# US 11,309,640 B2 · Wireless communication device

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- Number: US 11,309,640 B2
- Document ID: US11309640B2
- Status: Granted
- Kind: B2
- Application number: 17/101,344
- Filed: 2020-11-23
- Published: 2021-03-11
- Granted: 2022-04-19
- Earliest claimed: 2015-12-18
- Assignees: Yamaha Corporation
- Applicants: Yamaha Corporation
- Inventors: Tomohiro Shinkawa; Hisanobu Suzuki
- Web page: https://patentgrep.com/patent/US11309640B2

## CPC

- H01Q 21/245: {provided with means for varying the polarisation (polarising devices H01Q15/24; tracking by comparing linear polarisation compounds G01S3/146; reducing depolarisation effects H04B7/00; polarisation diversity H04B7/10)}
- H01Q 1/2291: {used in Bluetooth® or Wi-Fi® devices of Wireless Local Area Networks [WLAN] (H01Q1/241 takes precedence; WLAN in general H04W)}
- H01Q 1/245: {with means for shaping the antenna pattern, e.g. in order to protect user against rf exposure}
- H01Q 1/38: 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)}
- H01Q 15/14: Reflecting surfaces; Equivalent structures {(electromagnetic shields H01Q1/526)}
- H01Q 19/10: using reflecting surfaces
- H04B 1/38: Transceivers, i.e. devices in which transmitter and receiver form a structural unit and in which at least one part is used for functions of transmitting and receiving
- H04B 1/3888: Arrangements for carrying or protecting transceivers
- H04B 1/40: Circuits
- H04L 69/18: Multiprotocol handlers, e.g. single devices capable of handling multiple protocols
- H01Q: ANTENNAS, i.e. RADIO AERIALS (radiators or antennas for microwave heating H05B6/72)
- H04B: TRANSMISSION
- H04L: TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION (arrangements common to telegraphic and telephonic communication H04M)

## Abstract

A wireless communication device includes a housing, a substrate provided inside the housing, an antenna provided on the substrate, a switching unit configured to switch directivity of the antenna between a first state and a second state, a detection unit configured to detect switching of the switching unit, and an output unit configured to output a detection result of the detection unit.

## Claims

### Claim 1

A wireless communication device comprising:
a housing;
a substrate provided inside the housing;
an antenna provided on the substrate;
a switching unit configured to switch directivity of the antenna between a first state and a second state;
a detection unit configured to detect switching of the switching unit; and
an output unit configured to output a detection result of the detection unit.

### Claim 2 (depends on 1)

The wireless communication device according to claim 1, wherein the directivity of the antenna in the first state is lower than that of the antenna in the second state.

### Claim 3 (depends on 1)

The wireless communication device according to claim 1, wherein the antenna is provided in plural on the substrate.

### Claim 4 (depends on 1)

The wireless communication device according to claim 1, further comprising a control unit configured to control an operation mode based on the detection result output by the output unit.

### Claim 5 (depends on 4)

The wireless communication device according to claim 4, wherein the control unit is configured to lower an output power of the antenna.

### Claim 6 (depends on 1)

The wireless communication device according to claim 1, wherein the antenna is configured to send a result detected by the detection unit to a receiver side.

### Claim 7 (depends on 1)

The wireless communication device according to claim 1, wherein the detection unit is provided on an upper surface of the housing.

### Claim 8 (depends on 4)

The wireless communication device according to claim 4, wherein the control unit is configured to set a threshold value of a receiver sensitivity of a signal received from a communication partner terminal based on the detection result output by the output unit.