Microstrip reflectarray antennas for use in satellite communications

摘要

The reflectarray antenna is an n/spl times microstrip patch element planar array, which reflects the incident fields radiating from a feed antenna. Each patch element introduces a phase change to the scattered fields. In this paper, at first it is determined the phases, which should be created by patches for radiation in a desired direction. These phases are implemented by varying both the size of patches and the length of attached stubs. Finally, the shapes of open-ended microstrip stubs are optimized to improve the bandwidth characteristics of antenna.