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This paper presents the results of an eigenvalue and robustness analysis of a multi-DER islanded microgrid voltage control scheme. The configuration, parameters, and linear time-invariant (LTI) state-space model of the microgrid are provided. The control strategy, control parameters, and the LTI state-space model of the closed-loop system are also given. An eigenvalue analysis is performed to investigate the dynamic behavior of the study system as microgrid electrical parameters and control gains change. A robustness analysis of the control strategy using the notion of real stability radius is carried out and results are presented. A PSCAD/EMTDC simulation case study is carried out to verify the results of eigenvalue/robustness analysis.