|
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 |
|
|
|
|
PRINT![Coaxial Cable 50 ohm: Tri-Lan 240 [1m]](http://www.dipol.com.pl/pict/e1171++++.jpg)
![Coaxial Cable (50 ohm): Tri-Lan 400 WLL [1m]](http://www.dipol.com.pl/pict/e1173++++++.jpg)
