Layered type balloon transformer

A technology of balancing transformers and transformers, which is applied in the directions of broadband transformers, transformer/inductor components, transformer/inductor coils/windings/connections, etc., which can solve the problems of lack of universality and inapplicability of transformers
CN101454848AInactive Publication Date: 2009-06-10MURATA MFG CO LTD
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Patent Information

Authority / Receiving Office
CN Β· China
Patent Type
Applications(China)
Current Assignee / Owner
MURATA MFG CO LTD
Publication Date
2009-06-10
Estimated Expiration
Not applicable Β· inactive patent

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Abstract

A laminated balun transformer that may be applied to the lines having various impedances is provided. The laminated balun transformer includes a magnetic substrate 1, a laminated body 2, a magnetic substrate 3, and external electrodes 4-1 to 4-6. The laminated body 2 includes a first transformer 5, a second transformer 6, and an insulator 7 that covers the first and second transformers 5 and 6 from the outside. The first transformer 5 is formed of a primary coil 5-1 and a secondary coil 5-2. The second transformer 6 is formed of a primary coil 6-1 and a secondary coil 6-2. Then, the line width of the primary coil 5-1 of the first transformer 5 is set so as to decrease from the side of the internal electrode 52a toward the side of the internal electrode 51a. The line width of the secondary coil 6-2 of the second transformer 6 is also set so as to decrease from the side of the internal electrode 62a toward the side of the internal electrode 61a.
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Description

technical field

[0001] The present invention relates to a laminated balun used as a balun for an IC of a mobile phone or an antenna of a television receiver. Background technique

[0002] Such as Figure 22 As shown in the equivalent circuit diagram of , the balun transformer has a first transformer 100 and a second transformer 200 . Furthermore, the windings 101, 102 constituting the first transformer 100 and the windings 201, 202 constituting the second transformer 200 are connected as shown in the figure, and the ratio of the impedance on the unbalanced terminal 300 side to the impedance on the balanced terminal 301, 302 side is 1. than 4.

[0003] Conventionally, as a multilayer balun transformer having such a circuit configuration, for example, there is a technology disclosed in Patent Document 1 or Patent Document 2.

[0004] These laminated balun transformers are composed of winding conductor patterns forming the windings of the first transformer 100 and the second ...

Claims

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