Near Field Characterization of an Imaging System Based on a Frequency Scanning Antenna Array
Near Field Characterization of an Imaging System Based on a Frequency Scanning Antenna Array
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DOI：
10.1109/tap.2013.2244834
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发表时间：
2013-02
影响因子：
5.7
通讯作者：
C. Vázquez;Cebrian Garcia;Y. Alvarez;S. Ver-Hoeye;F. Las-Heras
中科院分区：
文献类型：
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作者：
C. Vázquez;Cebrian Garcia;Y. Alvarez;S. Ver-Hoeye;F. Las-Heras
这个贡献描述了成像应用的频率扫描的概念。所设计的频率扫描天线阵列工作在Ku频段，用于调查现场的局部照明，使限于选定区域的信息得以恢复。虽然与机械或电控扫描系统相比，所提出的想法简化了波束扫描技术，但代价是散射场信息的数量受到限制。通过等效源模型对频率扫描天线阵列的近场辐射进行表征，以准确评估成像算法中使用的入射场。该分析还可以评估天线在近场的频率转向性能，验证其在拟议应用中的使用。
This contribution describes the concept of frequency scanning for imaging applications. The designed frequency scanning antenna array, which works in Ku frequency band, is used for the sectoral illumination of the scene under investigation, enabling the recovery of information restricted to the selected area. While the proposed idea simplifies beam scanning techniques with respect to mechanical or electrically-controlled scanning systems, the price-to-pay is the limitation on the amount of scattered field information. The near field radiation of the frequency scanning antenna array is characterized through an equivalent source model to assess accurately the incident field used in the imaging algorithm. This analysis also enables the evaluation of the frequency steering performance of the antenna in the near field, validating its use for the proposed application.