公开(公告)号：AU6234598A

公开(公告)日：1998-09-08

申请号：AU6234598

申请日：1998-02-13

Applicant: ERICSSON TELEFON AB L M

Inventor： SNYGG GORAN ,  LINDQVIST CHRISTER ,  TORSTENSSON LARS

IPC: H01Q1/24 ,  H01Q1/38 ,  H01Q13/08 ,  H01Q21/24 ,  H01Q9/00

公开(公告)号：AU5583598A

公开(公告)日：1998-08-03

申请号：AU5583598

申请日：1998-01-09

Applicant: ERICSSON TELEFON AB L M

Inventor： SANDSTEDT JONAS ,  JOHANNISSON BJORN ,  SNYGG GORAN

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

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.