Aug 042016
 

Data Alliance uses low-loss double-shielded coaxial cable in all of our antenna cables, as opposed to the old standard, RG cable that is used in most other brands of antenna cables, and has a single layer of shielding.

Data Alliance uses low-loss coaxial cable in all of our antenna cables, as opposed to the old standard, RG cable that is used in most other brands of antenna cables.The term “low loss” antenna cables  refers to the’ low attenuation (loss) over distance, of the coaxial cable used in the antenna cable, relative to a typical old standard, RG cable. LMR-100 structure, showing two layers of shielding.Low loss coaxial cable has far better shielding than typical RG style cable thus achieving better low loss characteristics.  Additionally, low loss coaxial cables use solid center conductors which offer lower attenuation than stranded conductors that are sometimes found on RG style cables. Low loss coaxial cables are typically used in WLAN, Cellular, PCS, ISM and many other wireless applications   The LMR-series coax is rated for outdoor use and are also suitable for indoor use

Among the coax types below, the RG-series is the lowest quality and thinnest (RG174 & RG178, RG58).  LMR100 & LMR200 tabs below include detailed specifications.

LMR-100

LMR100 attenuation

LMR100 attenuation at various frequencies 150MHz to 3000MHz:  100 meters

LMR-100 Specifications & Attenuation (Signal Loss):
LMR100-Structure-Diagram
No. in diagram above: Item Structure Material Color
1 Inner conductor 0.45±0.02mm Bare copper Yellow
2 Insulation 1.50±0.10mm LDPE Nature
3 Folia 1.60±0.10mm Aluminum foil Silver gray
4 Wire braid 80*0.10mm Tinned copper Silver gray
5 Jacket 2.90±0.10mm PVC Black
Attenuation (Signal Loss) at 20℃ (Max.) 150MHz dB/100m 32.3
200MHz dB/100m 35.6
400MHz dB/100m 49.3
1000MHz dB/100m 80.6
1500MHz dB/100m 98.7
2000MHz dB/100m 115.5
2500MHz dB/100m 130.6
3000MHz dB/100m 142.4
Electrical Physical and properties of product
Item Unit Value
Capacitance pF/m 100± 5
Impedance W 50± 2
Velocity ratio % 66
Bent radius min mm 15
Max voltage VMS 1500
Max Frequency MHz 3000
Temperature scope  -20 ~ +80
LMR-100 compared to RG316

LMR-100 has lower signal-loss than RG316

LMR-100 coaxial cable is used in short antenna cables (usually less than 7FT)
Attenuation Per Foot in LMR100 Coax: (black jacket)

  • at 900 MHz: 0.23 db/ft
  • at 2.4 GHz: 0.39 db/ft
  • at 3.4GHz: 0.47 db/ft
  • at 5.1-5.8GHz: 0.643 db/ft

LMR-200

LMR-200 Specifications & Attenuation (Signal Loss):
LMR100-Structure-Diagram
No. in diagram above: Item Structure Material Color
1 Inner conductor 1.12±0.02mm Bare copper Yellow
2 Insulation 2.95±0.10mm Foam PE White
3 Folia 3.07mm Aluminum foil Silver gray
4 Wire braid 96*0.12mm Tinned copper Silver gray
5 Jacket 5.00±0.10mm PVC Black
Attenuation (Signal Loss) at 20C (Max.) 200MHz dB/100m 16
400MHz dB/100m 24
900MHz dB/100m 33
1500MHz dB/100m 43
1800MHz dB/100m 47
2500MHz dB/100m 56
Electrical Physical and properties of product
Item Unit Value
Capacitance pF/m 81± 5
Impedance W 50± 2
Velocity ratio % 86
Bent radius mm 25
Max voltage VMS 1500
Max Frequency MHz 3000
Temperature scope  -20 ~ +80

LMR-400LMR-400: Attenuation Per Foot in LMR400 Coax:

  • at 900 MHz: 0.228 db/ft
  • at 2.4 GHz: 0.391 db/ft
  • at 3.4GHz: 0.532 db/ft
  • at 5.1-5.8GHz: 0.641 db/ft

Signal Loss / Attenuation: All aboutThe attenuation rate per foot does not change with length of the cable:  i.e.,  attenuation at 10 feet is 10x the attenuation at one foot, etc.

Attenuation In Coax For Antenna Cables:   Signal strength is lost in the antenna cable:   It is best to have the shortest cable that will serve your needs.

As coaxial antenna cable transfers radio frequency (RF) power from one point to another, the power that enters it is degraded along the length of the RF cable, meaning less power reaches the remote than entered the RF cable. This loss of power in the coax cable is what is referred to as attenuation. The loss is defined in terms of decibels/unit length at a given frequency:

Coax used in Data Alliance’s antenna cables:  We use low loss antenna cables for superior connection quality.  Suited for indoor and outdoor use, our cables provide superior matching and loss values.  Both connectors are soldered, not crimped, for the best possible signal quality. 

Our shorter cables (less than two meters) we make with cable type equivalent to LMR100 or higher,  in quality and signal-loss per meter.  All of our cables of 2-meters or more are made from cable equivalent to LMR200 in quality and signal-loss per meter.  The higher quality of the cable of our cables translates into lower sigal loss / better performance. 

Our cables of 2-meters to 9-meters are made from cable-type equivalent to LMR200 in quality and signal-loss per meter.  Longer cables made from cable-type equivalent to LMR400 The higher quality of the cable of our cables translates into lower signal loss & better performance. 

SOLUTIONS FOR SIGNAL LOSS:  

The solution is to reduce the length of antenna cables or eliminate them altogether, if possible:  Bring the WiFi device as close as possible to the antenna.  

Use one of the following solutions:

RG-174RG-174 Attenuation Per Foot:

  • at 900 MHz: 0.31447 db/ft
  • at 2.4 GHz: 0.60237 db/ft
  • at 3.4GHz: 0.76886 db/ft
  • at 5.1-5.8GHz: 1.1134 db/ft

RG-178RG178 Attenuation Per Foot:  (RG178: clear jacket over copper braid)

  • at 900 MHz: 0.55 db/ft
  • at 2.4 GHz: 0.89 db/ft
  • at 3.4GHz: 1.02 db/ft
  • at 5.1-5.8GHz: 1.38 db/ft

RG-58RGB-58 Attenuation Per Foot:

  • at 900 MHz: 0.1365 db/ft
  • at 2.4 GHz: 0.258 db/ft
  • at 3.4GHz: 0.328 db/ft
  • at 5.1-5.8GHz: 0.479 db/ft

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