7/8''s feeder cable

Type                                 Type No.

Standard cable                  HHTAY-50-21

Fire-retardant cable             HHTAYZ-50-21

Construction                                     

Inner conductor

Material

Helical corrugated copper tube

Diameter(mm)

9.4±0.1

Insulation

Material

Foamed PE

Diameter(mm)

22.7±0.25

Outer conductor

Material

Annular corrugated copper tube

Diameter(mm)

24.9±0.25

Jacket

Material

LLDPE or fire-retardant PE

Min.thickness(mm)

>1.0

Diameter(mm)

27.5±0.25

Mechnical Characteristics                                    

Bending radius(mm)

Single bend

80

Repeated bend

125

Tensile strength(N)

1020

Cable weight(kg/km)

430

Recommended temperature(℃)

Storage

-70~+85

Installation

-40~+60

Operating

-55~+85

Electrical  Characteristics                                 

Inner conductor DC resistance(Ω/km)

2.97

Outer conductor DC resistance(Ω/km)

1.31

Characteristic impedance(Ω)

50±1.5

Capacitance(p F/m)

75

Velocity(%)

88

Dielectric strength(KV)

6.0

Insulation resistance(MΩ/km)

>1×10⁴

Peak power rating(KV)

90.0

Peak voltage(V)

3100

Cut-off frequency(GHz)

5.2

Attenuation and Average power(Maximum attenuation value shall be 105% of the nominal attenuation value)                        

Frequency

(MHz)

Attenuation

(@20℃,d B/100m)

Average  power(kv)

200

1.87

4.61

450

2.88

2.99

800

3.94

2.19

900

 4.22

2.06

1000

4.46

1.94

1500

5.60

1.54

1800

6.21

1.39

2000

6.59

1.31

2200

6.95

1.23

2500

7.50

1.15

3000

8.35

1.04

VSWR                                       

800MHz~1000MHz

1.10

1700MHz~2500MHz

1.13

2500MHz~3000MHz

1.15