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E - Bibliothèque et Archives Canada

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Fig. 4.1 1 : Magnitude

Fig. 4.1 1 : Magnitude of current density disiribut ion on the surface of a strip (w=O. 11. ) illuiiiitirited by a TMz plane wave incident at

4.3 STRlP SURFACE CURRENT USlNG THE MOMENT WETHOD 4.3.1 EFIE Fonnulrtion The incident eledric field on the strip (refer to fig . 3.8) illuminateci by a TMz plane wave is : EL&- - e iltp -b-d this field is tangent to the stnp sinœ it is the TMz case. The cunent induœd on the strip also has only a z component. The scattered field is produced by the current Jz on the strip. From equation (2.1 7) and at a certain point rn on the strip N If the current is represented by ap) i and we take gn to be a pulm fundion equal to unity on segment n and zero elsewhere. then equation 2.17 can be -en as: 4.3.2 Moment Method Formulation n=l Sin- pulse basis functions and point matching is used hem. equation 4.18 can be repeated far several points m. If mr subdivide the stnp into N segmmbr with width A = + and mt apply equation 4.18 on- to the mid point of each segment,

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