Asus rt n66r @ 80$ newegg -'refurb.
- Thread starter chetansha
- Start date
I thought we're legally not allowed to import refurbished computer equipment.
As per the Wireless N standard, each antenna can be used for one 150Mbps stream. 3 x 150Mbps streams = 450Mbps. 450Mbps on 2.4GHz + 450Mbpz on 5Ghz = 900Mbps, which is what the router advertises its speed as.
Or they could use antenna diversity or beamforming where all 3 antennas are used for one single 150Mbps stream to improve signal quality/range. Its all down to the firmware/WLAN chip on how its used.
Sure. I had reported the other PM to the market mods for their views. His threads were trashed.
How many streams is a function of the radio chip used. Nothing to do with number of antennas.
Again, this is down to how the antenna is constructed and not the number of antennas.
It's down to the WLAN chip how many streams are used.
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.. i.e. 3 streams. A stream can either transmit or receive. Stream direction is not exactly pre-defined as you imply - especially not in the N66U which is 3T:3R.
MU-MIMO is only promised in 802.11ac devices.
On the contrary, if done right it does mean better range. Adding more power is a brute-force way of extending range at the expense of signal clipping for clients closer to the router.
That was implied when I said each antenna "can" be used for a stream (by the underlying WLAN chip), which BTW is the case in the N66U. And if not they are used for antenna diversity as I already mentioned.
A WLAN chip which supports 3 streams cannot use it without 3 antennas.
An 'antenna' can be comprised of multiple elements i.e. multiple antennas. I suggest reading up on beamforming and diversity to realise how multiple antennas can have a combined effect on the signal.
If you want to nitpick - features on the WLAN chip are utilised only with correct firmware implementation. I have seen instances where proprietary WLAN radio techniques are not functional in third party firmware.
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Dear Chetan Shah,
We have great news! Your package, order no.: xxxxxxxxx has arrived in our warehouse and has been dispatched to India today.
Item type: router
Item Description: coupon code:- EMCPHHP232,
ASUS RT-N66R Dual-Band Wireless-N900 Gigabit Router Manufacturer Recertified IEEE 802.11a/b/g/n, IEEE 802.3/3u/3ab
qty1
We have great news! Your package, order no.: xxxxxxxxx has arrived in our warehouse and has been dispatched to India today.
Item type: router
Item Description: coupon code:- EMCPHHP232,
ASUS RT-N66R Dual-Band Wireless-N900 Gigabit Router Manufacturer Recertified IEEE 802.11a/b/g/n, IEEE 802.3/3u/3ab
qty1
'can' isn't as clear as i would prefer. What purpose does it serve.
Let's illustrate this with external antenna models as you can actually see the antennas.
For a one antenna model. What is its fastest speed ? N150
send & receive both work with the same antenna, this is what limits the speed from going any faster. You won't find any N300 router with a single antenna.
Take a two antenna model. What is its fastest speed ? N300
Now send & receive both have a dedicated antenna. yet two streams are sent with one antenna. So its not necessary that each antenna corresponds to a single stream. Now you can have 3 antenna N300 models as well. here each stream has a dedicated antenna.
You cannot find a N450 with just two antennas. But a N300 may have 3 antennas though not strictly necessary. So why have 3 in that case. To support more clients.
Take a 3 antenna model. What is its fastest speed ? N450
yet if antennas strictly correlated with streams then there should in reality be four antennas instead of 3. We ain't seen no 4 antennas N450 model. You don't need 4 antennas to do N450. It gets done with just three. 2 send & 1 receive.
This is what you'd think but i recall tim mentioning 2 send and 1 recieve with N450 models.
More than three antennas can be used in this case and it happens with models with internal antennas. Fancy stuff on the circuit board.
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The purpose is to show the versatility of an antenna - it can be used for scenario A, it can be used for scenario B, it isn't a fixed scenario. Its not about what you prefer, its about what it is
2 streams can NOT be sent by a single antenna. You have just turned the entire Wireless N/MIMO concept on its head!
This is why I cannot continue this discussion till you figure out streams. Sorry I am not a professor handing out lectures here
Edit: I have just realised you are repeating the same mistake you made in the repeater thread. Its a pity that even after being corrected then, you have chosen ignorance. Let me repeat it once more - Wireless N is NOT full duplex : a radio chip does NOT transmit and receive at the same time.
As I already said, multi-user MIMO is NOT part of 802.11n.
Incorrect. Anything more than 1 antenna can be used to achieve diversity. This is odd, I vaguely recall even you promoting N routers and its multiple antennas for better signal quality. It is not restricted to models with internal antennas. There are outdoor antenna installations harnessing these concepts and I hope you know they do not use PCB antennas!
P.s.: I must thank blr_p for further reinforcing concepts. If a delusional person doesn't come along once in a while stating the earth is flat, we would never understand why it is indeed round
P.s 2:
I should clarify that the 5GHz band uses an additional 3 antennas, for a total of 6 antennas. Since there are only 3 antennas externally visible on the N66U, I'm guessing they're using a mix of internal antennas for aesthetic reasons.
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Define those scenarios.The purpose is to show the versatility of an antenna - it can be used for scenario A, it can be used for scenario B, it isn't a fixed scenario. Its not about what you prefer, its about what it is
I still maintain my stated position in that repeater thread. Its a pity the OP never got back to us on which positioning of the repeater got a better signal. Tim had shown this in his articles that i was unable to find.
I understand there is no full duplex. Its simplex.
So what is the difference between a 2-antenna N300 vs a 3 antenna N300 router.
What purpose does the 3rd antenna serve in a N300 router ?
As *already* stated twice, and now for the third time :-
Scenario A : can be used for a distinct stream
Scenario B : can be used for antenna diversity
Scenario B explains your query :-
The third antenna is for antenna diversity.
To quote the specs from the TP-Link WR1043, 3 x 3 : 2 . 3 antennas can transmit, 3 can receive, 2 streams can be handled. Antennas are not "reserved" exclusively for transmit/receive like you said. When 2 streams are being handled through 2 antennas, the 3rd antenna can assist one of those antennas/streams and help boost link quality. Even further, if only 1 stream is being handled, the remaining 2 can assist that one antenna handling the stream.
A 2 antenna N300 can also use antenna diversity, but at the expense of dropping down to a single stream. The 3 antenna N300 helps alleviate the need to drop the second stream if possible.
Because you have not really understood half duplex and time sharing. Google these 2 terms, do the calculations for an ideal link and get back.
maddy_in65
Explorer
I am intersted in one. What would be the final price if i order one.