What are the important factors when choosing RF coaxial cable?

Hi, everybody

As I know, there are many RF coaxial cables for measuring antenna, such as RG-178, RG-316, Semi-rigid and mini-cable. For selecting a coaxial cable, what things should we pay attention to ?

Try these links on coax cable selection:
http://www.epanorama.net/documents/w...coaxcable.html
http://www.pfm.howard.edu/infosys/ch...rect_cable.pdf
http://www.accesscomms.com.au/coax.htm

effects of bending and torsion. they are dramatic for proper antenna measurement, both in phase and amplitude.

unless you can use a planar scanner (and even in that case i'm afraid), the measurement of an antenna implies rotations and movements, so the cable must be unsensitive to them in order not to give different transmission values for each position.

very good phase stable cables are manufactured by reynolds and times microwave