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gui feng cable news: coaxial cable shielding attenuation exploration and examples
from：guichao author：admin click： 515 addtime：2017-04-22 14:59:54
the case of plastic foam polyethylene coaxial cable shielding water mainly depends on the following factors:
1: aluminum foil overlap width of not less than 5mm.
2: the aluminum layer thickness suggest increased to more than 15 m, or even higher than 30 m.
3: reasonable arrangement of attenuation, echo, shielding the relationship between the former and the latter 2 contradictory,
it is beneficial to improve the shielding effect and echo to reduce the foaming degree under the condition of attenuation.
4: aluminum foil quality is better, especially flexible, after a variety of bending without crack.
5: weaving longitudinal bag technology to improve, so as to avoid the middle belt fold,
forming a gap or reducing the width of the lap, causing leakage.
6: reasonable weaving density. high density has little compensation for shielding,
however, if the density is too high, at high frequencies, the density of braided cables makes
edge frequency difference increases, thus increasing the difficulty of amplification compensation, the impact on the performance of the cable.
general 40% can.
7: the laying process of the cable to avoid the small holes or slits in the tension, so that aluminum foil crack or fracture.
the following design shielding effect:
respectively in 30~3000mhz meet classa, 90db, 100db