Wireless communication device

Patent metadata

Field	Value
Publication number	US-9634376-B2
Application number	US-201514723486-A
Country	US
Kind code	B2
Filing date	May 28, 2015
Priority date	Jan 5, 2011
Publication date	Apr 25, 2017
Grant date	Apr 25, 2017

Abstract

A compact wireless communication includes a first radiating element and a second radiating element, which define and function as a dipole antenna, a feeder circuit including a wireless IC chip coupled with the first and second radiating elements, and a feeder substrate that is provided with the wireless IC chip. The first radiating element is provided to the feeder substrate. The second radiating element is provided to a substrate other than the feeder substrate.

First claim

What is claimed is:

1. A wireless communication device, comprising:
a feeder circuit that includes first and second input/output electrodes;
a first radiating element, one end of the first radiating element being connected to the first input/output electrode;
a second radiating element connected to the second input/output electrode;
a feeder substrate provided with the feeder circuit; and
a substrate on which the feeder substrate is mounted; wherein
the first radiating element is provided on the feeder circuit;
the second radiating element is provided on the substrate; and
when viewed in a plan view in a direction perpendicular to a principal surface of the feeder substrate, the first radiating element and the second radiating element are provided at opposite sides of the feeder circuit.

2. The wireless communication device according to claim 1 , wherein the feeder substrate includes a feeder terminal configured to connect the feeder circuit to the second radiating element.

3. The wireless communication device according to claim 2 , wherein the feeder terminal and the second radiating element are coupled via a capacitance.

4. The wireless communication device according to claim 1 , wherein
a matching circuit is connected between the feeder circuit and the second radiating element; and
the matching circuit is provided on the feeder substrate.

5. The wireless communication device according to claim 4 , wherein the matching circuit includes two inductors electromagnetically coupled to each other.

6. The wireless communication device according to claim 4 , wherein the matching circuit includes an inductor connected between the first radiating element and the second radiating element.

7. The wireless communication device according to claim 1 , wherein the feeder circuit is configured to function as a wireless IC chip for processing a high-frequency signal.

8. The wireless communication device according to claim 1 , wherein
the substrate is an article; and
the feeder substrate is bonded to the article.

Assignees

• Murata Manufacturing Co

Inventors

• Kimura Ikuhei
• Ikemoto Nobuo

Classifications

• G06K19/07773

  Antenna details (antennas for wireless devices, e.g. RFID tags, in general H01Q1/22) · CPC title

• G06K19/07794

  the record carrier comprising a booster or auxiliary antenna in addition to the antenna connected directly to the integrated circuit · CPC title

• H01Q1/38

  formed by a conductive layer on an insulating support {(patch antennas H01Q9/0407; microstrip dipole antennas H01Q9/065; microstrip slot antennas H01Q13/106; transmission line microstrip antennas H01Q13/206; manufacturing reflecting surfaces using insulating material for supporting the reflecting surface  H01Q15/142)} · CPC title

• G06K19/07784

  the inductive antenna consisting of a plurality of coils stacked on top of one another · CPC title

• H01Q1/50

  Structural association of antennas with earthing switches, lead-in devices or lightning protectors · CPC title