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A Simple Model for Analyzing Transmitarray Lenses
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DOI：10.1109/MAP.2015.2414641.png)
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Abstract
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A new model for characterizing a complex system formed by a feeding horn and a transmitarray lens is presented in this paper. This model characterizes the spillover radiation and is capable of analyzing its effect on the radiation pattern. Both the contribution of the lens and the spillover radiation are modeled as planar arrays. The proposed model shows good agreement with the results obtained in simulations using a commercial full-wave software. In addition, some features, such as the characterization of the feeding element, are included in this model, in order to improve its accuracy. Finally, the limits of applicability are also discussed throughout this paper. Thus, it is possible to set up the boundaries, in terms of F/D ratio and number of elements, within which the model is reliable.
Keywords:
Lens
transmitarray (TA)
quasi-periodic surface
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