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Installations

Cabling

Use of coaxial cables and connectors in WLAN systems
Original Polish version by Lukasz Sawicki
The range of wireless network depends on many factors. The user has influence on some of them, others cannot be changed in a specific environment. The main factors are:
  • factors connected with the features of the devices used:
    • output power
    • attenuation of cables
    • gain of antennas
    • sensitivity
  • external conditions:
    • attenuation between antennas (it can be assessed using FSL model)
    • interferences coming from other systems/devices (they cannot be assessed - it is only possible to reserve some power margin to overwhelm them)
    • existing physical obstacles (walls, ceilings, trees etc.)
The loss of power in the cable can be reduced by using coaxial cables working up to 6 GHz. Their attenuation at 2.4 GHz is considerably lower than that of typical cables used in this band.In 2006, DIPOL launched modern Tri-Lan cable family.Main features of Tri-Lan cables:
  • low attenuation (so much as 20% lower than in the case of H-155, or H-1000)
  • perfect impedance matching
  • high screening efficiency (90dB at 2.4GHz)
  • PE sheath resistant to UV radiation (Borealis LE 8707 - plastic from renown producer), which allows to use the cables outdoors.
Coaxial Cable 50 ohm: Tri-Lan 240 [1m]
Coaxial Cable (50 ohm): Tri-Lan 400 WLL [1m]
The details of Tri-Lan 240 cable
The details of Tri-Lan 400 cable

Copper core

Diameter

1.4 mm

Mechanically foamed dielectric

Outer diameter

3.8 mm

Shielding

Al foil/Polyester/Al foil:

12/15/12 um

Covering factor

100 %

CuSn braid

16x7x0.12

Covering factor

80 %

Outer diameter

4.45 mm

Sheath

Material

PE

Outer diameter

6.10 mm

Color

black

Electrical parameters

Impedance

50 ohm

Capacitance

83 pF/m

Wave reduction factor

81 %

Screening efficiency

>90 dB

Resistance of the core

11.2 ohm/km

Resistance of the shielding

12.4 ohm/km

Other parameters

Minimum bending radius

30/60 mm

Weight

47 kg/km

Operating temperature

-40 to +70 deg C

Copper core

Diameter

2.7 mm

Mechanically foamed dielectric

Outer diameter

7.2 mm

Shielding

Al foil/Polyester/Al foil:

25/12 um

Covering factor

100 %

CuSn braid

24 x 7 x 0.15

Covering factor

83 %

Outer diameter

7.95 mm

Sheath

Material

PE

Outer diameter

10.3 mm

Color

black

Electrical parameters

Impedance

50 ohm

Capacitance

80 pF/m

Wave reduction factor

83 %

Screening efficiency

>90 dB

Resistance of the core

3.1 ohm/km

Resistance of the shielding

5.8 ohm/km

Other parameters

Minimum bending radius

50/100 mm

Weight

149.2 kg/km

Operating temperature

-40 to +70  deg C

In the 2.4 GHz band there can effectively operate (in the specific location) only 3 wireless networks. Popularity of WLAN technology is the reason that the needs are higher. The only solution for coexisting a larger number of WLANs is migration to 5 GHz band. The currently used coaxial cables Belden H-155 or H-1000 are not suitable for this change, especially H-155 - with stranded inner conductor. Its good equivalent allowing migration to 5 GHz band is Tri-Lan 240 E1171_100, with solid copper wire. It is very important difference strongly influencing parameters in the 5 GHz band. Below we show table comparing the two cables.
Comparison of Tri-Lan 240 and H155 cables
Data compared

Type of cable

Name

Tri-Lan 240

Belden H-155

Inner conductor

1.4 mm/solid wire (Cu)

1.35mm (19x0.28mm)/stranded conductor (Cu)

Capacitance [pF/m]

83

82

Screening efficiency [dB]

>90

>81

Inner conductor resistance [ohm/km]

11.2

15

Outer conductor resistance [ohm/km]

12.4

32

Attenuation [dB/100m]

1000 MHz

24.6

30.9

2400 MHz

39.8

49.6

5500 MHz

63.5

---

More technical details of Tri-Lan cables can be found on the catalog pages
Tri-Lan 240 E1171_100 and Tri-Lan 400 E1173_100
The important elements in the design and construction of WLAN installations are connectors for coaxial cables. When selecting the connectors, the key factors should be the frequency range, insertion and return loss.
DIPOL has introduced high quality connectors that can be used up to 6 GHz, designed for Tri-Lan 240 and Belden H-155 cables.
Below we present DIPOL connectors compared to other brands.
Cheap no-name connectors
DIPOL connectors
Expensive top-brand connectors
The most popular applications of the connectors:
SMA/RP female connector for Tri-Lan 240/H-155 cable (6 GHz)
SMA/RP female connector is most commonly used in devices operating at 2.4 GHz to connect an external antenna.
SMA/RP female connector for Tri-Lan 240/H-155 cable (6 GHz) E84155
SMA/RP male connector for Tri-Lan 240/H-155 cable (6 GHz)
SMA/RP male connector is most commonly used in devices operating at 2.4 GHz to connect an external antenna.
SMA/RP male connector for Tri-Lan 240/H-155 cable (6 GHz) E84150
N-socket for Tri-Lan 240/H-155 cable (6 GHz)
N-socket is most commonly used in devices (usually antennas) operating in 2.4 and 5 GHz bands. The sockets are also used is active devices like GSM, DCS , 3G amplifiers/repeaters.
N-socket for Tri-Lan 240/H-155 cable (6 GHz) E84135
N-plug for Tri-Lan 240/H-155 cable (6 GHz)
N-plugs are used to connect antennas to active devices.
N-plug for Tri-Lan 240/H-155 cable (6 GHz) E84130
Specifications:
Name

SMA/RP female

SMA/RP male
N-femaleN-male
CodeE84155E84150E84135E84130
Impedance [Ω]50505050
ApplicationTri-Lan 240, H-155
Frequency range [GHz]0...180...180...110...11
VSWR<1.3<1.3<1.3<1.3
Contact resistance [mΩ]Pin6633
Outer contact
2222
Insulation resistance [MΩ]min. 5min. 5min. 5min. 5