CN116111337A - Reconfigurable reflective array antenna with adjustable polarization and scannable wave beam - Google Patents

Abstract

The invention discloses a reconfigurable reflective array antenna with adjustable polarization and scannable wave beams, which is characterized in that on the basis of a reconfigurable reflective array antenna with independent dynamic scanning of double circular polarization, double circular polarization wave beams are directed in the same direction and overlapped, and linear polarization wave beams can be synthesized. Furthermore, it is proposed to adjust the reference phase constant of the aperture plane to change the phase difference of the dual circularly polarized beam so as to adjust the polarization direction of the linearly polarized beam. By using the method, arbitrary linear polarization of the direction can be generated, and dynamic beam scanning can be realized. The method is verified by taking a 1-bit double circular polarization reconfigurable reflection array of 16 x 16 as an example, and the generation and dynamic switching of any linear polarization are realized on the basis of beam dynamic scanning. The technology provided by the invention can solve the problem of polarization mismatch in satellite communication, and has wide application prospects in the fields of satellite communication, ground communication and the like.

Description

Reconfigurable reflective array antenna with adjustable polarization and scannable wave beam

Technical Field

The invention relates to the technical field of antenna engineering, in particular to a reconfigurable reflective array antenna with adjustable polarization and scannable wave beams.

Background

In wireless communication, an antenna is an indispensable energy transmitting and receiving device. The high gain antenna can focus the energy and increase the channel capacity. The high gain antenna capable of dynamically scanning the wave beam plays an important role in the key fields of mobile communication, satellite communication, communication in motion and the like. In recent years, reconfigurable reflective array antennas have been increasingly used due to low cost and high gain. The generation of linearly polarized beams is relatively simple and widely adopted in mobile communication and satellite communication. However, as the terminal or satellite moves and rotates, the linear polarization direction will also rotate accordingly. To maximize efficiency, the transmitting or receiving end typically performs polarization tracking so that the transmitted and received polarizations match. The conventional polarization tracking method is a mechanical rotation method, but this requires a complicated servo system and high cost, and the polarization switching speed is slow.

Disclosure of Invention

The present invention aims to solve at least one of the technical problems in the related art to some extent.

Aiming at the problems that linear polarization is difficult to match, a mechanical servo system is high in cost, switching speed is low, simultaneous dynamic switching of polarization and wave beams is difficult, and the like in the prior art, the invention provides a reconfigurable reflection array antenna with adjustable polarization and scannable wave beams. The method aims at generating reconfigurable beams with arbitrary linear polarization in an electric control mode, can solve the problem of polarization mismatch in satellite communication, and has wide application prospects in the fields of satellite communication, ground communication and the like.

In order to achieve the above object, according to one aspect of the present invention, there is provided a reconfigurable reflective array antenna with adjustable polarization and scannable beam, comprising a linearly polarized feed horn and a reconfigurable array, wherein,

the reconfigurable array comprises a plurality of reconfigurable reflective array antenna units which are periodically and equidistantly arranged;

the reconfigurable reflective array antenna unit comprises a dielectric plate, a radiation device and a metal reflecting plate, wherein the dielectric plate is positioned between the radiation device and the metal reflecting plate;

the radiation device comprises a passive radiation structure and a reconfigurable device;

the reconfigurable devices are used for independently controlling the state of each reconfigurable device through control lines so as to control the radiation phase of the reconfigurable reflective array antenna unit.

The polarization-adjustable and beam-scannable reconfigurable reflective array antenna implemented by the invention can also have the following additional technical characteristics:

further, the state of the reconfigurable reflective array antenna unit is used for responding to the incident electromagnetic waves of the left-hand circular polarization and the right-hand circular polarization independently; for the left-hand circularly polarized and right-hand circularly polarized incident electromagnetic waves, at least two reflection phases are respectively provided, wherein the phase difference of the two states is 180 degrees.

Further, the reconfigurable array is used for independently shifting and reflecting the same-frequency incident electromagnetic waves of left-hand circular polarization and right-hand circular polarization to obtain two independent high-gain circular polarization beams.

Further, by changing the state of the reconfigurable array, independent beam scanning is performed on the reflected waves of the left-hand circular polarization and the right-hand circular polarization.

Further, the state of the reconfigurable reflective array antenna unit directs the two reflected waves of the left-hand circular polarization and the right-hand circular polarization in the same direction; the polarization in the same direction is linear polarization based on left-hand circular polarization and right-hand circular polarization.

Further, by changing the reference phase constant of the reconfigurable reflective array antenna unit, the corresponding beam phase is changed.

Further, for the left-hand circular polarization and right-hand circular polarization beams of the same direction, the reference phase constant is independently changed and the phase difference of the two beams of the rotation direction is changed so as to change the polarization direction of the linear polarization.

Further, by independently scanning the beam's pointing direction, the polarization direction of the linear polarization is independently changed.

The reconfigurable reflective array antenna with the adjustable polarization and scannable wave beams can solve the problem of polarization mismatch in satellite communication and has wide application prospects in the fields of satellite communication, ground communication and the like.

Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.

Drawings

The foregoing and/or additional aspects and advantages of the invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings, in which:

FIG. 1 is a schematic diagram of a dual circularly polarized reconfigurable reflective array of the present invention;

FIG. 2 is a schematic diagram of the synthesis of linear polarization by dual circular polarization according to the present invention;

FIG. 3 is a schematic diagram of simulation verification results of the present invention for adjusting the phase of a far-field beam by adjusting the phase constant;

FIG. 4 is a schematic diagram of the present invention for changing the direction of dual circularly polarized composite linear polarization by adjusting the phase constant;

FIG. 5 is a far field pattern at 0 degree beam pointing for the resultant 90 degree vertical line polarization of the present invention;

FIG. 6 is a far field pattern at 0 degree beam pointing for the synthesized 0 degree horizontal linear polarization of the present invention;

FIG. 7 is a far field pattern at 0 degree beam pointing when synthesizing 45 degree linear polarizations of the present invention;

fig. 8 is a far field pattern at-15 degrees beam pointing when 45 degrees linear polarization is synthesized in accordance with the present invention.

Detailed Description

It should be noted that, without conflict, the embodiments of the present invention and features of the embodiments may be combined with each other. The invention will be described in detail below with reference to the drawings in connection with embodiments.

In order that those skilled in the art will better understand the present invention, a technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in which it is apparent that the described embodiments are only some embodiments of the present invention, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the present invention without making any inventive effort, shall fall within the scope of the present invention.

A polarization tunable and beam scannable reconfigurable reflective array antenna according to an embodiment of the present invention is described below with reference to the accompanying drawings.

As shown in fig. 1, on the basis of the reconfigurable reflective array antenna of dual circular polarization independent dynamic scanning, dual circular polarization beams are directed in the same direction and superimposed to synthesize a linear polarization beam. The antenna comprises a linear polarization feed source loudspeaker 1 and a reconfigurable array 4, wherein the reconfigurable array 4 comprises M multiplied by N reconfigurable reflection array antenna units 5 which are periodically arranged at equal intervals, and M and N are integers larger than 2; the reconfigurable reflective array antenna unit 5 comprises a dielectric plate, a radiation device and a metal reflecting plate, wherein a dielectric is arranged between the radiation device and the metal reflecting plate; the radiation device comprises a passive radiation structure and a reconfigurable device; the reconfigurable devices can independently control the state of each reconfigurable device through control lines to control the radiation phase of the reconfigurable reflective array antenna unit 5.

Further, the states of the reconfigurable reflective array antenna unit 5 are at least 4, and the reconfigurable reflective array antenna unit can respond to the incident electromagnetic waves with left-hand circular polarization and right-hand circular polarization independently. For the left-hand circularly polarized wave, at least two reflection phases exist, wherein the phase difference of the two states is 180 degrees; for right-hand circularly polarized waves, there are at least two reflection phases, wherein the phase difference between the two states is 180 degrees.

Further, the reconfigurable array 4 can independently shift and reflect the same-frequency incident waves of the left-hand circular polarization and the right-hand circular polarization to form two independent high-gain circular polarization beams. By changing the state of the reconfigurable array 4, independent beam scanning can be performed on the two rotated reflected waves.

Further, controlling the states of all cells on the array, two reflected waves can be directed in the same direction. Since the left-hand circular polarization and the right-hand circular polarization can synthesize linear polarization, the polarization in this direction is linear polarization.

Further, the reference phase constant of the reconfigurable reflective array antenna unit 5 is uniformly changed, the beam pointing is not affected, but the beam phase is changed. For the same-directional left-hand circularly polarized and right-hand circularly polarized beams described above, the reference phase constant can be independently changed to change the phase difference of the two rotationally directed beams, thereby changing the polarization direction of the resultant linear polarization.

Further, the beam direction can be scanned independently and the polarization direction of the linear polarization can be changed independently.

Specifically, the double circularly polarized reconfigurable reflective array of the invention is shown in FIG. 1. Comprises a linear polarization feed horn 1, and a radiation line polarization electromagnetic wave 2 is incident on a reconfigurable array 4. And integrating M multiplied by N reconfigurable reflective array antenna units 5 which are periodically and equidistantly arranged on the reconfigurable array. The reflection unit is independently responsive to two circular polarizations and performs at least 1-bit phase adjustment for each circular polarization. The incident polarized electromagnetic wave 2 can be decomposed into two circularly polarized electromagnetic waves. After the regulation and control of the reconfigurable array, two high-gain beam emergence can be formed. By controlling the state of each element, the beam pointing can be changed, realizing two circular polarization reconfigurations.

Further, the reconfigurable reflective array antenna line further includes a reflected linearly polarized electromagnetic wave 3.

As shown in fig. 2, the left graph represents that the dual circularly polarized reconfigurable reflective array can independently respond to two circularly polarized beams with different handedness, and perform beam scanning on the two circularly polarized beams. As shown in the graph of fig. 2, if two circularly polarized incident electromagnetic waves of different handedness come from the same direction, one linearly polarized incident wave can be synthesized; if two circularly polarized reflected beams of different handedness are aligned in one direction, the energies are approximately equal, so that in this direction, the two circular polarizations can be combined into one linearly polarized electromagnetic wave. Further, as shown in the right diagram of fig. 2, the adjustment of the linear polarization direction can be achieved at the position pointed by the designated beam by adjusting the relative phases of the two circular polarizations.

The way to control the absolute phase of a single beam is to change the reference phase constant of the array element. Wherein changing the phase constant does not change the beam pointing, nor does it substantially affect the gain. As shown in fig. 3, an array of 16×16 is chosen as an example for verification. Changing the phase constant can change the far-field beam phase almost linearly.

For two circular polarizations, their relative phase difference can be adjusted by a phase constant. As shown in fig. 4, if the phase constant of the right circular polarization is fixed, as an example, the beam phase of the left circular polarization is changed. It can be seen that when the relative phase difference is 0 degrees, two circular polarizations can be combined into a vertical polarization; when the relative phase difference is 180 degrees, two circular polarizations can be combined into a horizontal polarization; when the relative phase difference is 90 degrees, the two circular polarizations can be combined into 45-degree polarization … …, and the linear polarization direction can be adjusted by changing the phase difference of the double circular polarizations.

Further, fig. 5, 6, 7 and 8 verify the technical idea of the present invention, that is, polarization can be adjusted and beam can be scanned, by simulation examples. Fig. 5 is a far field pattern when 90 degrees vertical line polarization is synthesized when the beam is directed at 0 degrees. At this time, the phase difference of the two circular polarizations is 0 degrees, and there is no horizontal cross polarization. Fig. 6 is a far field pattern when synthesizing 0 degree horizontal linear polarization when the beam is directed at 0 degrees. At this time, the phase difference of the two circular polarizations is 180 degrees, and there is no vertical cross polarization. Fig. 7 is a far field pattern when 45 degree linear polarization is synthesized when the beam is directed at 0 degrees. At this time, the circularly polarized phase difference was selected to be 90 degrees. The main polarization is 45-degree linear polarization, and the cross polarization is-45-degree linear polarization. The cross polarization level is low, and the fact that the linear polarization direction can be independently reconfigurable is verified.

Further, fig. 8 further illustrates beam scanning performance when polarization is reconfigurable by taking-15 degrees beam scanning as an example, and it can be seen that the beam is directed to-15 degrees, and at the same time, the main polarization direction is 45 degrees, and the cross polarization level is very low. Thereby verifying that the beam pointing can be scanned.

According to the embodiment of the invention, the reconfigurable reflective array antenna with adjustable polarization and scannable wave beams can solve the problem of polarization mismatch in wireless communication. And simultaneously carrying out beam scanning and polarization scanning in an electric control mode, so that the beams are aligned and the polarizations are matched. Is suitable for both ground communication and satellite communication, and has higher market application potential.

It should be noted that the computer readable medium described in the present disclosure may be a computer readable signal medium or a computer readable storage medium, or any combination of the two. The computer readable storage medium can be, for example, but not limited to, an electronic, magnetic, optical, electromagnetic, infrared, or semiconductor system, apparatus, or device, or a combination of any of the foregoing. More specific examples of the computer-readable storage medium may include, but are not limited to: an electrical connection having one or more wires, a portable computer diskette, a hard disk, a Random Access Memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber, a portable compact disc read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination of the foregoing. In the context of this disclosure, a computer-readable storage medium may be any tangible medium that can contain, or store a program for use by or in connection with an instruction execution system, apparatus, or device. In the present disclosure, however, the computer-readable signal medium may include a data signal propagated in baseband or as part of a carrier wave, with the computer-readable program code embodied therein. Such a propagated data signal may take any of a variety of forms, including, but not limited to, electro-magnetic, optical, or any suitable combination of the foregoing. A computer readable signal medium may also be any computer readable medium that is not a computer readable storage medium and that can communicate, propagate, or transport a program for use by or in connection with an instruction execution system, apparatus, or device. Program code embodied on a computer readable medium may be transmitted using any appropriate medium, including but not limited to: electrical wires, fiber optic cables, RF (radio frequency), and the like, or any suitable combination of the foregoing.

The computer readable medium may be contained in the electronic device; or may exist alone without being incorporated into the electronic device. The computer readable medium carries one or more programs which, when executed by the electronic device, cause the electronic device to perform a method for measuring the sediment content in a flowing water body according to the above embodiment.

Computer program code for carrying out operations of the present disclosure may be written in one or more programming languages, including an object oriented programming language such as Java, smalltalk, C ++ and conventional procedural programming languages, such as the "C" programming language or similar programming languages. The program code may execute entirely on the user's computer, partly on the user's computer, as a stand-alone software package, partly on the user's computer and partly on a remote computer or entirely on the remote computer or server. In the case of a remote computer, the remote computer may be connected to the user's computer through any kind of network, including a Local Area Network (LAN) or a Wide Area Network (WAN), or may be connected to an external computer (for example, through the Internet using an Internet service provider).

In the description of the present specification, a description referring to terms "one embodiment," "some embodiments," "examples," "specific examples," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present application. In this specification, schematic representations of the above terms are not necessarily directed to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, the different embodiments or examples described in this specification and the features of the different embodiments or examples may be combined and combined by those skilled in the art without contradiction.

Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In the description of the present application, the meaning of "plurality" is at least two, such as two, three, etc., unless explicitly defined otherwise.

Any process or method descriptions in flow charts or otherwise described herein may be understood as representing modules, segments, or portions of code which include one or more executable instructions for implementing specific logical functions or steps of the process, and further implementations are included within the scope of the preferred embodiment of the present application in which functions may be executed out of order from that shown or discussed, including substantially concurrently or in reverse order, depending on the functionality involved, as would be understood by those reasonably skilled in the art of the embodiments of the present application.

Logic and/or steps represented in the flowcharts or otherwise described herein, e.g., a ordered listing of executable instructions for implementing logical functions, can be embodied in any computer-readable medium for use by or in connection with an instruction execution system, apparatus, or device, such as a computer-based system, processor-containing system, or other system that can fetch the instructions from the instruction execution system, apparatus, or device and execute the instructions. For the purposes of this description, a "computer-readable medium" can be any means that can contain, store, communicate, propagate, or transport the program for use by or in connection with the instruction execution system, apparatus, or device. More specific examples (a non-exhaustive list) of the computer-readable medium would include the following: an electrical connection (electronic device) having one or more wires, a portable computer diskette (magnetic device), a Random Access Memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber device, and a portable compact disc read-only memory (CDROM). Additionally, the computer-readable medium may even be paper or other suitable medium upon which the program is printed, as the program may be electronically captured, via, for instance, optical scanning of the paper or other medium, then compiled, interpreted or otherwise processed in a suitable manner, if necessary, and then stored in a computer memory.

It is to be understood that portions of the present application may be implemented in hardware, software, firmware, or a combination thereof. In the above-described embodiments, the various steps or methods may be implemented in software or firmware stored in a memory and executed by a suitable instruction execution system. For example, if implemented in hardware, as in another embodiment, may be implemented using any one or combination of the following techniques, as is well known in the art: discrete logic circuits having logic gates for implementing logic functions on data signals, application specific integrated circuits having suitable combinational logic gates, programmable Gate Arrays (PGAs), field Programmable Gate Arrays (FPGAs), and the like.

Those of ordinary skill in the art will appreciate that all or a portion of the steps carried out in the method of the above-described embodiments may be implemented by a program to instruct related hardware, where the program may be stored in a computer readable storage medium, and where the program, when executed, includes one or a combination of the steps of the method embodiments.

In addition, each functional unit in each embodiment of the present application may be integrated in one processing module, or each unit may exist alone physically, or two or more units may be integrated in one module. The integrated modules may be implemented in hardware or in software functional modules. The integrated modules may also be stored in a computer readable storage medium if implemented as software functional modules and sold or used as a stand-alone product.

The above-mentioned storage medium may be a read-only memory, a magnetic disk or an optical disk, or the like. Although embodiments of the present application have been shown and described above, it will be understood that the above embodiments are illustrative and not to be construed as limiting the application, and that variations, modifications, alternatives, and variations may be made to the above embodiments by one of ordinary skill in the art within the scope of the application.

Claims (8)

1. A reconfigurable reflective array antenna with adjustable polarization and scannable wave beam is characterized by comprising a linear polarization feed source loudspeaker and a reconfigurable array, wherein,

the reconfigurable array comprises a plurality of reconfigurable reflective array antenna units which are periodically and equidistantly arranged;

the reconfigurable reflective array antenna unit comprises a dielectric plate, a radiation device and a metal reflecting plate, wherein the dielectric plate is positioned between the radiation device and the metal reflecting plate;

the radiation device comprises a passive radiation structure and a reconfigurable device;

the reconfigurable devices are used for independently controlling the state of each reconfigurable device through control lines so as to control the radiation phase of the reconfigurable reflective array antenna unit.

2. The reconfigurable reflective array antenna of claim 1, wherein the reconfigurable reflective array antenna elements are configured to respond independently to left-hand circularly polarized and right-hand circularly polarized incident electromagnetic waves; for the left-hand circularly polarized and right-hand circularly polarized incident electromagnetic waves, at least two reflection phases are respectively provided, wherein the phase difference of the two states is 180 degrees.

3. The reconfigurable reflective array antenna of claim 2, wherein the reconfigurable array is configured to independently phase shift and reflect co-frequency incident electromagnetic waves of left-hand circular polarization and right-hand circular polarization to obtain two independent high-gain circular polarized beams.

4. A reconfigurable reflective array antenna according to claim 3, independent beam scanning of the left-hand and right-hand circularly polarized reflected waves is performed by changing the state of the reconfigurable array.

5. The reconfigurable reflective array antenna of claim 4, wherein the state of the reconfigurable reflective array antenna element directs the two reflected waves of the left-hand circular polarization and the right-hand circular polarization in the same direction; the polarization in the same direction is linear polarization based on left-hand circular polarization and right-hand circular polarization.

6. The reconfigurable reflective array antenna of claim 5, wherein the corresponding beam phase is changed by changing a reference phase constant of the reconfigurable reflective array antenna element.

7. The reconfigurable reflective array antenna of claim 6, wherein for the same-pointing left-hand and right-hand circularly polarized beams, a reference phase constant is independently changed and a phase difference of the two-hand beams is changed to change a polarization direction of the linear polarization.

8. The reconfigurable reflective array antenna of claim 7, wherein the polarization direction of the linear polarization is independently changed by independently scanning the direction of the beams.

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