why does wifi wires connect to the screen

I have found this not just on Inspiron, but on other machines also. Why is wifi wires connected to the screen ? If you want to remove/ replace the screen, you not only need to disconnect the wires going to the screen, but also wifi that connects in the back.

What is the purpose of connecting wifi wires to the screen ?

Thanks

 

Are they actually connected to the screen or are they connected to the lid.

The top of the lid is the best place for the WiFi antenna's and every notebook I have ever had has them there. They usually run the lines through one of the hinges, behind the screen, screws in at the top with foil tape also sticking to the lid.

The screen itself is just one part of the assembly, buying a screen and buying an assembled lid are usually different stories. As far as why its best, well I have a second wifi card in my machine with the antenna's in the base of the notebook and it gets 3 times worse reception, think about it.

 

I opened a old notebook last week, the entire inside of the lid was covered in foil, the antenna's where directly sodered to the foil.

Why? The screen acts as one big antenna. Bigger = better.

 

The foil is to keep noise from the ccfl backlights that some screens use from interfering with other devices. Bigger does not = better. Higher gain means less directionality and a sheet of foil is hardly a tuned antenna. As i said i have noiced the foil attached to the antennas usually is stuck to this lcd foil.

If both antenna's where truly connected to the foil. Wireless N MIMO would not be able to function at all. B and G devices might not be quite as bothered. I noticed the antenna's in this particular notebook (picture below) are actually soldered together at one lower point. Which is strange.

Here is a compaq lid:

 

Thank you for the replies. Yes, it is connected to the lid and not to the screen. Now, what I am confused by is this. When my wifi stopped working somehow, I bought an external PCMCIA wifi card and that does not have an antenna. It works perfectly fine, I have never noticed any speed difference. What is the antenna for such a device ?

 

It has an antenna inside the card. Usually in the plastic end. Speed difference and signal strength do not always go hand in hand.

One thing to remember. If you have 15 Mbps Cable and your wireless network has one 54Mbps G client connected at say only 24 Mbps. You are still on a faster connection than your internet, you probably wouldn't notice any difference when the connection between the card and router slowed down. As well as your usually not maxing out your internet connection. That said it should also be noted you wont always get the connected speed out of the router.

Also note that the "Bars" in windows are absolutely useless. You can have 5 bars and an actual 28% strength.

 

Ok, thanks for helping me with the answers.