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« on: September 12, 2013, 09:40:49 AM »
mbt1370
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Sensitivity/Gain: 11dBi

You must need SMA connector to connect this antenna to your transmitter.
You can buy it from local Electronic shop.

Asking price is - 1000 + shipping.

we have 2 Same antenna..

1000 Is for each Antenna.
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« Reply #1 on: September 12, 2013, 09:53:33 AM »
anwar
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« Reply #2 on: September 12, 2013, 09:55:24 AM »
arun.sreelakam
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Fly High
True.. pictures and more information pls
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« Reply #3 on: September 12, 2013, 10:02:57 AM »
paladugu_sujith
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always UP in THE air.!!
11 dbi ..pheww... for video tx or rc tx??   either way.. it isnt possible instead range will come down using stock tx power.. i need to add a watt booster ~ 1 watt to use full 11 dbi of power emmission.. with 11 dbi and 1 watt power i got about 16 km range on video tx 2.4 ghz.
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« Reply #4 on: September 12, 2013, 10:07:33 AM »
mbt1370
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I will add Images...ASAP..

That you can use for RC TX ...I think you can not use for VIDEO TX bcoz its length is Longer.
« Last Edit: September 12, 2013, 10:20:51 AM by mbt1370 » Logged
 

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« Reply #5 on: September 12, 2013, 10:12:58 AM »
sundaram
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@Sujith If you get 16 Km for a video tx bandwidth. Same setup for RC control bandwidth you will get more than thrice the range.

But with an Omni directional is really doubtful. If it was a Patch antenna then it is a different story.

Wifi patches are not compatible for Video Tx because of male / female SMA (SMA and RP SMA) connectors. need to change the SMA connectors.

Please do post a photo with close up of the SMA connectors.
« Last Edit: September 12, 2013, 10:27:06 AM by sundaram » Logged
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« Reply #6 on: September 12, 2013, 10:18:32 AM »
mbt1370
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Here is some Images...
http://s16.postimg.org/gozsosnph/IMAG1042.jpg
Antenna for 2.4Ghz 11dBi Omnidirectional - Extend the range


http://s16.postimg.org/8i37jh891/IMAG1043.jpg
Antenna for 2.4Ghz 11dBi Omnidirectional - Extend the range


I hope this will be helpful.
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« Reply #7 on: September 12, 2013, 10:27:35 AM »
sundaram
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OK for video TX only. Thanks.
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« Reply #8 on: September 12, 2013, 10:29:25 AM »
mbt1370
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means...Huh? Undecided
You can use this also for RC TX but you need to SMA connector...to connect with your RC TX.

if anyone Need to buy then PM me..or email - jigs15784@gmail.com
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« Reply #9 on: September 12, 2013, 10:32:51 AM »
sundaram
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Yes you need an SMA convertor adapter for use with RC TX. All wifi antenna are compatible with RC TX.
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« Reply #10 on: September 12, 2013, 10:44:19 AM »
mbt1370
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That's Correct....This is 2.4 Ghz...so we can use any RC 2.4 GHZ Tx With SMA Connector...

Where to buy SMA Connector - You Can Easily buy it from your local Electronic shop...
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« Reply #11 on: September 12, 2013, 11:04:34 AM »
sundaram
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I am just pointing out the obvious to the sundry.

Not just any connector. You need a SMA convertor to use with RC Tx. which is not available in just any electronic shop but available here though

http://www.ebay.in/itm/SMA-female-To-RP-SMA-male-Straight-connector-Adapter-/300918062071?pt=IN_Computer_Components&hash=item46101d3bf7&_uhb=1#ht_2308wt_1111

That is not my listing though.  Wink
SMA Convertor2.jpg
Re: Antenna for 2.4Ghz 11dBi Omnidirectional - Extend the range
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« Reply #12 on: September 12, 2013, 11:11:35 AM »
mbt1370
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that you can ask on the electronic shop...and i think they have connector..

I think this is Female to male Connector.. Thumbs Up
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« Reply #13 on: September 12, 2013, 11:17:46 AM »
sundaram
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SMA-female-To-RP-SMA-male-Straight-connector-Adapter

Thumbs Up All the best
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« Reply #14 on: September 12, 2013, 11:19:24 AM »
paladugu_sujith
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always UP in THE air.!!
@sundaram 11 dbi.. patch antenna . seller never mentioned antenna type.
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« Reply #15 on: September 12, 2013, 11:30:51 AM »
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Are they wifi antenna?
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« Reply #16 on: September 12, 2013, 11:39:11 AM »
sundaram
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 @Sujith Grin Omnidirectional is well understood as not a patch and only a rubber ducky.

@anandp the antenna on sale is not a wifi antenna.

This antenna is OK for video tx

If you are planning to use it for a RC Tx its prudent to buy a wifi antenna straight.

20 dbi available for Rs 1200/-.

http://www.ebay.in/itm/20dBi-2-4GHz-Wireless-WIFI-Antenna-/200962519525?pt=LH_DefaultDomain_203&hash=item2eca4cb1e5&_uhb=1#ht_795wt_1344

But like what Sujith has pointed out use it with wifi amplifier for best performance and for long range flying only and not for short range LOS regular flying. You will loose link when model in the direction of tip of antenna (Like when flying right overhead when antenna is vertical)
$(KGrHqVHJBsFIEvvpF48BSDfrjPDrQ~~60_3.jpg
Re: Antenna for 2.4Ghz 11dBi Omnidirectional - Extend the range
* $(KGrHqVHJBsFIEvvpF48BSDfrjPDrQ~~60_3.jpg (66.35 KB, 800x600 - viewed 729 times.)
« Last Edit: September 12, 2013, 11:51:31 AM by sundaram » Logged
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« Reply #17 on: September 12, 2013, 11:53:47 AM »
saintofinternet
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hi,

would like to contribute a little....

i am new to this field of RC Flying but Radio and Wireless is my bread and butter so now with the discussion happening above I would like to give some inputs on the antenna part...


the antenna is a passive device in radio communication and it is just a radiator which will be radiating the electromagnetic wave to and fro from the radio.

everyone is talking about a high gain antenna but you should understand the power of the radio output also  at the same time....

the antenna is like a pipe and the higher the gain the smaller the nozzle for farther reach... but all this depends on the the radio which acts like the water pump....behind the pipe... if the pump itself does not have enough power to throw the water the entire pipe and nozzel is of not much use....

so i don't know how much is the power (in dBm) of the radios in the RC Flying equipment...
if someone can help me get it we will be able to calculate the transmission distance between the Controller and Flying Object by calculating the FSL (Free Space Loss) with 2.4 GHz spectrum.
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« Reply #18 on: September 12, 2013, 12:05:35 PM »
sundaram
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I would request you to throw more light on the difference in pattern of radiation in a low gain omnidirectional which is more spherical and a much flatter and elliptical pattern with farther reach for a high gain omni directional antenna. This is more pertinent for a RC flying scenario and a long range flying case.
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« Reply #19 on: September 12, 2013, 03:03:54 PM »
saintofinternet
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hi sundaram,

thank you for the reply.

the radiation patterns can be drawn based on the antenna gain and the polarization....

i assume we will be using single polarization in the RC flying hence any one either vertical or horizontal will work...

attaching some sample images to this post and explanation give below for each image.


8dbidirection.gif  --> 8 dBi panel (directional) antenna radiation patterns in vertical and horizontal
http://s7.postimg.org/fyd3c8o97/8dbidirection.gif
Antenna for 2.4Ghz 11dBi Omnidirectional - Extend the range

*************************************************************************

14dbipanel.jpg  --> 14 dBi panel (directional) antenna radiation patterns in vertical and horizontal
http://s13.postimg.org/faqh3qumv/14dbipanel.jpg
Antenna for 2.4Ghz 11dBi Omnidirectional - Extend the range

*************************************************************************

23dbidirection.gif  --> 23 dBi panel (directional) antenna radiation patterns in vertical and horizontal
http://s21.postimg.org/hg0a6g1iv/23dbidirection.gif
Antenna for 2.4Ghz 11dBi Omnidirectional - Extend the range

*************************************************************************

omnipattern.jpg  --> 5 dBi Rubber Duck (Omni directional) antenna radiation patterns in vertical and horizontal
http://s11.postimg.org/vvpi9nx0z/omnipattern.gif
Antenna for 2.4Ghz 11dBi Omnidirectional - Extend the range

*************************************************************************

in case a panel antenna is replaced by a grid type antenna with the same gain the beam becomes even more tight traveling farther but at the same time the aperture also reduces hence it require more precision pointing the beam to the recv. side.
8dbidirection.jpg
Re: Antenna for 2.4Ghz 11dBi Omnidirectional - Extend the range
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« Reply #20 on: September 13, 2013, 09:53:37 AM »
mbt1370
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Price is reduce 900 + shipping
Thanks
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« Reply #21 on: September 22, 2013, 05:12:21 PM »
mbt1370
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price reduce 800 + free shipping
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« Reply #22 on: September 26, 2013, 12:04:47 PM »
mbt1370
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we have another Brand New 20 dbi Antenna. [Price 1300/-] Free shipping

You can directly connect with your Booster or fr-sky module.

Connector : RP-SMA (male) (No pin inside)
Antenna Length : 38 cm(15.2inch)
Any one Need than contact me Or PM me.

some images.
a1.jpg
Re: Antenna for 2.4Ghz 11dBi Omnidirectional - Extend the range
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« Reply #23 on: September 29, 2013, 09:38:46 AM »
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 Brand New 20 dbi Antenna. [Price 1200/-] Free shipping
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« Reply #24 on: October 10, 2013, 08:19:29 PM »
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