US 2017/0324158 A1Published application

Impedance conversion element and communication device

AssigneeMurata Manufacturing Co., Ltd.

InventorsHisashi AKIYAMA, Kenichi ISHIZUKA

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Abstract

A first end of a first conductor pattern of a first coil conductor is connected to a power supply terminal, and a second end of the first conductor pattern is connected to an antenna terminal. A second conductor pattern includes second coil conductors. A first end of the second conductor pattern is connected to the antenna terminal and the second end of the first conductor pattern, and a second end of the second conductor pattern is connected to a ground terminal. The second conductor pattern magnetically couples with the first conductor pattern. The second end of the first conductor pattern and the first end of the second conductor pattern are connected to the antenna terminal via a routing pattern that extends to magnetically couple with at least either the first conductor pattern or the second conductor pattern.

Claims19

Dependent claims

An impedance conversion element comprising:

a multilayer body including a plurality of laminated insulating layers;
an antenna terminal provided on a surface of the multilayer body and connected to an antenna element;
a power supply terminal provided on the surface of the multilayer body and connected to a power supply circuit;
a ground terminal provided on the surface of the multilayer body and connected to ground;
a first conductor pattern provided within the multilayer body and including a first end connected to the power supply terminal, a second end connected to the antenna terminal, and a loop-shaped portion;
a second conductor pattern provided within the multilayer body and including a first end connected to the antenna terminal and the second end of the first conductor pattern, a second end connected to the ground terminal and magnetically coupled with the first conductor pattern, and a loop-shaped portion;
and
a routing pattern that connects the second end of the first conductor pattern and the first end of the second conductor pattern to the antenna terminal;
wherein
the routing pattern extends to magnetically couple with at least either the first conductor pattern or the second conductor pattern.

7 more elements

A communication device comprising:

an impedance conversion element;
an antenna element;
and
a power supply circuit;
wherein
the impedance conversion element includes:
a multilayer body including a plurality of laminated insulating layers;
an antenna terminal provided on a surface of the multilayer body;
a power supply terminal provided on the surface of the multilayer body;
a ground terminal provided on the surface of the multilayer body and connected to ground;
a first conductor pattern provided within the multilayer body and including a first end connected to the power supply terminal, a second end connected to the antenna terminal, and a loop-shaped portion;
a second conductor pattern provided within the multilayer body and including a first end connected to the antenna terminal and the second end of the first conductor pattern, a second end connected to the ground terminal and magnetically coupled with the first conductor pattern, and a loop-shaped portion;
and
a routing pattern that connects the second end of the first conductor pattern and the first end of the second conductor pattern to the antenna terminal;
wherein
the routing pattern extends to magnetically couple with at least either the first conductor pattern or the second conductor pattern;
the antenna element is connected to the antenna terminal;
and
the power supply circuit is connected to the power supply terminal.

16 more elements

Dependencies are inferred from the claim text.

Facts

Application: 15/662,325Filed 28 Jul 2017
Priority: JP 2015-04809911 Mar 2015
Published: 9 Nov 2017
Term ends: Not estimatedThe source records don’t support an estimate.

Classification7 codes

H01Q 1/50
Details of, or arrangements associated with, antennas: structural association of antennas with earthing switches, lead-in devices or lightning…
H01Q 5/50
Arrangements for simultaneous operation of antennas on two or more different wavebands, e.g. dual-band or multi-band arrangements: feeding or…
H01Q 7/00
Loop antennas with a substantially uniform current distribution around the loop and
H01Q 1/243
Specially adapted for hand-held use: with built-in antennas