JP3597103B2 - Disturbance suppression beam directional antenna for satellite - Google Patents

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a satellite-borne disturbance suppression beam directing antenna that employs an array antenna for controlling the phase and the like, and in particular, arranges an element antenna on the surface of a conformal-shaped structure, and controls the conformal-shaped structure within a limited range. The present invention relates to a satellite-borne disturbance suppression beam-directional antenna that performs electronic beam scanning by an array antenna after being driven.
[0002]
[Prior art]
Conventional satellites use mechanically driven antennas for communication because they have relatively low resolution (or low resolution). However, in missions that require a resolution of 5 m or less, disturbances that occur during mechanical driving It was difficult to mount images with distortion. For this reason, when a mechanically driven antenna is mounted, inter-satellite communication has to be abandoned and the transmission capability has to be relatively suppressed to use direct transmission with a ground station.
[0003]
A plurality of element antennas are connected, and a phase shifter is connected to each of these element antennas to control the excitation phase of each element antenna, so that the beam scanning range of an array antenna that directs a beam in an arbitrary direction is narrow, so that it is wide. Many array antennas are required to cover the service area. In such a case, using only the array antenna is not appropriate for mounting on a satellite.
[0004]
An array antenna is known which combines the electronic scanning of the above-described array antenna with mechanical scanning.
[0005]
As an example of such an array antenna, there is a “phased array antenna device” described in JP-A-10-190337. This publication discloses that scanning is performed by a combination of mechanical scanning by rotation of a tubular structure and electronic scanning by a phased array antenna arranged on the tubular structure.
[0006]
In the case of the terrestrial observation technology satellite, if the above-described mechanical scanning is performed using a mechanically driven antenna for a resolution of 2 m or less, image disturbance during communication may occur due to vibration during driving. . LANDSAT in the United States initially equipped with a similar mechanically driven antenna for inter-satellite communication, but is currently used only for direct transmission to ground stations because image disturbances occur during communication. The same applies to fields such as reconnaissance satellites and information gathering satellites, and the use of mechanically driven antennas for onboard satellites is a major obstacle in terms of effective use of acquired data.
[0007]
However, the inter-satellite communication has a merit that a communication time more than 100 times as long as the direct transmission with the ground station can be ensured and the immediacy can be achieved. Therefore, the realization of the inter-satellite communication is expected.
[0008]
[Problems to be solved by the invention]
In the above-mentioned conventional mechanical drive antenna, disturbance such as vibration in mechanical drive (mechanical drive) causes disturbance of images during communication. An object of the present invention is to perform mechanical driving, and to suppress disturbance while using it in combination with electronic scanning.
[0010]
[Means for Solving the Problems]
The invention according to claim 1 of the present invention is formed by mounting a one-axis mechanical drive mechanism for setting a beam main axis direction that limits a beam scanning range, and mounting an element antenna on each surface of a conformal structure. And an array antenna, a transmission module for power-amplifying and transmitting a communication signal and a switch matrix for switching and connecting the array antenna, and a transmitter including the transmission module, and rotating the mechanical drive mechanism. Suppress disturbance caused by mechanical drive by fixing in the beam main axis direction, stop and start the operation of the element antenna mounted on one and the other of the adjacent surfaces among the surfaces one after another. , by performing the surface switching from one of said surfaces adjacent to the other, the phase with connecting switches the array antenna Characterized by direction control the beam control to the communication partner.
[0011]
Further, the sub-array to the invention according to claim 2 of the invention is formed by mounting a mechanical drive mechanism for rotating in a limited range around a single, on each side of the co informal shaped structure element antenna An array antenna comprising an antenna, a switch matrix for switching and connecting an input communication signal to output to the array antenna, a transmitter for supplying the communication signal to the switch matrix, and a drive control for driving and controlling the mechanical drive mechanism A controller for calculating a signal and a connection control signal for switching and connecting the switch matrix, and a controller for calculating a phase control signal for controlling the phase of the element antenna, and rotating the mechanical drive mechanism by the drive control signal to communicate with a communication partner. The beam main axis direction, which limits the beam scanning range in the direction, is fixed, and the connection control signal Connect switched switch matrix, by performing successively the stop and start of operation of the antenna elements are mounted on one and the other of said surfaces adjacent among the surface, from one to the other of said surfaces adjacent deeds plane switching, characterized in that control the phase of the antenna element by the phase control signal.
[0012]
Further, the invention according to the third aspect of the invention, the sub-array antenna of claim 2, wherein configured to include a sub-sub-array antennas, the sub-sub-array antenna configured to include a an array antenna module distributor, The array antenna module includes the element antenna and a phase shifter.
[0013]
Further, the invention according to claim 4 of the present invention comprises a mechanical drive mechanism that rotates in a limited range around one axis, and a subarray antenna formed by mounting an element antenna on the surface of a conformal structure. An array antenna, a switch matrix that switches and connects input communication signals and outputs the communication signals to the array antenna, a transmitter that supplies the communication signals to the switch matrix, a drive control signal that drives and controls the mechanical drive mechanism, and A controller for calculating a connection control signal for switching and connecting a switch matrix and a phase control signal for controlling the phase of the element antenna, and rotating the mechanical drive mechanism by the drive control signal to thereby emit a beam in the direction of a communication partner. The main axis direction of the beam, which limits the scanning range, is fixed, and the switch And connection switching matrix supplying the communication signal output from the transmitter to the array antenna performs beam scanning by controlling the phase of said element antennas by the phase control signal, the sub-array antenna, said elements a plurality of support constituted by blanking subarray antenna, the transmitter, and the power amplifying the communication signal, the transmission module of the number equal to the number of the sub-sub-array antenna comprising a phase shifter connected antenna and to the antenna elements And the connection between the transmission module and the sub-sub-array antenna is switched to prevent instantaneous interruption of communication.
[0014]
Further, the invention according to claim 5 of the present invention is characterized in that an arbitrary number of the sub-array antennas according to claim 2 are operated to form a beam.
[0015]
Furthermore, the invention according to claim 6 of the present invention is the input terminal and the output terminal of the switch matrix according to claim 2 , wherein the number of the input terminals is smaller than the number of the output terminals, and It is characterized in that the number is reduced.
[0016]
Further, the invention according to claim 7 of the present invention comprises a mechanical drive mechanism that rotates in a limited range around one axis, and a sub-array antenna formed by mounting an element antenna on the surface of a conformal structure. An array antenna, a switch matrix that switches and connects input communication signals and outputs the communication signals to the array antenna, a transmitter that supplies the communication signals to the switch matrix, a drive control signal that drives and controls the mechanical drive mechanism, and A controller for calculating a connection control signal for switching and connecting a switch matrix and a phase control signal for controlling the phase of the element antenna,
Forming a sub-sub-array antenna including the element antenna and a phase shifter connected to the element antenna and a distributor connected to the phase shifter, configuring the sub-array antenna including a plurality of the sub-sub-array antennas,
The drive control signal rotates the mechanical drive mechanism to fix the beam main axis direction that limits the beam scanning range in the direction of the communication partner, and switches and connects the switch matrix by the connection control signal to connect the array antenna to the array antenna. Supplying the communication signal output from the transmitter, performing beam scanning by controlling the phase of the element antenna by the phase control signal, the number of input terminals of the switch matrix, power amplifying the communication signal, equal to the product of the number and the number of the transmitter of the transmission modules included on a single said transmitter, the number of output terminals of the switch matrix includes a number of pre-hexa Bed subarray antenna and the number of the sub-array antenna It is characterized by being equal to the product of
[0017]
Further, the invention according to claim 8 of the present invention comprises a mechanical drive mechanism that rotates in a limited range around one axis, and a sub-array antenna formed by mounting an element antenna on a surface of a conformal structure. An array antenna, a switch matrix that switches and connects input communication signals and outputs the communication signals to the array antenna, a transmitter that supplies the communication signals to the switch matrix, a drive control signal that drives and controls the mechanical drive mechanism, and A controller for calculating a connection control signal for switching and connecting a switch matrix and a phase control signal for controlling the phase of the element antenna, and rotating the mechanical drive mechanism by the drive control signal to thereby emit a beam in the direction of a communication partner. The main axis direction of the beam, which limits the scanning range, is fixed, and the switch And connection switching matrix supplying the communication signal output from the transmitter to the array antenna performs beam scanning by controlling the phase of said element antennas by the phase control signal, the conformal shape structure It is characterized in that the side surface is used as a heat discharge surface.
[0018]
BEST MODE FOR CARRYING OUT THE INVENTION
Next, an embodiment of the present invention will be described in detail with reference to the drawings.
[0019]
FIG. 1 is a block diagram of one embodiment of the present invention. The configuration will be described with reference to this block diagram.
[0020]
The satellite-borne disturbance suppression beam directing antenna according to the present invention includes an array antenna 6, a switch matrix 7, and transmitters 11-1 to 11 which are an aggregate of sub-array antennas 6-1 to 6-m (m is an integer of 2 or more). -N (n is an integer of 2 or more), an n distributor 12, a controller 13, and a mechanical drive mechanism 14.
[0021]
The sub-array antennas 6-1 to 6-m are configured to include sub-sub-array antennas 5-1 to 5-k (k is an integer of 2 or more). 1 to 4-j (j is an integer of 2 or more) and a j-divider 3, and the array antenna modules 4-1 to 4-j respectively include phase shifters 2-1 to 2-i (i is (I.e., an integer of 2 or more).
[0022]
In other words, the array antenna 6 has a hierarchy of sub-array antennas 6-1 to 6-m, sub-sub-array antennas 5-1 to 5-k, array antenna modules 4-1 to 4-j, and element antennas 1-1 to 1-i. Make up the structure.
[0023]
The transmitters 11-1 to 11-n are configured to include the transmission modules 8-1 to 8-k, the k distributor 9, and the excitation amplifier 10.
[0024]
The switch matrix 7 includes switch elements arranged in a matrix, and has a function of switching a communication signal input to an arbitrary input terminal to an arbitrary output terminal in accordance with a connection control signal from the controller 13. Specifically, communication signals supplied from the transmission modules 8-1 to 8-k are input and output to the sub-sub-array antennas 5-1 to 5-k. Therefore, the sub-array antennas 6-1 to 6-m are switched and connected to the transmitters 11-1 to 11-n.
[0025]
The controller 13 sends a drive control signal for controlling the drive of the mechanical drive mechanism 14, receives and transmits satellite position / attitude information from an attitude control subsystem (not shown), calculates a directional direction that changes every moment, and generates a switch matrix. 7 to send a connection control signal for switching connection. Further, it calculates and sends out a phase control signal for controlling the phase of the phase shifters 2-1 to 2-i connected to the element antennas 1-1 to 1-i.
[0026]
The mechanical drive mechanism 14 rotates in a limited range around one axis to set a beam main axis direction that limits a beam scanning range.
[0027]
The beam is formed by combining the beams of the sub-array antennas 6-1 to 6-m, and the beam direction is controlled by scanning the beam in the direction of the communication partner in the set main beam axis direction.
[0028]
Since the angle with the data relay satellite, which is the communication partner, fluctuates every moment, the combination of the sub-array antennas 6-1 to 6-m is changed accordingly. The sub-array antennas 6-1 to 6-m are composed of intermediate sub-sub-array antennas 5-1 to 5-k in order to maintain the phase / amplitude continuity characteristic at the time of plane switching during beam scanning.
[0029]
One of the surfaces 18 (see FIG. 2) includes the sub-sub-array antennas 5-1 to 5-k. The face switching is switching from one of the adjacent faces 18 to the other. Specifically, the operation of one of the sub-sub-array antennas 5-1 to 5-k operating on one surface of the adjacent surface 18 is stopped, and the sub-sub-array antennas not operating on the other surface at the same time are stopped. One of the operations 5-1 to 5-k is started. The surface can be switched by stopping the operation and starting the operation one after another.
[0030]
A switch matrix 7 is provided for controlling the combination of the sub-array antennas 6-1 to 6-m and the switching connection between the sub-array antennas 5-1 to 5-k and the transmission modules 8-1 to 8-k. 1 to 11-n are minimized. For example, the switch matrix 7 can switch and connect the transmitting modules 8-1 to 8 -k and the sub-subarray antennas 5-1 to 5-k with (k × n) inputs and (k × m) outputs. I have.
[0031]
The communication coverage (communication coverage) is required to be a hemisphere or more in the case of a satellite mounted, but the communication coverage is specified in a limited time, so that the element antennas 1-1 to 1-i Need not have a quantity that covers the entire hemisphere. For this reason, it is possible to reduce the size of the antenna in combination with the mechanical drive mechanism 14. If the beam is directionally controlled by mechanical driving during communication, disturbance occurs and causes distortion of the observed image. Therefore, mechanical driving by the mechanical driving mechanism 14 is basically only for setting the initial direction of the beam (beam main axis direction). use.
[0032]
FIG. 2 is a perspective view of the conformal structure 17, and FIG. 3 is a plan view (upper view of FIG. 3) and a side view (lower view of FIG. 3) of the conformal structure 17. The structure of an embodiment of the present invention will be described with reference to FIGS.
[0033]
Of X, Y, and Z shown in FIGS. 2 and 3, for example, X indicates a direction opposite to the center of the earth, and Z indicates a flight direction of the satellite 19.
[0034]
The surface 16c has the shape of a polyhedron in which a part of a spherical surface has been cut out, and each of the surfaces becomes a surface 18 (in FIG. 2, one of the many surfaces 18 is hatched). Element antennas 1-1 to 1-i included in 1 to 6-m are mounted. The cut side surface 16b is used as a heat exhaust surface for radiating the heat generated by the transmitters 11-1 to 11-n mounted in the inside 16a to outer space. The n-divider 12, the transmitters 11-1 to 11-n, the switch matrix 7, the j-divider 3, and the phase shifters 2-1 to 2-i can be incorporated in the interior 16a of the conformal structure 17. is there. The controller 13 for controlling the beam pointing may be provided outside the conformal structure 17. In order to limit the beam scanning range, the structure has a uniaxial mechanical drive mechanism 14 and raises the height with a raising boom 15 to secure clearance.
[0035]
Next, beam pointing control will be described. The operation of the beam pointing control includes mechanical driving by the mechanical drive mechanism 14 for setting the beam principal axis direction, and beam scanning by the array antenna 6 about the set beam principal axis direction. In the mechanical drive by the mechanical drive mechanism 14, the conformal structure 17 is swung like a seesaw within a limited range in the XY plane. That is, this limited range is rotated, and is not rotated once. This limited range differs depending on the communication coverage area.
[0036]
Next, the operation of the embodiment of the present invention will be described with reference to FIG. The mechanical driving is performed by the controller 13 based on the orbit information of the satellite 19 (see FIG. 5) registered in advance and the position information of the communication partner (in this case, the data relay satellite 21 in FIG. 5). Is calculated, a drive control signal is sent to the mechanical drive mechanism 14, and the angle of the mechanical drive mechanism 14 (setting in the beam main axis direction) is performed based on the drive control signal. This angle setting is performed in accordance with the communication coverage area that changes for each orbit.
[0037]
The position / attitude information of the satellite is transmitted / received from an attitude control subsystem (not shown), and the directional direction which changes every moment is calculated by the controller 13, and the sub-array antennas 6-1 to 6-m which need to supply communication signals and the transmitter Direction control of the beam is performed by switching connection with the switch 11 (switching connection by the switch matrix 7) and phase control of the phase shifters 2-1 to 2-i provided in the element antennas 1-1 to 1-i.
[0038]
The communication signal is input from the signal IN terminal and is distributed and supplied to the transmitters 11-1 to 11-n through the n distributor 12. The communication signals are amplified to required power by the excitation amplifiers 10 in the transmitters 11-1 to 11-n, and then input to the transmission modules 8-1 to 8-k via the k distributor 9. The communication signals that have been further power-amplified by the transmission modules 8-1 to 8 -k are switched and connected to the sub-array antennas 5-1 to 5-k in the sub-array antennas 6-1 to 6 -m. , A connection route is set.
[0039]
The sub-sub-array antennas 5-1 to 5-k are array antenna modules 4-1 to 4-j in which the element antennas 1-1 to 1-i having the phase shifters 2-1 to 2-i are small-scaled. As a unit, a plurality of such units are combined, and a communication signal is supplied via a j-divider 3 and subjected to phase control by phase shifters 2-1 to 2-i. The beam is emitted from -1 to 1-i, and beam pointing control is performed by spatial synthesis.
[0040]
FIG. 4 shows an example of a beam directing direction, a beam scanning angle, and a beam main axis direction. In FIG. 4, the beam main axis direction is a direction set by driving the mechanical drive mechanism 14. That is, as shown in FIG. 3, when the conformal structure 17 is not rotating in the XY plane, the main beam direction of the beam coincides with the X direction. The beam scanning angle is an angle scanned by the array antenna 6. The beam pointing direction is a value obtained by adding the beam main axis direction and the beam scanning angle.
[0041]
FIG. 5 is a diagram in which the beam 20 of the satellite-borne disturbance suppression beam directing antenna according to the embodiment of the present invention is directed to the data relay satellite 21 which is the communication partner. The raising boom 15 is mounted on the head of the satellite 19, and the conformal-shaped structure 17 rotates in an XY plane perpendicular to the flight direction Z of the satellite 19. The beam main axis direction is set to the direction of the data relay satellite 21, and the beam 20 is directed to the data relay satellite 21 by electronic beam scanning in which the phases of the element antennas 1-1 to 1-i are controlled.
[0042]
Next, an example of the design results of the element antennas 1-1 to 1-i and the like for the earth observation satellite will be described. If i = 8, j = 8, k = 16, m = 70 and n = 20, the switch matrix 7 has 16 × 20 (k × n) inputs and 16 × 70 (k × m) outputs. When one beam is formed on 16 surfaces of the sub-array antennas 6-1 to 6-m, 256 transmission modules 8-1 to 8-k operate simultaneously.
[0043]
In the above description, communication with the data relay satellite, that is, inter-satellite communication is considered, but it is also possible to apply to direct communication with the ground. In addition, although an array antenna provided on a conformal structure is used for the purpose of continuous communication without momentary interruption in communication, the number of surfaces formed on the conformal structure is reduced and several flat plates are combined. May be used.
[0044]
【The invention's effect】
Even in missions such as earth observation satellites that require a resolution of 5 m or less, an antenna that does not disturb the image due to disturbance during mechanical driving can be realized, so there is 100 times or more communication time compared to direct transmission, and more immediate There is an effect that inter-satellite communication having an advantage of being able to be achieved can be realized.
[0045]
In addition, in order to realize a scale for use on a satellite with limited mass and power, a mechanical drive mechanism was partially left for setting the initial beam pointing direction (beam main axis direction) for limiting the communication coverage area. The effect is that the area can be expanded.
[0046]
Further, by providing a switch matrix for coping with the switching connection of the sub-array antenna, the number of transmitters can be minimized.
[0047]
Furthermore, by mounting the element antenna on the surface of a conformal structure with a part of the spherical surface cut off, the beam scanning range of the array antenna can be expanded compared to a flat structure. is there.
[0048]
The above effects are calculated from the mass aspect. Compared to a state without a mechanical drive mechanism and a switch matrix (in this state, the conformal structure has a shape close to a spherical surface), the mass can be reduced to 1/100 or less after the mass is reduced. For example, the mass after reduction by using the switch matrix is about 1/225, and the mass after reduction by using the mechanical drive mechanism together is about 1/2.
[Brief description of the drawings]
FIG. 1 is a block diagram of a satellite-borne disturbance suppressing beam directing antenna according to an embodiment of the present invention.
FIG. 2 is a perspective view of a disturbance suppressing beam directing antenna for onboard satellite according to an embodiment of the present invention.
FIG. 3 is a plan view (upper view of FIG. 3) and a side view (lower view of FIG. 3) of a structural base of the disturbance suppressing beam directing antenna mounted on a satellite according to an embodiment of the present invention.
FIG. 4 is a diagram showing the relationship between the directing direction and the beam principal axis direction of the disturbance suppression beam directing antenna for onboard satellite according to one embodiment of the present invention.
FIG. 5 is a diagram in which a beam of a satellite-borne disturbance suppression beam directing antenna according to an embodiment of the present invention is directed to a data relay satellite.
[Explanation of symbols]
1-1 to 1-i Element antenna 2-1 to 2-i Phase shifter 3 j Distributor 4-1 to 4-j Array antenna module 5-1 to 5-k Sub-subarray antenna 6 Array antenna 6-1 6-m sub-array antenna 7 switch matrix 8-1 to 8-k transmission module 9 k distributor 10 excitation amplifier 11-1 to 11-n transmitter 12 n distributor 13 controller 14 mechanical drive mechanism 15 raising boom 16a internal 16b Side 16c Surface 17 Conformal shaped structure 18 Surface 19 Satellite 20 Beam 21 Data relay satellite

Claims (8)

A one-axis mechanical drive mechanism for setting the beam main axis direction that limits the beam scanning range, an array antenna formed by mounting element antennas on each surface of the conformal structure, and power amplification of communication signals. a switch matrix for connecting switch between the array antenna and transmission module for transmitting Te, and a transmitter configured to include the transmission module, the mechanical drive and fixed to the beam main axis direction to rotate the mechanical drive mechanism Suppress the disturbance that occurs , stop and start the operation of the element antennas mounted on one and the other of the adjacent surfaces of the surfaces one after another, from one of the adjacent surfaces to the other. by performing the surface switching, directional control the beam to a communication partner by controlling the phase with connecting switches the array antenna For Satellite disturbance suppression beam directional antenna, characterized in Rukoto. Switching a mechanical drive mechanism for rotating the range limited mainly uniaxial, an array antenna consisting of subarray antenna formed by mounting the antenna elements on each side of the co informal shape structure, a communication signal input A switch matrix that is connected to output to the array antenna, a transmitter that supplies the communication signal to the switch matrix, a drive control signal that drives and controls the mechanical drive mechanism, and a connection control signal that switches and connects the switch matrix. And a controller for calculating a phase control signal for controlling the phase of the element antenna, the main axis direction of the beam to limit the scanning range of the beam in the direction of the communication partner by rotating the mechanical drive mechanism by the drive control signal fixed, by connecting switches the switch matrix by the connection control signal, before Performing successively the stop and start of operation of the antenna elements are mounted on one and the other of said surfaces adjacent among the surfaces, thereby surface switching from one of said surfaces adjacent to the other, the phase control the element for satellite disturbance suppression beam directional antenna, characterized in that the control antenna phase by the signal. The sub-array antenna includes a sub-sub-array antenna, the sub-sub-array antenna includes an array antenna module and a distributor, and the array antenna module includes the element antenna and a phase shifter. The directional disturbance suppressing beam directing antenna for use in a satellite according to claim 2 , characterized in that: A mechanical drive mechanism that rotates in a limited range around one axis, an array antenna composed of a sub-array antenna formed by mounting an element antenna on the surface of a conformal structure, and switching and connecting input communication signals. A switch matrix that outputs to the array antenna, a transmitter that supplies the communication signal to the switch matrix, a drive control signal that drives and controls the mechanical drive mechanism, a connection control signal that switches and connects the switch matrix, and the element antenna And a controller for calculating a phase control signal for controlling the phase of the beam, fixing the main beam direction of the beam to limit the scanning range of the beam in the direction of the communication partner by rotating the mechanical drive mechanism by the drive control signal, The switch matrix is switched and connected by the connection control signal to The communication signal output from the transmitter is supplied to the antenna performs beam scanning by controlling the phase of said element antennas by the phase control signal,
The subarray antenna, the element composed of a plurality of sub sub array antenna comprising a phase shifter connected antenna and to the antenna elements, the transmitter, the communication signal to the power amplification, of the sub-sub-array antenna configured to include the number transmission module equal to the number, the by transmitting module and switching the sub sub array antenna connected, it characterized by preventing the interruption of communication satellites for mounting the disturbance suppression beam steering antenna . 3. The beam suppression antenna according to claim 2, wherein an arbitrary number of the sub-array antennas are operated to form a beam. The disturbance suppression for onboard satellite according to claim 2, wherein the number of the transmitters is reduced by reducing the number of the input terminals at the input terminals and the output terminals of the switch matrix to be smaller than the number of the output terminals. Beam pointing antenna. A mechanical drive mechanism that rotates in a limited range around one axis, an array antenna composed of a sub-array antenna formed by mounting an element antenna on the surface of a conformal structure, and switching and connecting input communication signals. A switch matrix that outputs to the array antenna, a transmitter that supplies the communication signal to the switch matrix, a drive control signal that drives and controls the mechanical drive mechanism, a connection control signal that switches and connects the switch matrix, and the element antenna And a controller for calculating a phase control signal for controlling the phase of
Forming a sub-sub-array antenna including the element antenna and a phase shifter connected to the element antenna and a distributor connected to the phase shifter, configuring the sub-array antenna including a plurality of the sub-sub-array antennas,
The drive control signal rotates the mechanical drive mechanism to fix the beam main axis direction that limits the beam scanning range in the direction of the communication partner, and switches and connects the switch matrix by the connection control signal to connect the array antenna to the array antenna. Supplying the communication signal output from the transmitter, performing beam scanning by controlling the phase of the element antenna by the phase control signal,
The number of input terminals of the switch matrix amplifies the power of the communication signal, and is equal to the product of the number of transmission modules and the number of transmitters included in one of the transmitters, and the number of output terminals of the switch matrix. quantity, before hexa Bed subarray for satellite disturbance suppression beam directional antenna, wherein the number of antennas is equal to the product of the number of the sub-array antenna. A mechanical drive mechanism that rotates in a limited range around one axis, an array antenna composed of a sub-array antenna formed by mounting an element antenna on the surface of a conformal structure, and switching and connecting input communication signals. A switch matrix that outputs to the array antenna, a transmitter that supplies the communication signal to the switch matrix, a drive control signal that drives and controls the mechanical drive mechanism, a connection control signal that switches and connects the switch matrix, and the element antenna And a controller for calculating a phase control signal for controlling the phase of the beam, fixing the main beam direction of the beam to limit the scanning range of the beam in the direction of the communication partner by rotating the mechanical drive mechanism by the drive control signal, The switch matrix is switched and connected by the connection control signal to The communication signal output from the transmitter is supplied to the antenna performs beam scanning by controlling the phase of said element antennas by the phase control signal,
The conformal shape structure side satellite mounting the disturbance suppression beam directional antenna you characterized by using as the exhaust heat surface of the.

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