Transmitting Phased Array Antenna System

Abstract

To improve the communication quality of a phased array antenna system composed of multiple satellites. [Solution] A transmitting phased array antenna system 2S comprises a plurality of array element satellites 10 arranged in an array and a transmitting / receiving satellite 20, wherein the transmitting / receiving satellite performs modulation processing to modulate a reference frequency signal with a predetermined signal and outputs a first transmission signal toward each of the plurality of array element satellites, each array element satellite receives the first transmission signal transmitted from the transmitting / receiving satellite, performs demodulation processing corresponding to the modulation processing on the first received signal generated based on the reception of the first transmission signal, changes the phase of the output based at least on the distance between the transmitting / receiving satellite and the array element satellite and the distance between the array element satellite and the receiver, and outputs a second transmission signal with the phase shift toward the receiver.

Description

[[Technical Field]]

[0001] The present disclosure relates to a transmission phased array antenna system. [[Background Art]]

[0002] A large number of small satellites are arranged in outer space to perform formation flight, and by causing wireless communication to be performed between these small satellites, it has been proposed to make them function as a wired-less phased array antenna. For example, Patent Document 1 describes that a plurality of small satellites constitute a phased array antenna system and relay communication between communication devices on the ground. [[Prior Art Documents]] [[Patent Documents]]

[0003] [[Patent Document 1]] Japanese Patent No. 7416468 [[Summary of the Invention]] [[Problem to be Solved by the Invention]]

[0004] However, the small satellites constituting the above-mentioned phased array antenna system receive not only signals transmitted from ground devices, but also signals transmitted and received between satellites, and it is desired to prevent interference and crosstalk between these signals.

[0005] One object of the present disclosure is to provide a phased array antenna system constituted by a plurality of satellites to improve communication quality of the system. [[Means for Solving the Problem]]

[0006] The transmission phased array antenna system according to the present disclosure includes a plurality of antennas arranged in an array​ A transmitting phased array antenna system comprising a first aircraft and a second aircraft. The second aircraft performs modulation processing, which modulates the reference frequency signal with a predetermined signal. Based on the means and the output from the modulation means, the first transmission signal is transmitted to each of the first flights of a plurality of first aircraft. It comprises a first transmission means that outputs towards the body, and each of the multiple first flying bodies is a second A first receiving means for receiving a first transmission signal transmitted from an aircraft, and the first receiving means for receiving a first transmission signal Modulation processing is performed on the first received signal, which is generated based on the reception of the transmitted signal, and demodulation processing is performed on the first received signal. A demodulation means that performs this operation, and the phase of the output from the demodulation means is determined by the distance between the second aircraft and the first aircraft. Phase shifting means that changes based on at least the distance between the first flying object and the receiver. Based on the output from the phase shifting means, the second transmitter outputs a second transmission signal toward the receiver. It has steps and features. [Effects of the Invention]

[0007] According to this disclosure, the flow of a phased array antenna system composed of multiple satellites This will make it possible to improve the quality of trust. [Brief explanation of the drawing]

[0008] [Figure 1] This is a conceptual diagram showing the schematic configuration of the satellite communication system according to this embodiment. [Figure 2] This is a block diagram showing an example of the functional configuration of a phased array antenna system. [Figure 3] This diagram illustrates the configuration of a receiving phased array antenna system. [Figure 4] This diagram illustrates the configuration of a transmitting phased array antenna system. [Figure 5] This figure shows a first modified example of a phased array antenna system. [Figure 6] It is a diagram showing a second modification of the phased array antenna system. [Figure 7] It is a diagram showing a third modification of the phased array antenna system. MODE FOR CARRYING OUT THE INVENTION

[0009] Embodiments of the present disclosure will be described with reference to the accompanying drawings.

[0010] (1) Overview of Satellite Communication System 1 FIG. 1 is a conceptual diagram for explaining an overview of the satellite communication system 1 according to the present embodiment. The satellite communication system 1 includes a phased array antenna system 2, a transmitter 3, and a receiver 4 .

[0011] The phased array antenna system 2 includes a plurality of array element satellites 10 and at least one transmit / receive satellite 20. At least a part of the plurality of array element satellites 10 included in the phased array antenna system 2 are arranged in an array. The arrangement of the array element satellites 10 is not particularly limited, and may be, for example, linear, planar, grid, concentric, or any other arrangement. The transmit / receive satellite 20 may be arranged in an array together with at least a part of the array element satellites 10 included in the phased array antenna system 2.

[0012] In the present embodiment, microsatellites are used as the array element satellites 10 and / or the transmit / receive satellites 20 . The array element satellites 10 and the transmit / receive satellites 20 may be collectively referred to as "satellites 100" in some cases. For example, the size of one satellite 100 is several centimeters to several tens of centimeters. The total number N of satellites 100 constituting the phased array antenna system 2 is not particularly limited. The satellite 1 The total number of 00s N may be several hundred, several thousand, or even tens of thousands or more. Between 100 adjacent satellites The distance between them is, for example, a few centimeters to tens of centimeters. The distance between 100 adjacent satellites is about the wavelength. It may be shorter than the wavelength (e.g., assumed frequency band = 0.8GHz~60GHz). z). The altitude of each of the 100 satellites is, for example, several hundred kilometers to several thousand kilometers.

[0013] Multiple satellites 100 of the phased array antenna system 2 are in a predetermined orbit. By flying, GCO (General Circular Orbit) and Formation flight (flight in formation) along the code disc trajectory is permitted. Each satellite 100 constituting the arrayed antenna system 2 performs formation flight In this configuration, the arrangement of each satellite 100 is set on a virtual plane (self It may fly in a manner that rotates on its axis (at the turning point).

[0014] At least some of the satellites 100 in the phased array antenna system 2 are for receiving The phased array antenna system 2R (Figure 3) is configured, and the transmission is transmitted from transmitter 3. The signal may be received. Also, the phased array antenna system 2 has at least Some of the satellites 100 constitute a transmitting phased array antenna system 2S (Figure 4), The transmitter may transmit a signal to receiver 4. The phased array antenna system 2 is the transmitter. Communication between 3 and receiver 4 may be relayed. That is, the transmitting phased array antenna The NA system 2S is a receiving phased array antenna system 2R that transmits from transmitter 3. A transmission signal is generated based on the signal generated by receiving the signal, and this is sent to receiver 4 It may also be transmitted to multiple satellites 100. Multiple receiving phased array antenna systems 2R and / or multiple may be configured thereby. It may also be equipped with a phased array antenna system 2S for transmitting. These multiple receiving Phased array antenna system 2R and / or multiple transmitting phased array antennas System 2S each communicates individually with the ground station (transmitter 3 and / or receiver 4). That's fine.

[0015] The transmitter 3 and receiver 4 are not particularly limited. For example, the transmitter 3 and receiver 4 are smartphones. It may also be a mobile station such as a phone. In this case, a phased array antenna system 2 At least some of the satellites 100 are connected to the mobile station (transmitter 3 and / or receiver 4) A service link may be configured. Also, for example, the transmitter 3 and receiver 4 are at a base station. This is also acceptable. In this case, at least some of the satellites 1 of the phased array antenna system 2 00 is a feeder link or service between the base station (transmitter 3 and / or receiver 4) and the base station. A SLINK configuration may be used. The transmitter 3 and receiver 4 are provided together in a single device. It's okay if it's done that way.

[0016] (2) Configuration of Phased Array Antenna System 2 Figure 2 shows the functional configuration of the phased array antenna system 2 provided by the satellite communication system 1. This is an example block diagram. Phased array antenna system 2 consists of multiple arrays. The system comprises an element satellite 10 and a transmitting / receiving satellite 20. In the example shown in Figure 2, a phased array antenna is used. System 2 functions as a receiving phased array antenna system 2R and a transmitting phased array antenna system 2R. It has the function of a cased array antenna system 2S. In this disclosure, individual arrays When distinguishing between the configurations of the element satellite 10 and the individual array element satellites 10, use "A" and A symbol such as "B" may be added.

[0017] (2-1) Array element satellite 10 The array element satellite 10 includes a receiving module 110, antennas 111 and 112, and a transmitting module. Signal module 120, antenna 121, antenna 122, control device 130, and attitude control The device is equipped with a 140.

[0018] Antenna 111 receives the transmission signal (radio waves) transmitted from transmitter 3. It generates a signal and outputs it to the receiving module 110. The receiving module 110 is a control unit. Under the control of 130, the output signal from antenna 111 is controlled by a predetermined signal described later. The signal is processed and the processed signal is output to antenna 112. Antenna 112 receives the signal. Based on the output signal from module 110, a transmit signal is sent toward the transmit / receive satellite 20. ru.

[0019] Antenna 121 receives the transmission signal (radio waves) transmitted from the transmitting / receiving satellite 20. The receiver generates a signal and outputs it to the transmitting module 120. The transmitting module 120 controls Under the control of device 130, predetermined signal processing is performed on the output signal from antenna 121. The signal processed is output to antenna 122. Antenna 122 transmits the module Based on the output signal from rule 120, a transmission signal is sent to receiver 4.

[0020] Antennas 111, 112, 121, and 122 are patch antennas and horns, respectively. Any configuration can be adopted, such as an antenna or dipole antenna, but multiple array element satellites 1 To achieve high gain as a phased array antenna formed by 0, directivity control is easier. Using a pyramidal shape (e.g., a patch antenna array or a slot antenna array) Desirable. At least a portion of antennas 111, 112, 121, and 122 is physically or It may be configured as a single functionally integrated antenna, and by a switch (not shown) The signal path of the receiving phased array antenna system 2R and the transmitting phased array The signal path of antenna system 2S may be configured to be switchable.

[0021] The control device 130 is a device that controls the operation of the entire array element satellite 10. Specifically, The control device 130 controls the attitude control device 140 to determine the position of the array element satellite 10. It controls the position and attitude. The control device 130 also controls the array element satellite 10 and other devices (for example) For example, communication with other array element satellites (10, transmitting / receiving satellites 20, other satellites 100, and ground stations, etc.) The control device 130 controls the signal. Furthermore, the control device 130 performs various signal processing and various information processing.

[0022] The control device 130 has one or more processors 131 (hereinafter simply referred to as "processor 131") (hereinafter referred to as "storage device 132") and one or more storage devices 132 (hereinafter simply referred to as "storage device 132") It includes. Processor 131 includes a CPU (Central Processing Unit), etc. The information processing is performed. The storage device 132 contains various information necessary for processing by the processor 131. The control program is stored in the memory device 132. A computer program executed by processor 131, processor 131 The functions of the control device 130 are realized through cooperation with the memory device 132. The data may be recorded on a computer-readable recording medium.

[0023] The attitude control device 140 is a mechanism for adjusting the position and attitude of the array element satellite 10. In the case of a very small array element satellite 10 performing formation flight, attitude control device 140 may include an electromagnet 141. The electromagnet 141 enables the adjacent satellite 100 The relative positions between elements can be adjusted using magnetic force, allowing control to maintain the desired array shape.

[0024] (2-2) Transmitting and receiving satellite 20 The transmitting and receiving satellite 20 includes a receiving module 210, an antenna 211, and a transmitting module 220. It includes an antenna 221, a control device 230, and an attitude control device 240.

[0025] Antenna 211 receives transmission signals from each of the multiple array element satellites 10. This generates a received signal and outputs it to the receiving module 210. 0 is when, under the control of the control device 230, the antenna 211 is connected to multiple array element satellites 10 A predetermined signal is given to the received signal that is generated by receiving the transmitted signal (radio wave) that is transmitted. Signal processing is performed. The content of the signal processing performed by the receiving module 210 is not particularly limited, For example, it may include demodulation processing corresponding to the modulation processing performed in transmitter 3, etc. When the cased array antenna system 2 relays communication between the transmitter 3 and the receiver 4, etc. The receiving module 210 outputs the signal-processed signal to the transmitting module 220. That's fine.

[0026] The transmitting module 220, under the control of the control device 230, performs a predetermined action in response to a predetermined signal. The signal processing is performed. The transmitting module 210 sends the processed signal to the antenna 221. The antenna 221 outputs based on the output signal from the transmitting module 220. The signal is transmitted to each of the multiple array element satellites 10.

[0027] Antennas 211 and 221 are a patch antenna, a horn antenna, and a dipo, respectively. Any configuration can be used, such as a single antenna, but a shape that allows for easy control of directivity (e.g., patch antenna) is preferred. Antenna arrays or slot antenna arrays may be used. Antenna 211, and The 221 may be configured as a single antenna that is physically or functionally integrated. A switch (not shown) controls the signal path and transmission path of the receiving phased array antenna system 2R. Even if the signal path of the credible phased array antenna system 2S is configured to be switchable good.

[0028] The control device 230 controls the transmitting and receiving satellites 20. Specifically, the control device 230 controls the attitude The position and attitude of the transmitting and receiving satellites 20 are controlled by controlling the control device 240. The control device 230 communicates with the transmitting and receiving satellite 20 and other devices (such as the array element satellite 10 and ground stations). It controls the communication. Furthermore, the control device 230 performs various signal processing and various information processing. .

[0029] The control device 230 has one or more processors 231 (hereinafter simply referred to as "processor 231"). (hereinafter referred to as "storage device 232") and one or more storage devices 232 (hereinafter simply referred to as "storage device 232") It includes. The processor 231 includes a CPU and performs various information processing. Storage device 2 32 stores various information necessary for processing by the processor 231. (Storage device 232) The control program is stored in this location. The control program is executed by the processor 231. This is a computer program that is performed through the cooperation of the processor 231 and the memory device 232. This realizes the function of the control device 230. The control program is computer-readable. It may be recorded on a suitable recording medium.

[0030] The attitude control device 240 is a mechanism for adjusting the position and attitude of the transmitting and receiving satellites 20. In the case of a very small transmitting and receiving satellite 20 performing formation flight, the attitude control device 240 is It may also include an electromagnet 241. This allows for precise adjustment of the relative position with respect to the array element satellite 10. It can be adjusted and assist in the overall formation of the array.

[0031] (3) Functions of Phased Array Antenna System 2 (3-1) Receiving Phased Array Antenna System 2R Figure 3 is a diagram illustrating the receiving phased array antenna system 2R. The credit phased array antenna system 2R is equipped with, for example, multiple array element satellites 10. The receiving module 110, antenna 111, and antenna 112, and the transmitting / receiving satellite 20 It includes a receiving module 210 and an antenna 211.

[0032] The antennas 111 of the multiple array element satellites 10 are arranged in an array, and phase A phased array antenna 11 is constructed. The directivity of the phased array antenna 11 is determined by each antenna. It is determined by the excitation weight of antenna 111. The excitation weight of each antenna 111 is determined by the receiving Determined by the signal processing of module 110. Control equipment provided by each array element satellite 10 The receiver module is configured such that the excitation weight of each antenna 111 is set to a desired value. The phase and amplitude of the signal at 110 are controlled. The desired values ​​are calculated by the control device 130. It may also be other devices (other array element satellite 10, transmitting / receiving satellite 20, other satellite 100, ground The data may be obtained from the above-mentioned devices, etc. The control device 130 may, for example, multiple array element satellites 1 The receiving module compensates for the phase difference of the received signals of each antenna 111 during the interval 0. The 110 may be controlled. The control device 130 controls the position of each of the multiple array element satellites 10. Not only the phase difference caused by the differences, but also the variation of the individual array element satellite 10 (A- To compensate for phase differences caused by information (including information measured before the launch of the element satellite 10, etc.) The control may be performed in this manner. This transmits the directivity of the phased array antenna 11. It becomes possible to control the direction of the signal device 3.

[0033] The antennas 112 of the multiple array element satellites 10 are arranged in an array, and phase A phased array antenna 12 is constructed. The directivity of the phased array antenna 12 is determined by each antenna. The excitation weight of each antenna 112 is determined by the excitation weight of the antenna 112. Determined by the signal processing of module 110. Control equipment provided by each array element satellite 10 The receiver module is configured such that the excitation weight of each antenna 112 is set to a desired value. The phase and amplitude of the signal at 110 are controlled. The desired values ​​are calculated by the control device 130. It may also be other devices (other array element satellite 10, transmitting / receiving satellite 20, other satellite 100, ground The data may be obtained from the above-mentioned devices, etc. The control device 130 may, for example, multiple array element satellites 1 The receiving module compensates for the phase difference of the received signals of each antenna 112 during the interval 0. The 110 may be controlled. The control device 130 controls the position of each of the multiple array element satellites 10. Not only the phase difference caused by the differences, but also the variation of the individual array element satellite 10 (A- To compensate for phase differences caused by information (including information measured before the launch of the element satellite 10, etc.) The control may be performed in this manner. This transmits the directivity of the phased array antenna 12. This makes it possible to control the direction of the receiving satellite 20.

[0034] The receiving module 110 consists of a receiving unit 113, a phase shifting unit 114, a modulation unit 115, and a reference frequency signal. It includes a signal generation unit 116 and a transmission unit 117. These functions are provided by the receiving module 110. The unit, under the control of the control device 130, energizes antenna 111 and antenna 112 respectively. The phase and amplitude of the signal in the receiving module 110 are adjusted so that the vibration weight becomes the desired value. To control.

[0035] The receiving unit 113 performs predetermined signal processing on the output signal from the antenna 111. Section 113 is composed of, for example, a low-noise amplifier and the output signal from antenna 111. Amplification may be performed.

[0036] The phase shift unit 114 performs phase shift processing to change the phase of the output signal from the receiving unit 113.

[0037] The phase shift unit 114, for example, performs phase shift processing, and the transmitter 3 and the phase shift unit 114 are included in the system. The phase of the signal may be changed, at least based on the distance between the element satellites 10. The phase shift unit 114 controls, for example, the distance between the transmitter 3 and each of the multiple array element satellites 10. The phase of the signal may be changed to compensate for the difference. This creates a phased array. The directivity of the antenna 11 can be controlled to point towards the transmitter 3.

[0038] The phase shift unit 114, for example, includes the transmitting and receiving satellite 20 and the phase shift unit 114 as a phase shift process. The phase of the signal may be changed based at least on the distance between the array element satellites 10. In particular, the phase shift unit 114, for example, controls each of the transmitting and receiving satellites 20 and the multiple array element satellites 10. The phase of the signal may be changed to compensate for the difference in distance between the two. Controlling the directivity of the symmetric array antenna 12 so that it points towards the transmitting and receiving satellites 20. This becomes possible.

[0039] Furthermore, the distance between the transmitter 3 and the array element satellite 10, and the array element satellite 10 and the transmitter / receiver. The distance between satellites 20 is relative to the distance between transmitter 3, array element satellite 10, and transmitting / receiving satellite 20. The calculation may be based on the relative positions of the array elements. The 10th star and the 20th transmitting / receiving satellite are equipped with ranging sensors, and the distance measured using the ranging sensors is used It may be. Alternatively, signals may be transmitted and received between the array element satellite 10 and the transmitting / receiving satellite 20. The relative positions between them may be estimated by measuring the intensity of the signals. Furthermore, in the calculation, the absolute position of the transmitter 3, the array element satellite 10, and the transmitting / receiving satellite 20 Information on placement may also be used. For example, the array element satellite 10 or the transmitting / receiving satellite 20 is a well known The method may be used to obtain information about its own position and orientation in the absolute coordinate system. The array element satellite 10, or the transmitting / receiving satellite 20, uses a camera to capture images of the sun, moon, Earth, or By imaging stars, it obtains information about its own position and orientation in an absolute coordinate system. That's fine.

[0040] The modulation unit 115 modulates the reference frequency signal generated by the reference frequency signal generation unit 116 into the phase shift unit 1 Modulation processing is performed using the output signal from 14. The reference frequency signal generation unit 116 is: For example, it may be configured as an oscillator circuit. Note that the array element satellite 10 may be connected to an external device ( Information (such as the value of the reference frequency) for generating a reference frequency signal is obtained from other satellites (e.g., 100 satellites). Even if the reference frequency signal generation unit 116 generates a reference frequency signal based on the information, Good. The modulation method is not particularly limited, and for example, amplitude modulation, frequency modulation, and phase modulation. It may also be adjusted. Furthermore, as will be described later, each of the multiple array element satellites 10 has each The transmission signal (radio waves) is emitted from antenna 112. The emitted transmission signal is then transmitted into the air. The amplitudes are combined so that they are summed together, and the transmitting / receiving satellite 20 receives the combined transmitted signal. Therefore, if the modulation processing performed by the modulation unit 115 is amplitude modulation, The amplitude information of the signal on which baseband information (output signal from phase shift unit 114) is superimposed, This makes it possible to transmit the signal, synthesized in space, to the transmitting / receiving satellite 20 more efficiently. The reference frequency signal generated by the reference frequency signal generation unit 116 is transmitted from the transmitter 3. A frequency that is sufficiently higher than the reference frequency of the transmitted signal (at least twice as high, for example, several to tens of times higher). It is preferable that it be a wave number.

[0041] The transmitting unit 117 is composed of a power amplifier and the like, and amplifies the output signal from the modulation unit 115. The signal is then output to antenna 112. The transmitting unit 117 receives the output signal from the modulation unit 115. The reference frequency signal generated by the reference frequency signal generation unit 116 is superimposed on the antenna 112. It may be output. The superimposed reference frequency signal is provided by the receiving module of the transmitting / receiving satellite 20. It may also be used in the demodulation process by the demodulation unit 213 of 210.

[0042] Antenna 112 radiates a transmission signal as radio waves based on the output signal from the transmitter 117. The transmission signals (electrical signals) are radiated from each antenna 112 of the multiple array element satellite 10. The waves are combined in space and transmitted and received based on the directivity of the phased array antenna 12. It will spread towards star level 20.

[0043] Furthermore, the transmitting unit 117 applies a phased array to the output signal from the modulation unit 115. Signal processing may be performed to direct the directionality of Tena 12 toward the transmitting / receiving satellite 20. Transmitter 11 7 is, for example, the transmitting and receiving satellite 20 and the array elements provided by each of the multiple array element satellites 10. The phase of the output signal from the modulation unit 115 is changed to compensate for the difference in distance between it and satellite 10. It may be done. Also, the transmitting unit 117 may, for example, connect the transmitting and receiving satellite 20 and a plurality of array element satellites. Modulation unit 1 compensates for the difference in distance between each of the 10 stars and the array element satellite 10. A time delay may be applied to the output signal from 15.

[0044] The antenna 211 of the transmitting / receiving satellite 20 is connected to each antenna 1 of the multiple array element satellites 10. It receives the transmitted signal (radio wave) that is sent from 12 and synthesized in space.

[0045] The receiving module 210 includes a receiving unit 212 and a demodulation unit 213, and receives signals from the antenna 211. The output signal is subjected to predetermined signal processing.

[0046] The receiving unit 212 performs predetermined signal processing on the output signal from the antenna 211. Section 212 is composed of, for example, a low-noise amplifier and the output signal from antenna 211. Amplification may be performed.

[0047] The demodulation unit 213 modulates the output signal from the receiving unit 212 with respect to the modulation section of the array element satellite 10. Demodulation processing corresponding to the modulation processing (amplitude modulation, frequency modulation, and phase modulation, etc.) performed in 115 The demodulation unit 213 performs the following operations. For example, from the output signal from the receiving unit 212, the array element satellite The reference frequency signal superimposed by the transmitting unit 117 of the receiving module 110 of unit 10 is extracted After outputting, the reference frequency signal may be used for demodulation processing. Alternatively, the transmitting / receiving satellite 20 Information for generating a reference frequency signal from an external device (such as another satellite 100) (reference frequency The demodulation unit 213 obtains numerical values, etc., and generates a reference frequency signal based on that information. The reference frequency signal may then be used for demodulation.

[0048] The receiving module 210 processes the signal generated by the demodulation process performed by the demodulation unit 213. Furthermore, predetermined signal processing may be performed. This signal processing may be performed, for example, on the ground at transmitter 3. This may include demodulation processing corresponding to the modulation processing. This allows for the desired baseband information to be obtained. It becomes possible to retrieve the information. In addition, the receiving module 210 is a demodulator 213. The signal generated by the adjustment process is provided by the transmission phased array antenna system 2S. The output may also be sent to the transmission module 220.

[0049] In the receiving phased array antenna system 2R, multiple array element satellites 10 The modulation unit 115 performs modulation processing to superimpose a reference frequency signal onto the received signal. Therefore, the reference frequency of the signal received by the phased array antenna 11 from the transmitter 3 The signal and the reference frequency signal that the phased array antenna 12 transmits to the transmitting and receiving satellite 20. This will result in a difference between the number and the transmitted signal of multiple array element satellites 10. Having different frequency bands makes it possible to prevent signal interference within the system. ru.

[0050] (3-2) Transmitting Phased Array Antenna System 2S Figure 4 is a diagram illustrating the transmitting phased array antenna system 2S. The reliable phased array antenna system 2S includes, for example, the transmitting and receiving satellite 20 equipped with a transmission module The Joule 220, antenna 212, and the transmission module of the multiple array element satellite 10 It comprises 120, antenna 121, and antenna 122.

[0051] The transmitting module 220 of the transmitting / receiving satellite 20 includes a modulation unit 222 and a reference frequency signal generator. It comprises a section 223 and a transmission section 224.

[0052] The modulation unit 222 modulates the reference frequency signal generated by the reference frequency signal generation unit 223 to a predetermined signal Modulation processing is performed according to the baseband information. Reference frequency signal generation unit 223 This may be configured, for example, as an oscillator circuit. Note that the transmitting / receiving satellite 20 may be connected to an external device ( Information (such as the value of the reference frequency) for generating a reference frequency signal is obtained from other satellites (e.g., 100 satellites). Even if the reference frequency signal generation unit 223 generates a reference frequency signal based on the information, Good. The modulation method is not particularly limited, and for example, amplitude modulation, frequency modulation, and phase modulation. It may be adjusted. The reference frequency signal generated by the reference frequency signal generation unit 223 is a predetermined signal. The frequency is significantly higher than the reference frequency of the baseband information (for example, twice, or several to tens of times higher). It is desirable that the frequency be (to a certain degree).

[0053] A predetermined signal as baseband information that is subject to modulation processing by the modulation unit 222 is, for example, For example, from the receiving module 210 of the receiving phased array antenna system 2R This may be the output signal of the control device 230, or any signal generated by the control device 230. Furthermore, the specified signal is modified by the baseband information of the reference frequency signal for ground transmission. It may be a tuned signal. The reference frequency signal generated by the reference frequency signal generation unit 223 is A frequency that is sufficiently higher than the reference frequency of the specified signal (for example, twice, or several to several tens of times higher). It is preferable that it be a wave number.

[0054] The transmitting unit 224 is composed of a power amplifier and the like, and amplifies the output signal from the modulation unit 222. The signal is then output to antenna 221. The transmitting unit 224 receives the output signal from the modulation unit 222. The reference frequency signal generated by the reference frequency signal generation unit 223 is superimposed on the antenna 221. It may be output. The superimposed reference frequency signal is transmitted via the transmission module of the array element satellite 10. It may also be used for demodulation processing by the demodulation unit 124 of the rod 120.

[0055] Antenna 221 radiates a transmission signal as radio waves based on the output signal from the transmitter 224. The transmitted signal (radio waves) radiated from antenna 221 is based on the directivity of antenna 221. Next, it propagates towards multiple array element satellites 10.

[0056] The antennas 121 of the multiple array element satellites 10 are arranged in an array, and phase A phased array antenna 13 is constructed. The directivity of the phased array antenna 13 is determined by each antenna. It is determined by the excitation weight of antenna 121. The excitation weight of each antenna 121 is determined by the transmission Determined by the signal processing of module 120. Control equipment provided by each array element satellite 10 The device 130 is configured such that the excitation weight of each antenna 121 is set to the desired value, and the transmitting module The phase and amplitude of the signal at 120 are controlled. The desired values ​​are calculated by the control device 130. It may also be other devices (other array element satellite 10, transmitting / receiving satellite 20, other satellite 100, ground The data may be obtained from the above-mentioned devices, etc. The control device 130 may, for example, multiple array element satellites 1 The transmitting module compensates for the phase difference of the received signals of each antenna 121 during the interval 0. The 120 may be controlled. This allows the directivity of the phased array antenna 13 to be transmitted. It will be possible to control the direction of satellite 20.

[0057] The antennas 122 of the multiple array element satellites 10 are arranged in an array and phase A phased array antenna 14 is constructed. The directivity of the phased array antenna 14 is determined by each antenna. This is determined by the excitation weight of antenna 122. The excitation weight of each antenna 122 is determined by the transmission Determined by the signal processing of module 120. Control equipment provided by each array element satellite 10 The device 130 is configured so that the excitation weight of each antenna 122 is set to the desired value, and the transmitting module The phase and amplitude of the signal at 120 are controlled. The desired values ​​are calculated by the control device 130. Alternatively, other devices (other array element satellite 10, transmitting / receiving satellite 20, other satellite 1) may be used. 00, may be obtained from ground equipment, etc. The control device 130 may, for example, multiple array elements To compensate for the phase difference of the transmitted signals of each antenna 122 among the sub-satellites 10, Module 120 may be controlled. This will control the directionality of the phased array antenna 14. This makes it possible to control the direction of the receiver 4.

[0058] The transmitting module 120 includes a receiving unit 123, a demodulation unit 124, a phase shift unit 125, and a transmitting unit 1 It includes 26. These functional parts of the transmission module 120 are controlled by the control device 130. Please ensure that the excitation weights for antenna 121 and antenna 122 are set to the desired values. In addition, the phase and amplitude of the signal in the transmitting module 120 are controlled.

[0059] The receiving unit 123 performs predetermined signal processing on the output signal from the antenna 121. Section 123 is composed of, for example, a low-noise amplifier and the output signal from antenna 121. Amplification may be performed.

[0060] The demodulation unit 124 modulates the output signal from the receiving unit 123 with respect to the modulation unit 22 of the transmitting / receiving satellite 20. The demodulation process corresponding to the modulation process (amplitude modulation, frequency modulation, and phase modulation, etc.) performed in step 2 is performed The demodulation unit 124, for example, receives the output signal from the receiving unit 123 and the transmitting / receiving satellite 20. The reference frequency signal superimposed by the transmitting unit 224 of the transmitting module 220 is extracted. The reference frequency signal may then be used for demodulation processing. Alternatively, the array element satellite 10 may be external Information for generating a reference frequency signal from the equipment in the section (other satellites 100, etc.) (reference frequency The demodulation unit 124 acquires values, etc., and generates a reference frequency signal based on that information, The reference frequency signal may be used for demodulation.

[0061] The phase shift unit 125 performs phase shift processing to change the phase of the output signal from the demodulation unit 124.

[0062] The phase shift unit 125 performs, for example, phase shift processing between the transmitting / receiving satellite 20 and the array element satellite 10. The phase of the signal may be changed, at least based on the distance between them. In particular, the phase shift unit 125 For example, the difference in distance between the transmitting / receiving satellite 20 and each of the multiple array element satellites 10 is compensated. The phase of the signal may be changed accordingly. This allows the phased array antenna 1 The directivity of 3 can be controlled to point towards the transmitting and receiving satellite 20.

[0063] The phase shift unit 125 performs, for example, a phase shift process that adjusts the distance between the receiver 4 and the array element satellite 10. The phase of the signal may be changed based at least on the separation. In particular, the phase shift unit 125 may, for example Then, to compensate for the difference in distance between the receiver 4 and each of the multiple array element satellites 10, The phase of the signal may be changed. This changes the directivity of the phased array antenna 14. This makes it possible to control the device so that it faces the direction of receiver 4.

[0064] Furthermore, the distance between the receiver 4 and the array element satellite 10, and the distance between the array element satellite 10 and the transmitter / receiver. The distance between satellites 20 is relative to the distance between receiver 4, array element satellite 10, and transmitting / receiving satellite 20. The calculation may be based on the relative positions of the array elements. The 10th star and the 20th transmitting / receiving satellite are equipped with ranging sensors, and the distance measured using the ranging sensors is used It may be. Alternatively, signals may be transmitted and received between the array element satellite 10 and the transmitting / receiving satellite 20. The relative positions between them may be estimated by measuring the intensity of the signals. Furthermore, in the calculation, the absolute position of the receiver 4, the array element satellite 10, and the transmitting / receiving satellite 20 Information on placement may also be used. For example, the array element satellite 10 or the transmitting / receiving satellite 20 is a well known The method may be used to obtain information about its own position and orientation in the absolute coordinate system. The array element satellite 10, or the transmitting / receiving satellite 20, uses a camera to capture images of the sun, moon, Earth, or By imaging stars, it obtains information about its own position and orientation in an absolute coordinate system. That's fine.

[0065] The transmitting unit 126 is composed of a power amplifier and the like, and amplifies the output signal from the phase shift unit 125. Then, output to antenna 122.

[0066] Antenna 122 radiates a transmission signal as radio waves based on the output signal from the transmitter 126. The transmission signals (electrical signals) are radiated from each antenna 122 of the multiple array element satellite 10. The waves are combined in space and, based on the directivity of the phased array antenna 14, are sent to the receiver 4. It propagates in that direction.

[0067] In the transmitting phased array antenna system 2S, the modulation section 2 of the transmitting and receiving satellite 20 The reference frequency signal to be transmitted is modulated by 22, and then multiple array element satellites 10 Demodulation processing is performed in the demodulation unit 124. Therefore, the phased array antenna 13 The reference frequency signal of the signal received from the transmitting / receiving satellite 20 and the phased array antenna 14 This results in a difference between the reference frequency signal that is transmitted to receiver 4 and the signal that is transmitted to receiver 4. The received signal and transmitted signal of the array element satellite 10 have different frequency bands, which allows the system to... This makes it possible to prevent signal interference within the system.

[0068] (4) Variations (4-1) First variation Figure 5 is a diagram illustrating a first modified example of the phased array antenna system 2. In this modified example, the phased array antenna system 2 newly incorporates the third satellite 30. To prepare. The third satellite 30 is equipped with satellite 100 which is equipped with the phased array antenna system 2. It can be slightly off.

[0069] The third satellite 30 includes an antenna 31 and a reference frequency signal generation unit 32.

[0070] The reference frequency signal generation unit 32 is a reference frequency signal generation unit 11 provided by the array element satellite 10. 6 may be substituted. That is, the reference frequency signal generation unit 32 changes the array element satellite 10. It has the function of generating a reference frequency signal used for modulation processing by the tuning unit 115. Star 30 receives the reference frequency signal generated by the reference frequency signal generation unit 32 via the antenna 31. The data may be transmitted to the array element satellite 10. Any antenna of the array element satellite 10 is a third It is possible to receive a reference frequency signal from satellite 30. The array element satellite 10 is equipped The modulation unit 115 of the transmitting module 120 modulates the received reference frequency signal with the phase shift unit 114 The output signal from the satellite may be modulated and output to the transmitter 117. 0 does not necessarily have to include the modulation unit 115.

[0071] The reference frequency signal generation unit 32 uses the reference frequency signal generation unit 223 provided by the transmitting / receiving satellite 20. It may be replaced. That is, the reference frequency signal generation unit 32 is the modulation unit 22 of the transmitting / receiving satellite 20. It has the function of generating a reference frequency signal used for modulation processing by 2. The third satellite 30 is The reference frequency signal generated by the reference frequency signal generation unit 32 is transmitted and received via the antenna 31. It may also transmit to satellite 20. Any antenna on the transmitting / receiving satellite 20 receives the base from the third satellite 30. It is possible to receive sub-frequency signals. Transmitting module 22 of the transmitting / receiving satellite 20 The modulation unit 222 of 0 modulates the received reference frequency signal by a predetermined signal as a modulation process. The signal may be modulated and output to the transmitting unit 224. The transmitting / receiving satellite 20 is equipped with a modulation unit 222. It's not necessary.

[0072] According to this modified version, the third satellite 30 generates a reference frequency signal, and the array element satellite 10 and transmission By providing this to the receiving satellite 20, the need for a reference frequency signal generation unit in each satellite is reduced. This allows for a simplification of the satellite's design and a reduction in energy consumption. This becomes possible. Furthermore, by centralizing the generation of the reference frequency signal, phased array antennas can be used. This can improve the overall signal accuracy and synchronization accuracy of the entire system 2.

[0073] (4-2) Second variation Figure 6 is a diagram illustrating a second modified example of the phased array antenna system 2. In this modified example, radio waves are used to transmit signals from multiple array element satellites 10 to the transmitting / receiving satellite 20. It does not use light, but rather light (visible light or laser).

[0074] In the modified phased array antenna system 2, the array element satellite 10 is conventional Instead of the antenna 112, the light-emitting unit 151 (such as a LiFi LED or laser diode) This allows the array element satellite 10 to use optical signals to transmit and receive satellite 20. Information can be transmitted. The transmitting / receiving satellite 20 is equipped with a light receiving unit 251 instead of an antenna 211. This allows for accurate reception of optical signals from the array element satellite 10.

[0075] Furthermore, in this modified example, the transmitting and receiving satellite 20 also has a light-emitting unit 261 (L) instead of an antenna 221. It can be equipped with iFi LEDs, laser diodes, etc. This allows for the transmission and reception of satellites. 20 can transmit data to the array element satellite 10 using optical signals. The 10-star model, by having a light-receiving unit 152 instead of antenna 121, receives signals from the transmitting and receiving satellites 20. It receives an optical signal.

[0076] In this modified version, optical communication is employed to control the signal of the phased array antenna system 2. The transmission and reception of data will be faster. Optical signals have higher frequencies compared to radio waves, and more data can be transmitted. Because it can transmit data, it becomes possible to significantly improve the overall communication capacity of the system. Furthermore, by utilizing highly directional laser communication, unwanted interference that occurs in radio communication can be reduced. This enables more stable data transmission.

[0077] Thus, this modified example utilizes optical communication technology to achieve higher speeds compared to conventional radio communication. This makes it possible to provide a communication environment with less interference.

[0078] (4-3) Third variation Figure 7 is a diagram illustrating a third modified example of the phased array antenna system 2. In this modified example, the receiving module 210 of the array element satellite 10 is connected to the antenna 11 1. The device is configured to include multiple sets of receiving units 113 and phase shifting units 114.

[0079] In this modified example, the receiving module 210 is added after each set and before the modulation unit 115. It is equipped with a calculation unit 118. As a result, the transmission signal transmitted from the transmitter 3 is sent to multiple antennas The signal is received by each of the 111 units and then received by the subsequent receiving unit 113 and phase shift unit 114, respectively. Processing is performed. The output signals from each set are added together by the adder 118 and then modified. Output is sent to the adjustment unit 115.

[0080] This configuration allows the transmission signals from the transmitter 3 to be transmitted within a single array element satellite 10. This enables amplification of the signal in the phased array antenna system 2. This makes it possible to reduce the number of element satellites 10. In the conventional configuration, each array element satellite 1 In the previous case, each unit processed the transmitted signal individually, but in this modified example, multiple received signals are added together by the summing unit 118. By integrating the signals, signal strength will be improved and reception processing will become more efficient.

[0081] Furthermore, the phase of the received signal is appropriately adjusted by the signal integration by the summing unit 118. The signal is input to the modulation unit 115 in this state. This improves the efficiency of transmission and reception, and the quality of communication. This is expected. This modification allows for a phased array with fewer array elements in satellite 10. This makes it possible to maintain the functionality of Tena System 2, resulting in overall system cost reduction and improved operational efficiency. This will lead to an improvement in the rate.

[0082] (4-4) Others In the embodiment described above, the phased array antenna system 2 is an example of an aircraft It consisted of 100 satellites. However, the phased array antenna system Stem 2 is not limited to satellite 100 flying in outer space, but can also apply to any flying object flying within the atmosphere. It may consist of (airplanes, drones, etc.).

[0083] The embodiments described above are provided to facilitate understanding of the present invention and do not limit the present invention. It is not intended to be interpreted as such. Each element of the embodiment, as well as its arrangement, materials, and conditions. The shape and size are not limited to those exemplified and can be changed as appropriate. Furthermore, the configurations shown in different embodiments can be partially substituted or combined. It is Noh.

[0084] (Note 1) A transmission phased system comprising multiple first aircraft arranged in an array and a second aircraft. It is an array antenna system, The second flying object is A modulation means that performs modulation processing to modulate a reference frequency signal with a predetermined signal, Based on the output from the modulation means, the first transmission signal is transmitted to each of the plurality of first aircraft. It comprises a first transmission means that outputs to an aircraft, Each of the plurality of first flying bodies is A first receiving means for receiving the first transmission signal transmitted from the second flying object, The first received signal generated based on the reception of the first transmitted signal by the first receiving means A demodulation means that performs demodulation processing corresponding to the modulation process, The phase of the output from the demodulation means is determined by the distance between the second aircraft and the first aircraft. A phase shifting means that changes based at least on the distance between the first flying object and the receiver, Based on the output from the phase shift means, a second transmission signal is output toward the receiver. 2. A transmission means, A phased array antenna system for transmission. (Note 2) The modulation means, as part of the modulation process, modulates the reference frequency signal using the predetermined signal. Amplitude modulation, The phased array antenna system for transmission described in Appendix 1. (Note 3) The second flying object further comprises a reference frequency signal generation means for generating the reference frequency signal. El, The phased array antenna system for transmission described in Appendix 1. (Note 4) The second aircraft further comprises a second receiving means for receiving the reference frequency signal. , The phased array antenna system for transmission described in Appendix 1. (Note 5) The aforementioned transmitting phased array antenna system further comprises a third flying object, The third flying object includes a reference frequency signal generating means for generating the reference frequency signal. , The phased array antenna system for transmission described in Appendix 4. (Note 6) The aforementioned first transmission signal is a radio wave, The first transmitting means is a transmitting antenna unit that transmits the first transmission signal, which is a radio wave. , The first receiving means is a receiving antenna unit that receives the first transmission signal, which is a radio wave. , The phased array antenna system for transmission described in Appendix 1. (Note 7) The aforementioned first transmission signal is an optical signal, The first transmitting means is a light-emitting unit that emits the first transmitting signal, which is an optical signal. The first receiving means is a light receiving unit that receives the first transmission signal, which is an optical signal. The phased array antenna system for transmission described in Appendix 1. (Note 8) Multiple first-flying antennas arranged in an array form are provided in the transmitting phased array antenna system. The first flying body that constitutes the aircraft, The second flying object of the aforementioned transmitting phased array antenna system is A modulation means that performs modulation processing to modulate a reference frequency signal with a predetermined signal, Based on the output from the modulation means, the first transmission signal is transmitted to each of the plurality of first aircraft. It comprises a first transmission means that outputs to an aircraft, Each of the plurality of first flying bodies is A first receiving means for receiving the first transmission signal transmitted from the second flying object, The first received signal generated based on the reception of the first transmitted signal by the first receiving means A demodulation means that performs demodulation processing corresponding to the modulation process, The phase of the output from the demodulation means is determined by the distance between the second aircraft and the first aircraft. , the distance between the first flying object and the receiver, and a phase shifting means that changes based on at least the distance between the first flying object and the receiver, Based on the output from the phase shift means, a second transmission signal is output toward the receiver. 2. A transmission means, 1st flight vehicle. (Note 9) A second flying object equipped with a transmitting phased array antenna system, The second flying object is A modulation means that performs modulation processing to modulate a reference frequency signal with a predetermined signal, Based on the output from the modulation means, the first transmission signal is transmitted to the transmission phased array. A first transmission means that outputs to each of the multiple first aircraft equipped in the antenna system. And, equipped with, Each of the plurality of first flying bodies is A first receiving means for receiving the first transmission signal transmitted from the second flying object, The first received signal generated based on the reception of the first transmitted signal by the first receiving means A demodulation means that performs demodulation processing corresponding to the modulation process, The phase of the output from the demodulation means is determined by the distance between the second aircraft and the first aircraft. A phase shifting means that changes based at least on the distance between the first flying object and the receiver, Based on the output from the phase shift means, a second transmission signal is output toward the receiver. 2. A transmission means, 2nd flight vehicle. [Explanation of Symbols]

[0085] 1... Satellite communication system, 2... Phased array antenna system, 2R... Receiving phase Phased array antenna system, 2S...for transmission Phased array antenna system, 3...for transmission Unit, 4...receiver, 10...array element satellite, 20...transmitting satellite, 100...satellite, 110...receiver Signal module, 111… Antenna, 112… Antenna, 120… Transmitter module, 121 ...Antenna, 122...Antenna, 130...Control device, 131...Processor, 132...Memory Device, 140...Attitude control device, 141...Electromagnet, 210...Receiving module, 211...An Tena, 220...transmitting module, 221...antenna, 230...control device, 231...process Ssa, 232...memory device, 240...attitude control device, 241...electromagnet, 31...antenna, 3 2...Reference frequency signal generation unit, 30...Third satellite, 151...Light transmission unit, 152...Light receiving unit, 251 ...light receiving unit, 261...light emitting unit, 113...receiving unit, 114...phase shifting unit, 115...modulation unit, 116 ...Reference frequency signal generation unit, 117...Transmission unit, 123...Receiver unit, 124...Demodulation unit, 125... Phase shift unit, 126... Transmitting unit, 212... Receiving unit, 213... Demodulation unit, 222... Modulation unit, 223... Reference frequency signal generation unit, 224...transmission unit

Claims

1. A transmission phased system comprising multiple first aircraft arranged in an array and a second aircraft. It is an array antenna system, The second flying object is A modulation means that performs modulation processing to modulate a reference frequency signal with a predetermined signal, Based on the output from the modulation means, the first transmission signal is transmitted to each of the plurality of first flying bodies. It comprises a first transmission means that outputs to an aircraft, Each of the plurality of first flying bodies is A first receiving means for receiving the first transmission signal transmitted from the second flying object, The first received signal generated based on the reception of the first transmitted signal by the first receiving means A demodulation means that performs demodulation processing corresponding to the modulation process, The phase of the output from the demodulation means is determined by the distance between the second aircraft and the first aircraft. A phase shifting means that changes based at least on the distance between the first flying object and the receiver, Based on the output from the phase shifting means, a second transmission signal is output toward the receiver.

2. A transmitting means, A phased array antenna system for transmission.

2. The modulation means, as part of the modulation process, modulates the reference frequency signal using the predetermined signal. Amplitude modulation, A transmitting phased array antenna system according to claim 1.

3. The second flying object further comprises a reference frequency signal generation means for generating the reference frequency signal. El, A transmitting phased array antenna system according to claim 1.

4. The second aircraft further comprises a second receiving means for receiving the reference frequency signal. 、 A transmitting phased array antenna system according to claim 1.

5. The aforementioned transmitting phased array antenna system further comprises a third flying object, The third flying object comprises a reference frequency signal generating means for generating the reference frequency signal. 、 The transmitting phased array antenna system according to claim 4.

6. The aforementioned first transmission signal is a radio wave, The first transmitting means is a transmitting antenna unit that transmits the first transmission signal, which is a radio wave. 、 The first receiving means is a receiving antenna unit that receives the first transmission signal, which is a radio wave. 、 A transmitting phased array antenna system according to claim 1.

7. The first transmission signal is an optical signal, The first transmitting means is a light-emitting unit that emits the first transmitting signal, which is an optical signal. The first receiving means is a light receiving unit that receives the first transmission signal, which is an optical signal. A transmitting phased array antenna system according to claim 1.

8. Multiple first-flying antennas arranged in an array form are provided in the transmitting phased array antenna system. The first flying body that constitutes the aircraft, The second flying object included in the aforementioned transmitting phased array antenna system is A modulation means that performs modulation processing to modulate a reference frequency signal with a predetermined signal, Based on the output from the modulation means, the first transmission signal is transmitted to each of the plurality of first flying bodies. It comprises a first transmission means that outputs to an aircraft, Each of the plurality of first flying bodies is A first receiving means for receiving the first transmission signal transmitted from the second flying object, The first received signal generated based on the reception of the first transmitted signal by the first receiving means A demodulation means that performs demodulation processing corresponding to the modulation process, The phase of the output from the demodulation means is determined by the distance between the second aircraft and the first aircraft. , a phase shifting means that changes based at least on the distance between the first flying object and the receiver, Based on the output from the phase shifting means, a second transmission signal is output toward the receiver.

2. A transmitting means, The first flying object.

9. A second flying object equipped with a transmitting phased array antenna system, The second flying object is A modulation means that performs modulation processing to modulate a reference frequency signal with a predetermined signal, Based on the output from the modulation means, the first transmission signal is transmitted to the transmission phased array. A first transmission means that outputs to each of the multiple first aircraft equipped in the antenna system. And, equipped with, Each of the plurality of first flying bodies is A first receiving means for receiving the first transmission signal transmitted from the second flying object, The first received signal generated based on the reception of the first transmitted signal by the first receiving means A demodulation means that performs demodulation processing corresponding to the modulation process, The phase of the output from the demodulation means is determined by the distance between the second aircraft and the first aircraft. A phase shifting means that changes based at least on the distance between the first flying object and the receiver, Based on the output from the phase shifting means, a second transmission signal is output toward the receiver.

2. A transmitting means, Second flying vehicle.

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