Structure and method for reducing EM radiation, and electric object and manufacturing method thereof

An electric object, comprising:

• a plurality of electric surface, each thereof being opposite with next one and being spaced from each other by a corresponding predetermined thickness;
• a slot, crossing one of the electric surfaces to divide the corresponding electric surface into a plurality of sub electric surfaces;
• at least one transmission line structure, positioning on one of the electric surfaces without the slot, and crossing over the slot of another electric surface;
• a first via, connecting the electric surface with the slot to another electric surface, and positioning on a side of the transmission line structure;
• and
• a first resonance line, disposed on one of the electric surfaces without the slot, and electrically connected to the first via,
• wherein the first resonance line crosses over the slot located on another electric surface.

A method for reducing EM radiation, adapted for an electric object having a plurality of electric surfaces, and each of the electric surfaces being opposite with next one and spaced from each other by a corresponding predetermined thickness, a slot crossing one of the electric surfaces to divide the corresponding electric surface into a plurality of sub electric surfaces, and at least one transmission line structure disposed on one of the electric surfaces without the slot, and the method comprises:

• disposing a first resonance line at one side of the transmission line structure on one of the electric surfaces without the slot, and making the first resonance line crossing over the slot located on another electric surface;
• connecting the first resonance line to the electric surface with the slot;
• and
• adjusting at least one of a length, a width and a shape of the first resonance line, to make an input impedance seen from a crossed point between the transmission line structure and the slot approximately 0.

A manufacturing method of an electric object, comprising:

• forming a plurality of electric layers, and making each of the electric layers with corresponding predetermined thickness respectively opposite to next one;
• forming a slot on a surface of one of the electric layers;
• forming a transmission line structure on a surface one of the electric surfaces without the slot, and making the transmission line structure crossing over the slot positioning on another electric layer;
• forming at least one first hole in the electric layers to expose a part of the surface of electric layer with the slot to the surface of another electric layer, wherein the first hole being located at one side of the transmission line structure;
• forming a first via which is connected to a surface of the electric layer with the slot in the first hole;
• and
• forming a first resonance line on a surface of one of the electric layers without the slot, and making the first resonance line being electrically connected to the first via and crossing over the slot on another electric layer.