# US 2013/0157586 A1 · Wireless communication apparatus and control method therefor

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- Number: US 2013/0157586 A1
- Document ID: US20130157586A1
- Status: Published application
- Kind: A1
- Application number: 13/691,168
- Filed: 2012-11-30
- Published: 2013-06-20
- Earliest claimed: 2011-12-16
- Assignees: Canon Kabushiki Kaisha
- Inventors: Katsuo Saito
- Web page: https://patentgrep.com/patent/US20130157586A1

## CPC

- H04B 1/40: Circuits
- H04B 7/0814: {based on current reception conditions, e.g. switching to different antenna when signal level is below threshold}
- H04B: TRANSMISSION

## Abstract

A wireless communication apparatus for performing wireless communication using an antenna selected from a plurality of antennas. A received power detection unit detects received power received by an antenna selected from the plurality of antennas. A reflected power detection unit detects transmitted reflected power of the selected antenna. A switching unit switches an antenna used for communication to another antenna based on a variation of the received power detected by the received power detection unit and an amount of electric power of the reflected power detected by the reflected power detection unit.

## Claims

### Claim 1

A wireless communication apparatus for performing wireless communication using an antenna selected from a plurality of antennas comprising:
a received power detection unit which detects received power received by an antenna selected from the plurality of antennas;
a reflected power detection unit which detects transmitted reflected power of the selected antenna; and
a switching unit which switches an antenna used for communication to another antenna based on a variation of the received power detected by the received power detection unit and an amount of electric power of the reflected power detected by the reflected power detection unit.

### Claim 2 (depends on 1)

The apparatus according to claim 1, wherein when the variation of the received power detected by the received power detection unit exceeds a first threshold, the switching unit switches the antenna used for communication to another antenna.

### Claim 3 (depends on 1)

The apparatus according to claim 1, wherein when the reflected power detected by the reflected power detection unit exceeds a second threshold, the switching unit switches the antenna used for communication to another antenna.

### Claim 4 (depends on 1)

The apparatus according to claim 1, further comprising
a contact detection unit which detects contact of an object at a predetermined position from the selected antenna on a housing of the wireless communication apparatus,
wherein when the contact detection unit detects contact of an object, the switching unit switches the antenna used for communication to another antenna.

### Claim 5

A wireless communication apparatus for performing wireless communication using an antenna selected from a plurality of antennas comprising:
a received power detection unit which detects received power received by an antenna selected from the plurality of antennas;
a contact detection unit which detects contact of an object at a predetermined position from the selected antenna on a housing of the wireless communication apparatus; and
a switching unit which switches an antenna used for communication to another antenna based on a variation of the received power detected by the received power detection unit and a contact detection result of the contact detection unit.

### Claim 6

A control method for a wireless communication apparatus for performing wireless communication using an antenna selected from a plurality of antennas comprising:
a step of switching a selected antenna to another antenna based on a variation of received power received by the selected antenna and an amount of electric power of transmitted reflected power of the selected antenna.

### Claim 7

A control method for a wireless communication apparatus for performing wireless communication using an antenna selected from a plurality of antennas comprising:
a step of switching an antenna used for communication to another antenna based on a variation of received power received by a selected antenna and a detection result of detecting contact of an object at a predetermined position from the selected antenna on a housing of the wireless communication apparatus.

### Claim 8 (depends on 6)

A non-transitory computer-readable recording medium recording a program for causing a computer to execute each step of a control method according to claim 6.

### Claim 9 (depends on 7)

A non-transitory computer-readable recording medium recording a program for causing a computer to execute each step of a control method according to claim 7.