I use clearwire and my antenna is picking up a TREMENDOUS amount of electromagnetic interference in my home.  I've moved the antenna as far as possible from ALL other electrical appliances and equipment (opposite side of room...15ft from the closest monitor) and it makes no change.  I know that's one issue...the clearwire ppl say there may be an issue on there end as well because of how my trace looked:

Microsoft Windows XP [Version 5.1.2600]
(C) Copyright 1985-2001 Microsoft Corp.

C:\Documents and Settings\Owner>tracert www.yahoo.com

Tracing route to www.yahoo-ht3.akadns.net [209.191.93.52]
over a maximum of 30 hops:

  1     1 ms    <1 ms    <1 ms  192.168.1.1
  2  2148 ms  2187 ms  2621 ms  75-94-224-1.lub.clearwire-dns.net [75.94.224.1]

  3  2253 ms  1867 ms  1985 ms  10.41.215.37
  4  1971 ms  1964 ms  2054 ms  64.13.47.142
  5  2276 ms  2566 ms  2498 ms  64.13.47.137
  6  2136 ms  2144 ms  1949 ms  ge-6-20.car2.Dallas1.Level3.net [4.71.169.5]
  7  1829 ms  1603 ms  1630 ms  ae-11-69.car1.Dallas1.Level3.net [4.68.19.3]
  8  1687 ms  1769 ms  1744 ms  YAHOO-INC.car1.Dallas1.Level3.net [4.79.180.2]
  9  1970 ms  2055 ms  1871 ms  ae1-p120.msr1.mud.yahoo.com [216.115.104.81]
10  2005 ms  2068 ms  1944 ms  te-8-1.bas-c1.mud.yahoo.com [68.142.193.5]
11  1998 ms  1990 ms  1922 ms  f1.www.vip.mud.yahoo.com [209.191.93.52]

Trace complete.

C:\Documents and Settings\Owner>

My issues started when we moved into this house toward the end of May and they say the EMI thing started the DAY I moved our network here.  I'm pretty sure it's the biggest issue.  So I wondering if there's a way to shield an antenna from outside interference?

Really can't shield an antenna from electromagnetic interference.  You want the antenna to receive electromagnetic signals of a certain frequency (the ones you want) and reject all others.  The antenna works with the cable and the radio in the box (I'm assuming they give you a box that you plug into your computer's ethernet port) to receive and amplify the signals you want and reject what you don't want.  I would suggest you check your cables very carefully.  Could have a broken shield or wire somewhere.  If there is interference at the frequency of Clearwire's own network, you can't fix it with your antenna (unless you can use a directional antenna to aim toward the Clearwire transmitter.)  The frequency we are talking about here I believe is 2.5GHz.  Anything in or near the house with that frequency? 

The ping times in the trace route are quite long.     Looks like they have issues there for sure.

yeah I really didn't know how the antenna worked but after some research I learned that shielding it is hopeless.  We may be screwed and have to ditch the contract and go with cable or something.  We also have issues with our Dish Network receiver here...lots of "lost signal" bs which really pissed us off tonight when we missed the last 10 minutes of the secret life of an american teenager.  I think it's linked.

We have nothing in this house that wasn't in the last house.  I went out and looked around and I can see the clearwire tower from my back yard.  I can't see anything other towers or anything.  I' going to ask around my neighborhood and see if anyone else here uses clearwire and see if they have issues. 

Ouch those pings are somewhatbad,id raise hell with the provider, yove done all you can, on your end

how about this one...

Microsoft(R) Windows DOS
(C)Copyright Microsoft Corp 1990-2001.

C:\DOCUME~1\OWNER>tracert www.yahoo.com

Tracing route to www.yahoo-ht3.akadns.net [209.191.93.52]
over a maximum of 30 hops:

  1     1 ms    <1 ms    <1 ms  192.168.1.1
  2  3192 ms  3259 ms  3127 ms  75-94-224-1.lub.clearwire-dns.net [75.94.224.1]

  3  2787 ms  2739 ms  2996 ms  10.41.215.37
  4  3147 ms  3003 ms  3073 ms  64.13.47.142
  5  2862 ms  2781 ms  2719 ms  64.13.47.137
  6  2877 ms  2525 ms  2664 ms  ge-6-20.car2.Dallas1.Level3.net [4.71.169.5]
  7  2689 ms  3044 ms  3016 ms  ae-11-69.car1.Dallas1.Level3.net [4.68.19.3]
  8  2850 ms  2505 ms  2269 ms  YAHOO-INC.car1.Dallas1.Level3.net [4.79.180.2]
  9  2476 ms  2455 ms  2616 ms  ae1-p130.msr2.mud.yahoo.com [216.115.104.85]
10  2793 ms  2815 ms  3116 ms  te-8-1.bas-c1.mud.yahoo.com [68.142.193.5]
11  3029 ms  2747 ms  2539 ms  f1.www.vip.mud.yahoo.com [209.191.93.52]

Trace complete.

C:\DOCUME~1\OWNER>

idiot clearwire shaZam!...

Do you have any way to access the back end of your wirless internet appliance to have a look at the signal strength?  Might have a signal problem, as ping times will go down the tubes with a degredation in the signal to noise ratio.  Either noise goes up, or signal goes down.  Either way equals the same problem.  Just because you can see the tower doesn't mean you can "hear" the tower if you have a faulty component or four.

Any power lines, industry, large electric motors, or FM transmitters close to you?

What is the distance to the tower?

mak if that is your ip, HIDE IT