Noise suppression device and equivalent circuit thereof

A noise suppression device for application in an electronic product, the noise suppression device comprising:

• a metal plate providing a noise transmission path, and connected to a ground of the electronic product;
• and
• at least one first resonance unit including a plurality of first resonators, each of the plurality of first resonators including:
• a first metal segment, and
• a first conductive connection segment that is connected to the first metal segment;
• wherein the first resonance unit is a dismountable element which is fixed on the metal plate by pasting or by at least one fixed element;
• wherein, when the at least one first resonance unit is fixed on the metal plate, each of the first metal segments is connected to the metal plate via the corresponding first conductive connection segment;
• and
• wherein, when the plurality of first resonators undergo resonance, a noise transmitted on the metal plate is conducted to the plurality of first resonators and suppressed by the plurality of first resonators.

An equivalent circuit of a noise suppression device, comprising:

• a first equivalent transmission line model including:
• a first master transmission conductor connected at one port thereof to an input end, and connected at another port thereof to an output end, and
• a first slave transmission conductor disposed on a return path;
• and
• at least one first resonance circuit model including a first resistor, a first inductor, and a first capacitor connected in order in series between the input end and the return path;
• wherein, when the at least one first resonance circuit model undergoes resonance, a noise transmitted by the first equivalent transmission line model is conducted to the at least one first resonance circuit model and suppressed by the at least one first resonance circuit model.