China High-Quality RF & Microwave PCBs from China Suppliers - Precision Impedance Control for ≥500MHz Frequency Supplier, Companies
Product Description
1. Sheet Material Selection
Never use ordinary FR-4. High-frequency dedicated boards with low loss and stable dielectric constant (such as Rogers RO4350B, RT/duroid series) must be selected. This is the cornerstone of performance.
2. Impedance & Transmission Lines
Precise 50Ω impedance control is essential. Use microstrip lines, striplines or coplanar waveguides and determine the precise line width through calculation/simulation. When laying out, minimize the paths and avoid right angles.
3. Grounding & Isolation / Strict Zoning
Provide a complete and solid ground plane to ensure a low-impedance return path. Densely arrange grounding vias to suppress resonance and coupling. Physically isolate the RF, digital, and power supply areas. Use shielding covers and via walls when necessary.
High-Precision Processing
Strictly control the tolerance of line width and medium thickness to ensure consistent signal performance across the board.
Surface Treatment
ENIG gold plating is preferred to ensure flatness and high-frequency conductivity, providing reliable signal transmission.
Solder Mask Control
The solder mask layer may affect the impedance, and "window opening" treatment is often adopted for RF traces to maintain signal integrity.
RF PCBs play a very significant role in modern wireless communication devices, and an increasing number of customers are choosing such products.
