System, Information Processing Apparatus, Program, and Method

Abstract

A system is provided that includes a first antenna device having a plate-shaped first reflector that reflects and emits radio waves radiated by a radio wave radiation unit, and a first angle changing unit that changes a first rotation angle of the first reflector; a second antenna device having a plate-shaped second reflector that reflects radio waves, and a second angle changing unit that changes a second rotation angle of the second reflector; and an information processing device that determines radio waves transmitted by the first antenna device when the rotation angle of the first reflector is a first measurement angle and received by the second antenna device when the rotation angle of the second reflector is a reception target rotation angle, based on a plurality of measurement data measured by reflecting, by the second reflectors at a plurality of second measurement angles, radio waves transmitted by the first antenna device when the second antenna device is reflected by the first reflector at the first measurement angle.

Description

Technical Field

[0001] The present invention relates to a system, an information processing apparatus, a program, and a method.

Background Art

[0002] Patent Document 1 describes a technique for specifying a combination of an emission direction and a reception directivity of radio waves in the terahertz wave band. Patent Document 2 describes a technique for changing the polarization of radio waves according to adjustment of a reflection part of an antenna device. Patent Document 3 describes an antenna device configured such that, in a reflector-type antenna device that performs azimuth scanning with a rotation drive device, an electrical movable contact is eliminated and a primary radiator does not shield a radio wave path between a reflector and free space. Non-Patent Document 1 describes a technique for applying a synthetic aperture type arrival direction measurement method to a measurement method using a rotating reflector. [Prior Art Documents] [Patent Documents] [Patent Document 1] Japanese Patent No. 7246537 [Patent Document 2] Patent No. 7301911 [Patent Document 3] Japanese Unexamined Patent Application Publication No. 2007-251664 [Non-Patent Documents] "Non-Patent Document 1" by Ryō Yamaguchi and Kazuma Toyomoto, "Examination of Synthetic Aperture Type Arrival Direction Measurement Method Using a Rotating Reflector - Concave Arc Virtual Array Synthesis Beam Generation Method by Primary Radiator Mirror Image -", Institute of Electronics, Information and Communication Engineers, December 2020, pp. 29-32

Summary of the Invention

Means for Solving the Problems

[0003] According to an embodiment of the present invention, a system is provided. The system includes a radio wave radiation unit that radiates radio waves in the terahertz band or the high SHF (Super High Frequency) band, a first reflection unit that reflects the radio waves radiated by the radio wave radiation unit and emits them to the outside and has a plate-like shape, a mounting unit that mounts the radio wave radiation unit and the first reflection unit, and a first angle changing unit that changes the rotation angle of the first reflection unit when the first reflection unit reflects the radio waves radiated by the radio wave radiation unit by rotating and moving the mounting unit around the radio wave radiation unit. The system may include a first antenna device having the above components. The system may further include a radio wave receiving unit, a second reflection unit that reflects radio waves from the outside and has a plate-like shape, and a second angle changing unit that changes the rotation angle of the second reflection unit when the second reflection unit reflects radio waves from the outside by rotating and moving the second reflection unit with respect to the radio wave receiving unit. The system may include a second antenna device having the above components. The system may further include an information processing device having an acquisition unit that acquires a plurality of measurement data measured by reflecting the radio waves emitted by the first antenna device at a first measurement angle of the first reflection unit and received by reflecting them at the second reflection unit at a plurality of second measurement angles, and a determination unit that determines the radio waves received by the second antenna device when the rotation angle of the first reflection unit is the first measurement angle and the rotation angle of the second reflection unit is a reception target rotation angle not included in the plurality of second measurement angles, based on the plurality of measurement data.

[0004] In the system, the acquisition unit may acquire the plurality of measurement data measured by reflecting, by the second reflection unit at each of the plurality of second measurement angles, the radio wave emitted by the first antenna device when the second antenna device is reflected by the first reflection unit at each of the plurality of first measurement angles, and the determination unit may determine, based on the plurality of measurement data, the radio wave emitted by the first antenna device when the rotation angle of the first reflection unit is each of the plurality of first measurement angles and received by the second antenna device when the rotation angle of the second reflection unit is the reception target rotation angle.

[0005] In any of the systems, the acquisition unit may acquire the plurality of measurement data measured by reflecting, by the second reflection unit at each of the plurality of second measurement angles, the radio wave emitted by the first antenna device when the second antenna device is reflected by the first reflection unit at each of the plurality of first measurement angles, and the determination unit may determine, based on the plurality of measurement data, the radio wave emitted by the first antenna device when the rotation angle of the first reflection unit is an emission target rotation angle not included in the plurality of first measurement angles and received by the second antenna device when the rotation angle of the second reflection unit is the reception target rotation angle.

[0006] In any of the systems, the determination unit may determine, based on the radio wave when synthesizing the radio wave emitted by the first antenna device when the rotation angle of the first reflection unit is each of the plurality of first measurement angles and received by the second antenna device when the rotation angle of the second reflection unit is each of the plurality of second measurement angles, the radio wave emitted by the first antenna device when the rotation angle of the first reflection unit is the emission target rotation angle and received by the second antenna device when the rotation angle of the second reflection unit is the reception target rotation angle.

[0007] In any of the above systems, the determination unit may determine the radio waves radiated by the radio wave radiating unit, reflected by the first reflector, and emitted to the outside, as radio waves emitted by a first virtual antenna located at a position symmetric to the position of the radio wave radiating unit with respect to the first reflector, and may determine the radio waves reflected by the second reflector and received by the radio wave receiving unit, as radio waves received by a second virtual antenna located at a position symmetric to the position of the radio wave receiving unit with respect to the second reflector, by performing synthetic aperture processing on each of the openings of the radio wave radiating unit and the radio wave receiving unit based on the plurality of measurement data, and thereby determine the radio waves emitted by the first antenna device when the rotation angle of the first reflector is the emission target rotation angle and received by the second antenna device when the rotation angle of the second reflector is the reception target rotation angle.

[0008] In any of the above systems, the determination unit may perform the synthetic aperture processing on each of the openings of the radio wave radiating unit and the radio wave receiving unit by using the following mathematical formula.

[0009]

Equation

[0010]

Equation

[0011] In any of the systems, the second angle changing unit may rotate the second reflecting unit with respect to the radio wave receiving unit so that the second reflecting unit reflects the radio wave emitted by the first antenna device at the plurality of second measurement angles at a predetermined second angular interval, and the determining unit may determine the radio wave emitted by the first antenna device when the rotation angle of the first reflecting unit is the first measurement angle and received by the second antenna device when the rotation angle of the second reflecting unit is each of the received target rotation angles at a plurality of received target rotation angles at a predetermined third angular interval.

[0012] In any of the systems, the third angular interval may be an angular interval shorter than the second angular interval.

[0013] In any of the systems, the determining unit is based on the electric field strength of the radio wave emitted by the first antenna device when the rotation angle of the first reflecting unit is each of the plurality of first measurement angles and received by the second antenna device when the rotation angle of the second reflecting unit is each of the plurality of second measurement angles, and the electric field strength of the radio wave emitted by the first antenna device when the rotation angle of the first reflecting unit is each of the plurality of first measurement angles and received by the second antenna device when the rotation angle of the second reflecting unit is each of the plurality of received target rotation angles, and may determine a combination of the rotation angle of the first reflecting unit and the rotation angle of the second reflecting unit when the radio wave emitted by the first antenna device arrives at the second antenna device with the maximum electric field strength.

[0014] According to an embodiment of the present invention, an information processing apparatus is provided. The information processing apparatus includes a radio wave receiving unit, a second reflecting unit that reflects radio waves from the outside and has a plate-like shape, and a second angle changing unit that changes the rotation angle of the second reflecting unit when the second reflecting unit reflects radio waves from the outside by rotating the second reflecting unit relative to the radio wave receiving unit. A second antenna device, a radio wave radiating unit that radiates radio waves in the terahertz band or the high SHF band, a first reflecting unit that reflects the radio waves radiated by the radio wave radiating unit and emits them to the outside and has a plate-like shape, a mounting unit on which the radio wave radiating unit and the first reflecting unit are mounted, and a first angle changing unit that changes the rotation angle of the first reflecting unit when the first reflecting unit reflects the radio waves radiated by the radio wave radiating unit by rotating the mounting unit around the radio wave radiating unit. An acquisition unit that acquires a plurality of measurement data measured by reflecting the radio waves emitted by being reflected by the first reflecting unit at the first measurement angle by the first antenna device and receiving them by reflecting them by the second reflecting unit at a plurality of second measurement angles may be provided. The information processing apparatus may include a determination unit that determines radio waves emitted by the first antenna device when the rotation angle of the first reflecting unit is the first measurement angle and received by the second antenna device when the rotation angle of the second reflecting unit is a reception target rotation angle not included in the plurality of second measurement angles based on the plurality of measurement data.

[0015] According to an embodiment of the present invention, a computer is provided with a radio wave receiving unit, a second reflecting unit that reflects radio waves from the outside and has a plate-like shape, and a second angle changing unit that changes the rotation angle of the second reflecting unit when the second reflecting unit reflects radio waves from the outside by rotating the second reflecting unit relative to the radio wave receiving unit. A second antenna device having: a radio wave radiating unit that radiates radio waves in the terahertz band or the high SHF band; a first reflecting unit that reflects the radio waves radiated by the radio wave radiating unit and emits them to the outside and has a plate-like shape; a mounting unit that mounts the radio wave radiating unit and the first reflecting unit; and a first angle changing unit that changes the rotation angle of the first reflecting unit when the first reflecting unit reflects the radio waves radiated by the radio wave radiating unit by rotating the mounting unit around the radio wave radiating unit. An acquisition procedure for acquiring a plurality of measurement data measured by reflecting and receiving radio waves emitted by being reflected by the first reflecting unit at the first measurement angle by the first antenna device and then reflected by the second reflecting unit at a plurality of second measurement angles; and a determination procedure for determining radio waves emitted by the first antenna device when the rotation angle of the first reflecting unit is the first measurement angle and received by the second antenna device when the rotation angle of the second reflecting unit is a reception target rotation angle not included in the plurality of second measurement angles based on the plurality of measurement data. A program for executing the above is provided.

[0016] According to one embodiment of the present invention, there is provided a radio wave radiation unit that radiates radio waves in the terahertz band or the high SHF band, a first reflection unit that reflects the radio waves radiated by the radio wave radiation unit and emits them to the outside and has a plate-like shape, a mounting unit that mounts the radio wave radiation unit and the first reflection unit, and a first angle changing unit that changes the rotation angle of the first reflection unit when the first reflection unit reflects the radio waves radiated by the radio wave radiation unit by rotating and moving the mounting unit around the radio wave radiation unit. There is provided a method executed by a system including a first antenna device, a radio wave receiving unit, a second reflection unit that reflects radio waves from the outside and has a plate-like shape, and a second angle changing unit that changes the rotation angle of the second reflection unit when the second reflection unit reflects radio waves from the outside by rotating and moving the second reflection unit with respect to the radio wave receiving unit. The method may include a receiving step in which the second antenna device receives radio waves emitted by the first antenna device and reflected by the first reflection unit at a first measurement angle and then reflected by the second reflection unit at a plurality of second measurement angles. The method may include an acquisition step in which the information processing device acquires a plurality of measurement data measured by the second antenna device receiving radio waves emitted by the first antenna device and reflected by the first reflection unit at the first measurement angle and then reflected by the second reflection unit at the plurality of second measurement angles in the receiving step. The method may include a determination step in which the information processing device determines radio waves received by the second antenna device when the rotation angle of the first reflection unit is the first measurement angle and the rotation angle of the second reflection unit is a reception target rotation angle not included in the plurality of second measurement angles, based on the plurality of measurement data acquired in the acquisition step.

[0017] Note that the above summary of the invention does not list all the necessary features of the present invention. Also, sub-combinations of these feature groups can also be inventions.

Brief Description of Drawings

[0018]

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Best Mode for Carrying Out the Invention

[0019] The applicant has developed a so-called "rotating reflector antenna" that fixes a primary radiator and rotates a parabolic reflector. The rotating reflector antenna has a mechanism that can rotate the reflector at high speed infinitely, and it is possible to realize high-speed directional scanning using the rotating reflector antenna. However, when finely detecting the arrival direction of the beam, the measurement angle interval of the rotating reflector antenna must be made finer. As a result, the measurement speed decreases. Also, when narrowing the beam width of the beam, a large-aperture parabolic antenna must be prepared, and there may be cases where a large-aperture parabolic antenna cannot be created due to the processing limitations of the processing machine. In the system according to this embodiment, for example, primary radiators are fixed on the transmission side and the reception side, an antenna with a planar reflector that can rotate is prepared, rotational measurements are performed on both the transmission side and the reception side, and then a synthetic aperture process using the measurement data is executed offline.

[0020] Hereinafter, the present invention will be described through embodiments of the invention. However, the following embodiments do not limit the invention according to the claims. Also, not all combinations of features described in the embodiments are essential for the solution means of the invention.

[0021] FIG. 1 schematically shows an example of the system 10. The system 10 may include an antenna device 100. The system 10 may include an antenna device 200. The system 10 may include an information processing device 300. The system 10 may include an angle controller 400. The system 10 may include a VNA 500.

[0022] The antenna device 100 is an antenna device that emits radio waves. The antenna device 100 has, for example, a radio wave radiation unit 102, a reflection unit 104, a support unit 106, a mounting unit 107, and an angle changing unit 108. The antenna device 100 may be an example of a first antenna device.

[0023] The radio wave radiation unit 102 radiates radio waves. The radio wave radiation unit 102 radiates radio waves, for example, by emitting a beam. The radio wave radiation unit 102 is, for example, an antenna capable of radiating radio waves of orthogonal polarization.

[0024] The radio wave radiation unit 102 radiates radio waves in the terahertz band, for example. The radio waves in the terahertz band may be radio waves in a frequency band from 100 GHz to 10 THz.

[0025] The radio wave radiation unit 102 may radiate radio waves in the high SHF band. The radio waves in the high SHF band may be radio waves in a frequency band from 6 GHz to 30 GHz.

[0026] The reflection unit 104 reflects the radio waves radiated by the radio wave radiation unit 102 and emits them to the outside. The reflection unit 104 may be an example of a first reflection unit.

[0027] The reflection unit 104 has a plate-like shape, for example. The reflection unit 104 has a flat reflection surface for reflecting radio waves, for example. The reflection unit 104 is a plane reflector, for example.

[0028] The reflection unit 104 may be any member as long as it can reflect radio waves. The reflection unit 104 is a mirror, for example. The reflection unit 104 is a plane mirror, for example.

[0029] The support unit 106 supports the reflection unit 104. The reflection unit 104 and the support unit 106 may be integrated or may be different members.

[0030] The mounting unit 107 mounts the radio wave radiation unit 102 and the reflection unit 104. The mounting unit 107 and the support unit 106 may be integrated or may be different members.

[0031] The angle changing unit 108 rotates the mounting unit 107. By the rotational movement of the mounting unit 107, the reflecting unit 104 mounted on the mounting unit 107 rotates. Also, by the rotational movement of the mounting unit 107, the radio wave radiating unit 102 mounted on the mounting unit 107 rotates. The angle changing unit 108 is, for example, a turntable. The angle changing unit 108 may be an example of a first angle changing unit.

[0032] The angle changing unit 108 changes, for example, the rotation angle of the reflecting unit 104 when the reflecting unit 104 reflects the radio wave radiated by the radio wave radiating unit 102 by rotating the mounting unit 107 around the radio wave radiating unit 102. Incidentally, the rotation angle of the reflecting unit 104 when the reflecting unit 104 reflects the radio wave radiated by the radio wave radiating unit 102 may be described as a first rotation angle. The angle changing unit 108 rotates, for example, the mounting unit 107 around the radio wave radiating unit 102 so that the reflecting unit 104 reflects the radio wave radiated by the radio wave radiating unit 102 at a plurality of first rotation angles (which may be described as first measurement angles) at a predetermined angular interval.

[0033] The angular interval of the plurality of first measurement angles may be described as a first angular interval. Also, the angular interval of the plurality of first measurement angles may be described as AS (Angular Space). Tx and may be described as. AS Tx is, for example, 2°.

[0034] The angle changing unit 108 rotates, for example, the mounting unit 107 around the radio wave radiating unit 102 one or more times. For example, when the angle changing unit 108 rotates the mounting unit 107 around the radio wave radiating unit 102 only once so that the reflecting unit 104 reflects the radio wave radiated by the radio wave radiating unit 102 at 2° intervals, the reflecting unit 104 reflects the radio wave radiated by the radio wave radiating unit 102 at 180 first measurement angles. The angle changing unit 108 may rotate the mounting unit 107 around the radio wave radiating unit 102 less than once.

[0035] The angle changing unit 108 rotates, for example, about a rotation axis. The rotation axis may be perpendicular to the installation surface of the angle changing unit 108 where the mounting unit 107 is installed. The rotation axis may be perpendicular to the mounting surface of the mounting unit 107 on which the radio wave radiating unit 102 and the support unit 106 are mounted.

[0036] The angle changing unit 108 rotates counterclockwise, for example, about a rotation axis. The angle changing unit 108 may rotate clockwise about the rotation axis.

[0037] The radio wave radiating unit 102 is mounted on the mounting unit 107 such that, for example, the central axis of the radio wave radiating unit 102 perpendicular to the mounting surface of the mounting unit 107 coincides with the rotation axis of the angle changing unit 108. The support unit 106 is mounted on the mounting surface of the mounting unit 107 such that, for example, the support unit 106 is perpendicular to the mounting surface of the mounting unit 107. The support unit 106 supports the reflecting unit 104 such that, for example, the elevation angle of the reflecting unit 104 with respect to the mounting surface of the mounting unit 107 is 45°.

[0038] The antenna device 200 is an antenna device that receives radio waves. The antenna device 200 has, for example, a reflecting unit 202, a radio wave receiving unit 204, a support unit 206, and an angle changing unit 208. The antenna device 200 may be an example of a second antenna device.

[0039] The reflecting unit 202 reflects radio waves from the outside. The reflecting unit 202 reflects, for example, the radio waves emitted by the antenna device 100. The reflecting unit 202 may be an example of a second reflecting unit.

[0040] The reflecting unit 202 has, for example, a plate-like shape. The reflecting unit 202 has, for example, a flat reflecting surface for reflecting radio waves. The reflecting unit 202 is, for example, a flat reflector.

[0041] The reflecting unit 202 may be any member as long as it can reflect radio waves. The reflecting unit 202 is, for example, a mirror. The reflecting unit 202 is, for example, a flat mirror.

[0042] The radio wave receiving unit 204 receives radio waves. The radio wave receiving unit 204 receives, for example, radio waves reflected by the reflecting unit 202. The radio wave receiving unit 204 is, for example, an antenna capable of receiving radio waves of orthogonal polarization.

[0043] The support unit 206 supports the reflecting unit 202. The reflecting unit 202 and the support unit 206 may be integrated or may be different members.

[0044] The angle changing unit 208 rotates and moves the reflecting unit 202. The angle changing unit 208 is, for example, a turntable. The angle changing unit 208 may be an example of a second angle changing unit.

[0045] The angle changing unit 208 changes, for example, the rotation angle of the reflecting unit 202 when the reflecting unit 202 reflects radio waves from the outside by rotating and moving the reflecting unit 202 with respect to the radio wave receiving unit 204. Incidentally, the rotation angle of the reflecting unit 202 when the reflecting unit 202 reflects radio waves from the outside may be described as the second rotation angle. The angle changing unit 208 rotates and moves the reflecting unit 202 with respect to the radio wave receiving unit 204 so that the reflecting unit 202 reflects radio waves emitted by the antenna device 100 at a plurality of second rotation angles (which may be described as second measurement angles) at a predetermined angular interval.

[0046] The angular interval of the plurality of second measurement angles may be described as the second angular interval. Also, the angular interval of the plurality of second measurement angles may be described as AS Rx and may be described as such. AS Rx is, for example, 2°.

[0047] The angle changing unit 208 rotates the reflecting unit 202 by one or more rotations with respect to the radio wave receiving unit 204. For example, when the angle changing unit 208 rotates the reflecting unit 202 by only one rotation with respect to the radio wave receiving unit 204 so that the reflecting unit 202 reflects the radio waves emitted by the antenna device 100 at intervals of 2°, the reflecting unit 202 reflects the radio waves emitted by the antenna device 100 at 180 second measurement angles. The angle changing unit 208 may rotate the reflecting unit 202 by less than one rotation with respect to the radio wave receiving unit 204.

[0048] The angle changing unit 208 rotates about a rotation axis, for example. The rotation axis may be perpendicular to the installation surface of the angle changing unit 208 where the support unit 206 is installed.

[0049] The angle changing unit 208 rotates counterclockwise about the rotation axis, for example. The angle changing unit 208 may rotate clockwise about the rotation axis.

[0050] The radio wave receiving unit 204 is installed in the antenna device 200 so that its position and angle are fixed, for example. The radio wave receiving unit 204 is installed in the antenna device 200 so that the central axis of the radio wave receiving unit 204, which is perpendicular to the installation surface of the angle changing unit 208, coincides with the rotation axis of the angle changing unit 208, for example.

[0051] The support unit 206 is installed on the installation surface of the angle changing unit 208 so that the support unit 206 is perpendicular to the installation surface of the angle changing unit 208, for example. The support unit 206 supports the reflecting unit 202 so that the elevation angle of the reflecting unit 202 with respect to the installation surface of the angle changing unit 208 is 45°, for example.

[0052] The information processing device 300 executes various information processes. The information processing device 300 executes a process for determining the arrival direction of radio waves when the radio waves emitted by the antenna device 100 arrive at the antenna device 200 appropriately, for example.

[0053] The information processing device 300 executes various information processes in cooperation with, for example, the angle controller 400. The information processing device 300 executes various information processes in cooperation with, for example, a VNA (Vector Network Analyzer) 500.

[0054] The angle controller 400 controls the rotation angle of the angle changing unit 208. Note that controlling the rotation angle of the angle changing unit 208 may mean controlling the rotation angle of the reflection unit 202. The angle changing unit 208 may rotate the reflection unit 202 relative to the radio wave receiving unit 204 in accordance with the control by the angle controller 400.

[0055] The angle controller 400 transmits, for example, angle data indicating the rotation angle of the reflection unit 202 to the information processing device 300. The angle controller 400 transmits the angle data to the information processing device 300 via a wired connection, for example. The angle controller 400 may transmit the angle data to the information processing device 300 via a wireless connection.

[0056] The angle controller 400 may control the rotation angle of the angle changing unit 108. Note that controlling the rotation angle of the angle changing unit 108 may mean controlling the rotation angle of the reflection unit 104. The angle changing unit 108 may rotate the mounting unit 107 around the radio wave radiating unit 102 in accordance with the control by the angle controller 400.

[0057] The angle controller 400 transmits, for example, angle data indicating the rotation angle of the reflection unit 104 to the information processing device 300. The angle controller 400 may transmit the angle data indicating the rotation angle of the reflection unit 104 to the information processing device 300 in the same manner as when transmitting the angle data indicating the rotation angle of the reflection unit 202.

[0058] The information processing device 300 may have the functions of the angle controller 400. The information processing device 300 and the angle controller 400 may be integrated. For example, the information processing device 300 may incorporate the angle controller 400.

[0059] The VNA500 measures the electric field strength of the radio wave received by the antenna device 200. For example, when the rotation angle of the reflection unit 104 is the first measurement angle, the VNA500 measures the electric field strength of the radio wave received by the antenna device 200 at the second measurement angle of one reflection unit 202 when the antenna device 200 receives the radio wave emitted by the antenna device 100. For example, when the rotation angle of the reflection unit 104 is the first measurement angle, the VNA500 measures the electric field strength of the radio wave received by the antenna device 200 at a plurality of second measurement angles of the reflection unit 202 when the antenna device 200 receives the radio wave emitted by the antenna device 100. For example, when the rotation angles of the reflection unit 104 are each of the plurality of first measurement angles, the VNA500 measures the electric field strength of the radio wave received by the antenna device 200 at a plurality of second measurement angles of the reflection unit 202 when the antenna device 200 receives the radio wave emitted by the antenna device 100.

[0060] The VNA500 has, for example, two terminals for measuring the electric field strength of the radio wave. In an example shown in FIG. 1, the VNA500 measures the electric field strength of the radio wave with two terminals, terminal 1 and terminal 2.

[0061] For example, in response to receiving a trigger input from the angle controller 400, the VNA500 starts measuring the electric field strength of the radio wave when the antenna device 200 receives the radio wave. In this case, the VNA500 may start measuring the electric field strength of the radio wave when the antenna device 200 receives the radio wave by causing the antenna device 100 to emit the radio wave.

[0062] The VNA500 receives a trigger input from the angle controller 400 via a wired connection, for example. The VNA500 may receive a trigger input from the angle controller 400 via a wireless connection.

[0063] The VNA500 transmits measurement data obtained by measuring the electric field strength of radio waves received by the antenna device 200, for example, to the information processing device 300. The VNA500 transmits the measurement data to the information processing device 300 via a wired connection, for example. The VNA500 may transmit the measurement data to the information processing device 300 via a wireless connection.

[0064] The VNA500 may be replaced with any device capable of measuring the electric field strength of radio waves received by the antenna device 200. The VNA500 may be replaced with, for example, a spectrum analyzer and a signal generator.

[0065] The information processing device 300 may have the functions of the VNA500. The information processing device 300 and the VNA500 may be integrated. For example, the information processing device 300 may incorporate the VNA500.

[0066] The information processing device 300 acquires, for example, measurement data measured by the antenna device 200 receiving radio waves emitted by the antenna device 100 when the rotation angle of the reflecting portion 104 is the first measurement angle at the second measurement angle of one reflecting portion 202. The information processing device 300 acquires, for example, a plurality of measurement data measured by the antenna device 200 receiving radio waves emitted by the antenna device 100 when the rotation angle of the reflecting portion 104 is the first measurement angle at a plurality of second measurement angles of the reflecting portion 202. The information processing device 300 acquires, for example, a plurality of measurement data measured by the antenna device 200 receiving radio waves emitted by the antenna device 100 when the rotation angle of the reflecting portion 104 is each of the plurality of first measurement angles at a plurality of second measurement angles of the reflecting portion 202.

[0067] The information processing apparatus 300 acquires measurement data from, for example, the VNA 500. The information processing apparatus 300 acquires angle data corresponding to the measurement data and indicating the second measurement angle of the reflection unit 202 from, for example, the angle controller 400. The information processing apparatus 300 acquires angle data corresponding to the measurement data and indicating the first measurement angle of the reflection unit 104 from, for example, the angle controller 400.

[0068] The information processing apparatus 300 performs a basis transformation on the measurement data, for example. The information processing apparatus 300 performs a basis transformation on the measurement data based on the angle data corresponding to the measurement data and indicating the second measurement angle of the reflection unit 202, for example.

[0069] The information processing apparatus 300 may regard the radio wave reflected by the reflection unit 104 and radiated to the outside from the radio wave radiated by the radio wave radiating unit 102 as the radio wave radiated by the virtual antenna 150 located at a position symmetric to the position of the radio wave radiating unit 102 with respect to the reflection unit 104. For example, when the angle changing unit 108 rotates the mounting unit 107 one or more times around the radio wave radiating unit 102 so that the reflection unit 104 reflects the radio wave radiated by the radio wave radiating unit 102 at a plurality of first measurement angles, the information processing apparatus 300 may regard the radio wave reflected by the reflection unit 104 and radiated to the outside from the radio wave radiated by the radio wave radiating unit 102 as the radio wave radiated by the virtual antenna 150 located at each of the plurality of black circles shown around the reflection unit 104 in FIG. 1.

[0070] The information processing apparatus 300 may regard the radio wave reflected by the reflection unit 104 and radiated to the outside from the radio wave radiated by the radio wave radiating unit 102 as the radio wave radiated by the virtual array 170 composed of a plurality of virtual antennas 150. For example, when the angle changing unit 108 rotates the mounting unit 107 one or more times around the radio wave radiating unit 102 so that the reflection unit 104 reflects the radio wave radiated by the radio wave radiating unit 102 at a plurality of first measurement angles, the information processing apparatus 300 may select a plurality of virtual antennas 150 constituting the virtual array 170.

[0071] The information processing apparatus 300 may regard the radio wave reflected by the reflection unit 202 and received by the radio wave receiving unit 204 as the radio wave received by the virtual antenna 250 located at a position symmetric to the position of the radio wave receiving unit 204 with respect to the reflection unit 202. For example, when the angle changing unit 208 rotates and moves the reflection unit 202 more than one rotation with respect to the radio wave receiving unit 204 so that the reflection unit 202 reflects the radio wave emitted by the antenna device 100 at a plurality of second measurement angles, the information processing apparatus 300 may regard the radio wave reflected by the reflection unit 202 and received by the radio wave receiving unit 204 as the radio wave received by the virtual antenna 250 located at each of the plurality of black circles shown around the reflection unit 202 in FIG. 1.

[0072] The information processing apparatus 300 may regard the radio wave reflected by the reflection unit 202 and received by the radio wave receiving unit 204 as the radio wave received by the virtual array 270 composed of a plurality of virtual antennas 250. For example, when the angle changing unit 208 rotates and moves the reflection unit 202 more than one rotation with respect to the radio wave receiving unit 204 so that the reflection unit 202 reflects the radio wave emitted by the antenna device 100 at a plurality of second measurement angles, the information processing apparatus 300 may select a plurality of virtual antennas 250 constituting the virtual array 270.

[0073] The information processing device 300 determines, for example, radio waves that are transmitted by the antenna device 100 when the rotation angle of the reflection unit 104 is the first measurement angle and received by the antenna device 200 when the rotation angle of the reflection unit 202 is the reception target rotation angle not included in the plurality of second measurement angles, based on a plurality of measurement data measured by the antenna device 200 receiving the radio waves transmitted at the first measurement angle by the antenna device 100 at a plurality of second measurement angles. The information processing device 300 determines, for example, radio waves that are transmitted by the antenna device 100 when the rotation angle of the reflection unit 104 is the first measurement angle and received by the antenna device 200 when the rotation angle of the reflection unit 202 is the reception target rotation angle, by performing synthetic aperture processing on the opening of the radio wave reception unit 204 based on the plurality of measurement data. Specific processing for the information processing device 300 to determine radio waves that are transmitted by the antenna device 100 when the rotation angle of the reflection unit 104 is the first measurement angle and received by the antenna device 200 when the rotation angle of the reflection unit 202 is the reception target rotation angle will be described later.

[0074] The information processing device 300 determines, for example, radio waves transmitted by the antenna device 100 when the rotation angle of the reflection unit 104 is the emission target rotation angle not included in the plurality of first measurement angles and received by the antenna device 200 when the rotation angle of the reflection unit 202 is the second measurement angle, based on a plurality of measurement data measured by the antenna device 200 receiving radio waves emitted at each of the plurality of first measurement angles by the antenna device 100 at the second measurement angle. The information processing device 300 determines, for example, radio waves transmitted by the antenna device 100 when the rotation angle of the reflection unit 104 is the emission target rotation angle and received by the antenna device 200 when the rotation angle of the reflection unit 202 is the second measurement angle, by performing synthetic aperture processing on the aperture of the radio wave radiation unit 102 based on the plurality of measurement data. Specific processing for the information processing device 300 to determine radio waves transmitted by the antenna device 100 when the rotation angle of the reflection unit 104 is the emission target rotation angle and received by the antenna device 200 when the rotation angle of the reflection unit 202 is the second measurement angle will be described later.

[0075] The information processing device 300 determines, for example, the radio wave transmitted by the antenna device 100 when the rotation angle of the reflection unit 104 is the emission target rotation angle and received by the antenna device 200 when the rotation angle of the reflection unit 202 is the reception target rotation angle, based on a plurality of measurement data measured by the antenna device 200 receiving the radio waves emitted at each of the plurality of first measurement angles by the antenna device 100. The information processing device 300 determines, for example, the radio wave transmitted by the antenna device 100 when the rotation angle of the reflection unit 104 is the emission target rotation angle and received by the antenna device 200 when the rotation angle of the reflection unit 202 is the reception target rotation angle, by performing synthetic aperture processing on each of the openings of the radio wave radiation unit 102 and the radio wave reception unit 204 based on the plurality of measurement data. Specific processing for the information processing device 300 to determine the radio wave transmitted by the antenna device 100 when the rotation angle of the reflection unit 104 is the emission target rotation angle and received by the antenna device 200 when the rotation angle of the reflection unit 202 is the reception target rotation angle will be described later.

[0076] FIG. 2 schematically shows an example of the antenna device 100. Here, the relationship between the rotation angle of the reflection unit 104 and the rotation angle of the virtual antenna 150 will be mainly described.

[0077] In the example shown in FIG. 2, the angle changing unit 108 rotates about a rotation axis parallel to the z-axis. Here, the rotation direction in which the angle changing unit 108 rotates counterclockwise about the rotation axis is defined as the positive rotation direction, and the rotation direction in which the angle changing unit 108 rotates clockwise about the rotation axis is defined as the negative rotation direction.

[0078] The virtual antenna 150 rotates by the angle changing unit 108 rotating and moving the mounting unit 107 about the radio wave radiation unit 102, thereby rotating and moving the reflection unit 104 with respect to the radio wave radiation unit 102. In the example shown in FIG. 2, when the angle changing unit 108 rotates the reflection unit 104 by θ with respect to the radio wave radiation unit 102 TxWhen only rotated and moved, the virtual antenna 150 rotates by θ Tx only. Therefore, θ Tx may represent the rotation angle of the reflection unit 104 or the rotation angle of the virtual antenna 150.

[0079] In an example shown in FIG. 2, the installation surface of the angle changing unit 108 is a plane parallel to the xy plane. Also, in an example shown in FIG. 2, the mounting surface of the mounting unit 107 is a plane parallel to the xy plane. Also, in an example shown in FIG. 2, the support unit 106 is mounted on the mounting surface of the mounting unit 107 so as to be parallel to the z axis.

[0080] FIG. 3 is an explanatory diagram for explaining an example of the relationship between the radio wave radiating unit 102 and the virtual antenna 150. Here, the positional relationship between the radio wave radiating unit 102 and the virtual antenna 150 will be mainly described.

[0081] Since the virtual antenna 150 is located at a position symmetric to the position of the radio wave radiating unit 102 with respect to the reflection unit 104, the distance from the reflection unit 104 to the virtual antenna 150 is the same as the distance from the reflection unit 104 to the radio wave radiating unit 102. In an example shown in FIG. 3, both the distance from the reflection unit 104 to the radio wave radiating unit 102 and the distance from the reflection unit 104 to the virtual antenna 150 are R Tx is.

[0082] Also, since the virtual antenna 150 is located at a position symmetric to the position of the radio wave radiating unit 102 with respect to the reflection unit 104, the angle formed by the reflection unit 104 and the straight line perpendicular to the opening surface 152 of the opening of the virtual antenna 150 is the same as the angle formed by the reflection unit 104 and the straight line perpendicular to the opening surface 103 of the opening of the radio wave radiating unit 102. In an example shown in FIG. 3, the straight line perpendicular to the opening surface 103 with respect to the reflection unit 104 is a straight line parallel to the z axis, and the straight line perpendicular to the opening surface 152 with respect to the reflection unit 104 is a straight line parallel to the x axis. Also, in an example shown in FIG. 3, both the angle formed by the reflection unit 104 and the straight line perpendicular to the opening surface 103 and the angle formed by the reflection unit 104 and the straight line perpendicular to the opening surface 152 are 45°.

[0083] FIG. 4 is an explanatory diagram for explaining an example of the virtual array 170. Here, it is assumed that the origin of the xyz coordinate system shown in FIG. 4 is the reflection point where the reflected portion 104 reflects the radio wave radiated by the radio wave radiating portion 102.

[0084] In an example shown in FIG. 4, the virtual array 170 is composed of 2N_Tx + 1 virtual antennas 150 located at each of the 2N_Tx + 1 black circles. Here, N_Tx is an integer of 0 or more.

[0085] φ Tx is the rotation angle at the center of the rotation angles of the 2N_Tx + 1 virtual antennas 150. Therefore, among the 2N_Tx + 1 virtual antennas 150, N_Tx virtual antennas 150 have a θ Tx = φ Tx greater than that of the virtual antenna 150 located at the black circle corresponding to, and among the 2N_Tx + 1 virtual antennas 150, N_Tx virtual antennas 150 have a θ Tx smaller than that of the virtual antenna 150 located at the black circle corresponding to. Tx = φ Tx Tx Tx is smaller.

[0086] In an example shown in FIG. 4, among the 2N_Tx + 1 virtual antennas 150 constituting the virtual array 170, the virtual antenna 150 located at the black circle corresponding to θ Tx = φ Tx + θ 1 , the virtual antenna 150 located at the black circle corresponding to θ Tx = φ Tx + θ 2 , ···, the virtual antenna 150 located at the black circle corresponding to θ Tx = φ Tx + θ N_Tx-2 , the virtual antenna 150 located at the black circle corresponding to θ Tx = φ Tx + θ N_Tx-1 , and the virtual antenna 150 located at the black circle corresponding to θ Tx = φ Tx + θ N_TxThe N_Tx virtual antennas 150 located at the black circles corresponding to θ Tx = φ Tx are larger in θ than the virtual antennas 150 located at the black circles corresponding to θ Tx Moreover, among the 2N_Tx + 1 virtual antennas 150 constituting the virtual array 170, the virtual antennas 150 located at the black circles corresponding to θ Tx = φ Tx + θ -1 ; the virtual antennas 150 located at the black circles corresponding to θ Tx = φ Tx + θ -2 ; ···; the virtual antennas 150 located at the black circles corresponding to θ Tx = φ Tx + θ -(N_Tx-2) ; the virtual antennas 150 located at the black circles corresponding to θ Tx = φ Tx + θ -(N_Tx-1) ; and the N_Tx virtual antennas 150 located at the black circles corresponding to θ Tx = φ Tx + θ -N_Tx are smaller in θ than the virtual antennas 150 located at the black circles corresponding to θ Tx = φ Tx . Tx is smaller.

[0087] FIG. 5 is an explanatory diagram for explaining an example of the positions of the virtual antennas 150. Here, it is assumed that the origin of the xyz coordinate system shown in FIG. 5 is the reflection point where the radio wave radiated by the radio wave radiating unit 102 is reflected by the reflecting unit 104.

[0088] The positions of the virtual antennas 150 may be represented by position vectors. In the example shown in FIG. 5, the position vector R Tx = φ Tx + θ n_Tx representing the position of the virtual antenna 150 located at the black circle corresponding to θ n_Tx is R n_Tx = (R Tx cos(180°+(φ Tx + θ n_Tx )), R Tx sin(180°+(φ Tx+θ n_Tx )))=(-R Tx cos(φ Tx +θ n_Tx ),-R Tx sin(φ Tx +θ n_Tx )) is. θ n_Tx is n_Tx × AS Tx and n_Tx is an integer satisfying -N_Tx ≤ n_Tx ≤ N_Tx.

[0089] FIG. 6 is an explanatory diagram for explaining an example of the emission target rotation angle. Here, it is assumed that the origin of the xyz coordinate system shown in FIG. 6 is the reflection point where the reflecting unit 104 reflects the radio wave radiated by the radio wave radiating unit 102.

[0090] In an example shown in FIG. 6, φ Tx + φ SC_Tx is the emission target rotation angle. φ SC_Tx is the offset angle, and 0° < φ SC_Tx ≤ (AS Tx - φ step_Tx ) is satisfied. φ step_Tx is the step angle, and 0.1° ≤ φ step_Tx ≤ 1° is satisfied. For example, when AS Tx = 2° and φ step_Tx = 0.1°, φ SC_Tx satisfies 0° < φ SC_Tx ≤ 1.9°.

[0091] Determining the radio wave reflected by the reflecting unit 104 and emitted to the outside when the radio wave radiated by the radio wave radiating unit 102 is θ Tx = φ Tx + φ SC_Tx may be to determine the radio wave emitted by the virtual antenna 150 located at the black square corresponding to θ Tx = φ Tx + φ SC_Tx . k sc_Tx is the wave number vector of the radio wave emitted by the virtual antenna 150 located at the black square corresponding to θ Tx = φ Tx + φ SC_Tx . In an example shown in FIG. 6, ksc_Tx is k sc_Tx =(kcos(180°+(φ Tx +φ SC_Tx ))),ksin(180°+(φ Tx +φ SC_Tx )))=(-kcos(φ Tx +φ SC_Tx ),-ksin(φ Tx +φ SC_Tx )) and is represented as such. k is the wave number of k sc_Tx

[0092] FIG. 7 schematically shows an example of the antenna device 200. Here, the relationship between the rotation angle of the reflection unit 202 and the rotation angle of the virtual antenna 250 will be mainly described.

[0093] In an example shown in FIG. 7, the angle changing unit 208 rotates about a rotation axis parallel to the z'-axis. Here, the rotation direction in which the angle changing unit 208 rotates counterclockwise about the rotation axis is defined as the positive rotation direction, and the rotation direction in which the angle changing unit 208 rotates clockwise about the rotation axis is defined as the negative rotation direction.

[0094] When the angle changing unit 208 rotates and moves the reflection unit 202 with respect to the radio wave receiving unit 204, the virtual antenna 250 rotates and moves. In an example shown in FIG. 7, when the angle changing unit 208 rotates and moves the reflection unit 202 with respect to the radio wave receiving unit 204 by θ Rx only, the virtual antenna 250 rotates and moves by θ Rx only. Therefore, θ Rx may represent the rotation angle of the reflection unit 202 or may represent the rotation angle of the virtual antenna 250.

[0095] In an example shown in FIG. 7, the installation surface of the angle changing unit 208 is a plane parallel to the x'y' plane. Also, in an example shown in FIG. 7, the support unit 206 is installed on the installation surface of the angle changing unit 208 so as to be parallel to the z'-axis.

[0096] ​FIG. 8 is an explanatory diagram for explaining an example of the relationship between the radio wave receiving unit 204 and the virtual antenna 250. Here, the positional relationship between the radio wave receiving unit 204 and the virtual antenna 250 will be mainly described.

[0097] Since the virtual antenna 250 is located at a position symmetric to the position of the radio wave receiving unit 204 with respect to the reflection unit 202, the distance from the reflection unit 202 to the virtual antenna 250 is the same as the distance from the reflection unit 202 to the radio wave receiving unit 204. In an example shown in FIG. 8, both the distance from the reflection unit 202 to the radio wave receiving unit 204 and the distance from the reflection unit 202 to the virtual antenna 250 are R Rx is.

[0098] Also, since the virtual antenna 250 is located at a position symmetric to the position of the radio wave receiving unit 204 with respect to the reflection unit 202, the angle formed by the reflection unit 202 and a straight line perpendicular to the opening surface 252 of the opening of the virtual antenna 250 is the same as the angle formed by the reflection unit 202 and a straight line perpendicular to the opening surface 205 of the opening of the radio wave receiving unit 204. In an example shown in FIG. 8, the straight line perpendicular to the opening surface 205 with respect to the reflection unit 202 is a straight line parallel to the z'-axis, and the straight line perpendicular to the opening surface 252 with respect to the reflection unit 202 is a straight line parallel to the y'-axis. Also, in an example shown in FIG. 8, both the angle formed by the reflection unit 202 and the straight line perpendicular to the opening surface 205 and the angle formed by the reflection unit 202 and the straight line perpendicular to the opening surface 252 are 45°.

[0099] FIG. 9 is an explanatory diagram for explaining an example of the virtual array 270. Here, it is assumed that the origin of the x'y'z' coordinate system shown in FIG. 9 is the reflection point where the radio wave received by the radio wave receiving unit 204 is reflected by the reflection unit 202.

[0100] In an example shown in FIG. 9, the virtual array 270 is composed of 2N_Rx + 1 virtual antennas 250 located at each of the 2N_Rx + 1 black circles. Note that N_Rx is an integer of 0 or more.

[0101] φ Rxis the rotation angle at the center of the rotation angles of the 2N_Rx + 1 virtual antennas 250. Therefore, among the 2N_Rx + 1 virtual antennas 250, N_Rx virtual antennas 250 have a θ Rx = φ Rx greater than that of the virtual antenna 250 located at the black circle corresponding to, and among the 2N_Rx + 1 virtual antennas 250, N_Rx virtual antennas 250 have a θ Rx = φ Rx = φ Rx less than that of the virtual antenna 250 located at the black circle corresponding to. Rx

[0102] In an example shown in FIG. 9, among the 2N_Rx + 1 virtual antennas 250 constituting the virtual array 270, θ Rx = φ Rx + θ 1 corresponding to the virtual antenna 250 located at the black circle, θ Rx = φ Rx + θ 2 corresponding to the virtual antenna 250 located at the black circle, ···, θ Rx = φ Rx + θ N_Rx-2 corresponding to the virtual antenna 250 located at the black circle, θ Rx = φ Rx + θ N_Rx-1 corresponding to the virtual antenna 250 located at the black circle, and θ Rx = φ Rx + θ N_Rx corresponding to the virtual antenna 250 located at the black circle, among the N_Rx virtual antennas 250 have a θ Rx = φ Rx greater than that of the virtual antenna 250 located at the black circle corresponding to. Also, among the 2N_Rx + 1 virtual antennas 250 constituting the virtual array 270, θ Rx = φ Rx = φ Rx + θ -1 corresponding to the virtual antenna 250 located at the black circle, θ Rx = φ Rx + θ -2 corresponding to the virtual antenna 250 located at the black circle, ···, θ Rx = φ Rx + θ -(N_Rx-2) ​The virtual antenna 250 located at the black circle corresponding to θ Rx = φ Rx + θ -(N_Rx-1) The virtual antenna 250 located at the black circle corresponding to θ, and θ Rx = φ Rx + θ -N_Rx The N_Rx virtual antennas 250 of the virtual antenna 250 located at the black circle corresponding to θ are θ Rx = φ Rx Smaller than θ of the virtual antenna 250 located at the black circle corresponding to φ Rx is smaller.

[0103] FIG. 10 is an explanatory diagram for explaining an example of the position of the virtual antenna 250. Here, it is assumed that the origin of the x'y'z' coordinate system shown in FIG. 10 is the reflection point where the reflection unit 202 reflects the radio wave received by the radio wave receiving unit 204.

[0104] The position of the virtual antenna 250 may be represented by a position vector. In an example shown in FIG. 10, θ Rx = φ Rx + θ n_Rx The position vector R representing the position of the virtual antenna 250 located at the black circle corresponding to n_Rx is R n_Rx =(R Rx cos(180°+(φ Rx + θ n_Rx )), R Rx sin(180°+(φ Rx + θ n_Rx )))=(-R Rx cos(φ Rx + θ n_Rx ), -R Rx sin(φ Rx + θ n_Rx)). θ n_Rx is n_Rx × AS Rx and n_Rx is an integer satisfying -N_Rx ≤ n_Rx ≤ N_Rx.

[0105] FIG. 11 is an explanatory diagram for explaining an example of the reception target rotation angle. Here, it is assumed that the origin of the x'y'z' coordinate system shown in FIG. 11 is the reflection point where the reflecting unit 202 reflects the radio wave received by the radio wave receiving unit 204.

[0106] In an example shown in FIG. 11, φ Rx + φ SC_Rx is the reception target rotation angle. φ SC_Rx is the offset angle, and 0° < φ SC_Rx ≤ (AS Rx - φ step_Rx ). φ step_Rx is the step angle, and 0.1° ≤ φ step_Rx ≤ 1°. For example, when AS Rx = 2° and φ step_Rx = 0.1°, φ SC_Rx satisfies 0° < φ SC_Rx ≤ 1.9°.

[0107] θ Rx = φ Rx + φ SC_Rx When determining the radio wave reflected by the reflecting unit 202 and received by the radio wave receiving unit 204, it may be to determine the radio wave received by the virtual antenna 250 located at the black square corresponding to θ Rx = φ Rx + φ SC_Rx . k sc_Rx is the wave number vector of the radio wave received by the virtual antenna 250 located at the black square corresponding to θ Rx = φ Rx + φ SC_Rx . In an example shown in FIG. 11, k sc_Rx is k sc_Rx = (k cos(180° + (φ Rx + φ SC_Rx )), k sin(180° + (φ Rx + φ SC_Rx ))) = (-k cos(φ Rx + φ SC_Rx ), -k sin(φ Rx + φ SC_Rx )) and is expressed as such. k is the wave number of k sc_Rx .

[0108] FIG. 12 is an explanatory diagram for explaining an example of the processing flow of the system 10. Here, the start state is a state where the information processing apparatus 300 has not acquired measurement data. In addition, in the processing shown in FIG. 12, it is assumed that the first measurement angle of the reflection unit 104 does not change.

[0109] In step 102 (the step may be abbreviated as S), the antenna device 100 emits radio waves when the radio waves radiated by the radio wave radiation unit 102 are reflected by the reflection unit 104. While the antenna device 100 is emitting radio waves, the antenna device 200 receives the radio waves emitted by the antenna device 100 at a plurality of second measurement angles.

[0110] For example, while the antenna device 100 is emitting radio waves, when the angle changing unit 208 rotates the reflection unit 202 by one rotation with respect to the radio wave receiving unit 204, AS Rx = 2°, the antenna device 200 receives the radio waves emitted by the antenna device 100 at the second measurement angles of 180 reflection units 202. For example, the radio wave receiving unit 204 receives the radio waves reflected by the reflection unit 202 when θ Rx = -180°, the radio waves reflected by the reflection unit 202 when θ Rx = -178°, the radio waves reflected by the reflection unit 202 when θ Rx = -176°, ···, the radio waves reflected by the reflection unit 202 when θ Rx = 174°, the radio waves reflected by the reflection unit 202 when θ Rx = 176°, and the radio waves reflected by the reflection unit 202 when θ Rx = 178°.

[0111] In S104, the VNA 500 measures the electric field strength of the radio waves received by the antenna device 200 while the antenna device 100 is emitting radio waves in S102. For example, the VNA 500 measures the electric field strength of the radio waves received by the radio wave receiving unit 204 after being reflected by the reflection unit 202 when θ Rx = -180°, the electric field strength of the radio waves received by the radio wave receiving unit 204 after being reflected by the reflection unit 202 when θ Rx= the electric field strength of the radio wave reflected by the reflecting part 202 and received by the radio wave receiving part 204 when θ = -178°, Rx = the electric field strength of the radio wave reflected by the reflecting part 202 and received by the radio wave receiving part 204 when θ = -176°, ···, Rx = the electric field strength of the radio wave reflected by the reflecting part 202 and received by the radio wave receiving part 204 when θ = 174°, Rx = the electric field strength of the radio wave reflected by the reflecting part 202 and received by the radio wave receiving part 204 when θ = 176°, and, Rx = the electric field strength of the radio wave reflected by the reflecting part 202 and received by the radio wave receiving part 204 when θ = 178° are measured.

[0112] In S106, the information processing device 300 acquires a plurality of measurement data measured by the VNA500 in S104 from the VNA500. For example, the information processing device 300 measures, for θ Rx = the measurement data of the electric field strength of the radio wave reflected by the reflecting part 202 and received by the radio wave receiving part 204 when θ = -180°, Rx = the measurement data of the electric field strength of the radio wave reflected by the reflecting part 202 and received by the radio wave receiving part 204 when θ = -178°, Rx = the measurement data of the electric field strength of the radio wave reflected by the reflecting part 202 and received by the radio wave receiving part 204 when θ = -176°, ···, Rx = the measurement data of the electric field strength of the radio wave reflected by the reflecting part 202 and received by the radio wave receiving part 204 when θ = 174°, Rx = the measurement data of the electric field strength of the radio wave reflected by the reflecting part 202 and received by the radio wave receiving part 204 when θ = 176°, and, Rx = 180 pieces of measurement data including the measurement data of the electric field strength of the radio wave reflected by the reflecting part 202 and received by the radio wave receiving part 204 when θ = 178° are acquired.

[0113] In S108, the information processing apparatus 300 executes a base conversion process on each of the plurality of measurement data acquired from the VNA 500 in S106. For example, the information processing apparatus 300 determines φ, which is the center of the plurality of second measurement angles of the reflection unit 202 corresponding to the plurality of measurement data, as the second measurement angle for executing the base conversion process on the measurement data. Rx After that, the information processing apparatus 300 executes a base conversion process on each of the plurality of measurement data using the following mathematical formula.

[0114]

Equation

[0115] E V (φ Rx +θ n_Rx ) is the electric field strength of the vertically polarized component of the radio wave received by the radio wave receiving unit 204 when the radio wave is emitted by the antenna device 100 and the second measurement angle of the reflection unit 202 is φ Rx +θ n_Rx . E H (φ Rx +θ n_Rx ) is the electric field strength of the horizontally polarized component of the radio wave received by the radio wave receiving unit 204 when the radio wave is emitted by the antenna device 100 and the second measurement angle of the reflection unit 202 is φ Rx +θ n_Rx . E Rx1 (φ Rx +θ n_Rx ) is the electric field strength of the radio wave received by the radio wave receiving unit 204 when the radio wave is emitted by the antenna device 100 and the second measurement angle of the reflection unit 202 is φ Rx +θ n_Rx , and is the electric field strength of the radio wave measured at terminal 1 of the VNA 500, which is included in the measurement data measured by the VNA 500. E Rx2 (φ Rx +θ n_Rx ) is the electric field strength of the radio wave measured at terminal 2 of the VNA 500, which is included in the measurement data. θ n_Rx is n_Rx×AS Rx .

[0116] In S110, the information processing apparatus 300 selects a plurality of measurement data used to determine the radio wave received by the antenna apparatus 200 when the radio wave is emitted by the antenna apparatus 100 and the rotation angle of the reflecting unit 202 is the reception target rotation angle, from among the plurality of measurement data for which the base conversion process has been executed in S108. For example, the information processing apparatus 300 selects measurement data centered on the measurement data of the electric field strength of the radio wave received by the radio wave receiving unit 204 when the second measurement angle of the reflecting unit 202 is φ Rx from among the 180 pieces of measurement data for which the base conversion process has been executed in S108.

[0117] For example, the information processing apparatus 300 selects the measurement data of the electric field strength of the radio wave received by the radio wave receiving unit 204 when the second measurement angle of the reflecting unit 202 is φ Rx + θ 1 the measurement data of the electric field strength of the radio wave received by the radio wave receiving unit 204 when the second measurement angle of the reflecting unit 202 is φ Rx + θ 2 the measurement data of the electric field strength of the radio wave received by the radio wave receiving unit 204 when the second measurement angle of the reflecting unit 202 is φ Rx + θ N_Rx-2 the measurement data of the electric field strength of the radio wave received by the radio wave receiving unit 204 when the second measurement angle of the reflecting unit 202 is φ Rx + θ N_Rx-1 the measurement data of the electric field strength of the radio wave received by the radio wave receiving unit 204 when the second measurement angle of the reflecting unit 202 is φ Rx + θ N_Rx the measurement data of the electric field strength of the radio wave received by the radio wave receiving unit 204 when the second measurement angle of the reflecting unit 202 is φ Rx + θ -1Measurement data obtained by measuring the electric field strength of the radio wave received by the radio wave receiving unit 204 when it is as described, radio waves emitted by the antenna device 100 and the second measurement angle of the reflection unit 202 is φ Rx +θ -2 Measurement data obtained by measuring the electric field strength of the radio wave received by the radio wave receiving unit 204 when it is as described, ···, radio waves emitted by the antenna device 100 and the second measurement angle of the reflection unit 202 is φ Rx +θ -(N_Rx-2) Measurement data obtained by measuring the electric field strength of the radio wave received by the radio wave receiving unit 204 when it is as described, radio waves emitted by the antenna device 100 and the second measurement angle of the reflection unit 202 is φ Rx +θ -(N_Rx-1) Measurement data obtained by measuring the electric field strength of the radio wave received by the radio wave receiving unit 204 when it is as described, and radio waves emitted by the antenna device 100 and the second measurement angle of the reflection unit 202 is φ Rx +θ -N_Rx Select N_Rx pieces of measurement data including the measurement data obtained by measuring the electric field strength of the radio wave received by the radio wave receiving unit 204 when it is as described. Thereby, the information processing device 300 selects 2N_Rx + 1 pieces of measurement data.

[0118] In S112, the information processing device 300 determines the radio wave received by the antenna device 200 when the rotation angle of the reflection unit 202 is the reception target rotation angle and the radio waves are emitted by the antenna device 100 based on the plurality of measurement data selected in S110. For example, the information processing device 300 determines the radio wave received by the antenna device 200 when the rotation angle of the reflection unit 202 is the reception target rotation angle and the radio waves are emitted by the antenna device 100 based on 2N_Rx + 1 pieces of measurement data.

[0119] The information processing device 300 determines, for example, the radio wave transmitted by the antenna device 100 and received by the antenna device 200 when the rotation angle of the reflecting unit 202 is the reception target rotation angle, by regarding the radio wave reflected by the reflecting unit 202 at a first second measurement angle and received by the radio wave receiving unit 204 as the radio wave received by the virtual antenna 250, by executing synthetic aperture processing based on a plurality of measurement data selected in S110. The information processing device 300 determines, for example, the radio wave transmitted by the antenna device 100 and received by the antenna device 200 when the rotation angle of the reflecting unit 202 is the reception target rotation angle, by regarding the radio waves reflected by the reflecting unit 202 at a plurality of second measurement angles and received by the radio wave receiving unit 204 as the radio waves received by the virtual array 270 composed of a plurality of virtual antennas 250, by executing synthetic aperture processing based on a plurality of measurement data selected in S110. The information processing device 300 executes synthetic aperture processing, for example, using the following mathematical formula.

[0120] [Number]

[0121] [Number] is the electric field strength of the vertically polarized wave component of the radio wave received by the virtual antenna 250 when the radio wave is transmitted by the antenna device 100 and the rotation angle of the reflecting unit 202 is the reception target rotation angle. φ Rx +φ SC_Rx is the reception target rotation angle. φ SC_Rx is the offset angle. E V (φ Rx +θ n_Rx ) is the electric field strength of the vertically polarized wave component of the radio wave received by the virtual antenna 250 when the radio wave is transmitted by the antenna device 100 and the second measurement angle of the reflecting unit 202 is φ Rx +θ n_Rx is. w n_Rx is the Gaussian window. k SC_Rxis the wave number vector of the radio wave received by the virtual antenna 250 when the rotation angle of the reflection unit 202 is the received target rotation angle. R n_Rx is the second measurement angle of the reflection unit 202 being φ Rx +θ n_Rx is the position vector of the virtual antenna 250 at this time. R Rx is the distance from the reflection unit 202 to the virtual antenna 250. σ Rx is the Gaussian window w n_Rx is the standard deviation defining the width of.

[0122] The information processing device 300 may determine the electric field strength of the horizontally polarized wave component of the radio wave emitted by the antenna device 100 and received by the virtual antenna 250 when the rotation angle of the reflection unit 202 is the received target rotation angle. In this case, the mathematical formula of the above synthetic aperture processing is transformed as follows.

[0123]

Equation

[0124]

Equation

[0125] In the above mathematical formula of the synthetic aperture processing, k SC_Rx ·R n_Rx is the inner product of k SC_Rx and R n_Rx is. k SC_Rx ·R n_Rx is kSC_Rx ·R n_Rx =kR Rx may be expressed as kR cosα. Here, α is the angle formed by k SC_Rx and R n_Rx .

[0126] As shown in the mathematical formula of the above synthetic aperture process, k SC_Rx and R n_Rx include φ Rx . Therefore, even if φ SC_Rx included in k n_Rx and R Rx is omitted, the angle α formed by k SC_Rx and R n_Rx does not change. Thus, the value of k SC_Rx ·R n_Rx does not change. From the above, the mathematical formula of the above synthetic aperture process may be transformed as follows.

[0127]

Number

[0128] The information processing apparatus 300 determines, for example, radio waves received by the antenna apparatus 200 when the rotation angle of the reflection unit 202 is each reception target rotation angle among a plurality of reception target rotation angles at predetermined angular intervals and the radio waves are emitted by the antenna apparatus 100. The angular interval may coincide with φ step_Rx . The angular interval may be an angular interval shorter than AS Rx .

[0129] Here, when φ Rx = 0°, AS Rx = 2°, and φ step_Rx = 0.1°, the information processing apparatus 300 is φ SC_RxBy scanning, an example of a process for determining the radio wave received by the antenna device 200 when the radio wave emitted by the antenna device 100 and the rotation angle of the reflection unit 202 are each of the plurality of reception target rotation angles will be described. In this case, the plurality of reception target rotation angles are 19 rotation angles of 0.1°, 0.2°, ···, 1.8°, and 1.9°.

[0130] First, the information processing device 300 sets φ SC_Rx = 0.1° to determine the radio wave received by the antenna device 200 when the radio wave emitted by the antenna device 100 and the rotation angle of the reflection unit 202 are 0.1°. Next, the information processing device 300 scans φ SC_Rx by φ step_Rx to determine the radio wave received by the antenna device 200 when the radio wave emitted by the antenna device 100 and the rotation angle of the reflection unit 202 are 0.2°. Thereafter, the information processing device 300 similarly scans φ SC_Rx to determine the radio wave received by the antenna device 200 when the radio wave emitted by the antenna device 100 and the rotation angle of the reflection unit 202 are 1.9°.

[0131] In S114, the information processing device 300 determines the rotation angle of the reflection unit 202 when the radio wave emitted by the antenna device 100 arrives at the antenna device 200 with the maximum electric field strength, based on the electric field strength of the radio wave received by the antenna device 200 at the plurality of second measurement angles of the reflection unit 202, which is included in the plurality of measurement data selected in S110, and the electric field strength of the radio wave received by the antenna device 200 when the radio wave emitted by the antenna device 100 and the rotation angle of the reflection unit 202 are each of the plurality of reception target rotation angles determined in S112. For example, AS Rx = 2° and φ step_RxWhen it is 0.1°, the information processing device 300 determines the rotation angle of the reflecting unit 202 when the radio wave emitted by the antenna device 100 arrives at the antenna device 200 with the maximum electric field strength, based on the electric field strength of the radio wave emitted by the antenna device 100 and received by the antenna device 200 at 2N_Rx + 1 measurement angles of the reflecting unit 202, and the electric field strength of the radio wave emitted by the antenna device 100 and received by the antenna device 200 at each reception target rotation angle where the rotation angle of the reflecting unit 202 is one of the 2N_Rx × 19 reception target rotation angles.

[0132] The applicant has developed a so-called "rotating reflector antenna" in which a parabolic reflector is rotationally moved with respect to a primary radiator whose position and angle are fixed, and the radio wave reflected by the reflector is received by the primary radiator while changing the rotation angle of the reflector. One of the advantages of the rotating reflector antenna is that the arrival direction of the radio wave can be determined at high speed by rotating the reflector. On the other hand, when receiving radio waves with short wavelengths such as in the terahertz band and the high SHF band using a rotating reflector antenna, when narrowing the beam width of the radio wave received by the primary radiator, a parabolic reflector with a large aperture is required. A parabolic reflector with a large aperture tends to have a high manufacturing cost. Furthermore, due to the machining limits of processing machines and the like, it may not be possible to manufacture a parabolic reflector with a large aperture. In addition, when determining the arrival direction of a radio wave with high precision using a rotating reflector antenna, it is necessary to finely change the angular interval of the rotation angle of the reflector when the reflector reflects radio waves from the outside to obtain a large number of measurement data. As a result, when determining the arrival direction of a radio wave with high precision using a rotating reflector antenna, the arrival direction of the radio wave cannot be determined in a short measurement time. From the above, it is desirable to be able to realize an antenna capable of receiving radio waves with short wavelengths with a narrow beam width at a low manufacturing cost, and to be able to determine the arrival direction of radio waves with high precision in a short measurement time.

[0133] On the other hand, according to the system 10 according to the present embodiment, the antenna device 200 that receives radio waves at the radio wave receiving unit 204 while changing the rotation angle of the reflecting unit 202 by rotating the reflecting unit 202 having a plate-like shape with respect to the radio wave receiving unit 204 receives the radio waves from the antenna device 100. Since the shape of the reflecting unit 202 is plate-like, a commercially available plane mirror or the like can be used as the reflecting unit 202. By increasing the distance between the reflecting unit 202 and the radio wave receiving unit 204, it is possible to realize a large aperture of the antenna without performing special processing. Therefore, the antenna device 200 having the reflecting unit 202 with a plate-like shape can realize a large aperture of the antenna required for receiving short-wavelength radio waves with a narrow beam width at a low manufacturing cost as compared with a rotary reflecting mirror antenna having a parabolic reflecting mirror. Further, according to the system 10 according to the present embodiment, the information processing device 300 is based on a plurality of measurement data measured by the antenna device 200 receiving the radio waves emitted by the antenna device 100 at a plurality of second measurement angles of the reflecting unit 202, and determines the radio waves emitted by the antenna device 100 and received by the antenna device 200 when the rotation angle of the reflecting unit 202 is the reception target rotation angle. By the information processing device 300 determining the radio waves received by the antenna device 200 when the rotation angle of the reflecting unit 202 is the reception target rotation angle based on the plurality of measurement data, it is possible to highly precisely determine the arrival direction of the radio waves using a small number of measurement data. Therefore, the system 10 according to the present embodiment can highly precisely determine the arrival direction of the radio waves in a short measurement time. As described above, the system 10 according to the present embodiment can realize an antenna capable of receiving short-wavelength radio waves with a narrow beam width at a low manufacturing cost, and can highly precisely determine the arrival direction of the radio waves in a short measurement time.

[0134] FIG. 13 is an explanatory diagram for explaining another example of the processing flow of the system 10. Here, the state where the information processing device 300 has not acquired the measurement data is taken as the start state. In addition, in the processing shown in FIG. 13, it is assumed that the second measurement angle of the reflecting unit 202 does not change.

[0135] In S202, the antenna device 100 emits radio waves by the reflecting part 104 reflecting the radio waves radiated by the radio wave radiating part 102 at a plurality of first measurement angles. While the antenna device 100 is emitting radio waves at the first measurement angles of the plurality of reflecting parts 104, the antenna device 200 receives the radio waves emitted at the first measurement angles of the plurality of reflecting parts 104 by the antenna device 100.

[0136] For example, while the antenna device 100 is emitting radio waves at the first measurement angles of the plurality of reflecting parts 104, when the angle changing part 108 rotates and moves the mounting part 107 only once around the radio wave radiating part 102, AS Tx When = 2°, the antenna device 100 emits radio waves at the first measurement angles of 180 reflecting parts 104. For example, the antenna device 100 emits radio waves reflected by the reflecting part 104 when θ Tx = -180°, radio waves reflected by the reflecting part 104 when θ Tx = -178°, radio waves reflected by the reflecting part 104 when θ Tx = -176°, ···, radio waves reflected by the reflecting part 104 when θ Tx = 174°, radio waves reflected by the reflecting part 104 when θ Tx = 176°, and radio waves reflected by the reflecting part 202 when θ Tx = 178°.

[0137] In S204, the VNA 500 measures the electric field strength of the radio waves received by the antenna device 200 while the antenna device 100 is emitting radio waves at the first measurement angles of the plurality of reflecting parts 104 in S202. For example, the VNA 500 measures the electric field strength of the radio waves received by the radio wave receiving part 204 after being reflected by the reflecting part 104 when θ Tx = -180°, the electric field strength of the radio waves received by the radio wave receiving part 204 after being reflected by the reflecting part 104 when θ Tx = -178°, the electric field strength of the radio waves received by the radio wave receiving part 204 after being reflected by the reflecting part 104 when θ Tx = -176°, ···, the electric field strength of the radio waves received by the radio wave receiving part 204 after being reflected by the reflecting part 104 when θ Tx = 174°, and the electric field strength of the radio waves received by the radio wave receiving part 204 after being reflected by the reflecting part 104 when θ TxThe electric field strength of the radio wave reflected by the reflection unit 104 and received by the radio wave receiving unit 204 when θ = 176°, and θ Tx Measure the electric field strength of the radio wave reflected by the reflection unit 104 and received by the radio wave receiving unit 204 when θ = 178°.

[0138] In S206, the information processing device 300 acquires a plurality of measurement data measured by the VNA 500 in S204 from the VNA 500. For example, the information processing device 300 measures the electric field strength of the radio wave reflected by the reflection unit 104 and received by the radio wave receiving unit 204 when θ Tx = -180°, the measurement data of the electric field strength of the radio wave reflected by the reflection unit 104 and received by the radio wave receiving unit 204, θ Tx = -178°, the measurement data of the electric field strength of the radio wave reflected by the reflection unit 104 and received by the radio wave receiving unit 204, θ Tx = -176°, the measurement data of the electric field strength of the radio wave reflected by the reflection unit 104 and received by the radio wave receiving unit 204, ···, θ Tx = 174°, the measurement data of the electric field strength of the radio wave reflected by the reflection unit 104 and received by the radio wave receiving unit 204, θ Tx = 176°, the measurement data of the electric field strength of the radio wave reflected by the reflection unit 104 and received by the radio wave receiving unit 204, and θ Tx = 178°, and acquire 180 pieces of measurement data including the measurement data of the electric field strength of the radio wave reflected by the reflection unit 104 and received by the radio wave receiving unit 204.

[0139] In S208, the information processing device 300 selects a plurality of measurement data used to determine the radio wave transmitted by the antenna device 100 and received by the antenna device 200 when the rotation angle of the reflection unit 104 is the emission target rotation angle from among the plurality of measurement data acquired in S206. The information processing device 300 selects, for example, a plurality of measurement data used to determine the radio wave transmitted by the antenna device 100 and received by the antenna device 200 when the rotation angle of the reflection unit 104 is the emission target rotation angle. To do so, φ, which is the first measurement angle at the center of the plurality of first measurement angles of the reflection unit 104 corresponding to the plurality of measurement data acquired in S206Tx Determine. For example, among the 180 pieces of measurement data, the information processing apparatus 300 selects the measurement data centered on the measurement data of the electric field strength of the radio wave emitted by the antenna apparatus 100 and received by the radio wave receiving unit 204 when the first measurement angle of the reflecting unit 104 is φ Tx For example, the information processing apparatus 300 selects the measurement data centered on the measurement data of the electric field strength of the radio wave emitted by the antenna apparatus 100 and received by the radio wave receiving unit 204 when the first measurement angle of the reflecting unit 104 is φ

[0140] For example, the information processing apparatus 300 selects the measurement data centered on the measurement data of the electric field strength of the radio wave emitted by the antenna apparatus 100 and received by the radio wave receiving unit 204 when the first measurement angle of the reflecting unit 104 is φ Tx +θ 1 For the measurement data of the electric field strength of the radio wave emitted by the antenna apparatus 100 and received by the radio wave receiving unit 204 when the first measurement angle of the reflecting unit 104 is φ Tx +θ 2 For the measurement data of the electric field strength of the radio wave emitted by the antenna apparatus 100 and received by the radio wave receiving unit 204 when the first measurement angle of the reflecting unit 104 is φ Tx +θ N_Tx-2 For the measurement data of the electric field strength of the radio wave emitted by the antenna apparatus 100 and received by the radio wave receiving unit 204 when the first measurement angle of the reflecting unit 104 is φ Tx +θ N_Tx-1 For the measurement data of the electric field strength of the radio wave emitted by the antenna apparatus 100 and received by the radio wave receiving unit 204 when the first measurement angle of the reflecting unit 104 is φ Tx +θ N_Tx For the measurement data of the electric field strength of the radio wave emitted by the antenna apparatus 100 and received by the radio wave receiving unit 204 when the first measurement angle of the reflecting unit 104 is φ Tx +θ -1 For the measurement data of the electric field strength of the radio wave emitted by the antenna apparatus 100 and received by the radio wave receiving unit 204 when the first measurement angle of the reflecting unit 104 is φ Tx +θ -2 For the measurement data of the electric field strength of the radio wave emitted by the antenna apparatus 100 and received by the radio wave receiving unit 204 when the first measurement angle of the reflecting unit 104 is φ Tx +θ-(N_Tx-2) Measurement data obtained by measuring the electric field strength of the radio wave transmitted by the antenna device 100 and received by the radio wave receiving unit 204 when it is [condition], and the first measurement angle of the reflection unit 104 is φ Tx +θ -(N_Tx-1) Measurement data obtained by measuring the electric field strength of the radio wave transmitted by the antenna device 100 and received by the radio wave receiving unit 204 when it is [condition], and the first measurement angle of the reflection unit 104 is φ Tx +θ -N_Tx Select N_Tx pieces of measurement data including the measurement data obtained by measuring the electric field strength of the radio wave transmitted by the antenna device 100 and received by the radio wave receiving unit 204 when it is [condition]. Thereby, the information processing device 300 selects 2N_Tx + 1 pieces of measurement data.

[0141] In S210, based on the plurality of measurement data selected in S208, the information processing device 300 determines the radio wave transmitted by the antenna device 100 and received by the antenna device 200 when the rotation angle of the reflection unit 104 is the emission target rotation angle. For example, the information processing device 300 determines the radio wave transmitted by the antenna device 100 and received by the antenna device 200 when the rotation angle of the reflection unit 104 is the emission target rotation angle based on 2N_Tx + 1 pieces of measurement data.

[0142] The information processing device 300 determines the radio wave transmitted by the antenna device 100 and received by the antenna device 200 when the rotation angle of the reflecting unit 104 is the emission target rotation angle, by regarding, for example, the radio wave reflected by the reflecting unit 104 at a first measurement angle and emitted to the outside after being radiated by the radio wave radiating unit 102 as the radio wave emitted by the virtual antenna 150, by executing synthetic aperture processing based on a plurality of measurement data selected in S208. The information processing device 300 determines the radio wave transmitted by the antenna device 100 and received by the antenna device 200 when the rotation angle of the reflecting unit 104 is the emission target rotation angle, by regarding, for example, the radio wave reflected by the reflecting unit 104 at a plurality of first measurement angles and emitted to the outside after being radiated by the radio wave radiating unit 102 as the radio wave emitted by the virtual array 170 composed of a plurality of virtual antennas 150, by executing synthetic aperture processing based on a plurality of measurement data selected in S208. The information processing device 300 executes synthetic aperture processing, for example, using the following mathematical formula.

[0143] [Number]

[0144] [Number] is the electric field strength of the vertically polarized wave component of the radio wave emitted by the virtual antenna 150 and received by the antenna device 200 when the rotation angle of the reflecting unit 104 is the emission target rotation angle. φ Tx +φ SC_Tx is the emission target rotation angle. φ SC_Tx is the offset angle. E V (φ Tx +θ n_Tx ) is the electric field strength of the vertically polarized wave component of the radio wave emitted by the virtual antenna 150 and received by the antenna device 200 when the first measurement angle of the reflecting unit 104 is φ Tx +θ n_Tx . θ n_Tx is n_Tx×AS Tx is. wn_Tx is a Gaussian window. k SC_Tx is the wave number vector of the radio wave emitted by the virtual antenna 150 when the rotation angle of the reflecting part 104 is the emission target rotation angle. R n_Tx is the first measurement angle of the reflecting part 104 being φ Tx +θ n_Tx is the position vector of the virtual antenna 150 when it is. R Tx is the distance from the reflecting part 104 to the virtual antenna 150. σ Tx is the Gaussian window w n_Tx is the standard deviation defining the width of.

[0145] The information processing device 300 may determine the electric field strength of the horizontally polarized wave component of the radio wave emitted by the virtual antenna 150 when the rotation angle of the reflecting part 104 is the emission target rotation angle and received by the antenna device 200. In this case, the mathematical formula of the above synthetic aperture processing is transformed as follows.

[0146]

Equation

[0147]

Equation

[0148] As shown in the mathematical formula of the above synthetic aperture processing, k SC_Tx and R n_Tx include φ Tx . Therefore, k SC_Tx and Rn_Tx φ included in Tx Even if k is omitted SC_Tx and R n_Tx Since the angle between the two does not change, k SC_Tx ·R n_Tx The value of does not change. From the above, the above formula for the synthetic aperture processing may be modified as shown in the following formula.

[0149]

number

[0150] The information processing device 300 determines, for example, radio waves emitted by the antenna device 100 and received by the antenna device 200 when the rotation angle of the reflector 104 is each of a plurality of emission target rotation angles at predetermined angular intervals. The angular intervals are φ step_Tx The angle interval may be equal to AS Tx There may be a smaller angular interval.

[0151] Here, φ Tx =0°, A.S. Tx = 2°, and φ step_Tx When φ=0.1°, the information processing device 300 SC_Tx An example of a process for determining radio waves emitted by the antenna device 100 and received by the antenna device 200 when the rotation angle of the reflector 104 is each of a plurality of emission target rotation angles by scanning the reflector 104 will be described below. In this case, the plurality of emission target rotation angles are 19 rotation angles of 0.1°, 0.2°, . . . , 1.8°, and 1.9°.

[0152] First, the information processing device 300 calculates φ SC_Tx =0.1°, the information processing device 300 determines the radio waves emitted by the antenna device 100 and received by the antenna device 200 when the rotation angle of the reflector 104 is 0.1°. Next, the information processing device 300 determines the radio waves emitted by the antenna device 100 and received by the antenna device 200 when the rotation angle of the reflector 104 is 0.1°. SC_Tx φ step_TxBy only performing scanning, the radio wave emitted by the antenna device 100 and received by the antenna device 200 when the rotation angle of the reflection unit 104 is 0.2° is determined. Thereafter, the information processing device 300 similarly scans φ SC_Tx and determines the radio wave emitted by the antenna device 100 and received by the antenna device 200 when the rotation angle of the reflection unit 104 is 1.9°.

[0153] In S212, the information processing device 300, based on the electric field strength of the radio wave emitted by the antenna device 100 at a plurality of first measurement angles of the reflection unit 104 and received by the antenna device 200, which is included in the plurality of measurement data selected in S208, and the electric field strength of the radio wave emitted by the antenna device 100 and received by the antenna device 200 when the rotation angle of the reflection unit 104 is each emission target rotation angle of the plurality of emission target rotation angles determined in S210, determines the rotation angle of the reflection unit 104 when the radio wave emitted by the antenna device 100 arrives at the antenna device 200 with the maximum electric field strength. For example, when AS Tx = 2° and φ step_Tx = 0.1°, the information processing device 300, based on the electric field strength of the radio wave emitted by the antenna device 100 at 2N_Tx + 1 measurement angles of the reflection unit 104 and received by the antenna device 200, and the electric field strength of the radio wave emitted by the antenna device 100 and received by the antenna device 200 when the rotation angle of the reflection unit 104 is each emission target rotation angle of 2N_Tx × 19 emission target rotation angles, determines the rotation angle of the reflection unit 202 when the radio wave emitted by the antenna device 100 arrives at the antenna device 200 with the maximum electric field strength.

[0154] In an example of the processing flow of the system 10 in FIG. 13, the antenna device 100 and the antenna device 200 may be replaced. That is, in an example of the processing flow of the system 10 in FIG. 13, the antenna device 200 may be used as the antenna device that emits radio waves, and the antenna device 100 may be used as the antenna device that receives radio waves.

[0155] FIG. 14 is an explanatory diagram for explaining another example of the processing flow of the system 10. Here, the starting state is a state where the information processing apparatus 300 has not acquired measurement data.

[0156] In S302, the antenna device 100 emits radio waves by the reflecting portion 104 reflecting the radio waves radiated by the radio wave radiating portion 102 at a plurality of first measurement angles. While the antenna device 100 is emitting radio waves at the first measurement angles of the plurality of reflecting portions 104, the antenna device 200 receives the radio waves emitted by the antenna device 100 at a plurality of second measurement angles.

[0157] For example, while the antenna device 100 is emitting radio waves at the first measurement angles of the plurality of reflecting portions 104, the angle changing portion 108 rotates the mounting portion 107 only once around the radio wave radiating portion 102, and the angle changing portion 208 rotates the reflecting portion 202 by 180 rotations with respect to the radio wave receiving portion 204. In the case where AS Tx = 2° and AS Rx = 2°, the antenna device 200 receives the radio waves emitted at one of the first measurement angles of the reflecting portion 104 by the antenna device 100 at the second measurement angles of the 180 reflecting portions 202. The angle changing portion 208 rotates the reflecting portion 202 with respect to the radio wave receiving portion 204 so that the antenna device 200 receives the radio waves emitted at one of the first measurement angles of the reflecting portion 104 by the antenna device 100 at the second measurement angles of the 180 reflecting portions 202. The angle changing portion 108 rotates the mounting portion 107 around the radio wave radiating portion 102 in response to the antenna device 200 receiving the radio waves emitted at one of the first measurement angles of the reflecting portion 104 by the antenna device 100 at the second measurement angles of the 180 reflecting portions 202.

[0158] For example, the radio wave receiving portion 204 receives the radio waves reflected and emitted by the reflecting portion 104 when θ Tx = -180° as the radio waves reflected by the reflecting portion 202 when θ Rx = -180°, θ TxThe radio wave reflected and emitted by the reflection part 104 when it is θ = -180° Rx The radio wave reflected by the reflection part 202 when it is θ = -178°, θ Tx The radio wave reflected and emitted by the reflection part 104 when it is θ = -180° Rx The radio wave reflected by the reflection part 202 when it is θ = -176°, ···, θ Tx The radio wave reflected and emitted by the reflection part 104 when it is θ = -180° Rx The radio wave reflected by the reflection part 202 when it is θ = 174°, θ Tx The radio wave reflected and emitted by the reflection part 104 when it is θ = -180° Rx The radio wave reflected by the reflection part 202 when it is θ = 176°, and, θ Tx The radio wave reflected and emitted by the reflection part 104 when it is θ = -180° Rx Receives the radio wave reflected by the reflection part 202 when it is θ = 178°.

[0159] Next, the radio wave receiving unit 204 receives θ Tx The radio wave reflected and emitted by the reflection part 104 when it is θ = -178° Rx The radio wave reflected by the reflection part 202 when it is θ = -180°, θ Tx The radio wave reflected and emitted by the reflection part 104 when it is θ = -178° Rx The radio wave reflected by the reflection part 202 when it is θ = -178°, θ Tx The radio wave reflected and emitted by the reflection part 104 when it is θ = -178° Rx The radio wave reflected by the reflection part 202 when it is θ = -176°, ···, θ Tx The radio wave reflected and emitted by the reflection part 104 when it is θ = -178° Rx The radio wave reflected by the reflection part 202 when it is θ = 174°, θ Tx The radio wave reflected and emitted by the reflection part 104 when it is θ = -178° Rx The radio wave reflected by the reflection part 202 when it is θ = 176°, and, θ Tx The radio wave reflected and emitted by the reflection part 104 when it is θ = -178° Rx Receives the radio wave reflected by the reflection part 202 when it is θ = 178°. Thereafter, the radio wave receiving unit 204 receives θTx The radio wave reflected and emitted by the reflecting portion 104 when θ = -178° Rx The same process is repeated until the radio wave reflected by the reflecting portion 202 when θ = 178° is received.

[0160] In S304, the VNA 500 measures the electric field strength of the radio wave received by the antenna device 200 while the antenna device 100 emits radio waves at the first measurement angles of the plurality of reflecting portions 104 in S302. For example, the VNA 500 measures the electric field strength of the radio wave reflected and emitted by the reflecting portion 104 when θ = -180°, the electric field strength of the radio wave reflected by the reflecting portion 202 and received by the radio wave receiving portion 204 when θ = -180°, the electric field strength of the radio wave reflected and emitted by the reflecting portion 104 when θ = -180°, the electric field strength of the radio wave reflected by the reflecting portion 202 and received by the radio wave receiving portion 204 when θ = -178°, the electric field strength of the radio wave reflected and emitted by the reflecting portion 104 when θ = -180°, the electric field strength of the radio wave reflected by the reflecting portion 202 and received by the radio wave receiving portion 204 when θ = -176°, ···, the electric field strength of the radio wave reflected and emitted by the reflecting portion 104 when θ = 178°, the electric field strength of the radio wave reflected by the reflecting portion 202 and received by the radio wave receiving portion 204 when θ = 174°, the electric field strength of the radio wave reflected and emitted by the reflecting portion 104 when θ = 178°, the electric field strength of the radio wave reflected by the reflecting portion 202 and received by the radio wave receiving portion 204 when θ = 176°, and the electric field strength of the radio wave reflected and emitted by the reflecting portion 104 when θ = 178° and the electric field strength of the radio wave reflected by the reflecting portion 202 and received by the radio wave receiving portion 204 when θ = 178°. Tx The radio wave reflected and emitted by the reflecting portion 104 when θ = -180° Rx The electric field strength of the radio wave reflected by the reflecting portion 202 and received by the radio wave receiving portion 204 when θ = -180° Tx The radio wave reflected and emitted by the reflecting portion 104 when θ = -180° Rx The electric field strength of the radio wave reflected by the reflecting portion 202 and received by the radio wave receiving portion 204 when θ = -178° Tx The radio wave reflected and emitted by the reflecting portion 104 when θ = -180° Rx The electric field strength of the radio wave reflected by the reflecting portion 202 and received by the radio wave receiving portion 204 when θ = -176°, ··· Tx The radio wave reflected and emitted by the reflecting portion 104 when θ = 178° Rx The electric field strength of the radio wave reflected by the reflecting portion 202 and received by the radio wave receiving portion 204 when θ = 174° Tx The radio wave reflected and emitted by the reflecting portion 104 when θ = 178° Rx The electric field strength of the radio wave reflected by the reflecting portion 202 and received by the radio wave receiving portion 204 when θ = 176°, and Tx The radio wave reflected and emitted by the reflecting portion 104 when θ = 178° Rx The electric field strength of the radio wave reflected by the reflecting portion 202 and received by the radio wave receiving portion 204 when θ = 178° is measured.

[0161] In S306, the information processing device 300 acquires a plurality of measurement data measured by the VNA 500 in S304 from the VNA 500. For example, the information processing device 300 acquires the measurement data when θ = -180°, the measurement data when θ = -178°, ···, the measurement data when θ = 178°. TxWhen it is -180°, the radio wave reflected and emitted by the reflection part 104 is θ Rx Measurement data obtained by measuring the electric field strength of the radio wave received by the radio wave receiving part 204 after being reflected by the reflection part 202 when it is -180°, θ Tx When it is -180°, the radio wave reflected and emitted by the reflection part 104 is θ Rx Measurement data obtained by measuring the electric field strength of the radio wave received by the radio wave receiving part 204 after being reflected by the reflection part 202 when it is -178°, θ Tx When it is -180°, the radio wave reflected and emitted by the reflection part 104 is θ Rx Measurement data obtained by measuring the electric field strength of the radio wave received by the radio wave receiving part 204 after being reflected by the reflection part 202 when it is -176°, ···, θ Tx When it is 178°, the radio wave reflected and emitted by the reflection part 104 is θ Rx Measurement data obtained by measuring the electric field strength of the radio wave received by the radio wave receiving part 204 after being reflected by the reflection part 202 when it is 174°, θ Tx When it is 178°, the radio wave reflected and emitted by the reflection part 104 is θ Rx Measurement data obtained by measuring the electric field strength of the radio wave received by the radio wave receiving part 204 after being reflected by the reflection part 202 when it is 176°, and, θ Tx When it is 178°, the radio wave reflected and emitted by the reflection part 104 is θ Rx 180×180 pieces of measurement data including the measurement data obtained by measuring the electric field strength of the radio wave received by the radio wave receiving part 204 after being reflected by the reflection part 202 when it is 178° are acquired.

[0162] In S308, the information processing device 300 executes a base conversion process on each piece of measurement data of the plurality of measurement data acquired from the VNA500 in S306. For example, the information processing device 300 determines the second measurement angle φ which is the center of the plurality of second measurement angles of the reflection part 202 corresponding to the plurality of measurement data, and executes a base conversion process on each piece of measurement data of the plurality of measurement data using the following mathematical formula. Rx To execute a base conversion process on each piece of measurement data of the plurality of measurement data using the following mathematical formula.

[0163]

Equation

[0164] E V (φ Rx +θ n_Rx, φ Tx +θ n_Tx is the electric field strength of the vertically polarized component of the radio wave received by the radio wave receiving unit 204 when the first measurement angle of the reflecting unit 104 is φ Tx +θ n_Tx and the second measurement angle of the reflecting unit 202 is φ Rx +θ n_Rx and the radio wave is emitted by the antenna device 100. E H (φ Rx +θ n_Rx, φ Tx +θ n_Tx is the electric field strength of the horizontally polarized component of the radio wave received by the radio wave receiving unit 204 when the first measurement angle of the reflecting unit 104 is φ Tx +θ n_Tx and the second measurement angle of the reflecting unit 202 is φ Rx +θ n_Rx and the radio wave is emitted by the antenna device 100. E Rx1 (φ Rx +θ n_Rx, φ Tx +θ n_Tx is the electric field strength of the radio wave measured by the VNA 500 at terminal 1 of the VNA 500, which is included in the measurement data of the electric field strength of the radio wave received by the radio wave receiving unit 204 when the first measurement angle of the reflecting unit 104 is φ Tx +θ n_Tx and the second measurement angle of the reflecting unit 202 is φ Rx +θ n_Rx and the radio wave is emitted by the antenna device 100. E Rx2 (φ Rx +θ n_Rx, φ Tx +θ n_Tx is the electric field strength of the radio wave measured by the VNA 500 at terminal 2 of the VNA 500, which is included in the said measurement data.

[0165] In S310, the information processing apparatus 300 selects a plurality of measurement data used to determine the radio wave that is transmitted by the antenna apparatus 100 when the rotation angle of the reflection unit 104 is the emission target rotation angle and received by the antenna apparatus 200 when the rotation angle of the reflection unit 202 is the reception target rotation angle, from among the plurality of measurement data for which the base conversion process has been executed in S308. For example, the information processing apparatus 300 determines φ Tx which is the first measurement angle at the center of the plurality of first measurement angles of the reflection unit 104 corresponding to the plurality of measurement data for which the base conversion process has been executed in S308. For example, the information processing apparatus 300 measures the electric field strength of the radio wave received by the radio wave receiving unit 204 when the radio wave is transmitted by the antenna apparatus 100 when the first measurement angle of the reflection unit 104 is φ Tx and the second measurement angle of the reflection unit 202 is φ Rx , and selects the measurement data centered around this measurement data.

[0166] For example, the information processing apparatus 300 measures the electric field strength of the radio wave received by the radio wave receiving unit 204 when the radio wave is transmitted by the antenna apparatus 100 when the first measurement angle of the reflection unit 104 is φ Tx and the second measurement angle of the reflection unit 202 is φ Rx +θ 1 , the measurement data obtained by measuring the electric field strength of the radio wave received by the radio wave receiving unit 204 when the radio wave is transmitted by the antenna apparatus 100 when the first measurement angle of the reflection unit 104 is φ Tx and the second measurement angle of the reflection unit 202 is φ Rx +θ 2 , ···, the measurement data obtained by measuring the electric field strength of the radio wave received by the radio wave receiving unit 204 when the radio wave is transmitted by the antenna apparatus 100 when the first measurement angle of the reflection unit 104 is φ Tx and the second measurement angle of the reflection unit 202 is φ Rx +θ N_Rx-2 , the measurement data obtained by measuring the electric field strength of the radio wave received by the radio wave receiving unit 204 when the radio wave is transmitted by the antenna apparatus 100 when the first measurement angle of the reflection unit 104 is φ Tx and the second measurement angle of the reflection unit 202 is φ Rx+θ N_Rx-1 Measurement data obtained by measuring the electric field strength of the radio wave received by the radio wave receiving unit 204 when it is, and the first measurement angle of the reflecting unit 104 is φ Tx Emitted by the antenna device 100 when it is and the second measurement angle of the reflecting unit 202 is φ Rx +θ N_Rx Measurement data obtained by measuring the electric field strength of the radio wave received by the radio wave receiving unit 204 when it is, including the first measurement angle of the reflecting unit 104 being φ Tx Select N_Rx pieces of measurement data when the first measurement angle of the reflecting unit 104 is φ. Further, the information processing device 300 has the first measurement angle of the reflecting unit 104 being φ Tx Emitted by the antenna device 100 when it is and the second measurement angle of the reflecting unit 202 is φ Rx +θ -1 Measurement data obtained by measuring the electric field strength of the radio wave received by the radio wave receiving unit 204 when it is, the first measurement angle of the reflecting unit 104 being φ Tx Emitted by the antenna device 100 when it is and the second measurement angle of the reflecting unit 202 is φ Rx +θ -2 Measurement data obtained by measuring the electric field strength of the radio wave received by the radio wave receiving unit 204 when it is, ···, the first measurement angle of the reflecting unit 104 being φ Tx Emitted by the antenna device 100 when it is and the second measurement angle of the reflecting unit 202 is φ Rx +θ -(N_Rx-2) Measurement data obtained by measuring the electric field strength of the radio wave received by the radio wave receiving unit 204 when it is, the first measurement angle of the reflecting unit 104 being φ Tx Emitted by the antenna device 100 when it is and the second measurement angle of the reflecting unit 202 is φ Rx +θ -(N_Rx-1) Measurement data obtained by measuring the electric field strength of the radio wave received by the radio wave receiving unit 204 when it is, and the first measurement angle of the reflecting unit 104 being φ Tx Emitted by the antenna device 100 when it is and the second measurement angle of the reflecting unit 202 is φ Rx +θ -N_Rx Measurement data obtained by measuring the electric field strength of the radio wave received by the radio wave receiving unit 204 when it is, including the first measurement angle of the reflecting unit 104 being φ TxSelect N_Rx pieces of measurement data when it is as such. As a result, the information processing apparatus 300 has the first measurement angle of the reflection unit 104 as φ Tx Select 2N_Rx + 1 pieces of measurement data when it is as such.

[0167] Next, the information processing apparatus 300, in the same manner, has the first measurement angle of the reflection unit 104 as φ Tx + θ 1 Select 2N_Rx + 1 pieces of measurement data when it is as such, 2N_Rx + 1 pieces of measurement data when the first measurement angle of the reflection unit 104 is φ Tx + θ 2 Select 2N_Rx + 1 pieces of measurement data when it is as such, ···, 2N_Rx + 1 pieces of measurement data when the first measurement angle of the reflection unit 104 is φ Tx + θ N_Tx-2 Select 2N_Rx + 1 pieces of measurement data when it is as such, 2N_Rx + 1 pieces of measurement data when the first measurement angle of the reflection unit 104 is φ Tx + θ N_Tx-1 Select 2N_Rx + 1 pieces of measurement data when it is as such, and 2N_Rx + 1 pieces of measurement data when the first measurement angle of the reflection unit 104 is φ Tx + θ N_Tx Select 2N_Rx + 1 pieces of measurement data when it is as such. Also, the information processing apparatus 300, in the same manner, has the first measurement angle of the reflection unit 104 as φ Tx + θ -1 Select 2N_Rx + 1 pieces of measurement data when it is as such, 2N_Rx + 1 pieces of measurement data when the first measurement angle of the reflection unit 104 is φ Tx + θ -2 Select 2N_Rx + 1 pieces of measurement data when it is as such, ···, 2N_Rx + 1 pieces of measurement data when the first measurement angle of the reflection unit 104 is φ Tx + θ -(N_Tx-2) Select 2N_Rx + 1 pieces of measurement data when it is as such, 2N_Rx + 1 pieces of measurement data when the first measurement angle of the reflection unit 104 is φ Tx + θ -(N_Tx-1) Select 2N_Rx + 1 pieces of measurement data when it is as such, and 2N_Rx + 1 pieces of measurement data when the first measurement angle of the reflection unit 104 is φ Tx + θ -N_Tx Select 2N_Rx + 1 pieces of measurement data when it is as such. As a result, 300 selects (2N_Tx + 1) × (2N_Rx + 1) pieces of measurement data.

[0168] In S312, based on the plurality of measurement data selected in S310, the information processing apparatus 300 determines the radio wave that is emitted by the antenna apparatus 100 when the rotation angle of the reflection unit 104 is the emission target rotation angle and is received by the antenna apparatus 200 when the rotation angle of the reflection unit 202 is the reception target rotation angle. For example, the information processing apparatus 300 determines the radio wave that is emitted by the antenna apparatus 100 when the rotation angle of the reflection unit 104 is the emission target rotation angle and is received by the antenna apparatus 200 when the rotation angle of the reflection unit 202 is the reception target rotation angle, based on (2N_Tx + 1) × (2N_Rx + 1) pieces of measurement data.

[0169] For example, the information processing apparatus 300 executes synthetic aperture processing based on the plurality of measurement data selected in S310, and regards the radio wave reflected by the reflection unit 104 at a first measurement angle and emitted to the outside as the radio wave emitted by the virtual antenna 150, and regards the radio wave reflected by the reflection unit 202 at a second measurement angle and received by the radio wave reception unit 204 as the radio wave received by the virtual antenna 250, thereby determining the radio wave that is emitted by the antenna apparatus 100 when the rotation angle of the reflection unit 104 is the emission target rotation angle and is received by the antenna apparatus 200 when the rotation angle of the reflection unit 202 is the reception target rotation angle. For example, the information processing apparatus 300 executes synthetic aperture processing based on the plurality of measurement data selected in S310, and regards the radio wave reflected by the reflection unit 104 at a plurality of first measurement angles and emitted to the outside as the radio wave emitted by the virtual array 170 composed of a plurality of virtual antennas 150, and regards the radio wave reflected by the reflection unit 202 at a plurality of second measurement angles and received by the radio wave reception unit 204 as the radio wave received by the virtual array 270 composed of a plurality of virtual antennas 250, thereby determining the radio wave that is emitted by the antenna apparatus 100 when the rotation angle of the reflection unit 104 is the emission target rotation angle and is received by the antenna apparatus 200 when the rotation angle of the reflection unit 202 is the reception target rotation angle. For example, the information processing apparatus 300 executes synthetic aperture processing using the following mathematical formula.

[0170]

Number

[0171]

Number

[0172] The information processing apparatus 300 may determine the electric field strength of the horizontally polarized wave component of the radio wave transmitted by the virtual antenna 150 when the rotation angle of the reflection unit 104 is the emission target rotation angle and received by the virtual antenna 250 when the rotation angle of the reflection unit 202 is the reception target rotation angle. In this case, the mathematical formula of the above synthetic aperture processing is deformed as the following mathematical formula.

[0173]

Number

[0174]

Number

[0175] As shown in the formula of the above synthetic aperture processing, k SC_Tx and R n_Tx include φ Tx and k SC_Rx and R n_Rx include φ Rx . Therefore, even if φ SC_Tx included in k n_Tx and R Tx is omitted, the angle formed by k SC_Tx and R n_Tx does not change, so the value of k SC_Tx ·R n_Tx does not change. Even if φ SC_Rx included in k n_Rx and R Rx is omitted, the angle formed by k SC_Rx and R n_Rx does not change, so the value of k SC_Rx ·R n_Rx does not change. From the above, the formula of the above synthetic aperture processing may be transformed as follows.

[0176]

Equation

[0177] The information processing apparatus 300 determines, for example, radio waves transmitted by the antenna apparatus 100 when the rotation angle of the reflection unit 104 is each of a plurality of emission target rotation angles at predetermined angular intervals, and received by the antenna apparatus 200 when the rotation angle of the reflection unit 202 is each of a plurality of reception target rotation angles at predetermined angular intervals. Here, φ Tx = 0°, φ Rx = 0°, AS Tx = 2°, AS Rx = 2°, φ step_Tx = 0.1°, and φ step_Rx = 0.1°, an example of a process in which the information processing apparatus 300 determines radio waves transmitted by the antenna apparatus 100 when the rotation angle of the reflection unit 104 is each of a plurality of emission target rotation angles at predetermined angular intervals and received by the antenna apparatus 200 when the rotation angle of the reflection unit 202 is each of a plurality of reception target rotation angles by scanning φ SC_Tx and φ SC_Rx will be described. In this case, the plurality of emission target rotation angles are 19 rotation angles of 0.1°, 0.2°, ···, 1.8°, and 1.9°, and the plurality of reception target rotation angles are 19 rotation angles of 0.1°, 0.2°, ···, 1.8°, and 1.9°.

[0178] First, the information processing apparatus 300 sets φ SC_Tx = 0.1° and φ SC_Rx = 0.1° to determine radio waves transmitted by the antenna apparatus 100 when the rotation angle of the reflection unit 104 is 0.1° and received by the antenna apparatus 200 when the rotation angle of the reflection unit 202 is 0.1°. Next, the information processing apparatus 300 scans φ SC_Rx by φ step_Rx to determine radio waves transmitted by the antenna apparatus 100 when the rotation angle of the reflection unit 104 is 0.1° and received by the antenna apparatus 200 when the rotation angle of the reflection unit 202 is 0.2°. Thereafter, the information processing apparatus 300 similarly φSC_Rx By scanning, the radio wave emitted by the antenna device 100 when the rotation angle of the reflecting part 104 is 0.1° and received by the antenna device 200 when the rotation angle of the reflecting part 202 is 1.9° is determined.

[0179] Next, the information processing device 300 scans φ SC_Tx by φ step_Tx and sets φ SC_Rx =0.1° to determine the radio wave emitted by the antenna device 100 when the rotation angle of the reflecting part 104 is 0.2° and received by the antenna device 200 when the rotation angle of the reflecting part 202 is 0.1°. Thereafter, the information processing device 300 similarly scans φ SC_Rx to determine the radio wave emitted by the antenna device 100 when the rotation angle of the reflecting part 104 is 0.2° and received by the antenna device 200 when the rotation angle of the reflecting part 202 is 1.9°. Thereafter, the information processing device 300 similarly scans φ SC_Tx and φ SC_Rx to determine the radio wave emitted by the antenna device 100 when the rotation angle of the reflecting part 104 is 1.9° and received by the antenna device 200 when the rotation angle of the reflecting part 202 is 1.9°.

[0180] In S312, the information processing device 300 may determine the radio wave emitted by the antenna device 100 at each of the plurality of first measurement angles of the reflecting part 104 and received by the antenna device 200 when the rotation angle of the reflecting part 202 is at each of the plurality of reception target rotation angles based on the plurality of measurement data selected in S310. The information processing device 300 may determine the radio wave emitted by the antenna device 100 at each of the plurality of first measurement angles of the reflecting part 104 and received by the antenna device 200 when the rotation angle of the reflecting part 202 is at each of the plurality of reception target rotation angles in the same manner as S112 in an example of the processing flow of the system 10 shown in FIG. 12.

[0181] In S312, based on the plurality of measurement data selected in S310, the information processing apparatus 300 may determine radio waves that are emitted by the antenna apparatus 100 and received by the antenna apparatus 200 at each of the plurality of second measurement angles of the reflection unit 202 when the rotation angle of the reflection unit 104 is each of the plurality of emission target rotation angles. The information processing apparatus 300 may determine radio waves that are emitted by the antenna apparatus 100 and received by the antenna apparatus 200 at each of the plurality of second measurement angles of the reflection unit 202 in the same manner as S210 in an example of the processing flow of the system 10 shown in FIG. 13 when the rotation angle of the reflection unit 104 is each of the plurality of emission target rotation angles.

[0182] In S314, the information processing apparatus 300 is based on the electric field strength of radio waves that are emitted by the antenna apparatus 100 at the plurality of first measurement angles of the reflection unit 104 and received by the antenna apparatus 200 at the plurality of second measurement angles of the reflection unit 202, which are included in the plurality of measurement data selected in S310, and the electric field strength of radio waves that are emitted by the antenna apparatus 100 and received by the antenna apparatus 200 when the rotation angle of the reflection unit 202 is each of the plurality of reception target rotation angles determined in S312 when the rotation angle of the reflection unit 104 is each of the plurality of emission target rotation angles, and determines a combination of the rotation angle of the reflection unit 104 and the rotation angle of the reflection unit 202 when the radio waves emitted by the antenna apparatus 100 arrive at the antenna apparatus 200 with the maximum electric field strength. For example, AS Tx = 2°, AS Rx = 2°, φ step_Tx = 0.1°, and φ step_RxWhen it is = 0.1°, the information processing apparatus 300 determines, based on the electric field strength of the radio wave that is emitted at the 2N_Tx + 1 first measurement angles of the reflection unit 104 by the antenna apparatus 100 and received at the 2N_Rx + 1 second measurement angles of the reflection unit 202 by the antenna apparatus 200, and the electric field strength of the radio wave that is emitted by the antenna apparatus 100 at the emission target rotation angles of 2N_Tx × 19 where the rotation angle of the reflection unit 104 is and received by the antenna apparatus 200 at each reception target rotation angle where the rotation angle of the reflection unit 202 is the reception target rotation angles of 2N_Rx × 19, a combination of the rotation angle of the reflection unit 104 and the rotation angle of the reflection unit 202 when the radio wave emitted by the antenna apparatus 100 arrives at the antenna apparatus 200 with the maximum electric field strength.

[0183] In S314, the information processing apparatus 300 may determine, based further on the electric field strength of the radio wave that is emitted at each of the plurality of first measurement angles of the reflection unit 104 by the antenna apparatus 100 determined in S312 and received by the antenna apparatus 200 when the rotation angle of the reflection unit 202 is each of the plurality of reception target rotation angles, a combination of the rotation angle of the reflection unit 104 and the rotation angle of the reflection unit 202 when the radio wave emitted by the antenna apparatus 100 arrives at the antenna apparatus 200 with the maximum electric field strength. In S314, the information processing apparatus 300 may determine, based further on the electric field strength of the radio wave that is emitted by the antenna apparatus 100 when the rotation angle of the reflection unit 104 is each of the plurality of emission target rotation angles determined in S312 and received at each of the plurality of second measurement angles of the reflection unit 202 by the antenna apparatus 200, a combination of the rotation angle of the reflection unit 104 and the rotation angle of the reflection unit 202 when the radio wave emitted by the antenna apparatus 100 arrives at the antenna apparatus 200 with the maximum electric field strength.

[0184] According to the system 10 shown in FIG. 14, the information processing apparatus 300 determines the radio wave transmitted by the antenna apparatus 100 when the rotation angle of the reflection unit 104 is the emission target rotation angle and received by the antenna apparatus 200 when the rotation angle of the reflection unit 202 is the reception target rotation angle, based on a plurality of measurement data measured by the antenna apparatus 200 receiving the radio wave emitted at each of the plurality of first measurement angles of the reflection unit 104 by the antenna apparatus 100 at the plurality of second measurement angles of the antenna apparatus 200. Thereby, the system 10 shown in FIG. 14 can determine the arrival direction of the radio wave with higher precision using a small number of measurement data.

[0185] FIG. 15 shows an example of a simulation result of simulating the radio wave received by the antenna apparatus 200. In the example shown in FIG. 15, assume that the combination of the rotation angle of the reflection unit 104 and the rotation angle of the reflection unit 202 when the radio wave transmitted by the antenna apparatus 100 arrives at the antenna apparatus 200 with the maximum electric field strength is such that the rotation angle of the reflection unit 104 = -90° and the rotation angle of the reflection unit 202 = 90°.

[0186] The horizontal axis of the graph shown in FIG. 15 is the rotation angle [°] of the reflection unit 202. The vertical axis of the graph shown in FIG. 15 is the rotation angle [°] of the reflection unit 104. The graph shown in FIG. 15 shows an example of the correspondence between the combination of the rotation angle of the reflection unit 104 and the rotation angle of the reflection unit 202 and the electric field strength [dB] of the vertically polarized wave component of the radio wave received by the radio wave receiving unit 204.

[0187] The upper diagram of FIG. 15 shows an example of a simulation result of simulating the radio wave received by the antenna apparatus 200 when the synthetic aperture process is not executed. The lower diagram of FIG. 15 shows an example of a simulation result of simulating the radio wave received by the antenna apparatus 200 when the synthetic aperture process is executed. As shown by the two simulation results, the system 10 according to the present embodiment can determine the arrival direction of the radio wave with high precision using a small number of measurement data by executing the synthetic aperture process.

[0188] FIG. 16 schematically shows an example of the functional configuration of the information processing apparatus 300. The information processing apparatus 300 includes an acquisition unit 302, a storage unit 304, a determination unit 306, and a selection unit 308. Note that it is not always essential for the information processing apparatus 300 to have all of these configurations.

[0189] The acquisition unit 302 acquires various types of data. The acquisition unit 302 acquires measurement data from, for example, the VNA 500. The acquisition unit 302 acquires angle data from, for example, the angle controller 400. The acquisition unit 302 may store the acquired various types of data in the storage unit 304.

[0190] The acquisition unit 302 acquires a plurality of measurement data measured, for example, by the antenna device 200 receiving the radio wave emitted at the first measurement angle of the reflection unit 104 by the antenna device 100 at a plurality of second measurement angles of the reflection unit 202. The acquisition unit 302 acquires a plurality of measurement data measured, for example, by the antenna device 200 receiving the radio wave emitted at each of the plurality of first measurement angles of the reflection unit 104 by the antenna device 100 at the second measurement angle of the reflection unit 202. The acquisition unit 302 acquires a plurality of measurement data measured, for example, by the antenna device 200 receiving the radio wave emitted at each of the plurality of first measurement angles of the reflection unit 104 by the antenna device 100 at a plurality of second measurement angles of the reflection unit 202.

[0191] The determination unit 306 determines the radio wave received by the antenna device 200. The determination unit 306 determines the radio wave received by the antenna device 200, for example, based on a plurality of measurement data stored in the storage unit 304.

[0192] The determination unit 306 determines the radio wave received by the antenna device 200, for example, by performing a base conversion process on each of the plurality of measurement data. For example, the determination unit 306 is φ, which is the measurement angle at the center of the plurality of second measurement angles of the reflection unit 202 corresponding to the plurality of measurement data. RxDetermine it. Then, the determination unit 306 executes a basis conversion process on each of the plurality of measurement data using the above-described mathematical formula.

[0193] The determination unit 306 determines, for example, the radio wave that is emitted by the antenna device 100 when the rotation angle of the reflection unit 104 is the first measurement angle and that is received by the antenna device 200 when the rotation angle of the reflection unit 202 is the reception target rotation angle. The determination unit 306 determines, for example, based on the plurality of measurement data measured by the antenna device 200 receiving the radio wave emitted by the antenna device 100 at the first measurement angle of the reflection unit 104 at a plurality of second measurement angles of the reflection unit 202 and stored in the storage unit 304, the radio wave that is emitted by the antenna device 100 when the rotation angle of the reflection unit 104 is the first measurement angle and that is received by the antenna device 200 when the rotation angle of the reflection unit 202 is the reception target rotation angle.

[0194] The determination unit 306 determines, for example, the radio wave transmitted by the antenna device 100 when the rotation angle of the reflection unit 104 is the first measurement angle and received by the antenna device 200 when the rotation angle of the reflection unit 202 is the reception target rotation angle, based on the radio wave when the radio wave transmitted at the first measurement angle of the reflection unit 104 by the antenna device 100 and received at a plurality of second measurement angles of the reflection unit 202 by the antenna device 200 is synthesized. For example, the determination unit 306 executes synthetic aperture processing based on the plurality of measurement data, and regards the radio wave reflected by the reflection unit 202 and received by the radio wave reception unit 204 as the radio wave received by the virtual antenna 250, thereby determining the radio wave transmitted by the antenna device 100 when the rotation angle of the reflection unit 104 is the first measurement angle and received by the antenna device 200 when the rotation angle of the reflection unit 202 is the reception target rotation angle. For example, the determination unit 306 executes synthetic aperture processing based on the plurality of measurement data, and regards the radio wave reflected by the reflection unit 202 at a plurality of second measurement angles and received by the radio wave reception unit 204 as the radio wave received by the virtual array 270 composed of a plurality of virtual antennas 250, thereby determining the radio wave transmitted by the antenna device 100 when the rotation angle of the reflection unit 104 is the first measurement angle and received by the antenna device 200 when the rotation angle of the reflection unit 202 is the reception target rotation angle. For example, the determination unit 306 executes synthetic aperture processing using the foregoing mathematical formula.

[0195] The determination unit 306 determines, for example, the radio wave transmitted by the antenna device 100 when the rotation angle of the reflection unit 104 is each of a plurality of first measurement angles and received by the antenna device 200 when the rotation angle of the reflection unit 202 is the reception target rotation angle. The determination unit 306 determines, for example, based on a plurality of measurement data measured by the antenna device 200 receiving, at each of a plurality of second measurement angles of the reflection unit 202, the radio wave transmitted by the antenna device 100 at each of the plurality of first measurement angles of the reflection unit 104 stored in the storage unit 304, the radio wave transmitted by the antenna device 100 when the rotation angle of the reflection unit 104 is each of the plurality of first measurement angles and received by the antenna device 200 when the rotation angle of the reflection unit 202 is the reception target rotation angle.

[0196] The determination unit 306 determines, for example, the radio wave received by the antenna device 200 when the antenna device 100 transmits at the first measurement angle of the reflection unit 104 and the rotation angle of the reflection unit 202 is each of a plurality of reception target rotation angles. The determination unit 306 determines, for example, the radio wave received by the antenna device 200 when the antenna device 100 transmits at the first measurement angle of the reflection unit 104 and the rotation angle of the reflection unit 202 is each of a plurality of reception target rotation angles at a predetermined angular interval. The determination unit 306, for example, SC_Rx by scanning φ, determines the radio wave received by the antenna device 200 when the antenna device 100 transmits at the first measurement angle of the reflection unit 104 and the rotation angle of the reflection unit 202 is each of a plurality of reception target rotation angles. The determination unit 306, for example, uses the angle controller 400 to SC_Rx scan φ.

[0197] The determination unit 306 determines, for example, the radio wave that is transmitted by the antenna device 100 when the rotation angle of the reflection unit 104 is the emission target rotation angle and that is received by the antenna device 200 when the rotation angle of the reflection unit 202 is the second measurement angle. For example, the determination unit 306 determines, based on a plurality of measurement data measured by the antenna device 200 receiving, at the second measurement angle of the reflection unit 202, the radio waves transmitted at each of the plurality of first measurement angles of the reflection unit 104 by the antenna device 100 and stored in the storage unit 304, the radio wave that is transmitted by the antenna device 100 when the rotation angle of the reflection unit 104 is the emission target rotation angle and that is received by the antenna device 200 when the rotation angle of the reflection unit 202 is the second measurement angle.

[0198] The determination unit 306 determines, for example, the radio wave that is transmitted by the antenna device 100 when the rotation angle of the reflection unit 104 is the emission target rotation angle and received by the antenna device 200 when the rotation angle of the reflection unit 202 is the second measurement angle, based on the radio wave when the radio waves emitted at each of the plurality of first measurement angles of the reflection unit 104 by the antenna device 100 and received at the second measurement angle of the reflection unit 202 by the antenna device 200 are combined. For example, the determination unit 306 executes synthetic aperture processing based on the plurality of measurement data, and regards the radio wave reflected by the reflection unit 104 and emitted to the outside from the radio wave radiated by the radio wave radiating unit 102 as the radio wave emitted by the virtual antenna 150, thereby determining the radio wave that is transmitted by the antenna device 100 when the rotation angle of the reflection unit 104 is the emission target rotation angle and received by the antenna device 200 when the rotation angle of the reflection unit 202 is the second measurement angle. For example, the determination unit 306 executes synthetic aperture processing based on the plurality of measurement data, and regards the radio wave reflected by the reflection unit 104 at the plurality of first measurement angles and emitted to the outside from the radio wave radiated by the radio wave radiating unit 102 as the radio wave emitted by the virtual array 170 composed of the plurality of virtual antennas 150, thereby determining the radio wave that is transmitted by the antenna device 100 when the rotation angle of the reflection unit 104 is the emission target rotation angle and received by the antenna device 200 when the rotation angle of the reflection unit 202 is the second measurement angle. For example, the determination unit 306 executes synthetic aperture processing using the above-described mathematical formula.

[0199] The determination unit 306 determines, for example, the radio waves transmitted by the antenna device 100 when the rotation angle of the reflection unit 104 is the emission target rotation angle and received by the antenna device 200 when the rotation angle of the reflection unit 202 is each of the plurality of second measurement angles. The determination unit 306 determines, for example, based on the plurality of measurement data stored in the storage unit 304, which is measured by the antenna device 200 receiving the radio waves transmitted by the antenna device 100 at each of the plurality of first measurement angles of the reflection unit 104 at the plurality of second measurement angles of the reflection unit 202, the radio waves transmitted by the antenna device 100 when the rotation angle of the reflection unit 104 is the emission target rotation angle and received by the antenna device 200 when the rotation angle of the reflection unit 202 is each of the plurality of second measurement angles.

[0200] The determination unit 306 determines, for example, the radio waves transmitted by the antenna device 100 when the rotation angle of the reflection unit 104 is each of the plurality of emission target rotation angles and received by the antenna device 200 at the second measurement angle of the reflection unit 202. The determination unit 306 determines, for example, the radio waves transmitted by the antenna device 100 when the rotation angle of the reflection unit 104 is each of the plurality of emission target rotation angles at a plurality of predetermined angular intervals and received by the antenna device 200 at the second measurement angle of the reflection unit 202. The determination unit 306, for example, by scanning φ SC_Tx determines the radio waves transmitted by the antenna device 100 when the rotation angle of the reflection unit 104 is each of the plurality of emission target rotation angles and received by the antenna device 200 at the second measurement angle of the reflection unit 202. The determination unit 306, for example, uses the angle controller 400 to scan φ SC_Tx to scan.

[0201] The determination unit 306 determines, for example, the radio wave that is transmitted by the antenna device 100 when the rotation angle of the reflection unit 104 is the emission target rotation angle and that is received by the antenna device 200 when the rotation angle of the reflection unit 202 is the reception target rotation angle. For example, the determination unit 306 determines, based on a plurality of measurement data measured by the antenna device 200 receiving, at each of a plurality of first measurement angles of the reflection unit 104, the radio wave transmitted by the antenna device 100 and stored in the storage unit 304, the radio wave that is transmitted by the antenna device 100 when the rotation angle of the reflection unit 104 is the emission target rotation angle and that is received by the antenna device 200 when the rotation angle of the reflection unit 202 is the second measurement angle.

[0202] The determination unit 306 determines, for example, the radio wave transmitted by the antenna device 100 when the rotation angle of the reflection unit 104 is the emission target rotation angle and received by the antenna device 200 when the rotation angle of the reflection unit 202 is the reception target rotation angle, based on the radio wave when the radio waves emitted at each of the plurality of first measurement angles by the antenna device 100 and received at the plurality of second measurement angles by the antenna device 200 are combined. For example, the determination unit 306 executes synthetic aperture processing based on the plurality of measurement data, regards the radio wave reflected by the reflection unit 104 from the radio wave radiated by the radio wave radiating unit 102 and emitted to the outside as the radio wave emitted by the virtual antenna 150, and regards the radio wave reflected by the reflection unit 202 and received by the radio wave receiving unit 204 as the radio wave received by the virtual antenna 250, thereby determining the radio wave transmitted by the antenna device 100 when the rotation angle of the reflection unit 104 is the emission target rotation angle and received by the antenna device 200 when the rotation angle of the reflection unit 202 is the reception target rotation angle. For example, the determination unit 306 executes synthetic aperture processing based on the plurality of measurement data, regards the radio wave reflected by the reflection unit 104 at the plurality of first measurement angles from the radio wave radiated by the radio wave radiating unit 102 and emitted to the outside as the radio wave emitted by the virtual array 170 composed of the plurality of virtual antennas 150, and regards the radio wave reflected by the reflection unit 202 at the plurality of second measurement angles and received by the radio wave receiving unit 204 as the radio wave received by the virtual array 270 composed of the plurality of virtual antennas 250, thereby determining the radio wave transmitted by the antenna device 100 when the rotation angle of the reflection unit 104 is the emission target rotation angle and received by the antenna device 200 when the rotation angle of the reflection unit 202 is the reception target rotation angle. For example, the determination unit 306 executes synthetic aperture processing using the foregoing mathematical formula.

[0203] The determination unit 306 determines, for example, radio waves that are transmitted by the antenna device 100 when the rotation angle of the reflection unit 104 is each of a plurality of emission target rotation angles and that are received by the antenna device 200 when the rotation angle of the reflection unit 202 is each of a plurality of reception target rotation angles. The determination unit 306 determines, for example, radio waves that are transmitted by the antenna device 100 when the rotation angle of the reflection unit 104 is each of a plurality of emission target rotation angles at a predetermined angular interval and that are received by the antenna device 200 when the rotation angle of the reflection unit 202 is each of a plurality of reception target rotation angles at a predetermined angular interval. The determination unit 306, for example, scans φ SC_Tx and φ SC_Rx to determine radio waves that are transmitted by the antenna device 100 when the rotation angle of the reflection unit 104 is each of a plurality of emission target rotation angles and that are received by the antenna device 200 when the rotation angle of the reflection unit 202 is each of a plurality of reception target rotation angles. The determination unit 306, for example, uses the angle controller 400 to scan φ SC_Tx and φ SC_Rx .

[0204] The selection unit 308 selects, from among the plurality of measurement data stored in the storage unit 304, the plurality of measurement data used by the determination unit 306 to determine the radio waves received by the antenna device 200. The determination unit 306 may determine the radio waves received by the antenna device 200 based on the plurality of measurement data selected by the selection unit 308.

[0205] The selection unit 308 selects, for example, a plurality of measurement data used by the determination unit 306 to determine the radio wave received by the antenna device 200 from among the plurality of measurement data measured by the fact that the radio wave emitted by the antenna device 100 is received by the antenna device 200 that rotates the reflecting unit 202 one or more times with respect to the radio wave receiving unit 204. The selection unit 308, for example, selects measurement data centered on the measurement data measured by the fact that the radio wave emitted by the antenna device 100 is received by the antenna device 200 when the second measurement angle of the reflecting unit 202 is φ Rx to select a plurality of measurement data used by the determination unit 306 to determine the radio wave received by the antenna device 200.

[0206] The selection unit 308 selects, for example, a plurality of measurement data used by the determination unit 306 to determine the radio wave received by the antenna device 200 from among the plurality of measurement data measured by the fact that the radio wave emitted by the antenna device 100 that rotates the mounting unit 107 one or more times around the radio wave radiating unit 102 is received by the antenna device 200. The selection unit 308, for example, selects measurement data centered on the measurement data measured by the fact that the radio wave emitted by the antenna device 100 when the first measurement angle of the reflecting unit 104 is φ Tx is received by the antenna device 200 to select a plurality of measurement data used by the determination unit 306 to determine the radio wave received by the antenna device 200.

[0207] The selection unit 308 selects, for example, a plurality of measurement data used by the determination unit 306 to determine the radio wave received by the antenna device 200 from among the plurality of measurement data measured by the fact that the radio wave emitted by the antenna device 100 that rotates the mounting unit 107 one or more times around the radio wave radiating unit 102 is received by the antenna device 200 that rotates the reflecting unit 202 one or more times with respect to the radio wave receiving unit 204. The selection unit 308, for example, selects measurement data centered on the measurement data measured by the fact that the radio wave emitted by the antenna device 100 when the first measurement angle of the reflecting unit 104 is φ TxWhen the radio wave emitted by the antenna device 100 is such that the second measurement angle of the reflection unit 202 is φ Rx The determination unit 306 selects a plurality of measurement data used for determining the radio wave received by the antenna device 200 by selecting the measurement data centered around the measurement data measured by receiving the radio wave emitted by the antenna device 100 when the second measurement angle of the reflection unit 202 is φ.

[0208] The determination unit 306 determines, for example, the combination of the rotation angle of the reflection unit 104 and the rotation angle of the reflection unit 202 when the radio wave emitted by the antenna device 100 arrives at the antenna device 200 with the maximum electric field strength, based on the electric field strength of the radio wave emitted at each of the plurality of first measurement angles of the reflection unit 104 by the antenna device 100 and received at the plurality of second measurement angles of the reflection unit 202 by the antenna device 200, and the electric field strength of the radio wave received by the antenna device 200 when the rotation angle of the reflection unit 202 is each of the plurality of reception target rotation angles. The determination unit 306 determines, for example, the combination of the rotation angle of the reflection unit 104 and the rotation angle of the reflection unit 202 when the radio wave emitted by the antenna device 100 arrives at the antenna device 200 with the maximum electric field strength, further based on the electric field strength of the radio wave emitted at each of the plurality of first measurement angles of the reflection unit 104 by the antenna device 100 and received at the plurality of second measurement angles of the reflection unit 202 by the antenna device 200. The determination unit 306 determines the combination of the rotation angle of the reflection unit 104 and the rotation angle of the reflection unit 202 when the radio wave emitted by the antenna device 100 arrives at the antenna device 200 with the maximum electric field strength, further based on the electric field strength of the radio wave emitted at each of the plurality of emission target rotation angles of the reflection unit 104 by the antenna device 100 and received at each of the plurality of reception target rotation angles of the reflection unit 202 by the antenna device 200.

[0209] The determination unit 306 determines, for example, a combination of the rotation angle of the reflection unit 104 and the rotation angle of the reflection unit 202 when the vertically polarized wave component of the radio wave emitted by the antenna device 100 arrives at the antenna device 200 with the maximum electric field strength. The determination unit 306 determines, for example, a combination of the rotation angle of the reflection unit 104 and the rotation angle of the reflection unit 202 when the horizontally polarized wave component of the radio wave emitted by the antenna device 100 arrives at the antenna device 200 with the maximum electric field strength.

[0210] FIG. 17 schematically shows an example of the hardware configuration of a computer 1200 that functions as the information processing device 300. A program installed in the computer 1200 causes the computer 1200 to function as one or more "units" of the device according to the present embodiment, or causes the computer 1200 to execute an operation associated with the device according to the present embodiment or the one or more "units", and / or causes the computer 1200 to execute the process according to the present embodiment or a stage of the process. Such a program may be executed by the CPU 1212 to cause the computer 1200 to execute certain operations associated with some or all of the blocks of the flowcharts and block diagrams described herein.

[0211] The computer 1200 according to this embodiment includes a CPU 1212, a RAM 1214, and a graphic controller 1216, which are interconnected by a host controller 1210. The computer 1200 also includes input / output units such as a communication interface 1222, a storage device 1224, a DVD drive 1226, and an IC card drive, which are connected to the host controller 1210 via an input / output controller 1220. The DVD drive 1226 may be a DVD-ROM drive, a DVD-RAM drive, or the like. The storage device 1224 may be a hard disk drive, a solid state drive, or the like. The computer 1200 also includes legacy input / output units such as a ROM 1230 and a keyboard, which are connected to the input / output controller 1220 via an input / output chip 1240.

[0212] The CPU 1212 operates according to programs stored in the ROM 1230 and the RAM 1214, thereby controlling each unit. The graphic controller 1216 acquires image data generated by the CPU 1212 in a frame buffer or the like provided in the RAM 1214 or within itself, and causes the image data to be displayed on the display device 1218.

[0213] The communication interface 1222 communicates with other electronic devices via a network. The storage device 1224 stores programs and data used by the CPU 1212 within the computer 1200. The DVD drive 1226 reads a program or data from a DVD-ROM 1227 or the like and provides it to the storage device 1224. The IC card drive reads programs and data from an IC card and / or writes programs and data to an IC card.

[0214] ROM 1230 stores therein a boot program or the like executed by the computer 1200 at activation, and / or a program dependent on the hardware of the computer 1200. The input / output chip 1240 may also be connected to the input / output controller 1220 via various input / output units such as a USB port, a parallel port, a serial port, a keyboard port, a mouse port, etc.

[0215] The program is provided by a computer-readable storage medium such as a DVD-ROM 1227 or an IC card. The program is read from the computer-readable storage medium, installed in the storage device 1224, the RAM 1214, or the ROM 1230 which is also an example of a computer-readable storage medium, and executed by the CPU 1212. The information processing described in these programs is read by the computer 1200, resulting in the cooperation between the program and the various types of hardware resources described above. The device or method may be configured by realizing the operation or processing of information according to the use of the computer 1200.

[0216] For example, when communication is executed between the computer 1200 and an external device, the CPU 1212 may execute a communication program loaded in the RAM 1214 and instruct the communication interface 1222 to perform communication processing based on the processing described in the communication program. The communication interface 1222 reads the transmission data stored in the transmission buffer area provided in a recording medium such as the RAM 1214, the storage device 1224, the DVD-ROM 1227, or the IC card under the control of the CPU 1212, transmits the read transmission data to the network, or writes the received data received from the network to the reception buffer area provided on the recording medium, etc.

[0217] Further, the CPU 1212 may cause all or necessary parts of files or databases stored in an external recording medium such as the storage device 1224, the DVD drive 1226 (DVD-ROM 1227), an IC card, etc. to be read into the RAM 1214, and may execute various types of processing on the data on the RAM 1214. Next, the CPU 1212 may write back the processed data to the external recording medium.

[0218] Various types of information such as various types of programs, data, tables, and databases may be stored in the recording medium and may undergo information processing. The CPU 1212 may perform various types of processing on the data read from the RAM 1214, including various types of operations, information processing, conditional judgment, conditional branching, unconditional branching, information search / replacement, etc. described throughout this disclosure and specified by the instruction sequence of the program, and write back the results to the RAM 1214. Also, the CPU 1212 may search for information in files, databases, etc. within the recording medium. For example, when a plurality of entries each having an attribute value of a first attribute associated with an attribute value of a second attribute are stored in the recording medium, the CPU 1212 searches for an entry that matches the condition where the attribute value of the first attribute is specified among the plurality of entries, reads the attribute value of the second attribute stored in the entry, and thereby may obtain the attribute value of the second attribute associated with the first attribute that satisfies a predetermined condition.

[0219] The programs or software modules described above may be stored in a computer-readable storage medium on or near the computer 1200. Also, a recording medium such as a hard disk or RAM provided in a server system connected to a dedicated communication network or the Internet can be used as a computer-readable storage medium, thereby providing the program to the computer 1200 via the network.

[0220] In the flowchart and block diagram in this embodiment, the blocks may represent stages of a process in which an operation is executed or "parts" of a device having a role of executing an operation. Specific stages and "parts" may be implemented by a dedicated circuit, a programmable circuit supplied with computer-readable instructions stored on a computer-readable storage medium, and / or a processor supplied with computer-readable instructions stored on a computer-readable storage medium. The dedicated circuit may include digital and / or analog hardware circuits, and may include an integrated circuit (IC) and / or discrete circuits. The programmable circuit may include, for example, a reconfigurable hardware circuit including a logical product, a logical sum, an exclusive logical sum, a negative logical product, a negative logical sum, and other logical operations, a flip-flop, a register, and a memory element, such as a field programmable gate array (FPGA) and a programmable logic array (PLA).

[0221] The computer-readable medium may include any tangible device capable of storing instructions executable by an appropriate device, and as a result, the computer-readable medium having instructions stored therein will comprise a product including instructions executable to create means for performing the operations specified in the flowchart or block diagram. Examples of the computer-readable medium may include an electronic storage medium, a magnetic storage medium, an optical storage medium, an electromagnetic storage medium, a semiconductor storage medium, and the like. More specific examples of the computer-readable medium may include a floppy (registered trademark) disk, a diskette, a hard disk, a random access memory (RAM), a read only memory (ROM), an erasable programmable read only memory (EPROM or flash memory), an electrically erasable programmable read only memory (EEPROM), a static random access memory (SRAM), a compact disc read only memory (CD-ROM), a digital versatile disc (DVD), a Blu-ray (registered trademark) disc, a memory stick, an integrated circuit card, and the like.

[0222] Computer-readable instructions may include any combination of one or more programming languages, including assembly instructions, instruction set architecture (ISA) instructions, machine instructions, machine-dependent instructions, microcode, firmware instructions, state-setting data, or object-oriented programming languages such as Smalltalk®, JAVA®, C++, and conventional procedural programming languages such as the "C" programming language or similar programming languages, either in source code or object code.

[0223] Computer-readable instructions may be executed to create means for a processor or programmable circuit of a programmable data processing apparatus such as a computer to perform the operations specified in a flowchart or block diagram, provided locally or via a wide area network (WAN) such as a local area network (LAN), the Internet, etc. Here, the computer may be a personal computer (PC), tablet computer, smartphone, workstation, server computer, general-purpose computer, or special-purpose computer, etc., or may be a computer system with a plurality of computers connected. Such a computer system with a plurality of computers connected is also called a distributed computing system and is a computer in a broad sense. In a distributed computing system, each of the plurality of computers executes a part of the program and, if necessary, passes data during program execution between the computers, so that the plurality of computers collectively execute the program.

[0224] Examples of processors include computer processors, central processing units (CPUs), processing units, microprocessors, digital signal processors, controllers, microcontrollers, and the like. A computer may include one processor or multiple processors. In a multiprocessor system including multiple processors, each processor executes a part of a program, and the multiple processors execute the program collectively by passing data during program execution between the processors as needed. For example, in the execution of multitasking, each of the multiple processors may execute a portion of each task in pieces by switching tasks every time slice. In this case, which part of a program each processor executes changes dynamically. Which part of a program each of the multiple processors executes may be statically determined by programming that takes into account the multiprocessor.

[0225] As described above, the present invention has been described using embodiments, but the technical scope of the present invention is not limited to the scope described in the above embodiments. It is obvious to those skilled in the art that various changes or improvements can be made to the above embodiments. It is clear from the description of the claims that forms with such changes or improvements may also be included in the technical scope of the present invention.

[0226] It should be noted that the execution order of each process such as operations, procedures, steps, and stages in the devices, systems, programs, and methods shown in the claims, the specification, and the drawings is not explicitly indicated as "earlier" or "preceding" etc., and can be realized in any order unless the output of the previous process is used in the subsequent process. Regarding the operation flows in the claims, the specification, and the drawings, even if "first," "next," etc. are used for convenience of explanation, it does not mean that it is essential to implement in this order.

Description of Reference Numerals

[0227] 10 System, 100 Antenna device, 102 Radio wave radiation unit, 103 Aperture plane, 104 Reflective unit, 106 Support unit, 107 Mounting unit, 108 Angle change unit, 150 Virtual antenna, 152 Aperture plane, 170 Virtual array, 200 Antenna device, 202 Reflective unit, 204 Radio wave reception unit, 205 Aperture plane, 206 Support unit, 208 Angle change unit, 250 Virtual antenna, 252 Aperture plane, 270 Virtual array, 300 Information processing device, 302 Acquisition unit, 304 Storage unit, 306 Decision unit, 308 Selection unit, 400 Angle controller, 500 VNA, 1200 Computer, 1210 Host controller, 1212 CPU, 1214 RAM, 1216 Graphics controller, 1218 Display device, 1220 Input / output controller, 1222 Communication interface, 1224 Storage device, 1226 DVD drive, 1227 DVD-ROM, 1230 ROM, 1240 Input / output chip

Claims

1. a first antenna device including: a radio wave emitting portion that emits radio waves in a terahertz wave band or a high SHF (super high frequency) band; a first reflecting portion that reflects the radio waves radiated by the radio wave radiating portion and emits the radio waves to the outside and has a plate-like shape; a mounting portion that mounts the radio wave radiating portion and the first reflecting portion; and a first angle changing portion that changes a rotation angle of the first reflecting portion when the first reflecting portion reflects the radio waves radiated by the radio wave radiating portion by rotating and moving the mounting portion around the radio wave radiating portion; a second antenna device including a radio wave receiving unit, a second reflecting unit that reflects radio waves from outside and has a plate-like shape, and a second angle changing unit that changes a rotation angle of the second reflecting unit when the second reflecting unit reflects radio waves from outside by rotating and moving the second reflecting unit relative to the radio wave receiving unit; an information processing device having: an acquisition unit that acquires a plurality of measurement data measured by the second antenna device being reflected by the first reflecting unit at a first measurement angle and receiving the radio waves emitted by the first antenna device by reflecting them by the second reflecting unit at a plurality of second measurement angles; and a determination unit that determines, based on the plurality of measurement data, radio waves that are emitted by the first antenna device when the rotation angle of the first reflecting unit is the first measurement angle and are received by the second antenna device when the rotation angle of the second reflecting unit is a receiving target rotation angle that is not included in the plurality of second measurement angles; A system comprising:

2. the acquisition unit acquires the plurality of pieces of measurement data measured by the second antenna device receiving radio waves emitted by the first antenna device by being reflected by the first reflecting portions at the plurality of first measurement angles among the plurality of first measurement angles and reflected by the second reflecting portions at the plurality of second measurement angles; the determination unit determines, based on the plurality of measurement data, radio waves that are emitted by the first antenna device when the rotation angle of the first reflector is at each of the plurality of first measurement angles and that are received by the second antenna device when the rotation angle of the second reflector is at the receiving target rotation angle. The system of claim 1 .

3. the acquisition unit acquires the plurality of pieces of measurement data measured by the second antenna device receiving radio waves emitted by the first antenna device by being reflected by the first reflecting portions at the plurality of first measurement angles among the plurality of first measurement angles and reflected by the second reflecting portions at the plurality of second measurement angles; the determination unit determines, based on the plurality of measurement data, a radio wave that is emitted by the first antenna device when the rotation angle of the first reflector is an emission target rotation angle that is not included in the plurality of first measurement angles and that is received by the second antenna device when the rotation angle of the second reflector is the reception target rotation angle.

3. A system according to claim 1 or 2.

4. 4. The system according to claim 3, wherein the determination unit determines radio waves emitted by the first antenna device when the rotation angle of the first reflector is the emission target rotation angle and received by the second antenna device when the rotation angle of the second reflector is the reception target rotation angle, based on radio waves obtained by combining radio waves emitted by the first antenna device when the rotation angle of the first reflector is the emission target rotation angle and received by the second antenna device when the rotation angle of the second reflector is the reception target rotation angle.

5. 5. The system according to claim 4, wherein the determination unit performs synthetic aperture processing on each of the openings of the radio wave emitting unit and the openings of the radio wave receiving unit based on the multiple measurement data, thereby regarding the radio waves radiated by the radio wave emitting unit and reflected by the first reflecting unit and emitted to the outside as radio waves emitted by a first virtual antenna located at a position symmetrical to the position of the radio wave emitting unit with respect to the first reflecting unit, and regarding the radio waves reflected by the second reflecting unit and received by the radio wave receiving unit as radio waves received by a second virtual antenna located at a position symmetrical to the position of the radio wave receiving unit with respect to the second reflecting unit.

6. the determination unit performs the synthetic aperture process on each of the openings of the radio wave emitting unit and the openings of the radio wave receiving unit by using the following formula: [0010] Where: [0025] is the electric field intensity of the vertical polarization component of the radio wave emitted by the first virtual antenna when the rotation angle of the first reflector is the emission target rotation angle and received by the second virtual antenna when the rotation angle of the second reflector is the reception target rotation angle, and φ Ｔｘ +φ ＳＣ＿Ｔｘ is the rotation angle of the output target, and φ Ｒｘ +φ ＳＣ＿Ｒｘ is the receiving target rotation angle, and φ Ｔｘ is a central first measured angle of the plurality of first measured angles, and φ Ｒｘ is a central second measured angle of the plurality of second measured angles, and φ ＳＣ＿Ｔｘ is the first offset angle, φ ＳＣ＿Ｒｘ is the second offset angle, E Ｖ (φ Ｒｘ +θ ｎ＿Ｒｘ， φ Ｔｘ +θ ｎ＿Ｔｘ ) is a first measurement angle of the first reflecting portion φ Ｔｘ +θ ｎ＿Ｔｘ The second measurement angle of the second reflector emitted by the first virtual antenna when Ｒｘ +θ ｎ＿Ｒｘ is the electric field intensity of the vertical polarization component of the radio wave received by the second virtual antenna when θ ｎ＿Ｔｘ is n_Tx x AS Ｔｘ and A.S. Ｔｘ is a first angular interval of the plurality of first measured angles, and θ ｎ＿Ｒｘ is n_Rx x AS Ｒｘ and A.S. Ｒｘ is a second angular interval of the plurality of second measured angles, and w ｎ＿Ｔｘ is the first Gaussian window, and w ｎ＿Ｒｘ is the second Gaussian window, and k ＳＣ＿Ｔｘ is a wave vector of the radio wave emitted by the first virtual antenna when the rotation angle of the first reflector is the emission target rotation angle, and k ＳＣ＿Ｒｘ is the wave vector of the radio wave received by the second virtual antenna when the rotation angle of the second reflector is the receiving target rotation angle, and R ｎ＿Ｔｘ The first measurement angle of the first reflecting portion is φ Ｔｘ +θ ｎ＿Ｔｘ is the position vector of the first virtual antenna when Ｔｘ is the distance from the first reflector to the first virtual antenna, and R ｎ＿Ｒｘ The second measurement angle of the second reflecting portion is φ+θ ｎ＿Ｒｘ is the position vector of the second virtual antenna when Ｒｘ is the distance from the second reflector to the second virtual antenna, and σ Ｔｘ is the standard deviation that defines the width of the first Gaussian window, and σ Ｒｘ is the standard deviation that defines the width of the second Gaussian window, The system of claim 5.

7. the second angle changing unit rotates and moves the second reflecting unit relative to the radio wave receiving unit so that the second reflecting unit reflects the radio wave emitted by the first antenna device at the plurality of second measurement angles at predetermined second angle intervals; the determination unit determines radio waves emitted by the first antenna device when the rotation angle of the first reflector is the first measurement angle and received by the second antenna device when the rotation angle of the second reflector is each of the plurality of receiving target rotation angles at a predetermined third angle interval.

3. A system according to claim 1 or 2.

8. The system of claim 7 , wherein the third angular interval is a shorter angular interval than the second angular interval.

9. 3. The system according to claim 1 or 2, wherein the determination unit determines a combination of the rotation angle of the first reflector and the rotation angle of the second reflector when the radio waves emitted by the first antenna device arrive at the second antenna device with maximum field strength, based on an electric field strength of radio waves emitted by the first antenna device when the rotation angle of the first reflector is each of the first measurement angles of the multiple first measurement angles and received by the second antenna device when the rotation angle of the second reflector is each of the second measurement angles of the multiple second measurement angles, and an electric field strength of radio waves emitted by the first antenna device when the rotation angle of the first reflector is each of the first measurement angles of the multiple first measurement angles and received by the second antenna device when the rotation angle of the second reflector is each of the receiving target rotation angles of the multiple receiving target rotation angles.

10. a second antenna device having a radio wave receiving unit, a second reflecting unit that reflects radio waves from outside and has a plate-like shape, and a second angle changing unit that changes a rotation angle of the second reflecting unit when the second reflecting unit reflects radio waves from outside by rotating and moving the second reflecting unit relative to the radio wave receiving unit, the second antenna device having a radio wave emitting unit that radiates radio waves in a terahertz wave band or a high SHF band, a first reflecting unit that reflects the radio waves radiated by the radio wave emitting unit and outputs them to the outside and has a plate-like shape, a mounting unit that mounts the radio wave emitting unit and the first reflecting unit, and a first angle changing unit that changes a rotation angle of the first reflecting unit when the first reflecting unit reflects the radio waves radiated by the radio wave emitting unit by rotating and moving the mounting unit around the radio wave emitting unit, the second antenna device having a radio wave receiving unit that receives a plurality of measurement data measured by reflecting the radio waves reflected by the first reflecting unit at a first measurement angle and receiving them at the second reflecting unit at a plurality of second measurement angles; a determination unit that determines, based on the plurality of measurement data, radio waves that are emitted by the first antenna device when the rotation angle of the first reflector is the first measurement angle and that are received by the second antenna device when the rotation angle of the second reflector is a receiving target rotation angle that is not included in the plurality of second measurement angles; An information processing device comprising:

11. On the computer, an acquisition step of acquiring a plurality of measurement data measured by receiving radio waves reflected by the first reflector at a first measurement angle and reflected by the second reflector at a plurality of second measurement angles by a first antenna device, the second antenna device having a radio wave receiving unit, a second reflector that reflects radio waves from outside and has a plate-like shape, and a second angle change unit that changes a rotation angle of the second reflector when the second reflector reflects radio waves from outside by rotating and moving the second reflector relative to the radio wave receiving unit, the second antenna device having a radio wave emitting unit that radiates radio waves in a terahertz wave band or a high SHF band, a first reflector that reflects the radio waves radiated by the radio wave radiator and outputs them to the outside and has a plate-like shape, a mounting unit that mounts the radio wave radiator and the first reflector, and a first angle change unit that changes a rotation angle of the first reflector when the first reflector reflects the radio waves radiated by the radio wave radiator by rotating and moving the mounting unit around the radio wave radiator; a determination step of determining, based on the plurality of measurement data, radio waves emitted by the first antenna device when the rotation angle of the first reflector is the first measurement angle and received by the second antenna device when the rotation angle of the second reflector is a receiving target rotation angle that is not included in the plurality of second measurement angles; A program for executing the above.

12. a first antenna device having a radio wave emitting unit that emits radio waves in a terahertz wave band or a high SHF band, a first reflecting unit that reflects the radio waves radiated by the radio wave emitting unit and outputs them to the outside and that has a plate-like shape, a mounting unit that mounts the radio wave emitting unit and the first reflecting unit, and a first angle changing unit that changes a rotation angle of the first reflecting unit when the first reflecting unit reflects the radio waves radiated by the radio wave emitting unit by rotating and moving the mounting unit around the radio wave emitting unit; a second antenna device having a radio wave receiving unit, a second reflecting unit that reflects radio waves from the outside and that has a plate-like shape, and a second angle changing unit that changes a rotation angle of the second reflecting unit when the second reflecting unit reflects the radio waves from the outside by rotating and moving the second reflecting unit relative to the radio wave receiving unit; and an information processing device, a receiving step in which the second antenna device receives the radio wave emitted by the first antenna device by being reflected by the first reflecting portion at a first measurement angle and reflected by the second reflecting portion at a plurality of second measurement angles; an acquisition step in which the information processing device acquires a plurality of measurement data measured by receiving radio waves emitted by the first antenna device by the second antenna device being reflected by the first reflecting portion at the first measurement angle and reflected by the second reflecting portion at the plurality of second measurement angles in the reception step; a determination step in which the information processing device determines, based on the plurality of measurement data acquired in the acquisition step, radio waves that are emitted by the first antenna device when the rotation angle of the first reflector is the first measurement angle and that are received by the second antenna device when the rotation angle of the second reflector is a receiving target rotation angle that is not included in the plurality of second measurement angles; A method comprising:

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