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Transmission line type components

A component and line-type technology, applied in waveguide-type devices, electrical components, electro-solid devices, etc., can solve problems such as operation errors, little development into actual products, low impedance, etc.

Inactive Publication Date: 2004-06-23
NEC CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] As is well known, for example, printed circuit boards having high-speed, high-frequency circuit elements represented by LSI (Large Scale Integration) have conventionally had a problem that electromagnetic interference or EMI (Electromagnetic Interference) is caused by electromagnetic noise generated from the circuit board, and this leads to operational errors in the electronic device with the board or in another electronic device
However, highly capacitive dense bypass capacitors, which have the characteristics of expressing resonant frequencies exceeding GHz and exhibiting low impedance in a wide frequency band, are unlikely to be developed into practical products and become commercially available.

Method used

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Examples

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Embodiment Construction

[0043] Based on the embodiments with reference to the accompanying drawings, the transmission line type assembly according to the present invention will be described in detail as follows.

[0044] Figure 1 shows a basic arrangement of a conveyor line assembly 1 according to an embodiment of the present invention, wherein Figure 1(a) relates to a perspective view of an outline, Figure 1(b) relates to a side sectional view, and Figure 1(c ) refers to a sectional view parallel to an end surface along line AA' of FIG. 1( b ).

[0045] The transmission line type module 1 is a module mounted on a printed circuit board. The transmission line type assembly 1 is suitably used as a high-frequency decoupling device (decoupler) to couple a DC power distribution circuit of a semiconductor switching circuit. By forming the signal conductor 2 as a cylindrical inner conductor formed of a conductive material, a coaxial line is formed, and the coaxial line extends in an axial direction and coa...

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Abstract

A transmission line type component (1, 1') having an arrangement in which a coaxial line having a very low characteristic impedance is constructed by coaxially arranging a cylindrical external conductor which is formed from a conductive material and has a larger diameter than that of an internal conductor so as to cover, via a high-k insulating member, the surface of the internal conductor which is formed from a conductive material is inserted in series between a power supply line (8) and ground line (9), which are connected to a DC power supply on a printed circuit board, and the power supply port of an LSI (6). With this arrangement, most of a high-frequency power supply current generated from the LSI (6) is reflected by the power supply port of the LSI (6). Part of the high-frequency power supply current which enters the component (1, 1') is consumed by the dielectric loss and does not reach the external power supply line (8).

Description

Background technique [0001] The present invention relates to transmission line type components, which are electronic components suitable for high-frequency decoupling (decoupling) devices (decoupling components, so-called decouplers) mainly for semiconductor switching circuits, and as electronic components with high-speed, high-frequency circuits digital printed circuit boards for components or power lines for semiconductor packages. [0002] As is well known, for example, printed circuit boards having high-speed, high-frequency circuit elements represented by LSI (Large Scale Integration) have conventionally had a problem that electromagnetic interference or EMI (Electromagnetic Interference) is caused by electromagnetic noise generated from the circuit board, And this leads to operational errors in the electronic device with the board or in another electronic device. [0003] A particularly large portion of the electromagnetic noise generated is that known as common modenoi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01P1/202H01P3/06H05K1/00H05K1/02
CPCH05K2201/09809H01P1/202H05K2201/10287H05K1/0298H01L2224/48247H05K1/0219H01P3/06H05K1/0243H01L2924/30107H01L2924/3011H01L2224/48091H01L2224/49171H01L2924/00H01L2924/00014
Inventor 吉田史郎远矢弘和清水政行
Owner NEC CORP