IMPEDANCE MATCHING ELEMENT AND COMMUNICATION TERMINAL DEVICE

Title:

IMPEDANCE MATCHING ELEMENT AND COMMUNICATION TERMINAL DEVICE

Document Type and Number:

WIPO Patent Application WO/2021/240860

Kind Code:

A1

Abstract:

This impedance matching element (101) has: a first input/output terminal (T1) to which a power feed circuit (30) is connected; a second input/output terminal (T2) to which an antenna (40) is connected; a laminate in which a plurality of base layers are laminated; first coils (L11, L21) formed on the laminate, in which a first end is connected to the first input/output terminal (T1), and a second end is connected to the second input/output terminal (T2); and second coils (L12, L22) in which a third end is connected to the second input/output terminal (T2) and a fourth end is connected to a ground terminal (GND), the second coils (L12, L22) being electromagnetically coupled to the first coils (L11, L21). The self-resonant frequency of the impedance matching element (101) is within the communication frequency band by the power feed circuit (30).

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Inventors:

TACHIBANA SHINYA (JP)

Application Number:

PCT/JP2021/000057

Publication Date:

December 02, 2021

Filing Date:

January 05, 2021

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Assignee:

MURATA MANUFACTURING CO (JP)

International Classes:

H01F17/00; H03H7/38; H04B5/02

Domestic Patent References:

WO2012153691A1	2012-11-15
WO2015064138A1	2015-05-07

Foreign References:

JP2016123132A

2016-07-07

Attorney, Agent or Firm:

KAEDE PATENT ATTORNEYS' OFFICE (JP)

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