Guys i own a flysky t6 transmitter. recently i found that the range has reduced to a couple of meters. when checked inside by multi meter i found that the inner element in antenna has been shorted. I found same type of wire from my damaged laptop. but i have no idea about. the length needed for antenna wire and length needed for the part where no shielding is needed. antenna got a metal round base shield which i recovered from antenna. I watched a lot of videos on YouTube for dimensions and non describe about the dimensions required for transmitter antenna. i an really confused. if anyone know the dimensions pls replay. I am willing someone got the real idea about what i am talking. Pls help. I think stock antenna is 3db. And dimensions of lower and higher gain can be shared
theory says that antenna length must be at least lambda/4
lambda being the wavelength.
Now for a freq of 2.4 GHz, lambda =0.125 m
that brings antenna length to =0.031 m or 3.1cm approximately.
and I THINK that this must be the unshielded length.
Same type of wire ?
If it's the WiFi's antenna use it , no mods or need of removing shield ! WiFi's frequency is same ,
Or you can get replacement antenna wire from some one ,
Bro. I made the antenna by 3.1 cm (length of unshielded portion). But the problem now face is when i checked(multi meter on circuit check mode)the ground and main connection where i have to solder the antenna the multimeter is showing that there is connection between them(multi meter is buzzing). Is that normal???
Or is ther any problem with internal connection of transmitter????
Does anyone have any idea??? please help. I am stranded.
post a pic of what exactly is your issue, its much easier to understand.
Quote from: khan007 on May 15, 2016, 04:23:19 PM
Bro. I made the antenna by 3.1 cm (length of unshielded portion). But the problem now face is when i checked(multi meter on circuit check mode)the ground and main connection where i have to solder the antenna the multimeter is showing that there is connection between them(multi meter is buzzing). Is that normal???
Or is ther any problem with internal connection of transmitter????
That is perfectly normal. - using a DC meter , it will read low resistances b/w the gnd and antenna pad of a rf module , close to few ohms.
But actually it's the measuring method which is wrong , an RF or antenna feed is AC. DC measurement systems are of no use here .
The same ground and antenna pads that your multimeter thought are short circuited , might read 10's of ohms of impedance at 2.4Ghz (that is when measured with the proper equipments! , Your DC resistance measuring device will still show a short circuit !! ).
So don't worry about it , put it back , make sure to solder properly and do a range test (ground and air) before you fly out in the open .
Done the soldering and had put it back like stock one. But still no range. I still dont know whtas the real problem is???. Thankz for reply bro. Its a great relief that the tx is good in shape.
Again a simple doubt. Is the antenna unshielded portion length same for tx and rx