The Experts below are selected from a list of 276 Experts worldwide ranked by ideXlab platform
Tae-in Jeon - One of the best experts on this subject based on the ideXlab platform.
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Tapered Parallel-Plate waveguide without silicon lens
2010Co-Authors: Tae-in JeonAbstract:This research reports an experimental and simulation study of a silicon-lens-free tapered Parallel-Plate waveguide (TPPWG) to improve THz coupling to the Plate separation gap. The TPPWG without any silicon lens is compared to the Parallel-Plate waveguide (PPWG) with a plano-cylindrical silicon lens. It was found that the input- and output-side TPPWG with a 3° tapered slop angle increased by about 103% at 1 THz compared to the PPWG.
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improvement of thz coupling using a tapered Parallel Plate waveguide
Optics Express, 2010Co-Authors: Sanghoon Kim, Eui Su Lee, Tae-in JeonAbstract:This paper reports an experimental and simulation study of a tapered Parallel-Plate waveguide (TPPWG) to improve THz coupling to the Plate separation gap. The flat- and round-type TPPWG without any silicon lens is compared to the Parallel-Plate waveguide (PPWG) with a plano-cylindrical silicon lens. The spectrum amplitudes of the input-side TPPWG and the input- and output-side TPPWG both having a 3 degrees slop angle increased about 56% and 103% at 1 THz when compared to that of the PPWG. Since the input- and output-side TPPWG had almost no impedance mismatch to the propagating THz wave, coupling to the waveguide could be improved twice compared with the PPWG.
Masahiro Tanaka - One of the best experts on this subject based on the ideXlab platform.
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Radiation properties of an arbitrarily flanged Parallel-Plate waveguide
IEEE Transactions on Antennas and Propagation, 2004Co-Authors: Dao Ngoc Chien, Kazuo Tanaka, Masahiro TanakaAbstract:The radiation properties of an arbitrarily flanged Parallel-Plate waveguide are investigated by means of the boundary integral equations that are called guided-mode extracted integral equations. The boundary integral equations derived in this paper can be solved by the conventional boundary-element method. Numerical results are presented for a number of cases of flanged Parallel-Plate waveguide. Reflection coefficient, reflected and radiated powers as well as radiation patterns are numerically calculated for the incidence of transverse electric guided-mode wave.
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Radiation properties of a tilted-flange Parallel-Plate waveguide
Proceedings of the 16th International Symposium on Power Semiconductor Devices & IC's, 2003Co-Authors: Dao Ngoc Chien, Kazuo Tanaka, Masahiro TanakaAbstract:The radiation properties of a tilted-flange Parallel-Plate waveguide (TFPPW) are investigated by the boundary element method (BEM) based on guided-mode extracted integral equations (GMEIE). The reflection coefficient, reflected and scattered powers as well as radiation pattern are calculated numerically for the case of incidence TE/sub 1/ guided-mode, including systems with dielectric filled and unfilled Parallel-Plate waveguide.
Naohisa Goto - One of the best experts on this subject based on the ideXlab platform.
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Waveguide-fed Parallel Plate slot array antenna
IEEE Transactions on Antennas and Propagation, 1992Co-Authors: Jiro Hirokawa, Makoto Ando, Naohisa GotoAbstract:A novel planar antenna in which radiating slots are arrayed on one side of a square Parallel Plate waveguide and coupling slots occupy the other side is proposed. The antenna is excited via the coupling slots by a rectangular waveguide. In order to suppress unwanted reflections and to assure the purity of the transverse electromagnetic traveling-wave mode in the Parallel Plate waveguide, all the slots are arrayed in pairs. An X-band model antenna was fabricated, and uniform aperture illumination was demonstrated with 48% antenna efficiency. These results demonstrate the feasibility of antennas of this type. >
Dao Ngoc Chien - One of the best experts on this subject based on the ideXlab platform.
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Radiation properties of an arbitrarily flanged Parallel-Plate waveguide
IEEE Transactions on Antennas and Propagation, 2004Co-Authors: Dao Ngoc Chien, Kazuo Tanaka, Masahiro TanakaAbstract:The radiation properties of an arbitrarily flanged Parallel-Plate waveguide are investigated by means of the boundary integral equations that are called guided-mode extracted integral equations. The boundary integral equations derived in this paper can be solved by the conventional boundary-element method. Numerical results are presented for a number of cases of flanged Parallel-Plate waveguide. Reflection coefficient, reflected and radiated powers as well as radiation patterns are numerically calculated for the incidence of transverse electric guided-mode wave.
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Radiation properties of a tilted-flange Parallel-Plate waveguide
Proceedings of the 16th International Symposium on Power Semiconductor Devices & IC's, 2003Co-Authors: Dao Ngoc Chien, Kazuo Tanaka, Masahiro TanakaAbstract:The radiation properties of a tilted-flange Parallel-Plate waveguide (TFPPW) are investigated by the boundary element method (BEM) based on guided-mode extracted integral equations (GMEIE). The reflection coefficient, reflected and scattered powers as well as radiation pattern are calculated numerically for the case of incidence TE/sub 1/ guided-mode, including systems with dielectric filled and unfilled Parallel-Plate waveguide.
Sven Nordebo - One of the best experts on this subject based on the ideXlab platform.
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Sum Rules for Parallel Plate Waveguides: Experimental Results and Theory
IEEE Transactions on Microwave Theory and Techniques, 2014Co-Authors: Iman Vakili, Mats Gustafsson, Daniel Sjöberg, Rebecca Seviour, Martin Nilsson, Sven NordeboAbstract:An experimental approach to investigate the forward scattering sum rule for periodic structures is presented. This approach allows an upper bound on the total cross section integrated over a bandwidth from a simple static problem to be found. Based on energy conservation, the optical theorem is used to construct a relation between the total cross section and the forward scattering of periodic structures as well as single scatterers inside a Parallel-Plate waveguide. Dynamic measurements are performed using a Parallel-Plate waveguide and a Parallel-Plate capacitor is utilized to find the static polarizability. Convex optimization is introduced to identify the total cross section in the dynamic measurements and estimate an optimal lower bound on the polarizability for objects. The results show that the interactions between the electromagnetic field and an object over all wavelengths are given by the static polarizability of the object.
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Sum Rules for Parallel Plate Waveguides: Experimental Results and Theory
2014Co-Authors: Iman Vakili, Mats Gustafsson, Daniel Sjöberg, Rebecca Seviour, Martin P. Nilsson, Sven NordeboAbstract:An experimental approach to verify the forward scattering sum rule for periodic structures is presented. This approach allows an upper bound on the total cross section integrated over a bandwidth from a simple static problem to be found. Based on energy conservation, the optical theorem is used to construct a relation between the total cross section and the forward scattering of periodic structures as well as single scatterers inside a Parallel Plate waveguide. Dynamic measurements are performed using a Parallel Plate waveguide and a Parallel Plate capacitor is utilized to find the static polarizability. Convex optimization is introduced to identify the total scattering in the dynamic measurements. The results show that the all spectrum interaction between the electromagnetic field and an object are proportional to the static polarizability of the object. (Less)
