Field Pattern computation using 2 - D FFT for Microstrip Reflectarray Antenna

Namrata V. Langhnoja, Divyesh R. Keraliya, Balvant J. Makwana

Abstract


A Microstrip Reflectarray antenna as a planar array antenna is examined in this study effort. The basic original design requires that the phase of the field reflected from a Microstrip Reflectarray element be set so that the overall phase

delay from the feed to a fixed aperture plane in front of the Reflectarray is constant for all elements. The array factor and element pattern product are displayed in the overall electric field pattern expression. The arrangement of Microstrip Reflectarray antenna and feed has been placed in prime focal axis. Amplitude tapering is used to improve the main beam's field strength by lowering the side lobe levels. The comparative numerical analysis of computing field pattern normally as well as using 2-D FFT of n x n elements of the Microstrip reflectarray antenna is carried out using MATLAB codes. It is shown that MATLAB simulation time with FFT is much shorter than simulation time without FFT.


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References


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