what is the best height for tower for antenna of 2.4GHz wireless ISP (last client distance is about 10 Km)?
465480
Will all depends on the contour of the land.  If nothing is in the way, then it could be low.  But to get over buildings, trees, hills, ect.. Probably atleast 150-200ft.
20052
Any Hawking attenna will work. They are great and extend the coverage of your router
396866
For long distance wireless you need 802.11-PRE-N standard.  This next generation wireless can be used to 700 feet (213m) inside and 1500 feet (457 meters) outside.  See the link below for some early product.  The new standard will be backwards compatible to your existing 802.11b/g access cards -- you just need to update the base station.
275610
Here's a good source:\n\nhttp://www.wlanparts.com
131655
If you do not move around much, and the AP does not need to provide service to a wider arc, I recommend a directional antennae.\n\nyou may find this website helpful:\n\nhttp://www.cantenna.com
599308
anything above dsl will be fine. 3mbps would be best.
14994
Check out this site here It gives step by step directions. He says it will give you a 3-5km range. That should give you roughly 1.5 miles or so.\n\nhttp://www.usbwifi.orcon.net.nz/\n\nBy the way it isn't omnidirectional, so you have to have a pretty good line of sight between antenna 1 and antenna 2.
14459
I agree that a Linksys is best, specifically WRT54G. I personally have one and love the features and the interface. It covers all the bases, although if you have a large area to cover with signal you may want to at a later date buy the huge Linksys antennas for the router. I have never used them but supposedly they greatly increase the range.
27336
In addition, you will have to raise the transceivers above the obstructions.  These signals are notorious for being "line of sight", and are easily obstructed.\n\nThe easiest way is to get a mast and mount it on the roof.  If that is not possible, look for a HAM radio antenna tower.  You can stack them as high as you need in order to get above the obstructions.\n\nIt does not take much to block these signals.  Even rain can prevent them from going through.  Ask anybody who uses DirecTV or Dish Network about that.
1176223
There are few things that can actually stop a wireless signal, one of which is certain types of aluminum. Another thing, for example, is direct distance in feet. A room "right next to it" could actually be a greater physical distance than the room above it.
173511
The WiFi band is broken down as follows:\n802.11a = 5Ghz\n802.11b = 2.4Ghz\n802.11g = 2.4Ghz\n\nUnfortunatelly b & g can get serious interference from microwaves, cordless phones, Bluetooth, and other equipment using the same 2.4 GHz.\n\nIn b & g there are 14 overlaping channels or bands.  the best ones to pick are 1 and 11.  Note that they do overlap, and the channels only represent the "center" of the frequency range.  The channels are 5Mhz appart.\n\nThe most interference you will get in a building is power, microwave and cordless phones.\n\nWiFi has been demonstrated to work 150+ miles without interference on a flat surface.\n\nI included a few links for further education.
526797
To boost the signal of your wireless router I would recommend buying a suitable enhanced antenna from your local computer store. They are designed to work with your router. There are also signal boosting devices that can be used throughout your home/office to help increase your signal coverage and wipe out dead spots.\n\nAs for the Sat dish; if you want to be Dr. Frankenstein and experiment you can go to your local Radio Shack and get the proper adapters to convert the connection from one to the other. Not sure if they will have the proper adapter for the router though. You may have to improvise. Will you succeed? I am very doubtful. Sat dishes are used to RECEIVE SIGNALS, not TRANSMIT! You may get better luck just using the coax cable used with the dish. But then again, stranger things have happened...
967921
Use outdoor antennas.
146817
buy a linksys wireless access point and if you want it for your laptop get a pcmcia card for it, also made by linksys. if its for a desktop there is a card with an antenna sticking out of it that you can install in your system. i have one and it works great. if you want a larger coverage area, you can buy a range expander
713354
The key words here are "up to" 100 feet.  That's with a clear line of sight and no barriers between the NIC and the WAP.  As soon as the signals have to pass through a wall or two, range will drop significantly.
481190
What you'll need will depend upon the distances involved.  Two wireless access points with directional outside antennas (the so-called Pringles can type) can reach up to a mile or more.  Beyond that you'll probably need a parabolic dish.  That setup can reach up to 22 miles (!!) with very careful aiming.  Either of these are limited to line-of-site.\n\nIf you want the best possible connection, go with Cisco Aironet gear.  It's expensive -- $4,000 or so for two Aironets, two parabolic dishes and 50 feet of wave guide at each end -- but well worth the expense.\n\nAnother possibility is the Proxim Tsunami wireless bridge.  A pair will set you back about $3500.00.  Range is limited to about 6 miles but they are dead easy to set up, far easier than the Cisco Aironets.  If you ground the mast properly (read the docs!) they can even take a direct lightning hit.  That's not guaranteed, but I've worked with them and seen it happen.
798384
buy a satellite dish and a linksys router and go online and find the directions, and build it.. it had a range of .5 miles wifi