Digital Reflectarray Considerations for Terrestrial Millimeter-Wave Imaging

We investigate how realistic architecture considerations affect the performance of wafer-scale electronically scanned millimeter-wave reflectarrays. Considering the application of a confocal Gregorian optics geometry with a small angular field of view, we examine how a reflectarray's discrete (...

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Bibliographic Details
Published in:IEEE antennas and wireless propagation letters 2012, Vol.11, p.272-275
Main Authors: Dietlein, C. R., Hedden, A. S., Wikner, D. A.
Format: Article
Language:English
Subjects:
Arrays
Imaging
millimeter-wave
Optics
Phase shifters
Quantization
Radar imaging
reflectarray
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Summary:We investigate how realistic architecture considerations affect the performance of wafer-scale electronically scanned millimeter-wave reflectarrays. Considering the application of a confocal Gregorian optics geometry with a small angular field of view, we examine how a reflectarray's discrete (digital) phase state quantization and electrical size impact scan angle accuracy and quantization lobe performance degradation. We quantify the impact of these effects on the camera's imaging performance and show that, for these reflectarrays, phase quantization of 2 bits is sufficient.
ISSN:1536-1225
1548-5757
DOI:10.1109/LAWP.2012.2189545