Use of coaxial cables in WLAN systems

VÝROBCOVIA

Káble

O WLAN kábloch

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.


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.

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

KNIŽNICA SEKCIE

O multimediálnych kábloch (4)

O WLAN kábloch (1)

O LAN kábloch (1)

Montáž konektora (2)

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