Cables used in the medical field must maintain high quality standards because they are working to save lives. Data transmitted needs to have best signal integrity and minimum attenuation. Many different types of cables are being used in medical electronic equipment.

Coaxial and high frequency cables are purely distinctive in its use. Coaxial cables are used in the medical fields where the high frequencies transmission is involved with low attenuation factor. It carries a wide variety of high-quality low-loss cable
Coaxial and High Frequency Cablesassemblies and bulk cable for applications that require a high frequency, such as wireless communication.

Construction

There are many RF (radio frequency) coax cables that can be used for audio, although there are many others that are completely unsuitable for a variety of reasons. For example, some use a single core for the center conductor, often copper plated steel. This is fine for RF, because the skin effect means that the high-frequency signal will be concentrated on the outer surface.

Since the plating is copper, it has low resistance. The steel inner core gives the cable added mechanical strength, but it is not very flexible and cannot be bent to a small radius. If constantly flexed the center conductor will break, so this type of cable is only suitable for fixed installations. However, it can be used for fixed audio installations if desired.


Coaxial and High Frequency Cables 02Important Parameters of Co-axial

     1) Impedance

Radio frequency coax always has a designated impedance, most commonly 50 ohms or 75 ohms. 50-ohm coax is pretty much the standard for radio transmitters and receivers, laboratory equipment (for example almost all oscilloscopes are fitted with 50 ohm BNC connectors).

     2) Velocity Factor

Something that tends to make the inexperienced really wonder about the overall sanity of electronics as a whole is a cable’s velocity factor – an indication of how much the cable slows down an electromagnetic wave traveling in the cable

   Coaxial and High Frequency Cables 03  3) Coaxial Connectors

This is really a can of worms. There are so many different connectors that it’s hard to know where to start. The first decision will always be the physical form of the connector, and it will usually have to mate with an existing connector on the equipment.

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