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J Electromagn Eng Sci > Volume 9(1); 2009 > Article
Journal of the Korean Institute of Electromagnetic and Science 2009;9(1):1-6.
DOI: https://doi.org/10.5515/JKIEES.2009.9.1.001   
An Effective Method for Suppressing Second-Order Beams of 2D Edge Slot Phased Arrays
Jong-Kuk Park1, Hyung-Gi Na1, Chan-Hong Kim2, Dong-Kook Lee2
1LIG Nexl RF&Microwave Research Center
2Agency for Defense Development
Abstract
An effective method is proposed to suppress the second-order beams(SOBs) that result from the cross-polarized fields of 2D edge slot arrays. By rearranging the conventional sequence of stacking waveguides, the SOBs are shown to be considerably reduced and the 9 dB suppression is obtained. The optimal sequence is obtained from the genetic and exhaustive searches and its effects are verified using near-field measurements as well as theoretical estimation. Since the proposed method requires no additional polarizing structures such as baffles, it is very easy and cost-effective to implement.
Key words: Edge Slot Phased Array, Second-Order Beam(SOB), Genetic Algorithm
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