The Experts below are selected from a list of 318 Experts worldwide ranked by ideXlab platform
Persimon Kildal - One of the best experts on this subject based on the ideXlab platform.
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analysis of an untilted wire excited slot in the narrow wall of a rectangular waveguide by including the actual External Structure
IEEE Transactions on Antennas and Propagation, 1997Co-Authors: Jiro Hirokawa, L Manholm, Persimon KildalAbstract:The admittance of an untilted slot in the narrow wall of a rectangular waveguide is calculated by including the actual External Structure. The slot is excited by two tilted thin wires inside the waveguide. The slot is also allowed to extend into the two broad walls of the waveguide to make it sufficiently long for resonance to occur. The External slot admittance is evaluated by using a spectrum of two-dimensional solutions, a method which can handle the arbitrary cross section of the External Structure, The analysis predicts that if both the slot and the wires are tuned to resonance, the transmission coefficient gets constant phase over a wide-frequency band. The results also show that resonance can be obtained for any slot length by adjusting the wire length, and this relation between the lengths is presented. The distance between the slot and the wires needed to maximize the radiated power is also shown; some results are confirmed by measurements.
Jiro Hirokawa - One of the best experts on this subject based on the ideXlab platform.
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analysis of an untilted wire excited slot in the narrow wall of a rectangular waveguide by including the actual External Structure
IEEE Transactions on Antennas and Propagation, 1997Co-Authors: Jiro Hirokawa, L Manholm, Persimon KildalAbstract:The admittance of an untilted slot in the narrow wall of a rectangular waveguide is calculated by including the actual External Structure. The slot is excited by two tilted thin wires inside the waveguide. The slot is also allowed to extend into the two broad walls of the waveguide to make it sufficiently long for resonance to occur. The External slot admittance is evaluated by using a spectrum of two-dimensional solutions, a method which can handle the arbitrary cross section of the External Structure, The analysis predicts that if both the slot and the wires are tuned to resonance, the transmission coefficient gets constant phase over a wide-frequency band. The results also show that resonance can be obtained for any slot length by adjusting the wire length, and this relation between the lengths is presented. The distance between the slot and the wires needed to maximize the radiated power is also shown; some results are confirmed by measurements.
Domenico Impiombato - One of the best experts on this subject based on the ideXlab platform.
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UVscope and its application aboard the ASTRI-Horn telescope
Experimental Astronomy, 2021Co-Authors: Maria Concetta Maccarone, Giovanni La Rosa, Osvaldo Catalano, Salvo Giarrusso, Alberto Segreto, Benedetto Biondo, Pietro Bruno, Carmelo Gargano, Alessandro Grillo, Domenico ImpiombatoAbstract:UVscope is an instrument, based on a multi-pixel photon detector, developed to support experimental activities for high-energy astrophysics and cosmic ray research. The instrument, working in single photon counting mode, is designed to directly measure light flux in the wavelengths range 300-650 nm. The instrument can be used in a wide field of applications where the knowledge of the nocturnal environmental luminosity is required. Currently, one UVscope instrument is allocated onto the External Structure of the ASTRI-Horn Cherenkov telescope devoted to the gamma-ray astronomy at very high energies. Being co-aligned with the ASTRI-Horn camera axis, UVscope can measure the diffuse emission of the night sky background simultaneously with the ASTRI-Horn camera, without any interference with the main telescope data taking procedures. UVscope is properly calibrated and it is used as an independent reference instrument for test and diagnostic of the novel ASTRI-Horn telescope.
L Manholm - One of the best experts on this subject based on the ideXlab platform.
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analysis of an untilted wire excited slot in the narrow wall of a rectangular waveguide by including the actual External Structure
IEEE Transactions on Antennas and Propagation, 1997Co-Authors: Jiro Hirokawa, L Manholm, Persimon KildalAbstract:The admittance of an untilted slot in the narrow wall of a rectangular waveguide is calculated by including the actual External Structure. The slot is excited by two tilted thin wires inside the waveguide. The slot is also allowed to extend into the two broad walls of the waveguide to make it sufficiently long for resonance to occur. The External slot admittance is evaluated by using a spectrum of two-dimensional solutions, a method which can handle the arbitrary cross section of the External Structure, The analysis predicts that if both the slot and the wires are tuned to resonance, the transmission coefficient gets constant phase over a wide-frequency band. The results also show that resonance can be obtained for any slot length by adjusting the wire length, and this relation between the lengths is presented. The distance between the slot and the wires needed to maximize the radiated power is also shown; some results are confirmed by measurements.
Maria Concetta Maccarone - One of the best experts on this subject based on the ideXlab platform.
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UVscope and its application aboard the ASTRI-Horn telescope
Experimental Astronomy, 2021Co-Authors: Maria Concetta Maccarone, Giovanni La Rosa, Osvaldo Catalano, Salvo Giarrusso, Alberto Segreto, Benedetto Biondo, Pietro Bruno, Carmelo Gargano, Alessandro Grillo, Domenico ImpiombatoAbstract:UVscope is an instrument, based on a multi-pixel photon detector, developed to support experimental activities for high-energy astrophysics and cosmic ray research. The instrument, working in single photon counting mode, is designed to directly measure light flux in the wavelengths range 300-650 nm. The instrument can be used in a wide field of applications where the knowledge of the nocturnal environmental luminosity is required. Currently, one UVscope instrument is allocated onto the External Structure of the ASTRI-Horn Cherenkov telescope devoted to the gamma-ray astronomy at very high energies. Being co-aligned with the ASTRI-Horn camera axis, UVscope can measure the diffuse emission of the night sky background simultaneously with the ASTRI-Horn camera, without any interference with the main telescope data taking procedures. UVscope is properly calibrated and it is used as an independent reference instrument for test and diagnostic of the novel ASTRI-Horn telescope.
