Dear all I have the bellow A2DP bluetooth module which has a zigzag microstrip antenna. I want to extend the gain in the antenna with my 20db wifi antenna.
I know as far as that I need to scrape the majority of the zigziag antenna off. Then solder my antenna extension to the remaining bit.
Which of the two 2.4GHz antenna wires do I connect to the remaining zigzag microstrip antenna (the inner wire or the outer wire?).
Is a ground plane necessary? If so where is the ground plane on this circuit board and how would I connect the two 2.4GHz wires to this board to achieve the best gain?
This is quite new to me, thank you for all your help!
I have cut off the microstrip antenna and soldered on the SMA central wire to what remained from the microstrip antenna. I have also cut the on board copper connections where I have shown in the close up with a sharp knife .
Whether I leave the coax outer shield 'F' disconnected or soldered to what I think is ground, point 'G' I can't pick up this bluetooth device on any of my devices (it used to work before attaching the new antenna).
Also I have noticed that the point 'G' which is what I think is ground is the same potential as the (-) black power wire and also the same potential as the central SMA antenna wire which I have soldered to the board.
So they must somehow be connected. Not sure if this is meant to be like this? So if point 'G' is the same as potential as the negative power wire, should the middle of the coax wire be also the same? Have I shorted a connection somewhere?
What have I done to make this bluetooth device stop being received. Added note it still powers up and lights up.