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Filter structure

一种滤波器结构、导体层的技术，应用在波导型器件、电路装置、电气元件等方向，能够解决困难等问题

Inactive Publication Date: 2010-06-09
TELLABS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, finding a satisfactory compromise between power transfer capability and stopband width can prove difficult in some cases

Method used

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Embodiment Construction

[0023] Figure 1a A filter structure according to an embodiment of the invention is shown viewed from the normal direction of the printed circuit board. Figure 1b shows the filter structure in accordance with Figure 1a Side view of the section on the line A-A marked. The filter structure includes a first conductor layer 101 and a second conductor layer 102 spaced apart from the first conductor layer and substantially parallel to the first conductor layer ( Figure 1b ). Between the conductor layers 101 and 102 there is an insulating material 103 . exist Figure 1b In the depicted case, both conductor layers are internal layers in the printed circuit board. However, this is not required, but one or both of these conductor layers may generally be a surface conductor layer on a printed circuit board.

[0024] The first conductor layer 101 has a pattern with interconnected pattern units 106 to 114 . In each pattern unit (such as 106), there is a low-impedance conductive reg...

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Abstract

In a filter structure for suppressing a spurious signal, a conductor layer in a printed circuit board comprises a pattern with interconnected pattern elements (106 to 114). A pattern element includes a low-impedance conductive region (119) the capacitance of which against a second conductor layer of the printed circuit board is dominant over the inductance. A pattern element comprises at least two adjacent high-impedance conductor strips (115, 116) in a first direction, connected to a low-impedance conductive region, and at least two adjacent high-impedance conductor strips (117, 118) in a second direction, connected to the low-impedance conductive region. The inductance of each high-impedance conductor strips is dominant over the capacitance against the second conductor layer. The high-impedance conductor strips form together with the low-impedance conductive region a plurality of resonance points in the frequency range, thus achieving sufficient stop-band width.

Description

technical field [0001] The present invention relates to a filter structure for suppressing spurious signals coupled between conductor layers of a printed circuit board. The invention also relates to a method for suppressing spurious signals coupled between conductor layers of a printed circuit board. The invention further relates to an electronic device. Background technique [0002] The trend in electronic devices is towards higher clock frequencies and lower voltage levels. As a result, electronic devices are becoming more and more susceptible to external electromagnetic disturbances, while on the other hand, they themselves generate more electromagnetic disturbances. The conductor layers of the printed circuit board form waveguides capable of transmitting high-frequency electromagnetic disturbances. For example, power planes and power ground planes can transmit high-frequency electromagnetic disturbances to the power terminals of a circuit component, causing the power ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01P1/20
CPCH05K2201/09309H05K2201/09681H05K1/0236H01P1/2005H01P1/2039H01P1/205
Inventor 彭蒂·伊莫宁亚尔诺·泰尔沃
Owner TELLABS