Researchers capture an image of negative capacitance in action

Discussion in 'Amateur Radio News' started by WA4CZD, Jan 21, 2019.

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  1. KA0HCP

    KA0HCP XML Subscriber QRZ Page

    With regard to negative capacitance and voltage this is a case of "Less is more!". :)
     
  2. W1YW

    W1YW Ham Member QRZ Page

    I admit it...

    I have a forward bias!
     
    KA0HCP likes this.
  3. KW0U

    KW0U Ham Member QRZ Page

    Been using it in a flux capacitor for years.
     
  4. KI7SS

    KI7SS Ham Member QRZ Page

    We saw this effect last Winter Field Day at about ten pm, when a fifth-grader substituting for the regular operator dropped his cell phone into spilled cola during a break in an 80 meter run. Unfortunately his mother wiped it up before we could record the pattern for posterity. The question is: is it repeatable? To which we can affirmatively answer: by any fifth grader.
     
    K9KXW and WB5WPA like this.
  5. WB5WPA

    WB5WPA Ham Member QRZ Page

    ... oft referred to as a "Reduction in Force" (RIF)?
     
    Last edited: Jan 27, 2019
  6. K7DIP

    K7DIP Ham Member QRZ Page

    That may all be well and true, but I think the Dillon-Waggoner Graviton Polarity Generator achieved similar results without resorting to hydrocoptic marzel vanes.

    upload_2019-1-27_13-27-40.png
     
  7. K0RGR

    K0RGR XML Subscriber QRZ Page

    If you combine anti-inductance with anti-capacitance, you get anti-resonance, a condition where all energy applied is immediately dissipated at the anti-resonant frequency.
     
    WA2LXB likes this.
  8. AF7TS

    AF7TS Ham Member QRZ Page

    I understand that a 'negative capacitor' would break physics in roughly the same way as a 'negative resistor', and thus is a great source of jokes.

    In a nutshell, if you had a 'negative capacitor' with a small charge on it, you could connect it to a resistor, and the current through the resistor would _increase_ the voltage on the capacitor. A negative resistor would have a negative resistance, and thus supply power rather than consuming power.

    However I think that the original post is about some real news, not an April 1 gag.

    In the same way that negative _incremental_ resistance is possible, it is possible to have parts of larger systems that look like negative capacitance.

    I don't think we are looking at breaking physics here and getting negative energy for our warp drive; I think we are looking at microscale manipulation of electric fields for things like transistor gates.

    73
    Jon
    AF7TS
     
    AF4RK likes this.
  9. ZL1RD

    ZL1RD Ham Member QRZ Page

    Wait a minute... Did I lose a whole month.... is it April already?????
     
  10. AF4RK

    AF4RK Ham Member QRZ Page

    Not, it's not April. Look at the publication. Nature, the international journal of science. It's not QST!
    AF4RK
     

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