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This paper presents system modeling of three different single band antennas using the singularity expansion method (SEM). To acquire the accurate physical complex poles and the corresponding residues of the narrow band antenna model, an enhanced Matrix Pencil (MP) method has been applied to the impulse response of the antennas. A delayed time parameter T is introduced to enhance the performance of the MP method to extract the actual physical poles and eliminate the nonphysical poles caused bydoi:10.1155/2017/7419179 fatcat:co6zu2pypvdrdpswovfxgt7gue