Chapter 1. Overview of High-Frequency Electromagnetic Analysis

第一章.高频电磁概述

The ANSYS program supports high-frequency electromagnetic analysis. This type of analysis calculates the propagation properties of electromagnetic fields and waves in a given structure. The ANSYS program supports both time-harmonic and modal high-frequency analysis.

ANSYS程序支持高频电磁分析。这种类型的分析计算电磁的场和波在所给结构上的传播特性。ANSYS程序支持谐性和模态高频分析。

Except in a few cases, most-high-frequency devices use electromagnetic waves to carry information. For this reason, frequency plays a vital role in the design of such devices. High-frequency electromagnetic field analysis simulates the electromagnetic phenomena in a structure when the wavelength of the signal is of the same order of magnitude or smaller than the dimensions of the model. The high-frequency band ranges from hundreds of MHz to hundreds of GHz.

除了少数案例，绝大多数的高频装置使用电磁波去传送信息。正因为如此，在设计这样的装置上频率扮演了一个至关重要的角色。高频电磁场分析模拟信号的波长在量级上和模型结构的尺寸是同阶或更小的电磁现象。高频电磁的频带从几百MHZ到几百GHz。

In general, you use high-frequency electromagnetic field analysis to solve interior problems or exterior problems. For interior problems, an electromagnetic field propagates or oscillates in a closed structure such as an accelerator chamber, a microwave filter, or a high-speed electronic package. The oscillating frequencies and scattering matrix parameter (S-parameter) are usually investigated. For exterior problems, an electromagnetic wave radiates into open space or it is scattered by an object in the open domain. Examples are phased antenna arrays and radar reflection from a metallic object. The radiation pattern, directive gain, or radar cross section (RCS) is usually investigated.