Wireless communication apparatus and control method therefor

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.

What is claimed is:  
     
       1. A wireless communication apparatus, comprising:
 a plurality of antennas which are arranged so as to be predetermined distances apart from each other within the wireless communication apparatus; 
 a communication unit which perform communication using an antenna selected from the plurality of antennas; 
 a first switching unit which switches the antenna used for the communication to another antenna from the plurality of antennas, if a first state in which a reflected power of a transmitted output power of the selected antenna is larger than a first predetermined threshold value continues for equal to or more than a first predetermined time; and 
 a second switching unit which switches the antenna used for the communication to another antenna from the plurality of antennas, if a second state in which a variation of a received power of the selected antenna is larger than a second predetermined threshold value continues for equal to or more than a second predetermined time, 
 wherein the first predetermined time is shorter than the second predetermined time. 
 
     
     
       2. The apparatus according to  claim 1 , further comprising, a received power detection unit which detects received power received by an antenna selected from the plurality of antennas. 
     
     
       3. The apparatus according to  claim 1 , further comprising, a reflected power detection unit which detests transmitted reflected power of the selected antenna. 
     
     
       4. The apparatus according to  claim 1 , further comprising, sensors which detect contact of an object on a housing of the wireless communication apparatus; and
 a third switching unit which switches the antenna used for the communication to another antenna from the plurality of antennas, if distance between the antenna used for the communication and a position where contact of an object is detected by the sensor is not more than a predetermined distance. 
 
     
     
       5. 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 the antenna used for communication to another antenna from the plurality of antennas, if a first state in which a reflected power of a transmitted output power of the selected antenna is larger than a first predetermined threshold value continues for equal to or more than a first predetermined time; and 
 a step of switching the antenna used for the communication to another antenna from the plurality of antennas, if a second state in which a variation of a received power of the selected antenna is larger than a second predetermined threshold value continues for equal to or more than a second predetermined time, 
 wherein the first predetermined time is shorter than the second predetermined time. 
 
     
     
       6. A non-transitory computer-readable recording medium recording a program for causing a computer of a wireless communication apparatus to:
 switch the antenna used for communication to another antenna from the plurality of antennas, if a first state in which a reflected power of a transmitted output power of the selected antenna is larger than a first predetermined threshold value continues for equal to or more than a first predetermined time; and 
 switch the antenna used for the communication to another antenna from the plurality of antennas, if a second state in which a variation of a received power of the selected antenna is larger than a second predetermined threshold value continues for equal to or more than a second predetermined time, 
 wherein the first predetermined time is shorter than the second predetermined time.