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Notched radiating ground plane analyzed from a modal perspective

Abstract:

In this paper different configurations of notch antennas on finite ground plane are going to be analyzed from a modal point of view. The filtering effect due to the interaction between the resonances of the notch and the ground plane is going to be explained with the information provided by the current distribution of characteristic modes, and their associated eigenvalues. Using a doubly notched radiating ground plane with two excitation ports, the undesired filtering effect is reduced, and the antenna matching is improved.