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Directional Coupler

A directional coupler and inductor technology, applied in waveguide-type devices, circuits, connecting devices, etc., can solve the problems of signal wrapping, large size of directional coupler, invisible characteristics, etc., to improve attenuation, suppress coupling, improve Effects of Features

Active Publication Date: 2018-02-16
MURATA MFG CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] However, even if the low-pass filter is multi-staged, the size of the directional coupler becomes very large, and on the other hand, the expected improvement in characteristics cannot be seen.
In addition, even if a low-pass filter is simply inserted between the coupling terminal and the sub-line, and between the first sub-line and the second sub-line, unnecessary wrapping of the signal will occur in the directional coupler, which is not visible. Improvement to expected characteristics

Method used

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Experimental program
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no. 1 approach

[0035] figure 1 and figure 2 The directional coupler 100 according to the first embodiment of the present invention is shown. in, figure 1 It is an exploded perspective view of the case where the directional coupler 100 is configured using a laminated body formed by laminating a plurality of insulator layers. figure 2 will be figure 1 The diagram after replacing the structure of the exploded perspective view with an equivalent circuit.

[0036] like figure 1 As shown, the directional coupler 100 includes a laminated body 1 in which 16 insulating layers 1a to 1p are laminated. The laminated body 1 has a straight hexahedron shape.

[0037] Predetermined terminals are respectively formed on four side surfaces of the laminated body 1 . Hereinafter, the terminals formed on the laminated body 1 will be described, and for the sake of convenience, the figure 1 Terminals formed on each side surface will be described sequentially in order from the side surface on the front sid...

no. 2 approach

[0109] exist Figure 8 and Figure 9 A directional coupler 200 according to the second embodiment is shown in . in, Figure 8 It is an exploded perspective view of main parts in a case where the directional coupler 200 is configured using a laminate in which a plurality of insulator layers are laminated. Figure 9 will be Figure 8 The structural replacement of the main part of the disassembled perspective view is a diagram of an equivalent circuit.

[0110] exist figure 1 and figure 2 In the directional coupler 100 according to the first embodiment shown, the figure 1 The shown inductance components generated by a part of the capacitor electrode 10 formed on the insulator layer 1b, the via electrode 11a, and the first ground electrode 8 formed on the insulator layer 1a are as follows: figure 2 As shown, an additional inductor L11 is formed between the third capacitor C3 and the first ground terminal 4 .

[0111] In the directional coupler 200 according to the second...

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Abstract

Provided is a directional coupler wherein the degree of coupling is flat across a broadband and wherein coupling is suppressed in an unnecessary frequency band, comprising an input terminal 6, an output terminal 7, a coupling terminal 2, an end terminal 3, a first ground terminal 4, second ground terminals 5a-5c, a main line 12, a first auxiliary line 13a, and a second auxiliary line 13b, whereina first low pass filter LPF1 is inserted between the coupling terminal 2 and the first auxiliary line 13a, wherein a second low pass filter LPF2 is inserted between the first auxiliary line 13a and the second auxiliary line 13b, wherein the first low pass filter LPF1 is connected to the first ground terminal 4, and wherein the second low pass filter LPF2 is connected to the second ground terminals5a-5c.

Description

technical field [0001] The present invention relates to a directional coupler, and more specifically, to a directional coupler that can flatten the degree of coupling over a wide frequency band and suppress coupling in unnecessary frequency bands. Background technique [0002] In high-frequency equipment, in order to measure the characteristics of a high-frequency signal, a directional coupler that extracts a part of the high-frequency signal is used. The directional coupling of the general structure is to arrange the main line connected between the input terminal and the output terminal in parallel with the auxiliary line connected between the coupling terminal and the terminal terminal, and take out the high-frequency signal flowing through the main line from the auxiliary line. part. [0003] In a directional coupler, it is desired that the degree of coupling be flat over a wide frequency band and that coupling in unnecessary frequency bands (for example, frequency bands...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01P5/18
CPCH01P1/2039H01P5/184H01P5/18
Inventor 田中阳
Owner MURATA MFG CO LTD