Talk to an Antenna Guru , Been at this for over 40 years ( GW4LWD )

Multicoptertec · Jun 21, 2016

Can't see it very well, but it could be for tuning, or impedance matching stubs.

Pcdeveloper2014 · Jun 21, 2016

Gasturbine said:
Phew , 3 miles out!, I would think battery volts might start to increase your heart rate?, from my qth location in a wooded clearing I can manage a mile, so need to try it in the clear to see what can be done, 73 G4IKI

look at this . that will make you pucker some....

Pcdeveloper2014 · Jun 21, 2016

RocketBrew said:
What would you consider the design of the stock antenna on the W300 controller to be?
Some sort of patch design?
"Front":View attachment 57760 "Back":View attachment 57764

that is 4 dipoles fed in phase. good performance those.

Multicoptertec · Jun 21, 2016

Maybe co-linear folded dipoles?

Pcdeveloper2014 · Jun 21, 2016

Multicoptertec said:
Maybe co-linear folded dipoles?

sure is ,,

Multicoptertec · Jun 21, 2016

Here is a link to a similar design, with theory of operation.

http://www.jpier.org/PIERC/pierc21/13.11032104.pdf

RocketBrew · Jun 21, 2016

Multicoptertec said:
Here is a link to a similar design, with theory of operation.

Interesting, looks like I had the front and back sides reversed.

Y. F. Li; B. H. Zeng; C. W. Chen and D. C. Chang; Z. R. Li and J. B. Liu; H.-B. Liang
At least one of the authors probably works at DJI now...

Pcdeveloper2014 · Jun 21, 2016

Multicoptertec said:
Here is a link to a similar design, with theory of operation.

http://www.jpier.org/PIERC/pierc21/13.11032104.pdf

there is a version on lower frequencies where we stack 1/2 wave coax stubs end to end , ok for UHF as the size is reasonable .

dirtybum · Jun 21, 2016

I'm not an antenna guru or a radio operator, but I got to say guys, I read this thread start to finish and it's the most interesting thing I've read on this forum in a while ! Can't wait to follow it along.

Procharged97 · Jun 21, 2016

Hi PC had a question about helicals..i always see the spacing to be a 1/4 wavelength. ..if you reduce this to say 1/8 or 1/16 would this increase strength and would impedance change?

Gasturbine · Jun 21, 2016

Pcdeveloper2014 said:
look at this . that will make you pucker some....

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Amazing!, ......so that gives us 12miles to empty and 17mins at 38mph , usefull to know

maxwell smart · Jun 21, 2016

ryanmanchester said:
She's finished, neighbours be like "is he espionage'in" [emoji85][emoji85][emoji85][emoji85][emoji23]

Sent from my iPhone using PhantomPilots mobile app

Can you elaborate on you ground station??
That is kick ***.

RocketBrew · Jun 21, 2016

What I am looking for is a replacement for the stock "co-linear folded dipole" antenna that were removed when the remote was modded for times when a bigger antenna is not required.
Any suggestions on what search terms I can Google with?
The antennas with a RP-SMA connector I have found so far are typical omni-directional or those with the big plastic rectangle. Examples:
2.4GHz 6dBi Indoor Omni-directional Antenna
2.4GHz/5GHz 10dBi high gain directional indoor panel antenna

Pcdeveloper2014 · Jun 22, 2016

RocketBrew said:
What I am looking for is a replacement for the stock "co-linear folded dipole" antenna that were removed when the remote was modded for times when a bigger antenna is not required.
Any suggestions on what search terms I can Google with?
The antennas with a RP-SMA connector I have found so far are typical omni-directional or those with the big plastic rectangle. Examples:
2.4GHz 6dBi Indoor Omni-directional Antenna
2.4GHz/5GHz 10dBi high gain directional indoor panel antenna

After modding the RC controller , when you have taken off the paddle antennas , you can get all type of antenna to fit on there.
in general use the ItElite fits the bill ad its light and linear .