The study of the electromagnetic field distribution in a 20/0.4kV distribution transformer using the finite element method

This research presents a study of distribution of the electromagnetic fields in three-phase distribution transformer 200kVA-20/0.4kV through the conclusion of the governing electromagnetic equation and solve it using finite element method by FEMM4.2 program.

Equivalent Circuit Using in Microwave Filter Design

In this paper we will study the usage of equivalent circuit; in modeling a round shaped metal cylinder in rectangular waveguide to get filters that can be calibrated and used in the microwave domain. We will study the structure of a rectangular resonant cavity linked stimulatory through thick openings. Also a metal shape to be calibrated in rectangular resonant cavity linked stimulatory through thick openings. We will use matlab for showing transition and reflection factors for the suggested filters.