极细同轴电缆的特点是什么？极细同轴电缆是由数根导体绞合而成的内部导体、绝缘体、外部导体、套管构成的电线，具有优异的耐弯曲性、节省空间性、信号高速 传输性以及抗电磁干扰性，可用于笔记本电脑及手机等电子设备的内部布线、超声波诊断装置用探测传输线(Probe Cable)等产品。要实现极细同轴电缆的细径化，必需减小作为构成部件的导体直径以及绝缘体和套管的壁厚。另一方面，由于导体变细后电阻会增大，因此要求导体材料本身具有高导电性和可承受反复弯曲及扭曲的高强度特性。

以下是对JAE FI-JW系列极细同轴线的分析

Recently, portable devices have become more compact and slim, so there is demand for a connector that takes up less mounting space and has a more compact, fine-coax wire plug side that can pass through a very small-diameter hinge after harness assembly.
The FI-JW series is a compact, low profile connector with plug that can pass through a very small diameter hinge after harness assembly.   
特征：                               

1. Plug side can pass through a 3.7mm dia. Hinge after harness assembly (40pos., AWG #42).                      
2. Mated dimensions of 3.2mm depth, 17.3mm width(40pos.), 1.65mm height are achieved.
3. Enables stable connection by a secure 0.35mm effective contact length.
4. Achieves low contact resistance at Gold plated ground contact points on plug and receptacle.
5. Incorporates mis-mating prevention key.
6. Enhanced noise resistance characteristic with 6 ground contact points between plug and receptacle.
7. Applicable wire: compatible with AWG #44 and #42 fine-coaxial wire.
8. Supports automated mounting with embossed tape for receptacle.
9. Solder migration prevention structure with Nickel barrier on receptacle.