<div dir="auto">Phased arrays? PA controller chips are plentiful</div><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">On Sun, Oct 30, 2022, 15:53 Alex Fraser <<a href="mailto:beatnic@comcast.net">beatnic@comcast.net</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
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<p><font face="Comic Sans MS">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.</font></p>
<p><font face="Comic Sans MS">It looks to me like some of these
antennas are J Poles, I hope you can see where I circled the
matching coax location.</font></p>
<p><font face="Comic Sans MS">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...</font></p>
<p><br>
</p>
<img src="cid:part1.csd006Jg.7bnZwUeF@comcast.net" alt="Antennas" width="800" height="1066">
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