I want to replace the antenna on my toy quadcopter with a better one, to improve reception.
On toy quadcopters the antenna is just a simple wire soldered to the quadcopter circuit board (with no shielding nor ground connection, just like this board for example: https://www.eachine.com/Eachine-E016...de-p-1378.html ).
On the othe hand, the antenna that I want to put is a proper 2.4ghz dipole antennas, with a shielded coaxial cable.. ( like this one: https://shop.prodrone.pl/en_US/p/Goo...nna-2.4Ghz/163 )
from my understanding, besides connecting the active element to the circuit biard, I should also connect the shielding of the coax to the electrical ground of the board.
My question is: how do I find a ground connection on those toy boards ? Is it correct if I connect the coax shielding directly to the negative cable of the battery/power supply ? ( I ask this because I have read that all the ground pins / the ground plane of the PCB flows back to the negative connection of the battery ).
thx for any pointer and/or correction! I am very ignorant in electronics, but I hope I managed to make sense..
PS: I know that there is also this question that is fairly similar: How to ground wi-fi antenna outer wire on circuit board connector? But it doesnt answer the following points of my questions: - how do I find a ground connection on those toy boards ? (what is the general procedure to find a ground pin ?) - can I simply connect the shielding if the coax to the negative battery cable and assume that it is grounded that way ?