Antenna Cable - Low Loss - LMR400 SMA

LL400 Coax Cable - SMA female - female

In Stock


  • none 
  • 5m (+AU $39.00)
  • 7m (+AU $46.00)
  • 10m (+AU $58.00)
  • 15m (+AU $78.00)
  • 20m (+AU $97.00)

LL400 Antenna Coax Cable
(CLF400, KSR400,®LMR400) Super Low Loss - 50Ω Double Shielded 10.3mm

*These are the cables supplied as options to our antennas.
Best suited to Fixed-Wireless installations such as Office buildings and Homes.
Larger than ®LMR240 but lower loss and more rigid.

This version of coax is the same LL400 cable option supplied with our antenna kits and has SMA female connections on both ends. For other connectors and lengths see our Made to Order LL400 product.
Double shielded by one layer of Aluminium foil and one close-knit copper braid make for a low-loss coax with 10.3mm overall diameter.
Its low signal attenuation figures make it well suited for use at Cell Phone frequencies.

LL400 - Signal Loss - 10m cable length
Frequency (MHz):
850 900 1800 2100 2400 (WiFi)
Attenuation (dB):

1.25 1.28 1.93 2.0
Outer Diameter:   10.3mm        Impedance:    50Ω
Inner Conductor:   2.74mm Solid Copper or Cu over Aluminium
Outer Sheild:   Bonded Aluminum Foil + Tinned Copper Braid
Dielectric:   Physical Foam Polyethylene

There are many suppliers that manufacture coax cables to the ®LMR series specification.
Some suppliers cut corners, producing sub-standard coax which does not conform.
Our High Quality Coax

Fully Tinned Copper Outer Braid
- Resist corrosion and electrolysis
- Strong mechanical connection
- Lower loss over long lengths

Greater than 90% Braid Coverage
- Lower signal loss
Bonded Foil Second Shield
- Consistent Impedance

Correct Inner & Outer Conductor Diameter
- Correct impedance.

Foam Polyethylene/Air Dielectric
Cheap Poor Quality Coax

Bare Copper Outer Braid
- No Corrosion resistance
- Weak mechanical connection

Less than 75% Braid Coverage
- Signal loss by radiation
Loose Foil Second Shield
- Inconsistent Impedance

Undersized Inner & Outer Conductor Diameter
- Loose fit to crimp connectors
- Poor impedance match

Solid Polyethylene Dielectric
- Higher signal loss

LMR400 vs LMR240 coax cable loss ®LMR is a registered trademark of Times Mircowave Systems USA



    SMA male plug SMA male plugSMA female socket SMA female socket


    LMR400 LMR400

Specification Data (KSR400_wbs.pdf, 531 Kb) [Download]


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