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BIS U Basic Manual
5
Antenna Cable
Only coaxial antenna cables with a wave resistance or impedance of Z = 50 Ω may be used to
prevent reflections and vertical waves (resonance) in the antenna line.
Losses resulting from the transfer of electric power to the antenna are known as cable
attenuation.
The degree of the cable attenuation depends entirely on the length of the cable, which is
selected based on the cable diameter, cable configuration and frequency response. As a general
rule, the cable manufacturer specifies the cable attenuation in dB per meter (dB/m).
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