An Efficient Numerical Solution Method for Reflectarrays of Varying Element Sizes


A novel technique is developed for the efficient solution of reflectarrays of variable size parts. The tactic depends on using characteristic modes (CM) as macro basis functions and reusing the dominant CM of the resonant part for all components in the reflectarray. This utilization ends up in getting a reduced matrix system where the number of unknowns is drastically decreased. As far as the way field is worried, correct results are achieved even with a single CM. The accuracy is attained thanks to preservation of mutual coupling info via the first technique of moments (MoM) impedance matrix. The answer is additional accelerated by tabulating the entries of the reduced matrix as a operate of interacting patch sizes and their relative displacements. It's observed that for sufficiently separated patches, the reduced matrix entry is nearly a separable function of the two-dimensional (two-D) displacement between patches and patch sizes related to the matrix entry. Tabulation is efficiently performed by exploiting this truth. Achieved acceleration is sufficient to use this analysis method in the design of reflectarrays. For a one thousand-element array, the tabulation process takes twenty eight min on a platform with three.three GHz CPU clock speed. With the lookup table at hand, the solution time is 0.38 s that is vital for the design iterations.

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