Millimeter-wave band LC filter

A millimeter-wave (mmWave) band LC filter comprising:

• a first ground layer configured to provide an electrical ground;
• a second ground layer spaced apart from the first ground layer;
• a via wall having one end connected to the first ground layer and an other end connected to the second ground layer, the via wall comprising a plurality of vias spaced apart from each other;
• a blocking wall formed as a part of the via wall so as to protrude toward an interior of a resonance space defined by the first ground layer, the via wall, and the second ground layer, thereby dividing the resonance space into a plurality of sub-spaces;
• a plurality of holes, each being formed in the second ground layer to open one side of a respective one of the plurality of sub-spaces divided by the blocking wall;
• a plurality of pins, each having one end connected to the first ground layer and an other end passing through a respective one of the plurality of holes;
• a plurality of pin electrodes, each being connected to the other end of a respective one of the plurality of pins, spaced apart from the second ground layer, and formed to face a portion of the second ground layer;
• a floating electrode spaced apart from the plurality of pin electrodes and formed to face portions of two pin electrodes among the plurality of pin electrodes;
• and
• a plurality of input/output terminals directly connected to or spaced apart from the plurality of pin electrodes and configured to receive and output signals.