In today’s high-frequency communication and precision electronics applications, the quality of RF cabling directly impacts system performance and stability. The KH-IPEX-SMA-RG137-80MM five-piece IPEX to SMA adapter cable set from Kinghelm is engineered to meet the demands of these critical environments—delivering a low-loss, high-stability interconnect solution for RF signal transmission. Featuring a premium 1.37mm black coaxial cable with high-quality SMA female connectors and precision IPEX-compatible terminals, this product is ideal for communication equipment, antenna modules, navigation systems, IoT devices, and other RF signal applications.

Kinghelm KH-IPEX-SMA-RG137-80MM Product Image

High-Precision Design for Compact and Reliable Layouts

The KH-IPEX-SMA-RG137-80MM RF adapter cable features a meticulously manufactured 80mm cable length, making it well-suited for space-constrained electronic devices. The ultra-thin Ø1.37mm coaxial cable significantly reduces the volume and weight of the assembly while maintaining excellent signal integrity and interference resistance. The finely structured cable offers robust shielding capabilities, enabling high-frequency signal transmission in environments such as compact antenna designs, WiFi modules, Bluetooth, and Zigbee communication modules.

Optimized Interface Components for Superior Performance

The IPEX terminal adopts a high-precision I-PEX-compatible 1.37-type connector with a gold-plated surface, enhancing conductivity and corrosion resistance while ensuring reliable insertion and secure connectivity. The SMA end features a standard female SMA jack with an 11-thread split-body structure, delivering a solid and stable mechanical connection. The gold-plated SMA connector not only boosts electrical performance but also provides excellent environmental resistance, maintaining stable operation in high-temperature and humid conditions.

Outstanding Electrical Characteristics

The KH-IPEX-SMA-RG137-80MM RF adapter cable demonstrates excellent electrical insulation and conduction properties. It boasts an insulation resistance ≥ 5.0M Ohm, which effectively isolates signals and minimizes leakage or short circuits. With a conduction resistance ≤ 3.0 Ohm, it ensures minimal signal attenuation even in high-frequency environments. The cable also supports a withstand voltage of up to DC 300V (10ms), meeting the demands of various RF systems requiring voltage stability—making it an ideal bridge for inter-module connectivity.

Efficient Packaging and Versatile Deployment

This product comes in a convenient five-piece pack, enabling batch deployment, streamlined inventory management, and cost savings in procurement and maintenance. Whether for engineering tests, small-scale production, or quick-replacement scenarios, the cable set is ready to use, improving work efficiency across applications.

Backed by years of expertise in RF connector manufacturing, Kinghelm offers a complete portfolio of RF interconnect products. In addition to the KH-IPEX-SMA-RG137-80MM, customers can choose from a wide range of adapter cable types—IPEX to IPEX, IPEX to MCX, IPEX to MMCX, and more—to meet diverse interface, frequency, and installation environment requirements.

Quality Manufacturing, Professional Service

Kinghelm upholds high standards not only in product design but also in its service and manufacturing systems. With a comprehensive production and quality control process, each cable undergoes rigorous inspection to meet the stringent requirements of high-frequency, low-loss signal transmission.

In the era of 5G, IoT, and smart terminals, the KH-IPEX-SMA-RG137-80MM stands out as a cost-effective and reliable RF cable solution. It’s particularly well-suited for dense PCBs, navigation antenna modules, UAV video transmission systems, and in-vehicle communication terminals—all scenarios that demand uncompromising signal quality and mechanical reliability.

Kinghelm: Your Trusted Partner in RF Connectivity

Choosing Kinghelm means choosing more than a product—it means gaining access to professional technical support and full-spectrum RF solutions. From standard connectors and custom-designed cables to fully integrated connector modules and end-to-end development from blueprint to volume production, Kinghelm is committed to empowering customers with fast, flexible, and reliable integration solutions.

Kinghelm KH-IPEX-SMA-RG137-80MM Specification

Conclusion: Compact, High-Performance, and Scalable

With its compact structure, superior RF performance, versatile interface compatibility, and Kinghelm’s robust product ecosystem, the KH-IPEX-SMA-RG137-80MM five-piece RF cable set provides RF engineers and procurement professionals with a scalable, high-quality interconnect solution. It is an essential component in modern RF system design—ensuring stable, efficient, and professional-grade signal transmission.

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.

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