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An inductive shielding ring

A shielding ring and inductance technology, applied in the field of shielding rings, can solve the problems of large area occupied by the layout and low quality factor of the inductance, and achieve the effects of improving the quality factor, avoiding electromagnetic interference, and improving stability

Active Publication Date: 2018-04-17
SHANGHAI INST OF MICROSYSTEM & INFORMATION TECH CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In view of the above-mentioned shortcomings of the prior art, the purpose of the present invention is to provide an inductance shielding ring, which is used to solve the problems in the prior art that the layout of the planar spiral inductance shielding ring occupies a large area and the inductance quality factor is low.

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Embodiment 1

[0034] Such as image 3 As shown, the present invention provides an inductor shielding ring comprising: a planar spiral inductor 1 and a shielding ring 3 .

[0035] In this embodiment, the planar spiral inductor 1 is located at the center of the shielding ring 3, and the distance between the metal inner ring of the shielding ring 3 and the metal outer ring of the planar spiral inductor 1 is d 2 20mm to 50mm. The shielding ring 3 in the prior art requires a relatively large safe distance from the inductor (d 1 >80mm) can avoid reducing the performance of the inductor and ensure that the accuracy of the inductor model is not affected. However, when the safety distance is reduced to 20mm-50mm in the present invention, the inductance still has better performance, and the inductance model is not affected. In this embodiment, the distance d between the metal inner ring of the shielding ring 3 and the metal outer ring of the planar spiral inductor 1 2 are equidistant. Of course,...

Embodiment 2

[0043] In this embodiment, the electromagnetic field simulation software HFSS is used to Figure 1~3 The inductance value and inductance Q value of the three kinds of structures are simulated. Among them, IND1 is figure 1 The inductance of the unshielded ring design, IND2 is figure 2Among them, there is the inductance designed by shielding ring 2 in the prior art, and IND3 is image 3 Among them is the inductance designed by the shielding ring 3 of the present invention. Such as figure 2 with image 3 As shown, the distance d from the metal inner ring of the shielding ring to the metal outer ring of the planar spiral inductor 1 and d 2 Both are 50mm.

[0044] Figure 4 For the comparison of the simulation results of the inductance value (L). In this implementation, by comparing the inductance values ​​extracted from the simulation results of the three inductors, it is found that when the inductance value is below 4GHz (the frequency range of 2GHz to 4GHz is a common...

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Abstract

The invention provides an inductor shielding ring. The inductor shielding ring comprises a planar spiral inductor and a shielding ring, wherein the planar spiral inductor is positioned at the central position of the shielding ring; the shielding ring is annular-shaped and consisting of discontinued metal blocks; and the metal blocks are connected with a diffusion zone via through holes. The invention provides the inductor shielding ring used for solving the problems of large layout occupied area and low inductor quality factor of the planar spiral inductor shielding ring in the prior art.

Description

technical field [0001] The invention relates to a shielding ring, in particular to a plane spiral inductance shielding ring. Background technique [0002] Inductors can realize tuning, impedance matching, filtering and other functions in radio frequency technology, so they are widely used in radio frequency circuits. With the rapid development of radio frequency integrated circuits, the requirements for high performance, low power consumption and integration of integrated circuits are getting higher and higher. In the design of radio frequency integrated circuits, in order to avoid the interaction between the planar spiral inductor and other devices, and to avoid the drift of the circuit operating frequency, it is necessary to design a shielding ring for shielding. However, using the shielding ring design method in the prior art will result in larger layout area, and reduce the quality factor of the inductance, which is not conducive to the performance of the circuit perfor...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01F27/36
CPCH01F27/36
Inventor 陈静吕凯罗杰馨柴展何伟伟黄建强林泽王曦
Owner SHANGHAI INST OF MICROSYSTEM & INFORMATION TECH CHINESE ACAD OF SCI