with conventional epoxy processing and high-temperature lead-free soldering. Lamination is readily achieved using RO4400™ bondply series at 175°C. The specially formulated thermoset resin system in RO4700JXR materials is designed to meet the demanding needs of modern antenna designs, featuring a glass transition temperature exceeding 280°C (536°F). This high Tg ensures low Z-axis CTE, excellent plated through-hole reliability, and seamless lead-free solder processability.

Features and Benefits

RO4700 Series Laminates – Low Loss Dielectric with Low Profile Foil
- Reduced PIM for superior signal integrity
- Low insertion loss for enhanced efficiency
- RO4725JXR: Stable Dk of 2.55

Unique Filler / Closed Microspheres
- Low density for reduced weight
- 30% lighter than PTFE/glass materials

Low Z-axis CTE (<30 ppm/°C) & High Tg (>280°C)
- Design flexibility for complex architectures
- Compatible with automated assembly processes

Low TCDk (<40 ppm/°C)
- Consistent circuit performance across temperature variations

Specially Formulated Thermoset Resin System
- Low TCDk for stable electrical performance
- Precise 2.55 Dk control
- Ease of fabrication with standard processes
- Robust PTH process capability

Environmentally Friendly
- Lead-free process compatible
- RoHS compliant

Typical Applications
- Cellular base station antennas