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73 Threads found on Field Region
The n region already has alot of electrons so i dont see the reason......If a photon frees an e- from p region, cant they just go out from that side? Is it because of the electric field from the depletion layer? But the depletion layer isnt throughout the whole length right, so what drives them? also, If a photon frees an e- n (...)
An application field where you often find liquid cooling is motor inverters for electric cars. I see it also in multiple 100 kW power inverters, but it's not necessarily.
finally i conclude that when multiplication is happened that electric field is high,and in this region is true this point.
RCS is an electromagnetic signature of a scatterer, and is the acronym for radar cross section.. Provided an EM wave hits a scatterer (an obstacle), it induces currents on the scatterer which then is a source of scattered fields.. This scattered field in far field region as a function of azimuth and elevation angles theta (...)
Concentric guardrings are common in ESD related circuitry (pad cells etc.). One useful function is that the built-in depletion region is a "getter" for loose minority carriers in the substrate. The ring can also kill lateral BJTs' base ohmically and deterministically if it is closed / pervasive, fight field oxide inversion / charging and so on.
I am trying to implement my own 3D FDTD based on Taflove's book, however I'm running into trouble with my TF/SF implementation. I am attempting to model free space, with no scatterers, yet I am getting significant fields outside the Total field region. I am modelling a 10 GHz sine wave with a deltax of 0.002. I don't expect you to (...)
Hi narayani, For simple static charges, there is no propagation, and the above definitions don't really apply (lambda -> infinity). Therefore, we typically say that there is no far-field region, and everything behaves like the near field.
Hi all I define a sphere in CST MWS and a plane wave as excitation.I want to calculate the backscattered field at different position, from nearfield region to farfield. We expect that when we approach to farfield region, the backscattered field converged to a specific value (...)
Hi all I want to calculate the the scattered E-field in FEKO. I define the Nearfield request at distances from r_0 to r_m which really some of them are in Farfield range. when the sample closed to Farfield region the scattered E-fields converge to 1. I test it for other structure and see (...)
My question is about drift and diffusion a semiconductor diode no "bias" condition diffusion is present and due to transfer of charges due to diffusion depletion region created and then this region has ions which produce electric field which results in drift current due to force the minority charges from both the the diffusion c
In reactive near field the electric and magnetic fields are not orthogonal and any object placed in this region will distort the antenna pattern. This is one clue that could give information where this field stops when moving far from the antenna. For doing this, have to do a far-field antenna pattern (...)
Think of the battery as providing potential energy (electric field) rather than kinetic energy (electrons flow). When a depletion region is created due to the diffusion of electrons and holes across the PN junction, the depletion region becomes an insulator across which there is no motion of any carriers (holes or electrons). So the (...)
Gate oxide breakdown voltage depends only on the thickness of the gate oxide (and on its quality). It doesn't depend on the direction of the electric field, just the absolute sum of voltages is decisive.
If we want to sample a light field (visual scene) by distributing cameras around the light field and each camera sample the region it captures of the light field from its point of view and reconstruct the sampled region of light field for each camera to get a virtual image of the (...)
Dear all, I am planning to simulate, and in a single setup, an FSS-Antenna system. I need to study the effect of different field patterns of a source antenna on the performance of an FSS structure. The simulation scenario has the following givens: 1- An antenna, in both the radiative-near-field (Fresnel region) and (...)
Hello. Welcome to If you keep increasing your forward bias voltage then depletion region become very thin that no electric field will be there any more so no resistance. I am obviously not an expert but I can try to help you because in this semester, I have semiconductor physics course. Regards, Princess
Are the responses of HFSS simulations in Terahertz region valid or not? In the last issue of IEEE Transactions on Terahertz Science and Technology, there was an extensive paper on the use of HFSS and CST MWS at THz frequencies, and the related issues and limitations. I am not working in this field myself, but the paper
Hello, I've managed to develop a FDTD code, in cylindrical coordinates, for studying mode propagation in a cylindrical waveguide. I have to cite that there is no PML region attached yet, so the waveguide is treated as a cylindrical cavity. At z=0 I explicitly set a certain waveguide field distribution, for the Electric field components (...)
Hi, I have a design consisting of a transmitter and a receiver separated by 1 meter and wanted to ask if anyone knows how to plot the E/H field in the region between them or the near field? Thanks
you should avoid near-field region