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Reflectarray antennas can be considered as quasi-periodic structures in which similar elements locate on periodic grids. In this paper, we compare the reflection phase of elements in the array between the designed value and the practical one. This error is mainly due to the assumption of periodicity in computing the designed element reflection phase. To study this error, we developed a method to obtain...
In this letter, a W-band multipolarized monopulse Cassegrain antenna is proposed, in which a phased dual-polarized microstrip patch quad is employed to feed the hyperbolic subreflector. Due to the more even polarization distribution on the aperture of the quad, the high aperture efficiency of the Cassegrain antenna is achieved. Simulation results verify that the microstrip patch quad is qualified...
A beam-scanning reflectarray antenna with an offset mechanically rotational horn is presented in this paper. Bifocal design method is employed to reduce the phase error caused by the rotational horn and the offset-feed structure is utilized to minimize the feed blockage effect on the broadside beams. The simulation results show that good scanning performance can be achieved with aperture efficiency...
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