Re-posting this because I think the original is in the wrong forum:The short video above is me losing control of my plane. I have a theory of what happened, but I'm not sure. Could I please get a…Continue
Also, I forgot to mention if your goal is just a flat antenna, that can easily be done with regular round copper wire and dollar store foam board. I have seen Yagi-Uda, Moxon, and dipole loop antennas in this configuration,"
There are already many printed antennas available and in use. For example:
The CP patch on almost all GPS receivers.
Most bluetooth radios.
The Wi-Fi antennas built into the LCD of your laptop.
Your car remote.
Your garage door…"
"You seem to be implying that what I said is factually incorrect because I'm not displaying an attitude you approve of.
That particular logical fallacy is called ad hominem, an attack which is not in keeping with the Ham Spirit, either.
"I don't think that document says what you think it says. It says that a poorly-sourced 11mm OD ferrite bead can be resonant at up to ~3 GHz. It is not resonant at higher frequencies than that. Also, larger ferrites and ferrites with higher…"
"I just re-read the choke comment, and I realized that Gisela and/or Joe were talking about both air core and ferrite chokes for some reason, so I was a little off on that, but I need to clear up something else about that.
Gisela and/or Joe said that…"
"Also, to clear up a few disconnects:
A ferrite choke has a ferrite core. Ferrite is an iron-oxide ceramic material. The choke that Gisela and/or Joe showed in a previous comment was an air-core choke. Air core chokes are too big to be useful in RC.…"
I think the problem you're having with this antenna may be due to the description of it on fpvmanuals. It says "the turnstile antenna is dual polarized and will help mitigate issues with polarization". Not only is that not…"
"Since Gisela and Joe seem to have glossed over some things, I thought I would explain a few RF concepts:
When an RF signal is transmitted down a coaxial cable, both the center conductor and outer shield carry the same amount of power, with opposite…"
Those two things are not mutually exclusive.
Most "rubber ducky" antennas that come with LRS, telemetry systems, and hand-held radios are less-efficient normal-mode helical 1/4-wave monopoles, in order to tune them to…"
"You might ask Robert Blair, who's actually using drones in the "grains industry" (that's an interesting term; here we usually just call it "agriculture"). Robert has a blog and has been profiled on DiyDrones a few…"
"Maybe someone from a non-US area can chime in on this...I live in the US and one of my clients just purchased UAV from a European manufacture. We were talking about the public view of UAVs, Drones, UAS, etc and he said Americans seem to be more…"
"the problem Flying monkey is that for most people that the real benefits UAV are n fields they will never see. (like Agriculture, Aerial Mapping, Search & Rescue) on the other hand personal UAVs are not likely to add much benefit to the general…"
You are probably familiar with optical flow sensors which provide extremely precise measurement of ground speed (and therefore position) for quadcopters and computer mice. The PX4FLOW is the most-recent example but there are many…