A miniaturized shielding box for microwave circuit packaging based on 3D printing manufacturing technology

Abstract

The invention discloses a novel three-dimensional printing manufacturing technology-based microwave circuit packaging shielding box. The shielding box not only has a relatively small size, but also has good cavity die suppression performance; and the shielding box includes a metal box cover and a metal box cavity, wherein the metal box cover is realized through three-dimensional printing manufacturing technology. Two-dimensional periodic structure units are arranged on an inner surface of the metal box cover, each structure unit consists of metal columns and a concave metal cover, thereby forming an inverted umbrella-shaped structure, one end of the metal column is vertically connected with an inner surface of a shielding box cover, and the other end of the metal column is vertically connected with an inner surface of the bottom of a groove of the concave metal cover. Series inductance and capacitance resonance is formed between each inverted umbrella-shaped structure unit and the shielding box bottom right under the unit, parallel inductance and capacitance resonance is formed between the inverted umbrella-shaped structure units, and the two kinds of resonance jointly form a stop band that suppresses noise in the packaging shielding box, and thus normal operation of a microwave circuit in the packaging shielding box can be effectively guaranteed.

Description

technical field [0001] The invention belongs to the field of electromagnetic field and microwave technology. It specifically relates to a novel microwave circuit packaging shielding box based on three-dimensional printing manufacturing technology. Background technique [0002] With the continuous improvement of microwave integrated circuit production technology, many complex microwave and millimeter wave circuit module components have been developed to adapt to the development of the times. Since most microwave and millimeter wave circuit module components are in the outdoor working environment, they are easily affected by the harsh natural environment, so in general, they need to be shielded with metal packaging; another advantage of this is that it can prevent packaging of internal circuit modules. Electromagnetic interference between the environment and the surrounding environment. However, since the metal shielding box itself is also a resonant cavity structure, the el...

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a new type of microwave circuit packaging shielding box based on three-dimensional printing manufacturing technology, to overcome the technical defect of cavity resonance noise caused by microwave circuit loading metal shielding box; and to introduce three-dimensional printing technology to process the designed complex shielding box structure, which overcomes the shortcomings of traditional mechanical processing technology

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