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Equivalent circuits are proposed to model the radiation impedance of low-profile ultrawideband antenna arrays with strong interelement coupling. Previous approaches provided rudimentary equivalent circuits and referred to much smaller impedance bandwidth arrays. In this letter, we extend these models to include antenna sections that overlap with adjacent array elements (as is the case with interwoven...
In this paper, we present a novel, planar, circularly polarized (CP) Interweaved Spiral Array (ISPA) having a 10:1 bandwidth while operating conformally on a PEC ground plane. The design is based on Wheeler's concept and is comprised of rectangular, self-complementary spiral elements.
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