Structure of Coaxial Cables


Cables with a multi-layered structure with a center conductor covered with an insulator layer along with an outer conductor and jacket are called “Coaxial Cables.” 

Coaxial cable

 

Micro-Coaxial Cables


Among those coaxial cables, cables used for high-performance small devices such as notebook PCs, foldable smartphones, and medical equipment are extremely small. In general, those small-size coaxial cables with an outer cable diameter (O.D.) of ~1 mm or less are referred to as "Micro-coaxial Cables.”

Size

 

High Flexibility


Oftentimes, micro-coaxial cable is used because it has a higher degree of flexibility compared to shielded FPC/FFC and it can stabilize the electrical characteristics even if it is bent.

Flexible cable

 

Excellent Impedance Controllability


When a high-speed transmission signal is transmitted through the cable, the electrical signal is reflected in places where the impedance is changed, so it is necessary to keep the impedance as constant as possible in order to suppress disturbance in the signal quality.
The impedance of the micro-coaxial cable can be controlled appropriately by adjusting the distance between the center conductor and the outer conductor, or the insulator material.

cross-section
Cross-section of micro-coaxial cable

 

Excellent Shielding Function


As the micro-coaxial cable outer conductor plays the role of the electromagnetic shield, it has excellent measures against electromagnetic interference (EMI) that prevents leaking the electromagnetic noise to the outside from the electrical signal transmitted through the center conductor, and it also has excellent measures against electromagnetic susceptibility (EMS) to electromagnetic noise from the outside.

Prevent leaking
Prevents leaking electromagnetic noise
Less susceptible
Less susceptible to electromagnetic noise

 

 

 

 

 

 

Micro-coaxial Cable Harness Assembly Process


It is possible to create small, flexible micro-coaxial cable assemblies that have excellent electrical characteristics by terminating micro-coaxial cables with connectors.

Harness assembly process

 

High-Performance EMC Shielding


With I-PEX's EMC shielding connectors (ZenShield®), the micro-coaxial cable assemblies can provide significant mitigation of EMI. For this reason, micro-coaxial cable assemblies using the ZenShield® connector series are often used in high-performance electronic devices equipped with wireless communication functions that require countermeasures for intra-system EMC problems.

Learn more about Micro-coaxial connectors: What is Micro-coaxial Connectors?

ZenShield

 

Product Assembly Process that takes Advantage of High Flexibility


Taking advantage of the features of flexible cables, the micro-coaxial cable assemblies are used in various applications such as devices with hinge components that wire has to pass-through, and with narrow and complicated structures that make it difficult to route wiring during assembly.

Related article: Hinge Component Pass-Through with CABLINE® Harness Assemblies

Pass-through

 

Examples of Suitable Applications


세선동축케이블은 고속신호를 전송할 수 있음과 동시에 뛰어난 유연성과 쉴드 성능을 겸비하고 있습니다.

Below are examples of applications that take advantage of the flexibility of micro-coaxial cable assemblies.

NotePC
Notebook PC hinge component
Dual-Display Phone
Dual-display foldable smartphone
Camera
Camera gimbal
Medical equipment
Medical equipment
AR/VR
AR/VR headset
Server
Server/data center