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Irreversible circuit module

A circuit module and electrical connection technology, applied in the field of irreversible circuit modules, can solve the problems of deterioration of isolation characteristics, deviation of coupling degree, deterioration of electrical performance of irreversible circuit elements, etc.

Inactive Publication Date: 2002-11-20
HITACHI METALS LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

That is, if the central conductor assembly is miniaturized, it will deviate from the size of the magnetic body for the optimum operation of the nonreciprocal circuit element, and if a dielectric material with a high dielectric constant is used in order to miniaturize the medium, the loss caused by the medium will increase relatively, making the Deterioration of electrical properties of nonreciprocal circuit components
[0007] If the directional coupler 2 is miniaturized, the isolation characteristics will deteriorate significantly
Due to the deterioration of the isolation characteristic, the directivity (directivity), which is one of the important characteristics of the directional coupler 2, cannot be sufficiently obtained. As a result, there is also the following problem: part or all of the reflected wave opposite to the traveling direction of the transmission signal flows into the coupling and takes out terminal P5, the desired coupling degree cannot be obtained
[0011] However, in the case of using the output detection capacitor, sufficient directivity cannot be obtained due to the influence of the parasitic capacitance, so there is a problem that if the output detection capacitor designed in consideration of the interference between electrode patterns is not formed on the stack In the layer body, the desired coupling degree cannot be obtained
In addition, in order to obtain a coupling degree of 20dB, it is necessary to form a very small output detection capacitor of 0.15pF, so it is difficult to control, and there is also a problem that the coupling degree may vary due to manufacturing variations or parasitic capacitance.
In addition, due to the problem of interference between electrode patterns, it is substantially difficult to further miniaturize

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0067] use image 3 An example of the internal structure of the laminated body 11 will be described in order of lamination. The laminated body 11 is used for a non-reciprocal circuit module of W-CDMA (Wideband CDMA (Wideband CDMA) transmission frequency TX1.92GHz-1.98GHz). Here, for simplicity of description, W-CDMA is used as an example as the standard of the wireless communication device, but the effect of the present invention does not change even if it is another standard.

[0068] First, the ground electrode 63 is formed on substantially the entire back surface of the lowermost original sheet 112, and electrodes 80a to 80c for connecting to the connection electrodes 30a to 30c formed on the resin base 12 are formed. After the original sheets 111 and 110 on which electrode patterns are not printed are laminated on the original sheet 112, the original sheet 109 constituting the line electrode 73 of the first transmission line is laminated. The original sheet 108 on which ...

Embodiment 2

[0080] Figure 5 An equivalent circuit of a nonreciprocal circuit module of another embodiment of the present invention is shown. The non-reciprocal circuit module also includes a low-pass filter function in addition to the directional coupler function.

[0081] The nonreciprocal circuit module of this embodiment has the same parts as the nonreciprocal circuit module of Embodiment 1, so only the different parts will be described here. The difference from Embodiment 1 is: (1) The first and second electrostatic capacitors C3 and C4 are connected between the two ends of the first transmission line and the ground, and the first transmission line and the first and second electrostatic capacitors C3 , C4 constitute a low-pass filter, (2) In order to make the attenuation steeper, a third electrostatic capacitor C2 is connected in parallel to the first transmission line.

[0082] Image 6 is an exploded perspective view of the laminated body 11 of this embodiment. The difference f...

Embodiment 3

[0086] In Embodiments 1 and 2, the non-reciprocal circuit module for W-CDMA is described, but in this embodiment, the D-AMPS (Digital-Advanced Mobile Phone Service (Digital Advanced Mobile Phone System) transmission frequency TX824MHz~849MHz) is described. The nonreciprocal circuit module used.

[0087] Generally, as the processing frequency decreases, the inductance, load capacitance, and line length of the directional coupler all need to be increased, making it difficult to miniaturize. Therefore, in this embodiment, using Figure 9 The shape of a part of the circular hole 16 of the laminated body 11 is filled. As a result, there are advantages in that the area of ​​the electrode pattern on the original sheet can be increased, the capacitance value of the load capacitor C1 can be increased, and the grounding can be stabilized. Therefore, in this embodiment, the shape of the magnetic body 13 is a deformed circle with a diameter of 2.5 mm and a cutoff at a distance of 0.75 m...

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Abstract

The irreversible circuit module includes: (a) a permanent magnet, which applies a DC magnetic field to the magnetic body; (b) a composite body, where a plurality of central conductors with one end as a common end and the other end as a high-frequency signal input and output end are arranged on the magnetic body, ( c) a plurality of load capacitors formed in a laminate of a plurality of dielectric layers having a conductor layer connected to the center conductor, (d) a first transmission line connected to one of the center conductors, and (e) The second transmission line is magnetically coupled with the first transmission line; the first transmission line and the second transmission line are laminated and formed in the laminated body. A hole for accommodating the assembly is provided substantially in the center of the laminated body.

Description

technical field [0001] The present invention relates to nonreciprocal circuit modules such as circulators and isolators used in microwave communication devices such as portable phones. Background technique [0002] In recent years, the popularity of wireless communication devices such as mobile phones has been astonishing, and the functions and services of mobile phones have been improved day by day. Taking a portable phone as an example, the standard of the mobile phone includes, for example, the EGSM (Extended Global System for Mobile Communications) standard and the DCS1800 (Digital Cellular System 1800, Digital Cellular System 1800) standard, which are mainly popular in Europe. There are various standards such as the PCS (Personal Communication Service, Personal Communication System) standard prevailing in the United States, and the PDC (Personal Digital Cellular, Personal Digital Cellular) standard adopted in Japan. In a mobile phone using such ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01P1/387
CPCH01P1/387H01P1/383
Inventor 岸本靖伊藤博之堀口秀人由本学高桥洋一竹内绅一郎
Owner HITACHI METALS LTD