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E - Bibliothèque et Archives Canada

E - Bibliothèque et Archives Canada

From equations 2.31 and

From equations 2.31 and 2.33, Z,,,,, takes the fom of The terrn (4.20b) can be changed to be a numerical integraüon of the Hankel function over the segments and not only taking the average distance behween segment n and m. As it will be seen in the next section, even such an approximation will be lead to good results. It should be remembered that the scatteren dealt with hem are eledrically small and the nurnbar of segments is ielatively high and henœ the segment width is small. Sinœ equation (4.19) represents a set of N equations with N unknawns, and al1 Vm and &,,, con be cornputeâ, it ici possible to -Ive for al1 1. Once al1 the In are known, the current on the stnp is known. It must k remsmbamâ h-ver that this current repmsents the total aiment on the strip (upper and lower side). As shown in section 3.3.1, a sitnilar M o d could be useâ to get the top cunant and the bottorn cumnt from the total current:

4.3.3 Code and Rnults The cornputer code PSTRIP.FOR was madified to indude the TMz case. Figure 12.15 in [2] could also be reproduced exactty with PSTRIP. A number of plots were produœd to asses3 if the approximation in 4.20b is crude and wwtd require very fine slicing in segments. It was concludd that 4.20b is adequate for the cases dealt with hem. The resuits mm, plotted in seon 4.2 for cornparison with UTD plots.

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