Axial ratio reduced ultra wideband slot spiral on hybrid impedance surfaces

Zheyu Wang, Konstantinos Karathanasis and John L. Volakis

Journal of Electromagnetic Waves and Applications, 2015, vol. 29, issue 2, 143-153

Abstract: This paper presents a low-profile ultra wideband slot spiral antenna backed by a hybrid impedance surface. A unique aspect of the spiral is its hybrid impedance surface cavity leading to reduced axial ratio over a wide bandwidth. This is an improvement over conventional cavity-backed wideband spirals. Measurements demonstrated that the slot spiral on the proposed hybrid impedance surface achieved a 10:1 bandwidth from 0.6 to 6 GHz with an axial ratio of

Date: 2015
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DOI: 10.1080/09205071.2014.981035

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