EP3916905A1 - Band changer and communication system including same - Google Patents
Band changer and communication system including same Download PDFInfo
- Publication number
- EP3916905A1 EP3916905A1 EP19912131.0A EP19912131A EP3916905A1 EP 3916905 A1 EP3916905 A1 EP 3916905A1 EP 19912131 A EP19912131 A EP 19912131A EP 3916905 A1 EP3916905 A1 EP 3916905A1
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- European Patent Office
- Prior art keywords
- rotor
- band
- transceiver
- communication system
- wave
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/08—Means for collapsing antennas or parts thereof
- H01Q1/084—Pivotable antennas
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q5/00—Arrangements for simultaneous operation of antennas on two or more different wavebands, e.g. dual-band or multi-band arrangements
- H01Q5/40—Imbricated or interleaved structures; Combined or electromagnetically coupled arrangements, e.g. comprising two or more non-connected fed radiating elements
- H01Q5/45—Imbricated or interleaved structures; Combined or electromagnetically coupled arrangements, e.g. comprising two or more non-connected fed radiating elements using two or more feeds in association with a common reflecting, diffracting or refracting device
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/12—Supports; Mounting means
- H01Q1/125—Means for positioning
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/12—Supports; Mounting means
- H01Q1/22—Supports; Mounting means by structural association with other equipment or articles
- H01Q1/24—Supports; Mounting means by structural association with other equipment or articles with receiving set
- H01Q1/247—Supports; Mounting means by structural association with other equipment or articles with receiving set with frequency mixer, e.g. for direct satellite reception or Doppler radar
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q15/00—Devices for reflection, refraction, diffraction or polarisation of waves radiated from an antenna, e.g. quasi-optical devices
- H01Q15/14—Reflecting surfaces; Equivalent structures
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q19/00—Combinations of primary active antenna elements and units with secondary devices, e.g. with quasi-optical devices, for giving the antenna a desired directional characteristic
- H01Q19/10—Combinations of primary active antenna elements and units with secondary devices, e.g. with quasi-optical devices, for giving the antenna a desired directional characteristic using reflecting surfaces
- H01Q19/18—Combinations of primary active antenna elements and units with secondary devices, e.g. with quasi-optical devices, for giving the antenna a desired directional characteristic using reflecting surfaces having two or more spaced reflecting surfaces
- H01Q19/19—Combinations of primary active antenna elements and units with secondary devices, e.g. with quasi-optical devices, for giving the antenna a desired directional characteristic using reflecting surfaces having two or more spaced reflecting surfaces comprising one main concave reflecting surface associated with an auxiliary reflecting surface
- H01Q19/192—Combinations of primary active antenna elements and units with secondary devices, e.g. with quasi-optical devices, for giving the antenna a desired directional characteristic using reflecting surfaces having two or more spaced reflecting surfaces comprising one main concave reflecting surface associated with an auxiliary reflecting surface with dual offset reflectors
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q3/00—Arrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system
- H01Q3/12—Arrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system using mechanical relative movement between primary active elements and secondary devices of antennas or antenna systems
- H01Q3/16—Arrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system using mechanical relative movement between primary active elements and secondary devices of antennas or antenna systems for varying relative position of primary active element and a reflecting device
- H01Q3/18—Arrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system using mechanical relative movement between primary active elements and secondary devices of antennas or antenna systems for varying relative position of primary active element and a reflecting device wherein the primary active element is movable and the reflecting device is fixed
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q3/00—Arrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system
- H01Q3/02—Arrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system using mechanical movement of antenna or antenna system as a whole
- H01Q3/08—Arrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system using mechanical movement of antenna or antenna system as a whole for varying two co-ordinates of the orientation
Abstract
Description
- Example embodiments relate to a band changer and a communication system including the band changer.
- An antenna, one of components for a communication system, refers to a device configured to transmit and receive radio waves of a set band. A plurality of antennas has been required to transmit and receive a plurality of waves having different bands. However, using such multiple antennas may be ineffective in terms of space use and costs, and not facilitate maintenance or repair. Thus, a single antenna including a plurality of transceivers having different bands is under development. For example,
Korean Patent Registration No. 10-1757681 - According to an example embodiment, there is provided a band changer including a rotor having a rotation axis, and a plurality of transceivers disposed separately from the rotation axis and provided in the rotor along a circumferential direction of the rotor, and configured to transmit and receive waves respectively having different bands. The transceivers used herein may indicate transmitters and receivers.
- The rotor may be configured to rotate on the rotation axis such that a transceiver configured to transmit and receive a wave of a target band is located at a communication position by which a wave path is defined.
- The rotor may be configured to rotate both in a first direction, and a second direction which is opposite to the first direction.
- The rotor may be configured to rotate only in the first direction.
- A distance between the rotation axis and a first axis of a first transceiver among the transceivers may be equal to a distance between the rotation axis and a second axis of a second transceiver among the transceivers.
- The rotation axis, the first axis, and the second axis may be parallel to one another.
- The transceivers may be connected directly to one another.
- According to another example embodiment, there is provided a communication system including a band changer including a main reflector, a sub-reflector, a rotor having a rotation axis, and a plurality of transceivers disposed separately from the rotation axis, provided in the rotor along a circumferential direction of the rotor, and configured to transmit and receive waves respectively having different bands. The rotor may be configured to rotate on the rotation axis such that a wave path leading to the main reflector, the sub-reflector, and one of the transceivers is formed.
- The rotor may be rotatably provided in the main reflector to rotate with respect to the main reflector.
- The rotor may be provided in an edge area of the main reflector.
- The sub-reflector may include a sub-reflection plate disposed to face the edge area of the main reflector, and a supporting arm fixed to the main reflector and extending from the main reflector, and configured to support the sub-reflection plate.
- The band changer may further include a stator provided in the main reflector and configured to support a rotation of the rotor.
- The transceivers may be disposed to pass through front and rear sides of the rotator along the rotation axis of the rotor.
- According to still another example embodiment, there is provided a communication system including a band changer including a rotor having a rotation axis, and a plurality of transceivers disposed separately from the rotation axis, provided in the rotor along a circumferential direction of the rotor, and configured to transmit and receive waves respectively having different bands, a controller configured to generate a control signal that determines a rotation angle of the rotor in response to selection of a wave by a user such that a transceiver configured to transmit and receive a wave of a target band is located at a communication position by which a wave path is defined on a circumference of the rotor, and a driver configured to operate the rotor to allow the rotor to rotate based on the control signal.
- The controller may be configured to generate a first control signal in response to selection of a first wave by the user to rotate, by a first angle, a first transceiver configured to transmit and receive a wave of a first band, and generate a second control signal in response to selection of a second wave different from the first wave by the user to rotate, by a second angle different from the first angle, a second transceiver configured to transmit and receive a wave of a second band different from the first band.
- The communication system may further include a sensor configured to sense a rotation angle of the rotor with respect to the rotation axis.
- The band changer may further include a stopper configured to define a reference position that restricts a rotation of the rotor.
- The controller may be configured to generate a reference control signal to control a rotation of the rotor such that the first transceiver is located at the reference position restricting the rotation of the rotor.
- The controller may be configured to check whether the first transceiver is located at the reference position when the rotor operates.
- The controller may be configured to check whether a band of a wave transmitted and received by the transceiver located at the communication position after the rotor rotates by the determined rotation angle corresponds to the target band.
- According to yet another example embodiment, there is provided a method of controlling a band changer including a plurality of transceivers configured to transmit and receive waves respectively having different bands, the method including receiving an input on selection of a band from a user, generating a control signal based on the received input, and disposing, based on the control signal, a transceiver configured to transmit and receive a wave of a band selected by the user to be at a communication position by which a wave path is defined.
- The disposing may include moving, by a first distance, a first transceiver configured to transmit and receive a wave of a first band in response to selection of a first wave by the user to define a first wave path, and disposing the first transceiver at the communication position.
- The disposing may further include moving, by a second distance different from the first distance, a second transceiver configured to transmit and receive a wave of a second band in response to selection of a second wave different from the first wave by the user to define a second wave path, and disposing the second transceiver at the communication position.
- According to further example embodiment, there is provided a non-transitory computer-readable storage medium storing instructions that, when executed by a processor, cause the processor to perform the method.
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FIG. 1 is a diagram illustrating a communication system according to an example embodiment. -
FIG. 2 is a perspective view of a portion of a communication system according to an example embodiment. -
FIG. 3 is a perspective view of a communication system including a main reflector and a sub-reflector according to an example embodiment. -
FIG. 4 is a perspective view of a rear portion of a communication system according to an example embodiment. -
FIG. 5 is a perspective view of a band changer according to an example embodiment. -
FIG. 6 is a cross-sectional view of a communication system according to an example embodiment. -
FIG. 7 is a diagram illustrating a first state of a communication system according to an example embodiment. -
FIG. 8 is a diagram illustrating a second state of a communication system according to an example embodiment. -
FIG. 9 is a conceptual diagram illustrating a band changer according to an example embodiment. -
FIG. 10 is a conceptual diagram illustrating a band changer according to another example embodiment. -
FIG. 11 is a conceptual diagram illustrating a band changer according to still another example embodiment. -
FIG. 12 is a conceptual diagram illustrating a band changer according to yet another example embodiment. -
FIG. 13 is a conceptual diagram illustrating a structure configured to restrict a rotation of a rotor of a band changer according to an example embodiment. -
FIG. 14 is a flowchart illustrating an example of controlling a communication system according to an example embodiment. -
FIG. 15 is a flowchart illustrating another example of controlling a communication system according to an example embodiment. - Hereinafter, some examples will be described in detail with reference to the accompanying drawings. However, various alterations and modifications may be made to the examples. Here, the examples are not construed as limited to the disclosure and should be understood to include all changes, equivalents, and replacements within the idea and the technical scope of the disclosure.
- Although terms such as "first," "second," and "third" may be used herein to describe various members, components, regions, layers, or sections, these members, components, regions, layers, or sections are not to be limited by these terms. Rather, these terms are only used to distinguish one member, component, region, layer, or section from another member, component, region, layer, or section. Thus, a first member, component, region, layer, or section referred to in the examples described herein may also be referred to as a second member, component, region, layer, or section without departing from the teachings of the examples. Throughout the specification, when a component is described as being "connected to" or "coupled to" another component, it may be directly "connected to" or "coupled to" the other component, or there may be one or more other components intervening therebetween. In contrast, when an element is described as being "directly connected to" or "directly coupled to" another element, there can be no other elements intervening therebetween.
- Also, in the description of example embodiments, detailed description of structures or functions that are thereby known after an understanding of the disclosure of the present application will be omitted when it is deemed that such description will cause ambiguous interpretation of the example embodiments. Hereinafter, example embodiments will be described in detail with reference to the accompanying drawings, and like reference numerals in the drawings refer to like elements throughout.
- Referring to
FIGS. 1 through 8 , acommunication system 1 according to an example embodiment is configured to receive a wave of a target frequency band from an outside, or transmit a wave of a target frequency band to an outside. A wave used herein may indicate a radio wave, or an electromagnetic wave. - The
communication system 1 includes acommunication device 10, adriver 20, and acontroller 30. - The
communication device 10 is configured to communicate with a target object. The target object may include, for example, a satellite that travels along a set orbit in a field of view (FoV) while transmitting and receiving waves. Thecommunication device 10 may be provided in a ship or vessel, for example. - The
communication device 10 includes amain reflector 110, a sub-reflector 120, aband changer 130, and apedestal 140. - The
main reflector 110 is configured to track a target object that travels in an FoV. Themain reflector 110 includes amain reflection plate 112 configured to reflect a wave. Themain reflection plate 112 is disposed in a direction facing the target object. Themain reflection plate 112 may have a cross-sectional profile in a roughly parabolic form, for example. Themain reflection plate 112 includes acenter area 112A and anedge area 112B. - The sub-reflector 120 includes a
sub-reflection plate 122 and a supportingarm 124. - The
sub-reflection plate 122 is configured to reflect a wave reflected from themain reflection plate 112 to theband changer 130, or reflect a wave from theband changer 130 to themain reflection plate 112. Thesub-reflection plate 122 is disposed in a direction facing themain reflection plate 112, in a direction facing theband changer 130, or in a direction facing a location therebetween. Thesub-reflection plate 122 may have a cross-sectional profile in a roughly parabolic form, for example. A size of thesub-reflection plate 122 may be smaller than a size of themain reflection plate 112. - The supporting
arm 124 is configured to support thesub-reflection plate 122. One end of the supportingarm 124 is fixed to an edge of themain reflection plate 112, and another end of the supportingarm 124 is fixed to thesub-reflection plate 122. In addition, the supportingarm 124 extends from themain reflection plate 112 and then bent or curved towards a center of themain reflection plate 112 based on a direction ofsub-reflection plate 122. - The
band changer 130 is configured to select one wave from a plurality of waves to transmit and receive a wave of a target band. Theband changer 130 includes astator 132, arotor 134, afirst transceiver 136A, and asecond transceiver 136B. - The
stator 132 is configured to support therotor 134 such that therotator 134 rotates with respect to thestator 132. Thestator 132 is provided in theedge area 112B of themain reflection plate 112. That is, theband changer 130 is provided in themain reflector 110. Such structure may be simpler in design, and have relatively higher levels of dimensional stability and structural rigidity, compared to a structure where theband changer 130 is provided in the sub-reflector 120. In addition, it is possible to replace only theband changer 130, while themain reflector 110 and the sub-reflector 120 are being used. - The
rotor 134 is rotatably provided in thestator 132 such that therotor 134 rotates with respect to thestator 132. Therotor 134 has a rotation axis X. Therotor 134 is configured to rotate on the rotation axis X. Therotor 134 may desirably have one-dimensional rotational degree of freedom (DoF) - The
rotor 134 has a plurality of rotational positions. The rotational positions may indicate rotation angles of therotor 134 with respect to a reference at which therotor 134 starts rotating. The rotation angles may include, for example, 30 degrees (°), 60°, 90°, 120°, and 180°. The rotational positions may correspond to or be associated with a band of a wave to be transmitted or received by a selected transceiver to define a wave path (WP) between the transceiver, thesub-reflection plate 122, and themain reflection plate 112. - The
rotor 134 is configured to rotate both in a first direction, and in a second direction opposite to the first direction. Alternatively, therotor 134 is configured to rotate only in the first direction. The first direction and the second direction may be one of a clockwise direction and a counterclockwise direction, respectively, with respect to the rotation axis X. - The
first transceiver 136A and thesecond transceiver 136B are configured to transmit and receive waves respectively having different bands. A band, or a frequency band, of a wave to be transmitted and received by thefirst transceiver 136A and thesecond transceiver 136B may include, for example, an L band, an S band, a C band, an X band, a Ku band, a K band, a Ka band, a Q band, a U band, a V band, an E band, a W band, an F band, a D band, and the like. A shape and a size of thefirst transceiver 136A and thesecond transceiver 136B may depend on a characteristic of a band of a wave to be transmitted and received by thefirst transceiver 136A and thesecond transceiver 136B. - The
first transceiver 136A and thesecond transceiver 136B are disposed separately from the rotation axis X, and provided in therotor 134 along a circumferential direction of therotor 134. When therotor 134 rotates on the rotation axis X, thefirst transceiver 136A and thesecond transceiver 136B also rotate on the rotation axis X along with therotor 134. How thefirst transceiver 136A and thesecond transceiver 136B are arranged in therotor 134 may be affected by a size of therotor 134. Thus, since therotor 134 is relatively small, thefirst transceiver 136A and thesecond transceiver 136B may form a relatively small rotation area. Thus, theband changer 130 may have a reduced rotational moment of inertia. - The
first transceiver 136A and thesecond transceiver 136B have a first axis A1 in a longitudinal direction of thefirst transceiver 136A and a second axis A2 in a longitudinal direction of thesecond transceiver 136B, respectively. The first axis A1 and the second axis A2 are parallel to the rotation axis X. In addition, a distance between the rotation axis X and the first axis A1 is practically the same as a distance between the rotation axis X and the second axis A2. Through such structure, it is possible to achieve a relatively high level of positional precision of the plurality of transceivers including, for example, thefirst transceiver 136A and thesecond transceiver 136B, while theband changer 130 is performing radio communication with an external target object. - The
first transceiver 136A and thesecond transceiver 136B are directly connected to each other. Thefirst transceiver 136A and thesecond transceiver 136B rotate, as a single rigid body, on the rotation axis X along with therotor 134 while therotor 134 is rotating on the rotation axis X. Such structure may improve structural rigidity of theband changer 130, and reduce a rotational moment of inertia of theband changer 130. Thus, a driving torque required to drive or operate theband changer 130 may be reduced accordingly. - The
first transceiver 136A includes afirst body 137A extending from therotor 134 by passing through front and rear sides of therotor 134, and afirst feed horn 138A provided at an end of thefirst body 137A and configured to transmit and receive a wave of a first band. Thesecond transceiver 136B includes asecond body 137B extending from therotor 134 by passing through front and rear sides of therotor 134 and asecond feed horn 138B provided at an end of thesecond body 137B and configured to transmit and receive a wave of a second band different from the first band. A difference in terms of size and shape between thefirst body 137A and thesecond body 137B may depend on a characteristic of a wave to be transmitted and received. - The
pedestal 140 is configured to support themain reflector 110. Thepedestal 140 includes, for example, a base and a shaft extending from the base. The base may be provided in a target object, for example, a ship. The shaft is configured to rotate with respect to the base. Themain reflector 110 is provided to rotate on the shaft. Themain reflector 110 rotates on an elevation axis passing a side of the shaft. - The
driver 20 is configured to supply power to thecommunication device 10 to operate thecommunication device 10. Thedriver 20 includes afirst actuator 210 configured to supply power to themain reflector 110 such that themain reflector 110 rotates on the elevation axis, asecond actuator 220 configured to supply power to theband changer 130 such that theband changer 130 transmits and receives a wave of a target band, and abelt 230 connected to thesecond actuator 220 and theband changer 130 and configured to transfer power of thesecond actuator 220 to theband changer 130. Thefirst actuator 210 and thesecond actuator 220 are provided in themain reflector 110. In addition, thedriver 20 may further include one or more additional actuators such that themain reflector 110 rotates on one or more other axes, instead of the elevation axis. - The
controller 30 is configured to generate at least one control signal to control an operation of theband changer 130 such that thedriver 20 allows therotor 134 to rotate on the rotation axis X and theband changer 130 transmits and receives a wave of a target band. For a detailed description of how thecontroller 30 controls an operation of theband changer 130, reference may be made to the foregoing description of a structure of theband changer 130 and a description of an operation of theband changer 130 to be provided hereinafter. In addition, how thecontroller 30 controls the operation will be described in detail with reference toFIGS. 14 and15 . - Referring to
FIGS. 6 ,7 , and8 , when the rotor 134 (refer toFIG. 4 ) rotates by a first angle, a state of thecommunication system 1 in which a wave path WP between an external source and themain reflection plate 112, a wave path WP1 between themain reflection plate 112 and thesub-reflection plate 122, and a wave path WP2 between thesub-reflection plate 122 and thefirst transceiver 136A are defined may be verified. In such state, communication of a wave of a first band may be performed between the external source and thefirst transceiver 136A. - Referring to
FIGS. 6 and8 , when the rotor 134 (refer toFIG. 4 ) rotates by a second angle, the wave path WP between the external source and themain reflection plate 112 and the wave path WP1 between themain reflection plate 112 and thesub-reflection plate 122 may be maintained the same, while the wave path WP2 between thesub-reflection plate 122 and thefirst transceiver 136A may be changed to a wave path (not shown) between thesub-reflection plate 122 and thesecond transceiver 136B. In such state, communication of a wave of a second band different from the first band may be performed between the external source and thesecond transceiver 136B. - As described above, the
main reflection plate 112 and thesub-reflection plate 122 may operate independently irrespective of a characteristic of a band of a wave to be transmitted and received. For example, thecommunication system 1 may allow themain reflection plate 112 to rotate on the elevation axis, irrespective of whether the wave of the first band or the wave of the second band is to be transmitted and received. - Referring to
FIG. 10 , a band changer according to another example embodiment includes threetransceivers transceivers transceivers transceivers transceivers - Referring to
FIG. 11 , a band changer according to still another example embodiment includes fourtransceivers transceivers transceivers transceivers transceivers - Referring to
FIG. 12 , a band changer according to yet another example embodiment includes a plurality oftransceivers - Referring to
FIG. 13 , a band changer according to an example embodiment further includes astopper 139 configured to mechanically restrict a rotation of a plurality oftransceivers stopper 139 may be provided in the rotor 134 (refer toFIG. 4 ) in which thetransceivers stopper 139 is configured to prevent unrestricted rotations in one rotational direction of therotor 134. In addition, thestopper 139 is configured to provide a reference position of therotor 134. For example, the reference position may be set to be a position at which thefirst transceiver 136A is restricted by thestopper 139 as rotating in a clockwise direction when therotor 134 operates initially (refer toFIG. 13 ). Alternatively, the reference position may be set to be a position at which thethird transceiver 136C is restricted by thestopper 139 as rotating in a counterclockwise direction when therotor 134 operates initially (refer toFIG. 13 ). Thestopper 139 is provided in a shape or form extending in a radius direction of therotor 134. - Hereinafter, a control method of a communication system will be described in detail. For components to be described with reference to
FIGS. 14 and15 , reference may be made to the foregoing description of the components provided above. - Referring to
FIG. 14 , inoperation 1410, a communication system according to an example embodiment checks whether a rotor is located at a reference position. The communication system may include, for example, a sensor configured to sense a rotation angle of the rotor. A controller of the communication system may control a rotation of the rotor based on a rotation angle of the rotor that is sensed by the senor. - When the rotor is not located at the reference position, the communication system operates the rotor to be at the reference position in
operation 1412, and checks again whether the rotor is located at the reference position inoperation 1410. - In
operation 1420, when the rotor is located at the reference position, the communication system operates the rotor to be at a communication position. The communication position used herein may be associated with a position of a transceiver configured to transmit and receive a wave of a target band that the communication system desires to transmit and receive. That is, the communication position may be a position on a circumference of the rotor by which a wave path is to be defined. Inoperation 1430, the communication system checks whether the rotor is located at the communication position. - When the rotor is not located at the communication position, the communication system operates again the rotor to be at the communication position in
operation 1420. - In
operation 1440, when the rotor is located at the communication position, the communication system maintains the rotor being at the communication position. - Although not illustrated, as a set time elapses while the rotor stays at the communication position in
operation 1440, the communication system operates the rotor inoperation 1420 such that a transceiver having another target band to transmit and receive a wave of the other target band is to be located at the communication position. - Referring to
FIG. 15 , a communication system according to an example embodiment controls an operation of a rotor based on an input of a user. Inoperation 1510, the communication system operates the rotor such that a transceiver having a target band is to be at a communication position based on an input of a user on a desired target band of the user. Inoperation 1520, the communication system checks whether a currently transmitting and receiving band corresponds to the target band at a current angle of the rotor. - In
operation 1530, when the current band corresponds to the target band, the communication system maintains the transceiver that transmits and receives the target band to stay at the communication position. That is, the communication system maintains the current angle of the rotor. - In
operation 1522, when the current band does not correspond to the target band, the communication system operates the rotor such that the transceiver having the target band is to be located at the communication position. Inoperation 1524, the communication system checks whether the transceiver having the target band is located at the communication position. When the transceiver is located at the communication position, the communication system maintains the transceiver to stay at the communication position inoperation 1530. When the transceiver is not located at the communication position, the communication system operates the rotor such that the transceiver having the target band is to be located at the communication position inoperation 1522. - The methods according to the above-described example embodiments may be recorded in non-transitory computer-readable media including program instructions to implement various operations of the above-described example embodiments. The media may also include, alone or in combination with the program instructions, data files, data structures, and the like. The program instructions recorded on the media may be those specially designed and constructed for the purposes of example embodiments, or they may be of the kind well-known and available to those having skill in the computer software arts. Examples of non-transitory computer-readable media include magnetic media such as hard disks, floppy disks, and magnetic tape; optical media such as CD-ROM discs, DVDs, and/or Blue-ray discs; magneto-optical media such as optical discs; and hardware devices that are specially configured to store and perform program instructions, such as read-only memory (ROM), random access memory (RAM), flash memory (e.g., USB flash drives, memory cards, memory sticks, etc.), and the like. Examples of program instructions include both machine code, such as produced by a compiler, and files containing higher level code that may be executed by the computer using an interpreter. The above-described devices may be configured to act as one or more software modules in order to perform the operations of the above-described example embodiments, or vice versa.
- While this disclosure includes specific examples, it will be apparent to one of ordinary skill in the art that various changes in form and details may be made in these examples without departing from the spirit and scope of the claims and their equivalents. The examples described herein are to be considered in a descriptive sense only, and not for purposes of limitation. Descriptions of features or aspects in each example are to be considered as being applicable to similar features or aspects in other examples. Suitable results may be achieved if the described techniques are performed in a different order, and/or if components in a described system, architecture, device, or circuit are combined in a different manner and/or replaced or supplemented by other components or their equivalents.
Claims (24)
- A band changer comprising:a rotor having a rotation axis; anda plurality of transceivers disposed separately from the rotation axis and provided in the rotor along a circumferential direction of the rotor, the transceivers being configured to transmit and receive waves respectively having different bands.
- The band changer of claim 1, wherein the rotor is configured to rotate on the rotation axis such that a transceiver of the transceivers configured to transmit and receive a wave of a target band is located at a communication position by which a wave path is defined.
- The band changer of claim 1, wherein the rotor is configured to rotate both in a first direction, and a second direction which is opposite to the first direction.
- The band changer of claim 1, wherein the rotor is configured to rotate only in a first direction.
- The band changer of claim 1, wherein a distance between the rotation axis and a first axis of a first transceiver among the transceivers is equal to a distance between the rotation axis and a second axis of a second transceiver among the transceivers.
- The band changer of claim 5, wherein the rotation axis, the first axis, and the second axis are parallel to one another.
- The band changer of claim 1, wherein the transceivers are connected directly to one another.
- A communication system comprising:a main reflector;a sub-reflector;a band changer comprising:a rotor having a rotation axis, anda plurality of transceivers disposed separately from the rotation axis and provided in the rotor along a circumferential direction of the rotor, the transceivers being configured to transmit and receive waves respectively having different bands,wherein the rotor is configured to rotate on the rotation axis such that a wave path leading to the main reflector, the sub-reflector, and one of the transceivers is formed.
- The communication system of claim 8, wherein the rotor is rotatably provided in the main reflector.
- The communication system of claim 9, wherein the rotor is provided in an edge area of the main reflector.
- The communication system of claim 10, wherein the sub-reflector includes:a sub-reflection plate disposed to face the edge area of the main reflector; anda supporting arm fixed to the main reflector and extending from the main reflector, the supporting arm being configured to support the sub-reflection plate.
- The communication system of claim 8, wherein the band changer further comprises:
a stator provided in the main reflector and configured to support a rotation of the rotor. - The communication system of claim 8, wherein the transceivers are disposed to pass through front and rear sides of the rotor along the rotation axis of the rotor.
- A communication system comprising:a band changer comprising a rotor having a rotation axis, and a plurality of transceivers disposed separately from the rotation axis and provided in the rotor along a circumferential direction of the rotor, the transceivers being configured to transmit and receive waves respectively having different bands;a controller configured to generate a control signal that determines a rotation angle of the rotor such that a transceiver configured to transmit and receive a wave of a target band is located at a communication position by which a wave path is defined on a circumference of the rotor; anda driver configured to operate the rotor to allow the rotor to rotate based on the control signal.
- The communication system of claim 14, wherein the controller is configured to:generate a first control signal in response to selection of a first band to rotate, by a first angle, a first transceiver configured to transmit and receive a wave of the first band;andgenerate a second control signal in response to selection of a second band different from the first band to rotate, by a second angle different from the first angle, a second transceiver configured to transmit and receive a wave of the second band different from the first band.
- The communication system of claim 14, further comprising:
a sensor configured to sense a rotation angle of the rotor with respect to the rotation axis. - The communication system of claim 14, wherein the band changer further comprises:
a stopper configured to define a reference position that restricts a rotation of the rotor. - The communication system of claim 14, wherein the controller is configured to:
generate a reference control signal to control a rotation of the rotor such that a first transceiver is located at a reference position restricting the rotation of the rotor. - The communication system of claim 18, wherein the controller is configured to:
check whether the first transceiver is located at the reference position when the rotor operates. - The communication system of claim 14, wherein the controller is configured to:
check whether a band of a wave transmitted and received by the transceiver located at the communication position after the rotor rotates by the determined rotation angle corresponds to the target band. - A method of controlling a band changer comprising a plurality of transceivers configured to transmit and receive waves respectively having different bands, the method comprising:receiving an input on selection of a band;generating a control signal based on the received input; anddisposing, based on the control signal, a transceiver configured to transmit and receive a wave of the selected band to be at a communication position by which a wave path is defined.
- The method of claim 21, wherein the disposing comprises:
moving, by a first distance, a first transceiver configured to transmit and receive a wave of a first band in response to selection of the first band to define a first wave path, and disposing the first transceiver at the communication position. - The method of claim 22, wherein the disposing further comprises:
moving, by a second distance different from the first distance, a second transceiver configured to transmit and receive a wave of a second band in response to selection of the second band different from the first band to define a second wave path, and disposing the second transceiver at the communication position. - A non-transitory computer-readable storage medium storing instructions that, when executed by a processor, cause the processor to perform the method of claim 21.
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KR20190009063 | 2019-01-24 | ||
KR1020190113064A KR102226965B1 (en) | 2019-01-24 | 2019-09-11 | Band changer and communication system comprising the same |
PCT/KR2019/012807 WO2020153569A1 (en) | 2019-01-24 | 2019-10-01 | Band changer and communication system including same |
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EP3916905A4 EP3916905A4 (en) | 2022-10-12 |
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GB2613473B (en) | 2020-11-19 | 2023-12-27 | Cambium Networks Ltd | A wireless transceiver having a high gain antenna arrangement |
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KR20010036922A (en) * | 1999-10-12 | 2001-05-07 | 박종섭 | Method and apparatus for controlling a sub-reflecter in an antenna |
KR100451639B1 (en) * | 2002-04-30 | 2004-10-12 | (주)하이게인안테나 | Satellite communication antenna using multiplex frequency band |
US9281561B2 (en) * | 2009-09-21 | 2016-03-08 | Kvh Industries, Inc. | Multi-band antenna system for satellite communications |
KR101230591B1 (en) * | 2011-03-10 | 2013-02-15 | 이승호 | Dual band satellite communication antenna system for sea |
JP2017003781A (en) * | 2015-06-10 | 2017-01-05 | 株式会社ミツトヨ | Method for controlling movement speed of optical element switching device |
KR101757681B1 (en) * | 2016-04-12 | 2017-07-26 | (주)인텔리안테크놀로지스 | Satellite communication antenna capable of receiving multi band signal |
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EP3916905A4 (en) | 2022-10-12 |
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