CN101895342A - Optical intelligent antenna for rapidly moving free space optical communication system - Google Patents
Optical intelligent antenna for rapidly moving free space optical communication system Download PDFInfo
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- CN101895342A CN101895342A CN2010102095690A CN201010209569A CN101895342A CN 101895342 A CN101895342 A CN 101895342A CN 2010102095690 A CN2010102095690 A CN 2010102095690A CN 201010209569 A CN201010209569 A CN 201010209569A CN 101895342 A CN101895342 A CN 101895342A
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Abstract
The invention discloses an optical intelligent antenna for rapidly moving a free space optical communication system, aiming to mainly solve the problems of capturing, aligning and tracking a communication target in the conventional free space optical communication system which is moved rapidly point-to-point. The optical intelligent antenna comprises a semi-spherical or spherical bottom plate (1), wherein laser receiving/sending arrays are arranged on the semi-spherical or spherical bottom plate (1); each laser receiving array (5) and each laser sending array (4) are arranged fully on the whole spherical or semi-spherical bottom plate every row to form the laser receiving/sending arrays with a honeycomb structure; and each laser receiving/sending array corresponds to a group of internal structure units which are embedded in a cavity body of the spherical or semi-spherical bottom plate so as to correspondingly adjust optical wave beams through a device in the structure units under the condition of space division time multiplexing and angle multiplexing. The optical intelligent antenna increases the communication coverage area, can automatically control the optical wave beams of a transmitting unit rapidly and in real time according to the movement of the communication target, and can be used in the field of wireless laser communication.
Description
Technical field
The invention belongs to the wireless laser communication technical field, relate to communication antenna, a kind of specifically optical intelligent antenna is applicable to the free space optical communication FSO system of fast moving.
Background technology
The free space optical communication FSO system of fast moving is as a kind of novel broadband wireless communication technique, has many unrivaled advantages and receives much concern, and compares with optical fiber communication, need not to lay optical cable, low price, the construction period is short, and frequency band can reach the optical fiber communication level; With the microwave communication ratio, high 1～2 order of magnitude of bandwidth ratio microwave, and need not to carry out the frequency application.Series of advantages such as equipment for wireless light communication has networking maneuverability, no electromagnetic interference, good concealment simultaneously, the ratio of performance to price is excellent, indoor and outdoor equipment is easy for installation.In recent years, along with building up substantially of backbone network, the appearance of last kilometer problem, and the designing and producing and the development and the maturation of installation calibrating technology of high power semiconductor lasers technology, self adaptation zoom technology, optical antenna, FSO has been subjected to people's extensive attention as one of communication hot spot technology.
Optical antenna is used to transmit and receive wave beam to guarantee normally carrying out of communication in the FSO system.The antenna system that existing optical antenna adopts the single-shot list to receive more, in order to increase area coverage and to overcome the antenna system that MIMO has appearred in multipath effect, but the sending and receiving antenna number of this MIMO system is generally all less than four.Above-mentioned antenna system can't satisfy area coverage maximization in fast moving FSO, also can't be in communication process the real-time directional characteristic that obtains link fast.The generating laser of the antenna system that also has adopts photodiode LED to replace superpower laser, but this antenna is only for being used for indoor environment, and can't satisfy outdoor large-scale communicating requirement.
Another important technology that influences continuity is the APT technology in the FSO system that moves.The recipient need catch, aim at and follow the tracks of the other side's communication target in free-space optical systems, i.e. the APT technology.At present, the FSO technology of fixed point is comparatively ripe, and the device that the automatic adjustment mechanical device by system itself can overcome among a small circle vibrates, and is implemented in the transfer of data of 100Mbps to 1Gbps magnitude in several kilometers.Yet mobile FSO technology also is in the experimental exploring stage, is because existing APT technology can't satisfy the particularly requirement of fast moving of mobile FSO.For example foreign vendor has released Lightpointe fixed point product, is characterized in being operated in 850nm wavelength place, transmission rate 100Mb/s, and transmission range adopts four four to receive antenna from 1 kilometer to 5 kilometers.Though the antenna following function of this product can reduce the small optical axis deviation that causes of rocking by building, does not possess quick A PT function on a large scale.Existing product at mobile FSO system, because what adopt is that machinery is with taking aim at mode, its with take aim at speed can't and communication target between translational speed be complementary, perhaps after obtaining concrete coordinate information, need long feedback time, these problems make communicating pair can't carry out real-time tracking when mobile in a big way, cause communication disruption then.Therefore existing APT technology still can not be applicable to the FSO system of fast moving on a large scale.
Summary of the invention
The objective of the invention is to overcome above-mentioned the deficiencies in the prior art, a kind of optical intelligent antenna is provided, to realize catching automatically, aiming at and following the tracks of between the communicating pair in the FSO system of fast moving on a large scale.
For achieving the above object, optical intelligent antenna of the present invention comprises:
Many group internal structures unit, base plate, a plurality of laser receives array and a plurality of laser are sent out array, and every group of internal structure unit is embedded in the cavity of base plate, and wherein base plate is shaped as sphere or hemisphere face; Each laser is received array and is sent out array with laser and be interlaced and filled on whole sphere or the hemisphere face base plate laser transmitting-receiving array of formation honeycomb; The corresponding one group of internal structure unit of each laser transmitting-receiving array.
According to above-mentioned optical intelligent antenna, wherein said each laser receipts array is made up of the delegation's receiving element that is arranged on the base plate, and each laser is sent out array and is made up of the delegation's transmitter unit that is arranged on the base plate.
According to above-mentioned optical intelligent antenna, the quantity of wherein said laser transmitting-receiving array is determined according to the size of the size of base plate and emission, receiving element.
According to above-mentioned optical intelligent antenna, wherein said every group of internal structure unit comprises an emission structural unit and a reception structural unit, and being shaped as of each structural unit is three-dimensional fan-shaped.
According to above-mentioned optical intelligent antenna, wherein said transmitter unit adopts identical six prismatics or the circular configuration of volume with receiving element.
According to above-mentioned optical intelligent antenna, wherein said each emission structural unit comprises semiconductor laser, Erbium-Doped Fiber Amplifier, two optical switch matrixes, a plurality of splitter and light path controllers; Described two optical switch matrixes are emitted on the front end of emission structural unit, and described a plurality of splitters are parallel between two optical switch matrixes; This light path controller is positioned at the below of two optical switch matrixes, is used to control the size of laser beam; This Erbium-Doped Fiber Amplifier and semiconductor laser front and rear row are placed on the back of second optical switch matrix, are used to launch laser.
According to above-mentioned optical intelligent antenna, wherein said a plurality of splitters, its number is corresponding with the number of transmitter unit.
According to above-mentioned optical intelligent antenna, wherein said each receive structural unit, comprising: one group of multimode fiber, a component electro-optical device, one group of PIN photodetector, one group of APD photodetector, one group of LOS logic, light path controller and combiner; This multimode fiber is emitted on the front end that receives structural unit, makes to receive the receive mode that light realizes receiving into fibre feed; This spectroscope is emitted on after the multimode fiber, and this APD photodetector and PIN photodetector lay respectively at spectroscopical upper right side and lower right side; This LOS logic be emitted on the PIN photodetector after, be used for the facula position information current value of the beacon beam that receives is analyzed; Described light path controller is emitted on reception
The suitable light transmission antenna unit of selection under the LOS alignment condition is satisfied to be implemented in the centre of structural unit; This combiner is emitted on the back of light path controller.
According to above-mentioned optical intelligent antenna, wherein said one group of multimode fiber, a component electro-optical device, one group of PIN photodetector, one group of APD photodetector and one group of LOS logic, their number is identical, and corresponding with the number of receiving element.
The present invention has following useful point compared with prior art:
1) the present invention has been owing to adopted sphere or hemispherical base plate, realized spatial reuse with angular multiplexed to increase the area coverage of communicating by letter.
2) the present invention is owing to receive array with each laser and send out array with laser and be interlaced and filled on whole sphere or the hemisphere face base plate, makes the adjustable extent of light beam size increase and makes once the adjustable number of unit increase that transmits and receives, and improved communication efficiency.
3) the present invention makes each laser transmitting-receiving array make corresponding adjustment according to the real-time status of communicating pair timely owing to adopt the frame mode of the corresponding one group of internal structure unit of each laser transmitting-receiving array.
4) generating laser of emission structural unit of the present invention has been owing to adopted high-power semiconductor laser, thereby is applicable to outdoor large-scale communication environment.
5) the present invention receives the incoming fiber optic of structural unit owing to adopt multimode fiber, and it can satisfy the access way that receives feed into fine, to increase the communication area coverage.
6) the present invention's light path controller of receiving structural unit and emission structural unit can be selected the size of suitable Optical Transmit Unit and laser beam automatically, realizes the intellectuality of optical antenna.
Description of drawings
Fig. 1 is the overall structure figure of the embodiment of the invention 1;
Fig. 2 (a) is the plumb cut figure of the embodiment of the invention 1;
Fig. 2 (b) is the structure chart of emission structural unit in the embodiment of the invention 1;
Fig. 2 (c) is the structure chart that receives structural unit in the embodiment of the invention 1;
Fig. 3 is the overall structure figure of the embodiment of the invention 2;
Fig. 4 (a) is the plumb cut figure of the embodiment of the invention 2;
Fig. 4 (b) is the structure chart of emission structural unit in the embodiment of the invention 2;
Fig. 4 (c) is the structure chart that receives structural unit in the embodiment of the invention 2.
Embodiment
The present invention is described in further detail below in conjunction with the accompanying drawings and the specific embodiments.
Embodiment 1:
The present invention is made up of surface texture and internal structure two parts, respectively as depicted in figs. 1 and 2.
With reference to Fig. 1, surface texture of the present invention comprises that 5 laser are sent out array and 4 laser are received arrays, and each laser is sent out array 4 and is made up of a plurality of transmitter units, and each laser receipts array 5 is made up of a plurality of receiving elements; These laser are sent out array and laser and are received array to be interlaced and filled in a radius be on 5.093 centimetres the sphere base plate 1, form the laser transmitting-receiving array of honeycomb, wherein first laser is sent out array and is comprised 3 transmitter units, be arranged in first row of sphere base plate 1, first laser is received array and is comprised 8 receiving elements, be arranged in second row of sphere base plate 1, second laser is sent out array and is comprised 12 transmitter units, be arranged in the third line of sphere base plate 1, second laser is received array and is comprised 15 receiving elements, be arranged in the fourth line of sphere base plate 1, the 3rd laser is sent out array and is comprised 16 transmitter units, be arranged in the fifth line of sphere base plate 1, the 3rd laser is received array and is comprised 15 receiving elements, be arranged in the 6th row of sphere base plate 1, the 4th laser is sent out array and is comprised 12 transmitter units, be arranged in the 7th row of sphere base plate 1, the 4th laser is received array and is comprised 8 receiving elements, be arranged in the 8th row of sphere base plate 1, the 5th laser is sent out array and is comprised 3 transmitter units, is arranged in the 9th row of base plate sphere.Each transmitter unit 2 adopts six identical prismatics of size with receiving element 3, and the distance of two vertical edges of each six prismatic is 2 centimetres.Wherein, the quantity of laser transmitting-receiving array is to determine according to the size of base plate 1, transmitter unit 2 and receiving element 3.
With reference to Fig. 2, internal structure of the present invention comprises that 4 receive structural unit and 5 emission structural units, these 4 reception structural units are corresponding one by one with described 4 laser receipts array, it is corresponding one by one that 5 emissions structural unit and described 5 laser are sent out array, be that these receive structural unit and the interlacing of emission structural unit is embedded in the cavity of sphere base plate 1, wherein, first emission structural unit is embedded in first row of cavity, first receives second row that structural unit is embedded in cavity, second emission structural unit is embedded in the third line of cavity, second receives the fourth line that structural unit is embedded in cavity, the 3rd emission structural unit is embedded in the fifth line of cavity, the 3rd receives the 6th row that structural unit is embedded in cavity, the 4th emission structural unit is embedded in the 7th row of cavity, the 4th receives the 8th row that structural unit is embedded in cavity, and the 5th emission structural unit is embedded in the 9th row of cavity, shown in Fig. 2 (a).Each receives structural unit 18 and emission structural unit 19 is identical three-dimensional fan-shaped of size, and the fan-shaped radius of each solid is 5.093 centimetres, and its structure is shown in Fig. 2 (b) and Fig. 2 (c).
With reference to Fig. 2 (b), each launches structural unit 19, comprising: semiconductor laser 12, Erbium-Doped Fiber Amplifier 13, optical switch matrix 14, splitter 15 and light path controller 11.Wherein, semiconductor laser 12 is emitted on the rear end of emission structural unit, is used to produce high-power laser signal; Erbium-Doped Fiber Amplifier 13 is located at the front of semiconductor laser 12, is used for the laser signal that amplification semiconductor laser 12 produces; Two optical switch matrix parallel arranged are positioned at the front of Erbium-Doped Fiber Amplifier 13, are used for light path exchange transmitting control information; Light path controller 11 is positioned at the below of these two optical switch matrixes 14, is used for producing control information after receiving the feedback that receives structural unit; The control information of light path controller 11 passes to a plurality of splitters by two optical switch matrixes; Splitter 15 is parallel between two optical switch matrixes, is used for realizing " intelligence " control of laser beam size from choosing any one or a plurality of transmitter unit with emission structural unit 19 corresponding Laser emission arrays.The number of the splitter in each emission structural unit 19 is consistent with the transmitter unit number that the pairing laser of this emission structural unit is sent out array, be that first emission structural unit has 3 splitters, second emission structural unit has 12 splitters, the 3rd emission structural unit has 16 splitters, the 4th emission structural unit has 12 splitters, the 5th emission structural unit has 3 splitters, and these splitters are and are arranged in parallel.
With reference to Fig. 2 (c), each receives structural unit 18, comprising: one group of multimode fiber 6, a component electro-optical device 7, one group of PIN photodetector 8, one group of APD photodetector 9, one group of LOS logical one 0, light path controller 11 and combiner 17; Wherein, multimode fiber 6 is emitted on the front end that receives structural unit, and reception light is realized into the fine receive mode of feed that receives to increase the communication area coverage; Spectroscope 7 is emitted on after the multimode fiber 6, and the light beam that receives is delivered to two different photodetectors respectively; APD photodetector 9 and PIN photodetector 8 lay respectively at spectroscopical upper right side and lower right side, this APD photodetector 9 is used for the baseband signal in opto-electronic conversion and the receiving beam flashlight, and this PIN photo-detector 8 is used for the facula position information of the beacon beam of receiving beam; LOS logical one 0 be emitted on the PIN photodetector after, its analyzes facula position information current value of the beacon beam that receives from PIN photodetector 8, judge whether this facula position information satisfies the LOS alignment condition; Light path controller 11 is emitted on the centre that receives structural unit, aims at following time and produces control signal satisfying LOS, and feed back to the emission structural unit to select suitable transmission antenna unit; Combiner 17 is emitted on the back of light path controller 11, is used to receive the flashlight of all detected wave beams of receiving element.Each receives the number of the multimode fiber, light-dividing device, PIN photodetector, APD photodetector and the LOS logic that are comprised in the structural unit 18, consistent with this receiving element number that receives the pairing laser receipts of structural unit array, promptly first receives structural unit 8 multimode fibers, 8 light-dividing devices, 8 PIN photodetectors, 8 APD photodetectors and 8 LOS logics; Second receives structural unit 15 multimode fibers, 15 light-dividing devices, 15 PIN photodetectors, 15 APD photodetectors and 15 LOS logics is arranged; The 3rd receives structural unit 15 multimode fibers, 15 light-dividing devices, 15 PIN photodetectors, 15 APD photodetectors and 15 LOS logics is arranged; The 4th reception structural unit has 8 multimode fibers, 8 light-dividing devices, 8 PIN photodetectors, 8 APD photodetectors and 8 LOS logics, and they are arranged in parallel in described position respectively.
Embodiment 2
The present invention is made up of surface texture and internal structure two parts, respectively as shown in Figure 3 and Figure 4.
With reference to Fig. 3, surface texture of the present invention comprises that 3 laser are sent out array and 2 laser are received arrays, and each laser is sent out array 23 and is made up of a plurality of transmitter units, and each laser receipts array 24 is made up of a plurality of receiving elements; These laser are sent out array and laser and are received array to be interlaced and filled in a radius be on 5.093 centimetres the hemisphere face base plate 20, form the laser transmitting-receiving array of honeycomb, wherein first laser is sent out array and is comprised 3 transmitter units, be arranged in first row of hemisphere face base plate 20, first laser is received array and is comprised 8 receiving elements, be arranged in second row of hemisphere face base plate 20, second laser is sent out array and is comprised 12 transmitter units, be arranged in the third line of hemisphere face base plate 20, second laser is received array and is comprised 15 receiving elements, be arranged in the fourth line of hemisphere face base plate 20, the 3rd laser is sent out array and is comprised 16 transmitter units, is arranged in the fifth line of hemisphere face base plate 20.Each transmitter unit 21 adopts the identical circle of size with receiving element 22, and each diameter of a circle is 2 centimetres.Wherein, the quantity of laser transmitting-receiving array is determined according to the size of base plate 20, transmitter unit 21 and receiving element 22.
With reference to Fig. 4, internal structure of the present invention comprises that 2 receive structural unit and 3 emission structural units, these 2 reception structural units are corresponding one by one with described 2 laser receipts array, it is corresponding one by one that 3 emissions structural unit and described 3 laser are sent out array, be that these receive structural unit and the interlacing of emission structural unit is embedded in the cavity of hemisphere face base plate 20, wherein, first emission structural unit is embedded in first row of cavity, first receives second row that structural unit is embedded in cavity, second emission structural unit is embedded in the third line of cavity, second receives the fourth line that structural unit is embedded in cavity, the 3rd emission structural unit is embedded in the fifth line of cavity, shown in Fig. 4 (a).Each receives structural unit 18 and emission structural unit 19 be big or small identical three-dimensional fan-shaped, and the fan-shaped radius of each solid is 5.093 centimetres, and its structure is shown in Fig. 4 (b) and Fig. 4 (c).
With reference to Fig. 4 (b), each launches structural unit 19, comprising: semiconductor laser 12, Erbium-Doped Fiber Amplifier 13, optical switch matrix 14, splitter 15 and light path controller 11.Wherein, semiconductor laser 12 is emitted on the rear end of emission structural unit, is used to produce high-power laser signal; Erbium-Doped Fiber Amplifier 13 is located at the front of semiconductor laser 12, is used for the laser signal that amplification semiconductor laser 12 produces; Two optical switch matrix parallel arranged are positioned at the front of Erbium-Doped Fiber Amplifier 13, are used for light path exchange transmitting control information; Light path controller 11 is positioned at the below of these two optical switch matrixes 14, is used for producing control information after receiving the feedback that receives structural unit; The control information of light path controller 11 passes to a plurality of splitters by two optical switch matrixes; Splitter 15 is parallel between two optical switch matrixes, is used for realizing " intelligence " control of laser beam size from choosing any one or a plurality of transmitter unit with emission structural unit 19 corresponding Laser emission arrays.The number of the splitter in each emission structural unit 19 is consistent with the transmitter unit number that the pairing laser of this emission structural unit is sent out array, be that first emission structural unit has 3 splitters, second emission structural unit has 12 splitters, the 3rd emission structural unit has 16 splitters, and these splitters are and are arranged in parallel.
With reference to Fig. 4 (c), each receives structural unit 18, comprising: one group of multimode fiber 6, a component light
Install 7, one groups of PIN photodetectors 8, one group of APD photodetector 9, one group of LOS logical one 0, light path controller 11 and combiner 17; Wherein, multimode fiber 6 is emitted on the front end that receives structural unit, and reception light is realized into the fine receive mode of feed that receives to increase the communication area coverage; Spectroscope 7 is emitted on after the multimode fiber 6, and the light beam that receives is delivered to two different photodetectors respectively; APD photodetector 9 and PIN photodetector 8 lay respectively at spectroscopical upper right side and lower right side, this APD photodetector 9 is used for the baseband signal in opto-electronic conversion and the receiving beam flashlight, and this PIN photo-detector 8 is used for the facula position information of the beacon beam of receiving beam; LOS logical one 0 be emitted on the PIN photodetector after, its analyzes facula position information current value of the beacon beam that receives from PIN photodetector 8, judge whether this facula position information satisfies the LOS alignment condition; Light path controller 11 is emitted on the centre that receives structural unit, aims at following time and produces control signal satisfying LOS, and feed back to the emission structural unit to select suitable transmission antenna unit; Combiner 17 is emitted on the back of light path controller 11, is used to receive the flashlight of all detected wave beams of receiving element.Each receives the number of the multimode fiber, light-dividing device, PIN photodetector, APD photodetector and the LOS logic that are comprised in the structural unit 18, consistent with this receiving element number that receives the pairing laser receipts of structural unit array, promptly first receives structural unit 8 multimode fibers, 8 light-dividing devices, 8 PIN photodetectors, 8 APD photodetectors and 8 LOS logics; Second reception structural unit has 15 multimode fibers, 15 light-dividing devices, 15 PIN photodetectors, 15 APD photodetectors and 15 LOS logics, and they are arranged in parallel in described position respectively.
More than two embodiment do not constitute any limitation of the invention, obviously under thought of the present invention, anyone can make the change of different parameters and structure, but these are all at the row of protection scope of the present invention.
Claims (9)
1. optical intelligent antenna that is used for rapidly moving free space optical communication system, the internal structures of group more than comprising unit, base plate, a plurality of laser receipts array and a plurality of laser are sent out array, every group of internal structure unit is embedded in the cavity of base plate, it is characterized in that: base plate (1) be shaped as sphere or hemisphere face; Each laser is received arrays (5) and is sent out array (4) with laser and be interlaced and filled on whole sphere or the hemisphere face base plate, forms the laser transmitting-receiving array of honeycomb, the corresponding one group of internal structure unit of each laser transmitting-receiving array.
2. optical intelligent antenna according to claim 1 is characterized in that: each laser is received array and is formed (3) by the delegation's receiving element that is arranged on the base plate, and each laser is sent out array and is made up of the delegation's transmitter unit (2) that is arranged on the base plate.
3. optical intelligent antenna according to claim 1 is characterized in that: the quantity of laser transmitting-receiving array is determined according to the size of the size of base plate (1) and emission, receiving element.
4. optical intelligent antenna according to claim 1 is characterized in that every group of internal structure unit comprises an emission structural unit (18) and a reception structural unit (19), and being shaped as of each structural unit is three-dimensional fan-shaped.
5. optical intelligent antenna according to claim 1 is characterized in that: transmitter unit (2) adopts identical six prismatics or the circular configuration of volume with receiving element (3).
6. optical intelligent antenna according to claim 1 is characterized in that: each emission structural unit (18) comprises semiconductor laser (12), Erbium-Doped Fiber Amplifier (13), two optical switch matrixes, a plurality of splitter and light path controllers (11); Described two optical switch matrixes are emitted on the front end of emission structural unit, and described a plurality of splitters are parallel between two optical switch matrixes; Described light path controller (11) is positioned at the below of two optical switch matrixes, is used to control the size of laser beam; Described Erbium-Doped Fiber Amplifier (13) and semiconductor laser (12) front and rear row are placed on the back of second optical switch matrix, are used to launch laser.
7. optical intelligent antenna according to claim 1 is characterized in that: described a plurality of splitters, its number is corresponding with transmitter unit (2).
8. optical intelligent antenna according to claim 1, it is characterized in that: each receives structural unit (19), comprising: one group of multimode fiber, a component electro-optical device, one group of PIN photodetector, one group of APD photodetector, one group of LOS logic, light path controller (11) and combiner (19); The front end that is emitted on reception structural unit (19) of described multimode fiber (6) makes to receive the receive mode that light realizes receiving into fibre feed; Described spectroscope (7) is emitted on after the multimode fiber, and described APD photodetector (9) and PIN photodetector (8) lay respectively at the upper right side and the lower right side of spectroscope (7); Described LOS logic (10) be emitted on PIN photodetector (8) after, be used for the facula position information current value of the beacon beam that receives is analyzed; Described light path controller (11) is emitted on the centre that receives structural unit (19), satisfies the suitable light transmission antenna unit of selection under the LOS alignment condition to be implemented in; Described combiner (17) is emitted on the back of light path controller (11).
9. optical intelligent antenna according to claim 7, it is characterized in that: described one group of multimode fiber, a component electro-optical device, one group of PIN photodetector, one group of APD photodetector and one group of LOS logic, their number is identical, and corresponding with the number of receiving element (3).
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| CN102571204A (en) * | 2011-12-09 | 2012-07-11 | 西安电子科技大学 | Optical transmitting antenna system and beam control method thereof |
| CN102694591A (en) * | 2012-05-30 | 2012-09-26 | 西安电子科技大学 | Cylindrical optical intelligent antenna for 360-degree moving of FSO (free space optical communication) system in approximate plane |
| CN102739274A (en) * | 2011-03-31 | 2012-10-17 | 索尼公司 | Radio communication system |
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| CN108390715A (en) * | 2018-04-20 | 2018-08-10 | 宁波光舟通信技术有限公司 | A kind of terminal layout structure of laser beam communications satellite |
| CN110221318A (en) * | 2019-03-18 | 2019-09-10 | 上海微小卫星工程中心 | A kind of satellite antenna and satellite navigation signal enhancement method |
| CN112490690A (en) * | 2019-09-11 | 2021-03-12 | 英业达科技有限公司 | Antenna structure and operation method thereof |
| CN113794514A (en) * | 2021-08-23 | 2021-12-14 | 中国电子科技集团公司电子科学研究院 | Free space laser communication receiving device |
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