Patent ID: 6853073

Claim:
A microwave electronic device ( 1 ) comprising a metal enclosure ( 2 ) having a bottom ( 21 ) and a lid ( 23 ) and containing an electronic circuit board ( 3 ) disposed substantially parallel to said bottom and to said lid, said circuit board having: conductive bottom and top grounding layers ( 41 , 42 ) respectively disposed on bottom and top faces ( 31 , 32 ) of the circuit board, and perforations ( 7 , 7 a ) transverse to said faces of the circuit board and delimited by conductive walls ( 71 ) for electrically interconnecting said bottom and top grounding layers ( 41 , 42 ), at least some of said walls ( 71 ) being electrically connected to the lid of the enclosure by conductive grounding members ( 8 , 8 a , 8 b ), which device is characterized in that each conductive member ( 8 a ) has a metal blade ( 11 , 11 ′) disposed between said lid and said top layer in a blade plane (P 1 ) perpendicular to said faces ( 31 , 32 ) and covered at least in part with a material ( 13 , 13 ′) for absorbing microwaves at frequencies less than or equal to a maximum operating frequency of said device.