Best antenna to go through triple-pane glass

Hi: Looking for recommendation on the best antenna to go through 3
panes of glass. Here is my configuration:

WISP > one mile LOS > High Gain Antenna > 2 ft pigtail > Netgear
Bridge > 5 ft cat 5 cable > Netgear AP > XP laptop w/SMC universal
wifi card

No option to put outside the building. Antenna must be inside
building. Tried going through wall but worse than going through the
windows.

Thanks

Chuck Daniels <(E-Mail Removed)> wrote:
> Hi: Looking for recommendation on the best antenna to go through 3
> panes of glass. Here is my configuration:

You can use more or less any antenna, just attatch a diamond holesaw
to the front
Is the glass just glass, or "Low e" glass?

Glass should pose no problem. My std. antenna wifi router works trough two
sets of double glazed and leaded windows at an acute angle at 75m LOS in
between. Std. Orinoco USB adapter at the other end.
Regards,
Martin

"Chuck Daniels" <(E-Mail Removed)> wrote in message
news:(E-Mail Removed) om...
> Hi: Looking for recommendation on the best antenna to go through 3
> panes of glass. Here is my configuration:
>
> WISP > one mile LOS > High Gain Antenna > 2 ft pigtail > Netgear
> Bridge > 5 ft cat 5 cable > Netgear AP > XP laptop w/SMC universal
> wifi card
>
> No option to put outside the building. Antenna must be inside
> building. Tried going through wall but worse than going through the
> windows.

Why not open the window, and use double stick tape to attach a flat panel
antenna to the outside, then run the pigtail under the sash?

Ian Stirling <(E-Mail Removed)> wrote in message news:<K8VTb.2314$(E-Mail Removed)>...
> Chuck Daniels <(E-Mail Removed)> wrote:
> > Hi: Looking for recommendation on the best antenna to go through 3
> > panes of glass. Here is my configuration:
>
> You can use more or less any antenna, just attatch a diamond holesaw
> to the front
> Is the glass just glass, or "Low e" glass?

I asked the building owner and he tells me the glass is definitely
Low-e. Does that make a difference?

Chuck Daniels <(E-Mail Removed)> wrote:
> Ian Stirling <(E-Mail Removed)> wrote in message news:<K8VTb.2314$(E-Mail Removed)>...
>> Chuck Daniels <(E-Mail Removed)> wrote:
>> > Hi: Looking for recommendation on the best antenna to go through 3
>> > panes of glass. Here is my configuration:
>>
>> You can use more or less any antenna, just attatch a diamond holesaw
>> to the front
>> Is the glass just glass, or "Low e" glass?
>
> I asked the building owner and he tells me the glass is definitely
> Low-e. Does that make a difference?

The glass has a coating which will probably significantly reduce radio.
Unfortunately, I don't know exactly how much, and I suspect it will vary
significantly between brands.

The easiest way may probably be to measure it by placing a router with an
omni antenna inside, and measuring the range to an outside node.
Then work out the loss (the range decrease is proportional to the
square of the attenuation, if the range reduces by a factor of 10,
then the signal has gone down by a factor of 100)

Chuck Daniels wrote:
> Hi: Looking for recommendation on the best antenna to go through 3
> panes of glass. Here is my configuration:
>
> WISP > one mile LOS > High Gain Antenna > 2 ft pigtail > Netgear
> Bridge > 5 ft cat 5 cable > Netgear AP > XP laptop w/SMC universal
> wifi card
>
> No option to put outside the building. Antenna must be inside
> building. Tried going through wall but worse than going through the
> windows.
>
> Thanks

The same one that's the best without the glass.
mike

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http://www.geocities.com/SiliconValley/Monitor/4710/

So I have been looking on ebay and have found some antennas that are
in my budget (ie. less than $75). There seem to be 5 types
1) yagi
2) flat panel
3) parabolic
4) omni
5) cantenna

The yagi, parabolic and cantenna don't seem like they would fit the
decor of my appartment. So I am focusing on the omni and the flat
panel. For my application (one mile, through triple pane low-e glass)
which one would generally be best?

Jeremy Parr wrote:

> "Chuck Daniels" <(E-Mail Removed)> wrote in message
> news:(E-Mail Removed) om...
>
>>Hi: Looking for recommendation on the best antenna to go through 3
>>panes of glass. Here is my configuration:
>>
>>WISP > one mile LOS > High Gain Antenna > 2 ft pigtail > Netgear
>>Bridge > 5 ft cat 5 cable > Netgear AP > XP laptop w/SMC universal
>>wifi card
>>
>>No option to put outside the building. Antenna must be inside
>>building. Tried going through wall but worse than going through the
>>windows.
>
> Why not open the window, and use double stick tape to attach a flat panel
> antenna to the outside, then run the pigtail under the sash?

See "No option to put outside the building" above. I'm half guessing
OP's in a modern office building in which the windows don't open.

Chuck Daniels <(E-Mail Removed)> wrote:
> So I have been looking on ebay and have found some antennas that are
> in my budget (ie. less than $75). There seem to be 5 types
> 1) yagi
> 2) flat panel
> 3) parabolic
> 4) omni
> 5) cantenna
>
> The yagi, parabolic and cantenna don't seem like they would fit the
> decor of my appartment. So I am focusing on the omni and the flat
> panel. For my application (one mile, through triple pane low-e glass)
> which one would generally be best?

Shape means nothing.
The important figure is the gain.

Decibells add.

The total path loss is what's important.
If you want it to go 1.8Km, rather than .05Km, then that's some 40
times as far.
This means the radio signal will be 1600 times (40 squared) times weaker,
so the antennas need to make thisup.

1600 = around 33db.

So, each antenna needs 17.5db more gain that the standard omni antennas,
which will easily reach 50m, call it 20db each.

If the window drops the signal by another 10db, then each antenna would
need to have a gain of around 25db each, which I think is around a 60-70cm
dish.

If the glass is completely loss free, then a 30cm dish would probably be
adequate.

Can you get immediately outside the window, or is it high up.