#1  
Old March 9th, 2010, 06:53 AM
gravityz gravityz is offline
Junior Member
NETGEAR User
 
Join Date: Mar 2010
Posts: 101
gravityz is on a distinguished road
Default wndr3700 antennas shielded!!!!

i found a site which shows a wndr3700 dissasembled.

http://www.ifixit.com/Teardown/Netge...eardown/1680/1


it shows that the 8 internal antennas are covered with a metal shield.

how are the radio signals transmitted when the antennas are covered by a metal shield.

only the bottom is not covered but this would mean that the antennas radiate to the bottom(which is normally mounted to a surface.

can anybody enlighten me?

i know how microwaves work but i do not see an area which works as a tube to receive the waves

thanks
Reply With Quote
  #2  
Old March 9th, 2010, 09:42 AM
Mars Mug's Avatar
Mars Mug Mars Mug is offline
Moderator
NETGEAR Fanatic
 
Join Date: Nov 2006
Location: Stevenage UK
Posts: 12,553
Mars Mug is on a distinguished road
Default Re: wndr3700 antennas shielded!!!!

The antennae are outside the shielded can to the left in the pictures, you can see the PCB antennae tracks labelled ‘ANT_A1 to ANT_A8’, you can clearly see ANT_A7 and ANT_A8 at the bottom. Those eight odd looking devices inside the screened area look very much like ferrites to me. There also appear to be four antennae pigtail connectors on the board.
__________________
I don't work for Netgear.

My name is Andy.
Reply With Quote
  #3  
Old March 9th, 2010, 09:56 AM
gravityz gravityz is offline
Junior Member
NETGEAR User
 
Join Date: Mar 2010
Posts: 101
gravityz is on a distinguished road
Default Re: wndr3700 antennas shielded!!!!

ok my mistake

i saw 8 pieces so i assumed those were antennas.

i see them now.

what are those 4 round pieces of shiny metal?

they look a little round and are near the antennas
Reply With Quote
  #4  
Old March 9th, 2010, 10:41 AM
jmizoguchi's Avatar
jmizoguchi jmizoguchi is offline
Junior Member
 
Join Date: Feb 2007
Location: Kentucky, USA
Posts: 0
jmizoguchi is an unknown quantity at this point
Default Re: wndr3700 antennas shielded!!!!

Quote:
Originally Posted by gravityz View Post
ok my mistake

i saw 8 pieces so i assumed those were antennas.

i see them now.

what are those 4 round pieces of shiny metal?

they look a little round and are near the antennas
that is the antenna

clip touches the metal shielding
Reply With Quote
  #5  
Old March 9th, 2010, 12:34 PM
Mars Mug's Avatar
Mars Mug Mars Mug is offline
Moderator
NETGEAR Fanatic
 
Join Date: Nov 2006
Location: Stevenage UK
Posts: 12,553
Mars Mug is on a distinguished road
Default Re: wndr3700 antennas shielded!!!!

Quote:
Originally Posted by gravityz View Post
what are those 4 round pieces of shiny metal?

they look a little round and are near the antennas
Those are the pigtail connectors I mentioned, you can plug in the pigtail from an antenna there, I assume Netgear put them in for development or test maybe?
__________________
I don't work for Netgear.

My name is Andy.
Reply With Quote
  #6  
Old March 9th, 2010, 12:58 PM
jmizoguchi's Avatar
jmizoguchi jmizoguchi is offline
Junior Member
 
Join Date: Feb 2007
Location: Kentucky, USA
Posts: 0
jmizoguchi is an unknown quantity at this point
Default Re: wndr3700 antennas shielded!!!!

if it was design to install antenna, it should use U.FL Connector on the board.

probably netgear has pre configure board that connects to all the tab and read some db signal or something...
Reply With Quote
  #7  
Old March 9th, 2010, 01:16 PM
htismaqe's Avatar
htismaqe htismaqe is offline
Senior Member
NETGEAR Addict
 
Join Date: Feb 2010
Posts: 2,144
htismaqe is on a distinguished road
Default Re: wndr3700 antennas shielded!!!!

Definitely read this article - very informative.

http://www.smallnetbuilder.com/content/view/30274/100/
Reply With Quote
  #8  
Old March 9th, 2010, 01:25 PM
Mars Mug's Avatar
Mars Mug Mars Mug is offline
Moderator
NETGEAR Fanatic
 
Join Date: Nov 2006
Location: Stevenage UK
Posts: 12,553
Mars Mug is on a distinguished road
Default Re: wndr3700 antennas shielded!!!!

Yes, you can get an idea from that of the complexities of antenna design, and the even greater complexities of MiMo. This most likely explains why its no longer practical for manufacturers to design access points and routers where the user can add external antenna because of the way an external antenna would distort the radiation field. I know some MiMo devices do allow for external antenna, but I doubt it works very well in practice.
__________________
I don't work for Netgear.

My name is Andy.
Reply With Quote
  #9  
Old March 9th, 2010, 01:26 PM
jmizoguchi's Avatar
jmizoguchi jmizoguchi is offline
Junior Member
 
Join Date: Feb 2007
Location: Kentucky, USA
Posts: 0
jmizoguchi is an unknown quantity at this point
Default Re: wndr3700 antennas shielded!!!!

Quote:
Originally Posted by htismaqe View Post
Definitely read this article - very informative.

http://www.smallnetbuilder.com/content/view/30274/100/
that is quite impressive article..
Reply With Quote
  #10  
Old March 9th, 2010, 03:33 PM
htismaqe's Avatar
htismaqe htismaqe is offline
Senior Member
NETGEAR Addict
 
Join Date: Feb 2010
Posts: 2,144
htismaqe is on a distinguished road
Default Re: wndr3700 antennas shielded!!!!

Quote:
Originally Posted by jmizoguchi View Post
that is quite impressive article..
Smallnetbuilder dramatically improved my wireless experience and ultimately converted me on Netgear.

When my Zyxel first died, I bought a Netgear 614.

While playing around one night, I opened Live Messenger on one computer and tried to do remote assistance to another computer on my LAN, which "hairpins" a connection through the router out to the Microsoft servers. The 614 immediately crashed. Netgear support was not helpful and for whatever reason, a Google search of the issue never led me here, so I took it back.

I bought a Linksys 160N and had more problems than I care to count. I discovered Smallnetbuilder while trying to troubleshoot range issues (side note: if you think the Netgear antennas are weird, you should see the PAPERCLIPS Cisco now uses!). Ultimately, I read his review of the 3700 and bought one.

Couldn't be happier.
Reply With Quote
Reply

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off



All times are GMT -8. The time now is 03:02 PM.