3 x Dual-band antennas vs 6 uni-band antennas

Hello guys,
Could you give me an explanation, what is the main reason? Why it is better to use 3 x 2.4/5GHz dual-band antennas versus 6 uni-band antennas ( I mean 3x 2.4 GHz and 3 x 5GHz) ?
Or maybe I'm wrong?

Ohhhh ... You're talking about the G2 WAPs.
Yes. Dual band antennas is a no-brainer because you don't want to make your WAP look like a porcupine.
Choosing between individual antennas and a multi-band antenna will depend entirely on how you want to use the WAP. For low-gain antenna, you can use rubber ducks/duckies/ducklings but with slightly higher gain antennas, I'd prefer to use a patch antenna.
The diversity of the 802.11ac patch antennas will depend on the growth (in sales) of the WAPs themselves. Most of the antennas come from manufacturers like Terrawave so if you need a patch antenna and Cisco doesn't have them, check out Terrawave and you'll probably find some there.

Similar Messages

Can you install a single band antenna on dual band ap connectors

Hello,
just a question, what happens if you install single band antennas onto dual band ap connectors, would it work?
greets
J.

It is not only possible its actually one of the ways to use some of the antennas released for 1552-series. There are antennas that are released for the use with only single band while 1552E has a dual-band antenna feeder.
http://www.cisco.com/en/US/prod/collateral/wireless/ps5679/ps11451/data_sheet_c78-641373.html
http://www.cisco.com/en/US/docs/wireless/antenna/installation/guide/ant5114P.html

Dual-band Omni External Antenna

Hello,
Can someone recommend me a dual-band omni antenna for connection to a Cisco 3600? For use indoors.
I have found this:
http://www.cisco.com/en/US/docs/wireless/antenna/installation/guide/ant2544v4m-r.html
But it seems a bit overkill for what I need. All I want is a small profile indoor antenna I can connect to the AP.
I require the antenna so that the AP can be mounted vertically with the antenna sticking out the top so as to create the correct coverage pattern
Thanks

http://www.intermec.com/public-files/product-profiles/en/CiscoAntennasAccessories_spec_web.pdf
Hi Kashif,
This document link you've posted is already OUTDATED. All the antenna's in this PDF are valid up to the AP1250. The antenna required for the 3600, as what is stated by the OP, is totally different.
Antennas for the newer generation of Cisco APs which are dual-band radios, go here.

1 Dual-Band Antenna vs. 2 Single-Band Antennas

Hey guys-
I was wondering if I was going to implement a 2504 with a 1550 series AP, would it be better to go with 2 Single-Band Antennas or 1 Dual-Band Antenna (which would mean I'd have to change the AP from an EU to an E).
What is the difference? I am thinking it has something to do with MIMO, correct?
This will basically be used to provided wireless connectivity outdoors to a single user. I am unsure what the NIC specs will be for the client, but I am saying its safe to say 2.4. Although the fact that I do not know, is what is making me purchase support for both bands.

Well it depends on what you are wanting to do. With the EU, you have 6 eternal antennas one for each radio. Now if you have a long backhaul and the omni's will not be adequate for that, then you use the EU with external patch antenna. So that is really the difference, the EU allows you to have a separate antenna type for each band.
Cisco Aironet 1552E/1552EU External Antenna Access Points
The Cisco Aironet 1552E/1552EU Outdoor Access Points are the standard models, dual-radio system with external antenna ports that are compliant with IEEE 802.11b/g/n standards (2.4 GHz) and 802.11a/n (5-GHz). The 1552E has three external antenna connections for dual-band omni or directional antennas. The 1552EU has six external antenna connections, three for 2.4 GHz and three for 5 GHz antennas, that support omni or directional antennas. They have Ethernet and fiber Small Form-Factor Pluggable (SFP) backhaul options, along with the option of a battery backup. These models also have a PoE-out port that can power a video surveillance camera or other devices. Highly flexible models, the Cisco Aironet 1552E/1552EU are well equipped for municipal and campus deployments, video surveillance applications, mining environments, and data offload.
Thanks,
Scott
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1600/2600e AP mesh/bridge with dual band antennas

Has anyone setup a 1600/2600 as a wireless mesh/bridge with the dual band antennas? I'm curious to see how well they work with the dual band antennas and how well the 5Ghz backhaul works in conjunction to the 2.4Ghz client side.

Well for outdoor, you need to have the external antennas since the AP's will need to be in an enclosure. You also have to make sure that the temperature doesn't go beyond the data sheet specs for operating temperature conditions. Outdoor MESH AP's is really the way to go as it can be costly to us an indoor AP and retrofit it to be outdoors.
Thanks,
Scott
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How can I get Wireless N 5MHZ Capabilities Dual Band up to 300MHZ on my DV7 Laptop?

How can I get Wireless N 5MHZ Capabilities Dual Band up to 300MHZ on my DV7 Laptop?
Question for 4/18 experts ...
Or specifically, how can I replace my wireless card on a DV7-6B32US and upgrade to Intel Centrino 6230?
I have a relatively new DV7-6B32US puchased on 11/2011. Still under warranty. purchased 2 of the laptops. (also own 3 hp desktops and 1 HP All in One)
Existing card is wireless N but does not support 5GHZ or dual band. It is Broadcom 4313 wifi card and I am just realizing that the Broadcom card does not do the dual band 5GHZ wireless N. I have Linksys e4200 router which supports 5GHZ and dual band speeds up to 300 Mbps.
I called tech support and with their help identified Intel Centrino 6230 as the correct upgrade, and with their help ordered 631956-001. In the Maintenance Manual for DV7 laptop, this part number was listed for Intel Centrino 6230. Turns out HP sends an Intel Wireless N 1030 card, which is no better than my existing card. I called HP and they acknowledged that some manuals use part number 631956-001 for Centrino 6230 and some use 631956-001 for INtel 1030. So HP support said they would give refund but case manager was of no help in solving the upgrade problem. Said it was unavailable but here is your money back.
So after more searching, I see others have used part number 636672-001 to order Intel Centrino 6230, specifically for HP ProBook 4530s, 4230s, 4730s. And if I use part number 636672-001 and go thru parts store at HP, I can purchase it.
But will it work??
First, will the Intel Centrino 6230 with part number 636672-001 from HP parts, work in my HP DV7-6B32US, even though the part number is NOT listed in the Maintenance and Service Guide for my specific laptop. I see postings about whitelists and changing bios, etc, and am hoping someone can provide some guidance. I have been thru 2 tech support calls and one case manager and have gotten 3 different feedback from HP, from yes it will work and ordering the part, to buy it on amazon, to it will not work and here is your money back.
Second, I see some postings about Centrino 6230 and multiple antenna's. When I replaced the Broadcom 4313 with the Intel 1030 card, I simply unattached 2 wires and reattached the wires. And it worked. I am wondering if the reason HP doesn't list the 6230 card for DV7 is that DV7 does not have the antennas required to support 6230. Does the Centrino 6230 require 3 antennas?
Thanks for any suggestions. The existing cards do work but I paid extra for the Linksys e4200 Router and just assumed a winter 2011 $700 laptop from HP would use the latest wireless n technology, otherwise I would just keep existing cards.

I have went thru the exact same problems trying to upgrade the wireless card in my DV7. It is very frustrating that the wireless card can't be upgrade to one that supports 5Ghz. Here is my post from the network forum. http://h30434.www3.hp.com/t5/Wireless-Internet-Home/Unsupported-Wireless-LAN-6230/td-p/1419595 Doesn't sound like it is possible to upgrade to the Centrino 6230 without it being added the the "white list". Sound like HP doesn't update the list after shipping the notebook. I feel your pain. HP needs to help out the consumer in upgrading the wireless cards. I see we are not the only ones that have had this problem.

Airport Extreme Dual-Band Base Station Is excessively slow

Let me start off by stating this is my first apple support discussion and I have no experience in these forums but rather forums elsewhere.
My Airport Extreme Dual-Band Base Station is completely updated as of DEC. 30, 2012 running version 7.6.1 and I have the latest airport utility, so bare in mind some of the previous fixes I've Read seem unavailable to my setup
Our household has 7-13 of the following devices connected in a 24 hour average:
5-6 iPhones all running iOS 6 (1, iphone 3gs; 2-3, iPhone 4; 2, iPhone 5)
1 iPad 2 wifi only running iOS 6
2 MacBook Pro 13" early 2012 models one running mountain lion and the other running lion
1 mac mini early 2011 model running mountain lion server and is connected outside the network as a public server
1 Apple TV latest model(1080p) latest updates
1 LG 47" 1080p 3D TV
3 blueray players
2 Windows 7 PC one a laptop and the other a desktop
1 HP All-In-One Printer
1 AT&T MyCell Antenna
My problem is as follows:
My network is running rather sluggish. the base station is getting at the very minimum good signal strength to all my devices most of them getting great signal, so I doubt it be the result of range. I've tried messing with the channels and radio settings but have yet to find a correct optimal settings. I've tried searching around these forums as well as in other areas and have not found a suitable solution. my apple TV lags and jitters a lot. I have trouble airplay to it because of what I've read elsewhere which is latency issues. I have no clue how to test latency. I have realized that it isn't a matter of noise in the area because noise doesn't pass 15% and signal is optimal in all areas. of where the devices are. I've noticed connecting my server directly gives me 47Mb/s as compared to the Ethernet connection of 32Mb/s so I am clueless as to a solution. I know that with my old router the wifi speeds were outstanding but that router kept disconnecting wifi clients and then reconnecting them. sadly this is happening again with the apple router. last night my iPad would not stay connected and our network had so much lag that I couldn't even load the youtube app let alone a video. also buffering takes an odd amount of time sometimes 3 minutes. for a 30 second video on youtube. I have no guest network active and I have a wpa2/wpa personal encryption set on the network. I could use some serious help. the people of my household have no problem returning the apple router but I think to urge otherwise. if I could get some help in a solution that would be fantastic.
Thanks in Advance,
Blaine Miller

Can you tell us whether your "modem" is a simple device with only one ethernet port or is it a "gateway", which is a combination modem/router with 3-4 ethernet ports?

Configuration for dual-band WLAN?

I have an X230T with Intel N-6205 and 2x2 antennas. AFAIK it is capable of parallel WLAN connection on both the 2.4 & 5 GHz for maximum bandwidth. How should I configure my WLAN to take advantage of this. Should both 2.4 and 5 GHz networks have the same SSID?
X320T running Windows 8 Pro x64

Actually, those settings I provided you are from my Intel Dual Band Wireless-N 7260 adapter so some settings are a bit different, but it should work for all Intel Wi-Fi cards.
rsbrux wrote:
"I also have a secondary router, whose 2.4GHz radio I had set to 20 MHz BW, as there are more other 2.4 GHz WLANs near it. ISTR reading that the narrower BW can actually yield improved throughput under such conditions, and the secondary router has no "auto" BW option. What do you think of this?"
P.S. If I understand "NS offload for WoWLAN" correctly, it seems to be enabled.
At least, the WLAN adapter appears to turn itself on, even with the laptop powered down and connected to a wired ethernet.
As billbolton pointed out, he is 100% correct that "The 2.4GHz WiFi band has become so congested with competing traffic in many densely populated locations that useful 300Mpbs connections are quite unlikely to be achieved."
Based on many networking articles, 300 Mbps is achieved through channel bonding (40 MHz) on both bands. Since channel bonding makes the channels wider, this would actually result to more overlapping with other channels from routers nearby on the 2.4. Channel overlapping should be avoided since it induces more interference thus making your ping spike often as well as frequent reduced throughput and link speed. On the worst case, you will experiece dropped connections. If you absolutely have to work on the 2.4 GHz band with a lot of neighors, you can leave the Wi-Fi adapter settings I provided to be the same, but you have to change the channel width on the router to 20 Mhz only for 2.4 GHz band and leave the 40 MHz channel width on the 5 GHz band. This would cut the speed to 156 / 150 / 144 Mbps on 2.4 GHz band only, but you only occupy 2 adjacent channels from the channel you're broadcasting instead of taking over more than half of available channels using 40 MHz. Like many networking articles online, 40 MHz is ideal for 5 GHz since very few people use that band and there are far more available channels to choose for the 5 GHz without overlapping with other channels nearby.
As for your PS note, the reason the WLAN adapter is awake while the computer is asleep is due to Intel Smart Connect Technology: http://www.intel.com/content/www/us/en/architecture-and-technology/smart-connect-technology.html
Lenovo Y470: i7-2670QM | 8 GB DDR3 1333 MHz RAM | Nvidia GeForce GT 550M | 500 GB 7200 RPM Seagate HDD | ASUS PCE-AC56 802.11ac Network Adapter | Windows 7 Professional 64-bit

Single 2.4g vs dual band

what are pros and cons of going with a high density 2.4g vs a dual band antenna?

I don't know if you should consider a 2.4 GHz design for any HD deployment. There simply isn't enough spectrum to properly service the depth of clients and there is no 40 Mhz 802.11n or 802.11ac on 2.4 GHz. You really limit yourself with 3 non overlapping channels.
Hope this helps ..

Wired throughput on dual band Airport Extremes

I wonder if anyone has put the dual band devices through their paces with the 5Ghz network and wide channels plus the 2.4 Ghz network at the same time. Since it has two radios, I'd expect it to be able to really route a lot of traffic, perhaps 300-350 Mb/sec through its gigabit WAN port, similar to the combined capacity of an older AE on 5 Ghz and an 802.11g Airport network. Is this wrong?
I have a three-room area of the school where there are sometimes more than 90 laptops are in use, half MacBooks, half iBooks. I have a 'square' original model AEn in each of the end rooms and an older dome-shaped AE in the middle room. All three non-overlapping channels are utilized, and all are set to 802.11g only. This has worked to balance traffic reasonably well, but it really gets slow sometimes. The AEn's take 40-45 clients each, and the older AE grabs a few.
I am thinking about replacing the two end room AEn's with new dual-band ones, use the same SSID for both frequencies, and set the 2.4 Ghz to be 802.11g. I understand this setup will cause my MacBooks to tend to the 5 Ghz, the iBooks only the 2.4 Ghz. If so, is the setting "802.11a/n - 802.11g only" the correct wireless setting? I am not sure why "802.11n - 802.11g only" is not an option, but we do not have any 802.11a devices that I know of, so that should not slow the network down.
Anyone with experience with this? I searched the forum pretty well, I thought, but maybe I missed something. Thanks.

Thanks Bob - I've thought about this. The guest area is on a different power phase so the ethernet over power option doesn't work. I'm looking at extending the WAN port using a bridge and set the second unit up to create a new network. I'll get the bridge to join the guest network. Double NAT won't be too much of an issue considering it's just to access the Internet.
The issue is related to the construction of my house - I have a metal roof and all of the walls have sisalation (aluminium backed insulation). If I were to connect an external antenna it'd probably fix the problem.
I must say that I'm a bit disappointed with Apple on this.
1. No easy access to antennas - an external antenna would most likely fix the problem.
2. Restricting the functionality of the guest network (impossible to extend properly, even with a wired connection!)
3. No filtering capability to control IP traffic
4. No Web interface to configure the unit.
- Mark E

Using a dual band router

I have read messages of people saying they have bought a dual band router. They use that instead of the actiontec for their wifi. The secondary router gives them better performance. Is this a good idea or a waste of money?

It would appear you have the dual antenna N band capable Actiontec MI424WR. This router will provide good signal strength in most dwellings and and will be twice as fast as a single antenna Actiontec B/G band router. I wonder if the folks who recommended an upgrade are doing so based on the performance of Actiontec routers of the same part number but with a single antenna and B/G band connectivity.

Simultaneous Dual Band AP?

I'm not terribly familiar with cisco's WAPs outside the small business models and I'm trying to find an "inexpensive" autonomous AP that supports 802.11n, simultaneous dual band, and internal antenna. Are there any comparison charts showing which access points support simultaneous dual band?
Thanks!

I see where it says that it 2.4 and 5.0 radios, but not that they can both be in use at the same time. Are all of the non-small business APs with dual radios capable of working on both frequencies at the same time?
Said who??? Single- or Dual-band radios work simultaneously. It doesn't make any logical sense if they don't.

Planned firmware update for previous dual band 2.4/5 'N' Airport Extreme ??

Hi, I purchased a Airport Extreme dual band 'n' router about 2 months ago. Now that the new generation has been released, is there a planned firmware upgrade available to previous generation users to move from the 'n' draft to the finalized 'n' specs? Also, is there any major changes from the n draft to the finalized n that improves performance, stability, etc...
Just curious want options, if any, people like me have?
Lastly, any chance I can bring in my APExtreme into the Apple store to get an upgraded antenna installed??

Now that the new generation has been released, is there a planned firmware upgrade available to previous generation users to move from the 'n' draft to the finalized 'n' specs?
Apple normally does not announce any firmware updates, so it would be pure speculation as to if and when they would provide one specifically for the finalized "n" spec.
Lastly, any chance I can bring in my APExtreme into the Apple store to get an upgraded antenna installed??
Since Apple has never (to my knowledge) offered an internal antenna upgrade for any of their wireless products, I don't think this would ever become an option. My guess is if it did, it would not be cost effective for you to go this route.

Dual band card - U400

I have upgraded to a dual band router. I was wondering if it is possible to replace the card in the U400 with a dual band card. I know it will fit based on the size/type of card but I didn't know if it had the correct antenna. I don't want to purchase and install the card to find out it isn't able to use both bands. Any advice would appreciated. Thanks!

hi perrinjcat,
Welcome to Lenovo Community Forums!
Lenovo System has a limited support for Wifi adapters it has a Whitelist of parts compatible and those parts are marked with an FRU number,
Here are the parts stated to be compatible on your system
Highlighted are the FRU Number,
NOTE: The WIFI card should be marked with the listed FRU.
Same part model with no FRU will not work.
Best Regards
Solid Cruver
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What are the differences between a 2nd generation Airport Extreme and a 5th generation other than dual band capability?

I have a 2nd generation and want to replace it with a 5th generation. Will it be worth it? Other than the dual band capability of the 5th gen, what is the advantage?

The 2nd Gen AirPort will support wireless speeds up to about 270-300 Mbps. The 5th Gen will go up to 400-450 Mbps.
But, not sure why you are looking at a 5th Gen AirPort when the Gen 6 runs circles around the Gen 5 in terms of speed capability and antenna performance. The 6th Gen antennas are up at the top of the tower for significantly better transmission capability and there are more of them as well.
With an "ac" capable computer the 6th Gen will get up to 900-1,000 Mbps. Otherwise, it will come in at 400-450 Mbps with a fairly up to date Mac.
The 6th Gen would be, and is a "no brainer" for me over the 5th Gen, but you may have your reasons.
Apple tends to introduce new models in June of most years, so if you are not in a rush, you will likely have an even better offering soon.

3 x Dual-band antennas vs 6 uni-band antennas

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