"JB" wrote in message
...
-
I have need of a directional antenna for a 30 foot path within the house.
(the microwave oven wipes out the signal).

Yikes! I have never seen that. I would be concerned about leakage.
Sometimes I have torn into things and found stupid stuff like paint over
grounding surfaces or rust in the compartment. There is a critical ground
around the probe entrance.


The laptop computer is downstairs about 10 feet from the microwave, and the
wireless router is upstairs about 30 feet away with a desktop(and the path
goes through three walls and the floor. The microwave doesn't wipe out the
laptop, but slows things down a bit. A directional antenna would solve the
problem. I'm not trying to increase range at all.

Bill Kearney wrote:

...
In your case it would also help to define what sort of connection you're
trying to make. Point to point, metropolitan, etc.

-Bill Kearney

His original post began, "Looking for outdoor omni "whip" antenna for
2.4 GHz. "

Now, why can't I make any sense out of your post, in relationship to
his? "Omni" has more than one meaning?

Regards,
JS

"Bill Kearney" wrote in message
t...

"DaveC" wrote in message
obal.net...
Looking for outdoor omni "whip" antenna for 2.4 GHz.

Whip antenna? What is this, for a vehicle? For a stationary location it
seems like it'd be an extremely bad idea to use an antenna that 'whipped'
around.

Is there any reason to not go for the greatest gain antenna, given that
cost
is not too important (within reason)?

Alligator effect. Wide mouth receiving everything. If you don't need to
pickup everything then why bother? It just makes it harder for your WiFi
router to cut through all the noise of distant stations it doesn't
communicate with. Get the right antenna suited for your installation, no
more, no less.

Which leads to the constant request, when you ask a question POST WHAT
GEAR YOU'RE USING.

In your case it would also help to define what sort of connection you're
trying to make. Point to point, metropolitan, etc.

-Bill Kearney
Since you have included the HAM radio newsgroups as your first choices,
with the Internet Wireless as your last choice,
then - as was mentioned above - what are you trying to accomplish
with this 2.4Ghz outdoor antenna ??

Since you used the term "whip" it tends to imply some physical motion or
vehicle,
vs a "vertical" which implies a stationary location.
And both imply a omni pattern - like a general Access Point -

Since you used the term "whip" it tends to imply some physical motion or
vehicle,
vs a "vertical" which implies a stationary location.
And both imply a omni pattern - like a general Access Point -

-=-=-=-

OK, time to clarify...

Wifi (2.4 GHz). outdoor omni vertical (not whip), permanent mount on pole, to
be connected (very short pigtail) to pole-mounted wifi router in client mode.
Max output: 250 mW.

Is it true that the higher the gain the flatter the "donut" shape of the
sensitivity field?

(And yes, my terminology is rudimentary... please forgive.)

Thanks,
--
DaveC

This is an invalid return address
Please reply in the news group

DaveC wrote:
Since you used the term "whip" it tends to imply some physical
motion or vehicle,
vs a "vertical" which implies a stationary location.
And both imply a omni pattern - like a general Access Point -

-=-=-=-

OK, time to clarify...

Wifi (2.4 GHz). outdoor omni vertical (not whip), permanent mount on
pole, to be connected (very short pigtail) to pole-mounted wifi
router in client mode. Max output: 250 mW.

Is it true that the higher the gain the flatter the "donut" shape of
the sensitivity field?

(And yes, my terminology is rudimentary... please forgive.)

Thanks,
--
DaveC

dropped the x-posting to the ham groups -
--

why omni on a pole in "client mode" ?

If you are attemtping to connect to a specific Access Point,
this has been discussed here zillions of times,
and there are other questions, clarifications, and solutions available -
other than an omni -
Where are you in relation to the Access Point, how far, line of sight, etc

This requires a little different "thinking" than just putting up a bigger
stick
to talk to a 2m, 220, or 450 repeater -

DaveC wrote:

Is it true that the higher the gain the flatter the "donut" shape of the
sensitivity field?

(And yes, my terminology is rudimentary... please forgive.)

I'm the one who initially committed than terminological crime so forgive
ME! Where is that big omni gain going to come from if not from the
vertical beamwidth? Start with the isotropic model pictured as a
spherical balloon. Squeeze it however you want to. Nothing about an
antenna can add volume to the model, its just a matter of how you
squeeze it.

-Bill

On Fri, 21 Nov 2008 21:51:16 -0800, DaveC wrote:


Is it true that the higher the gain the flatter the "donut" shape of the
sensitivity field?

That is the only way to get actual gain from a (horizontally)
omnidirectional antenna (excluding any MIMO designs).

Flattening the vertical radiation pastern may have severe drawbacks
especially if the mast is swinging in the wind or some weak (e.g.
indoors) users are close to the base of the mast.

Paul OH3LWR

OK, time to clarify...

You still don't describe what sort of connection you're trying to make.

"Bill Kearney" wrote:
OK, time to clarify...

You still don't describe what sort of connection you're trying to make.


I have this Comet antenna mounted on my roof and it works super!

http://www.wlanparts.com/product/GP-...from_Comet.htm
l

--
-

DaveC wrote:

OK, time to clarify...

Wifi (2.4 GHz). outdoor omni vertical (not whip), permanent mount on pole, to
be connected (very short pigtail) to pole-mounted wifi router in client mode.
Max output: 250 mW.

Is it true that the higher the gain the flatter the "donut" shape of the
sensitivity field?

(And yes, my terminology is rudimentary... please forgive.)

Thanks,

Then this should serve you well:

http://tinyurl.com/5gtjmg

Regards,
JS