2009•IET Microwaves Antennas & PropagationRequires access

Omnidirectional ADE antenna with a GO-shaped main reflector for an arbitrary far-field pattern in the elevation plane

J.R. Bergmann, Fernando J. S. Moreira

Abstract

This work presents a formulation for shaping the main reflector of a dual-reflector antenna designed to offer an omnidirectional coverage with an arbitrary radiation pattern in the vertical plane. The subreflector is generated by an axis-displaced ellipse and the main reflector is shaped to achieve a prescribed far-field radiation pattern. The shaping procedure is based on geometrical optics (GO) principles. Two distinct far-field ray structures are investigated. The GO-shaping results are validated by an analysis using the accurate method of moments technique.

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Available abstract

Key concepts: Omnidirectional antenna, Reflector (photography), Radiation pattern, Optics, Ellipse, Elevation (ballistics), Periscope antenna, Near and far field