topic How many Coaxial Cable(s) per Directional Antenna in Wireless

How many Coaxial Cable(s) per Directional Antenna

khan300 — Sun, 04 Jul 2021 08:22:20 GMT

Hi,

I was wondering I have a Directional antenna (AIR-ANT2588P3M-N) for which i need to connect to my AP (

AIR-CAP1552E-E-K9)

My question is How many Coaxial Cable (AIR-CAB005LL-N) should I use for my AP? 1 or 3 ? I think it should be 1 per Antenna but the below Cisco Doc confuses me which says i should use 3 ? Please help

Note Coaxial cable loses efficiency as the frequency increases, resulting in signal loss. The cable should be kept as short as possible, because cable length also determines the amount of signal loss (the longer the run, the greater the loss).

Cisco offers low-loss 5 ft. and 10 ft. coaxial cables, parts AIR-CAB005LL-N and AIR-CAB010LL-N, respectively, for connection from the antenna to the access point. These cables have one straight male type-N connector and one right angle male type-N connector. To use all of the ports on the AIR-ANT2588P3M-N three cables will be needed.

How many Coaxial Cable(s) per Directional Antenna

David Ritter — Wed, 04 Dec 2013 18:23:23 GMT

The AIR-ANT2588P3M-N is 3 antennas in one.. one antenna for each port of the 1552, so yes you need 3 coax feeds.

How many Coaxial Cable(s) per Directional Antenna

khan300 — Wed, 04 Dec 2013 18:26:34 GMT

So i have 2 directional antennas,meaning ill need 6 Coax cables ? i.e ill need to purchase

AIR-CAB005LL-N x 6 ?

Re: How many Coaxial Cable(s) per Directional Antenna

Leo Laohoo — Wed, 04 Dec 2013 19:27:57 GMT

Remember, the LONGER the cable (connecting the AP to the antenna), the HIGHER the signal loss.

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Re: How many Coaxial Cable(s) per Directional Antenna

David Ritter — Wed, 04 Dec 2013 20:09:55 GMT

That would be correct. Since these are 11n devices, you would use one antenna on each port to support 3x3 streaming.

However, if you shut down 2 tx/rx ports and just used the system in 11a or 11g modes then only 1 cable would be needed on each 1554. Leo does make a valid point, if you mount your 2588 above the 1554 on a pole the short coax feeds should be fine. There is however, no magic in the cables that Cisco is providing. I suspect they are just LM400 class items with N male crimp connectors.. Such combination should be available from many places..

Re: How many Coaxial Cable(s) per Directional Antenna

khan300 — Fri, 06 Dec 2013 13:50:26 GMT

So if I use 1 cable per Antenna, it will NOT work ?? I have to use 3 cables per antenna ?