Products Description
Rogers 4350B is a high performance HF circuit board material manufactured by Rogers Corporation and is especially suited for high performance applications such as wireless and radar from 500 MHz to 77 GHz. Below are some of the key characteristics, application areas, and processing requirements for Rogers 4350B RF high frequency PCBs:
Rogers 4350B Microwave HF PCB Characteristics:
Stable Dielectric Constant (Dk): 3.48 ensures consistent signal propagation over a wide frequency range.
Low Loss Factor (Df): 0.0037 at 10 GHz, helping to minimize signal attenuation during propagation.
Tight Dielectric Constant Tolerance: ±0.05, resulting in very consistent material performance from batch to batch.
Low Z-axis Coefficient of Thermal Expansion (CTE): 41 ppm/°C, which helps maintain dimensional stability during thermal cycling and reduces reliability risks due to thermal expansion.
High Thermal Conductivity: 0.69 W/m/K, which helps diffuse heat in high-frequency, high-power applications and prevents component hot spots.
Lead-free Compatible Processing: Able to withstand lead-free soldering processes up to 260°C.
Excellent Mechanical Strength: Excellent dimensional stability and flexural strength due to braided glass fiber reinforcement.
Good chemical resistance.
UL 94 V-0 flame retardant rating.
High Breakdown Voltage: 1.5 kV/mil, reducing the risk of electrical breakdown in thin dielectric layers.
Rogers 4350B Microwave High Frequency PCB Applications:
5G base stations and user equipment.
Radio transceivers and receivers.
Satellite communication systems.
Wireless infrastructure.
Radar and automotive sensors.
Test and measurement equipment.
Aerospace and defense electronics.
High-speed data links and backplanes.
Medical diagnostic equipment.
Rogers 4350B Microwave HF PCB Processing Requirements:
Accurate Impedance Control: Use an impedance calculator to size transmission lines.
Consideration of Frequency Dependent Dk: Include the effect of frequency changes on Dk in the model.
Include Shim and Counter-shim Shapes: Consider these factors in impedance calculations.
Model Discontinuities: Such as stubs, vias, and bends.
Use Tear Drop Shaped Shims on Vias: Improve reliability.
Minimize Copper Area Exposed to Dielectric: To reduce losses.
Watch for resin starvation, voids, and thickness variations.
Limit Glass Braid Skew: Within 5 degrees.
Consider Dk and etch tolerances in the impedance budget.
These features of the Rogers 4350B make it ideal for high-performance RF circuit design, especially in microwave frequency radio systems that require precise electrical characterization.
