Micro coaxial cable is a type of coaxial cable with an extremely small diameter and precise structure, with the wire diameter typically ranging from 0.2mm to 1.5mm. It consists of a central conductor, insulation layer, shielding layer, and sheath, and is designed for high-frequency signal transmission, offering excellent anti-interference and signal integrity performance. Generally, the wire gauge range of micro coaxial cables is 30AWG to 50AWG. AWG (American Wire Gauge) is a standard system of units used to indicate the diameter of wire conductors. The higher the AWG value, the finer the conductor; conversely, the lower the value, the thicker the conductor.
One, common wire gauge and wire diameter comparison
The extremely thin coaxial cables are mainly distinguished by the American Wire Gauge (AWG). As the AWG number increases, both the conductor diameter and the overall cable outer diameter will decrease. The following are typical parameters of several common specifications:
36 AWG ultra-fine coaxial cable:
Center conductor diameter is approximately 0.127 mm
The outer diameter of the cable is about 0.45 mm
• Application scenarios: ultra-small cameras, endoscopes, wearable devices, and other environments with high requirements for signal quality and flexibility.
② 38 AWG ultra-fine coaxial cable:
Center conductor diameter is about 0.101 mm
The outer diameter of the cable is approximately 0.38 mm.
Commonly used in applications with limited space such as smartphones, drone transmission systems, and medical catheters.
③ 40 AWG ultra-fine coaxial cable:
• Center conductor diameter is about 0.08 mm
• Cable outer diameter approx. 0.32 mm
Applicable to high-precision signal transmission occasions such as ultra-micro sensors and precision medical instruments.
④ 42 AWG ultra-fine coaxial cable:
• Center conductor diameter is about 0.063 mm
Approximately 0.25 mm cable outer diameter
Often used in high-density wiring, miniaturized modules, and special high-speed signal transmission systems.
Why choose different line gauges?
Space limitation: The more compact the internal space of the device, the finer the wire diameter required, and a higher AWG model needs to be selected.
Signal performance: The resistance of thicker wire diameter is lower, and the signal attenuation is smaller; while finer wire diameter wiring is flexible, but it needs to take into account signal integrity.
• Bend life: Extremely thin cables have high flexibility, suitable for frequent bending or dynamic motion applications.
Transmission Rate: For high-frequency signals such as MIPI, LVDS, etc., both wire specifications and shielding structures should be considered to ensure stable transmission.
Extremely thin coaxial cables, with a variety of wire gauge specifications (such as 36AWG, 38AWG, 40AWG, 42AWG, etc.), can be flexibly applied in miniature devices with different sizes and signal requirements. When selecting, engineers should comprehensively consider the conductor wire gauge, outer diameter (OD), spatial layout, and signal characteristics to achieve the best transmission performance and assembly compatibility.
We have been focusing on the design and customization of high-speed cable harnesses and extremely thin coaxial cable harnesses for a long time, committed to providing stable and reliable high-speed interconnection solutions. If you have any related needs or want to learn more, please contact: Manager Yin.
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