antennas from scrap computers

[Samudra Haque]

Phased arrays? PA controller chips are plentiful

On Sun, Oct 30, 2022, 15:53 Alex Fraser <beatnic at comcast.net> wrote:

> 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...
>
>
> [image: Antennas]
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