System, information processing device, program, and method

Abstract

SOLUTION: There is provided a system comprising: a first antenna device having a plate-shaped first reflection part that reflectively emits a radio wave radiated by a radio wave radiation part and a first angle changing part that changes a first rotation angle of the first reflection part; a second antenna device having a plate-shaped second reflection part that reflects the radio wave and a second angle changing part that changes a second rotation angle of the second reflection part; and an information processing device for determining the radio wave emitted by the first antenna device when the rotation angle of the first reflection part is the first measurement angle and received by the second antenna device when the rotation angle of the second reflection part is a reception target rotation angle, based on a plurality of measurement data measured by reflecting and receiving, by the second antenna device, at the second reflection part at a plurality of second measurement angles, the radio wave emitted by the first antenna device by reflecting at the first reflection part at the first measurement angle.SELECTED DRAWING: Figure 1

Description

[Technical Field]

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

[0002] Patent Document 1 describes a technology for identifying the combination of the emission direction and reception direction of radio waves in the terahertz wave band. Patent Document 2 describes a technology for changing the polarization of radio waves by adjusting the reflector of an antenna device. Patent Document 3 describes an antenna device that uses a reflector to perform azimuth scanning using a rotary drive device, and that is configured to eliminate electrical moving contacts and ensure that the primary radiator does not block the radio wave path between the reflector and free space. Non-Patent Document 1 describes a technology for applying a synthetic aperture direction-of-arrival measurement method to a measurement method using a rotating reflector. [Prior art document] [Patent Documents] [Patent Document 1] Patent No. 7246537 [Patent Document 2] Patent No. 7301911 [Patent Document 3] JP 2007-251664 A [Non-patent literature] "Non-Patent Document 1" by Ryo Yamaguchi and Kazuma Toyomimoto, "Study on a synthetic aperture type direction of arrival measurement method using a rotating reflector - Concave circular arc virtual array synthetic beam generation method using a primary radiator mirror image -" Institute of Electronics, Information and Communication Engineers, December 2020, pp. 29-32 Summary of the Invention [Means for solving the problem]

[0003] According to one embodiment of the present invention, there is provided a system. The system may include a first antenna device having a radio wave emitting unit that emits radio waves in the terahertz wave band or a high SHF (Super High Frequency) band, a first reflecting unit that reflects the radio waves radiated by the radio wave emitting unit and emits 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 the mounting unit around the radio wave emitting unit. The system may also include a second antenna device having 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 a rotation angle of the second reflecting unit when the second reflecting unit reflects the radio waves from the outside by rotating the second reflecting unit relative to the radio wave receiving unit. The system may include an information processing device having an acquisition unit that acquires multiple measurement data measured by the second antenna device receiving radio waves emitted by the first antenna device after they are reflected by the first reflector at a first measurement angle and reflected by the second reflector at multiple second measurement angles, and a determination unit that determines, based on the multiple 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 multiple second measurement angles.

[0004] In the system, the acquisition unit may acquire the plurality of measurement data measured by the second antenna device receiving radio waves emitted by the first antenna device after being reflected by the first reflecting unit at each of the plurality of first measurement angles and reflected by the second reflecting unit at the plurality of second measurement angles, and the determination unit may determine, based on the plurality of measurement data, radio waves 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 the receiving target rotation angle.

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

[0006] In any of the above systems, the determination unit may 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, based on radio waves obtained by combining radio waves emitted by the first antenna device when the rotation angle of the first reflector is each of the plurality of first measurement angles and received by the second antenna device when the rotation angle of the second reflector is each of the plurality of second measurement angles.

[0007] In any of the systems, the determination unit may perform synthetic aperture processing on each of the openings of the radio wave emitting unit and the radio wave receiving unit based on the multiple measurement data, thereby regarding the radio waves radiated by the radio wave emitting unit, 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. In this way, the determination unit may determine the radio waves radiated by the first antenna device when the rotation angle of the first reflecting unit is the emitting target rotation angle and received by the second antenna device when the rotation angle of the second reflecting unit is the receiving target rotation angle.

[0008] In any of the systems described above, the determination unit may perform the synthetic aperture processing on each of the openings of the radio wave emitting unit and the radio wave receiving unit using the following formula:

[0009]

number

[0010]

number

[0011] In any of the above systems, the second angle change unit may rotate the second reflecting unit relative to the radio wave receiving unit so that the second reflecting unit reflects the radio waves emitted by the first antenna device at the plurality of second measurement angles at a predetermined second angle interval, and the determination unit may determine the 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 each of the plurality of receiving target rotation angles at a predetermined third angle interval.

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

[0013] In any of the above systems, the determination unit may determine 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 the electric field strength of radio waves emitted by the first antenna device when the rotation angle of the first reflector is at each first measurement angle of the multiple first measurement angles and received by the second antenna device when the rotation angle of the second reflector is at each second measurement angle of the multiple second measurement angles, and the electric field strength of radio waves emitted by the first antenna device when the rotation angle of the first reflector is at each first measurement angle of the multiple first measurement angles and received by the second antenna device when the rotation angle of the second reflector is at each receiving target rotation angle of the multiple receiving target rotation angles.

[0014] According to one embodiment of the present invention, there is provided an information processing device, the information processing device may include an acquisition unit configured to acquire 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 including a radio wave receiving unit, a second reflector that is plate-shaped and that reflects radio waves from outside, and a second angle changer that changes a rotation angle of the second reflector when the second reflector reflects radio waves from outside by rotating the second reflector relative to the radio wave receiving unit, the second antenna device including a radio wave emitting unit that emits radio waves in the terahertz wave band or the high SHF wave band, a first reflector that is plate-shaped and that reflects the radio waves radiated by the radio wave radiator and radiates them to the outside, a mounting unit that mounts the radio wave radiator and the first reflector, and a first angle changer 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 the mounting unit around the radio wave radiator. The information processing device may include a determination unit that determines, 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.

[0015] According to one embodiment of the present invention, a second antenna device is provided in a computer, the second antenna device having a radio wave receiving unit, a second reflecting unit that is plate-shaped and that reflects radio waves from outside, 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 outside by rotating and moving the second reflecting unit relative to the radio wave receiving unit, the second antenna device comprising: a radio wave emitting unit that emits radio waves in the terahertz wave band or high SHF band; a first reflecting unit that is plate-shaped and that reflects the radio waves radiated by the radio wave radiating unit and emits them to the outside; a mounting unit that mounts the radio wave radiating unit and the first reflecting unit; and a second angle changing unit that changes the rotation angle of the second reflecting unit when the second reflecting unit reflects radio waves radiated by the radio wave radiating unit by rotating and moving the mounting unit around the radio wave radiating unit. a first angle change unit that changes the rotation angle of the first reflector when reflecting the radio waves emitted by a first antenna device; an acquisition procedure that acquires a plurality of measurement data measured by receiving radio waves that are reflected by the second reflector at a plurality of second measurement angles, the measurement data being acquired by a first antenna device having a rotation angle of the first reflector at a first measurement angle; and a determination procedure 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 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.

[0016] According to one embodiment of the present invention, there is provided a first antenna device having a radio wave emitting unit that emits radio waves in the terahertz wave band or the high SHF band, a first reflecting unit that reflects the radio waves radiated by the radio wave emitting unit and emits 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 the 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 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 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; and a method executed by a system including an information processing device. The method may include a receiving step in which the second antenna device receives radio waves emitted by the first antenna device after being reflected by the first reflector at a first measurement angle and reflected by the second reflector at a plurality of second measurement angles.The method may include an acquiring 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 after being reflected by the first reflector at the first measurement angle and reflected by the second reflector at the plurality of second measurement angles, based on the plurality of measurement data acquired in the acquiring step.The method may include a determining step in which the information processing device 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 a reception target rotation angle that is not included in the plurality of second measurement angles, based on the plurality of measurement data acquired in the acquiring step.

[0017] The above summary of the invention does not list all of the necessary features of the present invention, and subcombinations of these features may also constitute inventions. [Brief explanation of the drawings]

[0018] [Figure 1]An example of a system 10 is shown schematically. [Figure 2] 1 illustrates an example of an antenna device 100. [Figure 3] 1 is an explanatory diagram for explaining an example of the relationship between a radio wave emitting section 102 and a virtual antenna 150. FIG. [Figure 4] FIG. 2 is an explanatory diagram for explaining an example of a virtual array 170. [Figure 5] FIG. 2 is an explanatory diagram for explaining an example of the position of a virtual antenna 150. [Figure 6] FIG. 10 is an explanatory diagram for explaining an example of an emission target rotation angle. [Figure 7] 2 shows a schematic diagram of an example of an antenna device 200. [Figure 8] 10 is an explanatory diagram for explaining an example of the relationship between a radio wave receiving unit 204 and a virtual antenna 250. FIG. [Figure 9] FIG. 10 is an explanatory diagram for explaining an example of a virtual array 270. [Figure 10] FIG. 2 is an explanatory diagram for explaining an example of the position of a virtual antenna 250. [Figure 11] FIG. 10 is an explanatory diagram for explaining an example of a receiving target rotation angle. [Figure 12] FIG. 2 is an explanatory diagram for explaining an example of a processing flow of the system 10. [Figure 13] FIG. 10 is an explanatory diagram for explaining another example of the processing flow of the system 10. [Figure 14] FIG. 10 is an explanatory diagram for explaining another example of the processing flow of the system 10. [Figure 15] An example of a simulation result of radio waves received by the antenna device 200 is shown. [Figure 16] 2 shows an example of a functional configuration of an information processing device 300. [Figure 17] An example of the hardware configuration of a computer 1200 that functions as the information processing device 300 is shown in schematic form. DETAILED DESCRIPTION OF THE INVENTION

[0019] The applicant has developed a so-called "rotating reflector antenna," which has a fixed primary radiator and a rotating parabolic reflector. A rotating reflector antenna has a mechanism that allows the reflector to rotate infinitely at high speed, enabling high-speed directional scanning. However, to precisely detect the beam's direction of arrival, the measuring angle interval of the rotating reflector antenna must be narrowed, resulting in a decrease in measurement speed. Furthermore, narrowing the beamwidth requires a large-aperture parabolic antenna, which may not be possible due to the processing limitations of machining equipment. In the system according to this embodiment, for example, a mechanism is employed in which primary radiators are fixed on the transmitting and receiving sides, antennas with rotatable planar reflectors are prepared, rotation measurements are performed on both the transmitting and receiving sides, and then synthetic aperture processing is performed offline using the measurement data.

[0020] The present invention will be described below through embodiments of the invention, but the following embodiments do not limit the scope of the invention according to the claims. Furthermore, not all of the combinations of features described in the embodiments are necessarily essential to the solution of the invention.

[0021] 1 schematically illustrates an example of a 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 includes, for example, a radio wave emitting portion 102, a reflecting portion 104, a supporting portion 106, a mounting portion 107, and an angle changing portion 108. The antenna device 100 may be an example of a first antenna device.

[0023] The radio wave emitting unit 102 emits radio waves. For example, the radio wave emitting unit 102 emits a beam, thereby emitting the radio waves. For example, the radio wave emitting unit 102 is an antenna capable of emitting orthogonally polarized radio waves.

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

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

[0026] The reflecting section 104 reflects and emits to the outside the radio waves emitted by the radio wave emitting section 102. The reflecting section 104 may be an example of a first reflecting section.

[0027] The reflecting portion 104 has, for example, a plate-like shape. The reflecting portion 104 has, for example, a flat reflective surface that reflects radio waves. The reflecting portion 104 is, for example, a flat reflecting plate.

[0028] The reflecting section 104 may be any member that can reflect radio waves. The reflecting section 104 is, for example, a mirror. The reflecting section 104 is, for example, a flat reflecting mirror.

[0029] The support portion 106 supports the reflecting portion 104. The reflecting portion 104 and the support portion 106 may be integral with each other or may be different members.

[0030] The mounting portion 107 mounts the radio wave emitting portion 102 and the reflecting portion 104. The mounting portion 107 and the support portion 106 may be integrated or may be different members.

[0031] The angle change unit 108 rotates and moves the mounting unit 107. The rotational movement of the mounting unit 107 causes the reflection unit 104 mounted on the mounting unit 107 to rotate and move. The rotational movement of the mounting unit 107 also causes the radio wave emission unit 102 mounted on the mounting unit 107 to rotate. The angle change unit 108 is, for example, a turntable. The angle change unit 108 may be an example of a first angle change unit.

[0032] The angle change unit 108, for example, rotates the mounting unit 107 around the radio wave emitting unit 102 to change the rotation angle of the reflecting unit 104 when the reflecting unit 104 reflects the radio waves radiated by the radio wave emitting unit 102. The rotation angle of the reflecting unit 104 when the reflecting unit 104 reflects the radio waves radiated by the radio wave emitting unit 102 may be referred to as a first rotation angle. The angle change unit 108, for example, rotates the mounting unit 107 around the radio wave emitting unit 102 so that the reflecting unit 104 reflects the radio waves radiated by the radio wave emitting unit 102 at a plurality of first rotation angles (which may be referred to as first measurement angles) at predetermined angular intervals.

[0033] The angular interval between the multiple first measurement angles may be referred to as the first angular interval. The angular interval between the multiple first measurement angles may also be referred to as AS (Angular Space). Tx It may be written as AS. Tx is, for example, 2°.

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

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

[0036] The angle changer 108 rotates, for example, counterclockwise around the rotation axis, or may rotate clockwise around the rotation axis.

[0037] The radio wave emitting unit 102 is mounted on the mounting unit 107, for example, so that the central axis of the radio wave emitting unit 102, which is 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, for example, so that the support unit 106 is perpendicular to the mounting surface of the mounting unit 107. The support unit 106 supports the reflecting unit 104, for example, so that 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 includes, for example, a reflecting portion 202, a radio wave receiving portion 204, a supporting portion 206, and an angle changing portion 208. The antenna device 200 may be an example of a second antenna device.

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

[0040] The reflecting portion 202 has, for example, a plate shape. The reflecting portion 202 has, for example, a flat reflective surface that reflects radio waves. The reflecting portion 202 is, for example, a flat reflecting plate.

[0041] The reflecting portion 202 may be any member that can reflect radio waves. The reflecting portion 202 is, for example, a mirror. The reflecting portion 202 is, for example, a flat reflecting mirror.

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

[0043] The support portion 206 supports the reflecting portion 202. The reflecting portion 202 and the support portion 206 may be integral with each other or may be different members.

[0044] The angle changer 208 rotates the reflector 202. The angle changer 208 is, for example, a turntable. The angle changer 208 may be an example of a second angle changer.

[0045] The angle changing unit 208 changes the rotation angle of the reflecting unit 202 when the reflecting unit 202 reflects radio waves from outside, for example, by rotating the reflecting unit 202 relative to the radio wave receiving unit 204. The rotation angle of the reflecting unit 202 when the reflecting unit 202 reflects radio waves from outside may be referred to as a second rotation angle. For example, the angle changing unit 208 rotates the reflecting unit 202 relative 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 referred to as second measurement angles) at predetermined angular intervals.

[0046] The angle interval between the plurality of second measurement angles may be referred to as the second angle interval. Rx It may be written as AS. Rx is, for example, 2°.

[0047] For example, the angle changing unit 208 rotates the reflecting unit 202 one or more times relative to the radio wave receiving unit 204. For example, if the angle changing unit 208 rotates the reflecting unit 202 one time relative 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 less than one time relative to the radio wave receiving unit 204.

[0048] The angle changer 208 rotates, for example, around a rotation axis, which may be perpendicular to the installation surface of the angle changer 208 on which the support 206 is installed.

[0049] The angle changer 208 rotates, for example, counterclockwise around the rotation axis, or may rotate clockwise around the rotation axis.

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

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

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

[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 vector network analyzer (VNA) 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 reflecting unit 202. The angle changing unit 208 may rotate the reflecting unit 202 relative to the radio wave receiving unit 204 in accordance with the control of the angle controller 400.

[0055] The angle controller 400 transmits, for example, angle data indicating the rotation angle of the reflecting unit 202 to the information processing device 300. The angle controller 400 transmits the angle data to the information processing device 300 via, for example, a wired connection. The angle controller 400 may also 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 reflecting unit 104. The angle changing unit 108 may rotate the mounting unit 107 around the radio wave emitting unit 102 under the control of the angle controller 400.

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

[0058] The information processing device 300 may have the function 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 have the angle controller 400 built in.

[0059] The VNA 500 measures the field strength of radio waves received by the antenna device 200. For example, the VNA 500 measures the field strength of radio waves when the antenna device 200 receives, at a second measurement angle of one of the reflectors 202, radio waves emitted by the antenna device 100 when the rotation angle of the reflector 104 is a first measurement angle. For example, the VNA 500 measures the field strength of radio waves when the antenna device 200 receives, at a plurality of second measurement angles of the reflector 202, radio waves emitted by the antenna device 100 when the rotation angle of the reflector 104 is a first measurement angle. For example, the VNA 500 measures the field strength of radio waves when the antenna device 200 receives, at a plurality of second measurement angles of the reflector 202, radio waves emitted by the antenna device 100 when the rotation angle of the reflector 104 is each of a plurality of first measurement angles.

[0060] The VNA 500 has, for example, two terminals for measuring the field strength of radio waves. In the example shown in FIG. 1, the VNA 500 measures the field strength of radio waves at two terminals, terminal 1 and terminal 2.

[0061] For example, in response to receiving a trigger input from the angle controller 400, the VNA 500 starts measuring the field strength of radio waves when the antenna device 200 receives the radio waves. In this case, the VNA 500 may start measuring the field strength of radio waves when the antenna device 200 receives the radio waves by causing the antenna device 100 to emit radio waves.

[0062] The VNA 500 receives a trigger input from the angle controller 400 via, for example, a wired connection. The VNA 500 may also receive a trigger input from the angle controller 400 via a wireless connection.

[0063] The VNA 500 transmits, for example, measurement data obtained by measuring the field intensity of radio waves received by the antenna device 200 to the information processing device 300. The VNA 500 transmits the measurement data to the information processing device 300 via, for example, a wired connection. The VNA 500 may also transmit the measurement data to the information processing device 300 via a wireless connection.

[0064] The VNA 500 may be replaced with any device capable of measuring the field strength of the radio waves received by the antenna device 200. The VNA 500 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 VNA 500. The information processing device 300 and the VNA 500 may be integrated. For example, the information processing device 300 may have the VNA 500 built in.

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

[0067] The information processing device 300 acquires measurement data from, for example, the VNA 500. The information processing device 300 acquires angle data that corresponds to the measurement data and indicates a second measured angle of the reflecting unit 202 from, for example, the angle controller 400. The information processing device 300 acquires angle data that corresponds to the measurement data and indicates a first measured angle of the reflecting unit 104 from, for example, the angle controller 400.

[0068] The information processing device 300 performs, for example, a basis transformation on the measurement data. The information processing device 300 performs, for example, a basis transformation on the measurement data based on angle data that corresponds to the measurement data and indicates the second measured angle of the reflecting unit 202.

[0069] The information processing device 300 may consider radio waves emitted by the radio wave emitting unit 102 and reflected by the reflecting unit 104 to be emitted to the outside as radio waves emitted by a virtual antenna 150 located at a position symmetrical to the position of the radio wave emitting unit 102 with respect to the reflecting unit 104. For example, when the angle changing unit 108 rotates the mounting unit 107 one or more times around the radio wave emitting unit 102 so that the reflecting unit 104 reflects the radio waves radiated by the radio wave emitting unit 102 at a plurality of first measurement angles, the information processing device 300 may consider radio waves emitted by the radio wave emitting unit 102 and reflected by the reflecting unit 104 to be emitted to the outside as radio waves emitted by each of the virtual antennas 150 located at each of a plurality of black circles shown around the reflecting unit 104 in FIG.

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

[0071] The information processing device 300 may consider the radio waves reflected by the reflecting unit 202 and received by the radio wave receiving unit 204 to be radio waves received by a virtual antenna 250 located at a position symmetrical to the position of the radio wave receiving unit 204 with respect to the reflecting unit 202. For example, when the angle changing unit 208 rotates the reflecting unit 202 one or more times relative to the radio wave receiving unit 204 so that the reflecting unit 202 reflects the radio waves emitted by the antenna device 100 at a plurality of second measurement angles, the information processing device 300 may consider the radio waves reflected by the reflecting unit 202 and received by the radio wave receiving unit 204 to be radio waves received by the virtual antennas 250 located at each of the plurality of black circles shown around the reflecting unit 202 in FIG.

[0072] The information processing device 300 may regard the radio waves reflected by the reflecting unit 202 and received by the radio wave receiving unit 204 as radio waves received by a virtual array 270 composed of multiple virtual antennas 250. For example, when the angle changing unit 208 rotates the reflecting unit 202 one or more times relative to the radio wave receiving unit 204 so that the reflecting unit 202 reflects the radio waves emitted by the antenna device 100 at multiple second measurement angles, the information processing device 300 may select the multiple virtual antennas 250 that compose the virtual array 270.

[0073] For example, based on a plurality of measurement data measured by the antenna device 200 receiving radio waves emitted by the antenna device 100 at a first measurement angle at a plurality of second measurement angles, the information processing device 300 determines radio waves emitted by the antenna device 100 when the rotation angle of the reflector 104 is the first measurement angle and received by the antenna device 200 when the rotation angle of the reflector 202 is a receiving target rotation angle that is not included in the plurality of second measurement angles. For example, by performing synthetic aperture processing on the aperture of the radio wave receiving unit 204 based on the plurality of measurement data, the information processing device 300 determines radio waves emitted by the antenna device 100 when the rotation angle of the reflector 104 is the first measurement angle and received by the antenna device 200 when the rotation angle of the reflector 202 is a receiving target rotation angle. The specific process by which the information processing device 300 determines the radio waves emitted by the antenna device 100 when the rotation angle of the reflector 104 is the first measurement angle and received by the antenna device 200 when the rotation angle of the reflector 202 is the receiving target rotation angle will be described later.

[0074] For example, based on a plurality of measurement data measured by the antenna device 200 receiving, at the second measurement angle, radio waves emitted by the antenna device 100 at each of a plurality of first measurement angles by the antenna device 100. The information processing device 300 determines radio waves emitted by the antenna device 100 when the rotation angle of the reflector 104 is an emission target rotation angle that is not included in the plurality of first measurement angles and received by the antenna device 200 when the rotation angle of the reflector 202 is the second measurement angle. For example, by performing synthetic aperture processing on the opening of the radio wave emitting unit 102 based on the plurality of measurement data, the information processing device 300 determines radio waves emitted by the antenna device 100 when the rotation angle of the reflector 104 is the emission target rotation angle and received by the antenna device 200 when the rotation angle of the reflector 202 is the second measurement angle. The specific process by which the information processing device 300 determines the radio waves emitted by the antenna device 100 when the rotation angle of the reflector 104 is the emission target rotation angle and received by the antenna device 200 when the rotation angle of the reflector 202 is the second measurement angle will be described later.

[0075] For example, based on a plurality of measurement data measured by the antenna device 200 receiving, at a plurality of second measurement angles, radio waves emitted by the antenna device 100 at each of a plurality of first measurement angles by the antenna device 100. The information processing device 300 determines the radio waves emitted by the antenna device 100 when the rotation angle of the reflector 104 is the emission target rotation angle and received by the antenna device 200 when the rotation angle of the reflector 202 is the reception target rotation angle. For example, based on the plurality of measurement data, the information processing device 300 performs synthetic aperture processing on each of the openings of the radio wave emitting unit 102 and the radio wave receiving unit 204, thereby determining the radio waves emitted by the antenna device 100 when the rotation angle of the reflector 104 is the emission target rotation angle and received by the antenna device 200 when the rotation angle of the reflector 202 is the reception target rotation angle. The specific process by which the information processing device 300 determines the radio waves emitted by the antenna device 100 when the rotation angle of the reflector 104 is the emission target rotation angle and received by the antenna device 200 when the rotation angle of the reflector 202 is the reception target rotation angle will be described later.

[0076] 2 is a schematic diagram of an example of the antenna device 100. Here, the relationship between the rotation angle of the reflector 104 and the rotation angle of the virtual antenna 150 will be mainly described.

[0077] 2, the angle changer 108 rotates around a rotation axis parallel to the z-axis. Here, the rotation direction in which the angle changer 108 rotates counterclockwise around the rotation axis is defined as a positive rotation direction, and the rotation direction in which the angle changer 108 rotates clockwise around the rotation axis is defined as a negative rotation direction.

[0078] The angle changing unit 108 rotates the mounting unit 107 around the radio wave emitting unit 102, thereby rotating the reflecting unit 104 relative to the radio wave emitting unit 102, thereby rotating the virtual antenna 150. In the example shown in FIG. 2, the angle changing unit 108 rotates the reflecting unit 104 relative to the radio wave emitting unit 102 by θ TxWhen the virtual antenna 150 is rotated by θ Tx Therefore, θ Tx may represent the rotation angle of the reflector 104 or may represent the rotation angle of the virtual antenna 150.

[0079] In the example shown in Fig. 2, the installation surface of the angle changer 108 is a plane parallel to the xy plane. Also, in the example shown in Fig. 2, the mounting surface of the mounting unit 107 is a plane parallel to the xy plane. Also, in the 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] 3 is an explanatory diagram for explaining an example of the relationship between the radio wave emitting unit 102 and the virtual antenna 150. Here, the positional relationship between the radio wave emitting unit 102 and the virtual antenna 150 will be mainly explained.

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

[0082] Furthermore, since virtual antenna 150 is located at a position symmetrical to the position of radio wave emitting unit 102 with respect to reflector 104, the angle formed by reflector 104 and a line perpendicular to aperture surface 152 of the opening of virtual antenna 150 is the same as the angle formed by reflector 104 and a line perpendicular to aperture surface 103 of the opening of radio wave emitting unit 102. In the example shown in Fig. 3, the line perpendicular to reflector 104 and aperture surface 103 is a line parallel to the z-axis, and the line perpendicular to reflector 104 and aperture surface 152 is a line parallel to the x-axis. In the example shown in Fig. 3, the angle formed by reflector 104 and the line perpendicular to aperture surface 103 and the angle formed by reflector 104 and the line perpendicular to aperture surface 152 are both 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 at which the reflecting unit 104 reflects the radio waves emitted by the radio wave emitting unit 102.

[0084] 4, virtual array 170 is configured with 2N_Tx+1 virtual antennas 150 located at 2N_Tx+1 black circles, where N_Tx is an integer equal to or greater than 0.

[0085] φ Tx is the rotation angle of the center of the rotation angles of the 2N_Tx+1 virtual antennas 150. Therefore, N_Tx virtual antennas 150 out of the 2N_Tx+1 virtual antennas 150 are rotated by θ Tx =φ Tx θ from the virtual antenna 150 located at the black circle corresponding to Tx is large, and N_Tx virtual antennas 150 out of 2N_Tx+1 virtual antennas 150 have a θ Tx =φ Tx θ from the virtual antenna 150 located at the black circle corresponding to Tx is small.

[0086] In the example shown in FIG. 4, θ Tx =φ Tx A virtual antenna 150 located at the black circle corresponding to +θ1, θ Tx =φ Tx +θ2, , θ Tx =φ Tx +θ N_Tx-2 The virtual antenna 150, 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_Tx The N_Tx virtual antennas 150 located at the black circles corresponding to the Tx =φTx θ from the virtual antenna 150 located at the black circle corresponding to Tx In addition, among the 2N_Tx+1 virtual antennas 150 that configure the virtual array 170, θ Tx =φ Tx +θ -1 The virtual antenna 150, θ Tx =φ Tx +θ -2 , θ Tx =φ Tx +θ -(N_Tx-2) The virtual antenna 150, 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_Tx The N_Tx virtual antennas 150 located at the black circles corresponding to the Tx =φ Tx θ from the virtual antenna 150 located at the black circle corresponding to Tx is small.

[0087] Fig. 5 is an explanatory diagram for explaining an example of the position of the virtual antenna 150. Here, it is assumed that the origin of the xyz coordinate system shown in Fig. 5 is the reflection point at which the reflecting unit 104 reflects the radio waves radiated by the radio wave radiating unit 102.

[0088] The position of the virtual antenna 150 may be represented by a position vector. In the example shown in FIG. Tx =φ Tx +θ n_Tx The position vector R represents the position of the virtual antenna 150 located at the black circle corresponding to 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 +θn_Tx ),-R Tx sin(φ Tx +θ n_Tx )) θ n_Tx is n_Tx×AS Tx and n_Tx is an integer that satisfies −N_Tx≦n_Tx≦N_Tx.

[0089] Fig. 6 is an explanatory diagram for explaining an example of the rotation angle of the output target. Here, it is assumed that the origin of the xyz coordinate system shown in Fig. 6 is the reflection point at which the reflecting unit 104 reflects the radio wave emitted by the radio wave emitting unit 102.

[0090] In the example shown in FIG. Tx +φ SC_Tx is the rotation angle of the output target. SC_Tx is the offset angle, 0°<φ SC_Tx ≦(AS Tx -φ step_Tx ) is satisfied. step_Tx is the step angle, 0.1°≦φ step_Tx ≦1°. For example, AS Tx = 2°, and φ step_Tx = 0.1°, then φ SC_Tx is 0°<φ SC_Tx ≦1.9°.

[0091] The radio wave emitted from the radio wave emitting unit 102 is expressed as θ Tx =φ Tx +φ SC_Tx The radio wave reflected by the reflecting portion 104 and emitted to the outside when θ Tx =φ Tx +φ SC_Tx The purpose may be to determine the radio wave emitted by the virtual antenna 150 located in the black square corresponding to k. sc_Tx is θ Tx =φ Tx +φ SC_Tx In the example shown in FIG. 6, k sc_Tx is k sc_Tx =(kcos(180°+(φ Tx +φSC_Tx )),ksin(180°+(φ Tx +φ SC_Tx )))=(-kcos(φ Tx +φ SC_Tx ),-ksin(φ Tx +φ SC_Tx )) where k is k sc_Tx is the wave number.

[0092] 7 shows a schematic diagram of an example of an antenna device 200. Here, the relationship between the rotation angle of the reflector 202 and the rotation angle of the virtual antenna 250 will be mainly described.

[0093] 7, angle changer 208 rotates around a rotation axis parallel to the z' axis. Here, the rotation direction in which angle changer 208 rotates counterclockwise around the rotation axis is defined as a positive rotation direction, and the rotation direction in which angle changer 208 rotates clockwise around the rotation axis is defined as a negative rotation direction.

[0094] The angle changing unit 208 rotates the reflecting unit 202 relative to the radio wave receiving unit 204, thereby rotating the virtual antenna 250. In the example shown in FIG. 7, the angle changing unit 208 rotates the reflecting unit 202 relative to the radio wave receiving unit 204 by an angle θ Rx When the virtual antenna 250 is rotated by θ Rx Therefore, θ Rx may represent the rotation angle of the reflector 202 or may represent the rotation angle of the virtual antenna 250.

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

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

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

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

[0099] Fig. 9 is an explanatory diagram for explaining an example of 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 at which reflecting unit 202 reflects the radio waves received by radio wave receiving unit 204.

[0100] 9, virtual array 270 is configured with 2N_Rx+1 virtual antennas 250 located at 2N_Rx+1 black circles, where N_Rx is an integer equal to or greater than 0.

[0101] φ Rx is the rotation angle of the center of the rotation angles of the 2N_Rx+1 virtual antennas 250. Therefore, N_Rx virtual antennas 250 out of the 2N_Rx+1 virtual antennas 250 are Rx =φ Rx θ from the virtual antenna 250 located at the black circle corresponding to Rxis large, and N_Rx virtual antennas 250 out of 2N_Rx+1 virtual antennas 250 have a θ Rx =φ Rx θ from the virtual antenna 250 located at the black circle corresponding to Rx is small.

[0102] In the example shown in FIG. 9, among 2N_Rx+1 virtual antennas 250 constituting the virtual array 270, Rx =φ Rx Virtual antenna 250, located at the black circle corresponding to +θ1, Rx =φ Rx +θ2, , θ Rx =φ Rx +θ N_Rx-2 The virtual antenna 250, θ Rx =φ Rx +θ N_Rx-1 , and the virtual antenna 250 located at the black circle corresponding to θ Rx =φ Rx +θ N_Rx The N_Rx virtual antennas 250 located at the black circles corresponding to the Rx =φ Rx θ from the virtual antenna 250 located at the black circle corresponding to Rx In addition, among the 2N_Rx+1 virtual antennas 250 that configure the virtual array 270, θ Rx =φ Rx +θ -1 The virtual antenna 250, θ Rx =φ Rx +θ -2 Virtual antennas 250, , θ are located at black circles corresponding to Rx =φ Rx +θ -(N_Rx-2) The virtual antenna 250, θ Rx =φ Rx +θ -(N_Rx-1) , and the virtual antenna 250 located at the black circle corresponding to θ Rx =φ Rx +θ -N_Rx The N_Rx virtual antennas 250 located at the black circles corresponding to theRx =φ Rx θ from the virtual antenna 250 located at the black circle corresponding to Rx is small.

[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 at which the reflecting unit 202 reflects the radio waves received by the radio wave receiving unit 204.

[0104] The position of the virtual antenna 250 may be represented by a position vector. In the example shown in FIG. Rx =φ Rx +θ n_Rx The position vector R represents 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 +θn_Rx). θ n_Rx is n_Rx×AS Rx and n_Rx is an integer that satisfies −N_Rx≦n_Rx≦N_Rx.

[0105] Fig. 11 is an explanatory diagram for explaining an example of the receiving target rotation angle. Here, the origin of the x'y'z' coordinate system shown in Fig. 11 is assumed to be the reflection point at which the reflecting unit 202 reflects the radio waves received by the radio wave receiving unit 204.

[0106] In the example shown in FIG. Rx +φ SC_Rx is the receiving target rotation angle. SC_Rx is the offset angle, 0°<φ SC_Rx ≦(AS Rx -φstep_Rx ) is satisfied. step_Rx is the step angle, 0.1°≦φ step_Rx ≦1°. For example, AS Rx = 2°, and φ step_Rx = 0.1°, then φ SC_Rx is 0°<φ SC_Rx ≦1.9°.

[0107] θ Rx =φ Rx +φ SC_Rx The radio wave reflected by the reflecting unit 202 and received by the radio wave receiving unit 204 when θ Rx =φ Rx +φ SC_Rx The purpose may be to determine the radio waves received by the virtual antenna 250 located in the black square corresponding to k. sc_Rx is θ Rx =φ Rx +φ SC_Rx In the example shown in FIG. 11, k sc_Rx is k sc_Rx =(kcos(180°+(φ Rx +φ SC_Rx )),ksin(180°+(φ Rx +φ SC_Rx )))=(-kcos(φ Rx +φ SC_Rx ),-ksin(φ Rx +φ SC_Rx )) where k is k sc_Rx is the wave number.

[0108] 12 is an explanatory diagram illustrating an example of the processing flow of the system 10. Here, a state in which the information processing device 300 has not acquired any measurement data is taken as the starting state. Note that in the processing shown in FIG. 12, it is assumed that the first measurement angle of the reflecting unit 104 does not change.

[0109] In step (sometimes abbreviated as S) 102, the antenna device 100 emits radio waves by having the reflecting unit 104 reflect the radio waves emitted by the radio wave emitting unit 102. While the antenna device 100 is emitting the 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, when the angle changer 208 rotates the reflector 202 by one revolution relative to the radio wave receiver 204 while the antenna device 100 is emitting radio waves, the AS Rx = 2°, the antenna device 200 receives the radio waves emitted by the antenna device 100 at the second measurement angle of 180 reflectors 202. For example, the radio wave receiving unit 204 receives the radio waves at the second measurement angle of θ Rx θ = -180°, Rx θ = −178°, Rx , θ = −176°, Rx θ = 174°, Rx = 176°, and the radio wave reflected by the reflecting portion 202 when θ Rx = 178°, the reflecting portion 202 receives the reflected radio wave.

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

[0112] In S106, the information processing device 300 acquires a plurality of pieces of measurement data measured by the VNA 500 in S104 from the VNA 500. For example, the information processing device 300 Rx θ = −180°, and the measurement data of the electric field intensity of the radio wave reflected by the reflecting unit 202 and received by the radio wave receiving unit 204. Rx θ = −178°, and the measurement data of the electric field intensity of the radio wave reflected by the reflecting unit 202 and received by the radio wave receiving unit 204. Rx θ = −176°, ... Rx θ = 174°, and the measurement data of the electric field intensity of the radio wave reflected by the reflecting unit 202 and received by the radio wave receiving unit 204. Rx Measured data of the electric field intensity of the radio wave reflected by the reflecting unit 202 and received by the radio wave receiving unit 204 when θ = 176°, and Rx 180 pieces of measurement data are acquired, including measurement data that measures the field intensity of the radio wave reflected by reflector 202 and received by radio wave receiver 204 when angle θ is 178°.

[0113] In S108, the information processing device 300 performs a basis conversion process on each of the plurality of measurement data acquired in S106 from the VNA 500. For example, in order to perform the basis conversion process on the measurement data, the information processing device 300 converts φ , which is the center second measurement angle of the plurality of second measurement angles of the reflecting unit 202 corresponding to the plurality of measurement data, into a basis value. Rx Then, the information processing device 300 performs a basis transformation process on each piece of the plurality of pieces of measurement data using the following formula.

[0114]

number

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

[0116] In S110, the information processing device 300 selects, from the plurality of pieces of measurement data on which the basis conversion process has been performed in S108, a plurality of pieces of measurement data to be used for determining radio waves emitted by the antenna device 100 and received by the antenna device 200 when the rotation angle of the reflector 202 is the receiving target rotation angle. For example, from the 180 pieces of measurement data on which the basis conversion process has been performed in S108, the information processing device 300 selects, from the plurality of pieces of measurement data on which the basis conversion process has been performed in S108, a plurality of pieces of measurement data to be used for determining radio waves emitted by the antenna device 100 and received by the antenna device 200 when the second measurement angle of the reflector 202 is φ Rx The measurement data is selected mainly from the measurement data obtained by measuring the field strength of the radio wave received by the radio wave receiving unit 204 when

[0117] For example, the information processing device 300 detects a second measurement angle of the light emitted by the antenna device 100 and the reflector 202 at φ Rx +θ1, and 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 +θ2, and the measurement data obtained by measuring 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 and 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 radio wave emitted by the antenna device 100 and the reflecting unit 202 is φ Rx +θ N_Rx-1 and measurement data obtained by measuring 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 information processing device 300 selects N_Rx pieces of measurement data including measurement data that measures the field intensity of the radio wave received by the radio wave receiving unit 204 when the second measurement angle of the radio wave emitted by the antenna device 100 and reflected by the reflector 202 is φ Rx +θ -1 and 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 radio wave emitted by the antenna device 100 and the reflecting unit 202 is φ Rx +θ -2 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 radio wave emitted by the antenna device 100 and the reflecting unit 202 is φ Rx +θ -(N_Rx-2) and 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 radio wave emitted by the antenna device 100 and the reflecting unit 202 is φ Rx +θ -(N_Rx-1)and measurement data obtained by measuring 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 information processing device 300 selects N_Rx pieces of measurement data including measurement data that measures the field intensity of the radio waves received by the radio wave receiving unit 204 when

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

[0119] The information processing device 300 performs synthetic aperture processing based on the plurality of measurement data selected in S110, for example, by regarding radio waves reflected by the reflector 202 at a single second measurement angle and received by the radio wave receiving unit 204 as radio waves received by the virtual antenna 250, thereby determining radio waves emitted by the antenna device 100 and received by the antenna device 200 when the rotation angle of the reflector 202 is the reception target rotation angle. The information processing device 300 performs synthetic aperture processing based on the plurality of measurement data selected in S110, for example, by regarding radio waves reflected by the reflector 202 at a plurality of second measurement angles and received by the radio wave receiving unit 204 as radio waves received by the virtual array 270 configured with the plurality of virtual antennas 250, thereby determining radio waves emitted by the antenna device 100 and received by the antenna device 200 when the rotation angle of the reflector 202 is the reception target rotation angle. The information processing device 300 performs synthetic aperture processing using, for example, the following formula:

[0120]

number

[0121]

number

[0122] The information processing device 300 may determine the electric field intensity 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 reflector 202 is the receiving target rotation angle. In this case, the above-described formula for synthetic aperture processing is transformed into the following formula:

[0123]

number

[0124]

number

[0125] In the above synthetic aperture processing formula, k SC_Rx ·R n_Rx is k SC_Rx and R n_Rx k SC_Rx ·R n_Rx is k SC_Rx ·R n_Rx =kR Rx It may be expressed as cosα, where α is the SC_Rx and R n_Rx It is the angle between

[0126] As shown in the synthetic aperture processing formula above, k SC_Rx and R n_Rx is φ Rx Therefore, k SC_Rx and R n_Rx φ included in Rx Even if k is omitted SC_Rx and R n_Rx Since the angle α between the SC_Rx ·R n_Rx The value of does not change. From the above, the above formula for synthetic aperture processing may be modified as shown in the following formula.

[0127]

number

[0128] 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 202 is each of a plurality of reception target rotation angles at predetermined angular intervals. The angular intervals are φ step_Rx The angular interval may be equal to AS Rx There may be a shorter angular interval.

[0129] where φ Rx =0°, AS Rx = 2°, and φ step_Rx =0.1°, the information processing device 300 SC_Rx 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 202 is each of a plurality of reception target rotation angles by scanning the reflector 202 will be described below. 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 calculates φ SC_Rx =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 202 is 0.1°. SC_Rx φ step_Rx By scanning only φ, the radio waves emitted by the antenna device 100 and received by the antenna device 200 when the rotation angle of the reflector 202 is 0.2° are determined. SC_Rx By scanning the reflector 202, the radio waves emitted by the antenna device 100 and received by the antenna device 200 when the rotation angle of the reflector 202 is 1.9° are determined.

[0131] In S114, the information processing device 300 determines the rotation angle of the reflector 202 when the radio waves emitted by the antenna device 100 arrive at the antenna device 200 with the maximum field strength, based on the field strengths of the radio waves emitted by the antenna device 100 and received by the antenna device 200 at the plurality of second measurement angles of the reflector 202, which are included in the plurality of measurement data selected in S110, and the field strengths of the radio waves emitted by the antenna device 100 and received by the antenna device 200 when the rotation angle of the reflector 202 is each of the plurality of receiving target rotation angles, which were determined in S112. For example, Rx = 2° and φ step_Rx = 0.1°, the information processing device 300 determines the rotation angle of the reflecting section 202 when the radio waves emitted by the antenna device 100 arrive at the antenna device 200 with the maximum field strength, based on the electric field strength of the radio waves emitted by the antenna device 100 and received by the antenna device 200 at the 2N_Rx+1 measurement angles of the reflecting section 202, and the electric field strength of the radio waves emitted by the antenna device 100 and received by the antenna device 200 when the rotation angle of the reflecting section 202 is each of the 2N_Rx × 19 receiving target rotation angles.

[0132] The applicant has developed a so-called "rotating reflector antenna," in which a parabolic reflector is rotated relative to a primary radiator whose position and angle are fixed, thereby changing the rotation angle of the reflector and receiving radio waves reflected by the reflector with the primary radiator. One advantage of a rotating reflector antenna is that it can quickly determine the direction of arrival of radio waves by rotating the reflector. On the other hand, when using a rotating reflector antenna to receive short-wavelength radio waves such as those in the terahertz and high SHF bands, a large-aperture parabolic reflector is required to narrow the beamwidth of the radio waves received by the primary radiator. Large-aperture parabolic reflectors tend to be expensive to manufacture. Furthermore, due to the processing limitations of machining equipment, it may not be possible to manufacture large-aperture parabolic reflectors. In addition, to precisely determine the direction of arrival of radio waves using a rotating reflector antenna, the angle interval of the reflector's rotation when reflecting external radio waves must be finely adjusted to acquire a large number of measurement data. As a result, when determining the direction of arrival of radio waves with high precision using a rotating reflector antenna, it is not possible to determine the direction of arrival of radio waves in a short measurement time. For these reasons, it is desirable to realize an antenna that can receive short-wavelength radio waves with a narrow beam width at low manufacturing cost, and to be able to determine the direction of arrival of radio waves with high precision in a short measurement time.

[0133] In contrast, according to the system 10 of this embodiment, the antenna device 200 receives radio waves from the antenna device 100 by rotating the plate-shaped reflector 202 relative to the radio wave receiving unit 204 to change the rotation angle of the reflector 202. Because the reflector 202 is plate-shaped, a commercially available flat reflector or the like can be used as the reflector 202. Furthermore, by increasing the distance between the reflector 202 and the radio wave receiving unit 204, a large antenna aperture can be achieved without special processing. Therefore, compared to a rotating reflector antenna having a parabolic reflector, the antenna device 200 having the plate-shaped reflector 202 can achieve a large antenna aperture, which is necessary to receive short-wavelength radio waves with a narrow beam width, at a lower manufacturing cost. Furthermore, according to the system 10 of this embodiment, 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 202 is the receiving target rotation angle, based on multiple pieces of measurement data measured by the antenna device 200 receiving the radio waves emitted by the antenna device 100 at multiple second measurement angles of the reflector 202. By determining the radio waves received by the antenna device 200 when the rotation angle of the reflector 202 is the receiving target rotation angle based on the multiple pieces of measurement data, the information processing device 300 can accurately determine the arrival direction of the radio waves using a small number of pieces of measurement data. Therefore, the system 10 of this embodiment can accurately determine the arrival direction of the radio waves in a short measurement time. As described above, the system 10 of this embodiment can realize an antenna capable of receiving short-wavelength radio waves with a narrow beamwidth at low manufacturing cost and can accurately determine the arrival direction of the radio waves in a short measurement time.

[0134] 13 is an explanatory diagram for explaining another example of the processing flow of the system 10. Here, a state in which the information processing device 300 has not acquired any measurement data is taken as the starting state. Note that 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 having the reflector 104 reflect the radio waves emitted from the radio wave emitter 102 at a plurality of first measurement angles. While the antenna device 100 is emitting radio waves at the plurality of first measurement angles of the reflector 104, the antenna device 200 receives the radio waves emitted by the antenna device 100 at the plurality of first measurement angles of the reflector 104.

[0136] For example, while the antenna device 100 is emitting radio waves at the first measurement angles of the plurality of reflectors 104, the angle changer 108 rotates the mounting unit 107 around the radio wave radiator 102 by one rotation. Tx = 2°, the antenna device 100 emits light at the first measurement angle of 180 reflectors 104. For example, the antenna device 100 Tx θ = -180°, Tx θ = -178°, Tx , θ = -176°, Tx θ = 174°, Tx = 176°, and the radio wave reflected by the reflecting portion 202 when θ Tx = 178°, the reflecting portion 202 emits the reflected radio wave.

[0137] In S204, the VNA 500 measures the field intensity 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 reflectors 104 in S202. For example, the VNA 500 measures the field intensity of the radio waves received by the antenna device 200 at the first measurement angles of the plurality of reflectors 104. Tx θ = -180°, the electric field strength of the radio wave reflected by the reflecting unit 104 and received by the radio wave receiving unit 204, Tx θ = -178°, the electric field strength of the radio wave reflected by the reflecting unit 104 and received by the radio wave receiving unit 204, Tx θ = -176°, the electric field strength of the radio wave reflected by the reflecting unit 104 and received by the radio wave receiving unit 204, Tx θ = 174°, and the electric field strength of the radio wave reflected by the reflecting unit 104 and received by the radio wave receiving unit 204. Tx= 176°, and the electric field strength of the radio wave reflected by the reflecting unit 104 and received by the radio wave receiving unit 204 when θ Tx When the angle is θ=178°, the electric field strength of the radio wave reflected by the reflecting section 104 and received by the radio wave receiving section 204 is measured.

[0138] In S206, the information processing device 300 acquires a plurality of pieces of measurement data measured by the VNA 500 in S204 from the VNA 500. For example, the information processing device 300 Tx θ = −180°, and the measurement data is the electric field strength of the radio wave reflected by the reflecting unit 104 and received by the radio wave receiving unit 204. Tx θ = −178°, and the measurement data is the electric field strength of the radio wave reflected by the reflecting unit 104 and received by the radio wave receiving unit 204. Tx , θ = −176°, and the measurement data is the electric field intensity of the radio wave reflected by the reflecting unit 104 and received by the radio wave receiving unit 204. Tx θ = 174°, and the measurement data of the electric field intensity of the radio wave reflected by the reflecting unit 104 and received by the radio wave receiving unit 204. Tx Measured data of the electric field intensity of the radio wave reflected by the reflecting unit 104 and received by the radio wave receiving unit 204 when θ = 176°, and Tx 180 pieces of measurement data are acquired, including measurement data that measures the field intensity of the radio wave reflected by reflector 104 and received by radio wave receiver 204 when angle θ is 178°.

[0139] In S208, the information processing device 300 selects, from the plurality of pieces of measurement data acquired in S206, a plurality of pieces of measurement data to be used for determining 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 the emission target rotation angle. For example, in order to select the plurality of pieces of measurement data to be used for determining 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 the emission target rotation angle, the information processing device 300 selects φ, which is the center first measurement angle of the plurality of first measurement angles of the reflector 104 corresponding to the plurality of measurement data acquired in S206.Tx For example, the information processing device 300 determines the first measurement angle of the reflecting unit 104 as φ among the 180 pieces of measurement data. Tx The measurement data is selected mainly from the measurement data obtained by measuring the field intensity of the radio waves emitted by the antenna device 100 and received by the radio wave receiving unit 204 when

[0140] For example, the information processing device 300 may detect that the first measurement angle of the reflecting unit 104 is φ Tx +θ1, and the measurement data of the electric field intensity of the radio wave emitted by the antenna device 100 and received by the radio wave receiving unit 204 when the first measurement angle of the reflecting unit 104 is φ Tx +θ2, and the measurement data is obtained by measuring the electric field intensity of the radio wave emitted by the antenna device 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 and measurement data of the electric field intensity of the radio wave emitted by the antenna device 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 and measurement data obtained by measuring the electric field intensity of the radio wave emitted by the antenna device 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 The information processing device 300 selects N_Tx pieces of measurement data including measurement data obtained by measuring the field intensity of radio waves emitted by the antenna device 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 and measurement data of the electric field intensity of the radio wave emitted by the antenna device 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 Measurement data of the electric field intensity of the radio wave emitted by the antenna device 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)and measurement data of the electric field intensity of the radio wave emitted by the antenna device 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) and measurement data obtained by measuring the electric field intensity of the radio wave emitted by the antenna device 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 The information processing device 300 selects N_Tx pieces of measurement data including measurement data that measures the field intensity of the radio waves emitted by the antenna device 100 and received by the radio wave receiving unit 204 when

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

[0142] For example, the information processing device 300 performs synthetic aperture processing based on the plurality of measurement data selected in S208, and considers radio waves emitted by the radio wave emitting unit 102, reflected by the reflecting unit 104 at a single first measurement angle, and emitted to the outside, as radio waves emitted by the virtual antenna 150, thereby determining radio waves emitted 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. For example, the information processing device 300 performs synthetic aperture processing based on the plurality of measurement data selected in S208, and considers radio waves emitted by the radio wave emitting unit 102, reflected by the reflecting unit 104 at a plurality of first measurement angles, and emitted to the outside, as radio waves emitted by the virtual array 170 formed by the plurality of virtual antennas 150, thereby determining radio waves emitted 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. The information processing device 300 performs synthetic aperture processing using, for example, the following formula:

[0143]

number

[0144]

number

[0145] The information processing device 300 may determine the electric field intensity of the horizontally 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 reflector 104 is the emission target rotation angle. In this case, the above-described formula for synthetic aperture processing is transformed into the following formula:

[0146]

number

[0147]

number

[0148] As shown in the synthetic aperture processing formula above, k SC_Tx and R n_Tx is 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 and does not change, k SC_Tx ·R n_Tx The value of does not change. From the above, the above formula for 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 output target rotation angles at predetermined angular intervals. The angular intervals are φ step_Tx The angular interval may be equal to AS Tx There may be a shorter angular interval.

[0151] where φ Tx =0°, AS Tx = 2°, and φ step_Tx =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°. SC_Tx φ step_TxBy scanning only φ, 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 0.2° are determined. SC_Tx By scanning the reflector 104, 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 1.9° are determined.

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

[0154] In the example of the processing flow of the system 10 in Fig. 13, the antenna device 100 may be interchanged with the antenna device 200. That is, in the 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] 14 is an explanatory diagram for explaining another example of the flow of processing in the system 10. Here, a state in which the information processing device 300 has not acquired any measurement data is taken as the starting state.

[0156] In S302, the antenna device 100 emits radio waves by having the reflector 104 reflect the radio waves emitted by the radio wave emitter 102 at a plurality of first measurement angles. While the antenna device 100 emits radio waves at the plurality of first measurement angles of the reflector 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 multiple reflectors 104, the angle changer 108 rotates the mounting unit 107 by one rotation around the radio wave emitting unit 102, and the angle changer 208 rotates the reflector 202 by 180 rotations relative to the radio wave receiving unit 204. In this case, Tx =2° and AS Rx = 2°, the antenna device 200 receives the radio waves emitted by the antenna device 100 at one of the first measurement angles of the reflector 104 at the second measurement angle of the 180 reflectors 202. The angle changing unit 208 rotationally moves the reflector 202 relative to the radio wave receiving unit 204 so that the antenna device 200 receives the radio waves emitted by the antenna device 100 at one of the first measurement angles of the reflector 104 at the second measurement angle of the 180 reflectors 202. The angle changing unit 108 rotationally moves the mounting unit 107 around the radio wave emitting unit 102 in response to the antenna device 200 receiving the radio waves emitted by the antenna device 100 at one of the first measurement angles of the reflector 104 at the second measurement angle of the 180 reflectors 202.

[0158] For example, the radio wave receiving unit 204 Tx When θ = -180°, the radio wave reflected and emitted by the reflecting portion 104 is Rx θ = -180°, TxWhen θ = -180°, the radio wave reflected and emitted by the reflecting portion 104 is Rx θ = −178°, Tx When θ = -180°, the radio wave reflected and emitted by the reflecting portion 104 is Rx , θ = −176°, Tx When θ = -180°, the radio wave reflected and emitted by the reflecting portion 104 is Rx θ = 174°, Tx When θ = -180°, the radio wave reflected and emitted by the reflecting portion 104 is Rx = 176°, and the radio wave reflected by the reflecting portion 202 when θ Tx When θ = -180°, the radio wave reflected and emitted by the reflecting portion 104 is Rx = 178°, the reflecting portion 202 receives the reflected radio wave.

[0159] Next, the radio wave receiving unit 204 calculates θ Tx When the angle is θ = -178°, the radio wave reflected and emitted by the reflecting portion 104 is Rx θ = -180°, Tx When the angle is θ = -178°, the radio wave reflected and emitted by the reflecting portion 104 is Rx θ = −178°, Tx When the angle is θ = -178°, the radio wave reflected and emitted by the reflecting portion 104 is Rx , θ = −176°, Tx When the angle is θ = -178°, the radio wave reflected and emitted by the reflecting portion 104 is Rx θ = 174°, Tx When the angle is θ = -178°, the radio wave reflected and emitted by the reflecting portion 104 is Rx = 176°, and the radio wave reflected by the reflecting portion 202 when θ Tx When the angle is θ = -178°, the radio wave reflected and emitted by the reflecting portion 104 is Rx = 178°, the reflecting unit 202 receives the reflected radio wave.Tx When the angle is θ = -178°, the radio wave reflected and emitted by the reflecting portion 104 is Rx The same process is repeated until the reflector 202 receives the radio wave reflected when the angle is 178°.

[0160] In S304, the VNA 500 measures the field intensity 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 reflectors 104 in S302. For example, the VNA 500 measures the field intensity 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 reflectors 104. Tx When θ = -180°, the radio wave reflected and emitted by the reflecting portion 104 is Rx θ = -180°, the electric field strength of the radio wave reflected by the reflecting unit 202 and received by the radio wave receiving unit 204, Tx When θ = -180°, the radio wave reflected and emitted by the reflecting portion 104 is Rx θ = -178°, the electric field strength of the radio wave reflected by the reflecting unit 202 and received by the radio wave receiving unit 204, Tx When θ = -180°, the radio wave reflected and emitted by the reflecting portion 104 is Rx =-176°, the electric field strength of the radio wave reflected by the reflecting unit 202 and received by the radio wave receiving unit 204, . . . , θ Tx When the angle is θ = 178°, the radio wave reflected and emitted by the reflecting portion 104 is Rx θ = 174°, the electric field strength of the radio wave reflected by the reflecting unit 202 and received by the radio wave receiving unit 204, Tx When the angle is θ = 178°, the radio wave reflected and emitted by the reflecting portion 104 is Rx = 176°, and the electric field strength of the radio wave reflected by the reflecting unit 202 and received by the radio wave receiving unit 204 when θ Tx When the angle is θ = 178°, the radio wave reflected and emitted by the reflecting portion 104 is Rx When the angle is θ=178°, the electric field strength of the radio wave reflected by the reflecting section 202 and received by the radio wave receiving section 204 is measured.

[0161] In S306, the information processing device 300 acquires a plurality of pieces of measurement data measured by the VNA 500 in S304 from the VNA 500. For example, the information processing device 300 TxWhen θ = -180°, the radio wave reflected and emitted by the reflecting portion 104 is Rx θ = −180°, and the measurement data of the electric field intensity of the radio wave reflected by the reflecting unit 202 and received by the radio wave receiving unit 204. Tx When θ = -180°, the radio wave reflected and emitted by the reflecting portion 104 is Rx θ = −178°, and the measurement data of the electric field intensity of the radio wave reflected by the reflecting unit 202 and received by the radio wave receiving unit 204. Tx When θ = -180°, the radio wave reflected and emitted by the reflecting portion 104 is Rx θ = −176°, ... Tx When the angle is θ = 178°, the radio wave reflected and emitted by the reflecting portion 104 is Rx θ = 174°, and the measurement data of the electric field intensity of the radio wave reflected by the reflecting unit 202 and received by the radio wave receiving unit 204. Tx When the angle is θ = 178°, the radio wave reflected and emitted by the reflecting portion 104 is Rx Measured data of the electric field intensity of the radio wave reflected by the reflecting unit 202 and received by the radio wave receiving unit 204 when θ = 176°, and Tx When the angle is θ = 178°, the radio wave reflected and emitted by the reflecting portion 104 is Rx 180×180 pieces of measurement data are acquired, including measurement data that measures the field intensity of radio waves reflected by reflector 202 and received by radio wave receiver 204 when angle θ is 178°.

[0162] In S308, the information processing device 300 performs a basis transformation process on each of the plurality of measurement data acquired in S306 from the VNA 500. For example, the information processing device 300 performs a basis transformation process on each of the plurality of measurement data acquired in S306 from the VNA 500. For example, the information processing device 300 performs a basis transformation process on each of the plurality of measurement data acquired in S306 from the VNA 500. Rx is determined, and the basis transformation process is performed on each of the plurality of measurement data using the following formula:

[0163]

number

[0164] E V (φ Rx +θ n_Rx, φ Tx +θ n_Tx ) is the angle at which the first measurement angle of the reflecting portion 104 is φ Tx +θ n_Tx The second measurement angle of the reflector 202 emitted by the antenna device 100 when Rx +θ n_Rx is the electric field intensity of the vertically polarized component of the radio wave received by the radio wave receiving unit 204 when E H (φ Rx +θ n_Rx, φ Tx +θ n_Tx ) is the angle at which the first measurement angle of the reflecting portion 104 is φ Tx +θ n_Tx The second measurement angle of the reflector 202 emitted by the antenna device 100 when 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 E Rx1 (φ Rx +θ n_Rx, φ Tx +θ n_Tx ) is the angle at which the first measurement angle of the reflecting portion 104 is φ Tx +θ n_Tx The second measurement angle of the reflector 202 emitted by the antenna device 100 when Rx +θ n_Rx The electric field strength of the radio wave received by the radio wave receiving unit 204 when E is included in the measurement data measured by the VNA 500. Rx2 (φ Rx +θ n_Rx, φ Tx +θ n_Tx ) is the electric field strength of the radio wave measured at terminal 2 of VNA500, included in the measurement data.

[0165] In S310, the information processing device 300 selects, from the plurality of measurement data on which the basis conversion process has been performed in S308, a plurality of measurement data to be used for determining the radio waves emitted by the antenna device 100 when the rotation angle of the reflector 104 is the emission target rotation angle and received by the antenna device 200 when the rotation angle of the reflector 202 is the reception target rotation angle. For example, the information processing device 300 selects a first measurement angle φ at the center of the plurality of first measurement angles of the reflector 104 corresponding to the plurality of measurement data on which the basis conversion process has been performed in S308. Tx For example, the information processing device 300 determines the first measurement angle of the reflecting unit 104 as φ from among the 180×180 pieces of measurement data on which the basis conversion process has been performed in S308. Tx The second measurement angle of the reflector 202 emitted by the antenna device 100 when Rx The measurement data is selected mainly from the measurement data obtained by measuring the field strength of the radio wave received by the radio wave receiving unit 204 when

[0166] For example, the information processing device 300 may detect that the first measurement angle of the reflecting unit 104 is φ Tx The second measurement angle of the reflector 202 emitted by the antenna device 100 when Rx +θ1, and the measurement data is obtained by measuring 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 The second measurement angle of the reflector 202 emitted by the antenna device 100 when Rx +θ2, ..., measurement data obtained by measuring the 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 The second measurement angle of the reflector 202 emitted by the antenna device 100 when Rx +θ N_Rx-2 The measurement data is obtained by measuring 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 The second measurement angle of the reflector 202 emitted by the antenna device 100 when Rx +θ N_Rx-1and measurement data obtained by measuring 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 The second measurement angle of the reflector 202 emitted by the antenna device 100 when Rx +θ N_Rx The measurement data includes 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 Furthermore, the information processing device 300 selects N_Rx pieces of measurement data when the first measurement angle of the reflecting unit 104 is φ Tx The second measurement angle of the reflector 202 emitted by the antenna device 100 when Rx +θ -1 The measurement data is obtained by measuring 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 The second measurement angle of the reflector 202 emitted by the antenna device 100 when 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 the first measurement angle of the reflecting unit 104 is φ Tx The second measurement angle of the reflector 202 emitted by the antenna device 100 when Rx +θ -(N_Rx-2) The measurement data is obtained by measuring 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 The second measurement angle of the reflector 202 emitted by the antenna device 100 when Rx +θ -(N_Rx-1) and measurement data obtained by measuring 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 The second measurement angle of the reflector 202 emitted by the antenna device 100 when Rx +θ -N_Rx The measurement data includes 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 TxAs a result, the information processing device 300 selects N_Rx pieces of measurement data when the first measurement angle of the reflecting unit 104 is φ Tx Then, 2N_Rx+1 pieces of measurement data are selected when

[0167] Next, the information processing device 300 similarly determines whether the first measurement angle of the reflecting unit 104 is φ Tx +θ1, and the first measurement angle of the reflector 104 is φ Tx +θ2, 2N_Rx+1 pieces of measurement data when the first measurement angle of the reflecting unit 104 is φ Tx +θ N_Tx-2 2N_Rx+1 pieces of measurement data when the first measurement angle of the reflecting unit 104 is φ Tx +θ N_Tx-1 and the first measurement angle of the reflector 104 is φ Tx +θ N_Tx Similarly, the information processing device 300 selects 2N_Rx+1 pieces of measurement data when the first measurement angle of the reflecting unit 104 is φ Tx +θ -1 2N_Rx+1 pieces of measurement data when the first measurement angle of the reflecting unit 104 is φ Tx +θ -2 2N_Rx+1 pieces of measurement data when the first measurement angle of the reflecting unit 104 is φ Tx +θ -(N_Tx-2) 2N_Rx+1 pieces of measurement data when the first measurement angle of the reflecting unit 104 is φ Tx +θ -(N_Tx-1) and the first measurement angle of the reflector 104 is φ Tx +θ -N_Tx Thus, the unit 300 selects (2N_Tx+1)×(2N_Rx+1) pieces of measurement data.

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

[0169] The information processing device 300, for example, performs synthetic aperture processing based on the multiple measurement data selected in S310, and considers the radio waves emitted by the radio wave emitting unit 102, reflected by the reflecting unit 104 at a first measurement angle, and emitted to the outside as the radio waves emitted by the virtual antenna 150, and considers the radio waves reflected by the reflecting unit 202 at a second measurement angle and received by the radio wave receiving unit 204 as the radio waves received by the virtual antenna 250, thereby determining the radio waves emitted by the antenna device 100 when the rotation angle of the reflecting unit 104 is the emission target rotation angle and received by the antenna device 200 when the rotation angle of the reflecting unit 202 is the reception target rotation angle. The information processing device 300 performs synthetic aperture processing based on the plurality of measurement data selected in S310, for example, by regarding the radio waves emitted by the radio wave emitting unit 102, reflected by the reflecting unit 104 at a plurality of first measurement angles, and emitted to the outside as radio waves emitted by a virtual array 170 configured with a plurality of virtual antennas 150, and 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 radio waves received by a virtual array 270 configured with a plurality of virtual antennas 250. In this way, the information processing device 300 determines the radio waves emitted by the antenna device 100 when the rotation angle of the reflecting unit 104 is the emission target rotation angle and received by the antenna device 200 when the rotation angle of the reflecting unit 202 is the reception target rotation angle. The information processing device 300 performs synthetic aperture processing using, for example, the following formula.

[0170]

number

[0171]

number

[0172] The information processing device 300 may determine the electric field intensity of the horizontally polarized wave component of the radio wave emitted by the virtual antenna 150 when the rotation angle of the reflector 104 is the emission target rotation angle and received by the virtual antenna 250 when the rotation angle of the reflector 202 is the reception target rotation angle. In this case, the above-described formula for synthetic aperture processing is transformed into the following formula:

[0173]

number

[0174]

number

[0175] As shown in the synthetic aperture processing formula above, k SC_Tx and R n_Tx is φ Tx k SC_Rx and R n_Rx is φ Rx Therefore, k SC_Tx and R n_Tx φ included in Tx Even if k is omitted SC_Tx and R n_Tx Since the angle between k and k does not change SC_Tx ·R n_Tx The value of does not change, and k SC_Rx and R n_Rx φ included in Rx Even if k is omitted SC_Rx and R n_Rx Since the angle between k and k does not change SC_Rx ·R n_Rx The value of does not change. From the above, the above formula for synthetic aperture processing may be modified as shown in the following formula.

[0176]

number

[0177] The information processing device 300 determines, for example, radio waves emitted by the antenna device 100 when the rotation angle of the reflector 104 is each of a plurality of output target rotation angles at predetermined angular intervals, and received by the antenna device 200 when the rotation angle of the reflector 202 is each of a plurality of receiving 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°, the information processing device 300 SC_Tx and φ SC_Rx An example of a process for determining radio waves emitted by the antenna device 100 when the rotation angle of the reflector 104 is each of a plurality of emission target rotation angles at predetermined angular intervals and received by the antenna device 200 when the rotation angle of the reflector 202 is each of a plurality of reception target rotation angles 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°, 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 device 300 calculates φ SC_Tx =0.1° and φ SC_Rx =0.1°, the information processing device 300 determines the radio waves emitted by the antenna device 100 when the rotation angle of the reflector 104 is 0.1° and received by the antenna device 200 when the rotation angle of the reflector 202 is 0.1°. SC_Rx φ step_Rx By scanning only φ, the radio waves emitted by the antenna device 100 when the rotation angle of the reflector 104 is 0.1° and received by the antenna device 200 when the rotation angle of the reflector 202 is 0.2° are determined.SC_Rx By scanning, the radio waves emitted by the antenna device 100 when the rotation angle of the reflector 104 is 0.1° and received by the antenna device 200 when the rotation angle of the reflector 202 is 1.9° are determined.

[0179] Next, the information processing device 300 calculates φ SC_Tx φ step_Tx Scan only φ SC_Rx =0.1°, the information processing device 300 determines the radio waves emitted by the antenna device 100 when the rotation angle of the reflector 104 is 0.2° and received by the antenna device 200 when the rotation angle of the reflector 202 is 0.1°. SC_Rx By scanning, the information processing device 300 determines up to the radio waves emitted by the antenna device 100 when the rotation angle of the reflector 104 is 0.2° and received by the antenna device 200 when the rotation angle of the reflector 202 is 1.9°. SC_Tx and φ SC_Rx By scanning, the radio waves emitted by the antenna device 100 when the rotation angle of the reflector 104 is 1.9° and received by the antenna device 200 when the rotation angle of the reflector 202 is 1.9° are determined.

[0180] In S312, the information processing device 300 may determine, based on the plurality of measurement data selected in S310, radio waves emitted by the antenna device 100 at each of the plurality of first measurement angles of the reflector 104 and received by the antenna device 200 when the rotation angle of the reflector 202 is each of the plurality of receiving target rotation angles. Similar to S112 in the exemplary processing flow of the system 10 shown in FIG. 12 , the information processing device 300 may determine radio waves emitted by the antenna device 100 at each of the plurality of first measurement angles of the reflector 104 and received by the antenna device 200 when the rotation angle of the reflector 202 is each of the plurality of receiving target rotation angles.

[0181] In S312, the information processing device 300 may determine, based on the plurality of measurement data selected in S310, radio waves that are emitted by the antenna device 100 when the rotation angle of the reflector 104 is each of the plurality of output target rotation angles and that are received by the antenna device 200 at each of the plurality of second measurement angles of the reflector 202 when the rotation angle of the reflector 104 is each of the plurality of output target rotation angles. Similar to S210 in the exemplary processing flow of the system 10 shown in FIG. 13 , the information processing device 300 may determine radio waves that are emitted by the antenna device 100 when the rotation angle of the reflector 104 is each of the plurality of output target rotation angles and that are received by the antenna device 200 at each of the plurality of second measurement angles of the reflector 202.

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

[0183] In S314, the information processing device 300 may determine a combination of the rotation angle of the reflector 104 and the rotation angle of the reflector 202 when the radio waves emitted by the antenna device 100 arrive at the antenna device 200 with the maximum electric field strength, based further on the electric field strength of the radio waves emitted by the antenna device 100 at each of the multiple first measurement angles of the reflector 104 and received by the antenna device 200 when the rotation angle of the reflector 202 is each of the multiple receiving target rotation angles, as determined in S312. In S314, the information processing device 300 may determine a combination of the rotation angle of the reflecting unit 104 and the rotation angle of the reflecting unit 202 when the radio waves emitted by the antenna device 100 arrive at the antenna device 200 with the maximum electric field strength, based further on the electric field strength of the radio waves emitted by the antenna device 100 when the rotation angle of the reflecting unit 104 is each of the multiple emission target rotation angles determined in S312 and received by the antenna device 200 at each of the multiple second measurement angles of the reflecting unit 202.

[0184] 14, the information processing device 300 determines the radio waves emitted by the antenna device 100 when the rotation angle of the reflector 104 is the emission target rotation angle and received by the antenna device 200 when the rotation angle of the reflector 202 is the reception target rotation angle, based on a plurality of measurement data measured by the antenna device 200 receiving, at a plurality of second measurement angles, the radio waves emitted by the antenna device 100 at each of a plurality of first measurement angles of the reflector 104. This allows the system 10 shown in Fig. 14 to more precisely determine the arrival direction of the radio waves using a small number of measurement data.

[0185] Fig. 15 shows an example of a simulation result of radio waves received by antenna device 200. In the example shown in Fig. 15, the combination of the rotation angle of reflecting unit 104 and the rotation angle of reflecting unit 202 when radio waves emitted by antenna device 100 arrive at antenna device 200 with maximum field strength is assumed to be the rotation angle of reflecting unit 104 = -90° and the rotation angle of reflecting unit 202 = 90°.

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

[0187] The upper diagram of Fig. 15 shows an example of a simulation result of radio waves received by the antenna device 200 when synthetic aperture processing is not performed. The lower diagram of Fig. 15 shows an example of a simulation result of radio waves received by the antenna device 200 when synthetic aperture processing is performed. As shown by the two simulation results, the system 10 according to this embodiment can determine the direction of arrival of radio waves with high precision using a small amount of measurement data by performing synthetic aperture processing.

[0188] 16 schematically illustrates an example of the functional configuration of the information processing device 300. The information processing device 300 includes an acquisition unit 302, a storage unit 304, a determination unit 306, and a selection unit 308. Note that it is not essential that the information processing device 300 includes all of these components.

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

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

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

[0192] The determination unit 306, for example, performs a basis transformation process on each of the plurality of measurement data to determine the radio wave received by the antenna device 200. For example, the determination unit 306 determines φ, which is the center measurement angle of the plurality of second measurement angles of the reflector 202 corresponding to the plurality of measurement data. RxThen, the determining unit 306 performs a basis transformation process on each piece of the plurality of measurement data using the above-mentioned formula.

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

[0194] For example, the determination unit 306 determines the radio wave emitted by the antenna device 100 when the rotation angle of the reflector 104 is the first measurement angle and received by the antenna device 200 when the rotation angle of the reflector 202 is the receiving target rotation angle, based on radio waves obtained by combining radio waves emitted by the antenna device 100 at the first measurement angle of the reflector 104 and received by the antenna device 200 at multiple second measurement angles of the reflector 202. The determination unit 306 determines the radio wave emitted by the antenna device 100 when the rotation angle of the reflector 104 is the first measurement angle and received by the antenna device 200 when the rotation angle of the reflector 202 is the receiving target rotation angle, by considering the radio wave reflected by the reflector 202 and received by the radio wave receiving unit 204 as radio waves received by the virtual antenna 250, for example, by performing synthetic aperture processing based on the multiple measurement data. The determination unit 306 performs synthetic aperture processing based on the plurality of measurement data, for example, and considers the radio waves reflected by the reflector 202 at the plurality of second measurement angles and received by the radio wave receiving unit 204 as radio waves received by a virtual array 270 configured with the plurality of virtual antennas 250, thereby determining the radio waves emitted by the antenna device 100 when the rotation angle of the reflector 104 is the first measurement angle and received by the antenna device 200 when the rotation angle of the reflector 202 is the reception target rotation angle. The determination unit 306 performs synthetic aperture processing using, for example, the above-mentioned formula.

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

[0196] The determination unit 306 determines, for example, radio waves emitted by the antenna device 100 at the first measurement angle of the reflector 104 and received by the antenna device 200 when the rotation angle of the reflector 202 is each of the plurality of reception target rotation angles. The determination unit 306 determines, for example, radio waves emitted by the antenna device 100 at the first measurement angle of the reflector 104 and received by the antenna device 200 when the rotation angle of the reflector 202 is each of the plurality of reception target rotation angles at predetermined angular intervals. The determination unit 306 determines, for example, φ SC_Rx By scanning the angle φ, the determination unit 306 determines the radio wave that is emitted by the antenna device 100 at the first measurement angle of the reflector 104 and received by the antenna device 200 when the rotation angle of the reflector 202 is each of the multiple reception target rotation angles. SC_Rx Scan the.

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

[0198] For example, the determination unit 306 determines the radio waves emitted by the antenna device 100 when the rotation angle of the reflector 104 is the emission target rotation angle and received by the antenna device 200 when the rotation angle of the reflector 202 is the second measurement angle, based on radio waves obtained by combining radio waves emitted by the antenna device 100 at each of the multiple first measurement angles of the reflector 104 and received by the antenna device 200 at the second measurement angle of the reflector 202. The determination unit 306 performs synthetic aperture processing based on the multiple pieces of measurement data, for example, to determine the radio waves emitted by the antenna device 100 when the rotation angle of the reflector 104 is the emission target rotation angle and received by the antenna device 200 when the rotation angle of the reflector 202 is the second measurement angle, by regarding the radio waves emitted by the radio wave emitter 102, reflected by the reflector 104, and emitted to the outside as radio waves emitted by the virtual antenna 150. The determination unit 306, for example, performs synthetic aperture processing based on the plurality of measurement data, and considers the radio waves emitted by the radio wave emitter 102, reflected by the reflector 104 at the plurality of first measurement angles, and emitted to the outside as radio waves emitted by a virtual array 170 configured with the plurality of virtual antennas 150, thereby determining the radio waves emitted by the antenna device 100 when the rotation angle of the reflector 104 is the emission target rotation angle and received by the antenna device 200 when the rotation angle of the reflector 202 is the second measurement angle. The determination unit 306 performs synthetic aperture processing, for example, using the above-mentioned formula.

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

[0200] The determination unit 306 determines, for example, radio waves emitted by the antenna device 100 and received by the antenna device 200 at the second measurement angle of the reflector 202 when the rotation angle of the reflector 104 is each of the plurality of output target rotation angles. The determination unit 306 determines, for example, radio waves emitted by the antenna device 100 and received by the antenna device 200 at the second measurement angle of the reflector 202 when the rotation angle of the reflector 104 is each of the plurality of output target rotation angles at predetermined angular intervals. The determination unit 306 determines, for example, φ SC_Tx , and determines the radio wave that is emitted by the antenna device 100 and received by the antenna device 200 at the second measurement angle of the reflector 202 when the rotation angle of the reflector 104 is each of the plurality of emission target rotation angles. The determination unit 306, for example, uses the angle controller 400 to determine the angle φ SC_Tx Scan the.

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

[0202] The determination unit 306 determines, for example, the radio waves emitted by the antenna device 100 when the rotation angle of the reflector 104 is the emission target rotation angle and received by the antenna device 200 when the rotation angle of the reflector 202 is the reception target rotation angle, based on the radio waves obtained by combining the radio waves emitted by the antenna device 100 at each of the multiple first measurement angles and received by the antenna device 200 at multiple second measurement angles. The determination unit 306, for example, performs synthetic aperture processing based on the multiple measurement data, and thereby considers the radio waves emitted by the radio wave emitting unit 102, reflected by the reflecting unit 104, and emitted to the outside as radio waves emitted by the virtual antenna 150, and considers the radio waves reflected by the reflecting unit 202 and received by the radio wave receiving unit 204 as radio waves received by the virtual antenna 250, thereby determining the radio waves emitted by the antenna device 100 when the rotation angle of the reflecting unit 104 is the emission target rotation angle and received by the antenna device 200 when the rotation angle of the reflecting unit 202 is the reception target rotation angle. The determination unit 306 performs synthetic aperture processing based on the plurality of measurement data, for example, to consider radio waves emitted by the radio wave emitter 102, reflected by the reflector 104 at a plurality of first measurement angles, and emitted to the outside as radio waves emitted by a virtual array 170 configured with a plurality of virtual antennas 150, and consider radio waves reflected by the reflector 202 at a plurality of second measurement angles and received by the radio wave receiver 204 as radio waves received by a virtual array 270 configured with a plurality of virtual antennas 250. In this way, the determination unit 306 determines the radio waves emitted by the antenna device 100 when the rotation angle of the reflector 104 is the emission target rotation angle and received by the antenna device 200 when the rotation angle of the reflector 202 is the reception target rotation angle. The determination unit 306 performs synthetic aperture processing using, for example, the above-mentioned formula.

[0203] The determination unit 306 determines, for example, radio waves emitted by the antenna device 100 when the rotation angle of the reflector 104 is each of the plurality of output target rotation angles and received by the antenna device 200 when the rotation angle of the reflector 202 is each of the plurality of receive target rotation angles. The determination unit 306 determines, for example, radio waves emitted by the antenna device 100 when the rotation angle of the reflector 104 is each of the plurality of output target rotation angles at predetermined angle intervals and received by the antenna device 200 when the rotation angle of the reflector 202 is each of the plurality of receive target rotation angles at predetermined angle intervals. The determination unit 306 determines, for example, φ SC_Tx and φ SC_Rx By scanning the angle φ, the determination unit 306 determines radio waves that are emitted by the antenna device 100 when the rotation angle of the reflector 104 is each of the plurality of emission target rotation angles and that are received by the antenna device 200 when the rotation angle of the reflector 202 is each of the plurality of reception target rotation angles. SC_Tx and φ SC_Rx Scan the.

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

[0205] The selection unit 308 selects, for example, a plurality of pieces of measurement data used by the determination unit 306 to determine the radio waves received by the antenna device 200 from a plurality of pieces of measurement data measured by receiving the radio waves emitted by the antenna device 100 with the reflecting unit 202 rotated one or more times relative to the radio wave receiving unit 204. For example, the selection unit 308 selects, from a plurality of pieces of measurement data measured by receiving the radio waves emitted by the antenna device 100 with the reflecting unit 202 rotated one or more times relative to the radio wave receiving unit 204, a plurality of pieces of measurement data used by the determination unit 306 to determine the radio waves received by the antenna device 200. Rx By selecting measurement data centering on measurement data measured by being received by the antenna device 200 when, the determination unit 306 selects multiple measurement data to be used to determine the radio waves received by the antenna device 200.

[0206] The selection unit 308 selects a plurality of measurement data used by the determination unit 306 to determine the radio waves received by the antenna device 200, from a plurality of measurement data measured by receiving, by the antenna device 200, radio waves emitted by the antenna device 100, which rotates the mounting unit 107 around the radio wave emitting unit 102 by one or more revolutions. For example, the selection unit 308 selects a plurality of measurement data used by the determination unit 306 to determine the radio waves received by the antenna device 200, from a plurality of measurement data measured by receiving, by the antenna device 200, radio waves emitted by the antenna device 100, which rotates the mounting unit 107 by one or more revolutions around the radio wave emitting unit 102. Tx By selecting measurement data centering on measurement data measured by receiving by antenna device 200 the radio waves emitted by antenna device 100 when the radio waves are received by antenna device 200, determination unit 306 selects a plurality of measurement data to be used for determining the radio waves received by antenna device 200.

[0207] The selection unit 308 selects a plurality of measurement data used by the determination unit 306 to determine the radio waves received by the antenna device 200 from a plurality of measurement data measured by, for example, receiving radio waves emitted by the antenna device 100 that rotates the mounting unit 107 around the radio wave emitting unit 102 by one or more revolutions and then receiving the radio waves by the antenna device 200 that rotates the reflecting unit 202 by one or more revolutions relative to the radio wave receiving unit 204. ... TxWhen the second measurement angle of the reflecting portion 202 is φ Rx By selecting measurement data centering on measurement data measured by being received by the antenna device 200 when, the determination unit 306 selects multiple measurement data to be used to determine the radio waves received by the antenna device 200.

[0208] The determination unit 306 determines a combination of the rotation angle of the reflector 104 and the rotation angle of the reflector 202 when the radio waves emitted by the antenna device 100 arrive at the antenna device 200 with the maximum electric field strength, based on, for example, the electric field strength of the radio waves emitted by the antenna device 100 at each of the multiple first measurement angles of the reflector 104 and received by the antenna device 200 at each of the multiple second measurement angles of the reflector 202, and the electric field strength of the radio waves emitted by the antenna device 100 at each of the multiple first measurement angles of the reflector 104 and received by the antenna device 200 when the rotation angle of the reflector 202 is each of the multiple receiving target rotation angles. The determination unit 306 determines a combination of the rotation angle of the reflector 104 and the rotation angle of the reflector 202 when the radio waves emitted by the antenna device 100 arrive at the antenna device 200 with the maximum field strength, based on, for example, the field strength of the radio waves emitted by the antenna device 100 when the rotation angle of the reflector 104 is each of the plurality of output target rotation angles and received by the antenna device 200 at the plurality of second measurement angles of the reflector 202. The determination unit 306 determines a combination of the rotation angle of the reflector 104 and the rotation angle of the reflector 202 when the radio waves emitted by the antenna device 100 arrive at the antenna device 200 with the maximum field strength, based on, for example, the field strength of the radio waves emitted by the antenna device 100 when the rotation angle of the reflector 104 is each of the plurality of output target rotation angles and received by the antenna device 200 when the rotation angle of the reflector 104 is each of the plurality of output target rotation angles and received by the antenna device 200 when the rotation angle of the reflector 202 is each of the plurality of receiving target rotation angles.

[0209] For example, the determination unit 306 determines a combination of the rotation angles of the reflecting unit 104 and the reflecting unit 202 when the vertically polarized component of the radio waves emitted by the antenna device 100 reaches the antenna device 200 with the maximum electric field strength. For example, the determination unit 306 determines a combination of the rotation angles of the reflecting unit 104 and the reflecting unit 202 when the horizontally polarized component of the radio waves emitted by the antenna device 100 reaches the antenna device 200 with the maximum electric field strength.

[0210] 17 schematically illustrates an example of the hardware configuration of a computer 1200 functioning as the information processing device 300. A program installed on the computer 1200 can cause the computer 1200 to function as one or more "units" of an apparatus according to the present embodiment, or can cause the computer 1200 to execute operations associated with the apparatus according to the present embodiment or one or more "units," and / or can cause the computer 1200 to execute a process according to the present embodiment or steps of the process. Such a program can be executed by the CPU 1212 to cause the computer 1200 to perform specific operations associated with some or all of the blocks in the flowcharts and block diagrams described herein.

[0211] The computer 1200 according to this embodiment includes a CPU 1212, a RAM 1214, and a graphics controller 1216, which are interconnected by a host controller 1210. The computer 1200 also includes input / output units such as a communications 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 a ROM 1230 and legacy input / output units such as 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 graphics controller 1216 acquires image data generated by the CPU 1212 into a frame buffer or the like provided in the RAM 1214 or into the graphics controller 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 in the computer 1200. The DVD drive 1226 reads programs or data from a DVD-ROM 1227 or the like and provides them 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] The ROM 1230 stores therein a boot program or the like that is executed by the computer 1200 upon activation, and / or programs that depend on the hardware of the computer 1200. The input / output chip 1240 may also connect various input / output units to the input / output controller 1220 via a USB port, a parallel port, a serial port, a keyboard port, a mouse port, etc.

[0215] The programs are provided by a computer-readable storage medium such as a DVD-ROM 1227 or an IC card. The programs are read from the computer-readable storage medium, installed in the storage device 1224, RAM 1214, or ROM 1230, which are also examples of computer-readable storage media, and executed by the CPU 1212. Information processing described in these programs is read by the computer 1200, and causes cooperation between the programs and the various types of hardware resources described above. An apparatus or method may be configured by implementing operations or processing of information in accordance with the use of the computer 1200.

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

[0217] Furthermore, the CPU 1212 may cause all or a necessary portion of a file or database 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 perform various types of processing on the data on the RAM 1214. The CPU 1212 may then 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 on the recording medium and may undergo information processing. The CPU 1212 may perform various types of processing on data read from the RAM 1214, including various types of operations, information processing, conditional judgment, conditional branching, unconditional branching, information search / replacement, etc., as described throughout this disclosure and specified by the instruction sequences of the programs, and write the results back to the RAM 1214. The CPU 1212 may also search for information in a file, database, etc. on the recording medium. For example, if multiple entries, each having an attribute value of a first attribute associated with an attribute value of a second attribute, are stored on the recording medium, the CPU 1212 may search for an entry whose attribute value of the first attribute matches a specified condition from among the multiple entries, read the attribute value of the second attribute stored in the entry, and thereby obtain the attribute value of the second attribute associated with the first attribute that satisfies a predetermined condition.

[0219] The above-described programs or software modules may be stored in a computer-readable storage medium on or near the computer 1200. 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 also be used as a computer-readable storage medium, thereby providing the programs to the computer 1200 via the network.

[0220] The blocks in the flowcharts and block diagrams in the present embodiments may represent stages of a process in which an operation is performed or "parts" of an apparatus responsible for performing the operation. Particular stages and "parts" may be implemented by dedicated circuitry, programmable circuitry provided with computer-readable instructions stored on a computer-readable storage medium, and / or a processor provided with computer-readable instructions stored on a computer-readable storage medium. The dedicated circuitry may include digital and / or analog hardware circuits, including integrated circuits (ICs) and / or discrete circuits. The programmable circuitry may include reconfigurable hardware circuits, such as field programmable gate arrays (FPGAs) and programmable logic arrays (PLAs), including AND, OR, XOR, NAND, NOR, and other logical operations, flip-flops, registers, and memory elements.

[0221] A computer-readable medium may include any tangible device capable of storing instructions that are executed by a suitable device, such that the computer-readable medium having instructions stored thereon comprises an article of manufacture containing instructions that can be executed to create means for performing the operations specified in the flowcharts or block diagrams. Examples of computer-readable media may include electronic, magnetic, optical, electromagnetic, and semiconductor storage media. More specific examples of computer-readable media may include floppy disks, diskettes, hard disks, random access memory (RAM), read-only memory (ROM), erasable programmable read-only memory (EPROM or flash memory), electrically erasable programmable read-only memory (EEPROM), static random access memory (SRAM), compact disc read-only memory (CD-ROM), digital versatile disc (DVD), Blu-ray disc, memory stick, integrated circuit card, and the like.

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

[0223] The computer-readable instructions may be provided to a processor or programmable circuit of a programmable data processing device, such as a computer, locally or via a wide area network (WAN) such as a local area network (LAN) or the Internet, and the computer-readable instructions may be executed to create means for performing the operations specified in the flowcharts or block diagrams. Here, the computer may be a personal computer (PC), a tablet computer, a smartphone, a workstation, a server computer, a general-purpose computer, a special-purpose computer, or the like, or may be a computer system in which multiple computers are connected. Such a computer system in which multiple computers are connected is also called a distributed computing system, and is a broad definition of computer. In a distributed computing system, the multiple computers collectively execute a program by each executing a portion of the program and passing data between the computers as needed during program execution.

[0224] Examples of processors include a computer processor, a central processing unit (CPU), a processing unit, a microprocessor, a digital signal processor, a controller, a microcontroller, etc. A computer may have one or more processors. In a multiprocessor system with multiple processors, each processor executes a portion of a program and passes data between processors as needed during program execution, allowing the multiple processors to collectively execute the program. For example, in multitasking, each of the multiple processors may execute a portion of each task in small chunks by switching tasks at time slice intervals. In this case, which portion of a program each processor executes changes dynamically. Which portion of a program each of the multiple processors executes may also be statically determined by multiprocessor-aware programming.

[0225] Although the present invention has been described above using the embodiments, the technical scope of the present invention is not limited to the scope described in the above embodiments. It will be apparent to those skilled in the art that various modifications and improvements can be made to the above embodiments. It is clear from the claims that such modifications and improvements can also be included within 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, specifications, and drawings is not specifically stated as "before," "prior to," etc., and that the processes can be performed in any order unless the output of a previous process is used in a later process. Even if the operational flow in the claims, specifications, and drawings is described using "first," "next," etc. for convenience, this does not mean that the processes must be performed in this order. [Explanation of symbols]

[0227] 10 system, 100 antenna device, 102 radio wave emitting unit, 103 aperture surface, 104 reflecting unit, 106 supporting unit, 107 mounting unit, 108 angle changing unit, 150 virtual antenna, 152 aperture surface, 170 virtual array, 200 antenna device, 202 reflecting unit, 204 radio wave receiving unit, 205 aperture surface, 206 supporting unit, 208 angle changing unit, 250 virtual antenna, 252 aperture surface, 270 virtual array, 300 information processing device, 302 acquisition unit, 304 storage unit, 306 determination 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 I / O chip

Claims

1. a first antenna device including: a radio wave emitting portion that emits radio waves in the 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 that is shaped like a plate; 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 acquisition unit that acquires a plurality of measurement data measured by the second antenna device by having the radio waves reflected by the first reflector at a first measurement angle and emitted by the first antenna device reflected by the second reflector at a plurality of second measurement angles, and receiving the radio waves; 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 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 system comprising:

2. the acquisition unit acquires the plurality of pieces of measurement data measured by the second antenna device receiving radio waves reflected by the first reflectors at the plurality of first measurement angles and then reflected by the second reflectors 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 equal to 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 equal to 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 reflected by the first reflectors at the plurality of first measurement angles and then reflected by the second reflectors 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 an emission target rotation angle that is not included in the plurality of first measurement angles and that are received by the second antenna device when the rotation angle of the second reflector is the reception target rotation angle.

3. The 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 each of the plurality of first measurement angles and received by the second antenna device when the rotation angle of the second reflector is each of the plurality of second measurement angles.

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 radio wave receiving unit based on the plurality of measurement data, thereby regarding the radio waves radiated by the radio wave emitting unit, 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 processing on each of the openings of the radio wave emitting unit and the radio wave receiving unit using the following formula: [Equation 1] where: [Equation 2] 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, and φ ＳＣ＿Ｒｘ is the second offset angle, E Ｖ (φ Ｒｘ +θ ｎ＿Ｒｘ， φ Ｔｘ +θ ｎ＿Ｔｘ ) is the first measurement angle of the first reflecting portion when φ Ｔｘ +θ ｎ＿Ｔｘ When the second measurement angle of the second reflector is φ, the second measurement angle of the second reflector is φ. Ｒｘ +θ ｎ＿Ｒｘ is the electric field strength 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 AS Ｔｘ is a first angular interval between the plurality of first measured angles, and θ ｎ＿Ｒｘ is n_Rx×AS Ｒｘ and AS Ｒｘ is a second angular interval between the plurality of second measurement angles, and w ｎ＿Ｔｘ is the first Gaussian window, and w ｎ＿Ｒｘ is the second Gaussian window, and k ＳＣ＿Ｔｘ is the 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 is 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 R 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 R 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 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 each of the plurality of receiving target rotation angles at a predetermined third angle interval.

3. The system according to claim 1 or 2.

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

9. 3. The system according to claim 1, 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 the electric field strength of radio waves emitted by the first antenna device when the rotation angle of the first reflector is at each first measurement angle of the plurality of first measurement angles and received by the second antenna device when the rotation angle of the second reflector is at each second measurement angle of the plurality of second measurement angles, and the electric field strength of radio waves emitted by the first antenna device when the rotation angle of the first reflector is at each first measurement angle of the plurality of first measurement angles and received by the second antenna device when the rotation angle of the second reflector is at each receiving target rotation angle of the plurality of 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 emits radio waves in the terahertz wave 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 a 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 and moving the mounting unit around the radio wave radiating unit; and an acquiring unit that acquires a plurality of measurement data measured by receiving radio waves that are reflected by the first reflecting unit at a first measurement angle and are then reflected by the second reflecting unit at a plurality of second measurement angles by the first antenna device; 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 changer 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 emits radio waves in the terahertz wave band or the high SHF band, a first reflector that reflects the radio waves radiated by the radio wave radiator and emits 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 changer 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 to execute.

12. a first antenna device having a radio wave emitting unit that emits radio waves in the terahertz wave 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 that 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 a 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; 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 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, which is reflected by the first reflector at a first measurement angle and is emitted by the first antenna device, by the second reflector at a plurality of second measurement angles; an acquisition step in which the information processing device acquires a plurality of measurement data measured by the second antenna device receiving radio waves reflected by the first reflecting portion at the first measurement angle and then reflected by the second reflecting portion at the plurality of second measurement angles; 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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