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Semi-analytical calculation for sensitivities of the method of moments impedance and excitation matrices

✍ Scribed by Ezzeldin A. Soliman

Publisher
John Wiley and Sons
Year
2007
Tongue
English
Weight
264 KB
Volume
17
Category
Article
ISSN
1096-4290

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✦ Synopsis

A novel method is presented in this article for calculating the sensitivities of the impedance and excitation matrices of the method of moments. The proposed method evaluates the required derivatives with respect to a design variable semi-analytically. It is demonstrated that one matrices' fill is enough to achieve the required sensitivities. Two such fills would be necessary to obtain similar results using the conventional finite-difference approximation method. A microstrip patch antenna example is used to demonstrate the validity of the proposed method. By comparing its results with those obtained using finitedifference numerical approximation, a high degree of agreement is observed. The accuracy of the numerical approximation is found to be sensitive to the selected value of perturbation. V

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