KH-IPEXA-SMAKWE5-B50H RF Cable Assembly: Compact, Reliable RF Signal Connectivity

1. Product Overview

As wireless communication equipment continues to evolve toward smaller form factors and higher levels of integration, reliable RF signal transmission has become increasingly important to overall system performance. Kinghelm's KH-IPEXA-SMAKWE5-B50H RF Cable Assembly is designed to address the interconnection requirements of compact wireless devices.

The assembly combines a gold-plated four-leg semi-threaded SMA female connector with a first-generation IPEX connector and a high-quality 1.13 mm black coaxial cable, providing a compact and lightweight solution for RF interconnections. The assembly is 50 mm long and has a gross weight of only 4.4 g. It is supplied in a bag package.

Despite its compact size, the KH-IPEXA-SMAKWE5-B50H reflects Kinghelm's experience in RF interconnect technology and its focus on manufacturing quality and product reliability.

Key Specifications of the IPEX-to-SMA RF Cable Assembly

• Product Type: RF Cable Assembly

• Connector Configuration: 1st-generation IPEX to SMA female

• Cable Length: 50 mm

• Rated Voltage: 300 V
  
  

Kinghelm KH-IPEXA-SMAKWE5-B50H Product Image

2. Design: Three Key Components

The KH-IPEXA-SMAKWE5-B50H is built around three main components, each contributing to the overall reliability and electrical performance of the RF connection.

Gold-Plated SMA Female Connector

The SMA female connector features a gold-plated four-leg, semi-threaded design. It has a thread length of 5 mm and does not feature a groove.

The four-leg soldering structure provides secure mechanical attachment, while the semi-threaded design helps simplify installation and removal while maintaining a reliable connection. The gold-plated surface provides good electrical conductivity as well as improved resistance to oxidation and corrosion, helping to extend connector service life.

First-Generation IPEX Connector

The first-generation IPEX connector is widely used for miniature RF interconnections and is commonly found in internal antenna interfaces for Wi-Fi modules, Bluetooth modules, GPS/BeiDou positioning terminals, and other compact wireless devices.

The IPEX connector uses gold-plated contacts to provide stable electrical contact with the corresponding board-mounted connector and help maintain a reliable low-resistance connection.

1.13 mm Coaxial Cable

The 1.13 mm coaxial cable provides the RF signal path between the two connectors. With an outer diameter of only 1.13 mm, the cable is thin and flexible, making it well suited to applications where internal installation space is limited.

The black outer jacket provides resistance to wear and tensile stress, supporting the durability requirements of various equipment applications. The 50 mm cable length is suitable for short-distance interconnections while helping avoid unnecessary cable length, routing redundancy, and additional signal attenuation.

3. Electrical Performance: Key Specifications

The performance of an RF Cable Assembly ultimately depends on its electrical characteristics. The KH-IPEXA-SMAKWE5-B50H offers several specifications designed to meet the requirements of compact RF applications.

The assembly has a DC rated voltage of 300 V (10 ms), making it suitable for a wide range of RF front-end circuits within the specified operating conditions. It can be used in applications involving Wi-Fi modules, Bluetooth modules, 4G/5G communication units, and other wireless communication equipment.

The maximum conductor resistance is 3.0 Ω. A low conductor resistance helps minimize electrical losses along the connection path and supports efficient RF signal transmission.

The minimum insulation resistance is 5.0 MΩ. High insulation resistance helps reduce leakage between the signal conductor and surrounding conductive structures, contributing to stable and reliable electrical performance.

The RG1.13 coaxial cable and the SMA and IPEX connectors form a 50 Ω characteristic-impedance system covering a frequency range from DC to 6 GHz. This makes the assembly suitable for a variety of wireless applications, including 2.4 GHz Bluetooth, 5 GHz Wi-Fi, and certain sub-6 GHz 5G applications.

4. Applications: From Consumer Electronics to Industrial IoT

The compact design of the KH-IPEXA-SMAKWE5-B50H makes it suitable for a variety of wireless communication and RF applications.

Wi-Fi and Bluetooth Modules

Wi-Fi and Bluetooth modules are among the most common applications for IPEX connectors. The RF Cable Assembly can be used to connect wireless modules to antennas in devices such as home routers, smart speakers, industrial wireless network equipment, and other compact electronic products.

Drones and Remote-Control Systems

Drones and remote-control systems place particular emphasis on weight, size, and connection reliability. With a gross weight of only 4.4 g and a compact 50 mm length, the assembly is suitable for internal antenna connections in drones and other lightweight wireless equipment, helping minimize additional weight while providing a reliable RF connection.

Smart Home and IoT Gateway Devices

Smart home products and IoT gateways often have limited internal installation space. The small diameter and flexibility of the 1.13 mm coaxial cable allow engineers greater freedom when routing RF connections inside compact enclosures and around PCBs, supporting more space-efficient product designs.

GPS and BeiDou Positioning Terminals

GPS and BeiDou positioning terminals require reliable RF signal transmission between the antenna and receiver. The combination of gold-plated contacts and coaxial cable provides a stable connection path for transmitting RF signals between the antenna and receiving circuitry.

The assembly can also be used in industrial IoT terminals, compact RF communication equipment, vehicle-mounted antenna systems, and other wireless communication applications.

5. Handling and Installation Instructions

Proper installation and handling are important for maintaining the electrical and mechanical performance of an RF Cable Assembly.

Avoid excessive bending, pulling, or compression of the cable, particularly against sharp edges. Although the 1.13 mm coaxial cable is flexible, excessive bending may damage the internal conductor or shielding structure and may affect the cable's characteristic impedance and shielding performance.

When connecting the SMA connector, make sure the threaded connection is properly secured. Do not apply excessive tightening force, as this may damage the threads or deform the connector.

The IPEX connector should preferably be inserted and removed vertically. Avoid applying excessive lateral force, which may deform the terminal or damage the solder joint. Before mating the connector, make sure the interface is clean and free of foreign matter that could affect electrical contact.

Always operate the assembly within its specified rated voltage. Operation beyond the rated voltage should be avoided to prevent electrical damage and potential safety hazards.

Kinghelm KH-IPEXA-SMAKWE5-B50H Datasheet

6. Kinghelm: Experience and Commitment to Quality

The KH-IPEXA-SMAKWE5-B50H is manufactured by Kinghelm, a National High-Tech Enterprise with extensive experience in BeiDou/GPS antennas and RF interconnect products. Over more than a decade of development, the company has accumulated multiple BeiDou-related invention patents and software copyrights. Kinghelm is also a member of organizations including the China Satellite Navigation Association, the China Information Industry Trade Association, and the Guangdong Connector Association.

Kinghelm's product portfolio covers BeiDou/GPS antennas, RF components, miniature adapters, broadband data connectors, connectors and terminals, automotive wiring harnesses, industrial connectors, and customized components, among other product categories.

Its RF product range is designed for high-frequency and high-speed signal transmission, with products featuring low loss, effective shielding, and reliable electrical performance. A broad selection of connector types—including SMA, MCX, MMCX, FAKRA, and IPEX—as well as various cable lengths gives customers flexibility when selecting components for different applications.

7. Conclusion

The Kinghelm KH-IPEXA-SMAKWE5-B50H RF Cable Assembly combines a gold-plated SMA female connector, a first-generation IPEX connector, and a 1.13 mm coaxial cable to provide a compact solution for RF interconnections.

With a maximum conductor resistance of 3.0 Ω, a minimum insulation resistance of 5.0 MΩ, a 50 Ω characteristic impedance, and a specified frequency range of DC to 6 GHz, the assembly is designed to meet the interconnection requirements of a range of compact wireless communication devices.

For engineers developing space-constrained wireless products, the KH-IPEXA-SMAKWE5-B50H provides a practical connection between RF modules and antennas. Its compact dimensions, lightweight construction, and flexible cable design make it suitable for applications where installation space, cable routing, and connection reliability are important considerations.

About Kinghelm

Kinghelm(www.kinghelm.net) is committed to developing and manufacturing precision electronic components, connectors, control switches, and RF communication accessories. Its products are widely used in smart terminals, IoT, millimeter-wave communications, industrial control and testing, and other application areas.

Kinghelm's key product models include KH-IPEX-K501-29, KH-6X6X5H-STM, KH-6X6X5H-Z2J, KH-6X6X6H-STM, KH-6X6X8H-ZJ, KH-VH-PT3.96, and KH-SMA-P-8029, covering major product categories such as RF connectors, tactile switches, and wire-to-board connectors.

Its communication product portfolio includes RF cable assemblies, general-purpose antennas, GPS antennas, Wi-Fi antennas, and RF coaxial connectors, providing solutions for high-frequency signal transmission, positioning, and wireless connectivity.

The company's control-switch portfolio includes detection switches, slide switches, push-button switches, micro switches, multifunction switches, illuminated switches, DIP switches, toggle switches, and other product types for equipment control and circuit detection applications.

Kinghelm also supplies sensors, electronic components, earphone jacks, DC sockets, FPC connectors, USB connectors, and other precision interconnect products.

With strict quality-control standards, established manufacturing processes, and extensive industry experience, Kinghelm continues to improve product performance and manufacturing quality. Supported by a comprehensive product portfolio and reliable product quality, the company provides customers with integrated electronic component and interconnect solutions and continues to strengthen its position in the market.

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