Product Overview
Foam Coaxial Cable
Bare Copper Conductor
Foam Polyolefin Dielectric
Laminate Aluminum Tape Shield
Tinned Copper Braid 85%
Black PVC Jacket
Structural parameters Information
|
Material |
Detail |
Size mm |
Color |
|
Inner Conductor |
Bare Copper |
1/2.74±0.03 |
Coppery |
|
Dielectric |
Foam PE |
7.24±0.15 |
White |
|
1st Outer Conductor |
Laminate Aluminum Tape |
7.45±0.15 |
Silvery |
|
2st Outer Conductor |
Tinned-Copper Braid(144*Φ0.15mm) |
8.05±0.15 |
Silvery |
|
Jacket |
PVC |
10.30±0.20 |
Black |
Physical Mechanical Specifications
|
Item |
Unit |
Date |
|
Minimum Bend Radius |
Loaded /mm |
103 |
|
|
Unloaded /mm |
51.5 |
|
Temperature Rating |
℃ |
-20 ~ +80 |
Electrical Specifications
|
Item |
Unit |
Date |
|
Impedance |
Ω |
50±3 |
|
Capacitance |
pF/m |
79±3 |
|
Velocity ratio Propagation |
% |
85 |
|
Resistance |
Ω/km |
|
|
Inner Conductor |
|
4.91 |
|
Outer Conductor |
|
6.92 |
|
Insulation resistance |
MΩ.km |
1000 |
|
Dielectric strength |
V(DC) |
2500 |
|
Withstand voltage of jacket |
V(AC) |
8000 |
|
Maximum operating frequency |
MHz |
3000 |
|
Peak Power |
kW |
16 |
|
Shielding Effectiveness |
dB |
90 |
|
Tensile Strength |
kg |
70 |
Attenuation and Avg.Power, Typical value (20℃) (Allowable tolerance±15%)
|
Frequency MHZ |
Attenuation(dB/100m) |
Avg.Power(kW) |
|
30 |
3.5 |
2.77 |
|
50 |
2.9 |
2.10 |
|
150 |
5.1 |
1.22 |
|
200 |
5.9 |
1.07 |
|
220 |
6.2 |
1.00 |
|
450 |
8.9 |
0.69 |
|
900 |
12.8 |
0.48 |
|
1500 |
16.9 |
0.36 |
|
1800 |
18.6 |
0.32 |
|
2000 |
19.7 |
0.31 |
|
2500 |
22.2 |
0.28 |
|
3000 |
24.6 |
0.26 |
Technical Principles and Loss Optimization
Sources of Loss
Mainly include resistive loss (heat dissipation caused by current flowing through the conductor) and dielectric loss (polarization effects of the insulating material). Resistive loss increases with the square root of frequency, while dielectric loss increases linearly with frequency.
Optimization Measures
Conductor Material: Use multi-strand silver-plated copper wire to minimize skin effect.
Insulation: Use expanded polyethylene or fluoroplastic to lower the dielectric constant and reduce energy absorption.
Shielding Structure: Silver-plated copper tape + high-density braiding provides double shielding to suppress electromagnetic interference.
Zhenjiang Tongda Electronics Co., Ltd. is a professional manufacturer of lmr 400 coaxial cable, providing you with products suitable for you.
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