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17 records (took 0.028 seconds)

    11.
    发明专利
    未知

    公开(公告)号：SE9701738L

    公开(公告)日：1998-11-08

    申请号：SE9701738

    申请日：1997-05-07

    Applicant: ERICSSON TELEFON AB L M

    Inventor： SANDSTEDT JONAS ,  SNYGG GOERAN

    IPC: H01Q1/24 ,  H01Q1/38 ,  H01Q9/04 ,  H01Q21/08

    Abstract: A device for antennas, in particular dual-polarized microwave antennas with single-polarized patches, for which antennas reduced cross-polarization and reduced cross-coupling can be achieved without impairing the bandwidth of the antenna or increasing the occurrence of grating lobes. A modification of the traditionally rectangular geometry of the single-polarized patches is carried out. The modification is symmetrical in relation to the plane in which the linear-polarized signal lies for the respective patch. The modification involves the patches narrowing towards the ends along the respective polarization axis in such a manner that side edges which face side edges of adjacent patches are formed. In this way, the coupling between adjacent patches and also the cross-polarization in the respective patch are reduced.

    13.
    发明专利
    未知

    公开(公告)号：SE9700047D0

    公开(公告)日：1997-01-10

    申请号：SE9700047

    申请日：1997-01-10

    Applicant: ERICSSON TELEFON AB L M

    Inventor： SANDSTEDT JONAS ,  JOHANNISSON BJOERN ,  SNYGG GOERAN

    IPC: H01Q9/04 ,  H01Q13/10 ,  H01Q21/06 ,  H01Q21/08 ,  H01Q21/10 ,  H01Q

    Abstract: A device for microstrip distribution networks and for group antennas for the suppression of unwanted modes on the distribution network side of a microstrip distribution network. This thereby avoids, among other things, unwanted coupling between antenna elements connected to the microstrip distribution network. A waveguide substructure in principle designed as a U of extruded aluminium, is connected to the microstrip distribution network along two connection lines with at least two electrically-conductive connections to the ground plane of the microstrip distribution network along each connection line. Together with at least part of the ground plane, the waveguide substructure forms a waveguide structure. The waveguide structure is dimensioned so that it has a cut-off frequency that is higher than the highest frequency that is used in the microstrip distribution network. This suppresses unwanted modes generated by the group antenna and by discontinuities in the distribution network as the waveguide structure acts as a high-pass filter.

    16.
    发明专利
    未知

    公开(公告)号：SE9701738D0

    公开(公告)日：1997-05-07

    申请号：SE9701738

    申请日：1997-05-07

    Applicant: ERICSSON TELEFON AB L M

    Inventor： SANDSTEDT JONAS ,  SNYGG GOERAN

    IPC: H01Q1/24 ,  H01Q1/38 ,  H01Q9/04 ,  H01Q21/08 ,  H01Q

    Abstract: A device for antennas, in particular dual-polarized microwave antennas with single-polarized patches, for which antennas reduced cross-polarization and reduced cross-coupling can be achieved without impairing the bandwidth of the antenna or increasing the occurrence of grating lobes. A modification of the traditionally rectangular geometry of the single-polarized patches is carried out. The modification is symmetrical in relation to the plane in which the linear-polarized signal lies for the respective patch. The modification involves the patches narrowing towards the ends along the respective polarization axis in such a manner that side edges which face side edges of adjacent patches are formed. In this way, the coupling between adjacent patches and also the cross-polarization in the respective patch are reduced.

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