I-PEX 82659-100B-02-D CABLINE®-UX II 40AWG/50Ω series ultra-thin coaxial cable replacement

How should the attenuation rate of ultra-fine coaxial束 be viewed?

For engineers, "What is the typical attenuation rate of a very thin coaxial cable assembly?" cannot be answered simply with a fixed dB value. Attenuation is a parameter that varies with frequency and usually requires considering factors such as insertion loss, operating frequency, cable length, conductor material, insulating medium, impedance, and connectors to make a judgment. Taking the I-PEX product 82659-100B-02-D as an example, this model is a CABLINE®-UX II 50Pin very thin coaxial cable assembly, using 50Ω Micro-Coaxial Cable AWG #46, with a length of 200mm, and both ends of the cable assembly are equipped with the 20532-050T-02-1 matching structure. The I-PEX official reference transmission speed for CABLINE®-UX II is 5 Gbps/lane NRZ, but the official product page does not define this value as the cable attenuation at a specific frequency. Therefore, in actual projects, the actual attenuation performance of the cable assembly should be determined by specific frequency points through S-parameters or insertion loss tests.

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Why can extremely thin coaxial cables also experience signal attenuation?

The extremely thin coaxial cable, although having a good high-frequency transmission structure, still produces signal loss during transmission. The higher the frequency, the more attention is usually needed for conductor high-frequency loss, dielectric loss, and the reflection effect caused by connectors and impedance discontinuities; at the same time, the longer the cable, the more obvious the cumulative transmission loss is typically. Therefore, it cannot be simply considered that "the thinner the AWG, the greater the attenuation will be," and it is necessary to comprehensively consider the cable structure and specific frequency. The 82659-100B-02-D uses 50 cores of 50Ω AWG#46 Micro-Coaxial Cable, with a nominal length of 200mm, belonging to the internal short-distance high-speed interconnection scenario of the equipment; in such applications, engineers should pay more attention to the overall insertion loss, return loss, and impedance continuity of the entire chain, rather than just looking at the conductor cross-sectional area. The I-PEX official page also provides an entry for the CABLINE®-UX II single-ended and differential signal integrity test data, indicating that high-speed applications require evaluation combined with actual SI testing.

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Engineering selection: In addition to asking "how much attenuation in dB," what else should we consider?

If evaluating a very thin coaxial cable assembly from the perspective of a research and development engineer, it is recommended to consider "attenuation" within the complete signal integrity framework. For 82659-100B-02-D, it is first necessary to confirm that the 50Ω Micro-Coaxial, AWG#46, and 200mm length are consistent with the original design. Then, further attention should be given to the impedance continuity at the connector end, insertion loss, return loss, crosstalk, and the actual high-speed eye diagram. The I-PEX CABLINE®-UX II uses a 0.25mm Contact Pitch and Vertical/Right Angle structure, offering 30, 34, 40, and 50Pin specifications, and provides a 5 Gbps/lane NRZ reference transmission speed; therefore, in actual projects, if the customer needs to determine whether the "attenuation meets the requirements of high-speed signals," a more reasonable approach is to determine the target frequency and data rate and then conduct the corresponding SI tests, rather than directly applying a universally accepted "typical attenuation rate."

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Selection, compatibility, and alternative solution references and suggestions

For procurement personnel and hardware engineers seeking alternative products for the 82659-100B-02-D, it is recommended to confirm the complete combination of "connector + wire + length + wire sequence + electrical performance". This model corresponds to CABLINE®-UX II 50Pin, AWG#46, 50Ω, 200mm, 1-N thin coaxial cable assembly, with the connector component model used at the wire end being 20532-050T-02-1; the 50Pin Plug Cable Assembly recommended by I-PEX is 20531-050T-02-1, and the Plug Metal Cover is 2799-0501, corresponding to the Receptacle 20533-250E. In addition to matching appearance and Pin count, the alternative product should also focus on verifying wire length, wire sequence, impedance, wire material outer diameter, connector mating dimensions, as well as insertion loss and return loss at the target frequency. Our company can provide: 82659-100B-02-D compatible alternative cable assembly solutions, which can be developed, prototyped, and mass manufactured for thin coaxial cable assemblies based on customer drawings and actual application requirements.

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The attenuation of ultra-fine coaxial cable束 must be combined with frequency and actual link judgment.
In general, there is no fixed "typical attenuation rate" for extremely fine coaxial cables that is independent of frequency, cable length, and testing conditions. For the I-PEX 82659-100B-02-D, its 200mm length and 50Ω AWG#46 Micro-Coaxial structure is suitable for high-speed signal interconnection within small electronic devices; the 5 Gbps/lane NRZ provided by I-PEX is a reference transmission speed for CABLINE®-UX II, rather than a fixed attenuation indicator for this 200mm cable at all frequencies. For engineers, it is recommended to judge the actual performance through data such as S-parameters, insertion loss, return loss, and eye diagrams. I am【3W Electronic Components Network】，Provide mature alternative solutions and engineering, product support for high-speed ultra-fine coaxial cable assemblies and connectors to professional customers. If you need, please contact:Manager Zhang 18913228573 (WeChat same number)For purchasing personnel, the important identification conditions for alternative procurement should include 82659-100B-02-D, 20532-050T-02-1, 200mm, 50Ω, AWG#46, and 1-N wire sequence.