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45 ft. Antenna extension coaxial cable RP-SMA Male to N-Female RFC-400 low loss


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This special low-loss RP-SMA male to N-Female extension cable is RFC-400 (LMR-400 equivalent) shielded. The cable is 45 feet and can be used to put an extension between an RP-SMA antenna connector on a RAK 2, Nebra, or Bobcat miner on one end, and the RAK N-Male style outdoor antenna, or another N-male antenna (this has N-female, so connects to N-male antenna).

This cable is compatible with N-male outdoor antennas sold directly from RAK and Nebra. 

This cable is NOT compatible with the Rokland 8 dBi miner antenna, which has an N-female connector. If you need cable for the Rokland 8 dBi miner antenna, click here

We recommend this extension cable compared to some others online because it is a special low-loss cable (RFC-400 Low Loss 50 OHM). What does this mean? The antenna to which you will connect this to has a gain. Let's say for example you will be connecting this to an 8 dB gain antenna. As the cable in between the antenna and adapter gets longer, you will experience cable loss, which is a drop in the signal gain of the antenna. With low-quality unshielded extension cables, the huge drop in gain will mean a much lesser range. Our special low loss cable limits the cable loss factor and preserves the high gain of your antenna.

Made in USA. This cable is American made and manufactured for superior performance and quality control.

We do recommend RokTape to seal all outdoor connection points. 

Compare gain loss of this cable:

915 MHz application: -1.7 dB (Helium mining/LoRa device)
WiFi 2.4 GHz application: -2.9 dB (standard home WiFi networking)
WiFi 5 GHz application: -4.6 dB (dual-band 2.4/5 GHz WiFi to 5 GHz networks)

Compare this to a cheaper RG-58 shielded cable of the same length- the gain-loss would be -7 dB for 915 MHz, -13.5 dB for 2.4 GHz WiFi, and a whopping -23.8 dB for 5 GHz WiFi

That means standard RG-58 cables have over 4x times as much gain loss as this cable!

If you invested a lot in your antenna, it is worth the extra amount to get a 400-grade low-loss cable to maximize your antenna performance. This goes double for Helium mining- a higher loss cable means you may be getting less reach with your miner, and therefore mining much less.

Additional Features:

- Length: 45 feet
- Impedance: 50 OHM
- Frequency: all bands from 0-6 GHz, including 868-915 MHz LoRa, 2400-2700 MHz WiFi/ 5100-5900 MHz WiFi

- Compatible with 2.4 GHz 802.11ac, 802.11n, 802.11g and 802.11b WiFi standards, 915 MHz LoRa standard
- Compatible with many WiFi adapters & Helium miners with RP-SMA ports


1. I see 9m cables on eBay for only a few dollars with free shipping from China. How can you charge so much for just about the same length?

An antenna extension cable is not like a power extension cable you would use with an electric lawnmower. In other words, all antenna cables are not basically the same. When you use a cable in between the antenna and the WiFi adapter, the gain of the antenna decreases markedly. This is a factor known as cable loss. The $3 and $4 RP-SMA extension cables in abundance on eBay have no low loss shielding. Using them will cause significant gain loss- so much so you may find your factory antenna connected directly to your adapter will begin to work better than your expensive high gain outdoor antenna. To limit gain loss, you need a thick shielded low loss cable, from a trusted manufacturer like ALFA Networks. It has special low loss shielding to limit your gain loss and simply works much better than cheap cables that have no low loss shielding.

2. I already have (or want to buy) an external antenna for my wireless adapter, and I want an extension cable so I can put my antenna further away from the adapter. How do I know if this is the right extension cable for me?

Check with the maker or seller of your antenna to find out what type of connector it has. As a rule of thumb, you want to get an RP-SMA male to RP-SMA female extension cable when the antenna you have can connect directly to the RP-SMA connector on your wireless adapter if you wanted it to. That would mean your antenna also has an RP-SMA connector, and this would be the right cable for you. If your antenna has another type of connector, meaning it is not possible for you to connect it directly to the RP-SMA connector on your wireless adapter, then please contact us so we can help you locate the right cable for your needs. Additionally, we always recommend getting as close to the length you need as possible. If you are only trying to go 10 feet, don't buy a 30-foot cable as you will have more gain loss.

Warranty & Support:
Telephone and Email/Live Chat Support (Click Here)

State sales tax of 7% will be added to FLORIDA purchases only. There is no sales tax for any other state.

Return Policy: Coaxial cable may be returned for refund if new within 30 days of delivery. Used coaxial cable cannot be returned except in case of defect. We only cover return shipping in case of wrong item shipped. Returned orders with free shipping selected will incur a 15% recovery fee to help us recover some of the original shipping cost, unless the item is defective or incorrect. Expedited shipping charges paid are non-refundable. For bulk purchases, see our bulk purchase return policy here.

Customer Reviews

Based on 10 reviews
Kerry Cook
45ft. Rfc400 cable

If theres any line loss, I cant detect it. Rust from my basement to my roof and quadrupled my earnings with a 5.8dbi antenna.


These folks are all about customer satisfaction and they deliver!

alex DeBord
Geography far more important than antenna

I went from stock 4dbi bobcat antenna inside above a livingroom window to this antenna on the roof about 8ft above house with clear line of sight everywhere. I think I maybe get more stable coverage in bad weather but my monthly coin output is trending to be about .75 of a coin higher than before. We shall see if time changes anything.

Also the mounting system not great. Had to switch to bigger rings to fit 1.5-2" bar diameter.

Louie Arena
Great Cable for Outdoor Antennas

Very sturdy cable, and a good length to run a cable up to the roof. Still syncing my helium hotspot so we'll see how well the antenna performs and what kind of loss I'm getting, but I'm hopeful

cable does what it says

45 ft long cable, has the right connectors / ends. appears to be functioning so far. rokland has been good so far!