RadioBanter

RadioBanter (https://www.radiobanter.com/)
-   Antenna (https://www.radiobanter.com/antenna/)
-   -   WiFi antenna recommendations? (https://www.radiobanter.com/antenna/138747-wifi-antenna-recommendations.html)

DaveC[_2_] November 21st 08 07:38 AM

WiFi antenna recommendations?
 
Looking for outdoor omni "whip" antenna for 2.4 GHz.

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

There are scads of these on the 'net. I'm looking for someone who has
experience with one or more of them and can make a recommendation for one.

Thanks,
--
DaveC

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


John Smith November 21st 08 08:15 AM

WiFi antenna recommendations?
 
DaveC wrote:
Looking for outdoor omni "whip" antenna for 2.4 GHz.

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

There are scads of these on the 'net. I'm looking for someone who has
experience with one or more of them and can make a recommendation for one.

Thanks,


There are 1/2 wave antennas on the market which do a decent job. I have
found their biggest problem is the coax the manufacturer ships with
them--too low of quality and too short.

Here is an article on one you can homebrew yourself, from ANY USB wifi
card:
http://tinyurl.com/6xdfav

-- or --

How about one of these?:

http://tinyurl.com/5ocovb

used with a 25 ft. USB extension cable, I use it when traveling. Plus,
you bypass the need for expensive/lossy SHF coax ...

Regards,
JS

John Smith November 21st 08 08:40 AM

WiFi antenna recommendations?
 
DaveC wrote:
Looking for outdoor omni "whip" antenna for 2.4 GHz.

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

There are scads of these on the 'net. I'm looking for someone who has
experience with one or more of them and can make a recommendation for one.

Thanks,


To be complete, here is an example of a 1/2 external with sma connector
and 9 ft. length of coax. Notice, they DO NOT mention what the
attenuation factor for the coax is ... :-(

http://tinyurl.com/653n5y

Regards,
JS

John Smith November 21st 08 08:53 AM

WiFi antenna recommendations?
 
DaveC wrote:


There are scads of these on the 'net. I'm looking for someone who has
experience with one or more of them and can make a recommendation for one.

Thanks,


And, these are probably what you are looking at on the net?

http://tinyurl.com/5kg4cz

or

http://tinyurl.com/5gtjmg

Regards,
JS

exray[_4_] November 21st 08 11:28 AM

WiFi antenna recommendations?
 
DaveC wrote:
Looking for outdoor omni "whip" antenna for 2.4 GHz.

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

There are scads of these on the 'net. I'm looking for someone who has
experience with one or more of them and can make a recommendation for one.

Thanks,


Hi, not actually 2.4 Gig WiFi but cellular wireless modem card. I
bought one of the small verticals with a magnet mount and cabling for
about $15 ppd as I recall. My situation is that my house is built with
concrete/rebar construction, metal 'persiana' windows and screens and
its hard to get a signal out of here even on the various cellular bands.
I think the highest band there is 1.8 GHz.

I didn't go for gain since the path to the site is only about 1.3 miles
away so I opted for the little guy, about 7 inches tall, that just sits
on the roof. On the other hand, a friend in a different location got
himself into all sorts of problems with reflections and multiple tower
sites and is now looking for a directional antenna to minimize the clutter.

Another consideration is the vertical angle between you and the site.
The "high gain" verticals (I've seen ones claiming 14db) have a rather
flattened omni pattern so that if you have to look upwards to your
intended site you might find the gain to be considerably less, if any.

GL,
Bill
Vieques, PR

Bill Kearney[_2_] November 21st 08 02:00 PM

WiFi antenna recommendations?
 

"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



Dave[_18_] November 21st 08 02:26 PM

WiFi antenna recommendations?
 
Bill Kearney wrote:
"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


Short Pringle's can, 1/4 wave probe, 1/2 wave from closed end, soldered
to female TNC.

John Smith November 21st 08 02:52 PM

WiFi antenna recommendations?
 
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


JB[_3_] November 21st 08 04:46 PM

WiFi antenna recommendations?
 
"John Smith" wrote in message
...
DaveC wrote:
Looking for outdoor omni "whip" antenna for 2.4 GHz.

Is there any reason to not go for the greatest gain antenna, given that

cost
is not too important (within reason)?

There are scads of these on the 'net. I'm looking for someone who has
experience with one or more of them and can make a recommendation for

one.

Thanks,


There are 1/2 wave antennas on the market which do a decent job. I have
found their biggest problem is the coax the manufacturer ships with
them--too low of quality and too short.

Here is an article on one you can homebrew yourself, from ANY USB wifi
card:
http://tinyurl.com/6xdfav

-- or --

How about one of these?:

http://tinyurl.com/5ocovb

used with a 25 ft. USB extension cable, I use it when traveling. Plus,
you bypass the need for expensive/lossy SHF coax ...

Regards,
JS


I concur. I like the Huntgate solution but prefer to use Ethernet for the
run. However, there is a problem with using a high gain omni antenna in an
urban area where there is a lot of channel loading. Your throughput drops
because you are spending a lot of time with collision avoidance. This might
work at night, but not if everyone leaves their wireless up all the time.

WiFi was meant to be short range. When you improve your range, you compound
your interference problem exponentially. If you use a Pringles can you have
a big advantage because it is as if you moved your low gain antenna closer
to the AP but you still have the problem of the connections the AP hears but
you don't hear and can't avoid colliding with. At least you aren't being
bombarded with broadcasts.

Simply put, there are limitations to performance when you put yourself in a
crowded situation.


John Smith November 21st 08 09:55 PM

WiFi antenna recommendations?
 
JB wrote:

...
I concur. I like the Huntgate solution but prefer to use Ethernet for the
run. However, there is a problem with using a high gain omni antenna in an
urban area where there is a lot of channel loading. Your throughput drops
because you are spending a lot of time with collision avoidance. This might
work at night, but not if everyone leaves their wireless up all the time.

WiFi was meant to be short range. When you improve your range, you compound
your interference problem exponentially. If you use a Pringles can you have
a big advantage because it is as if you moved your low gain antenna closer
to the AP but you still have the problem of the connections the AP hears but
you don't hear and can't avoid colliding with. At least you aren't being
bombarded with broadcasts.

Simply put, there are limitations to performance when you put yourself in a
crowded situation.


Taking in your text, "overall", I fail to find anything I would nit-pick
at ...

But, you know, as well as I, we are going to attempt to expand range to
and even beyond "its' limits", like a mountain--just because it is
there. :-)

I mean, "That is what we do!" grin

Regards,
JS

JB[_3_] November 21st 08 10:35 PM

WiFi antenna recommendations?
 
"John Smith" wrote in message
...
JB wrote:

...
I concur. I like the Huntgate solution but prefer to use Ethernet for

the
run. However, there is a problem with using a high gain omni antenna in

an
urban area where there is a lot of channel loading. Your throughput

drops
because you are spending a lot of time with collision avoidance. This

might
work at night, but not if everyone leaves their wireless up all the

time.

WiFi was meant to be short range. When you improve your range, you

compound
your interference problem exponentially. If you use a Pringles can you

have
a big advantage because it is as if you moved your low gain antenna

closer
to the AP but you still have the problem of the connections the AP hears

but
you don't hear and can't avoid colliding with. At least you aren't

being
bombarded with broadcasts.

Simply put, there are limitations to performance when you put yourself

in a
crowded situation.


Taking in your text, "overall", I fail to find anything I would nit-pick
at ...

But, you know, as well as I, we are going to attempt to expand range to
and even beyond "its' limits", like a mountain--just because it is
there. :-)

I mean, "That is what we do!" grin

Regards,
JS


Any excuse to raise the noise floor--


John Smith November 21st 08 10:43 PM

WiFi antenna recommendations?
 
JB wrote:


Any excuse to raise the noise floor--


Hmmm, I thought you "bright enough", guess I was wrong ... :-(

Your newsreader has no filters? You are not "bright enough" to use them?

You are not "bright enough" to have figured this out?

You are not "bright enough" to get by without someone telling you?

Etc.?

Filter me, IDIOT!

Regards,
(but STOP your incessant bitching, trust me, the wife is enough ... if I
need more, I'll ask you ... trust me, I won't go wanting ... ROFLOL!)
JS :-)

John Smith November 21st 08 10:50 PM

WiFi antenna recommendations?
 
JB wrote:

...
Any excuse to raise the noise floor--


Whoa ... I apologize to the wife ... she just read the previous post, I
made, to this one ...

She pointed out that you are MUCH WORSE than her--she asked me if you
were gay or had "problems", she did NOT laugh ...

I will not repeat that mistake (next time I won't show her ...
HEHEHEEEEEEEEEEEEEEEEEEEEEEEEEE!)

Regards,
JS

John Smith November 21st 08 11:40 PM

WiFi antenna recommendations?
 
JB wrote:

...
Simply put, there are limitations to performance when you put yourself in a
crowded situation.


You know, JB? Ever since you have entered here, I found you to be an
idiot? I mean, I don't want to be rude, or anything ... now, you have
fertile ground to prove me wrong! I will pause for the words of wisdom
which change my life ...

But then, what are you? Do you have a book you quote from? Do you have
any antennas you are experimenting with? Are they ancient ones, ones we
have seen a dozen times before now? Are you one who wishes to "buddy up
with one(s)" already quoting one (or more) of the "great minds of
yesterday?" Are you here to quote from books for the poor?; i.e., those
who can't afford the books so you "throw quotes out, and bits-of-wisdom
for ignorant and starving minds?" Are you here to "enlighten my mind?"
Are you here to enlighten us all?

What are you about? Whatever it is, please get on with your "big bad
self." My patience grows thin and I am beginning to think you have
NOTHING to offer other than I have already seen? (and seen, many, many
times yawn)

But then, a pause, let us be "be-dazzled!" ... your forum awaits you ...
I now hang upon your every word! :-) Go forth and cure my ignorance!

Regards,
JS

ps56k November 22nd 08 12:22 AM

WiFi antenna recommendations?
 

"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 -




highlandham November 22nd 08 01:22 AM

WiFi antenna recommendations?
 
Dave wrote:
Short Pringle's can, 1/4 wave probe, 1/2 wave from closed end, soldered
to female TNC.

===================================
Yes these cans work well ; the problem is the type and length of coax .
A suitable arangement is a WiFi router near the antenna (if necessary in
a wx proof box ) with an ethernet cat5 cable running to the equipment.

Another possibility is a USB WiFi adaptor in the focal point of a
satellite dish with a USB to ethernet converter.

Frank KN6WH

JIMMIE[_2_] November 22nd 08 01:47 AM

WiFi antenna recommendations?
 
On Nov 21, 2:38*am, DaveC wrote:
Looking for outdoor omni "whip" antenna for 2.4 GHz.

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

There are scads of these on the 'net. I'm looking for someone who has
experience with one or more of them and can make a recommendation for one..

Thanks,
--
DaveC

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


I recently built a Franklin antenna for 2.4Ghz.
I highly reccommend it. Google WiFi and franklin antenna.

Jimmie

DaveC[_2_] November 22nd 08 05:51 AM

WiFi antenna recommendations?
 
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


ps56k November 22nd 08 06:13 AM

WiFi antenna recommendations?
 
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 -




exray[_4_] November 22nd 08 06:24 AM

WiFi antenna recommendations?
 
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

Paul Keinanen November 22nd 08 07:15 AM

WiFi antenna recommendations?
 
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


JB[_3_] November 22nd 08 04:22 PM

WiFi antenna recommendations?
 

Any excuse to raise the noise floor--

I didn't mean for you to take that as a suggestion. You don't have to do
what I tell you to do. That's what we have the news media for.


Bill Kearney[_2_] November 22nd 08 04:47 PM

WiFi antenna recommendations?
 

OK, time to clarify...


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


highlandham[_2_] November 22nd 08 07:42 PM

WiFi antenna recommendations?
 
I have need of a directional antenna for a 30 foot path within the house.
(the microwave oven wipes out the signal).

Do you have any better details on construction?

================================================== ====
If your WiFi device is near the microwave oven , you indeed have a problem.
In my situation the oven is away (approx 7 - 8 metres) from the Wifi
system ,both router and laptop ,and I no longer had interference when
setting the WiFI System to the highest frequency (channel) with the
microwave oven freq at about 2390MHz.

Frank KN6WH


JIMMIE November 22nd 08 08:08 PM

WiFi antenna recommendations?
 
On Nov 21, 8:47*pm, JIMMIE wrote:
On Nov 21, 2:38*am, DaveC wrote:

Looking for outdoor omni "whip" antenna for 2.4 GHz.


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


There are scads of these on the 'net. I'm looking for someone who has
experience with one or more of them and can make a recommendation for one.


Thanks,
--
DaveC

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


I recently built a Franklin antenna for 2.4Ghz.
I highly reccommend it. Google WiFi and franklin antenna.

Jimmie


Also look up AMOS antenna. They are easy to make and work well


Jimmie

John Smith November 22nd 08 08:44 PM

WiFi antenna recommendations?
 
JB wrote:
Any excuse to raise the noise floor--

I didn't mean for you to take that as a suggestion. You don't have to do
what I tell you to do. That's what we have the news media for.


You actually think I might ... damn, I'll work on my image! :-)

Regards,
JS

John Smith November 22nd 08 08:47 PM

WiFi antenna recommendations?
 
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

John Smith November 22nd 08 08:50 PM

WiFi antenna recommendations?
 
JIMMIE wrote:


Also look up AMOS antenna. They are easy to make and work well


Jimmie


Jimmie:

Excellent link, thanks; I will homebrew this when I get the time ...

However, with the reflector plate, it is not OMNI; but, for me this
would NOT be a problem ...

Good work,
regards,
JS

Wayne November 23rd 08 02:18 AM

WiFi antenna recommendations?
 

"Dave" wrote in message
...
Bill Kearney wrote:
"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

Short Pringle's can, 1/4 wave probe, 1/2 wave from closed end, soldered to
female TNC.

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

Do you have any better details on construction?



Knight November 23rd 08 02:05 PM

WiFi antenna recommendations?
 
Guys! I've been selling these Biquads for a long time now and
everyone absolutely
loves them.
Check em out here... http://www.biquadantenna.com
Sold 30 just this month alone, and get emails all the time from
clients
on how good their performance is.
If it doesn't work, you get your money back! (minus shipping of
course)

Thanks for looking!
Pete




On Nov 22, 2:42*pm, highlandham wrote:
I have need of a directional antenna for a 30 foot path within the house.
(the microwave oven wipes out the signal).


Do you have any better details on construction?


================================================== ====
If *your WiFi device is near the microwave oven , you indeed have a problem.
In my situation the oven is away (approx 7 - 8 *metres) from the Wifi
system ,both router and laptop ,and I no longer had interference when
setting the WiFI System to the highest frequency (channel) with the
microwave oven freq at about 2390MHz.

Frank * KN6WH



JB[_3_] November 23rd 08 02:55 PM

WiFi antenna recommendations?
 
-
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.

My microwave oven is in the far corner of the house and I run 100 watts on
VHF and 600 on HF at times and never had trouble. I never tried the laptop
in the kitchen for fear of spillage. The Linksys is essentially on the
floor to keep people in the park next door from ripping up my bandwidth.
(although sometimes I would prefer geeks hanging out there to chase the rest
out) No coverage problems at all. I do have an HT that gets "some"
interference when I set it on top of the oven.


John Smith November 23rd 08 04:46 PM

WiFi antenna recommendations?
 
Knight wrote:
Guys! I've been selling these Biquads for a long time now and
everyone absolutely
loves them.
Check em out here... http://www.biquadantenna.com
Sold 30 just this month alone, and get emails all the time from
clients
on how good their performance is.
If it doesn't work, you get your money back! (minus shipping of
course)

Thanks for looking!
Pete


Which picture depicts the omnidirectional one?

Regards,
JS

Jeff Liebermann[_2_] November 23rd 08 11:32 PM

WiFi antenna recommendations?
 
On Sat, 22 Nov 2008 12:08:54 -0800 (PST), JIMMIE
wrote:

On Nov 21, 8:47*pm, JIMMIE wrote:
I recently built a Franklin antenna for 2.4Ghz.
I highly reccommend it. Google WiFi and franklin antenna.
Jimmie


Also look up AMOS antenna. They are easy to make and work well
Jimmie


AMOS, Franklin, Sector, et al:
http://pe2er.nl/wifisector/
http://yu1aw.ba-karlsruhe.de/vhf_ant.htm
http://www.qsl.net/yu1aw/vhf_ant.htm
http://www.brest-wireless.net/gallery/AntenneAmos
http://www.brest-wireless.net/wiki/materiel:amos
http://www.brest-wireless.net/forum/viewtopic.php?id=75&p=2

NEC2 model:
http://802.11junk.com/jeffl/antennas/AMOS-7/
http://802.11junk.com/jeffl/antennas/AMOS-5/ (not optimized yet)

AMOS design:
http://www.qsl.net/yu1aw/amos_article.pdf

Inverted AMOS:
http://www.qsl.net/yu1aw/invertamos.pdf


--
Jeff Liebermann
150 Felker St #D
http://www.LearnByDestroying.com
Santa Cruz CA 95060 http://802.11junk.com
Skype: JeffLiebermann AE6KS 831-336-2558

Wayne November 24th 08 12:06 AM

WiFi antenna recommendations?
 

"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.



Jeff Liebermann[_2_] November 24th 08 12:39 AM

WiFi antenna recommendations?
 
On Sun, 23 Nov 2008 15:32:02 -0800, Jeff Liebermann
wrote:

NEC2 model:
http://802.11junk.com/jeffl/antennas/AMOS-7/
http://802.11junk.com/jeffl/antennas/AMOS-5/ (not optimized yet)


Fixed. I was feeling guilty so I ran it through the optimizer in
4NEC2. I haven't built a 5 dipole AMOS yet using these dimensions.

--
Jeff Liebermann
150 Felker St #D
http://www.LearnByDestroying.com
Santa Cruz CA 95060 http://802.11junk.com
Skype: JeffLiebermann AE6KS 831-336-2558

JIMMIE November 24th 08 03:26 AM

WiFi antenna recommendations?
 
On Nov 23, 7:39*pm, Jeff Liebermann wrote:
On Sun, 23 Nov 2008 15:32:02 -0800, Jeff Liebermann
wrote:

NEC2 model:
http://802.11junk.com/jeffl/antennas/AMOS-7/
http://802.11junk.com/jeffl/antennas/AMOS-5/ *(not optimized yet)


Fixed. *I was feeling guilty so I ran it through the optimizer in
4NEC2. *I haven't built a 5 dipole AMOS yet using these dimensions.

--
Jeff Liebermann * *
150 Felker St #D * *http://www.LearnByDestroying.com
Santa Cruz CA 95060http://802.11junk.com
Skype: JeffLiebermann * * AE6KS * *831-336-2558


I put one up I use with a WiFi repeater and I can see dozens of
wirless routers in my neighborhood. The antena i mounted at about
20ft on my chimney. There are about 8 or 9 with no security. If I so
chose I would never have to pay for internet service. There is another
subdivsion behind my house I havent even looked at that one yet.
Strange thing I know 3 of the people who have the open systems and
they are farly savy about these things. I wonder if they are leaving
them open on purpose.

Jimmie

John Smith November 24th 08 06:26 AM

WiFi antenna recommendations?
 
Wayne wrote:

...

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.



I had a cheap samsung (I think that was it) microwave, it did slow
internet ...

I now have a 1.2 KW GE ... it does not ...

However, a leakage meter did show leakage from the samsung, and barely
reads on GE I have now, and I mean I touch the microwaves case to get
that reading!

So, what is the point? Buyer beware, with lack of consumer protection,
I would check the microwave myself rather than trust others to safeguard
me ...

Regards
JS

John Smith November 24th 08 06:35 AM

WiFi antenna recommendations?
 
JIMMIE wrote:

...

Strange thing I know 3 of the people who have the open systems and
they are farly savy about these things. I wonder if they are leaving
them open on purpose.

Jimmie


I do. "They" call it a "honepot" (google it), fun to mess with 'em ... :-)

Regards,
JS

JB[_3_] November 24th 08 04:08 PM

WiFi antenna recommendations?
 

"Wayne" wrote in message
...

"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.

It would certainly be best to remove the interference. If you have 4 bars
now, 5 bars might not do away with the problem. Moving the microwave just
5' more might be enough. You may have to bite the bullet and put in some
wiring to move the router.

Some of these guys are prone to take a practical problem like yours and turn
it into a full-blown engineering problem or a swap meet for their break
through technology or even an opportunity to throw mud. One engineering
problem we faced was how to contain UHF security and housekeeping repeaters
to a high rise building and it's underground structure. The final result
was 99% coverage in the building and the parking structure, but when
security went off the property, the radios went away. Visits to other
buildings showed no coverage there either. We had to do that for both
security and so we could get co-ordinated for licensing in an urban area.
But it was a multi-million dollar system. This is free.

Placing one of those in an upstairs room is an invitation to the neighbors.
I run a combination of wired and wireless. Wired to the desktop and to a
port replicator for the laptop and wireless to a print server with several
printers in a shop area, and the AP is off unless I want to roam around or
do print jobs. There are times I have printed from the laptop, wireless in
the shop to baby-sit print jobs, but it keeps the office clear and quiet.
One of these days I will have to run a cat5 out to the shop. It is simply
faster and more secure. The end result is my router, 1 foot off the floor
with the power set to 50% to do all I need to do.



JB[_3_] November 24th 08 04:39 PM

WiFi antenna recommendations?
 
"John Smith" wrote in message
...
JIMMIE wrote:

...

Strange thing I know 3 of the people who have the open systems and
they are farly savy about these things. I wonder if they are leaving
them open on purpose.

Jimmie


I do. "They" call it a "honepot" (google it), fun to mess with 'em ...

:-)

Regards,
JS


Perhaps they want to take the blame for everyone downloading bootleg porn,
music and movies until their ISP terminates or throttles them for abuse.
Either that or they are trying to log mac addresses of those who do.



All times are GMT +1. The time now is 05:38 PM.

Powered by vBulletin® Copyright ©2000 - 2025, Jelsoft Enterprises Ltd.
RadioBanter.com