Effect of air-gap on axial ratio of low profile spiral antenna

Authors :: Ali M. Mehrabani
Lotfollah Shafai
Source :: Microwave and Optical Technology Letters. 53:2422-2423
Publication Year :: 2011
Publisher :: Wiley, 2011.
Abstract: A low-profile offset-fed spiral antenna over an artificial magnetic conductors (AMC) ground plane is studied in which the AMC ground plane has a two-layer structure with an air-gap present between the layers.The effect of such air gaps on the axial ratios of the antenna is investigated. The predicted numerical results are verified by testing a prototype sample of the proposed antenna showing a satisfactorily agreement between them. © 2011 Wiley Periodicals, Inc. Microwave Opt Technol Lett 53:2422–2423, 2011; View this article online at wileyonlinelibrary.com. DOI 10.1002/mop.26248