Dbi is for wireless range?

[Nick Charitos]

Dbi is for wireless range?
If yes how many Dbi is 20 metres because i need to buy a new router

 

[bill001g]

If it was so easy.

Dbi is a measurement of the power. In theory increasing the power should increase the range but it seldom works that way.

The general rule of thumb for DB is every 3db increase doubles the power so going from say 5 to 8 would be 2 times but going from 5-11 would be 4 times the power. Problem is that signal loss over distance also follows this a similar rule so the rate you lose increases with distance.

So many other things come into play when it comes to antenna that people make their whole career in antenna design.

Pretty much get the largest antenna you can reasonable put on the equipment. The antenna also tend to get huge very fast a 12db omni antenna is close to 4ft in length. You also to a point need to worry about exceeding the legal transmission power but indoors you likely can do what you want.

 

[Nick Charitos]

If it was so easy.

Dbi is a measurement of the power. In theory increasing the power should increase the range but it seldom works that way.

The general rule of thumb for DB is every 3db increase doubles the power so going from say 5 to 8 would be 2 times but going from 5-11 would be 4 times the power. Problem is that signal loss over distance also follows this a similar rule so the rate you lose increases with distance.

So many other things come into play when it comes to antenna that people make their whole career in antenna design.

Pretty much get the largest antenna you can reasonable put on the equipment. The antenna also tend to get huge very fast a 12db omni antenna is close to 4ft in length. You also to a point need to worry about exceeding the legal transmission power but indoors you likely can do what you want.

I need a router to connect my pc at 20metres with 2-3 walls what i should buy

 

[bill001g]

Almost any router SHOULD go that distance. Problem is there is no way to predict how much signal will get though walls since there is so much variation.

You best bet is to buy any brand name and it will transmit at the maximum legal power and if you get one that you can replace the antenna it may be a option. Generally directional antenna are the best solution to distance issues.

 

[USAFRet]

^ ^ This.

Many, many questions would present in looking at WiFi range, especially indoors.

2-3 walls? Stone, brick, drywall, insulation? What rooms are inbetween? A kitchen, maybe? What other equipment is in between? A TV, perhaps?
Other WiFi close by (neighbors)?

I'm not looking for actual answers to those questions, but just listing a very few of the variables that can come into play with WiFi.

Buy a name brand one and see what happens.

 

[Nick Charitos]

^ ^ This.

Many, many questions would present in looking at WiFi range, especially indoors.

2-3 walls? Stone, brick, drywall, insulation? What rooms are inbetween? A kitchen, maybe? What other equipment is in between? A TV, perhaps?
Other WiFi close by (neighbors)?

I'm not looking for actual answers to those questions, but just listing a very few of the variables that can come into play with WiFi.

Buy a name brand one and see what happens.

i already have a tw263r4-a2 baudtec but it sucks at 15m with 2-3 walls of brick