Electronic device, control method of electronic device, and control program of electronic device

1. An electronic device comprising:

a plurality of transmission antennas installed in a mobile body; and

a controller configured to:

switch between a first mode of transmitting first transmission waves from the transmission antennas and a second mode of transmitting second transmission waves beamformed from the transmission antennas; and

perform control to cause a beam width of the transmission waves transmitted in the second mode to be narrower in azimuth than a beam width of the transmission waves transmitted in the first mode,

wherein the controller is configured to switch from the first mode to the second mode, when a process for detecting a stop space for the mobile body has started,

the controller is configured to perform control to switch between the first mode and the second mode, after switching to the second mode, and

the controller is configured to perform control to cause an operation time in the first mode to be shorter than an operation time in the second mode, after switching to the second mode.

2. The electronic device according to claim 1 , wherein the controller is configured to perform control to not beamform the transmission waves transmitted from the transmission antennas in the first mode.

3. The electronic device according to claim 1 , wherein the controller is configured to perform control to detect a certain object around the mobile body based on a result of receiving, by a reception antenna, reflected waves resulting from reflection of the transmission waves transmitted in the first mode.

4. The electronic device according to claim 1 , wherein the controller is configured to perform control to detect the stop space based on a result of receiving, by a reception antenna, reflected waves resulting from reflection of the transmission waves transmitted in the second mode.

5. The electronic device according to claim 1 , wherein the controller is configured to perform control to aim a beam of the transmission waves transmitted in the second mode, in a direction in which the stop space is detected.

6. The electronic device according to claim 1 , wherein the controller is configured to perform control to switch from the second mode to the first mode for each predetermined cycle.

7. The electronic device according to claim 1 , wherein the controller is configured to perform control to switch from the second mode to the first mode, after the stop space for the mobile body is detected.

8. A control method of an electronic device, the control method comprising:

transmitting first transmission waves from a plurality of transmission antennas installed in a mobile body;

transmitting second transmission waves beamformed from the transmission antennas;

performing control to cause a beam width of the second transmission waves to be narrower in azimuth than a beam width of the first transmission waves;

performing control to switch from the transmitting of the first transmission waves to the transmitting of the second transmission waves, when a process for detecting a stop space for the mobile body has started,

wherein the method comprises performing control to switch between the transmitting of the first transmission waves and the transmitting of the second transmission waves, after switching to the transmitting of the second transmission waves, and

the method comprises performing control to cause an operation time of the transmitting of the first transmission waves to be shorter than an operation time of the transmitting of the second transmission waves, after switching to the transmitting of the second transmission waves.

9. A non-transitory computer-readable recording medium storing computer program instructions, which when executed by an electronic device, cause a computer to:

transmit first transmission waves from a plurality of transmission antennas installed in a mobile body;

transmit second transmission waves beamformed from the transmission antennas;

performing control to cause a beam width of the second transmission waves to be narrower in azimuth than a beam width of the first transmission waves; and

perform control to switch from the transmitting of the first transmission waves to the transmitting of the second transmission waves, when a process for detecting a stop space for the mobile body has started,

wherein the instructions cause the computer to perform control to switch between the transmitting of the first transmission waves and the transmitting of the second transmission waves, after switching to the transmitting of the second transmission waves, and

the instructions cause the computer to perform control to cause an operation time of the transmitting of the first transmission waves to be shorter than an operation time of the transmitting of the second transmission waves, after switching to the transmitting of the second transmission waves.