Coaxial Cable (PDF40k)

The frequency used in the mobile communication systems is shifted to higher range. So
coaxial cables for the mobile communication systems are required to have superior
characteristics such as low loss, high power, small diameter and flexibility.
Fujikura has developed the two types of heat resistant corrugated coaxial cables which
have 3 and 5 mm in insulation diameter. The coaxial cables achieve the excellent
characteristics of low loss, high power and easy handling by using the tetrafluoroethylene
insulation and the corrugated copper spiral tube.
Fujikura will continue to make significant contributions to a variety of fields by providing
high-performance and high-frequency coaxial cable.
Table 1. Dimensions and electrical characteristics (at 20°C).
Items
Inner conductor
Insulation
Outer conductor
Sheath
3D-WFCH-LP
5D-WFCH-LP
Material
-
Silver coated, copper
covered steel wire
Silver coated
copper wire
Nom. diam.
mm
0.93
1.63
Material
-
Polytetrafluoroethylene
Material
-
Corrugated copper pipe (spiral construction)
Nom. diam.
mm
Material
-
3.58
6.35
Flame retardant polyethylene
Overall diam.
mm
4.6
7.4
Approx. net weight
kg/km
45
110
Nom. capacitance
pF/m
86
89
Characteristic impedance
Ω
50 ± 1
50 ± 1
0.9GHz
0.34
0.19
1.5GHz
0.44
0.25
1.7GHz
0.47
0.26
Coaxial Cable
Nom. attenuation
Min. bending
radius
2.0GHz
dB/m
0.50
0.29
2.2GHz
0.53
0.30
5.0GHz
0.85
0.47
10
25
Single bend
mm
Repeated bend
Temperature range
-
15
40
−40 to 105°C
−40 to 105°C
1.50
Inner conductor
Insulation
VSWR
5D-WFCH-LP
with SMA connector
1.40
1.30
1.20
Outer conductor
1.10
Sheath
1.00
0
1,000 2,000 3,000 4,000 5,000 6,000
frequency (MHz)
3D-WFCH-LP
with SMA connector
VSWR
1.50
1.40
1.30
1.20
1.10
1.00
0
Fig.2. VSWR (3D-WFCH-LP at 1 m).
1,000 2,000 3,000 4,000 5,000 6,000
frequency (MHz)
Fig.3. VSWR (5D-WFCH-LP at 2 m).
attenuation (dB/m, 20°C)
Fig.1. Coaxial cable samples.
10
5D-WFCH-LP
1
10,000
1,000
0.1
100
3D-WFCH-LP
10
1,000
10,000
frequency (MHz)
*Calcurating conditon of power rate:
ambient temp.40°C, VSWR=1.0
0.01
100
calculated power rate (W)
New
Products
Unit
Fig.4. Attenuation and calculated power rate.
[Information]
Engineering Department
Industrial & Telecommunication Cable Division
Tel : +81 3 5606 1272 FAX : +81 3 5606 1549
E-mail : [email protected]
Fujikura Technical Review, 2007
73
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