LMR-400 premium ultra-low-loss coaxial extension cable, outdoor rated - SMA-male to SMA-female
LMR-400 premium ultra-low-loss coaxial extension cable, outdoor rated - SMA-male to SMA-female
LMR-400 premium ultra-low-loss coaxial extension cable, outdoor rated - SMA-male to SMA-female
LMR-400 premium ultra-low-loss coaxial extension cable, outdoor rated - SMA-male to SMA-female
LMR-400 premium ultra-low-loss coaxial extension cable, outdoor rated - SMA-male to SMA-female
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  • Load image into Gallery viewer, LMR-400 premium ultra-low-loss coaxial extension cable, outdoor rated - SMA-male to SMA-female
  • Load image into Gallery viewer, LMR-400 premium ultra-low-loss coaxial extension cable, outdoor rated - SMA-male to SMA-female
  • Load image into Gallery viewer, LMR-400 premium ultra-low-loss coaxial extension cable, outdoor rated - SMA-male to SMA-female

LMR-400 premium ultra-low-loss coaxial extension cable, outdoor rated - SMA-male to SMA-female

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Genuine LMR-400 cable from Times Microwave for extremely low signal loss in high-frequency applications, such as 4G/5G routers, WiFi and microwave radio. The ultra low attenuation of <0.36dB per metre below 6GHz, and <0.13dB below 1GHz means that almost no signal is lost in the cable. The tough PE jacket resists UV and provides excellent durability in harsh environments.

This cable is a great choice as extension leads for our Bluespot 4G/5G antennas.

This cable is a direct replacement for RG-8 and other 0.400" / 10mm jacketed low-loss coaxial cables, and is a significant upgrade from RG-58 and RG-174. We recommend this cable for Helium / HNT mining (and other 868Mhz applications), outdoor 4G/5G antennas, and WiFi antenna exceptions as the highest performing cable that's a reasonable thickness and relatively easy to bend.

  • Please note that while this is the “ultra flexible” variant, this cable is still quite stiff, intended for permanent installations. You will need appropriate cable support or clips.
  • Outdoor connections must be taped with self-amalgamating tape to prevent water entering at the connectors and damaging the cable.
  • Made in the UK.
Generic name  LMR-400
Connector A SMA-male (note, this is different to RP-SMA)
Connector B SMA-female
Length 3m, 5m, 10m
Insertion loss ≤0.087dB per metre @ 433Mhz;
≤0.126dB per metre @ 868Mhz;
≤0.142dB per metre @ 1090Mhz (ADS-B);
≤0.186dB per metre @ 1800Mhz (4G);
≤0.217dB per metre @ 2.4GHz (WiFi & 4G);
≤0.267dB per metre @ 3.5GHz (5G);
≤0.355dB per metre @ 5.8GHz (WiFi)
Impedance 50 Ohm
Capacitance 78.4pF per metre 

Velocity of propagation
0.85
Conductor Copper-clad aluminium, solid, 2.74mm
Shield Aluminium foil + copper braiding
Dialectric isolation >8000V
Dialectric Foam PE
Jacket PE
Working temperature -40℃ to +85℃
Minimum bend radius 25.4mm (fixed); 101.6mm (repeated)
Diameter 0.405" or 10.3mm