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TECHNICAL SECTION
Coaxial Calculations



COAXIAL CABLE CAPACITANCE (pF/FT)
50 OHM SOLID
POLYETHYLENE
30.8 (pF/FT)
75 OHM SOLID
POLYETHYLENE
25.4 (pF/FT)
75 OHM SOLID
POLYETHYLENE
20.6 (pF/FT)
75 OHM SOLID
POLYETHYLENE
16.8 (pF/FT)
95 OHM SOLID
POLYETHYLENE
16.3 (pF/FT)
75 OHM SOLID
POLYETHYLENE
13.4 (pF/FT)
COAXIAL CABLE VELOCITY OF PROPAGATION (%)
AIR
100%
FOAM POLYETHYLENE
78% - 80%
FOAM FEDP TEFLON®
180%
TFE TEFLON®
71%
POLYETHYLENE
67%
SILICONE
58%
PVC
45%
COAXIAL CABLE VELOCITY OF PROPAGATION (%)
PERCENTAGE COVERAGE
ISOLATION
(DB DOWN)
PERCENTAGE COVERAGE
ISOLATION
60
25 - 35
90
55 - 60
70
30 - 40
90
55 - 60
80
45 - 50
DBL. 90 SHIELD
65 - 70
85
50 - 55
TRIAXIAL 90% SHIELD
75 - 80