RF Connector Cable, Wire Harness Assemblies China Supplier

RF connectors and cables are core components for high-frequency signal transmission. RF connectors and cables are core components in the fields of wireless communication, rumfart, military equipment, etc., and their technological development is closely related to application scenarios. The following is an explanation from the aspects of structural characteristics, connection methods, application fields and technological progress:

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1. Main types and structural characteristics:
‌RF coaxial connector‌
It includes a center conductor and an outer shielding layer. The center conductor transmits signals, and the outer shielding layer provides EMI/RFI protection and serves as a signal loop.

Typical applications include base station antenna connection, test equipment interface, etc. Among them, the voltage standing wave ratio of SMA and TNC series products in the aerospace field can reach 1.25, and their performance is better than similar international products.

‌RF coaxial cable‌
It is divided into semi-rigid and flexible types. The center conductor is made of copper-plated silver or alloy material, and the outer shielding layer is braided or wound to achieve high-frequency shielding.
The millimeter wave cable connector can improve the plug-in efficiency by more than 50% through the optimization of elastic claws and bulge structure, which is suitable for laboratory rapid debugging scenarios.

‌Special Type Connectors‌
Twinaxial cables contain three conductors and are suitable for differential signal transmission; welding connectors are suitable for semi-rigid cables, while crimping connectors are suitable for flexible cables.

2. Signal Transmission and Interconnection
‌High-Frequency Signal Transmission‌
RF connectors establish a stable high-frequency signal transmission channel through the synergy of the inner conductor (copper or copper alloy) and the outer conductor (shielding layer), ensuring the accurate transmission of RF signals between wireless communication devices. For example, when the base station is connected to the antenna, the RF connector is required to achieve directional transmission of electromagnetic wave signals.

‌Equipment Module Interconnection‌
As a mechatronic component, the RF connector can connect equipment modules such as transmitters, receivers, and filters to build a complete communication link, such as the internal module interconnection of satellite communication systems.

Application Field Expansion
‌Aerospace‌: Aerospace-grade products need to pass extreme environmental tests such as thermal vacuum outgassing and irradiation, and use titanium alloy shells and special dielectric materials to improve space adaptability.
‌5G/6G Communication‌: Millimeter wave connectors support frequency bands above 40GHz, and the 2025 Shanghai exhibition will focus on displaying new energy connectors and automated testing equipment.
‌Military Equipment‌: Domestic military RF connectors achieve full-band coverage, and Shaanxi Huada and other companies are gradually transforming into system solution providers.

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3. Impedance matching and signal integrity
‌Maintaining characteristic impedance‌
The standardized design of RF connectors and coaxial cables (50Ω or 75Ω) ensures transmission line impedance matching and avoids energy loss caused by signal reflection. Especially in 5G/6G millimeter wave band applications, precise impedance control is critical to signal fidelity.

‌Reduce signal attenuation‌
By optimizing materials (such as copper-plated silver conductors) and structures (multi-layer shielding layers), RF cables can reduce signal insertion loss and attenuation and improve long-distance transmission efficiency.

4. System performance improvement
‌Electromagnetic compatibility guarantee‌
The outer shielding layer suppresses electromagnetic interference (Emi) and radio frequency interference (RFI) through braiding/winding processes to ensure the stability of signal transmission. For example, three coaxial connectors are superior to ordinary coaxial types in scenarios with high shielding requirements.

‌Enhanced environmental adaptability‌
Connectors with titanium alloy shells or special dielectric materials can maintain performance in extreme temperatures, vacuum or irradiation environments to meet the needs of aerospace applications.

Technology development trends
‌High frequency‌: The design of millimeter wave connectors is optimized and increased to 110GHz application range.
‌High reliability‌: Aerospace products have been verified through life enhancement tests, with an average failure-free time of more than 100,000 plug-in and pull-out times7.
‌Intelligent manufacturing‌: TYPE-C welding/testing equipment and automated assembly lines promote mass production efficiency by 20%-30%.

5. Diversified application adaptation
‌Scenario-based adaptation design‌
‌Coaxial connector‌: Suitable for TEM wave transmission, such as base station antenna connection;
‌Triaxial connector‌: For medical or military equipment with high shielding requirements;
‌Dual-core symmetrical connector‌: Supports digital signal transmission and is suitable for industrial control fields.

‌Flexibility in installation methods‌
Welded connectors provide high-reliability fixed connections, while crimping and elastic snap-on structures are suitable for high-frequency plug-in or quick installation scenarios.

Welding type: high reliability fixed connection, high strength, excellent shielding continuity.
Crimp type: quick installation/flexible cable, easy operation, special tools required for calibration.
Elastic buckle structure: high frequency plug-in and pull-out scenarios, plug-in and pull-out time is shortened by 30%, and labor costs are reduced.
Through the above functions, RF connectors and cables play a key technical support role in wireless communications, rumfart, military equipment and the Internet of Things.