Page 1. JM Rodríguez, Hristo D. Hristov and Walter Grote Departamento de Electrónica Universidad ... more Page 1. JM Rodríguez, Hristo D. Hristov and Walter Grote Departamento de Electrónica Universidad Técnica Federico Santa María Valparaíso, Chile hristo.hristov@usm.cl Abstract—A number of lens antennas with single-dielectric ...
A number of lens antennas with single-dielectric phase-correcting Fresnel zone plate (FZP) lenses... more A number of lens antennas with single-dielectric phase-correcting Fresnel zone plate (FZP) lenses have been designed and studied numerically at microwave and terahertz frequencies, and contrasted to a similar in size and parameters ordinary refractive lens antenna. In a confined frequency band the terahertz grooved-dielectric FZP lenses/antennas with four or more phase-correction steps have gain, beamwidth, cross-polar isolation and input-mismatch comparable to those of the corresponding ordinary lens antenna. An examined 1.5-THz FZP lens antenna designed according to the here-proposed correction in FZP design equation can prevail in gain the ordinary lens antenna, but this finding is not valid for the examined 38-GHz (microwave) FZP lens antenna. Thus, the terahertz FZP lenses are thinner, lighter and effective options to the similar in diameter, focal length and building material ordinary lens for lens antennas construction.
Third International Conference on Systems (icons 2008), 2008
By sharing the protection bandwidth of high- priority connections (HPC) with the bandwidth of low... more By sharing the protection bandwidth of high- priority connections (HPC) with the bandwidth of low- priority (LPC) ones, NetFailPAC (network failure protection algorithm with class of service) establishes working (HPC and LPC) and protection routes (for HPC only) in a WDM network. By using bandwidth as the main metric to select the working and backup paths, it outperforms previous proposals increasing high-priority connection setup capabilities from 0% to 50% without additional infrastructure, while maintaining similar network performance.
Page 1. JM Rodríguez, Hristo D. Hristov and Walter Grote Departamento de Electrónica Universidad ... more Page 1. JM Rodríguez, Hristo D. Hristov and Walter Grote Departamento de Electrónica Universidad Técnica Federico Santa María Valparaíso, Chile hristo.hristov@usm.cl Abstract—A number of lens antennas with single-dielectric ...
A number of lens antennas with single-dielectric phase-correcting Fresnel zone plate (FZP) lenses... more A number of lens antennas with single-dielectric phase-correcting Fresnel zone plate (FZP) lenses have been designed and studied numerically at microwave and terahertz frequencies, and contrasted to a similar in size and parameters ordinary refractive lens antenna. In a confined frequency band the terahertz grooved-dielectric FZP lenses/antennas with four or more phase-correction steps have gain, beamwidth, cross-polar isolation and input-mismatch comparable to those of the corresponding ordinary lens antenna. An examined 1.5-THz FZP lens antenna designed according to the here-proposed correction in FZP design equation can prevail in gain the ordinary lens antenna, but this finding is not valid for the examined 38-GHz (microwave) FZP lens antenna. Thus, the terahertz FZP lenses are thinner, lighter and effective options to the similar in diameter, focal length and building material ordinary lens for lens antennas construction.
Third International Conference on Systems (icons 2008), 2008
By sharing the protection bandwidth of high- priority connections (HPC) with the bandwidth of low... more By sharing the protection bandwidth of high- priority connections (HPC) with the bandwidth of low- priority (LPC) ones, NetFailPAC (network failure protection algorithm with class of service) establishes working (HPC and LPC) and protection routes (for HPC only) in a WDM network. By using bandwidth as the main metric to select the working and backup paths, it outperforms previous proposals increasing high-priority connection setup capabilities from 0% to 50% without additional infrastructure, while maintaining similar network performance.
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