antennas from scrap computers

[Alex Fraser]

You can fit a whole bunch of 13 centimeter band antennas in a small 
plastic jar.  That's just what I did when I scrapped out some older 
laptops.  The antennas are usually behind the display screen so when it 
is being used the antennas sit up a bit from your desk.  The tiny coax 
runs behind the screen and next to the hinges to the WiFi card on the 
laptop's motherboard.

It looks to me like some of these antennas are J Poles, I hope you can 
see where I circled the matching coax location.

My application for these antennas is as  replacements for busted WiFi 
antennas on a DJI Phantom 3 drones video and telemetry download radio.  
I bought the drone used and it had been in a crash, so I got a good 
price.  The original antennas had their cables yanked apart. The 
originals were panel antennas and go used for  $20 ~ $30. I might try 
both kinds and see how they work in the crazy drone environment. Drones 
move around so polarity and pattern have to be figured into the 
antennas.  There is a lot of ham input into the drone hobby.  Having 
almost 40 years experience playing with antennas sure helps...


Antennas
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