Electronics > Beginners

What is this smd component next to 5.8 antenna

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Erwin Ried:
Hi, I have a small camera with a 5.8ghz transmitter that was not working properly (very weak signal) and trying to adjust the antenna ground, I desoldered (and lost) a component by mistake. Can anyone help me identify which component did I remove?:


As shown it is connected to the central pole of the antenna.

More images:
https://www.banggood.com/Eachine-TX02Pro-TX02-PRO-with-Smartaudio-AIO-5_8G-40CH-200mW-VTX-700TVL-14-Cmos-FPV-Camera-NTSC-p-1421133.html?rmmds=myorder&cur_warehouse=CN

Thanks a lot!

xrunner:
Might be an inductor ... hard to really say.

Erwin Ried:
One hint: it is not a 0 ohm resistor. I connected one and the board gets really really hot fast.

tautech:
Most likely as it's unmarked a RF coupling cap. Leave it there.

PA0PBZ:

--- Quote from: Erwin Ried on February 06, 2020, 12:24:52 am ---One hint: it is not a 0 ohm resistor. I connected one and the board gets really really hot fast.

--- End quote ---

Then it must be a capacitor, but the value is anyone's guess. If it is just coupling 100-1000 pF should work but if it is also for impedance matching it could be anything from a few pF's to 50 pF and critical.

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