Antenna device, processing method, and program

Abstract

To provide an antenna device capable of transmitting transmission power to be required for communication to an antenna while enabling rotation of the antenna on a base in an AZ shaft direction to infinity.SOLUTION: An antenna device comprises: an antenna that performs transmission and reception; an antenna side device that gives / receives a signal to / from the antenna; a base that rotatably supports the antenna; a slip ring that gives / receives an electric signal between a base side device provided to the base and the antenna side device; an optical rotary joint that gives / receives an optical signal between the base side device provided to the base and the antenna side device; and an amplification part that performs a processing for cancelling a fluctuation amount from desired power of an actual transmission signal at an actual angle of the optical rotary joint on the basis of a corresponding relation between each angle of the optical rotary joint and a modulation amount from the desired power of the transmission signal at each angle, and the actual angle of the optical rotary joint.SELECTED DRAWING: Figure 6

Description

[Technical field]

[0001] The present disclosure relates to an antenna device, a processing method, and a program. [Background technology]

[0002] An antenna device that communicates while tracking an artificial satellite includes an antenna having axes (hereinafter referred to as "AZ axis" and "EL axis") that adjust the azimuth angle (AZ (AZimuth) angle) and elevation angle (EL (ELevation) angle), respectively, and tracks the artificial satellite while adjusting the angles around the AZ axis and EL axis. Patent Document 1 discloses a related technology that uses a rotary joint for signal propagation. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2017-020902 A Summary of the Invention [Problem to be solved by the invention]

[0004] In an antenna device that tracks satellites and communicates 24 hours a day without interruption, it is desirable that the antenna on the base can rotate infinitely in the AZ axis direction so that the direction can be freely changed. However, it is necessary to transmit and receive signals between the base side device provided on the base and the antenna side device provided on the antenna side while the antenna continues to rotate. Therefore, when the signal is generally transmitted and received via a cable, when the antenna on the base rotates in the AZ axis direction, the cable winds around the support member extending in that axial direction. Therefore, when the signal is transmitted and received via a cable, the rotatable range of the antenna on the base in the AZ axis direction is limited, and the antenna on the base cannot rotate infinitely in the AZ axis direction. Therefore, it is conceivable to transmit and receive the signal using an optical rotary joint described in Patent Document 1 and the like instead of a cable. The optical rotary joint is a rotary joint that can transmit multiple signals in an infinite rotation state. Therefore, when an optical rotary joint is used, the rotatable range of the antenna on the base in the AZ axis direction is not limited. However, the optical rotary joint cannot pass large power. Therefore, when an optical rotary joint is used, a problem occurs in that the transmission power required for communication cannot be transmitted to the antenna. In addition, when transmitting transmission power to the upper part of the antenna using an optical rotary joint, a problem occurs in that the signal strength varies depending on the rotation angle in the AZ axis direction due to the characteristics of the optical rotary joint. On the other hand, the allowable deviation of transmission power is regulated by the Radio Law. Therefore, the transmission power needs to be kept constant. Therefore, there is a demand for technology that allows the antenna on the base to be infinitely rotatable in the AZ axis direction and can transmit the transmission power required for communication to the antenna.

[0005] Each aspect of the present disclosure aims to provide an antenna device, a processing method, and a program that can solve the above problems. [Means for solving the problem]

[0006] In order to achieve the above-mentioned object, according to one aspect of the present disclosure, an antenna device includes an antenna for transmitting and receiving signals, an antenna side device for exchanging signals with the antenna, a base for rotatably supporting the antenna, a slip ring for exchanging electrical signals between the base side device provided on the base and the antenna side device, an optical rotary joint for exchanging optical signals between the base side device provided on the base and the antenna side device, and an amplifier unit that performs processing to cancel out the amount of variation of the actual transmission signal from a desired power at the actual angle of the optical rotary joint based on the corresponding relationship between each angle of the optical rotary joint and the amount of variation of the transmission signal from a desired power at each angle, and the actual angle of the optical rotary joint.

[0007] In order to achieve the above-mentioned object, according to another aspect of the present disclosure, a processing method is a processing method performed by an antenna device including an antenna for transmitting and receiving, an antenna side device for exchanging signals with the antenna, a base for rotatably supporting the antenna, a slip ring for exchanging electrical signals between the base side device provided on the base and the antenna side device, and an optical rotary joint for exchanging optical signals between the base side device provided on the base and the antenna side device, the processing method including performing processing to cancel out the amount of variation of the actual transmission signal from a desired power at the actual angle of the optical rotary joint based on a correspondence between each angle of the optical rotary joint and the amount of variation of the transmission signal from a desired power at each angle, and the actual angle of the optical rotary joint.

[0008] In order to achieve the above-mentioned object, according to another aspect of the present disclosure, a program causes a computer of an antenna device including an antenna for transmitting and receiving, an antenna side device for exchanging signals with the antenna, a base for rotatably supporting the antenna, a slip ring for exchanging electrical signals between the base side device provided on the base and the antenna side device, and an optical rotary joint for exchanging optical signals between the base side device provided on the base and the antenna side device to execute a process of controlling the amplification of the amplifier unit to cancel out the amount of variation of the actual transmission signal from a desired power at the actual angle of the optical rotary joint, based on the corresponding relationship between each angle of the optical rotary joint and the amount of variation of the transmission signal from a desired power at each angle, and the actual angle of the optical rotary joint. Effect of the Invention

[0009] According to each aspect of the present disclosure, the antenna on the base can be infinitely rotatable in the AZ axis direction, and the transmission power required for communication can be transmitted to the antenna. [Brief description of the drawings]

[0010] [Figure 1] 1 is a diagram illustrating an example of a configuration of an antenna device according to an embodiment of the present disclosure. [Diagram 2] 2 is a diagram showing an example of the configuration of an antenna side device and a base side device according to an embodiment of the present disclosure. FIG. [Diagram 3] FIG. 2 is a diagram illustrating an example of a configuration of a transmission processing unit according to an embodiment of the present disclosure. [Figure 4] FIG. 13 is a diagram illustrating an example of a data table according to an embodiment of the present disclosure. [Diagram 5] FIG. 11 is a diagram illustrating an example of a processing flow of an antenna device according to an embodiment of the present disclosure. [Figure 6] FIG. 2 is a diagram illustrating a minimum configuration of an antenna device according to an embodiment of the present disclosure. [Figure 7] FIG. 11 is a diagram illustrating an example of a processing flow of an antenna device having a minimum configuration according to an embodiment of the present disclosure. [Figure 8] FIG. 1 is a schematic block diagram illustrating a configuration of a computer according to at least one embodiment. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0011] Hereinafter, the embodiments will be described in detail with reference to the drawings. <Embodiment> (Configuration of the Antenna Device) An antenna device 1 according to an embodiment of the present disclosure will be described with reference to the drawings. The antenna device 1 is a device that communicates while tracking an artificial satellite, can rotate infinitely around the AZ (AZimuth) axis, and can realize a desired transmission signal magnitude.

[0012] 1 is a diagram illustrating an example of a configuration of an antenna device 1 according to an embodiment of the present disclosure. As shown in FIG. 1, the antenna device 1 includes an antenna 10, an antenna side device 20, a base 30, a base side device 40, a slip ring 50, and an optical rotary joint 60.

[0013] Antenna 10 transmits and receives signals to and from a tracking target such as an artificial satellite. Antenna 10 has a function of concentrating received signals at a focal position using one or more reflectors with curved surfaces, such as a parabolic antenna, a Cassegrain antenna, a Gregorian antenna, or a ring focus antenna, or of sending transmitted signals from the focal position to a reflector.

[0014] The antenna side device 20 transmits and receives signals to and from the antenna 10. The antenna side device 20 also transmits and receives signals to and from the base side device 40 via a slip ring 50 and an optical rotary joint 60. Details of the antenna side device 20 will be described later. The base 30 supports the antenna 10 and the antenna side device 20 rotatably.

[0015] The base-side device 40 is provided inside the base 30 or around the base 30. The base-side device 40 transmits and receives signals to and from the antenna-side device 20 via an optical rotary joint 60 and a slip ring 50. The base-side device 40 will be described in detail later.

[0016] The slip ring 50 transmits and receives electrical signals between the antenna side device 20 and the base side device 40. The optical rotary joint 60 transmits and receives optical signals between the antenna side device 20 and the base side device 40.

[0017] Here, details of the antenna side device 20 and the base side device 40 will be described. Fig. 2 is a diagram showing an example of the configuration of the antenna side device 20 and the base side device 40 according to an embodiment of the present disclosure. Note that Fig. 2 also shows an antenna 10, a slip ring 50, and an optical rotary joint 60.

[0018] As shown in FIG. 2, the antenna side device 20 includes a reception processing unit 201, a transmission processing unit 202, an electrical / optical conversion unit 203, an optical / electrical conversion unit 204, and an antenna driving unit 205.

[0019] The reception processing unit 201 receives a reception signal from the antenna 10. The reception processing unit 201 performs a predetermined process on the received reception signal. Examples of the predetermined process include amplification and frequency conversion (e.g., down-conversion). The reception processing unit 201 outputs to the electrical / optical conversion unit 203 a reception signal to be transmitted to the base side device 40, among the reception signals that have already been subjected to the predetermined process.

[0020] The transmission processing unit 202 converts the transmission signal into a signal of a predetermined magnitude and outputs the signal to the antenna 10. Fig. 3 is a diagram illustrating an example of the configuration of the transmission processing unit 202 according to an embodiment of the present disclosure. As shown in Fig. 3, the transmission processing unit 202 includes a storage unit 2021, an acquisition unit 2022, a determination unit 2023, and an amplification unit 2024.

[0021] The storage unit 2021 stores information necessary for various processes performed by the antenna side device 20. For example, the storage unit 2021 associates each angle of the optical rotary joint 60 with the amount of variation from the desired power of the transmission signal at each angle and stores the association as a data table TBL1. Note that the correspondence between each angle of the optical rotary joint 60 and the amount of variation from the desired power of the transmission signal at each angle may be obtained, for example, by acquiring the correspondence in advance. The amount of variation may be an amount indicated by an absolute value. The amount of variation may be an amount indicated by a relative value such as a magnification with respect to the desired power. FIG. 4 is a diagram showing an example of the data table TBL1 in an embodiment of the present disclosure. For example, in the data table TBL1 shown in FIG. 4, the angle 1 of the optical rotary joint 60 is associated with the amount of variation 1 from the desired power of the transmission signal. In addition, in the data table TBL1, the angle 2 of the optical rotary joint 60 is associated with the amount of variation 2 from the desired power of the transmission signal. Furthermore, in the data table TBL1, the angle 3 of the optical rotary joint 60 is associated with the amount of deviation 3 from the desired power of the transmission signal.

[0022] The acquiring unit 2022 acquires information including the current angle (an example of an actual angle) of the optical rotary joint 60. For example, if the optical rotary joint 60 can know its own current angle, the acquiring unit 2022 acquires information including the current angle directly from the optical rotary joint 60. Alternatively, if the optical rotary joint 60 cannot know its own current angle, the acquiring unit 2022 receives control content from an antenna drive control unit 405 (described later) that controls the drive of the antenna 10, via the slip ring 50, or from an antenna drive unit 205 that receives a control signal from the antenna drive control unit 405. The acquiring unit 2022 may then specify the current angle of the optical rotary joint 60 by calculating the current angle from the received control content.

[0023] In addition, in each embodiment of the present disclosure, processes such as "obtaining" and "receiving" are not limited to directly receiving an object (including information) itself, but may also include cases in which an object (including information) received directly is turned into an object by performing calculations, processing, etc.

[0024] The identifying unit 2023 identifies an angle that matches the current angle of optical rotary joint 60 included in the information acquired by the acquiring unit 2022, in data table TBL1 stored in the memory unit 2021. Then, the identifying unit 2023 identifies a fluctuation amount associated with the identified angle in data table TBL1. For example, if the current angle of optical rotary joint 60 included in the information acquired by the acquiring unit 2022 is angle 1, the identifying unit 2023 identifies angle 1 in data table TBL1. Then, the identifying unit 2023 identifies fluctuation amount 1 associated with the identified angle 1 in data table TBL1.

[0025] The amplification unit 2024 performs a process of canceling the amount of fluctuation identified by the identification unit 2023. For example, the amplification unit 2024 changes its own amplification factor for amplifying the transmission signal to an amplification factor that cancels the amount of fluctuation identified by the identification unit 2023. Also, for example, the amplification unit 2024 adds a new amplifier or attenuator that cancels the amount of fluctuation identified by the identification unit 2023. The amplification unit 2024 outputs the transmission signal after the process of canceling the amount of fluctuation identified by the identification unit 2023 to the antenna 10.

[0026] The electrical / optical converter 203 receives an electrical signal from the reception processor 201. The electrical / optical converter 203 converts the received electrical signal into an optical signal. The electrical / optical converter 203 outputs the converted optical signal to the optical rotary joint 60.

[0027] The optical / electrical converter 204 receives an optical signal from the optical rotary joint 60. The optical / electrical converter 204 converts the received optical signal into an electrical signal. The optical / electrical converter 204 outputs the converted electrical signal to the transmission processor 202.

[0028] The antenna driving unit 205 drives the antenna 10 under the control of the antenna driving control unit 405 described later so that the antenna 10 is oriented in a desired direction. Specifically, the antenna driving unit 205 receives a driving control signal for changing the orientation of the antenna 10 from the antenna driving control unit 405 via the slip ring 50. The driving control signal is a signal including power or an electric signal for obtaining a torque or a number of rotations required for driving the antenna 10 in the elevation angle direction (around the EL (ELevation) axis) and the azimuth angle direction (around the AZ axis). Then, the antenna driving unit 205 changes the orientation of the antenna 10 in response to the received driving control signal.

[0029] As shown in FIG. 2, the base side device 40 includes a reception processing unit 401, a transmission processing unit 402, an electrical / optical conversion unit 403, an optical / electrical conversion unit 404, and an antenna drive control unit 405.

[0030] The reception processing unit 401 receives an electric signal from the optical / electrical conversion unit 404. The reception processing unit 401 performs a predetermined process on the received electric signal. Examples of the predetermined process include demodulation process, processing of status monitoring data (i.e., telemetry) which is information necessary for monitoring the status of the satellite on the ground, and processing of antenna pointing error information with respect to the satellite. The antenna pointing error information includes information on a sum signal and a difference signal for making the antenna track the satellite using a monopulse tracking method. The sum signal is a signal with a property that the signal level is maximum when facing the satellite directly, and the signal level decreases when the pointing is deviated from the satellite direction. The difference signal is a signal with a property that the signal level is minimum when facing the satellite directly, and the signal level increases when the pointing is deviated from the satellite direction, and the phase shifts with respect to the sum signal depending on the direction of the deviation. The processing of antenna pointing error information includes a process of calculating the angle error of the AZ axis and the angle error of the EL axis of the antenna from the sum signal and the difference signal. These predetermined processes may be performed using well-known techniques. The status monitoring data includes information indicating the temperature inside the satellite, the voltage at specific locations inside the satellite, the attitude of the satellite, the status of the equipment on board the satellite, and the like.

[0031] The transmission processing unit 402 outputs the transmission signal that has been subjected to predetermined processing to the antenna side device 20 via the electrical / optical conversion unit 403 and the optical rotary joint 60. Examples of the predetermined processing include modulation processing, processing for generating a transmission signal of a predetermined magnitude, and the like.

[0032] The electrical / optical converter 403 receives an electrical signal from the transmission processor 402. The electrical / optical converter 403 converts the received electrical signal into an optical signal. The electrical / optical converter 403 outputs the converted optical signal to the optical rotary joint 60.

[0033] The optical / electrical converter 404 receives an optical signal from the optical rotary joint 60. The optical / electrical converter 404 converts the received optical signal into an electrical signal. The optical / electrical converter 404 outputs the converted electrical signal to the reception processor 401.

[0034] The antenna drive control unit 405 generates a drive control signal for driving the antenna 10 so that the antenna 10 is oriented in a desired direction (i.e., in the direction of the satellite) based on the antenna pointing error information. The antenna pointing error information is information that indicates how much the antenna is deviated from the satellite direction when the antenna is oriented in the direction of the target satellite using a monopulse tracking method or the like. This antenna pointing error information is also called angle error information. This angle error information is generated by a higher-order mode coupler or the like provided on the antenna side based on the angle error between the direction the antenna is oriented and the direction in which the satellite actually exists, and a sum signal and a difference signal are generated from the signal received by the antenna. These sum signal and difference signal are each transmitted to the reception processing unit 401. Then, the reception processing unit 401 calculates the angle error of each of the AZ axis and the EL axis from the phase difference, level difference, etc. between the sum signal and the difference signal. Then, the antenna drive control unit 405 outputs the generated drive control signal to the antenna side device 20 via the slip ring 50.

[0035] The above-described processing performed by the antenna device 1 is merely an example, and the processing performed by the antenna device 1 is not limited to the above-described processing. For example, the antenna device 1 may perform the processing described below.

[0036] (Processing performed by the antenna device) FIG. 5 is a diagram showing an example of a processing flow of the antenna device 1 according to an embodiment of the present disclosure. Next, a process performed by the antenna device 1 to set the magnitude of the transmission signal output by the antenna side device 20 to the antenna 10 to a desired magnitude will be described with reference to FIG. 5. It is assumed that the reception processing unit 401 processes antenna pointing error information. It is also assumed that the antenna drive control unit 405 generates a drive control signal for driving the antenna 10 so that the orientation of the antenna 10 is a desired orientation (i.e., an orientation facing a direction of an artificial satellite) based on the antenna pointing error information performed by the reception processing unit 401. It is also assumed that the antenna drive control unit 405 outputs the generated drive control signal to the antenna side device 20 via the slip ring 50. It is also assumed that the antenna drive unit 205 drives the antenna 10 under the control of the antenna drive control unit 405 so that the orientation of the antenna 10 is a desired orientation.

[0037] The transmission processing unit 402 outputs the transmission signal that has been subjected to a predetermined process to the antenna side device 20 via the electrical / optical conversion unit 403 and the optical rotary joint 60. The electrical / optical conversion unit 403 receives an electrical signal from the transmission processing unit 402. The electrical / optical conversion unit 403 converts the received electrical signal into an optical signal. The electrical / optical conversion unit 403 outputs the converted optical signal to the optical rotary joint 60.

[0038] The optical / electrical converter 204 receives an optical signal from the optical rotary joint 60. The optical / electrical converter 204 converts the received optical signal into an electrical signal. The optical / electrical converter 204 outputs the converted electrical signal to the transmission processor 202.

[0039] The acquiring unit 2022 acquires information including the current angle of the optical rotary joint 60 (step S1). The identifying unit 2023 identifies an angle that matches the current angle of the optical rotary joint 60 included in the information acquired by the acquiring unit 2022, in a data table TBL1 stored in the memory unit 2021 (step S2). Then, the identifying unit 2023 identifies a fluctuation amount associated with the identified angle in the data table TBL1 (step S3).

[0040] The amplifier 2024 performs a process to cancel the amount of fluctuation identified by the identifier 2023 (step S4). The amplifier 2024 outputs the transmission signal after the process to cancel the amount of fluctuation identified by the identifier 2023 has been performed to the antenna 10. The antenna 10 transmits a signal to the tracking target artificial satellite (step S5).

[0041] (advantage) The antenna device 1 according to an embodiment of the present disclosure has been described above. In the antenna device 1, the antenna 10 transmits and receives signals. The base 30 rotatably supports the antenna 10 and the antenna side device 20 that transmits and receives signals to and from the antenna 10. The slip ring 50 transmits and receives electrical signals between the base side device 40 provided on the base 30 and the antenna side device 20. The optical rotary joint 60 transmits and receives optical signals between the base side device 40 provided on the base 30 and the antenna side device 20. The amplifier 2024 performs a process of canceling the amount of fluctuation of the actual transmission signal from the desired power at the actual angle of the optical rotary joint 60 based on the correspondence between each angle of the optical rotary joint 60 and the amount of fluctuation of the transmission signal from the desired power at each angle, and the actual angle of the optical rotary joint 60. This antenna device 1 makes it possible to infinitely rotate the antenna on the base in the AZ axis direction, and to transmit the transmission power required for communication to the antenna.

[0042] 6 is a diagram showing a minimum configuration of the antenna device 1 according to the embodiment of the present disclosure. The antenna device 1 includes an antenna 10, a base 30, a slip ring 50, an optical rotary joint 60, and an amplifier unit 2024, as shown in FIG.

[0043] The antenna 10 transmits and receives signals. The base 30 rotatably supports the antenna 10 and the antenna side device 20 that transmits and receives signals to and from the antenna 10. The slip ring 50 transmits and receives electrical signals between the base side device 40 provided on the base 30 and the antenna side device 20. The optical rotary joint 60 transmits and receives optical signals between the base side device 40 provided on the base 30 and the antenna side device 20. The amplifier 2024 performs a process of canceling the amount of fluctuation from the desired power of the actual transmission signal at the actual angle of the optical rotary joint 60 based on the corresponding relationship between each angle of the optical rotary joint 60 and the amount of fluctuation from the desired power of the transmission signal at each angle, and the actual angle of the optical rotary joint 60.

[0044] The antenna 10 can be realized, for example, by using the function of the antenna 10 illustrated in FIG. 1. The base 30 can be realized, for example, by using the function of the base 30 illustrated in FIG. 1. The slip ring 50 can be realized, for example, by using the function of the slip ring 50 illustrated in FIG. 1. The optical rotary joint 60 can be realized, for example, by using the function of the optical rotary joint 60 illustrated in FIG. 1. The amplifier 2024 can be realized, for example, by using the function of the amplifier 2024 illustrated in FIG. 3.

[0045] 7 is a diagram showing an example of a processing flow of the antenna device 1 with a minimum configuration according to the embodiment of the present disclosure. Next, processing of the antenna device 1 with a minimum configuration according to the embodiment of the present disclosure will be described with reference to FIG.

[0046] In an antenna device 1 including an antenna 10 for transmitting and receiving signals, an antenna side device 20 for transmitting and receiving signals to and from the antenna 10, a base 30 for supporting the antenna 10 so as to be freely rotatable, a slip ring 50 for transmitting and receiving electrical signals between the base side device 40 provided on the base 30 and the antenna side device 20, and an optical rotary joint 60 for transmitting and receiving optical signals between the base side device 40 provided on the base 30 and the antenna side device 20, an amplifier unit 2024 performs a process of canceling out the amount of variation from the desired power of the actual transmission signal at the actual angle of the optical rotary joint 60, based on the corresponding relationship between each angle of the optical rotary joint 60 and the amount of variation from the desired power of the transmission signal at each angle, and the actual angle of the optical rotary joint 60 (step S101).

[0047] The above describes the minimum configuration of the antenna device 1 according to the embodiment of the present disclosure. This antenna device 1 enables the antenna mounted on the base to be infinitely rotatable in the AZ axis direction, and also enables the transmission power required for communication to be transmitted to the antenna.

[0048] It should be noted that the order of the processes in the embodiments of the present disclosure may be changed as long as appropriate processes are performed.

[0049] Although the embodiment of the present disclosure has been described, the above-mentioned antenna device 1, antenna side device 20, base side device 40, and other control devices may have a computer system inside. The above-mentioned process steps are stored in a computer-readable recording medium in the form of a program, and the above-mentioned process is performed by the computer reading and executing this program. Specific examples of computers are shown below.

[0050] 8 is a schematic block diagram showing the configuration of a computer according to at least one embodiment. As shown in FIG. 8, the computer 5 includes a CPU (Central Processing Unit) 6, a main memory 7, a storage 8, and an interface 9.

[0051] For example, the above-mentioned antenna device 1, antenna side device 20, base side device 40, and other control devices are each implemented in a computer 5. The operations of the above-mentioned processing units are stored in the storage 8 in the form of a program. The CPU 6 reads the program from the storage 8, loads it in the main memory 7, and executes the above-mentioned processing in accordance with the program. The CPU 6 also secures storage areas in the main memory 7 corresponding to the above-mentioned storage units in accordance with the program.

[0052] Examples of the storage 8 include a hard disk drive (HDD), a solid state drive (SSD), a magnetic disk, a magneto-optical disk, a compact disc read only memory (CD-ROM), a digital versatile disc read only memory (DVD-ROM), and a semiconductor memory. The storage 8 may be an internal medium directly connected to the bus of the computer 5, or an external medium connected to the computer 5 via an interface 9 or a communication line. In addition, when the program is distributed to the computer 5 via a communication line, the computer 5 that receives the program may load the program into the main memory 7 and execute the above-mentioned process. In at least one embodiment, the storage 8 is a non-transitory tangible storage medium.

[0053] The program may also realize some of the functions described above. Furthermore, the program may be a file that can realize the functions described above in combination with a program already recorded in the computer system, that is, a so-called differential file (differential program).

[0054] Although some embodiments of the present disclosure have been described, these embodiments are merely examples and do not limit the scope of the disclosure. Various additions, omissions, substitutions, and modifications may be made to these embodiments without departing from the spirit of the disclosure.

[0055] Note that some or all of the above-described embodiments can be described as, but are not limited to, the following supplementary notes.

[0056] (Appendix 1) An antenna for transmitting and receiving signals; an antenna side device for transmitting and receiving signals between the antenna and a base for rotatably supporting the antenna; a slip ring for transmitting and receiving electrical signals between a base-side device and the antenna-side device provided on the base; an optical rotary joint for transmitting and receiving optical signals between a base-side device and the antenna-side device provided on the base; an amplifier that performs a process to cancel out the amount of deviation from a desired power of an actual transmission signal at an actual angle of the optical rotary joint, based on a correspondence relationship between each angle of the optical rotary joint and the amount of deviation from a desired power of a transmission signal at each angle, and on the actual angle of the optical rotary joint; An antenna device comprising:

[0057] (Appendix 2) a storage unit that stores a data table indicating a correspondence relationship between each angle of the optical rotary joint and an amount of deviation from a desired power of a transmission signal at each angle; 2. The antenna device according to claim 1, comprising:

[0058] (Appendix 3) an acquisition unit for acquiring information including an actual angle of the optical rotary joint; 3. The antenna device according to claim 1 or 2, comprising:

[0059] (Appendix 4) The acquisition unit is acquiring information including an actual angle of the optical rotary joint from the optical rotary joint or an antenna drive control unit that generates a control signal for driving the antenna; 4. The antenna device according to claim 3.

[0060] (Appendix 5) The antenna is Transmitting the transmission signal after the amplification unit has performed the process of canceling the amount of fluctuation. 5. An antenna device according to claim 1,

[0061] (Appendix 6) A processing method performed by an antenna device including an antenna for transmitting and receiving signals, an antenna side device for transmitting and receiving signals to and from the antenna, a base for rotatably supporting the antenna, a slip ring for transmitting and receiving electrical signals between the base side device provided on the base and the antenna side device, and an optical rotary joint for transmitting and receiving optical signals between the base side device provided on the base and the antenna side device, comprising: performing a process of canceling the amount of deviation from a desired power of an actual transmission signal at an actual angle of the optical rotary joint, based on a correspondence relationship between each angle of the optical rotary joint and an amount of deviation from a desired power of a transmission signal at each angle, and an actual angle of the optical rotary joint; A processing method comprising:

[0062] (Appendix 7) a computer for an antenna device including an antenna for transmitting and receiving, an antenna side device for sending and receiving signals to and from the antenna, a base for rotatably supporting the antenna, a slip ring for sending and receiving electrical signals between the base side device provided on the base and the antenna side device, an optical rotary joint for sending and receiving optical signals between the base side device provided on the base and the antenna side device, and an amplifier; performing a process of controlling amplification of the amplifier unit to cancel out the amount of variation from a desired power of an actual transmission signal at an actual angle of the optical rotary joint, based on a correspondence relationship between each angle of the optical rotary joint and an amount of variation from a desired power of a transmission signal at each angle, and an actual angle of the optical rotary joint; A program that executes the following. [Explanation of symbols]

[0063] 1. Antenna device 5. Computers 6. CPU 7. Main memory 8. Storage 9. Interface 10 Antenna 10 20 Antenna side equipment 30... Base 40 Base side equipment 50···Slip ring 60···Optical rotary joint 201, 401... Reception processing unit 202, 402: Transmission processing unit 203, 403 Electrical / optical conversion section 204, 404... Optical / electrical conversion section 205 Antenna drive unit 405 Antenna drive control unit 2021...Storage Department 2022...Acquisition Department 2023...Specific Department 2024 Amplification section

Claims

1. An antenna for transmitting and receiving; an antenna side device for transmitting and receiving signals between the antenna and a base for rotatably supporting the antenna; a slip ring for transmitting and receiving electrical signals between a base-side device and the antenna-side device provided on the base; an optical rotary joint for transmitting and receiving optical signals between a base-side device and the antenna-side device provided on the base; an amplifier that performs a process to cancel out the amount of deviation from a desired power of an actual transmission signal at an actual angle of the optical rotary joint, based on a correspondence relationship between each angle of the optical rotary joint and the amount of deviation from a desired power of a transmission signal at each angle, and on the actual angle of the optical rotary joint; An antenna device comprising:

2. a storage unit that stores a data table indicating a correspondence relationship between each angle of the optical rotary joint and an amount of deviation from a desired power of a transmission signal at each angle; The antenna device according to claim 1 ,

3. an acquisition unit for acquiring information including an actual angle of the optical rotary joint; The antenna device according to claim 1 or 2, comprising:

4. The acquisition unit is acquiring information including an actual angle of the optical rotary joint from the optical rotary joint or an antenna drive control unit that generates a control signal for driving the antenna; 4. The antenna device according to claim 3.

5. The antenna is Transmitting the transmission signal after the amplification unit has performed the process of canceling the amount of fluctuation.

2. The antenna device according to claim 1.

6. A processing method performed by an antenna device including an antenna for transmitting and receiving signals, an antenna side device for transmitting and receiving signals to and from the antenna, a base for rotatably supporting the antenna, a slip ring for transmitting and receiving electrical signals between the base side device provided on the base and the antenna side device, and an optical rotary joint for transmitting and receiving optical signals between the base side device provided on the base and the antenna side device, comprising: performing a process of canceling the amount of deviation from a desired power of an actual transmission signal at an actual angle of the optical rotary joint, based on a correspondence relationship between each angle of the optical rotary joint and an amount of deviation from a desired power of a transmission signal at each angle, and an actual angle of the optical rotary joint; A processing method comprising:

7. a computer for an antenna device including an antenna for transmitting and receiving, an antenna side device for sending and receiving signals to and from the antenna, a base for rotatably supporting the antenna, a slip ring for sending and receiving electrical signals between the base side device provided on the base and the antenna side device, an optical rotary joint for sending and receiving optical signals between the base side device provided on the base and the antenna side device, and an amplifier; performing a process of controlling amplification of the amplifier unit to cancel out the amount of variation from a desired power of an actual transmission signal at an actual angle of the optical rotary joint, based on a correspondence relationship between each angle of the optical rotary joint and an amount of variation from a desired power of a transmission signal at each angle, and an actual angle of the optical rotary joint; A program that executes the following.

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