1. Overview

RF/IF (Radio Frequency/Intermediate Frequency) and RFID (Radio Frequency Identification) systems require effective electromagnetic interference (EMI) and radio frequency interference (RFI) shielding to maintain signal integrity. Contacts, fingerstock, and gaskets are critical components for ensuring electrical continuity and shielding performance in electronic enclosures. These components prevent electromagnetic leakage while maintaining mechanical functionality in connectors, housings, and assemblies.

2. Main Types and Functional Classification

3. Structure and Composition

Typical structures include:

• Contacts: Beryllium copper or phosphor bronze cores with conductive platings (gold, silver, nickel)
• Fingerstock: Canted coil springs or stamped metal fingers with corrosion-resistant coatings
• Gaskets: Silicone rubber with embedded silver-aluminum particles or wire mesh

4. Key Technical Parameters

5. Application Fields

Main industries include:

• Telecommunications (5G base stations, microwave links)
• Automotive (V2X communication systems, radar sensors)
• Aerospace (avionics shielding compartments)
• Medical (MRI shielding enclosures)

6. Leading Manufacturers and Products

7. Selection Recommendations

Considerations include:

• Frequency range of the application (higher frequencies require tighter tolerances)
• Environmental conditions (temperature, humidity, chemical exposure)
• Material compatibility (avoid galvanic corrosion between mating surfaces)
• Cost-effectiveness (balance performance vs. budget constraints)

Case Study: In automotive radar systems, Parker Chomerics' silicone-based gaskets reduced EMI leakage by 40% compared to traditional metal fingerstock.

8. Industry Trends

Key development directions:

• Miniaturization for 5G mmWave applications
• Low-PIM (Passive Intermodulation) material formulations
• Multi-functional integration with thermal management
• RoHS-compliant plating processes (eliminating hexavalent chromium)