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ANT-140-020 SMA/M to N/M

SMA-Male to N-Male Coax Antenna Extension Cable (Select Length >> 10ft, 25ft, 36ft, 50ft, 3ft)

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SMA-Male to N-Male Coax Antenna Extension Cable (Select Length >> 10ft, 25ft, 50ft, 3ft)



  • High performance coaxial extension cable for 3G/4G/LTE cellular broadband and GPS applications
  • Connects from SMA equipment (e.g. modem, router, booster) to N connector based antennas
  • Top quality ultra-low-loss 50 ohm coax cable for maximum RF reception and transmission
  • Commercial grade quality components for maximum toughness and durability 
  • Heat shrink tubing on both connectors
  • Rated for all climates and conditions and can withstand the rigors of outside use (not for plenum or direct burial applications)
  • Use for stationary, temporary, portable and mobile vehicle applications
  • *NOT* for use with Wi-Fi (RP-SMA) or video (cable/satellite/TV) devices


Cable Assemby Specifications - SMA-Male to N-Male

Impedance: 50 ohm
Connector 1: SMA-Male (Inline Plug) - Gold Plated
Connector 2: N-Male (Inline Plug) - Nickel Plated
Cable:  10 Foot -- LMR195 (RG58-size) coax cable - 3/16" in diameter
            25 Foot -- LMR240 (RG8X-size) coax cable - 1/4" in diameter

            36 & 50 Foot -- LMR400 (RG8-size) coax cable - 7/16" in diameter


Use to extend the locaton of 3G/4G/LTE cellular devices such as:

Cellular Antennas LTE Antennas 4G Antennas 3G Antennas
Cellular Modems LTE Modems 4G Modems 3G Modems
Cellular Routers LTE Routers 4G Routers 3G Routers
Signal Amplifiers LTE Amplifiers 4G Amplifiers 3G Amplifers
Cellular Phones LTE Phones 4G Phones 3G Phones


Coaxial Cable Assembly Loss

Attenuation or loss is a key specification for all coax cables. The function of a coax cable is to transfer radio frequency power from one point to another, however, some power is lost along the length of the RF cable and through the connectors due to noise, cable imperfections, resistance and other factors. The power loss caused by a coax cable is referred to as attenuation and is defined in terms of decibels per foot at a given frequency. 

The key elements which affect cable signal loss are:

  • length of the cable
  • shielding (diameter) of the cable
  • number of connectors
  • quality of the cable assembly components 


For short distances (10 feet or less), the signal attenuation at 3G/4G/LTE frequencies is negligible for most applications, so LMR100 or LMR195 sized coax is appropriate.  At longer distances, thicker coax cables are required to minimize signal loss.  To prevent excessive signal loss, shorter cables should NOT be linked together to make a longer cable.  It is best to use a single cable whenever possible.  It is also acceptable to use a thick cable for the long portion of a cable run and a short thin cable to connect to equipment or antennas, but always try to minimize the total cable length and number of connectors. 

Proxicast's coax extension cable assemblies are constructed with top quality extremely low-loss cable and gold plated connectors.  Each cable assembly is fully tested when manufactured.  Proxicast recommends LMR195 coax for assemblies up to 10 ft, LMR240 for lengths up to 25 ft and LMR400 for lengths up to 50 ft. Custom cable assemblies are also available by contacting Proxicast with your application requirements. 


Total Cable Assembly Signal Loss:  (Including Connectors)

  10 Feet 25 Feet 50 Feet
Frequency LMR 195 LMR 240 LMR 400
700 MHz 1.1 dB 1.9 dB 1.9 dB
900 Mhz 1.3 dB 2.1 dB 2.2 dB
1700 Mhz 1.8 dB 3.0 dB 3.1 dB
1900 MHz 1.9 dB 3.2 dB 3.3 dB
2400 MHz 2.1 dB 3.6 dB 3.7 dB
2700 Mhz 2.3 dB 3.8 dB 4.0 dB
5000 MHz 3.2 dB 5.3 dB 5.6 dB
5800 MHz 3.4 dB 5.7 dB 6.1 dB


RF Connectors

SMA Female jacks are now the most common RF connector used on 3G/4G/LTE cellular modems, routers and signal amplifiers; some devices may also use N, FME, SMB or other connectors - check with your equipment manufacturer. 

Many indoor cellular antennas have SMA Male plug connectors; most outdoor antennas have either N-Male or N-Female connectors.

RP-SMA (Reverse Polarity) connectors are commonly used on Wi-Fi equipment, including devices that combine cellular and Wi-Fi radios.  SMA and RP-SMA connectors will not mate. 

Video equipment (cable TV, satellite TV, closed-circuit TV, etc) often uses "F" connectors - these are similar to SMA connectors in size and appearance but they will not mate with SMA connectors.  Also, most video systems require 75 ohm coax cable rather than the 50 ohm cable used for RF.

Please see the photo gallery above for close-up pictures of the exact connectors on this coax extension cable and carefully note the gender of the connectors that you need to ensure male-to-female mating. 

Note: All outdoor coax connections should be weather-proofed to minimize damage caused by moisture in the connectors or cabling.  Use our Self-Bonding silicone tape (ANT-900-002) for fast and easy connection sealing.


Proxicast coax extension cables are compatible with the Proxicast LAN-Cell and PocketPORT 3G/4G/LTE cellular routers. They are also compatible with most cellular equipment including 3G/4G/LTE modems and routers from Airlink, Asus, CalAmp, Cisco, Cradlepoint, Digi, Huawei, Mofi, Multi-Tech, Netgear, Netcomm, Novatel, Option, Pantech, Pepwave, Proxicast, Sierra Wireless, Sixnet/Red Lion, Teltonika, Verizon Wireless, and many more. They are also mostly compatible with signal booster/amplifiers from Cellphone-Mate, SureCall, weBoost, Wilson, zBoost and others.

Proxicast cables and parts can be used for industrial, commercial and Internet Of Things (IOT) applications such as: SCADA, Telemetry, Machine-To-Machine (M2M), Remote Data Collection, Remote Monitoring & Diagnostics, Remote Control, PLCs, RTUs, Temporary Locations, Mobile & Stationary Hotspots, Internet Anywhere, Video Surveillance Systems (Cameras, DVRs, NVRs, etc...), Alarm Systems, Traffic Control, Police, Fire, EMS, Medical, IMS, Homeland Security, & Disaster Response, Vehicles, Marine, Aviation, Automated Teller Machines (ATMs), Point-of-Sale (POS), Kiosks, Vending Machines, Gaming Machines, Digital Signage, and more

Antennas and cable assemblies are not returnable unless defective.

Part #: ANT-140-020