Axis-Displaced Dual-Reflector Antennas for Omnidirectional Coverage With Arbitrary Main-Beam Direction in the Elevation Plane

• Published in: IEEE transactions on antennas and propagation Vol. 54; no. 10; pp. 2854 - 2861
• Main Authors: da Silva Moreira, F.J., Bergmann, J.R.
• Format: Journal Article
• Language: English
• Published: New York, NY IEEE 01.10.2006; Institute of Electrical and Electronics Engineers; The Institute of Electrical and Electronics Engineers, Inc. (IEEE)
• Subjects: Antennas; Aperture antennas; Applied sciences; Axis-displaced reflector antennas; Azimuthal plane; Costs; Directive antennas; Elevation; Emission; Exact sciences and technology; Exact solutions; Feeds; Frequency; Interference; Mathematical analysis; Millimeter wave communication; Millimeter wave technology; omnidirectional antennas; Planes; Radiocommunications; Reflector antennas; Reflectors; Synthesis; Telecommunications; Telecommunications and information theory; reflector antennas; Non directive antenna; Moment method; Reflector; Geometrical optics; Closed form equation; Reflector antenna; Case study; Axis-displaced reflector antennas; Dual reflector antenna; Field distribution; omnidirectional antennas; Conical shape
• ISSN: 0018-926X; 1558-2221
• DOI: 10.1109/TAP.2006.882181

The synthesis of classical dual-reflector antennas suited to provide omnidirectional coverages with arbitrary main-beam direction in the elevation plane is discussed. Both sub- and main reflectors are bodies of revolution generated by axis-displaced conic sections, so to transform a spherical radiation emanating from the antenna principal focus (at the symmetry axis) into an equiphase field distribution over a conical aperture. Closed-form design equations are presented for the geometric-optics synthesis of all possible configurations. Several case studies are investigated and analyzed by the accurate method of moments technique in order to validate the proposed design procedure