Array Pattern Reconfiguration Using Pixel Method
Keywords:
Beam steering, magnitude excitation, pattern configuration, pixel arrays, planar arraysAbstract
In this paper, the array elements are considered as pixels and their magnitude excitations are assigned to the values of 1 (i.e., active or turned ON) or 0 (i.e., inactive or turned OFF). Thus, each element either exists at its position in the considered array or not. The proposed pixel method can be applied to different planar array configurations such as square, rectangular, triangular, circular, or any other shape to achieve the required pattern reconfigurability. Moreover, by turning OFF some of the selected elements, the main beam of the array pattern can be switched to specify directions without using any phase shifters or any other RF components. Therefore, its practical implementation is simpler and cheaper than any other existing method. However, when comparing with arrays in which all their elements are turned ON, the gain of the considered arrays will be reduced when some selected elements are turned OFF. The array pattern reconfiguration using the pixel method has been designed and its parameters have been optimized using computer simulation Technology (CSTMWS), which uses the Finite Integration Technique (FIT). It’s also verified by High-Frequency Surface Structure (HFSS) commercial software (based on the FEM method). Numerical results obtained under fullwave modeling CST environment demonstrate the effectiveness of the described method.
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References
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