Shielded Attenuation Exploration And Examples For Coaxial Cables

The shielding water case of physical foamed polyethylene coaxial cable mainly depends on the following factors:

1: The overlap width of aluminum foil is not less than 5mm.

2: The thickness of the aluminum layer is recommended to be increased to more than 15µm, or even higher to 30µm.

3: Reasonably arrange the relationship between attenuation, echo and shielding, the former and the latter are contradictory,

Reasonably reducing the foaming degree under the condition of qualified attenuation is beneficial to improve the shielding effect and echo.

4: The quality of the aluminum foil is better, especially the flexibility is good, and there is no crack after various bending.

5: The vertical wrapping process of weaving should be improved to avoid wrinkles in the middle of the belt.

A gap is formed or the overlap width is reduced, causing leakage.

6: Reasonable weaving density. The high density compensates a little for shielding,

However, if the braid density is too high, at high frequencies, the high density braided cable makes the

The "side frequency difference" increases, which increases the difficulty of amplifying compensation and affects the cable performance.

Usually 40% is enough.

7: During the laying process of the cable, it is necessary to avoid strong pulling in the small holes or slits, so that the aluminum foil will crack or break.

The following design schemes shield the effect:

Meet ClassA, 90dB, 100dB at 30~3000MHz respectively