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Exploring the Beam Squint Effects on Reflectarray Perfromance: A Comprehensive Analysis of the Specular and Scattered Reflection of the Unit Cell
Abstract
In this article, the phenomena of beam deviation in reflectarray is discussed. The radiation pattern of the unit cell, which plays a vital role in shaping the beam of the reflectarray, is analyzed by considering undesired specular and scattered reflections. These unwanted reflections adversely affect the pattern of the single unit cell, thereby reducing the overall performance of the reflectarray. To conduct our investigations, three cases of reflectarray, i.e., (i) a center-fed with broadside beam (Case-I), (ii) a center-fed with the beam at 30∘ (Case-II), and (iii) off-center fed with the beam at 30∘ reciprocal to feed position with reference to the broadside direction (Case-III), are simulated. Different degrees of beam deviation are analyzed in each reflectarray by assessing the radiation pattern of a single element. The significance of specular reflections is further confirmed by half (left half and right half) aperture analysis of Case-II. This involves simulating the half-plane aperture illuminated by horn antenna, resulting in a distinct beam angle at the same frequency. Although the analysis specifically focuses on the three cases of the reflectarray, the proposed methodology is applicable to any type of reflectarray. The study presented in this work provides an important insight into the practical aspects of reflectarray operation, particularly in terms of quantifying undesirable effects that are normally overlooked in the design of this class of arrays. Moreover, this work holds significant potential for remote sensing satellite systems as beam deviation can adversely impact data collection accuracy and compromize observation precision, resulting in distorted images, reduced data quality, and overall hindrance to the system’s performance in capturing reliable information.
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Authors (4)
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Manzoor Elahi
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Amir Altaf
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- Publication version
- Accepted or Published Version
- DOI:
- Digital Object Identifier (open in new tab) 10.3390/s24051438
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- Category:
- Articles
- Type:
- artykuły w czasopismach
- Published in:
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SENSORS
no. 24,
ISSN: 1424-8220 - Language:
- English
- Publication year:
- 2024
- Bibliographic description:
- Elahi M., Altaf A., Kozieł S., Pietrenko-Dąbrowska A.: Exploring the Beam Squint Effects on Reflectarray Perfromance: A Comprehensive Analysis of the Specular and Scattered Reflection of the Unit Cell// SENSORS -Vol. 24,iss. 5 (2024), s.1-15
- DOI:
- Digital Object Identifier (open in new tab) 10.3390/s24051438
- Sources of funding:
-
- Free publication
- Verified by:
- Gdańsk University of Technology
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