Which the most powerful wireless PCI card?


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jacob

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#1
i'm a bit dumbo in wireless network. so i guess i need help for you techies out there.

wanna get one wireless card for my peecee. pls recommend me one that has the POWER! to to give me the greatest signal strength. am looking for one long range one. thanks in advance for any replies.

;)
 

raincool2005

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Sep 10, 2005
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#2
i'm a bit dumbo in wireless network. so i guess i need help for you techies out there.

wanna get one wireless card for my peecee. pls recommend me one that has the POWER! to to give me the greatest signal strength. am looking for one long range one. thanks in advance for any replies.

;)
get Cisco Systems. :thumbsup:
 

leejay

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Sep 18, 2006
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#5
The most powerful is the SMC 2532W-B, but because it is too powerful, Singapore rejected it.

Usually the standard 802.11b/g (24 GHz) type of cards are used by most people. There is an up-and-coming WiFi standard 802.11n which can operate in either the 2.4GHz or 5GHz unlicensed bands. More advantages are:

Less crowding. There are only 14 channels in the 2.4GHz band. They overlap and they've long been crowded. Wireless phones, microwaves, bluetooth devices, and other wireless access points are blasting throughout this entire band, causing massive interference, especially in urban environments. For now, the 5GHz band is pretty much barren, even in big cities.
The 5GHz band should also be slower to fill up as the 5GHz unlicensed band is significantly larger than the 2.4GHz one and thus contains many more 20MHz channels. This means, as more 5GHz-class devices churn out, there will still be less crowding and more opportunities to channel-bond.
Increased range. 802.11n takes advantage of spatial diversity (which has been quite standard in the mobile phone industry for years with the use of dual- and quad-pole antennas) to improve the signal strength at great distances.

Speed claims are for comparative purposes only. Actual speed varies with environment, equipment and other factors and will be less, while range may vary due to number of users, interference, transmission barriers (such as walls and building material), and other factors.

So, in the end, you still have to stick to the normal cards (they are good enough) sold in the market. Since every country has a bandwidth limitation for security purposes, it is very difficult for a lot of countries to liberalize their skies, although there are better devices out there. IEEE announced that it would release the second version of this draft (802.11n) for approval. As for fully compliant hardware, the Wi-Fi Alliance doesn't plan to certify anyone until later this year or even 2008.
 

jacob

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#9
The most powerful is the SMC 2532W-B, but because it is too powerful, Singapore rejected it.

Usually the standard 802.11b/g (24 GHz) type of cards are used by most people. There is an up-and-coming WiFi standard 802.11n which can operate in either the 2.4GHz or 5GHz unlicensed bands. More advantages are:

Less crowding. There are only 14 channels in the 2.4GHz band. They overlap and they've long been crowded. Wireless phones, microwaves, bluetooth devices, and other wireless access points are blasting throughout this entire band, causing massive interference, especially in urban environments. For now, the 5GHz band is pretty much barren, even in big cities.
The 5GHz band should also be slower to fill up as the 5GHz unlicensed band is significantly larger than the 2.4GHz one and thus contains many more 20MHz channels. This means, as more 5GHz-class devices churn out, there will still be less crowding and more opportunities to channel-bond.
Increased range. 802.11n takes advantage of spatial diversity (which has been quite standard in the mobile phone industry for years with the use of dual- and quad-pole antennas) to improve the signal strength at great distances.

Speed claims are for comparative purposes only. Actual speed varies with environment, equipment and other factors and will be less, while range may vary due to number of users, interference, transmission barriers (such as walls and building material), and other factors.

So, in the end, you still have to stick to the normal cards (they are good enough) sold in the market. Since every country has a bandwidth limitation for security purposes, it is very difficult for a lot of countries to liberalize their skies, although there are better devices out there. IEEE announced that it would release the second version of this draft (802.11n) for approval. As for fully compliant hardware, the Wi-Fi Alliance doesn't plan to certify anyone until later this year or even 2008.

wow that was quite heavy. pls give me time to digest:embrass:
btw tq!
 

lsisaxon

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Nov 29, 2004
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#10
does more antennas give you a longer range?
thanks for your reply.;)
No it doesn't. I use a Yagi antenna for range. More power doesn't mean better signal. it only means that the AP is able to read your signal better but doesn't guarantee the other way round.

The Yagi antenna is connected to an Edimax USB WLAN (EW-7318USg) with a connector for external antenna.
http://www.edimax.com/en/produce_detail.php?pd_id=8&pl1_id=1&pl2_id=44

I use this setup to access a nearby Wireless@SG AP from my office because my office network blocks many sites such as streaming radio.
 

jacob

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#12
thanks! for the info lsisaxon. did u built that antenna urself?

btw was wondering also is there any difference subscribing to singnet or qmax for their wireless@sg network although that may be connected to the same access point?
 

lsisaxon

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Nov 29, 2004
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#13
thanks! for the info lsisaxon. did u built that antenna urself?

btw was wondering also is there any difference subscribing to singnet or qmax for their wireless@sg network although that may be connected to the same access point?
Yup, built the antenna myself based on a commercial 6-element yagi design then tuned it in my office (we design mobile phone antennas). No difference. I can log on with both but since it's free, I signed up for a QMax account also because since I'm using their AP, I think it might be faster to authenticate during the log in. ;p
 

V

vince123123

Guest
#14
What's the range on that DIY antenna? Are you able to build one if we pay you?

No it doesn't. I use a Yagi antenna for range. More power doesn't mean better signal. it only means that the AP is able to read your signal better but doesn't guarantee the other way round.

The Yagi antenna is connected to an Edimax USB WLAN (EW-7318USg) with a connector for external antenna.
http://www.edimax.com/en/produce_detail.php?pd_id=8&pl1_id=1&pl2_id=44

I use this setup to access a nearby Wireless@SG AP from my office because my office network blocks many sites such as streaming radio.
 

lsisaxon

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Nov 29, 2004
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#15
What's the range on that DIY antenna? Are you able to build one if we pay you?
Haha... I don't know where the AP is.. ;p I measured it's about 7dBi. with more than 10dB front to back ratio.

I don't think I want to build another one but here's the link to the commercial antenna which I took the design from. Basically, I copied the spacings and retuned the lengths for resonance.

http://www.antennafactor.com/documents/ANT-2.4-YG6-N_Data_Sheet.pdf
 

V

vince123123

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#16
Hmm, I'm not versed in the technical area you described so unfortunately I'm unable to create it :(

I do note you mentioned 7dbi. This term has no meaning to me, but I do reclal seeing those offtheshelf antennas for linksys routers and the like, and they seem to also state 7dbi on the box. are these the same thing?

Haha... I don't know where the AP is.. ;p I measured it's about 7dBi. with more than 10dB front to back ratio.

I don't think I want to build another one but here's the link to the commercial antenna which I took the design from. Basically, I copied the spacings and retuned the lengths for resonance.

http://www.antennafactor.com/documents/ANT-2.4-YG6-N_Data_Sheet.pdf
 

lsisaxon

Senior Member
Nov 29, 2004
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#17
Hmm, I'm not versed in the technical area you described so unfortunately I'm unable to create it :(

I do note you mentioned 7dbi. This term has no meaning to me, but I do reclal seeing those offtheshelf antennas for linksys routers and the like, and they seem to also state 7dbi on the box. are these the same thing?
Yes, but those are omni directional, so it picks up signal from all around except upwards and downwards. I think the measurement I have may not be a correct figure for Yagi antennas because it's so directional.

You can try with the available antennas, they should be able to give something decent.
 

lsisaxon

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Nov 29, 2004
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#20
here's another pop up question. can i use a wireless router to connect to another access point?
If the router allows that. Then it's acting as a repeater.
 

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