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The Graveyard - Products No Longer Supported => DIR-655 => Routers / COVR => Europe DIR-655 => Topic started by: ryan14 on November 16, 2010, 06:07:09 AM

Title: Why 3 antennas?
Post by: ryan14 on November 16, 2010, 06:07:09 AM

Why does this wifi router have 3 antennas and the following wifi router only has 2 antennas?:

http://www.dlink.com/products/?pid=681 (http://www.dlink.com/products/?pid=681)

I read that more antennas means more simultaneous transfers, but I don't know what this means. Anyone know what advantage 3 antennas have over 2?

And how many 802.11n radios does the DIR-655 have?

Title: Re: Why 3 antennas?
Post by: Breman on November 20, 2010, 10:31:08 PM

There are 2 radios in the DIR-655 (1 for 2.4 GHz and 1 for 5GHz). However the 5GHz radio only uses one antenna and is only accessible on either an 802.11a or 802.11n wireless adapter and has more limited range. The other 2 antennas are for the 2.4GHz, this is to give you better coverage area for 802.11g and 802.11n. The later model was able to incorporate newer technologies to allow an antenna to use both 5GHz and 2.4GHz on one antenna without degradation of signal.

Title: Re: Why 3 antennas?
Post by: kthaddock on November 21, 2010, 05:54:01 AM

Quote from: Breman on November 20, 2010, 10:31:08 PM

There are 2 radios in the DIR-655 (1 for 2.4 GHz and 1 for 5GHz). However the 5GHz radio only uses one antenna and is only accessible on either an 802.11a or 802.11n wireless adapter and has more limited range. The other 2 antennas are for the 2.4GHz, this is to give you better coverage area for 802.11g and 802.11n. The later model was able to incorporate newer technologies to allow an antenna to use both 5GHz and 2.4GHz on one antenna without degradation of signal.

Well................Have you heard about MIMO technics ? otherwise you don't get 300mbt speed.
And you DIR-655 have only 2,4GHz. Do your investigation before posting !

Title: Re: Why 3 antennas?
Post by: davevt31 on November 21, 2010, 09:46:04 AM

Quote from: Breman on November 20, 2010, 10:31:08 PM

There are 2 radios in the DIR-655 (1 for 2.4 GHz and 1 for 5GHz). However the 5GHz radio only uses one antenna and is only accessible on either an 802.11a or 802.11n wireless adapter and has more limited range. The other 2 antennas are for the 2.4GHz, this is to give you better coverage area for 802.11g and 802.11n. The later model was able to incorporate newer technologies to allow an antenna to use both 5GHz and 2.4GHz on one antenna without degradation of signal.

Wow, sorry but thats not even close to the reason.  The 655 does NOT use 5 GHz at all.