Samsung Electronics Co., Ltd.

Hyun Ho Park

Hark Byeong Park

Jun Young Lee

Jin Baek Kim

Hyung Lee

Young Jun Moon

Jong Sung Lee

Jung Hyeon Kim

Byong Su Seol

Hyun Seok Jung

Hyung Geun Kim

A cylindrical electromagnetic bandgap to reduce electromagnetic interference of a cable and a coaxial cable having the same includes a conductor patch having a curved surface to be spaced apart from the surface of the cylindrical cable to an outer side by a predetermined gap distance, and a via connecting the surface of the cylindrical cable to the conductor patch.

Cylindrical electromagnetic bandgap and coaxial cable having the same

Disclosed is a multilayer printed circuit board. The multilayer printed circuit board includes a power source surface to provide power to each component disposed on the power source surface, a ground surface having a reference voltage, a strip line which passes through the power source surface and/or the ground surface so as to transmit signals between components, an antenna installed in proximity to a sectional region of the power source surface and the ground surface, and an electromagnetic wave reduction member which is provided between the power source surface and the ground surface to effectively reduce an electromagnetic wave generated from the strip line.

Multilayer printed circuit board having electromagnetic wave reduction member

An outdoor unit for an air conditioner is disclosed. The outdoor unit according to the present invention comprises a housing which has an air inlet and an air outlet, a ventilation fan rotatably mounted in the housing, and a fan guard connected to the housing to cover the air outlet. Here, the fan guard comprises a plurality of closed ribs arranged sequentially and concentrically between a center and an outline thereof, and a plurality of radial ribs arranged in radial directions to interconnect the plurality of closed ribs, in such a manner that some of the closed ribs, which are disposed at intermediate positions near tips of the ventilation fan, are at a further distance from the ventilation fan than the other closed ribs, which are disposed near the center and the outline. Accordingly, since the fan guard is convexly raised at a position corresponding to the tips of the ventilation fan, thereby guaranteeing a predetermined space between the fan guard and the tips where the airflow is fastest, the flow resistance and the flow-induced noise can be reduced.

Fan guard and outdoor unit for air conditioner having the same

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Daedeok-gu, South Korea

Hyun Ho Park