Computational Electromagnetics for RF and Microwave by David B. Davidson

By David B. Davidson

Many specialists who paintings on CEM are nice mathematicians and physicists. you will find the great thing about math and physics of their textbooks. but when you're an entrepreneur who desires to commence a enterprise in CEM, you need to learn Prof. Davidson's booklet earlier than misplaced on your desires. The booklet explains rather well why definite CEM tools are really appropriate for definite markets. As a practitioner, i locate the ebook in particular precious for selecting computational algorithms which are confirmed to paintings for business functions. It additionally teaches you ways to debug and validate CEM codes. All Prof. Davidson's commercial and advertisement views are not easy to discover in different CEM textbooks.

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In this context, an example is given of a perfectly matched layer. The three-dimensional FDTD method is briefly discussed, and examples of the use of a commercial three-dimensional code are presented. These two chapters form an integrated unit. The second part, Chapters 4–8, deals with the method of moments. Here, the five chapters largely alternate theoretical devolopment with practical application. Chapters 4 and 5 form a unit, first introducing MoM theory for thin-wire antennas, and then applying it using both a commercial and a public domain code.

Comparison with other CEM codes This is a relatively recent innovation, prompted both by the availability of powerful general-purpose codes and the difficulty of obtaining reliable measured data. Once again, caution is required. This is one place where the difference between validation and verification can be significant: to give an example, validating a thin-wire code by comparison to another thinwire code will not detect a fundamental problem with the thin-wire assumption. In general, this is most convincingly done by comparing results computed using codes implementing different formulations.

Hence this attractive scaling behavior only manifests itself for electromagnetically very large problems. The convergence of iterative methods is also very problem dependent, so a particular analysis may not yield the expected asymptotic behavior if the solver should converge unexpectedly slowly. ’s review paper [20]. We will discuss fast methods in Chapter 6. Whilst great advances have been made, the full-wave techniques eventually make impossible demands on even the largest supercomputers, and asymptotic techniques become important.

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