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    • 2. 发明公开
    • WIRELESS NETWORK DEVICE INCLUDING A POLARIZATION AND SPATIAL DIVERSITY ANTENNA SYSTEM
    • 一间极化和分集天线系统中的无线网络设置
    • EP2162951A1
    • 2010-03-17
    • EP07725800.2
    • 2007-06-04
    • Pirelli & C. S.p.A.
    • BARBIERI, DanieleBOFFA, VincenzoGERMANI, SimoneRICCI, FabrizioSTORTO, Marco
    • H01Q21/28H01Q1/22H04B7/10
    • H01Q21/24H01Q1/2291H01Q21/28H04B7/10
    • The present invention relates to a wireless access gateway (1) for communication of wave signals at radio frequencies within a frequency band, the access gateway being enclosed in a housing (2) and comprising a bottom wall (13) and a main circuit board (7) overlying said bottom wall (13) and having an upper surface substantially parallel to the bottom wall. The gateway is equipped with an antenna system comprising at least two antennas: a first linearly polarized antenna (4) for propagating a first wave signal along a first polarization axis comprising a first radiating element extending along a first longitudinal axis lying on a first plane substantially parallel to the base plane, and a second linearly polarized antenna (5) for propagating a second wave signal along a second polarization axis oriented perpendicularly to the first polarization axis, the second antenna comprising a second radiating element extending along a second longitudinal axis lying on a second plane oriented perpendicularly to the first plane. The first and second antennas are positioned relative to each other at a distance of at least λ2, where λ is the wavelength corresponding to a radio frequency within the frequency band. The two antennas are physically separated within the housing of the gateway so as to achieve spatial diversity and they are oriented with orthogonal polarizations so as to achieve polarization diversity. Given that the polarization axes of the two antennas are orthogonal, lie on perpendicular planes and one of one of the antennas is arranged on a plane parallel to the bottom wall, the antenna system is able to maintain communication quality when the access gateway is placed in different operating positions.