Xunwang Dang

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Many electromagnetic devices can be modeled as quasi-periodic arrays such as reflectarray antennas, metasurfaces, and etc. These devices have similar array elements positioned on periodic grids. Compared with modeling of periodic arrays, efficient modeling of quasi-periodic arrays can be very challenging due to the loss of periodicity in the array. In this(More)
Many electromagnetic devices, such as metasurfaces, reflectarray antennas, nano particle arrays, can be modeled as quasi-periodic arrays. Simulation of electromagnetic wave interaction with such arrays are very challenging because they are usually large multi-scale models. In this work, we develop a fast algorithm to model quasi-periodic arrays. In this(More)
The reduced basis method is a model-order reduction technique that converts the original system equations into smaller ones using a reduced basis set. This basis set is usually derived from a set of solutions of the system equation with different values of control parameters. If the system model changes affinely with the parameter values, a reduced-order(More)
Planar quasi-periodic arrays are widely used in many electromagnetic devices such as metasurfaces, reflectarray antennas, nano particle arrays, etc. They comprise similar elements located on periodic grids. In this work, we compare the reflection phase of elements in the array between the designed value and the practical one. This difference is mainly(More)
The equivalence principle algorithm is a domain decomposition scheme based on integral equation formulation. One of the key building blocks in this algorithm is the equivalence principle operator that computes the scattered equivalent current on a virtual closed surfaces. In this abstract, we studied the numerical error of the inside-out procedure in the(More)
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