1.2G Patch Antenna...Tune it for 1280mhz...Model # RE1208P.

[Henrikorg1]

Hi and thx for the reply,i have found it an ordered one from outside denmark,i got cloverleafs on my 1280 mhz 1500mw right now but havent tested it yet after upgrading from 5.8ghz,im still waiting for new carbon fiber propeller after original plastic one explodet in the air,known problem with the hobbyking discover model.
I think i might gone little overkill with 1500 mw ?
Do you use 2,4 ghz radio and if do you use filter on fpv tx to avoid double pathing i think its called so fpv tx doesnt interfere with radio rx ?
I have this one installed betwen fpv tx and antenna


Is it ok i ask this question in your thread ? If not i will delte it again.

[Coyote]

You went way too overkill with 1.5 Watts of power, you are just going to saturate your airframe with noise reducing range and increasing interference.

Do you use 2,4 ghz radio and if do you use filter on fpv tx to avoid double pathing i think its called so fpv tx doesnt interfere with radio rx ?

Its called harmonics, 2.4GHz is the second harmonic of 1.2GHz so the filter will not help, especially with a 1.5 Watt vtx.

You are much better off using a 200mW or 400mW vtx. That will see you for well over 20km range easily. But don't use 1.2GHz with 2.4GHz. They just don't play well together for the reason above.

[Henrikorg1]

Ok and again thx for answering,i better think this through a little more,i just read on fpvlab that some of the users there did use 1,2 and 2,4 together with filters and i noob as i am thought boosting power would help adding some extra range,i was aware that such high  numbers couldt create interference so thats also why my radio have been modet to accept a 2000 mw signal amplifier together with a 6-8 dbi gain antenna,i dont plan to go 20 km range before i have the nescesary skills to do it,but someday i want to go further .

[English Turbines]

Ok and again thx for answering,i better think this through a little more,i just read on fpvlab that some of the users there did use 1,2 and 2,4 together with filters and i noob as i am thought boosting power would help adding some extra range,i was aware that such high  numbers couldt create interference so thats also why my radio have been modet to accept a 2000 mw signal amplifier together with a 6-8 dbi gain antenna,i dont plan to go 20 km range before i have the nescesary skills to do it,but someday i want to go further .

Henri,
             Please be aware, the 1280mhz tuned Patch antenna in my blog is a LINEAR antenna....You cannot use a Skew on your vtx of any kind with it as you mentioned...!!!
  You need a Rubber Duck or better, a tuned Dipole on your vtx if you want to use the Patch.

Also, 1500mw is rather a lot of power for 1280mhz, as Coyote said, your plane will drown in RF from your vtx....
Adding a 2 watt amp to your 2.4g radio doesnt sound like a good idea either....You need a lower frequency like 433mhz for your control link...
Anyway tell us how you get on with it....:)

:vulture:

[English Turbines]

Update: July 31st 2016.

Recent testing of the 1280mhz Tuned Patch Antenna Module has been pretty good using the Bixler 2 as a testbed.
  The HS 1177 Sony FPV Camera with WDR set to ON, plus a few other small adjustments, I am now getting good, bright and clear DVR recordings....The best improvement gained was by plugging my cheapo HK DVR directly into the Lawmate VRX with a short RCA Splitter Cable. The Video signal is then being Relayed by a low power 25 mw Immersion VTX to my Diversity Monitor. Apart from a very minor periodic "pulsing" of the signal, Im getting some fairly good reception, albeit at close range (2 kms).

Up until now, I have been using the (very large) Rubber Duck antenna on the little 200mw VTX....I am about to try the 1280mhz tuned, Inverted Vee Dipole as purchased from Flytron....see pic.
  The active element is above the wing in this picture, not sure quite how to orient this antenna?..(Good service from Flytron BTW.)

Anyone else used this type of Vee antenna with a vertically polarised Patch..?....and do I need to orient it differently?

 


:vulture:

[Coyote]

That is the way it is supposed to be but the. Think you will find results disappointing compared to a dipole.

With a Bixler though with 1.2GHz you won't need anything more than a dipole on each end.

[English Turbines]

That is the way it is supposed to be but the. Think you will find results disappointing compared to a dipole.

With a Bixler though with 1.2GHz you won't need anything more than a dipole on each end.

Hi Ian,

Yeah, I just ordered the normal tuned 1280 Dipole for the SW1900 from Flytron...For £6.50 its not worth trying to make one..!!
   Since this will have an AP. I hope to push out considerably further than 2 kms at some point....I also have another 200mw VTX which I will fit initially, so I can maybe compare the two...?  Pretty sure the Bixler 2 could fly out at least 7kms with 4000mah on board in calm conditions...Only it has no RTH, so I won't be trying that...:)

   If anyone else has tried one of these Flytron Inverted Vees, I'd like to hear about your experiences....?

:vulture:



 
 

[Dizzy]

 If anyone else has tried one of these Flytron Inverted Vees, I'd like to hear about your experiences....?

Hi ET i used a couple on 1.2 they worked fine had a play with one of my gliders too with this set up but i have gone back to the skews for most of my flying as i rarely go beyond 2k here as the coast to coast distance is roughly that I flew out to a tanker last year but had to flat turn to avoid zero picture but that was out around 4k.
Close in i didn't find much difference between the omni and a Vee tbh i find the omni easier to fit ;) I have a couple of 1280 patch's here i may tweak for the Autumn nice thread btw  ;D

dizzy :D

[English Turbines]

If anyone else has tried one of these Flytron Inverted Vees, I'd like to hear about your experiences....?

Hi ET i used a couple on 1.2 they worked fine had a play with one of my gliders too with this set up but i have gone back to the skews for most of my flying as i rarely go beyond 2k here as the coast to coast distance is roughly that I flew out to a tanker last year but had to flat turn to avoid zero picture but that was out around 4k.
Close in i didn't find much difference between the omni and a Vee tbh i find the omni easier to fit ;) I have a couple of 1280 patch's here i may tweak for the Autumn nice thread btw  ;D

dizzy :D

Hi Dizzy,

                  Since the Bixler 2 only has a Tiny OSD, I have as yet only been out to 2.4kms on the Flytron Vee...It seems to work good combined with the 1280 tuned Patch....Since then, I have also got a more normal 1280 tuned Dipole from Flytron which will go on my Skywalker 1900...Have to say though, that the large hi gain Ducky that comes with VTXs also gives a very clear image as well, with little or no Multipathing...I like the Dipoles on the plane, the Skews are rather large and cumbersome...Check out my edited Bix 2 clip on my channel for a look see...its only a 200mw vtx remember...:)

Cheers.....E.T.

:vulture:

[English Turbines]

 Update..Jan 2017.

The Bixler 2 has now been out to 4kms using the tiny 200mw 1280mhz VTX.

The 1280mhz Tuned Patch with 5.8G Relay in this Thread was used at the receive end.

A little risky given that the Bixler 2 has no AP, but for those still interested in this well viewed thread, here is the live downlink taken directly from the LawMate VRX. The Bixler is still using the Vee Dipole as shown in this thread, but TBH, the standard RD seems to work just as well.
The DVR was the Hobby King one...lol.

  Please do not share the unlisted Clip below....

:vulture:

[marcin]

As Ian asnwer above go for dipoles for 1.2Ghz gear, vee never work for me better then simple dipole tbh.
Flights up to 5-6km were fine all around with dipoles and exactly same patch :)

[English Turbines]

As Ian asnwer above go for dipoles for 1.2Ghz gear, vee never work for me better then simple dipole tbh.
Flights up to 5-6km were fine all around with dipoles and exactly same patch :)

Well, the Vee Dipole did work ok for me, it just wasnt quite as good as the plain Dipole...Maybe different on a fixed wing compared to a multirotor perhaps...?

       :vulture:

[dp106]

I was thinking of trying a dipole on my 1.3 gear as its a lot smaller but am I reading it right that they are linear antennas?  Currently using IBcrazy bluebeams but they're rather large. 

Any reason why everybody seems to use 1280?  I realised I was using a different frequency so thought I would try it but it seemed my UHF was suffering a lot more at this frequency.

[English Turbines]

I was thinking of trying a dipole on my 1.3 gear as its a lot smaller but am I reading it right that they are linear antennas?  Currently using IBcrazy bluebeams but they're rather large. 

Any reason why everybody seems to use 1280?  I realised I was using a different frequency so thought I would try it but it seemed my UHF was suffering a lot more at this frequency.

Hi,

A Dipole is a linear antenna, and yes, its considerably smaller than a skew...The Patch antenna in this thread is also a vertically polarised linear antenna designed to be used with a RD or a Dipole on your vtx...If its affecting your UHF link, that could be due to a number of reasons. Without specific info about your aircraft setup, its hard to say for sure.

     :vulture:

[dp106]

The only difference was I changed the channels on the vtx and receiver. I'm using the Partom gear from Banggood. VTX is out on one wing of the mini Talon and UHF is out on the other wing. I swapped from channel 6 to channel 9 which I think is 1160 to 1280.  There was no reason why I had chosen 1160 that was just what it ended up on! :)