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Applied Wave Research, Inc. 1960 East Grand Avenue Suite 430 El Segundo, CA 90245 www.mwoffice.com...

Cell Size Definition in Microwave Office Design Suite's EMSight...

Cell size definition is an important part of an electromagnetic (EM) analysis. EMSightTM, the electromagnetic simulator in Microwave OfficeTM design suite from Applied Wave Research (AWRTM), is a unique software tool that efficiently and easily solves this challenge. EMSight, which is used to simulate and analyze the behavior of high-frequency RF and microwave circuits and antennas, can analyze arbitrary planar circuits, including interconnecting vias, on an unlimited number of dielectric layers with an unlimited number of ports. The software accurately determines the multi-port scattering parameters and features robust 3D visualization and animation capabilities that show the magnitude and direction of currents within a structure. Many times it is a matter of experience and intuition that determines cell sizes for experienced EM users. Many of these users have a good understanding of the physical properties of the structure they want to analyze. They know the effect of dimensional tolerances on the structure at the analysis frequencies because they have built and tested similar structures. For the novice EMSight user proper cell size definition can be very ambiguous. In this paper proper cell size is defined as a cell size that creates a sufficient mesh density for the accuracy of the simulation for a particular structure. Each structure is different, and, accordingly, the required accuracy for the solution varies. Guidelines in determining proper cell sizes will be discussed and examples will be given to illustrate each point. The discussion is divided into three main guidelines called FDS frequency, dimension, and structure....

Guidelines to Determine Proper Cell Size FDS...

There are many guidelines that determine the proper cell size for a structure. The most important of these guidelines can be divided into three categories frequency, dimension, and structure 1. Frequency - the cell dimension is inversely proportional to the analysis frequency. As frequency increases wavelength decreases and therefore the cell size shrinks. Typically the cell size is chosen to fit the highest frequency. This is the most important guideline because it is taken into consideration in all other guidelines. 2. Dimension - this guideline describes an understanding of how dimensional tolerances affect a structure ...

Document Keywords

IC Design (Taiwan), September 2004 content downloads ic design september 2004

About AWR CORPORATION

AWR is a National Instruments company. AWR high - frequency design software is used for RF, microwave and electromagnetic circuit design.

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