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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Can I calculate minimum rise time of a transmission line if I know the length and the loss tangent?
Overview: I am trying to work out if it's possible to transmit my 1.2Gbps MIPI data down a 600mm long flexible PCB strip. Assuming I have the impedance correct, will the signal still be degraded by ...
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Dielectric strength test voltage
I am preparing an insulation diagram prior to testing a device against IEC 60601-1.
How do I determine the dielectric strength test voltage? I couldn't find anything in -1.
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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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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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How to extract complex permittivity from a CV measurement?
I can choose from the following measurements:
Z, theta (impedance and phase angle)
R + jX (resistance and reactance)
Cp-Gp (parallel capacitance and conductance)
Cs-Rs (series capacitance and ...
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Failure data of high-k dielectrics
How I can get access to failure data of high-k dielectrics caused by tunneling (trap generation)? I need a dataset for my research. (if someone could help me with the data, his/her name will be ...
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Hipot arcing for AC and DC hipot test
I have a substrate with multiple conductor traces (0.5mm gap from each other) with aluminum plate on top used as electrode. The aluminum plate is connected to the hipot "line" and the ...
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How to measure the electrical properties to ensure the performance of a thin electrode/insulator stack-up?
I am a mechanical engineer by trade, and I am looking at some basic electrical properties that I need to measure to ensure the device meets the desired performance.
The device consists of a two-layer ...
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Arc-shape frequency dependence of phase angle in bioimpedance spectroscopy
I have concerned myself with bioimpedance spectroscopy (BIS) from a medical standpoint for some time now, however there is one concept evading my grasp until now:
When measuring complex impedance of ...
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DC hipot leakage current
I noticed that when testing hipot in DC I always get leakage current, but not during AC hipot testing. Do you have any ideas about this? My hipot tester is Quadtech Sentry 500VA. I’m testing a ...
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Dielectric withstand test of DC powered product
I am trying to figure if our test set-up for dielectric withstand test is correct. There are two versions of the DUT (device under test), an AC powered (typical 85-264 Vrms) and DC powered type (12-...
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Ampere's Law with dielectric
I am asked to calculate the magnetic-field-strength and magnetic-flux-density for different regions inside a coaxial-cable. I found Ampere's Law for that, but it uses \$\mu_0\$ , and the coaxial-cable ...
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When is PCB thermal destruction desirable?
In the Wikipedia page for FR-4, it contains this excerpt:
FR-4 epoxy resin systems typically employ bromine, a halogen, to
facilitate flame-resistant properties in FR-4 glass epoxy laminates.
Some ...
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Does supercapacitor electrode need dielectric layer?
I am trying to build a super capacitor. I use Activated Carbon with Wood Glue, aluminium tin can as electrode, multi layers of tissue paper as separator, and table salt water as electrolyte.
No matter ...
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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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