Abstract: In order to research the vibration control ofweak-coupling antenna structures in satellite, a simplified dynamicsstructure model is established in the present study. The vibration modeslocalization in the structures is investigated. Active vibration control ofthe structures is studied by applying predictive control method and LinearQuadratic Regulator (LQR) control method, respectively. The simulationresults show that small disorder of the weak-coupling antenna structures caninduce remarkable localization of vibration modes. The vibration controleffects predicted with the present method are superior to those with LQRmethod. The results also show that the predictive control method has perfectperformance in vibration control analysis while the models are mismatcheddue to the structure disorder. Therefore, the disorder must be consideredseriously in active vibration control of weak coupling antenna structures.