CN115327472A

CN115327472A - Wireless orientation method based on double-magnetic dipole antenna resonant coupling

Info

Publication number: CN115327472A
Application number: CN202210900517.0A
Authority: CN
Inventors: 尤政; 赵晓光; 孙振词; 张凌云; 尤睿; 鲁文帅; 赵嘉昊; 梅子麒
Original assignee: Tsinghua University
Current assignee: Tsinghua University
Priority date: 2022-07-28
Filing date: 2022-07-28
Publication date: 2022-11-11

Abstract

The application relates to a wireless orientation method based on double-magnetic dipole antenna resonant coupling, which is applied to a magnetic dipole antenna pair, wherein the phase relation between each magnetic dipole antenna in the magnetic dipole antenna pair is configured based on a preset configuration mode, each magnetic dipole antenna generates a coupling effect under the action of incident electromagnetic waves, the direct current output voltage of each magnetic dipole antenna under the coupling effect is firstly obtained, and then the incident direction of the incident electromagnetic waves is determined according to the direct current output voltage of each magnetic dipole antenna. The method reduces the complexity of calculating the incident direction of the electromagnetic wave in the traditional technology, thereby reducing the power consumption in the radio direction finding process.

Description

Wireless orientation method based on double-magnetic dipole antenna resonance coupling

Technical Field

The application relates to the technical field of wireless direction finding, in particular to a wireless orientation method based on double-magnetic dipole antenna resonant coupling.

Background

The radio direction finding technology is a process of measuring the incoming wave direction of radio waves by using instrument equipment according to the propagation characteristics of the electromagnetic waves.

The traditional radio direction finding needs to be measured by using arrayed antennas, phase differences among the antennas are calculated through a complex signal processing circuit process, and then the incident angle of a wireless signal is calculated, so that the incident direction of an electromagnetic wave is determined.

Disclosure of Invention

In view of the above, it is desirable to provide a wireless orientation method based on resonant coupling of a dual-magnetic dipole antenna, which can reduce power consumption when calculating an incident direction of an electromagnetic wave signal.

In a first aspect, the present application provides a method for determining a signal incidence direction, which is applied to a pair of magnetic dipole antennas, wherein a phase relationship between each magnetic dipole antenna in the pair of magnetic dipole antennas is configured based on a preset configuration mode, and each magnetic dipole antenna generates a coupling effect under the action of an incident electromagnetic wave; the method comprises the following steps:

acquiring direct-current output voltage of each magnetic dipole antenna under the coupling action;

and determining the incident direction of the incident electromagnetic wave according to the direct-current output voltage of each magnetic dipole antenna.

In one embodiment, two magnetic dipole antennas in the magnetic dipole antenna pair are arranged in a back-to-back parallel mode, and the magnetic dipole antennas are spaced at a preset distance.

In one embodiment, each magnetic dipole antenna comprises a resonance unit, a coupling unit and an energy integration circuit; the resonance unit generates magnetic dipole resonance under the action of incident electromagnetic waves, and the coupling unit and the resonance unit generate coupling action to form induced alternating current;

the induced alternating current is converted into a direct current output voltage after passing through the energy integration circuit.

In one embodiment, the resonance unit, the coupling unit and the energy integration circuit are all positioned on the dielectric substrate;

the resonance unit and the coupling unit are in a coupling relation and form a double-opening resonance structure together; the coupling unit is connected with the energy integration circuit.

In one embodiment, the energy integration circuit comprises a detection circuit and a load; the first end of the detection circuit is connected with the first side of the opening end of the coupling unit, the second end of the detection circuit is connected with the first end of the load, the second end of the load is connected with the third end of the detection circuit, and the fourth end of the detection circuit is connected with the second side of the opening end of the coupling unit;

the detection circuit is used for converting the induced alternating current output by the coupling unit into a direct-current voltage signal so as to supply power to the load.

In one embodiment, determining the incident direction of the incident electromagnetic wave according to the dc output voltage of each magnetic dipole antenna comprises:

obtaining the difference value between the direct current output voltages of the magnetic dipole antennas;

and determining the incident direction of the incident electromagnetic wave according to the difference between the direct current output voltages of the magnetic dipole antennas.

In one embodiment, determining the incident direction of the incident electromagnetic wave according to the difference between the dc output voltages of the magnetic dipole antennas comprises:

determining the incident angle of the incident electromagnetic wave according to the difference between the direct-current output voltages of the magnetic dipole antennas, wherein the incident angle of the incident electromagnetic wave represents the included angle between the electromagnetic wave transmitting antenna and the magnetic dipole antenna to the central axis;

and determining the incident direction of the incident electromagnetic wave according to the incident angle of the incident electromagnetic wave.

In a second aspect, an embodiment of the present application provides a signal incidence direction device, including:

the voltage acquisition module is used for acquiring direct-current output voltage of each magnetic dipole antenna in the magnetic dipole antenna pair under the coupling action; the phase relation among all the magnetic dipole antennas is configured based on a preset configuration mode, and all the magnetic dipole antennas generate a coupling effect under the action of incident electromagnetic waves;

and the direction determining module is used for determining the incident direction of the incident electromagnetic wave according to the direct current output voltage of each magnetic dipole antenna.

In a third aspect, an embodiment of the present application provides a processing device, which includes a memory and a processor, where the memory stores a computer program, and is characterized in that the processor implements the steps of the method provided in any of the embodiments of the first aspect when executing the computer program.

In a fourth aspect, embodiments of the present application provide an electronic system comprising the processing device of the third aspect and a pair of magnetic dipole antennas; the processing device is configured to perform steps for implementing the method provided in any of the embodiments of the first aspect.

In a fifth aspect, the present application provides a computer-readable storage medium, on which a computer program is stored, where the computer program, when executed by a processor, implements the steps of the method provided in any one of the embodiments in the first aspect.

In a sixth aspect, an embodiment of the present application further provides a computer program product, which includes a computer program, and when executed by a processor, the computer program implements the steps of the method provided in any one of the embodiments of the first aspect.

The wireless orientation method based on the double-magnetic dipole antenna resonant coupling is applied to a magnetic dipole antenna pair, the phase relation between each magnetic dipole antenna in the magnetic dipole antenna pair is configured based on a preset configuration mode, each magnetic dipole antenna generates a coupling effect under the action of incident electromagnetic waves, firstly, the direct current output voltage of each magnetic dipole antenna under the coupling effect is obtained, and then, the incident direction of the incident electromagnetic waves is determined according to the direct current output voltage of each magnetic dipole antenna. According to the method, after the magnetic dipole antennas are subjected to phase configuration, only the direct current output voltage of each magnetic dipole antenna is obtained under the coupling action of incident electromagnetic waves and each magnetic dipole antenna, and then the incident direction of the incident electromagnetic waves can be directly obtained according to the direct current output voltage of each magnetic dipole antenna.

Drawings

FIG. 1 is a diagram illustrating an exemplary embodiment of a method for determining a direction of signal incidence;

FIG. 2 is a flow chart illustrating a method for determining a signal incidence direction according to an embodiment;

FIG. 3 is a schematic diagram of a method for determining a signal incidence direction according to an embodiment;

FIG. 4 is a schematic flowchart of a method for determining a signal incidence direction according to another embodiment;

FIG. 5 is a schematic diagram of a magnetic dipole antenna according to one embodiment;

FIG. 6 is a schematic diagram of a magnetic dipole antenna in another embodiment;

FIG. 7 is a schematic diagram of a magnetic dipole antenna in another embodiment;

FIG. 8 is a flowchart illustrating a method for determining a signal incidence direction according to another embodiment;

FIG. 9 is a flowchart illustrating a method for determining a signal incidence direction according to another embodiment;

FIG. 10 is a graph illustrating voltage difference as a function of angle of incidence for one embodiment;

FIG. 11 is a schematic diagram showing an application of the signal incidence direction determining method in another embodiment;

FIG. 12 is a schematic diagram of a magnetic dipole antenna in another embodiment;

FIG. 13 is a flowchart illustrating a method for determining a signal incidence direction according to another embodiment;

FIG. 14 is a diagram illustrating a simulation of a method for determining a signal incidence direction according to an embodiment;

FIG. 15 is a diagram showing a simulation of a signal incident direction determining method in another embodiment;

FIG. 16 is a diagram showing a simulation of a signal incident direction determining method in another embodiment;

FIG. 17 is a flowchart illustrating a method for determining a signal incidence direction according to another embodiment;

FIG. 18 is a block diagram showing the structure of a signal incident direction unit according to an embodiment;

FIG. 19 is a diagram showing an internal structure of a computer device according to an embodiment.

Description of reference numerals:

a WiFi transmit antenna 101; a coupling unit 103;

a resonance unit 104; a dielectric substrate 105;

a detector circuit 106; a load 107;

a ground line 108; an energy integration circuit 201;

a first magnetic dipole antenna 301; a second magnetic dipole antenna 2 302;

an electromagnetic wave 303 is incident.

Detailed Description

In order to make the objects, technical solutions and advantages of the present application more apparent, the present application is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of and not restrictive on the broad application.

The method for determining the incident direction of the signal provided by the embodiment of the application can be applied to the application environment shown in fig. 1. Wherein the pair of magnetic dipole antennas is in communication with the processing device. The magnetic dipole antenna comprises a plurality of magnetic dipole antennas, and the magnetic dipole antennas are energy collecting antennas for receiving electromagnetic wave signals.

The embodiment of the application provides a wireless orientation method based on double-magnetic dipole antenna resonant coupling, which can reduce power consumption when the incident direction of an electromagnetic wave signal is calculated.

The following detailed description will specifically explain how the technical solutions of the present application and the technical solutions of the present application solve the above technical problems by embodiments and with reference to the accompanying drawings. These several specific embodiments may be combined with each other below, and details of the same or similar concepts or processes may not be repeated in some embodiments.

In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are some embodiments of the present application, but not all embodiments.

In an embodiment, as shown in fig. 2, a method for determining a signal incidence direction is provided, where the embodiment relates to a specific process of obtaining a dc output voltage of each magnetic dipole antenna under a coupling effect, and determining an incidence direction of an incident electromagnetic wave according to the dc output voltage of each magnetic dipole antenna. This embodiment comprises the steps of:

s201, acquiring direct current output voltage of each magnetic dipole antenna under the coupling action.

The embodiment of the present application is implemented based on the pair of magnetic dipole antennas shown in fig. 1, wherein in the above fig. 1, the phase relationship between the magnetic dipole antennas in the pair of magnetic dipole antennas is configured based on a preset configuration manner, and the magnetic dipole antennas generate a coupling effect under the action of the incident electromagnetic wave. The magnetic dipole antenna is an energy collection antenna which can receive incident electromagnetic waves and generate electric energy under the action of the incident electromagnetic waves.

Therefore, when calculating the incident direction of the incident electromagnetic wave 303, first, the phase relationship between two or more magnetic dipole antennas is configured such that each magnetic dipole antenna generates a coupling effect by the incident electromagnetic wave 303, and the resonance strength of each magnetic dipole antenna is related to the incident direction of the incident electromagnetic wave 303.

Alternatively, configuring the phase relationship of the magnetic dipole antennas may be placing the magnetic dipole antennas in parallel.

After the phase relation of each magnetic dipole antenna is configured, aiming at any magnetic dipole antenna, the magnetic dipole antenna generates an electromagnetic strong coupling effect with other magnetic dipole antennas under the action of incident electromagnetic waves 303, so that the magnetic dipole antenna obtains direct-current output voltage under the coupling effect of other magnetic dipole antennas; the direct current output voltage is electric energy obtained by the magnetic dipole antenna under the coupling action of the incident electromagnetic wave 303 and other magnetic dipole antennas; by the same principle, the direct-current output voltage of each magnetic dipole antenna can be obtained.

It should be noted that each magnetic dipole antenna in the magnetic dipole antenna pair may be configured in a critical coupling state; the output voltage of each magnetic dipole antenna is more accurate when the magnetic dipole antenna pair is in a critical coupling state.

And S202, determining the incident direction of the incident electromagnetic wave according to the direct current output voltage of each magnetic dipole antenna.

Based on the obtained dc output voltage of each magnetic dipole antenna, the incident direction of the incident electromagnetic wave 303 can be obtained, optionally, the incident direction of the incident electromagnetic wave 303 can be obtained by using a preset neural network model, specifically, the dc output voltage of each magnetic dipole antenna is input into the preset neural network model, and the incident direction of the incident electromagnetic wave 303 is obtained through analysis of the neural network model; the neural network model is a pre-trained model, and the pre-trained model is arranged in the processing device and is used for determining the incident direction of the incident electromagnetic wave according to the direct-current output voltage of each magnetic dipole antenna.

The signal incidence method is applied to a magnetic dipole antenna pair, the phase relation between each magnetic dipole antenna in the magnetic dipole antenna pair is configured based on a preset configuration mode, each magnetic dipole antenna generates a coupling effect under the action of incident electromagnetic waves, firstly, direct current output voltage of each magnetic dipole antenna under the coupling effect is obtained, and then, the incidence direction of the incident electromagnetic waves is determined according to the direct current output voltage of each magnetic dipole antenna. According to the method, after the magnetic dipole antennas are subjected to phase configuration, only the direct current output voltage of each magnetic dipole antenna is required to be obtained under the coupling action of incident electromagnetic waves and each magnetic dipole antenna, and then the incident direction of the incident electromagnetic waves can be directly obtained according to the direct current output voltage of each magnetic dipole antenna.

In one embodiment, the two magnetic dipole antennas in the pair of magnetic dipole antennas are arranged in a back-to-back parallel manner, and the magnetic dipole antennas are separated by a preset distance.

As shown in fig. 3, fig. 3 is a schematic diagram of a magnetic dipole antenna pair in which two magnetic dipole antennas are placed in parallel in a back direction, where the parallel placement in the back direction indicates that the two magnetic dipole antennas are placed in parallel and rotated 180 ° with respect to each other, and optionally, the two magnetic dipole antennas are spaced 9mm apart from each other to form a coupled magnetic dipole antenna pair; where 301 and 302 represent two magnetic dipole antennas placed in parallel back to back, 301 being a first magnetic dipole antenna and 302 being a second magnetic dipole antenna. 303 is incident electromagnetic wave; it should be noted that 301 and 303 shown in fig. 3 are only for illustrating the relative positions of 301 and 302; the first and second ones of first magnetic dipole antenna 301 and second magnetic dipole antenna 302 are merely for distinguishing the two magnetic dipole antennas and are not sequentially distinguished.

It should be noted that, when the magnetic dipole antennas are separated by a preset distance, a coupling effect is generated between the magnetic dipole antennas, so that a strongly coupled magnetic dipole antenna pair can be formed, wherein the preset distance can be obtained through simulation of multiple simulation experiments.

In one embodiment, each magnetic dipole antenna includes a resonating unit, a coupling unit, and an energy integration circuit; as shown in fig. 4, this embodiment includes the steps of:

s401, the resonance unit generates magnetic dipole resonance under the action of incident electromagnetic waves, and the coupling unit and the resonance unit generate coupling action to form induced alternating current.

The incident electromagnetic wave 303 is a radio frequency signal of a certain frequency, and comes from a WiFi router, a cell phone signal base station, and the like.

Therefore, matching the resonance unit 104 with the frequency of the incident electromagnetic wave, that is, the frequency of the resonance unit 104 is the same as the frequency of the incident electromagnetic wave 303, generates magnetic dipole resonance under the action of the incident electromagnetic wave 303; since coupling section 103 can strongly couple with resonance section 104, coupling section 103 and resonance section 104 can generate a coupling action by incident electromagnetic wave 303, and an induced alternating current is obtained.

Alternatively, the resonance unit 104 may be a magnetic dipole resonance unit, and the coupling unit 103 may be a coupling coil.

S402, the induced alternating current is converted into a dc output voltage after passing through the energy integration circuit.

The energy integration circuit 201 can generate electric energy according to the induced alternating current, so that the energy integration circuit 201 is connected with the coupling unit 103, the coupling unit 103 and the resonance unit 104 generate a coupling effect, and then the induced alternating current passes through the energy integration circuit 201 to obtain a direct current output voltage.

According to the signal incidence direction determining method, the resonance unit generates magnetic dipole resonance under the action of incident electromagnetic waves, the coupling unit and the magnetic dipole resonance unit generate coupling action to form induction alternating current, and the induction alternating current is converted into direct current output voltage after passing through the energy integration circuit. In the method, direct current output voltage is obtained directly under the action of incident electromagnetic waves and under the action of the resonance unit, the coupling unit and the energy integration current, and the power consumption of the system is greatly reduced.

In one embodiment, the resonance unit, the coupling unit and the energy integration circuit are all located on the dielectric substrate; the resonance unit and the coupling unit are in a coupling relation and form a double-opening resonance structure together; the coupling unit is connected with the energy integration circuit.

When designing a magnetic dipole antenna, the magnetic dipole antenna is disposed on the dielectric substrate 105 in such a manner that the magnetic dipole antenna is processed on the dielectric substrate 105 in a printed wiring board (PCB) processing manner, and the thickness of the dielectric substrate 105 is much smaller than the wavelength.

Alternatively, the dielectric substrate 105 may be a printed circuit board, wherein a copper clad laminate (abbreviated as "foil clad laminate") is the substrate material from which the printed circuit board is fabricated, which, in addition to serving to support the various components, enables electrical connection or electrical isolation therebetween.

As shown in fig. 5, fig. 5 is a schematic diagram of a magnetic dipole antenna disposed on a dielectric substrate 105, a coupling relationship exists between a resonant unit 104 and a coupling unit 103, both of which are open-ended structures, the two open-ended structures together form a double-open-ended resonant structure, and the coupling unit 103 is connected to an energy integration circuit 201. The resonance unit 104 is configured to generate resonance under the action of the incident electromagnetic wave 303, then the resonance unit 104 and the coupling unit 103 are coupled to generate an alternating current, the energy integration circuit 201 is connected to the coupling coil 103, and the alternating current generated by the coupling unit 103 is converted into a direct current output voltage.

It should be noted that sizes, opening positions, and shapes of the structures of the resonance unit 104 and the coupling unit 103 in fig. 5 are not limited in the embodiment of the present application, and the structures of the resonance unit 104 and the coupling unit 103 in fig. 5 are rectangular half-opening structures and opening positions, which are different in size, are merely for illustration.

In fig. 5, the resonant unit 104 and the coupling unit 103 are on the same side of the dielectric substrate 105, and in practical applications, the resonant unit 104 and the coupling unit 103 may also be on different sides of the dielectric substrate 105; moreover, the energy integration circuit 201 is connected to the coupling unit 103, but the energy integration circuit 201 and the coupling unit 103 may be on the same side of the dielectric substrate 105, or may be on different sides of the dielectric substrate 105; the resonance unit 104 and the coupling unit 103 are both of an annular structure with an opening on one side, the size of the opening is not limited, and the resonance unit 104 and the coupling unit 103 can be square open rings, rectangular open rings or round open rings optionally according to practical application.

The resonance unit 104 and the coupling unit 103 are both half-open structures, and together form a double-open resonance structure, which may be a double-layer open-ended resonance ring (SRR) structure, and the SRR structure is a folding structure, and can reduce the total area occupied by the antenna under the same operating frequency condition.

It should be noted that the SRR structure, as a typical metamaterial unit base structure, has deep sub-wavelength dimensions. The SRR structure can generate loop current under the excitation of the magnetic component of incident electromagnetic wave, and can fold and coil the metal conductor in a limited space, thereby realizing the design of the electric small-sized antenna.

Optionally, for an operating frequency of 2.4GHz, the antenna size is less than or equal to 10mm × 10mm, that is, the antenna size is less than or equal to 0.08 λ, and λ is a wavelength, so that the antenna structure can meet the requirement of the microsystem and the miniaturized internet of things node for an electrically small antenna.

In one embodiment, the energy integration circuit includes a detection circuit and a load; the first end of the detection circuit is connected with the first side of the opening end of the coupling unit, the second end of the detection circuit is connected with the first end of the load, the second end of the load is connected with the third end of the detection circuit, and the fourth end of the detection circuit is connected with the second side of the opening end of the coupling unit; the detection circuit is used for converting the induced alternating current output by the coupling unit into a direct-current voltage signal so as to supply power to the load.

The magnetic dipole antennas are all provided with a detection circuit which is used for converting incident electromagnetic waves into direct current voltage signals.

As shown in fig. 6, energy integration circuit 201 includes detector circuit 106 and load 107, a first end of detector circuit 106 is connected to a first side of the open end of coupling section 103, a second end of detector circuit 106 is connected to a first end of load 107, a second end of load 107 is connected to a third end of detector circuit 106, and a fourth end of detector circuit 106 is connected to a second side of the open end of coupling section 103.

Furthermore, as shown in fig. 7, the resonant circuit 106 in fig. 7 includes a first capacitor, a second capacitor, a first diode, and a second diode, where a is the first capacitor, b is the first diode, c is the second capacitor, and d is the second diode, where the first capacitor a is connected in series with the first diode b, the first capacitor a is connected in series with the second diode d, the second diode d is connected in parallel with the second capacitor c, and the second capacitor c is connected in series with the first diode b, and the first capacitor a is connected with the second capacitor c through the first diode b, that is, the first diode b is disposed between the first capacitor a and the second capacitor c. The load 107 is connected in series with the first capacitor a and the first diode b, and is connected in parallel with the second capacitor c.

Specifically, a first end of a first capacitor a is connected to a first side of an open end of the coupling unit 103, a second end of the first capacitor a is connected to a positive electrode of a first diode b, a second end of the first capacitor a is connected to a negative electrode of a second diode d, a negative electrode of the first diode b is connected to a first end of a second capacitor c, the second diode d is connected to the second capacitor c in parallel, a second end of the second capacitor c is connected to a second side of the open end of the coupling unit 103, the second capacitor c is connected to the load 107 in parallel, a first end of the load 107 is connected to a negative electrode of the first diode b, and a second end of the load 107 is connected to a second end of the second capacitor c.

The detection circuit 106 is further connected to a system ground 108, and specifically, the second end of the second capacitor c and the anode of the second diode d are both connected to the system ground 108; a system ground 108 and a load 107 are also provided on the dielectric substrate 105.

With continued reference to fig. 7, the detector circuit 106 is connected to the coupling coil 103, and the incident electromagnetic wave 303 causes resonance in the resonance unit 104, thereby causing an induced alternating current in the coupling coil 103, generating an alternating voltage across the coupling coil 103, and generating a dc output voltage through the detector circuit 106 consisting of the first capacitor a, the second capacitor c, the first diode b, and the second diode d.

Also included in fig. 7 is WiFi transmit antenna 101, where WiFi transmit antenna 101 is capable of emitting an incident electromagnetic wave 303.

In one embodiment, as shown in fig. 8, determining the incident direction of the incident electromagnetic wave 303 according to the dc output voltage of each magnetic dipole antenna includes the following steps:

and S801, acquiring the difference between the direct current output voltages of the magnetic dipole antennas.

The difference between the dc output voltages of the magnetic dipole antennas is determined based on the dc output voltages of the detector circuits 106 of the magnetic dipole antennas. Optionally, a difference between the dc output voltages of the magnetic dipole antennas is determined, and the obtained voltage difference may be a voltage difference between each two magnetic dipole antennas. For example, if there are two magnetic dipole antennas, that is, the magnetic dipole antenna 1 and the magnetic dipole antenna 2, the voltage difference between the magnetic dipole antenna 1 and the magnetic dipole antenna 2 is calculated; if the number of the magnetic dipole antennas is three, namely the magnetic dipole antenna 1, the magnetic dipole antenna 2 and the magnetic dipole antenna 3, the voltage difference value of the magnetic dipole antenna 1 and the magnetic dipole antenna 2 is calculated, the voltage difference value of the magnetic dipole antenna 1 and the magnetic dipole antenna 3 is calculated, and the voltage difference value of the magnetic dipole antenna 2 and the magnetic dipole antenna 3 is calculated.

S802, determining the incident direction of the incident electromagnetic wave according to the difference value between the direct current output voltages of the magnetic dipole antennas.

The incident direction of the incident electromagnetic wave 303 is determined based on the obtained difference between the dc output voltages of the magnetic dipole antennas, that is, the incident direction of the incident electromagnetic wave 303 can be determined according to a preset direction determination model, specifically, the incident direction of the incident electromagnetic wave 303 is obtained by analyzing the direction determination model by using the difference between the dc output voltages of the magnetic dipole antennas as an input of the direction determination model.

And the signal incidence direction obtains the difference value between the direct current output voltages of the magnetic dipole antennas, and the incidence direction of the incident electromagnetic wave is determined according to the difference value between the direct current output voltages of the magnetic dipole antennas. In the method. In the method, the incident direction of the incident electromagnetic wave can be determined through the difference value between the direct current output voltages of the magnetic dipole antennas, so that the calculation complexity is reduced, and the power consumption of the system is reduced.

In one embodiment, as shown in fig. 9, determining the incident direction of the incident electromagnetic wave according to the difference between the dc output voltages of the magnetic dipole antennas includes the following steps:

s901, determining the incident angle of the incident electromagnetic wave according to the difference value between the direct current output voltages of the magnetic dipole antennas, wherein the incident angle of the incident electromagnetic wave represents the included angle between the electromagnetic wave transmitting antenna and the magnetic dipole antenna to the central axis.

As shown in fig. 10, determining an incident angle corresponding to a difference between dc output voltages of the magnetic dipole antenna according to a linear relationship between a preset incident angle and a voltage difference; fig. 10 may first determine a relationship between an incident angle and a voltage difference according to a simulation test, specifically, first fix a distance between the WiFi transmitting antenna 101 and the pair of magnetic dipole antennas, obtain voltage differences at different incident angles through simulation and experiments by changing an incident angle of the incident electromagnetic wave 303 of the WiFi transmitting antenna 101, and then fit the voltage differences at different incident angles to obtain a fitting curve, that is, a variation relationship between the incident angle and the voltage difference.

First, an average difference value is calculated from the difference value between the dc output voltages of the magnetic dipole antennas, and then the incident angle of the incident electromagnetic wave 303 is determined in the linear relationship between the voltage difference value and the incident angle in fig. 10, for example, if the average difference value is 20, the incident angle of the incident electromagnetic wave is 46 °. And the incident angle is the included angle between the electromagnetic wave transmitting antenna and the magnetic dipole antenna to the central axis.

As shown in fig. 11, 303 in fig. 11 represents an incident electromagnetic wave, and 301 and 302 represent two magnetic dipole antennas, where θ is the incident angle of the incident electromagnetic wave.

And S902, determining the incident direction of the incident electromagnetic wave according to the incident angle of the incident electromagnetic wave.

The incident direction of the incident electromagnetic wave 303 can be determined according to the incident angle of the incident electromagnetic wave 303 and the position of each magnetic dipole antenna.

The signal incidence direction determining method determines the incidence angle of the incident electromagnetic wave according to the difference value between the direct current output voltages of the magnetic dipole antennas, wherein the incidence angle of the incident electromagnetic wave represents the included angle between the electromagnetic wave transmitting antenna and the magnetic dipole antenna to the central axis; and determining the incident direction of the incident electromagnetic wave according to the incident angle of the incident electromagnetic wave. According to the method, the incident direction of the incident electromagnetic wave can be determined according to the difference value between the direct current output voltages of the magnetic dipole antennas, the complexity of calculating the wireless direction finding is reduced, and the power consumption of the system is reduced.

In one embodiment, as shown in fig. 12, fig. 12 is a schematic diagram of a single miniaturized magnetic dipole antenna, where 303 is an incident electromagnetic wave, the resonant unit 104 and the coupling unit 103 are on the same side of the

dielectric substrate

105, 107 is a circuit load, 108 is a ground of the system, and the resonant unit 104, the coupling unit 103, the detection circuit 106, the load 107 and the ground 108 are all disposed on the dielectric substrate 105; d is the side length of the coupling unit 103 ₂ Side length of the resonant unit 104, w width of the coupling unit 103, w ₂ The width of the resonant cell 103.

In one embodiment, as shown in fig. 13, fig. 13 is a schematic flow chart of obtaining an incident direction according to two magnetic dipole antennas, and this embodiment is used for a coupled dual magnetic dipole antenna for two-dimensional in-plane radio angle measurement. Where 303 is an incident electromagnetic wave, and the magnetic dipole antenna 1 and the magnetic dipole antenna 2 are two identical magnetic dipole antennas. The magnetic dipole resonance antenna 1 comprises a resonance unit 1 and a coupling unit 1, and the magnetic dipole resonance antenna 2 comprises a resonance unit 2 and a coupling unit 2; firstly, under the action of incident electromagnetic waves 303, a magnetic dipole resonance antenna 1 and a magnetic dipole resonance antenna 2 are mutually coupled to obtain a first alternating current and a second alternating current, the first alternating current corresponds to the magnetic dipole antenna 1, the second alternating current corresponds to the magnetic dipole antenna 2, the first alternating current and the second alternating current respectively pass through a corresponding detection circuit 106, the detection circuit 106 carries out signal processing to obtain direct current output voltage, the difference value of the direct current output voltage and the direct current output voltage is calculated, and an incident angle, namely an incident direction, is obtained according to the difference value of the direct current output voltage; the incident angle and the difference value of two direct current output voltages of the two magnetic dipole antennas are basically in a linear relation. And thus can be used to calculate the incident angle of the incident electromagnetic wave.

When the incident direction of the incident electromagnetic wave 303 and the magnetic dipole antenna have a certain included angle with respect to the central axis, the two magnetic dipole antennas form different voltage outputs, and the included angle between the incident electromagnetic wave 303 and the central axis of the two antennas can be obtained by calculating the direct-current voltage difference between the two magnetic dipole antennas through the outputs. The accurate determination of the incident direction of the incident electromagnetic wave 303 can be achieved by using a small-sized, deep subwavelength antenna structure and a simple circuit structure. Therefore, the incident angle can be determined by only measuring the direct current output voltages of the two antenna detection circuits, and the miniaturized and integrated radio direction finding module, the support micro-system and the miniaturized internet of things node are realized.

Alternatively, two magnetic dipole antennas are used to form a cubic structure with a volume of about 1cm x 1cm, without the need for complex phase measurement circuitry. The incident angle can be measured by utilizing the difference value of the direct current detection signal, and the dual energy supply of wireless energy collection and wireless direction finding can be realized, so that a multifunctional micro system and a miniature internet of things node are supported.

Taking two magnetic dipole antennas as an example, the included angle between the signal transmission direction of the incident electromagnetic wave 303 and the central axis of the magnetic dipole antenna is θ, and when θ changes from 0 ° to 180 °, the outputs of the two magnetic dipole antennas change.

In one embodiment, simulation is performed by using commercial simulation software CST2020, the transmission coefficients S21 of the two magnetic dipole antennas are subjected to simulation calculation according to the signal incidence angle theta of the incident electromagnetic wave, and the frequency of the incident electromagnetic wave emitted by the WiFi antenna 401 is 2.4GHz. As shown in fig. 14, when θ is 0 °, the output of magnetic dipole antenna 301 is strong, and the output of magnetic dipole antenna 302 is almost 0; as shown in fig. 15, when θ is 90 °, the outputs of the magnetic dipole antenna 301 and the magnetic dipole antenna 302 are almost equal; as shown in fig. 16, when θ is 180 °, the output of the magnetic dipole antenna 302 is strong, the output of the magnetic dipole antenna 301 is almost 0, and therefore the output intensities of the two magnetic dipole antennas are related to the incident angle of the incident electromagnetic wave 303.

It should be noted that the application scenarios in the embodiments of the present application are only examples, and do not limit the correspondence between the method and the application, nor exclude other specific methods and application scenarios.

In one embodiment, as shown in fig. 17, taking as an example that the pair of magnetic dipole antennas includes a first magnetic dipole antenna and a second magnetic dipole antenna, the first magnetic dipole antenna includes a first magnetic dipole resonance unit, a first coupling coil, and a first detector circuit, and the second magnetic dipole antenna includes a second magnetic dipole resonance unit, a second coupling coil, and a second detector circuit, the embodiment includes:

s1701, a first magnetic dipole resonance unit in the first magnetic dipole antenna generates a first magnetic dipole resonance under the action of an incident electromagnetic wave.

And S1702, coupling the first coupling coil and the first magnetic dipole resonance of the first magnetic dipole resonance unit to generate a first alternating current.

And S1703, converting the first alternating current by a first detection circuit to obtain a first direct current output voltage.

And S1704, generating second magnetic dipole resonance by a second magnetic dipole resonance unit in the second magnetic dipole antenna under the action of the incident electromagnetic wave.

And S1705, the second coupling coil and the second magnetic dipole of the second magnetic dipole resonance unit perform a coupling action to generate a second alternating current.

And S1706, the second alternating current is converted by the second detection circuit to obtain a second direct current output voltage.

S1707, calculating a difference between the first dc output voltage and the second dc output voltage to obtain a voltage difference.

And S1708, obtaining an incident angle corresponding to the voltage difference value, namely the incident direction of the incident electromagnetic wave according to the linear relation between the voltage difference value and the incident angle.

The implementation principle and technical effect of each step in the method for determining the signal incidence direction provided in this embodiment are similar to those in the foregoing embodiments of the method for determining the signal incidence direction, and are not described herein again.

It should be understood that, although the steps in the flowcharts related to the embodiments as described above are sequentially displayed as indicated by arrows, the steps are not necessarily performed sequentially as indicated by the arrows. The steps are not performed in the exact order shown and described, and may be performed in other orders, unless explicitly stated otherwise. Moreover, at least a part of the steps in the flowcharts related to the embodiments described above may include multiple steps or multiple stages, which are not necessarily performed at the same time, but may be performed at different times, and the execution order of the steps or stages is not necessarily sequential, but may be performed alternately or alternately with other steps or at least a part of the steps or stages in other steps.

Based on the same inventive concept, the embodiment of the present application further provides a signal incidence direction device for implementing the signal incidence direction determination method. The implementation scheme for solving the problem provided by the apparatus is similar to the implementation scheme described in the above method, so that specific limitations in one or more embodiments of the signal incidence direction apparatus provided below can be referred to the limitations of the signal incidence direction determination method in the foregoing, and details are not described herein again.

In one embodiment, as shown in fig. 18, there is provided a signal incidence direction apparatus 1800 comprising: a voltage acquisition module 1801 and a direction determination module 1802, wherein:

a voltage obtaining module 1801, configured to obtain a dc output voltage of each magnetic dipole antenna in the magnetic dipole antenna pair under a coupling effect; the phase relation among all the magnetic dipole antennas is configured based on a preset configuration mode, and all the magnetic dipole antennas generate a coupling effect under the action of incident electromagnetic waves;

and a direction determining module 1802, configured to determine an incident direction of the incident electromagnetic wave according to the dc output voltage of each magnetic dipole antenna.

In one embodiment, each magnetic dipole antenna comprises a resonating element, a coupling element, and an energy integration circuit; the resonance unit generates magnetic dipole resonance under the action of incident electromagnetic waves, and the coupling unit and the resonance unit generate coupling action to form induced alternating current; the induced alternating current is converted into a direct current output voltage after passing through the energy integration circuit.

In one embodiment, the resonance unit, the coupling unit and the energy integration circuit are all located on the dielectric substrate; the resonance unit and the coupling unit are in a coupling relationship, and the resonance unit and the coupling unit jointly form a double-opening resonance structure; the coupling unit is connected with the energy integration circuit.

In one embodiment, the direction determination module 1802 includes:

the difference value acquisition unit is used for acquiring the difference value between the direct current output voltages of the magnetic dipole antennas;

and the direction determining unit is used for determining the incident direction of the incident electromagnetic wave according to the difference value between the direct current output voltages of the magnetic dipole antennas.

In one embodiment, the direction determining unit includes:

the angle determining subunit is used for determining the incident angle of the incident electromagnetic wave according to the difference value between the direct-current output voltages of the magnetic dipole antennas, wherein the incident angle of the incident electromagnetic wave represents the included angle between the electromagnetic wave transmitting antenna and the magnetic dipole antenna to the central axis;

and the direction determining subunit is used for determining the incident direction of the incident electromagnetic wave according to the incident angle of the incident electromagnetic wave.

The modules in the signal incidence direction device can be wholly or partially realized by software, hardware and a combination thereof. The modules can be embedded in a hardware form or independent from a processor in the computer device, and can also be stored in a memory in the computer device in a software form, so that the processor can call and execute operations corresponding to the modules.

In one embodiment, a computer device is provided, which may be a terminal, and its internal structure diagram may be as shown in fig. 19. The computer device comprises a processor, a memory, a communication interface, a display screen and an input device which are connected through a system bus. Wherein the processor of the computer device is configured to provide computing and control capabilities. The memory of the computer device comprises a nonvolatile storage medium and an internal memory. The non-volatile storage medium stores an operating system and a computer program. The internal memory provides an environment for the operation of an operating system and computer programs in the non-volatile storage medium. The communication interface of the computer device is used for carrying out wired or wireless communication with an external terminal, and the wireless communication can be realized through WIFI, a mobile cellular network, NFC (near field communication) or other technologies. The computer program is executed by a processor to implement a signal incidence direction determination method. The display screen of the computer equipment can be a liquid crystal display screen or an electronic ink display screen, and the input device of the computer equipment can be a touch layer covered on the display screen, a key, a track ball or a touch pad arranged on the shell of the computer equipment, an external keyboard, a touch pad or a mouse and the like.

It will be appreciated by those skilled in the art that the configuration shown in fig. 19 is a block diagram of only a portion of the configuration associated with the present application, and is not intended to limit the computing device to which the present application may be applied, and that a particular computing device may include more or less components than those shown, or may combine certain components, or have a different arrangement of components.

In one embodiment, there is provided a processing device comprising a memory having a computer program stored therein and a processor that when executing the computer program performs the steps of:

acquiring direct current output voltage of each magnetic dipole antenna under the coupling action;

In one embodiment, each magnetic dipole antenna comprises a resonating element, a coupling element, and an energy integration circuit; the processor, when executing the computer program, implements the steps of:

the resonance unit generates magnetic dipole resonance under the action of incident electromagnetic waves, and the coupling unit and the resonance unit generate coupling action to form induced alternating current;

In one embodiment, the energy integration circuit comprises a detection circuit and a load; the first end of the detection circuit is connected with the first side of the opening end of the coupling unit, the second end of the detection circuit is connected with the first end of the load, the second end of the load is connected with the third end of the detection circuit, and the fourth end of the detection circuit is connected with the second side of the opening end of the coupling unit; the detection circuit is used for converting the induced alternating current output by the coupling unit into a direct-current voltage signal so as to supply power to the load.

In one embodiment, the processor, when executing the computer program, further performs the steps of:

In one embodiment, the processor when executing the computer program further performs the steps of:

The implementation principle and technical effect of the processing device provided by the above embodiment are similar to those of the above method embodiment, and are not described herein again.

In one embodiment, a computer-readable storage medium is provided, having a computer program stored thereon, which when executed by a processor, performs the steps of:

In one embodiment, each magnetic dipole antenna comprises a resonating element, a coupling element, and an energy integration circuit; the computer program when executed by a processor implements the steps of:

In one embodiment, the computer program when executed by the processor further performs the steps of:

determining the incident angle of the incident electromagnetic wave according to the difference between the direct current output voltages of the magnetic dipole antennas, wherein the incident angle of the incident electromagnetic wave represents the included angle between the electromagnetic wave transmitting antenna and the magnetic dipole antenna to the central axis;

The implementation principle and technical effect of the computer-readable storage medium provided by the above embodiments are similar to those of the above method embodiments, and are not described herein again.

In one embodiment, a computer program product is provided, comprising a computer program which, when executed by a processor, performs the steps of:

In one embodiment, each magnetic dipole antenna includes a resonating unit, a coupling unit, and an energy integration circuit; the computer program when executed by a processor implements the steps of:

acquiring a difference value between direct current output voltages of the magnetic dipole antennas;

The implementation principle and technical effect of the computer program product provided by the above embodiments are similar to those of the above method embodiments, and are not described herein again.

It should be noted that, the user information (including but not limited to user device information, user personal information, etc.) and data (including but not limited to data for analysis, stored data, presented data, etc.) referred to in the present application are information and data authorized by the user or sufficiently authorized by each party.

It will be understood by those skilled in the art that all or part of the processes of the methods of the embodiments described above can be implemented by hardware instructions of a computer program, which can be stored in a non-volatile computer-readable storage medium, and when executed, can include the processes of the embodiments of the methods described above. Any reference to memory, database, or other medium used in the embodiments provided herein may include at least one of non-volatile and volatile memory. The nonvolatile Memory may include Read-Only Memory (ROM), magnetic tape, floppy disk, flash Memory, optical Memory, high-density embedded nonvolatile Memory, resistive Random Access Memory (ReRAM), magnetic Random Access Memory (MRAM), ferroelectric Random Access Memory (FRAM), phase Change Memory (PCM), graphene Memory, and the like. Volatile Memory can include Random Access Memory (RAM), external cache Memory, and the like. By way of illustration and not limitation, RAM can take many forms, such as Static Random Access Memory (SRAM) or Dynamic Random Access Memory (DRAM), for example. The databases involved in the embodiments provided herein may include at least one of relational and non-relational databases. The non-relational database may include, but is not limited to, a block chain based distributed database, and the like. The processors referred to in the embodiments provided herein may be general purpose processors, central processing units, graphics processors, digital signal processors, programmable logic devices, quantum computing based data processing logic devices, etc., without limitation.

The technical features of the above embodiments can be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the above embodiments are not described, but should be considered as the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

The above-mentioned embodiments only express several embodiments of the present application, and the description thereof is specific and detailed, but not construed as limiting the scope of the present application. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the concept of the present application, which falls within the scope of protection of the present application. Therefore, the protection scope of the present application shall be subject to the appended claims.

Claims

1. A signal incidence direction determining method is characterized in that the method is applied to a magnetic dipole antenna pair, the phase relation between magnetic dipole antennas in the magnetic dipole antenna pair is configured based on a preset configuration mode, and each magnetic dipole antenna generates a coupling effect under the action of incident electromagnetic waves;

the method comprises the following steps:

2. The method of claim 1, wherein the two magnetic dipole antennas of the pair of magnetic dipole antennas are disposed in a back-to-back parallel relationship and the magnetic dipole antennas are spaced apart by a predetermined distance.

3. The method of claim 1 or 2, wherein each magnetic dipole antenna comprises a resonating element, a coupling element, and an energy-integrating circuit; the resonance unit generates magnetic dipole resonance under the action of the incident electromagnetic wave, and the coupling unit and the resonance unit generate coupling action to form induction alternating current;

the induced alternating current is converted into the direct current output voltage after passing through the energy integration circuit.

4. The method of claim 3, wherein the resonance unit, the coupling unit and the energy integration circuit are all located on the dielectric substrate;

the resonance unit and the coupling unit are in a coupling relation, and the resonance unit and the coupling unit jointly form a double-opening resonance structure; the coupling unit is connected with the energy integration circuit.

5. The method of claim 3, wherein the energy integration circuit comprises a detector circuit and a load; the first end of the detector circuit is connected with the first side of the opening end of the coupling unit, the second end of the detector circuit is connected with the first end of the load, the second end of the load is connected with the third end of the detector circuit, and the fourth end of the detector circuit is connected with the second side of the opening end of the coupling unit;

6. The method according to claim 1 or 2, wherein the determining the incident direction of the incident electromagnetic wave according to the dc output voltage of each magnetic dipole antenna comprises:

and determining the incident direction of the incident electromagnetic wave according to the difference value between the direct current output voltages of the magnetic dipole antennas.

7. The method of claim 6, wherein determining the incident direction of the incident electromagnetic wave according to the difference between the DC output voltages of the magnetic dipole antennas comprises:

determining the incident angle of the incident electromagnetic wave according to the difference value between the direct-current output voltages of the magnetic dipole antennas, wherein the incident angle of the incident electromagnetic wave represents the included angle between the electromagnetic wave transmitting antenna and the magnetic dipole antennas to the central axis;

8. A signal incidence direction determining apparatus, characterized in that the apparatus comprises:

the voltage acquisition module is used for acquiring direct current output voltage of each magnetic dipole antenna in the magnetic dipole antenna pair under the coupling action; the phase relation among all the magnetic dipole antennas is configured based on a preset configuration mode, and all the magnetic dipole antennas generate a coupling effect under the action of incident electromagnetic waves;

and the direction determining module is used for determining the incident direction of the incident electromagnetic wave according to the direct-current output voltage of each magnetic dipole antenna.

9. A processing device comprising a memory and a processor, the memory storing a computer program, wherein the processor when executing the computer program implements the steps of the method of any of claims 1 to 7.

10. An electronic system comprising the processing device of claim 9 and a pair of magnetic dipole antennas; the processing device is configured to perform the steps of implementing the method of any one of claims 1 to 7.