Millimeter Wave Antennas with Gaussian Radiation Patterns(Special Issue on Innovation in Antennas and Propagation for Expanding Radio Systems)
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概要
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Several configurations of millimeter wave Gaussian Beam Antennas (GBAs) are studied in this paper. A GBA is a quasi-planar radiating structure comprising a plano-convex half-wavelength Fabry-Perot (FP) resonator excited by a guided source or by a printed source. Both partially transparent mirrors of the resonator are formed with two-dimensional metal meshes. GBAs have very low side lobes, because of the gaussian distribution of the aperture electric field. They can be efficiently used in Wireless Local Area Networks in the 60 GHz band. After a brief presentation of intrinsic properties of FP cavities illuminated by a plane wave under normal incidence, performances of four passive GBAs are described and compared to theoretical results: the first two configurations concern cavities fed either by a waveguide (GBA#1), or by a pyramidal horn antenna (GBA#2); in the last two ones, the cavities are excited by a linearly polarized microstrip patch antenna (GBA#3), or by a coaxial-probe circularly polarized antenna array (GBA#4). These various examples enable to deduce and to compare typical radiation performances of GBAs, depending on (i) the feeding technique (planar or guided), on (ii) the geometry of the FP resonator (radius of curvature, grid parameters) and on (iii) the polarization (linear or circular). In particular, for a planar primary source, it is shown that the directivity and the efficiency of GBAs are respectively in the range [15.5 dB-23.5 dB] and [20%-50%], if power reflectivities of both mirrors are higher than 96.5% and lower than 99.5%, and if the radius of curvature of the cavity varies between 30λ_0 and 1600λ_0.
- 2001-09-01
著者
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MATSUI Toshiaki
Communication Research Laborator
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SHINOHARA Keisuke
Communications Research Laboratory
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Matsui Toshiaki
Communications Research Laboratory Ministry Of Posts And Telecommunications
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Mimura Takashi
National Institute Of Information And Communications Technology (nict)
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Matsui Toshiaki
National Institute Of Information And Communications Technology (nict)
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Hirose Nobumitu
Company "antennes Process
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Coquet Philippe
Equipe Antennes Et Technologies
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SAULEAU Ronan
Laboratoire ART
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SHINOHARA Keisuke
Ecole Normale Superieure de Cachan, Antenne de Bretagne
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DANIEL Jean-Pierre
Communications Research Laboratory, Ministry of Posts and Telecommunications
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Shinohara Keisuke
Ecole Normale Superieure De Cachan Antenne De Bretagne
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Daniel Jean-pierre
Communications Research Laboratory Ministry Of Posts And Telecommunications
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Coquet Philippe
Ecole Normale Superieure De Cachan Antenne De Bretagne
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Daniel Jean-pierre
Company "antennes Process
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Hirose Nobumitu
Communications Research Laboratory Ministry Of Posts And Telecommunications
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