Bandwidth of reflectarrays |
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Authors: | Pozar D.M. |
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Affiliation: | Dept. of Electr. & Comput. Eng., Massachusetts Univ., Amherst, MA, USA; |
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Abstract: | It is shown that the dominant factor controlling reflectarray bandwidth is the bandwidth of the radiating element, and that the effect of non-constant path delays over the surface of the flat reflector has little significance unless the aperture is electrically very large and the f/D ratio is small. An example of a polarisation-twist reflectarray using aperture coupled elements with time delay lines is used to demonstrate this conclusion. |
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