cantenna_directional_antenna_with_gain
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cantenna_directional_antenna_with_gain [2007/02/24 18:41] – spanish | cantenna_directional_antenna_with_gain [2010/11/21 15:51] (current) – typos sleek | ||
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- | ====== | + | ====== Cantenna, directional antenna with gain ====== |
Doc Revision: V1.0 \\ | Doc Revision: V1.0 \\ | ||
- | Fecha: 28 Enero 2007 \\ | + | Date: 28 Jan 2007 \\ |
By: RF Peep \\ | By: RF Peep \\ | ||
- | ===== Introducción | + | ===== Introduction |
- | Mucha gente pregunta como **mejorar** su señal | + | Many people have been asking how to **boost** their wifi signal, here is my small contribution with an antenna I made and use successfully. |
- | El objetivo de este tutorial | + | The objective of this tutorial |
- | ===== Explicación | + | ===== Explanation |
- | Esta antena es direccional y muy simple | + | This antenna is directional and very simple |
- | Mi tarjeta | + | My USB stick is a D-Link G122 ver B1. |
- | Esta lata contenia comida para perro, cualquier lata de un tamaño aproximado funcionará bien. Estas son las medidas: | + | It’s a can which contained dog food, any can of the same size will work. This one measure: |
- | Largo = 170mm, | + | Length |
- | Ancho = 100mm, | + | Width = 100mm, |
- | Distancia desde el borde inferior de la lata al agujero | + | Length from inside bottom of can to centre of USB stick = 40mm |
- | Haz un agujero del tamaño de tu stick USB como se muestra en la primera foto. | + | Cut a rectangular hole as shown in the photo Pic 1. Then smooth the entrance of the can so the edges are not sharp, I used the rounded end of a hammer. |
- | Pon el stick USB en su lugar y aseguralo con "blu tack", " | + | Put the USB stick inside the can and secure it with blu tack or silicon sealant. You will need to adjust the USB stick by moving it in and out for optimum received signal by pointing the can at your AP and using [[airodump-ng]] |
- | Es necesario que el AP esté a una distancia considerable | + | The AP needs to be a reasonable distance away (not in the same room) so that you don’t swamp the receiver and get a false reading on your software. |
- | Por el lado abierto de la lata es por donde entran las ondas de radio. Es bastante direccional y unos pocos grados | + | The open end of the can is where the wave enters, point his towards the AP! |
+ | It is highly directional and a few degrees left or right of the target will make a significant difference. | ||
- | La ganancia conseguida está alrededor de 12dB lo que equivale a 20 veces la fuerza del stick USB sin la lata. Este sistema es espectacular por su simplicidad y por lo barato del sistema. | + | The measured gain is around 13dB which is 20 times the strength of the USB stick without the can. This is amazing gain for the simplicity and “cheapness” of the system! |
- | También es interesante saber que si usamos un prolongador | + | This is what I measured using professional measuring equipment from work, I’m astonished at the results myself! |
+ | Due to the internal construction of other USB wifi devices the gain may vary. | ||
+ | Also by inserting the USB device the other way around could improve signal strength, it is all very device dependent. I then use a short length of USB cable to connect the PC to the Cantenna. | ||
- | El tamaño de la late es muy importante para diseñar una antena adecuada, aunque las medidas de esta lata no son los mejores para la frecuencia | + | The size of the can is important when designing a proper antenna system, however, the parameters of this can are in fact not the correct ones for the frequency of wifi but as you will see, work very well and are a compromise. |
- | http:// | + | |
- | Una vez construida, la lata debe colocarse en un trípode o de alguna manera que apunte hacia nuestro | + | Once constructed, the can should be placed on a tri pod or some form of support facing the AP. I used 3mm copper wire, which is easy to work with, to make a simple stand for the Cantenna. |
- | Por favor pregunta cualquier duda o comentario en el foro acerca de la construcción de esta antena y su uso. | + | Please feel free to ask questions or leave feedback on the forum about your construction and use. |
- | PD: Una página con muchos inventos parecidos a este es: | + | ===== Pictures |
- | http:// | + | |
- | + | ||
- | ===== Imágenes | + | |
==== picture 1 ==== | ==== picture 1 ==== | ||
{{http:// | {{http:// |
cantenna_directional_antenna_with_gain.txt · Last modified: 2010/11/21 15:51 by sleek