Questions tagged [dielectric]
A dielectric is an insulator that can be polarized by applying an electric field. A common example is the use of a dielectric within a capacitor between the metallic plates to increase the surface charge.
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What are the "poles" of a signal (after it's reflected perhaps)
I desire to learn about "estimating the poles of a resonant signal", specifically the complex natural resonance of objects.
However, I don't know what "poles" are. What would you suggest I look up ...
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HF characteristics of Liquid Electrical Tape
Some self-wound toroid inductors from a HF-radio kit are sitting a bit too loose on their PCB for my liking; they stand upright and are only held in place by the thin enamel-coated inductor wire that ...
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How can the dielectric constant of water be so high but water on electric devices can cause a short circuit? [closed]
Is it only the fact that pure water has a high dielectric constant and non-pure water i.e. the water that usually causes a short circuit is contaminated and it's the contamination mixture in the water ...
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C0G vs polypropylene capacitors in signal filtering
Can anybody give me a comprehensive pros and cons list or explanation about the differences between C0G (NP0) ceramic and polypropylene capacitors?
I would like to use them in signal filtering and ...
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Grounding polycarbonate or Plexiglas
If a record turntable's base is made from a 2" think piece of acrylic (for instance polycarbonate or Plexiglas) can it be successfully grounded to eliminate any static charge that it would build up in ...
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termination of a parallel wire differential transmission line as delay line on variable dielectric constant medium
Well this has quite a long title, lets explain the situation
I'm currently working on the design of a sensor to measure the dielectric permittivity of a liquid medium, the idea is to use a ring ...
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PEC-backed dielectric material
For the paper named "Antenna Miniaturization and Bandwidth Enhancement Using a Reactive Impedance Substrate" the statement "PEC-backed dielectric material", so what is the meaning of this statement? ...
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High voltage dielectric breakdown & layering insulators
I’m going to use 230 kV as the reference voltage for the example below;
I know if I put a piece of metal too close to a 230 kV source it will breakdown the air and jump to the piece of metal causing a ...
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Capacitance of circular parallel plate capacitors
I've been trying to solve this question for a while now , but I can't seem to get to the written solution.
Question : Calculate the capacitance of a parallel capacitor having two identical conductor ...
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Dielectric Loss for Constant Impedance
Are dielectric losses the same for two different 50ohm structures that are built in the same dielectric medium?
Eg. Two 50ohm Stripline traces in FR4 where one is very skinny with close GND planes, ...
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What would be the combined dielectric constant of two dielectrics in series?
Let's say we have two parallel conductor plates. In the middle, there is not one but two layers of dielectrics made of different materials. If we know the relative permittivity of each dielectric, how ...
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What lubricant is suitable for switch contact?
I have this expensive DPDT switch (20A 250V 2hp) which the only problem is dirty encumbered inside. The encumbrance is made of carbonized material and some kind of wax and dirty electrical contacts. ...
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variation of thickness of dielectric layer for different textile-based capacitive pressure sensors
For my thesis I am working with textile-based capacitive pressure sensors and I am struggling to see how much variation in thickness of the dielectric layer you can have before you have noticeable ...
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How far does reforming a capacitor help? Does it have any adverse effect on using such a capacitor on components?
I read a few articles on the internet about reforming capacitors. Does this actually apply only to a capacitor that was stored during a certain period of time or can it be used on any electrolytic ...
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Coaxial cable: how is it possible to define a conductance?
I have a coaxial cable with internal conductor of radius r1 and external conductor of radii r2 and r3. The material of the conductors has a conductivity \$\sigma_1\$. Between the conductors there is a ...
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