engleski

Investigation of Stability of Negative Impedances for Use in Active Metamaterials and Antennas

During the last years a lot of attempts to use negative non-Foster impedances to improve the bandwidth of electrically small antennas (ESAs) or the bandwidth of metamaterial structures have been realized. Unfortunately, negative non- Foster impedances are not absolutely stable circuits which could be a serious problem in practical applications. In this paper, we study the stability of negative impedances in several circuits that model realistic situations.

metamaterial; negative capacitor; NIC

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