Search Results - "Bergmann, J. R."

Shaped Omnidirectional Reflector Fed by a Dielectric Lens Associated with a Coaxial Feed Horn by Bergmann, J. R., Patinos, L. S.

“…The paper explores an omnidirectional antenna configuration composed of a reflector fed by a shaped dielectric lens associated with a coaxial TEM horn. A…”
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GO Shaping of Omnidirectional Dual-Reflector Antennas for a Prescribed Equi-Phase Aperture Field Distribution by da Silva Moreira, F.J., Prata, A., Bergmann, J.R.

“…A formulation is presented for shaping dual-reflector antennas designed to offer an omnidirectional coverage. The shaping procedure is based on geometrical…”
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Dual-offset antennas with a spherical main reflector for small earth stations by Bergmann, J.R., da Costa, J.C.A.W.

“…The design of dual-reflector antennas with a spherical main reflector for small earth stations is considered. An analysis of the field polarization throughout…”
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Comparison between implementations of two global surface representations for the optimization of a reflector antenna synthesis by Bergmann, J. R., Hasselmann, F. J. V.

“…The implementation of two global surface descriptions in the physical‐optics synthesis of shaped reflector antennas is compared with a view toward reducing the…”
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New anisotropic cylindrical waveguide structure by Senhorini, K C C O, Bergmann, J R, Descardeci, J R

“…In this paper, the boundary condition characteristic equation of the anisotropic-dielectric-loaded corrugated guide is developed. This complex guide has…”
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A comparison between techniques for global surface interpolation in shaped reflector analysis by Bergmann, J.R., Hasselmann, F.J.V., Teixeira, F.L., Rego, C.G.

“…Usual geometrical optics based syntheses of shaped reflectors provide numerically defined surfaces which must be interpolated for subsequent evaluation of the…”
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On the design of broadband omnidirectional compact antennas by Bergmann, J. R.

“…The conventional discone antenna is well known as an easy‐to‐build broadband antenna with a vertically polarized omnidirectional radiation pattern. Here, we…”
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Axis-Displaced Dual-Reflector Antennas for Omnidirectional Coverage With Arbitrary Main-Beam Direction in the Elevation Plane by da Silva Moreira, F.J., Bergmann, J.R.

“…The synthesis of classical dual-reflector antennas suited to provide omnidirectional coverages with arbitrary main-beam direction in the elevation plane is…”
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Classical axis-displaced dual-reflector antennas for omnidirectional coverage by Fernando Jose da Silva Moreira, Bergmann, J.R.

“…The aim of this work is to discuss the synthesis and performance of classical dual-reflector antennas suited for an omnidirectional coverage. The reflector…”
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Anisotropic-dielectric-loaded corrugated guide by Senhorini, K.C.C.O., Descardeci, J.R., Bergmann, J.R.

“…In this paper, the boundary condition characteristic equation of the anisotropic-dielectric-loaded corrugated guide are developed. Dispersion curves of hybrid…”
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Shaped reflectors employing customized feeds: Novel designs for identical coverage at dual bands by Ghosh, S, Tao, Z C, Bergmann, J R, Yow, C Lee

“…Fixed coverage contour beam antennas for geo-stationary satellites can be obtained employing a shaped reflector illuminated by a single feed. Needless to…”
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Radiation pattern control by subreflector shaping in a dual-reflector antenna by Bergmann, J. R., Pereira, L. C. Palma

“…Dual‐shaped reflector antennas have applications in satellite communications systems in which the highest antenna gain and stringent specifications on…”
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Geometrical synthesis of offset reflector antennas using local axis-displaced quadric surfaces by Penchel, R. A., Bergmann, J. R., Moreira, F. J. S.

“…This work investigates an alternative numerical procedure for the geometrical synthesis of offset reflector antennas with an arbitrary radiation pattern in the…”
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Synthesis and analysis of omnidirectional dual-reflector antennas: Case of the main reflector with circular generatrix by Zang, S R, Bergmann, J R

“…The work considers the synthesis and analysis of dual reflector antennas designed to radiate omnidirectional radiation patterns. The reflectors are circularly…”
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Use of parabolic sections to shape the main reflector of omnidirectional dual-reflector antennas by Penchel, R. A., Zang, S. R., Bergmann, J. R., Moreira, F. J. S.

“…This work presents a formulation for shaping the main reflector of an axis-symmetric dual reflector antenna designed to offer an omnidirectional coverage with…”
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An omnidirectional dual-reflector antenna with a shaped main reflector described by local conic sections by Penchel, R A, Bergmann, J R, Moreira, F J S

“…This work investigates the synthesis of dual-reflector antennas for omnidirectional coverage. Both reflectors are bodies-of-revolution: the subreflector is…”
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Analysis of a coaxial horn antenna using FDTD bidimensional method by Barros, F. J. B., Silva, S. P., Fonseca, W. S., Zang, S. R., Bergmann, J. R.

“…In this work an analysis of a coaxial TEM horn with loaded dielectric coupling structure is proposed, which is excited by pulsed signal with short duration…”
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Synthesis and rigorous analysis of omnidirectional ADE antenna with shaped main reflector described by local conic sections by Penchel, R. A., Zang, S. R., Bergmann, J. R., Moreira, F. J. S.

“…This work investigates the synthesis and analysis of omnidirectional dual-reflector antennas. The body-of-revolution subreflector is generated by a single…”
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Design of omnidirectional dual reflector antenna: Case of the main reflector with circular generatrix by Zang, S. R., Bergmann, J. R.

“…This work considers the synthesis and analysis of dual reflector antennas designed to radiate omnirectional radiation patterns. The reflectors are circularly…”
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Analysis of a complex waveguide structure for microwave wideband low cross-polar aperture antenna by Senhorini, K C C O, Bergmann, J R, Descardeci, J R

“…In this paper, the boundary condition characteristic equation of the anisotropic-dielectric-loaded corrugated guide is developed. Dispersion curves of hybrid…”
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