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UAV link range extension

Started this discussion. Last reply by Fahad Naseer Jun 6, 2010. 12 Replies 0 Likes

range extension

Started this discussion. Last reply by Greg Fletcher May 30, 2010. 4 Replies 0 Likes

UAV Reciever

Started this discussion. Last reply by Fahad Naseer Feb 2, 2010. 5 Replies 0 Likes

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Fahad Naseer replied to Fahad Naseer's discussion 'UAV link range extension'

900 MHz.

Jun 6, 2010

Fahad Naseer replied to Fahad Naseer's discussion 'UAV link range extension'

Dear i am using vertically polarized monopole antenna on UAV of 900 MHz (.33 wavelength). but now i have replaced it with helical antenna of 5 turns at 900 MHz that of circular polarization, and at the ground station i am using helical antenna gain…

Jun 6, 2010

Lew Payne replied to Fahad Naseer's discussion 'UAV link range extension'

I notice that you really like to remain vague, and not give any information which would "lock down" your answers (and thus subject them to public scrutiny). This will be the last post I'm making in this thread, for obvious reasons.…

Jun 6, 2010

Morli replied to Fahad Naseer's discussion 'UAV link range extension'

Fahad, can you pls post the link to your antenna and tx module? I am curious about "antenna is 17 dB" as to how/where you got that number. Thanks

Jun 6, 2010

Morli replied to Fahad Naseer's discussion 'UAV link range extension'

I guess it is 400 mhz UHF <10mW module if my memory serves right( unless he has moved from it to better module since then)

Jun 6, 2010

RoboCopter replied to Fahad Naseer's discussion 'UAV link range extension'

What frequency does it work on?

Jun 6, 2010

Fahad Naseer replied to Fahad Naseer's discussion 'UAV link range extension'

there are losses but the cost for antenna is very less, efficient results , so there is a trade off between losses and cost.

Jun 6, 2010

Lew Payne replied to Fahad Naseer's discussion 'UAV link range extension'

One note of curiosity... since you're using a helical antenna at the ground station end, and since helical antennas come in either LHCP (left-hand circular polarization) or RHCP (right-hand circular polarization) depending on which direction…

Jun 3, 2010

Lew Payne replied to Fahad Naseer's discussion 'UAV link range extension'

Helical antennas were invented in the 1940's by John Kraus (W8JK). Is there anything substantially different in your design that makes it stand out when compared to the standard helical antennas that have been developed over the years (see this…

Jun 2, 2010

Fahad Naseer replied to Fahad Naseer's discussion 'UAV link range extension'

yes i have diagrams for major and minor lobes. Yes size is also larger but it is for ground station will work as a reciever.

Jun 2, 2010

Lew Payne replied to Fahad Naseer's discussion 'UAV link range extension'

UAV wireless links can take place on several different bands; which band are you referring to, in particular? Also, as you already know, the UAV as well as the ground station requires an antenna; which are you referring to, in particular? To obtain…

Jun 2, 2010

Taylor Cox replied to Fahad Naseer's discussion 'UAV link range extension'

Are you talking about an antenna for the xbee communication modules?

Jun 2, 2010

UAV link range extension

Dear All, I have designed a helical antenna to extend the range of UAV wireless link, now i am thinking to write a research paper on it, which i have achieved. The gain of that antenna is 17 dB, please all of u tell me that should i proceed with this idea or not? is it good or bad? Regards See More

Discussion posted by Fahad Naseer Jun 2, 2010

12 Comments 0 Likes

Greg Fletcher replied to Fahad Naseer's discussion 'range extension'

I am assuming you have the Xbee PRO 900 50 mW. It should easily go min 1 mile LOS on the ground with standard antennas. Something is wrong here? With a well aimed yagi you should go for many miles.

May 30, 2010

Martin Seven replied to Fahad Naseer's discussion 'range extension'

25 m sounds really bad, even a 1mW transmitter should give you hundreds of meters range with just monopoles. You could have a problem somewhere in your setup. A helical antenna is more directional, so yes, it will improve your range.

May 30, 2010

Fahad Naseer replied to Fahad Naseer's discussion 'range extension'

I am using 900MHz monopole antenna,and the range was 25 meters, that transmitter was at a distance of 25 meter from receiver, and now i have designed helical antenna. is it good to improve the link range?

May 30, 2010