Accuracy of Floquet Model in Predicting Performances of Finite Arrays

This letter studies the accuracy of the Floquet model for finite array analysis. The Floquet model and the Plane Wave Spectum model are compared for open-ended waveguide arrays. The numerical results indicate that for arrays larger than 2 wavelengths, the Floquet model can predict the performance accurately. The Floquet model was found to also compare well to finite element analysis in the case of a small patch array.