Reflectarray Antenna
Author:
- 15 April 2005
- book chapter
- Published by Wiley
Abstract
This article gives an overview of the development history and key design methodologies for the reflectarray antenna, in particular the printed reflectarray. A reflectarray is an array antenna similar to a parabolic reflector, but with its reflecting surface capable of being designed either flat or slightly curved. On the reflecting surface, there are many isolated (not physically combined by power division lines) antenna elements, which are illuminated by a feed antenna located at the vicinity of a focal point. These isolated elements are each predesigned with a particular electrical phase delay to compensate for the phase differences due to different pathlengths from the feed. The illuminating electrical field from the feed will then be scattered from these isolated elements and form a cophasal concentrated beam in the far‐field distance.Keywords
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