# 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. ### KA0HCPXML SubscriberQRZ Page

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

2. ### W1YWHam MemberQRZ Page

I have a forward bias!

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3. ### KW0UHam MemberQRZ Page

Been using it in a flux capacitor for years.

4. ### KI7SSHam MemberQRZ 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.

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5. ### WB5WPAHam MemberQRZ Page

... oft referred to as a "Reduction in Force" (RIF)?

Last edited: Jan 27, 2019
6. ### K7DIPHam MemberQRZ 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.

7. ### K0RGRXML SubscriberQRZ 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. ### AF7TSHam MemberQRZ 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. ### ZL1RDHam MemberQRZ Page

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

10. ### AF4RKHam MemberQRZ Page

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