Direction estimating device that estimates radiowave arriving direction, direction estimating method, flying device, flying method, and non-transitory recording medium

A direction estimating method comprising:

• obtaining a received signal strength indication (RSSI) of a radiowave received by a plurality of antennas placed on a first surface of a board of a direction estimating device to have different main lobe directions of directivities, and by at least one antenna placed on a second surface of the board of the direction estimating device that is different from the first surface, the second surface being parallel to the first surface;
• preventing, by a shield plate that is embedded in the board and sandwiched by the first and second surfaces, the radiowave from arriving from a backward side of the first surface and the second surface, wherein the shield plate is parallel to the first and second surfaces and has a same area as the first and second surfaces;
• and
• estimating an arriving direction of the radiowave based on the obtained RSSI of the radiowave,
• wherein the first surface of the direction estimating device is configured to face a user;
• wherein the plurality of antennas are higher than the first surface, and the at least one antenna is lower than the second surface;
• and
• wherein a number of antennas on the first surface is greater than a number of antennas on the second surface.

A non-transitory recording medium having stored therein a program which, when executed by a computer of a direction estimating device, controls the computer to perform operations comprising:

• obtaining a received signal strength indication (RSSI) of a radiowave received by a plurality of antennas placed on a first surface of a board of the direction estimating device to have different main lobe directions of directivities, and by at least one antenna placed on a second surface of the board of the direction estimating device that is different from the first surface, the second surface being parallel to the first surface;
• and
• estimating an arriving direction of the radiowave based on the obtained RSSI of the radiowave;
• wherein the first surface of the direction estimating device is configured to face a user;
• wherein the plurality of antennas are higher than the first surface, and the at least one antenna is lower than the second surface;
• wherein the direction estimating device comprises a shield plate that is embedded in the board and sandwiched by the first and second surfaces, wherein the shield plate is parallel to the first and second surfaces, has a same area as the first and second surfaces, and prevents the radiowave from arriving from a backward side of the first surface and the second surface;
• and
• wherein a number of antennas on the first surface is greater than a number of antennas on the second surface.