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Need Maximum Cable Length for External Antenna

Posted on 2004-04-16
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Last Modified: 2013-11-09
I have a piece of wireless equipment that I need to connect to an external antenna.  The output is 17dbm.  What is the typically the maximum cable length I can use for going to an external antenna without using an amplifier?
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Question by:geowilli
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wmilliga earned 125 total points
ID: 10847589


Not enough info to be sure. Typically you will see around a 4.5db loss over 150' with a good quality cable.

At around 100' you should be looking for the best quality cable possible, and don't go beyond 150'.

I am assuming  2.4GHz WiFi gear.
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Expert Comment

by:8tricks
ID: 10847617
Try to find out from the equipment manufacturer website. I think it is varies from different manufacturer and for dlink product i think the maximum length is 9m. Please take note, the longer the length, the weaker the signal strength. I think at only 4m the signal is reduced by 20-40%. So best not to use any cable to connect to external antena.
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