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# Finite Field

38 Threads found on edaboard.com: Finite Field

## regarding UWB antenna

Hi, first off all you need to understand the Radiation Boundary you use. The thing you want to simulate is the far field characteristics of your antenna in an infinitly large air box. As this cannot be designed you put the radiation boundary at the end of a finite airbox. This boundary is shall absorb all incoming waves but to work well it must be

## How could I visualize metal coupling in die layouts from EM simulation (ADS)?

Usually, simulation tools allow visualizing the fields that are simulated. For example, for capacitive coupling, electric field lines would tell where capacitance is coming from (in finite element or finite difference method based tools), or a surface charge density (in boundary element tools). Very often just viewing the (...)

## Adding material to the face of the substrate

You could also apply a "finite conductivity" boundary and set the properties to be that of copper.

## Total-field/scattered-field in finite-difference frequency-domain

We recently published a paper that describes a very simple and powerful technique for implementing total-field/scattered-field sources in the finite-difference frequency-domain method. The paper also serves as a brief tutorial of the method. The paper is open access and freely available:

## Design of HW/SW in distributed architectures

I am interesting in distributed hardware architectures. Especially: - what kind of software/hardware can be synthesized in a distributed manner - what are the current challenges in the field of synthesis of distributed systems Currently I am working on automatic synthesis of finite-state-machines working in rings. Let me know, if you wan

## A finite field multiplier generator for NAND flash ECC (free)

Hi, I've developped an online tool for generating a finite field multiplier with any primary polynomial. You can try it at .

## Problem of Scattering Field/Total Field tenique in FDTD

Why not begin with the simple point/line source? You might also want to read: 1) The finite difference time domain for electromagnetic by Kunz 2) Electromagnetic simulation using FDTD method by Dennis Sullivan

## Verilog code required for 128x32 bit Montgomery multiplier pls..

For AES alone, you dont need montgomery multiplication. for public key, you do need montgomery multiplication. You can understand the algorithm and code it yourself. I have a reference but its in VHDL finite-field Arithmetic Circuits Under chapter 3, see article 3.4.3

## Multiplicative inverse in finite field GF(28)

I am confused in calculating inverse in finite field Gf( 2^8 ) using extended euclidean method of (x6+x4+x+1)^-1mod (mod x8+x4+x3+x+1)

## Stuck: finite difference method, grid coarseness

Hello. I am trying to calculate the electrostatic field on a coupled microstrip enclosed withing a ground plane using finite difference method. the coupled microstrip rests on a 1mm thick dielectric, the rest is just air. The space where I compute the field is 5x5mm. 10V common mode is imposed on the coupled microstip. I wrote some (...)

## finite fields and generation of Primitive Polynamial

Hi, I finished my work on RS code for a long time. I think you know that the basic concept of RS code is based on finite field (so, primitive polynomial too). I remember that I did not generate primitive polynomials , but found them on the appendix of some textbooks. With selected primitive polynomial , i can use it to generate binary repre

## field distribution using 3D FDTD

See Allen Taflove's book. The name is Computational Electrodynamics: The finite-Difference Time-Domain Method. You can find it in www dot 4shared dot com

## divergence modeling - numeric divergence equal zero

Hi,people. My question is about finite difference modeling of EM fields. Exist some methods to force numeric divergence be zero, not changing too much the overall field picture? Like / dx + / dy + / dz = 0. Theoretically Maxwell equations maintain divergence st

## Toroidal shaped inductor cancel induced voltages

Yes. However, in an inhomogeneous field and with finite toroid diameter, the cancellation isn't complete.

## HFSS Filter Question -what ports, settings for finite array?

For a finite size you can use plane wave excitation but you will have to calculate the reflected power using field calculator yourself.

## absorbing condition in COMSOL

Hi all, I need to simulate an infinite (in the y direction) dielectric slab with finite width (in the x direction) in COMSOL and see the scattering field, but I do not know how to set the absorbing boundary condition at the edges of the slab. Does anyone know how to simulate infinite-length geometries in the 2D RF (...)

## Any formula to calculate electric field around the coil??

Generally the magnetic filed around a coild can be calculated by integrating the contribution of individual current elements according to Biot-Savarts law. There are also free tools as Quickfield Student Version that allow finite element analysis of simple coil geometries.

## Boundary Reflections on FDTD

In FDTD, the fields are known only at discrete points. Maxwell's equations are approximated using finite-differences which generates one equation for every field component at every point. These equations include field components at surrounding points. At the edge of your grid, you will be required to include a (...)

## What is FEFD method of EM-Field Simulations?

Just look for materials on the finite element method for electromagnetics. 99% of the material you will find is FEM is in the frequency-domain. Time-domain FEM is quite rare because it has some problems, but it certainly exists. -Tip

## Biot-Savart Law (infinite filament)

Because it is an infinite wire use the BS formulation of finite straight wire to the case of infinite wire. Here because the wire is along the x-axis, the x-ordinate (1) is of no importance, as any x-ordinate is identical w.r.t. infinite wire. The distance of the field point from the wire is R = (2^2 + (...)