In modern automotive electronics, high-frequency communication, and smart devices, RF connectors play a crucial role in ensuring stable signal transmission. The design, material selection, and electrical performance of these connectors directly influence the reliability of the system. Among them, FAKRA series coaxial connectors are widely recognized for their suitability in high-frequency applications, especially in board-end RF interface scenarios. The Kinghelm KH-2FK1-A-SM-101 board-end FAKRA antenna connector exemplifies a well-engineered solution for these demanding applications.

Kinghelm KH-2FK1-A-SM-101 Product Image

Application Background of Board-End FAKRA RF Connectors

As RF systems continue to move toward higher frequencies, the demand for impedance consistency, signal integrity, and environmental resilience in connectors has increased. FAKRA interfaces were initially developed for automotive RF standards and offer reinforced mechanical structures to withstand vibration, temperature variations, and challenging working conditions. Board-end FAKRA connectors primarily serve as the link between PCB-mounted circuits and external antennas or cables, making them an essential interface in vehicle infotainment systems, communication modules, and embedded RF units.

The KH-2FK1-A-SM-101 is a black, 180° male board-end FAKRA antenna connector with an inner pin interface. Its design allows for right-angle mounting in compact spaces, optimizing routing direction while minimizing interference with nearby components.

Structure and Installation

This model features a plug-in configuration, which provides mechanical stability and reliable soldering performance in environments subject to vibration. Tray packaging ensures easier identification and handling during bulk assembly.

The straight-leg design allows the pins to insert vertically into PCB holes, improving solder wetting and joint consistency. This configuration is commonly used in RF modules, control units, and signal distribution boards.

RF Performance and Material selection

Electrically, the KH-2FK1-A-SM-101 is designed with a 50Ω impedance to match standard RF systems, reducing signal reflection and loss. It operates effectively within the 0–6 GHz frequency range, accommodating both low-frequency control signals and mid-to-high frequency communication signals.

The connector’s dielectric material, PTFE (PTEE), offers stable dielectric properties and supports consistent signal transmission with minimal phase distortion. Its temperature resilience ensures proper performance across a wide operating range of -40°C to +105°C, suitable for applications exposed to significant temperature variation.

Environmental Adaptability and Reliability

Beyond electrical characteristics, environmental adaptability is a key consideration. The KH-2FK1-A-SM-101 operates reliably across temperature fluctuations commonly encountered in automotive and industrial electronics. The FAKRA interface also includes unique coding to prevent misconnection during assembly, which is particularly valuable in systems with multiple interfaces.

Typical Applications

Board-end FAKRA connectors like the KH-2FK1-A-SM-101 are often applied in:

• Automotive systems connecting GPS, wireless communication, or infotainment antennas;

• Communication equipment linking RF modules with external signal units;

• Embedded electronics as high-frequency signal input/output interfaces;

• Test and measurement equipment creating stable RF signal pathways.

The 180° board-end design and inner pin interface provide good adaptability across these applications, enabling seamless integration into various RF system designs.

selection and Design Considerations

When selecting RF connectors, engineers should consider interface type, frequency range, mounting style, and system layout. For board-end FAKRA connectors, maintaining impedance control in PCB traces is critical to minimize signal discontinuities.

Plug-in designs also require precise hole sizing and proper soldering space to ensure assembly quality. Proper consideration during the design stage enhances long-term reliability and performance.

Kinghelm KH-2FK1-A-SM-101 Specification

Conclusion

As RF technology becomes increasingly integrated into electronic systems, board-end RF connectors like the Kinghelm KH-2FK1-A-SM-101 play a vital role in stable signal transmission. With its 50Ω impedance, 0–6 GHz frequency compatibility, and wide temperature range, this FAKRA board-end antenna connector meets diverse application needs.

selecting and using these connectors appropriately contributes to system stability, reliable performance, and simplified maintenance, forming a strong foundation for advanced RF designs.

About Kinghelm

Shenzhen Kinghelm Electronics Co., Ltd.（www.kinghelm.net）has technical backbones from Tsinghua University and UESTC, and has introduced overseas returnee professionals. Kinghelm is able to develop highly reliable and high-performance antenna and connector products.KH series products of "Kinghelm" brand include Beidou/GPS antennas, RF adapter connectors, plug connector, electrical data connectors, terminals, and customized vehicle harnesses, industrial / medical connectors, and special antenna connectors."Kinghelm connects world", Kinghelm has grown with the development of China's Beidou industry. Starting from supplying Beidou/GPS dual mode antennas, IPEX terminals, and RF adapter cables for automotive manufacturers, Kinghelm has continuously developed products. Currently, it has a series of WiFi, Bluetooth, NB-loT, LoRa, Zigbee, UWB, and GSM antennas, RFID tags, RF adapter cables, standard microwave antennas, vehicle grade SMA, SMB, FAKRA holders, coaxial cables, and can customize non-standard antenna connectors based on customer drawings or samples.