Abstract
AbstractThis paper presents the design of reflectarray antennas to radiate an optimum near‐field distribution by using the procedure of steepest decent method to synthesize the impressed phases of reflectarray elements. In particular, the closed‐form formulations used in the electromagnetic modeling were developed for an efficient design. The design was further implemented to realize a reflectarray of microstrip patch elements, which is illuminated by the radiation of a feed antenna at the 2.4 GHz band in the radio frequency identification applications. Numerical investigations as well as experimental measurements over a prototype are presented to validate the feasibility of the developed models and the implemented antenna structure.
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