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The rubber ducky antenna (or rubber duck aerial) is an electrically short monopole antenna that functions somewhat like a base-loaded whip antenna. It consists of a springy wire in the shape of a narrow helix, sealed in a rubber or plastic jacket to protect the antenna.[1] The rubber ducky antenna is a form of normal-mode helical antenna.
Electrically short antennas like the rubber ducky are used in portable handheld radio equipment at VHF and UHF frequencies in place of a quarter-wavelength whip antenna, which is inconveniently long and cumbersome at these frequencies. Many years after its invention in 1958, the rubber ducky antenna became the antenna of choice for many portable radio devices, including walkie-talkies and other portable transceivers, scanners and other devices where safety and robustness take precedence over electromagnetic performance. The rubber ducky is quite flexible, making it more suitable for handheld operation, especially when worn on the belt, than earlier rigid telescoping antennas.
Two rumors link the naming of the antenna with the Kennedy family.[1] In the early 1960s the rubber ducky became the antenna of choice for personal walkie-talkie transceivers used by police and security services, including the U.S. Secret Service, which guards the President of the United States. According to one rumor, the young Caroline Kennedy, daughter of President John F. Kennedy, named the flexible device when she pointed at one on an agent's transceiver and said, "rubber ducky". On the other hand, Thomas A. Clark, a senior scientist with NASA, claims to have named it after listening to one of Vaughn Meader's comedies about the Kennedy family.
Before the rubber ducky, antennas on portable radios usually consisted of quarter-wave whip antennas, rods whose length was one-quarter of the wavelength of the radio waves used.[1] In the VHF range where they were used, these antennas were 0.6 or 0.9 m (2 or 3 feet) long, making them cumbersome. They were often made of telescoping tubes that could be retracted when not in use. To make the antenna more compact, electrically short antennas, shorter than one-quarter wavelength, began to be used. Electrically short antennas have considerable capacitive reactance, so to make them resonant at the operating frequency an inductor (loading coil) is added in series with the antenna. Antennas which have these inductors built into their bases are called base-loaded whips.
The rubber ducky is an electrically short quarter-wave antenna in which the inductor, instead of being in the base, is built into the antenna itself. The antenna is made of a narrow helix of wire like a spring, which functions as the needed inductor. The springy wire is flexible, making it less prone to damage than a stiff antenna. The spring antenna is further enclosed in a plastic or rubber-like covering to protect it. The technical name for this type of antenna is a normal-mode helix.[5] Rubber ducky antennas are typically 4% to 15% of a wavelength long;[5] that is, 16% to 60% of the length of a standard quarter-wave whip.
Like other electrically short antennas the rubber ducky has poorer performance (less gain) due to losses and thus considerably less gain than a quarter-wave whip. However it has somewhat better performance than an equal length base loaded antenna. This is because the inductance is distributed throughout the antenna and so allows somewhat greater current in the antenna.
Rubber ducky antennas have lower gain than a full size quarter-wavelength antenna, reducing the range of the radio. They are typically used in short-range two way radios where maximum range is not a requirement. Their design is a compromise between antenna gain and small size. They are difficult to characterize electrically because the current distribution along the element is not sinusoidal as is the case with a thin linear antenna.
From these rules, one can surmise that it is possible to design a rubber ducky antenna that has about 50 Ω impedance at its feed-point, but a compromise of bandwidth may be necessary. Modern rubber ducky antennas such as those used on cell phones are tapered in such a way that few performance compromises are necessary.
Some rubber ducky antennas are designed quite differently than the original design. One type uses a spring only for support. The spring is electrically shorted out. The antenna is therefore electrically a linear element antenna. Some other rubber ducky antennas use a spring of non-conducting material for support and comprise a collinear array antenna. Such antennas are still called rubber ducky antennas even though they function quite differently (and often better) than the original spring antenna.
I got my ducky a few days ago and when i plugged it in for the first time nothing happened. I knew that a Hello World script was supposed to run. I thought that maybe it needed the right firmware so i flashed it with c_ducky.v2.1.hex using the master zip. I contacted Hak5 regarding my issue but still no response. I wrote my script, encoded it, and put it on the sd card. Still nothings happening. Please Help!
Else maybe you tried flashing one of the 3rd party firmware's and bricked the ducky? If so then try and get back to DFU boot mode by holding in button while plugging in. You may need drivers. But if hardware is detected (ideally a DFU device) then you should be able to recover. However if you cant get a working DFU bootmode (if there was a bad flash or not) then it looks like it may be a dead duck.
I appreciate your response, I put the file this way on two different sd cards (the same one I got in the order and another one I made sure I had for backup) in both cases as soon as I connect the ducky to the computer I get a solid red light.
I have gone over the possible problems here ( -us/articles/360010555093-My-USB-Rubber-Ducky-shows-a-solid-red-LED-now-what-) and I can not troubleshoot where the problem is in my case.
maybe someone how sees this can share some wisdom with me ?
Hi, ive had a few rpi picos lying around for while and recently I saw a vid turning it into a rubber ducky and I wanted to give it a try, but for some reason it just isn't working. Ive tried every possible combination of circuitpy and adafruit versions and I just cannot get it to work. ive tried downloading the 6x versions and that doesnt work, ive tried the 7x version, the 7.1.3.3 the 7.1.1.1 and it just does not execute the payload. ive changed the code.py to the correct one from the github website, ive put the payload as payload.dd and ive even tried it all on a second raspberry pi incase the first one is broken and just NOTHING seems to be working. If anybody has any ideas it would be very greatly appreciated. Thank you so much to everyone in advance!
The rubber ducky rooms were always intended to be a simple in joke that couldn't be seen on the screen because of 1980s and 1990s TV screens, however in the days of HD remasters and of Lower Decks being unafraid to reference literally anything, it seems they are real.
On almost every starship we see, there is a giant rubber ducky in an isolated room somewhere in the heart of the ship. Tendi and Rutherford mention that it is specifically off limits, a restricted area that they could get into trouble for entering without permission.
Personally, I have my doubts that this is some kind of scientific instrument that just happens to be shaped like a duck. Considering how cheeky military slang can be, I wouldn't be totally surprised that they called such a device "the rubber ducky", but it seems unlikely.
Instead, I think to explain this we need to look at what Starfleet and the Federation are really about, that is peaceful contact with alien species. I propose that the rubber ducky rooms are a result of a strange clause in an important treaty with a powerful race.
Perhaps this race looked down on the Federation for being much "younger", but agreed to share some of their technology on the grounds the Federation agreed to something absurd, such as putting a giant rubber ducky on every starship in its own special room, only to be shocked and amused when they are met with an "Absolutely, we have the space".
Alternatively it could be a Q, Trelane, or Douwd style alien who told the Federation he would destroy them if they didn't install rubber ducky rooms, with no intention of backing it up. Perhaps he is still laughing about it to this day.
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I love this particular story because it makes it crystal clear how the critical part of rubber duck problem solving is to totally commit to asking a thorough, detailed question of this imaginary person or inanimate object. Yes, even if you end up throwing the question away because you eventually realize that you made some dumb mistake. The effort of walking an imaginary someone through your problem, step by step and in some detail, is what will often lead you to your answer. If you aren't willing to put the effort into fully explaining the problem and how you've attacked it, you can't reap the benefits of thinking deeply about your own problem before you ask others to.
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