阅读说明：本技术 用于增强室内信号覆盖的三维oam天线架构实现方法及系统 (Three-dimensional OAM antenna architecture implementation method and system for enhancing indoor signal coverage ) 是由 周晨虹 阳堃 赖峥嵘 于 2021-09-24 设计创作，主要内容包括：本发明公开了一种用于增强室内信号覆盖的三维OAM天线架构实现方法,该方法包括：将天线阵元按照预置的排布规律设置在三维图形顶点上形成天线阵元之间的几何关系；根据天线阵元之间的几何关系将天线阵元划分为多个子阵列；对天线阵元统一进行相位激励,使得多个子阵列分别产生不同模态的涡旋电磁波以使每个子阵列辐射一个方向。根据本发明公开的方法及系统能够实现多个方位的信号覆盖,有效扩展了室内场景中OAM信号覆盖范围。(The invention discloses a method for realizing a three-dimensional OAM antenna architecture for enhancing indoor signal coverage, which comprises the following steps: arranging the antenna array elements on the top point of the three-dimensional graph according to a preset arrangement rule to form a geometric relation between the antenna array elements; dividing the antenna array elements into a plurality of sub-arrays according to the geometric relation among the antenna array elements; the antenna array elements are uniformly subjected to phase excitation, so that a plurality of sub-arrays respectively generate vortex electromagnetic waves with different modes, and each sub-array radiates in one direction. According to the method and the system disclosed by the invention, signal coverage of multiple directions can be realized, and the OAM signal coverage range in an indoor scene is effectively expanded.)

1. A method for implementing a three-dimensional OAM antenna architecture for enhancing indoor signal coverage, the method comprising:

arranging the antenna array elements on the top point of the three-dimensional graph according to a preset arrangement rule to form a geometric relation between the antenna array elements;

dividing the antenna array elements into a plurality of sub-arrays according to the geometric relation among the antenna array elements;

and uniformly carrying out phase excitation on the antenna array elements, so that the plurality of sub-arrays respectively generate vortex electromagnetic waves with different modes to enable each sub-array to radiate in one direction.

2. The method of claim 1, wherein the three-dimensional graph includes a sphere, and the arranging the antenna elements on the vertices of the three-dimensional graph according to a preset arrangement rule to form a geometric relationship between the antenna elements includes:

the antenna array elements are arranged to be evenly distributed on a first circumference and a second circumference which are vertical to a spherical z-axis;

and forming uniformly-arranged sub-arrays according to the antenna array elements arranged on the first circumference and the second circumference.

3. The method of claim 2, wherein the eight subarrays are used for phase-exciting the antenna elements uniformly, so that the plurality of subarrays generate vortex electromagnetic waves with different modes respectively, and each subarray radiates in one direction, and the method includes:

generating thirty-two paths of shunt signals with phase excitation by an input signal through a four-power divider, a phase shifter and an eight-power divider;

feeding back the thirty-two branch signals with phase excitation to eight sub-arrays, so that the eight sub-arrays generate the vortex electromagnetic wave.

4. The method of claim 1, wherein the three-dimensional figure comprises a solid octagon, and the arranging the antenna elements on the vertices of the three-dimensional figure according to a preset arrangement rule to form a geometric relationship between the antenna elements comprises:

arranging antenna array elements to be distributed on a first circumference and a second circumference which are vertical to a spherical z-axis;

forming uniformly distributed sub-arrays according to the antenna array elements arranged on the first circumference and the second circumference;

the three-dimensional octagon comprises two regular octagons with the side lengths of the upper surface and the lower surface equal to the height of the three-dimensional octagon, the side surfaces are eight squares, and the circumscribed circles of the two regular octagons are respectively superposed with the first circumference and the second circumference.

5. The method according to claim 4, wherein the antenna elements include a first number antenna element, a second number antenna element, a third number antenna element, and a fourth number antenna element, and the antenna elements are phase-excited uniformly so that the sub-arrays respectively generate vortex electromagnetic waves of different modes to radiate each sub-array in one direction, and the method includes:

dividing an input signal into four paths through a four-way power divider to generate a first signal, a second signal, a third signal and a fourth signal;

the first signal is sequentially passed through a first phase shifter and a four-way power divider to generate four first branch signals with same phase excitation;

feeding back the four paths of first branch signals with the same phase excitation to the antenna array element with the first number;

the second signal sequentially passes through a second phase shifter and a four-way power divider to generate four paths of second shunt signals with same phase excitation;

feeding back the four paths of second branch signals with the same phase excitation to the antenna array elements with the second number;

the third signal sequentially passes through a third phase shifter and a four-way power divider to generate four paths of third branch signals with same phase excitation;

feeding back the four third branch signals with the same phase excitation to an antenna array element with a third number;

the fourth signal sequentially passes through a fourth phase shifter and a four-power divider to generate four paths of fourth branch signals with same phase excitation;

feeding back the four paths of fourth branch signals with the same phase excitation to an antenna array element with a fourth number;

and enabling the subarray formed by the four array elements which are arranged anticlockwise to radiate the first vortex electromagnetic wave, and enabling the subarray which is arranged clockwise to radiate the second vortex electromagnetic wave.

6. A three-dimensional OAM antenna architecture system for enhancing indoor signal coverage, the system comprising:

the arrangement configuration module is used for arranging the antenna array elements on the top point of the three-dimensional graph according to a preset arrangement rule to form a geometric relation among the antenna array elements;

the dividing module is used for dividing the antenna array elements into a plurality of sub-arrays according to the geometric relation among the antenna array elements;

and the full-coverage module is used for carrying out phase excitation on the antenna array elements uniformly, so that the plurality of sub-arrays generate vortex electromagnetic waves with different modes respectively to enable each sub-array to radiate in one direction.

7. The three-dimensional OAM antenna architecture system for enhancing indoor signal coverage as recited in claim 6, wherein said three-dimensional figure comprises a sphere, said arrangement configuration module implemented as:

the antenna array elements are arranged to be evenly distributed on a first circumference and a second circumference which are vertical to a spherical z-axis;

and forming uniformly-arranged sub-arrays according to the antenna array elements arranged on the first circumference and the second circumference.

8. The three-dimensional OAM antenna architecture system for enhancing indoor signal coverage of claim 7, wherein the sub-arrays are eight, the full coverage module comprising:

a four-power divider, a phase shifter and an eight-power divider;

the four-power divider, the phase shifter and the eight-power divider are used for generating thirty-two paths of shunt signals with phase excitation from input signals;

and the feedback unit is used for feeding back the thirty-two branch signals with phase excitation to the eight subarrays so that the eight subarrays generate the vortex electromagnetic waves.

9. The three-dimensional OAM antenna architecture system for enhancing indoor signal coverage as recited in claim 6, wherein said three-dimensional figure comprises a solid octagon, said arrangement configuration module implemented as:

arranging antenna array elements to be distributed on a first circumference and a second circumference which are vertical to a spherical z-axis;

forming uniformly distributed sub-arrays according to the antenna array elements arranged on the first circumference and the second circumference;

the three-dimensional octagon comprises two regular octagons with the side lengths of the upper surface and the lower surface equal to the height of the three-dimensional octagon, the side surfaces are eight squares, and the circumscribed circles of the two regular octagons are respectively superposed with the first circumference and the second circumference.

10. The three-dimensional OAM antenna architecture system for enhancing indoor signal coverage of claim 6, wherein the sub-arrays are eight, the full coverage module comprising:

two four-power dividers, a phase shifter and an eight-power divider;

the four-way power divider, the phase shifter and the eight-way power divider are used for respectively generating eight paths of branch signals with phase excitation from the first signal/the second signal/the third signal/the fourth signal;

the feedback unit is used for feeding the shunt signal with the phase excitation back to the four sub-arrays which are arranged anticlockwise/clockwise, so that the four sub-arrays which are arranged clockwise generate a first vortex electromagnetic wave/the four sub-arrays which are arranged anticlockwise generate a second vortex electromagnetic wave signal.

Technical Field

The invention relates to the technical field of antennas, in particular to a method and a system for realizing a three-dimensional OAM antenna architecture for enhancing indoor signal coverage.

Background

Orbital Angular Momentum (OAM) is a novel communication multiplexing dimension independent of traditional modulation degrees of freedom such as time, frequency and the like, theoretically has an infinite dimensional hilbert space, and has the potential of improving system capacity and spectrum utilization rate. Electromagnetic waves carrying orbital angular momentum are called vortex electromagnetic waves. The vortex electromagnetic wave has the characteristics of unique spiral phase position, hollow strength structure and the like. The generation of vortex electromagnetic waves is the basis for constructing an OAM system, and the efficient and flexible generation of multi-modal vortex electromagnetic waves is the key of the practical application of the orbital angular momentum technology.

OAM generation methods can be classified into three types according to antenna structures: helical phased structures, array antennas, super surfaces, etc. The spiral phase structure mainly comprises a spiral parabolic antenna, a spiral phase plate and the like. The spiral parabolic antenna realizes phase rotation after machining the common parabolic antenna. The spiral phase plate is a transparent plate with the thickness changing in proportion to the center, and phase rotation is achieved by controlling wave path difference of wave beams. The Array antenna is mainly a Uniform Circular antenna Array (UCA), wherein the antenna element feeding mode mainly includes two modes of phase control and time control. The super surface is an artificial periodic structure with a unit structure far smaller than the working wavelength, and a spiral phase is generated by controlling the structural form and distribution regulation of the unit structure.

By combining the existing OAM generation methods, various OAM antenna structures are found to be based on two-dimensional plane design, so that the OAM wave beam direction adjustability is weak, only a single area can be radiated, the signal coverage range is severely limited, and the practical application of the OAM technology is not facilitated.

Disclosure of Invention

The technical problem to be solved by the present invention is to provide a method for implementing a three-dimensional OAM antenna architecture for enhancing indoor signal coverage, which can implement signal coverage in multiple directions, and effectively extend the OAM signal coverage in an indoor scene.

In order to solve the above technical problem, a first aspect of the present invention discloses a method for implementing a three-dimensional OAM antenna architecture for enhancing indoor signal coverage, where the method includes: arranging the antenna array elements on the top point of the three-dimensional graph according to a preset arrangement rule to form a geometric relation between the antenna array elements; dividing the antenna array elements into a plurality of sub-arrays according to the geometric relation among the antenna array elements; and uniformly carrying out phase excitation on the antenna array elements, so that the plurality of sub-arrays respectively generate vortex electromagnetic waves with different modes to enable each sub-array to radiate in one direction.

In some embodiments, the three-dimensional figure includes a sphere, and the arranging the antenna elements on the vertices of the three-dimensional figure according to the preset arrangement rule forms the geometric relationship between the antenna elements, including: the antenna array elements are arranged to be evenly distributed on a first circumference and a second circumference which are vertical to a spherical z-axis; and forming uniformly-arranged sub-arrays according to the antenna array elements arranged on the first circumference and the second circumference.

In some embodiments, the eight sub-arrays are configured to uniformly phase excite the antenna array elements, so that the plurality of sub-arrays respectively generate vortex electromagnetic waves with different modes to enable each sub-array to radiate in one direction, including: generating thirty-two paths of shunt signals with phase excitation by an input signal through a four-power divider, a phase shifter and an eight-power divider; feeding back the thirty-two branch signals with phase excitation to eight sub-arrays, so that the eight sub-arrays generate the vortex electromagnetic wave.

In some embodiments, the three-dimensional figure includes a solid octagon, and the arranging the antenna elements on the vertex of the three-dimensional figure according to a preset arrangement rule forms a geometric relationship between the antenna elements, including: arranging antenna array elements to be distributed on a first circumference and a second circumference which are vertical to a spherical z-axis; forming uniformly distributed sub-arrays according to the antenna array elements arranged on the first circumference and the second circumference; the three-dimensional octagon comprises two regular octagons with the side lengths of the upper surface and the lower surface equal to the height of the three-dimensional octagon, the side surfaces are eight squares, and the circumscribed circles of the two regular octagons are respectively superposed with the first circumference and the second circumference.

In some embodiments, the plurality of sub-arrays generate vortex electromagnetic waves of different modes respectively so that each sub-array radiates in one direction, the antenna elements include a first number antenna element, a second number antenna element, a third number antenna element and a fourth number antenna element, and the antenna elements are uniformly phase-excited so that: dividing an input signal into four paths through a four-way power divider to generate a first signal, a second signal, a third signal and a fourth signal; the first signal is sequentially passed through a first phase shifter and a four-way power divider to generate four first branch signals with same phase excitation; feeding back the four paths of first branch signals with the same phase excitation to the antenna array element with the first number; the second signal sequentially passes through a second phase shifter and a four-way power divider to generate four paths of second shunt signals with same phase excitation; feeding back the four paths of second branch signals with the same phase excitation to the antenna array elements with the second number; the third signal sequentially passes through a third phase shifter and a four-way power divider to generate four paths of third branch signals with same phase excitation; feeding back the four third branch signals with the same phase excitation to an antenna array element with a third number; the fourth signal sequentially passes through a fourth phase shifter and a four-power divider to generate four paths of fourth branch signals with same phase excitation; feeding back the four paths of fourth branch signals with the same phase excitation to an antenna array element with a fourth number; and enabling the subarray formed by the four array elements which are arranged anticlockwise to radiate the first vortex electromagnetic wave, and enabling the subarray which is arranged clockwise to radiate the second vortex electromagnetic wave.

According to a second aspect of the present invention, there is provided a three-dimensional OAM antenna architecture system for enhancing indoor signal coverage, the system comprising: the arrangement configuration module is used for arranging the antenna array elements on the top point of the three-dimensional graph according to a preset arrangement rule to form a geometric relation among the antenna array elements; the dividing module is used for dividing the antenna array elements into a plurality of sub-arrays according to the geometric relation among the antenna array elements; and the full-coverage module is used for carrying out phase excitation on the antenna array elements uniformly, so that the plurality of sub-arrays generate vortex electromagnetic waves with different modes respectively to enable each sub-array to radiate in one direction.

In some embodiments, the three-dimensional figure comprises a sphere, and the arrangement configuration module is implemented to: the antenna array elements are arranged to be evenly distributed on a first circumference and a second circumference which are vertical to a spherical z-axis; and forming uniformly-arranged sub-arrays according to the antenna array elements arranged on the first circumference and the second circumference.

In some embodiments, the sub-arrays are eight, and the full coverage module comprises: a four-power divider, a phase shifter and an eight-power divider; the four-power divider, the phase shifter and the eight-power divider are used for generating thirty-two paths of shunt signals with phase excitation from input signals; and the feedback unit is used for feeding back the thirty-two branch signals with phase excitation to the eight subarrays so that the eight subarrays generate the vortex electromagnetic waves.

In some embodiments, the three-dimensional figure comprises a solid octagon, and the arrangement configuration module is implemented to: arranging antenna array elements to be distributed on a first circumference and a second circumference which are vertical to a spherical z-axis; forming uniformly distributed sub-arrays according to the antenna array elements arranged on the first circumference and the second circumference; the three-dimensional octagon comprises two regular octagons with the side lengths of the upper surface and the lower surface equal to the height of the three-dimensional octagon, the side surfaces are eight squares, and the circumscribed circles of the two regular octagons are respectively superposed with the first circumference and the second circumference.

In some embodiments, the sub-arrays are eight, and the full coverage module comprises: two four-power dividers, a phase shifter and an eight-power divider; the four-way power divider, the phase shifter and the eight-way power divider are used for respectively generating eight paths of branch signals with phase excitation from the first signal/the second signal/the third signal/the fourth signal; the feedback unit is used for feeding back the branch signal with the phase excitation to four sub-arrays which are arranged anticlockwise/clockwise, so that the four sub-arrays which are arranged clockwise carry the first vortex electromagnetic wave/the four sub-arrays which are arranged anticlockwise carry the second vortex electromagnetic wave signal.

Compared with the prior art, the invention has the beneficial effects that:

the invention can radiate OAM signals in all directions in space through the three-dimensional structure of the antenna array element, increases signal coverage, overcomes the defect that the traditional two-dimensional plane OAM antenna can only radiate a certain direction, and for the two-dimensional plane N-element UCA, the number of the phase shifters in the feed network is equal to the number of the array elements, if L OAM modes are generated simultaneously, the number of the phase shifters is multiplied. However, the three-dimensional spherical OAM antenna provided by the invention greatly reduces the use of phase shifters and effectively reduces the complexity of a feed network by properly adding the power divider. Furthermore, the three-dimensional octagonal OAM antenna disclosed by the invention greatly reduces the number of antenna array elements on the basis of reducing the use of phase shifters. Therefore, by two OAM antenna architecture modes of the three-dimensional spherical and expanded structure three-dimensional octagon, OAM signal coverage can be enhanced in an indoor communication scene.

Drawings

Fig. 1 is a schematic flowchart of a method for implementing a three-dimensional OAM antenna architecture for enhancing indoor signal coverage according to an embodiment of the present invention;

fig. 2 is a schematic diagram of a spherical OAM antenna architecture for enhancing indoor signal coverage according to an embodiment of the present invention;

fig. 3 is a top view of a spherical OAM antenna architecture for enhancing indoor signal coverage according to an embodiment of the present invention;

fig. 4 is a schematic diagram of a feed circuit implementation of a spherical OAM antenna architecture for enhancing indoor signal coverage according to an embodiment of the present invention;

fig. 5 is a schematic diagram of a three-dimensional octagonal OAM antenna architecture for enhancing indoor signal coverage according to an embodiment of the present invention;

fig. 6 is a top view of a three-dimensional octagonal OAM antenna architecture for enhancing indoor signal coverage according to an embodiment of the present invention;

fig. 7 is a schematic diagram of a feed circuit implementation of a three-dimensional octagonal OAM antenna architecture for enhancing indoor signal coverage according to an embodiment of the present invention;

fig. 8 is a schematic diagram of a three-dimensional OAM antenna architecture system for enhancing indoor signal coverage according to an embodiment of the present invention;

fig. 9 is a schematic structural diagram of an apparatus of a three-dimensional OAM antenna architecture for enhancing indoor signal coverage according to an embodiment of the present invention.

Detailed Description

For better understanding and implementation, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

The terms "comprises," "comprising," and any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or modules is not necessarily limited to those steps or modules explicitly listed, but may include other steps or modules not expressly listed or inherent to such process, method, article, or apparatus.

The embodiment of the invention discloses a method and a system for realizing a three-dimensional OAM antenna architecture for enhancing indoor signal coverage, which can radiate OAM signals in all directions in space through a three-dimensional architecture of an antenna array element to increase signal coverage, overcomes the defect that the traditional two-dimensional plane OAM antenna can only radiate a certain direction, and doubles the number of phase shifters if L OAM modes are generated simultaneously for a two-dimensional plane N-element UCA and the number of phase shifters in a feed network are equal to the number of array elements. However, the three-dimensional spherical OAM antenna provided by the invention greatly reduces the use of phase shifters and effectively reduces the complexity of a feed network by properly adding the power divider. Furthermore, the three-dimensional octagonal OAM antenna disclosed by the invention greatly reduces the number of antenna array elements on the basis of reducing the use of phase shifters. Therefore, by two OAM antenna architecture modes of the three-dimensional spherical and expanded structure three-dimensional octagon, OAM signal coverage can be enhanced in an indoor communication scene.

Example one

Referring to fig. 1, fig. 1 is a schematic flowchart illustrating a method for implementing a three-dimensional OAM antenna architecture for enhancing indoor signal coverage according to an embodiment of the present invention. The method for implementing the three-dimensional OAM antenna architecture for enhancing indoor signal coverage can be applied to an OAM system, and the embodiment of the invention is not limited to the applied antenna architecture system. As shown in fig. 1, the method for implementing a three-dimensional OAM antenna architecture for enhancing indoor signal coverage may include the following operations:

101. and arranging the antenna array elements on the vertex of the three-dimensional graph according to a preset arrangement rule to form a geometric relation between the antenna array elements.

The utility model provides a main design concept lies in moving the range of antenna array element to the three-dimensional space from the two-dimensional space to through arranging antenna array element on the three-dimensional figure according to certain law, divide a plurality of subarrays according to the geometric relation between the array element again, carry out the phase excitation to antenna array element in unison, each subarray just can produce respectively like this and carry the vortex electromagnetic wave of different modals, make every subarray radiate a direction, thereby realize indoor OAM signal full coverage. Specifically, the three-dimensional figure includes a spherical shape and a solid polygon, and the three-dimensional figure is not limited in the present application. Illustratively, a certain number, assumed to be N, of antenna elements are uniformly arranged at equal intervals on the circumference of a sphere with a certain radius.

102. And dividing the antenna array elements into a plurality of sub-arrays according to the geometrical relationship among the antenna array elements.

The sub-arrays are then divided according to the geometric relationship of the different antenna elements, and in the spherical geometric relationship of the present embodiment, the sub-arrays are eight by way of example.

103. The antenna array elements are uniformly subjected to phase excitation, so that a plurality of sub-arrays respectively generate vortex electromagnetic waves carrying different modes, and each sub-array radiates in one direction.

The concrete implementation is as follows: in order to realize different modes among the antenna array elements, all the antenna arrays are fed with modulation signals with the same amplitude, and a continuously-changed phase delay delta = 2 pi l/N (wherein l is a required mode value) is arranged between adjacent antenna array elements, so that after the vortex beam rotates around a transmission shaft for a circle, the phase is changed by 2 pi l, and OAM beams with different modes can be generated by changing the size of the feed phase difference among the antenna array elements.

Specifically, to explain the principle and implementation process of the embodiment in more detail, a three-dimensional figure is taken as an example for explanation, as shown in fig. 2 and fig. 3, a three-dimensional spherical OAM antenna structure and a radiation top view are shown, it can be seen that the array elements of the three-dimensional spherical OAM antenna are distributed on a first circumference Circle-1 and a second circumference Circle-2 perpendicular to a z-axis, all the antenna elements are the same, 16 antenna elements are uniformly arranged on the first circumference Circle-1, numbers #1 and #2 are sequentially assigned, 16 array elements are sequentially arranged on the second circumference Circle-2, and numbers #3 and #4 are sequentially assigned. The array elements #1, #2, #3 and #4 connected by circles form a sub-array, the sub-array elements have equal intervals and are uniformly distributed on the circumference connected by the circles to form a uniform circular antenna array. According to the OAM principle generated by the UCA communication protocol, each four-element subarray can generate vortex electromagnetic waves carrying-1, 0 and +1 modes. Then 8 groups of sub-arrays are designed for the spherical OAM antenna, and each sub-array can radiate one direction, so that indoor OAM signal full coverage is realized.

Further, the three-dimensional spherical OAM antenna element feeding flow is shown in fig. 4: for each subarray, when +1 mode vortex electromagnetic waves are radiated, phase values of four array element radiation signals of #1, #2, #3 and #4 are {0, #/2, #3 pi/2 } in sequence (the phase difference is delta = pi/2); when the mode of-1 is radiated, the phase values of the radiation signals of the four array elements are sequentially {0, -pi/2, -pi, -3 pi/2 } (the phase difference is delta = -pi/2). Taking the radiation +1 mode as an example, firstly, the vortex electromagnetic wave signal is divided into four paths by a four-way power divider, and the four paths are respectively sent to a phase shifter 1, a phase shifter 2, a phase shifter 3 and a phase shifter 4, so that the shunt signals respectively obtain phase excitation of 0, pi/2, pi and 3 pi/2, then the shunt signals are divided into 8 paths by an eight-way power divider in sequence and are sequentially fed to antenna array elements numbered as #1, #2, #3 and #4, and finally, each subarray independently generates vortex electromagnetic waves carrying the +1 mode. Therefore, OAM signal radiation can be carried out on all directions in the space through the spherical structure of the antenna array element, and signal coverage is increased.

Example two

Referring to fig. 5 and 6, fig. 5 and 6 are a perspective view of an octagonal OAM antenna structure and a radiation plan view according to an embodiment of the present invention. In order to better support the concept disclosed in the present invention, in the present embodiment, a three-dimensional figure is illustrated as a stereoscopic octagon.

As shown in fig. 5 and 6, the upper and lower surfaces of the three-dimensional octagonal OAM antenna are two regular octagons with equal size, the side surfaces are 8 squares, that is, the side lengths of the upper and lower surfaces are equal to the height of the three-dimensional structure, and the circumscribed circles of the two regular octagons are respectively overlapped with the first circumference Circle-1 and the second circumference Circle-2 (assuming that the radii of Circle-1 and Circle-2 are equal). The antenna array element with the first number, the antenna array element with the second number, the antenna array element with the third number and the antenna array element with the fourth number are included in the figure, specifically, the antenna array element with the first number #1, the antenna array element with the second number #2, the antenna array element with the third number #3 and the antenna array element with the fourth number #4 in a deeper area in the figure form a subarray, the four array elements are uniformly distributed on a first circumference and are excited by phases of {0, pi/2, pi, 3 pi/2 } (phase difference delta = pi/2) respectively to radiate vortex electromagnetic waves carrying +1 mode; and the #1, #2, #3 and #4 of the shallower region form a subarray, the four array elements are uniformly distributed on the second circumference and are respectively subjected to phase excitation of {0, pi/2, pi, 3 pi/2 } (phase difference delta = -pi/2) to radiate vortex electromagnetic waves carrying-1 mode. Because two array elements of two adjacent sub-arrays are multiplexed, compared with the three-dimensional spherical OAM antenna, when the same number of OAM modes are generated, the number of the antenna elements required by the three-dimensional octagonal OAM antenna is less and is half of that of the three-dimensional spherical OAM antenna.

Further, the three-dimensional spherical OAM antenna element feeding flow is shown in fig. 7: firstly, an input signal is divided into four paths through a four-power divider to generate a first signal, a second signal, a third signal and a fourth signal, the first signal sequentially passes through a first phase shifter and the four-power divider to generate four paths of first shunt signals with same phase excitation, the four paths of first shunt signals with the same phase excitation are fed back to an antenna array element with a first number, the second signal sequentially passes through the second phase shifter and the four-power divider to generate four paths of second shunt signals with the same phase excitation, the four paths of second shunt signals with the same phase excitation are fed back to the antenna array element with a second number, the third signal sequentially passes through a third phase shifter and the four-power divider to generate four paths of third shunt signals with the same phase excitation, the four paths of third shunt signals with the same phase excitation are fed back to the antenna array element with a third number, the fourth signal sequentially passes through the fourth phase shifter and the four-power divider to generate four paths of third shunt signals with the same phase excitation And the four paths of fourth branch signals with the same phase excitation are fed back to the antenna array element with the fourth number, so that the subarray formed by the four array elements which are arranged anticlockwise radiates the first vortex electromagnetic wave, and the subarray arranged clockwise radiates the second vortex electromagnetic wave. As a specific implementation mode, firstly, input signals are respectively sent to a phase shifter 1, a phase shifter 2, a phase shifter 3 and a phase shifter 4, so that shunt signals respectively obtain {0, pi/2, pi, 3 pi/2 } phase excitation, then the shunt signals are sequentially divided into 4 paths through a four-power divider, antenna array elements numbered as #1, #2, #3 and #4 are sequentially fed, and finally vortex electromagnetic waves carrying +1 or-1 modes are independently generated by each subarray. The subarrays arranged clockwise and counterclockwise are implemented according to the same procedure, and are not described herein again.

Furthermore, the receiving-end antenna configuration is the same as the transmitting terminal array, namely a quaternary array and a demodulation network are arranged, wherein the phase of each phase shifter in the demodulation network is set to be {0, -pi/2, -pi, -3 pi/2 } or {0, pi/2, pi, 3 pi/2 }, and the transmitting OAM signals can be demodulated according to the orthogonality among OAM modes, so that OAM communication is completed. Therefore, OAM signal radiation can be carried out on all directions in the space through the three-dimensional octagonal framework of the antenna array elements, and signal coverage is increased.

EXAMPLE III

Referring to fig. 8, fig. 8 is a schematic diagram of a three-dimensional OAM antenna architecture system for enhancing indoor signal coverage according to an embodiment of the present invention. As shown in fig. 8, the three-dimensional OAM antenna architecture system for enhancing indoor signal coverage may include:

and the arrangement configuration module 1 is used for arranging the antenna array elements on the top point of the three-dimensional graph according to a preset arrangement rule to form a geometric relationship among the antenna array elements. Illustratively, a certain number, assumed to be N, of antenna elements are uniformly arranged at equal intervals on the circumference of a sphere with a certain radius.

And the dividing module 2 is used for dividing the antenna array elements into a plurality of sub-arrays according to the geometric relationship among the antenna array elements. The sub-arrays are divided according to the geometrical relationship of different antenna elements, and exemplarily, in the spherical geometrical relationship of the present embodiment, the sub-arrays are eight.

And the full-coverage module 3 is used for carrying out phase excitation on the antenna array elements uniformly, so that the plurality of sub-arrays generate vortex electromagnetic waves carrying different modes respectively to enable each sub-array to radiate in one direction. The concrete implementation is as follows: in order to realize different modes among the antenna array elements, all the antenna arrays are fed with modulation signals with the same amplitude, and a continuously-changed phase delay delta = 2 pi l/N (wherein l is a required mode value) is arranged between adjacent antenna array elements, so that after the vortex beam rotates around a transmission shaft for a circle, the phase is changed by 2 pi l, and OAM beams with different modes can be generated by changing the size of the feed phase difference among the antenna array elements.

Specifically, the three-dimensional figure includes a sphere, and the arrangement configuration module is implemented as: the antenna elements are arranged to be evenly distributed over a first circumference and a second circumference perpendicular to the z-axis of the sphere. And forming uniformly-arranged sub-arrays according to the antenna array elements arranged on the first circumference and the second circumference. The subarrays are eight, and the full coverage module comprises: a four-power divider, a phase shifter and an eight-power divider; the four-way power divider, the phase shifter and the eight-way power divider are used for generating thirty-two paths of shunt signals with phase excitation from input signals. And the feedback unit is used for feeding back thirty-two paths of branch signals with phase excitation to the eight sub-arrays, so that the eight sub-arrays generate vortex electromagnetic waves.

Specifically, the three-dimensional figure includes a solid octagon, and the arrangement configuration module is implemented as: the antenna elements are arranged to be distributed over a first circumference and a second circumference perpendicular to the z-axis of the sphere. And forming uniformly-arranged sub-arrays according to the antenna array elements arranged on the first circumference and the second circumference. The three-dimensional octagon comprises two regular octagons, the side faces of the two regular octagons are eight squares, and the side lengths of the upper surface and the lower surface of the two regular octagons are equal to the height of the three-dimensional octagon, and the circumscribed circles of the two regular octagons are respectively superposed with the first circumference and the second circumference. The subarrays are eight, and the full coverage module comprises: two four-power dividers, a phase shifter and an eight-power divider. The four-way power divider, the phase shifter and the eight-way power divider are used for respectively generating eight paths of branch signals with phase excitation from the first signal/the second signal/the third signal/the fourth signal. The feedback unit is used for feeding back the branch signal with the phase excitation to the four sub-arrays which are arranged anticlockwise/clockwise, so that the four sub-arrays which are arranged clockwise carry the first vortex electromagnetic wave/the four sub-arrays which are arranged anticlockwise generate a second vortex electromagnetic wave signal.

Therefore, OAM signal radiation can be carried out on all directions in space through the three-dimensional framework of the antenna array elements, signal coverage is increased, the problem that a traditional two-dimensional plane OAM antenna can only radiate a certain direction is solved, the number of phase shifters in a feed network is equal to the number of array elements for a two-dimensional plane N-element UCA, and if L OAM modes are generated simultaneously, the number of the phase shifters is multiplied. However, the three-dimensional spherical OAM antenna provided by the invention greatly reduces the use of phase shifters and effectively reduces the complexity of a feed network by properly adding the power divider. Furthermore, the three-dimensional octagonal OAM antenna disclosed by the invention greatly reduces the number of antenna array elements on the basis of reducing the use of phase shifters. Therefore, by two OAM antenna architecture modes of the three-dimensional spherical and expanded structure three-dimensional octagon, OAM signal coverage can be enhanced in an indoor communication scene.

Example four

Referring to fig. 9, fig. 9 is a schematic structural diagram of a three-dimensional OAM antenna architecture apparatus for enhancing indoor signal coverage according to an embodiment of the present invention. The three-dimensional OAM antenna architecture apparatus for enhancing indoor signal coverage depicted in fig. 9 may be applied to an OAM system, and the embodiment of the present invention is not limited to the application system of the three-dimensional OAM antenna architecture for enhancing indoor signal coverage. As shown in fig. 9, the apparatus may include:

a memory 601 in which executable program code is stored;

a processor 602 coupled to a memory 601;

the processor 602 calls the executable program code stored in the memory 601 for executing the method for implementing the three-dimensional OAM antenna architecture for enhancing indoor signal coverage as described in the first embodiment or the second embodiment.

EXAMPLE five

The embodiment of the invention discloses a computer-readable storage medium, which stores a computer program for electronic data exchange, wherein the computer program enables a computer to execute the implementation method of the three-dimensional OAM antenna architecture for enhancing indoor signal coverage described in the first embodiment or the second embodiment.

EXAMPLE six

The embodiment of the invention discloses a computer program product, which comprises a non-transitory computer readable storage medium storing a computer program, and the computer program is operable to make a computer execute the method for implementing the three-dimensional OAM antenna architecture for enhancing indoor signal coverage described in the first embodiment or the second embodiment.

The above-described embodiments are only illustrative, and the modules described as separate components may or may not be physically separate, and the components displayed as modules may or may not be physical modules, may be located in one place, or may be distributed on a plurality of network modules. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution of the present embodiment. One of ordinary skill in the art can understand and implement it without inventive effort.

Through the above detailed description of the embodiments, those skilled in the art will clearly understand that the embodiments may be implemented by software plus a necessary general hardware platform, and may also be implemented by hardware. Based on such understanding, the above technical solutions may be embodied in the form of a software product, which may be stored in a computer-readable storage medium, where the storage medium includes a Read-Only Memory (ROM), a Random Access Memory (RAM), a Programmable Read-Only Memory (PROM), an Erasable Programmable Read-Only Memory (EPROM), a One-time Programmable Read-Only Memory (OTPROM), an Electrically Erasable Programmable Read-Only Memory (EEPROM), a Compact Disc-Read-Only Memory (CD-ROM), or other disk memories, CD-ROMs, or other magnetic disks, A tape memory, or any other medium readable by a computer that can be used to carry or store data.

Finally, it should be noted that: the method and apparatus for implementing a three-dimensional OAM antenna architecture for enhancing indoor signal coverage disclosed in the embodiments of the present invention are only preferred embodiments of the present invention, and are only used for illustrating the technical solutions of the present invention, not for limiting the same; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those skilled in the art; the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the spirit and scope of the technical solutions of the embodiments of the present invention.