The Synthesis of Patterns using a Series-Fed Array of Annular Sector Radiating Line (ANSERLIN) Elements: Low-Profile, Circularly Polarized Radiators

James L. Drewniak, Missouri University of Science and Technology
P. E. Mayes

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A series-fed, circularly polarized array of annular sector radiating-line elements that operates over a ground plane and has a low profile is presented. Pattern shaping can be achieved through control of the fraction of the incident power that is radiated by each element. This can be accomplished over a wide range by a simple adjustment in the geometry of each element. A synthesis technique is given, and experimental results are presented. The array is demonstrated to have a high return loss (good impedance match) and a low axial ratio