Application of EBG Structures at Sub-Array Level
other
Low efficiency and pattern degradation are specific problems encountered in phased array designs based on integrated technology, as for example used in lowprofile radar applications. These problems are largely due to the excitation of surface waves (SW). It was demonstrated in earlier work that Electromagnetic Band Gap (EBG) technology can decrease or even eliminate SWs. However, for the most effective application, the EBG should preferably fully enclose the individual elements that compose the array. This inherently creates a problem of spacing, in the sense that scanning becomes more limited or virtually impossible. A solution to the problem could be found in the application of the EBG at sub-array level. In this contribution we investigate the effect of this concept in terms of directivity, radiation-pattern purity and scattering parameters. Commercial software was used to study various sub-array concepts with the application of EBGs to limit SWs. Two hardware demonstrator array panels were produced and experimentally tested for validation purposes. © 2006 EuMA.
Topics
TNO Identifier
223073
Publisher
EuMA
Source title
Proceedings of the 36th European Microwave Conference, EuMC 2006, 10-15 September 2006, Manchester, UK
Place of publication
Louvain-la-Neuve
Pages
1052-1055