CN117712670A - Series-parallel stacked array of magnetoelectric antennas and method for establishing equivalent circuit model of series-parallel stacked array - Google Patents
Series-parallel stacked array of magnetoelectric antennas and method for establishing equivalent circuit model of series-parallel stacked array Download PDFInfo
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Abstract
The application discloses a series-parallel stacked array of magneto-electric antennas and an equivalent circuit model building method thereof. The series-parallel stacked array of the magnetoelectric antennas comprises a first magnetoelectric antenna, a second magnetoelectric antenna, a third magnetoelectric antenna, a fourth magnetoelectric antenna, a first fixed constraint device, a second fixed constraint device and a third fixed constraint device; the first fixed constraint device is arranged between the first magnetoelectric antenna and the second magnetoelectric antenna and is used for fixedly connecting the second magnetoelectric antenna to the first magnetoelectric antenna so that the vibration direction of the second magnetoelectric antenna is on an extension line of the vibration direction of the first magnetoelectric antenna to form a binary serial array of the magnetoelectric antennas; the second fixed constraint device is arranged between the third magnetoelectric antenna and the binary serial array of magnetoelectric antennas. The series-parallel stacked array of the magnetoelectric antennas can quantitatively analyze the frequency response of the series-parallel stacked array of the magnetoelectric antennas, and the radiation intensity of the magnetoelectric antennas is improved.
Description
Technical Field
The application relates to the technical field of magnetoelectric antennas, in particular to a series-parallel stacked array of magnetoelectric antennas and an equivalent circuit model building method thereof.
Background
The magneto-electric antenna is a miniaturized low-frequency mechanical antenna capable of directly generating electromagnetic radiation based on a vibrating magnetic dipole. The current research on the magnetoelectric antenna mainly aims at improving the radiation intensity, the communication distance and the like of the magnetoelectric antenna. For how to improve the radiation intensity of the magnetoelectric antenna, in the field of materialology, the novel material with larger equivalent magnetic charge is relied on; in the field of structural mechanics, research focuses on designing a magneto-electric antenna structure with larger amplitude; in the field of antenna design, the overall radiation intensity is mainly improved by designing an antenna array.
Currently, in the design of a magnetoelectric antenna array, a serious problem is faced, namely, the magnetoelectric antenna array lacks effective theoretical guidance and can only be directly tested, so that closed loop research cannot be formed.
Disclosure of Invention
Aiming at least one defect or improvement requirement of the prior art, the invention provides a series-parallel stacked array of a magneto-electric antenna and an equivalent circuit model building method thereof, which can quantitatively analyze the frequency response of the series-parallel stacked array of the magneto-electric antenna and improve the radiation intensity of the magneto-electric antenna.
In order to achieve the above object, according to a first aspect of the present invention, there is provided a serial-parallel stacked array of magnetoelectric antennas, including a first magnetoelectric antenna, a second magnetoelectric antenna, a third magnetoelectric antenna, a fourth magnetoelectric antenna, a first fixed constraint device, a second fixed constraint device, and a third fixed constraint device; the first fixed constraint device is arranged between the first magnetoelectric antenna and the second magnetoelectric antenna and is used for fixedly connecting the second magnetoelectric antenna to the first magnetoelectric antenna so that the vibration direction of the second magnetoelectric antenna is on an extension line of the vibration direction of the first magnetoelectric antenna to form a binary serial array of the magnetoelectric antennas; the second fixed constraint device is arranged between the third magnetoelectric antenna and the binary serial array of the magnetoelectric antenna and is used for fixedly connecting the third magnetoelectric antenna to the binary serial array of the magnetoelectric antenna so that the vibration direction of the third magnetoelectric antenna is parallel to the vibration direction of the binary serial array of the magnetoelectric antenna; the third fixed restraining device is arranged between the fourth magnetoelectric antenna and the binary serial array of the magnetoelectric antenna and is used for fixedly connecting the fourth magnetoelectric antenna to the binary serial array of the magnetoelectric antenna so that the vibration direction of the fourth magnetoelectric antenna is parallel to the vibration direction of the binary serial array of the magnetoelectric antenna.
Further, the first magnetoelectric antenna, the second magnetoelectric antenna, the third magnetoelectric antenna and the fourth magnetoelectric antenna are all the same in structure, and the structure comprises an interdigital electrode film, a ferroelectric phase film and a ferromagnetic phase film which are arranged from inside to outside, the first fixed restraining device is arranged between the ferromagnetic phase film of the first magnetoelectric antenna and the ferromagnetic phase film of the second magnetoelectric antenna, the second fixed restraining device is arranged between the ferromagnetic phase film of the third magnetoelectric antenna and the ferromagnetic phase film of the binary serial array of the magnetoelectric antenna, and the third fixed restraining device is arranged between the ferromagnetic phase film of the fourth magnetoelectric antenna and the ferromagnetic phase film of the binary serial array of the magnetoelectric antenna.
Further, the first fixed restraining device, the second fixed restraining device and the third fixed restraining device are all made of nonmagnetic materials.
Further, the nonmagnetic material includes acryl or rubber.
Further, the physical quantities of the first magnetoelectric antenna, the second magnetoelectric antenna, the third magnetoelectric antenna and the fourth magnetoelectric antenna are the same, the physical quantities comprise the elasticity coefficient and the load mass of a spring, and the relationship between the resonant frequency of the first magnetoelectric antenna, the second magnetoelectric antenna, the third magnetoelectric antenna or the fourth magnetoelectric antenna and the physical quantities is as follows:
Wherein m is the load mass, k is the elastic coefficient of the spring, and f is the resonant frequency of the magnetoelectric antenna.
Further, the physical quantity further includes magneto-electric antenna damping, and the relation between the bandwidths of the first magneto-electric antenna, the second magneto-electric antenna, the third magneto-electric antenna or the fourth magneto-electric antenna and the physical quantity is:
wherein r is magneto-electric antenna damping, and B is magneto-electric antenna bandwidth.
According to a second aspect of the present invention, there is provided an equivalent circuit model building method applied to a series-parallel stacked array of any one of the above magneto-electric antennas, the method comprising:
respectively acquiring physical quantities of the first magnetoelectric antenna, the second magnetoelectric antenna, the third magnetoelectric antenna and the fourth magnetoelectric antenna, wherein the physical quantities comprise an elastic coefficient of a spring, load quality and magnetoelectric antenna damping;
according to the elastic coefficient of a spring, the load mass and the damping of the magnetoelectric antenna, an equivalent circuit model of a series-parallel stacked array of the magnetoelectric antenna is established, wherein the equivalent circuit model comprises a first capacitor, a second capacitor, a third capacitor, a fourth capacitor, a first inductor, a second inductor, a third inductor, a fourth inductor, a first resistor, a second resistor, a third resistor and a fourth resistor, the first capacitor and the second capacitor are connected in series, the first capacitor is respectively connected in parallel with the third capacitor and the fourth capacitor, and the first capacitor, the first resistor, the second resistor, the third resistor, the fourth inductor, the third inductor, the second inductor and the first inductor are connected in series; the value of the first capacitor is the inverse of the spring coefficient of the spring of the first magnetoelectric antenna, the value of the second capacitor is the inverse of the spring coefficient of the spring of the second magnetoelectric antenna, the value of the third capacitor is the inverse of the spring coefficient of the spring of the third magnetoelectric antenna, and the value of the fourth capacitor is the inverse of the spring coefficient of the spring of the fourth magnetoelectric antenna; the value of the first inductor is the load mass of the first magnetoelectric antenna, the value of the second inductor is the load mass of the second magnetoelectric antenna, the value of the third inductor is the load mass of the third magnetoelectric antenna, and the value of the fourth inductor is the load mass of the fourth magnetoelectric antenna; the value of the first resistor is the magneto-electric antenna damping of the first magneto-electric antenna, the value of the second resistor is the magneto-electric antenna damping of the second magneto-electric antenna, the value of the third resistor is the magneto-electric antenna damping of the third magneto-electric antenna, and the value of the fourth resistor is the magneto-electric antenna damping of the fourth magneto-electric antenna.
According to a third aspect of the present invention, there is also provided an equivalent circuit model building apparatus applied to the series-parallel stacked array of any one of the magneto-electric antennas described above, the apparatus comprising:
an acquisition module configured to acquire physical quantities of the first magnetoelectric antenna, the second magnetoelectric antenna, the third magnetoelectric antenna, and the fourth magnetoelectric antenna, respectively, the physical quantities including an elastic coefficient of a spring, a load mass, and a magnetoelectric antenna damping;
the building module is configured to build an equivalent circuit model of the series-parallel stacked array of the magnetoelectric antenna according to the elastic coefficient of the spring, the load quality and the magnetoelectric antenna damping, wherein the equivalent circuit model comprises a first capacitor, a second capacitor, a third capacitor, a fourth capacitor, a first inductor, a second inductor, a third inductor, a fourth inductor, a first resistor, a second resistor, a third resistor and a fourth resistor, the first capacitor and the second capacitor are connected in series, the first capacitor is respectively connected in parallel with the third capacitor and the fourth capacitor, and the first capacitor, the first resistor, the second resistor, the third resistor, the fourth inductor, the third inductor, the second inductor and the first inductor are connected in series; the value of the first capacitor is the inverse of the spring coefficient of the spring of the first magnetoelectric antenna, the value of the second capacitor is the inverse of the spring coefficient of the spring of the second magnetoelectric antenna, the value of the third capacitor is the inverse of the spring coefficient of the spring of the third magnetoelectric antenna, and the value of the fourth capacitor is the inverse of the spring coefficient of the spring of the fourth magnetoelectric antenna; the value of the first inductor is the load mass of the first magnetoelectric antenna, the value of the second inductor is the load mass of the second magnetoelectric antenna, the value of the third inductor is the load mass of the third magnetoelectric antenna, and the value of the fourth inductor is the load mass of the fourth magnetoelectric antenna; the value of the first resistor is the magneto-electric antenna damping of the first magneto-electric antenna, the value of the second resistor is the magneto-electric antenna damping of the second magneto-electric antenna, the value of the third resistor is the magneto-electric antenna damping of the third magneto-electric antenna, and the value of the fourth resistor is the magneto-electric antenna damping of the fourth magneto-electric antenna.
According to a fourth aspect of the present invention there is also provided a computer device comprising at least one processing unit and at least one storage unit, wherein the storage unit stores a computer program which, when executed by the processing unit, causes the processing unit to perform the steps of any of the methods described above.
According to a fifth aspect of the present invention there is also provided a storage medium storing a computer program for execution by a computer device, the computer program when run on the computer device causing the computer device to perform the steps of any of the methods described above.
In general, the above technical solutions conceived by the present invention, compared with the prior art, enable the following beneficial effects to be obtained:
(1) The series-parallel stacked array of the magnetoelectric antennas provided by the invention can quantitatively analyze the frequency response of the series-parallel stacked array of the magnetoelectric antennas, improve the radiation intensity of the magnetoelectric antennas, adjust the resonant frequency of the magnetoelectric antennas, expand the bandwidth of the magnetoelectric antennas and improve the coupling coefficient between the array elements of the magnetoelectric antennas.
(2) The equivalent circuit model establishing method provided by the invention can be used for quantitatively analyzing the frequency response of the series-parallel stacked array of the magnetoelectric antenna, and provides a theoretical basis for adjusting the resonant frequency of the magnetoelectric antenna, expanding the relative bandwidth, improving the amplitude, improving the radiation efficiency and the like.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are required to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a schematic diagram of a mechanical vibration model of a magneto-electric antenna according to an embodiment of the present application;
fig. 2 is a schematic diagram of an equivalent circuit model of a magneto-electric antenna according to an embodiment of the present application;
fig. 3 is a schematic diagram of a binary serial array of magneto-electric antennas according to an embodiment of the present disclosure;
fig. 4 is a schematic diagram of a binary parallel array of magneto-electric antennas according to an embodiment of the present application;
fig. 5 is a schematic diagram of a serial-parallel stacked array of magneto-electric antennas according to an embodiment of the present disclosure;
fig. 6 is a schematic flow chart of an equivalent circuit model building method provided in an embodiment of the present application;
fig. 7 is a schematic diagram of an equivalent circuit model of a serial-parallel stacked array of magneto-electric antennas according to an embodiment of the present application;
fig. 8 is a schematic diagram of frequency response of a magneto-electric antenna before and after serial-parallel stacking and array formation according to an embodiment of the present application;
Fig. 9 is a schematic structural diagram of an equivalent circuit model building device according to an embodiment of the present application;
fig. 10 is a schematic structural diagram of a computer device according to an embodiment of the present application.
Detailed Description
The present invention will be described in further detail with reference to the drawings and examples, in order to make the objects, technical solutions and advantages of the present invention more apparent. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the invention. In addition, the technical features of the embodiments of the present invention described below may be combined with each other as long as they do not collide with each other.
The terms first, second and the like in the description and in the claims of the present application and in the above-described figures, are used for distinguishing between different objects and not for describing a particular sequential order. Furthermore, the terms "comprise" and "have," as well as any variations thereof, are intended to cover a non-exclusive inclusion. For example, a process, method, system, article, or apparatus that comprises a list of steps or elements is not limited to only those listed steps or elements but may include other steps or elements not listed or inherent to such process, method, article, or apparatus.
Current research on magnetoelectric antennas generally equates the vibration process of the magnetoelectric antenna to simple harmonic vibration of magnetic charges. In general, the dynamic model of the moving magnet may be equivalently a single degree of freedom mass-spring-damping system (alternatively referred to as a vibration system).
As shown in fig. 1, in the mechanical vibration model of the magnetoelectric antenna, the magnetoelectric antenna is simplified into an ideal linear light spring vibrating in the vertical direction (i.e., OY direction), and a mechanical load (simply referred to as a load) is fixed below the spring. When the load is balanced with the tension of the magnetoelectric antenna, the antenna is elongated by delta y, and the gravity expression is: mg=kΔy, where mg is gravity, m is the load mass, and k is the spring force coefficient of the spring.
With the equilibrium position as the origin of coordinates, a coordinate system OY as shown in fig. 1 is established. When the displacement of the load relative to the equilibrium position is y, the load is subjected to two forces: the gravity of the load itself downward and the upward pulling force exerted by the magneto-electric antenna.
From newton's second law and hooke's law, the following equation can be established:
the general solution of the equation shown in equation (1) is:
y＝y m cos (2pi.f.t- ψ) formula (2)
Wherein y is m For maximum amplitude, f is the resonant frequency of the magnetoelectric antenna and ψ is the phase.
Substituting the formula (2) into the formula (1) to obtain the expression of the resonant frequency of the magnetoelectric antenna, wherein the expression is as follows:
from the definition of the quality factor Q, it is possible to:
wherein E is the total energy of the vibration system, W is the energy consumed by damping in a single vibration period, and r is the magneto-electric antenna damping.
Substituting the formula (3) and the formula (4) into the relation of the quality factor Q, the magnetoelectric antenna bandwidth B and the magnetoelectric antenna resonant frequency f, the expression of the magnetoelectric antenna bandwidth can be obtained as follows:
further, the formula (3) can be rewritten as:
equation (5) and equation (6) have similarity to the solution equation for the resonant frequency of the LC parallel resonant circuit. When a plurality of springs are connected in parallel, the total elastic coefficient is formed by superposing the elastic coefficients of the plurality of springs, so k in the formula (6) -1 Equivalent capacitance C in the LC parallel resonance circuit can be equivalently used; in addition, because the total load is equal to the sum of the loads when the magnetoelectric antenna acts in parallel with the loads, m in the formula (6) can be equivalently the equivalent inductance L in the LC parallel resonant circuit; in addition, since the magneto-electric antenna itself damps R to cause the antenna quality factor to decrease, R in the formula (5) can be equivalently the equivalent resistance R in the LC parallel resonant circuit; and the mechanical amplitude may be equivalent to the current amplitude in an LC parallel resonant circuit.
FIG. 2 is an equivalent circuit model of a magneto-electric antenna, L in the drawing 1 、C 1 、R 1 Respectively representing inductance, capacitance and resistance of the LC parallel resonant circuit. The equivalent circuit model as shown in fig. 2 can be used for performance calculation of a monolithic magneto-electric antenna, however, when the magneto-electric antenna is in an array, each physical quantity of the magneto-electric antenna (including the spring force coefficient k of the spring, the magneto-electric antenna damping r, the load massThe series-parallel relationship of the quantity m) still needs to be further defined, that is, the series-parallel relationship among all the components (including the inductance L, the capacitance C and the resistance R) in the equivalent circuit model of the magnetoelectric antenna does not correspond to the series-parallel relationship in the mechanical domain yet.
In the mechanical domain, series connection means on an extension of the direction of vibration of the spring, and parallel connection means parallel to the direction of vibration of the spring. Since the spring force coefficient k of the spring is a physical quantity related to the vibration direction, the series-parallel relationship of the spring force coefficient is identical to the series-parallel relationship between the respective components in the equivalent circuit model of the magnetoelectric antenna. The magneto-electric antenna damping r and the load mass m are independent of the vibration direction of the springs, so that the magneto-electric antenna damping r and the load mass m can only be used as system parameters for series superposition.
As can be seen from the formula (3), in order to adjust the resonant frequency of the magnetoelectric antenna, for example, to reduce the resonant frequency of the magnetoelectric antenna, it is necessary to reduce the spring force coefficient k of the spring or to increase the load mass m. As can be seen from equation (5), in order to expand the bandwidth of the magnetoelectric antenna, it is necessary to increase the magnetoelectric antenna damping r or decrease the load mass m.
Referring to the equivalent circuit model shown in FIG. 2, an additional resistor R is connected in series to improve the damping of the magneto-electric antenna 2 The method comprises the steps of carrying out a first treatment on the surface of the To reduce the spring coefficient of the spring, an additional capacitor C needs to be connected in series 2 。
As shown in fig. 3, in one embodiment, a binary serial array of magnetoelectric antennas is provided, comprising a first magnetoelectric antenna 301, a second magnetoelectric antenna 302 and a fixed restriction device 303, the fixed restriction device 303 being arranged between the first magnetoelectric antenna 301 and the second magnetoelectric antenna 302 for fixedly connecting the second magnetoelectric antenna 302 to the first magnetoelectric antenna 301 such that the vibration direction of the second magnetoelectric antenna 302 is on an extension line of the vibration direction of the first magnetoelectric antenna 301.
The first magnetoelectric antenna 301 and the second magnetoelectric antenna 302 have the same structure, and the first magnetoelectric antenna 301 and the second magnetoelectric antenna 302 each comprise an interdigital electrode film, a ferroelectric phase film and a ferromagnetic phase film which are arranged from inside to outside, and the fixing and restraining device is arranged between the ferromagnetic phase film of the first magnetoelectric antenna 301 and the ferromagnetic phase film of the second magnetoelectric antenna 302.
Specifically, referring to fig. 3, each of the first magnetoelectric antenna 301 and the second magnetoelectric antenna 302 includes five layers of materials: ferromagnetic phase film, ferroelectric phase film, interdigital electrode film, ferroelectric phase film, ferromagnetic phase film. The first magneto-electric antenna 301 and the second magneto-electric antenna 302 operate on the following principle: after the electric signal is transmitted to the interdigital electrode film, a potential difference is formed on the ferroelectric phase film, so that the ferroelectric phase film is caused to mechanically vibrate; after the mechanical vibration of the ferroelectric phase film is transmitted to the ferromagnetic phase film, the ferromagnetic phase film is deformed, and a changing magnetic field is generated.
The fixing and restraining device 303 is made of a non-magnetic material, and the non-magnetic material comprises acrylic or rubber and the like.
According to the binary serial array provided by the embodiment, the elastic coefficient of the spring can be reduced and the damping of the magnetoelectric antenna can be improved by adopting the other magnetoelectric antenna as a serial vibration system, so that the purposes of adjusting the resonant frequency of the magnetoelectric antenna and expanding the bandwidth of the magnetoelectric antenna are achieved.
However, the coupling surface of the first magnetoelectric antenna and the second magnetoelectric antenna in the binary serial array is smaller, and vibration cannot be effectively transmitted, and the radiation efficiency is thatAlpha is a constant between 0 and 1, representing the coupling coefficient. Ideally, when α is 1, it means that the first magnetoelectric antenna and the second magnetoelectric antenna (also referred to as magnetoelectric antenna array element) are completely coupled, and the radiation efficiency can reach 100%; in practical situations, because the coupling surface is small, it is difficult to use effective means for coupling, and the coupling coefficient is generally below 0.5.
Therefore, in order to increase the coupling coefficient, the contact area between the magneto-electric antenna elements needs to be increased. As shown in fig. 4, in one embodiment, a binary parallel array of magnetoelectric antennas is provided, including a third magnetoelectric antenna 304, a fourth magnetoelectric antenna 305, and a fixed restraining device 306, the fixed restraining device 306 being disposed between the third magnetoelectric antenna 304 and the fourth magnetoelectric antenna 305 for fixedly connecting the fourth magnetoelectric antenna 305 to the third magnetoelectric antenna 304 such that a vibration direction of the fourth magnetoelectric antenna 305 is parallel to a vibration direction of the third magnetoelectric antenna 304. Wherein, the third magnetoelectric antenna 304 and the fourth magnetoelectric antenna 305 have the same structure, and the third magnetoelectric antenna 304 and the fourth magnetoelectric antenna 305 each comprise an interdigital electrode film, a ferroelectric phase film and a ferromagnetic phase film which are arranged from inside to outside, and the fixing and restraining device is arranged between the ferromagnetic phase film of the third magnetoelectric antenna 304 and the ferromagnetic phase film of the fourth magnetoelectric antenna 305.
In the binary parallel array of the magnetoelectric antenna provided in the embodiment, the coupling surface between the magnetoelectric antenna array elements is large, and vibration can be effectively transferred.
Therefore, in order to achieve the purposes of simultaneously reducing the resonant frequency of the magnetoelectric antenna, expanding the bandwidth of the magnetoelectric antenna and improving the radiation efficiency of the magnetoelectric antenna, it is necessary to reduce the elastic coefficient k of the spring, improve the damping r of the magnetoelectric antenna and increase the contact area between the array elements of the magnetoelectric antenna.
Referring to the equivalent circuit model shown in FIG. 2, an additional resistor R is connected in series to improve the damping of the magneto-electric antenna 2 The method comprises the steps of carrying out a first treatment on the surface of the To reduce the spring coefficient of the spring, an additional capacitor C needs to be connected in series 2 . In practice, the corresponding series relationship in the circuit is represented by an additional damping and a vibration system connected in series in the vibration direction of the original magneto-electric antenna. But the extra resistor in series consumes more energy, so in order to avoid the field intensity of the final radiation of the magnetoelectric antenna being too low, another magnetoelectric antenna is adopted in the embodiment to be connected in series with the original magnetoelectric antenna, and the two magnetoelectric antennas together form a binary series array of the magnetoelectric antennas. And, on the coupling surface of the binary serial array, two other pieces of magnetoelectric antennas are connected in parallel, so that the contact area between the magnetoelectric antenna array elements is increased, and the four pieces of magnetoelectric antennas form a serial-parallel stacked array of magnetoelectric antennas together. Compared with a single-piece magnetoelectric antenna, the series-parallel stacked array of the magnetoelectric antenna has the advantages of low frequency, large relative bandwidth, high radiation intensity and high coupling coefficient.
As shown in fig. 5, in one embodiment, there is provided a serial-parallel stacked array of magnetoelectric antennas, including a first magnetoelectric antenna 301, a second magnetoelectric antenna 302, a third magnetoelectric antenna 304, a fourth magnetoelectric antenna 305, a first fixed constraint device, a second fixed constraint device, and a third fixed constraint device, the first fixed constraint device being disposed between the first magnetoelectric antenna 301 and the second magnetoelectric antenna 302 for fixedly connecting the second magnetoelectric antenna 302 to the first magnetoelectric antenna 301 such that a vibration direction of the second magnetoelectric antenna 302 is on an extension line of the vibration direction of the first magnetoelectric antenna 301, constituting a binary serial array of magnetoelectric antennas; the second fixing and restraining device is disposed between the third magnetoelectric antenna 304 and the binary serial array of magnetoelectric antennas, and is used for fixedly connecting the third magnetoelectric antenna 304 to the binary serial array of magnetoelectric antennas, so that the vibration direction of the third magnetoelectric antenna 304 is parallel to the vibration direction of the binary serial array of magnetoelectric antennas; the third fixing and restraining device is disposed between the fourth magnetoelectric antenna 305 and the binary serial array of magnetoelectric antennas, and is configured to fixedly connect the fourth magnetoelectric antenna 305 to the binary serial array of magnetoelectric antennas, so that the vibration direction of the fourth magnetoelectric antenna 305 is parallel to the vibration direction of the binary serial array of magnetoelectric antennas.
The first fixing and restraining device, the second fixing and restraining device and the third fixing and restraining device are all made of nonmagnetic materials, and the nonmagnetic materials comprise acrylic or rubber and the like.
The serial-parallel stacked array of the magnetoelectric antennas provided by the embodiment is characterized in that on the basis of the binary serial array of the magnetoelectric antennas, two other magnetoelectric antennas are connected in parallel, so that the contact area of the binary serial array of the original magnetoelectric antennas is increased, the coupling coefficient can be improved, and the radiation efficiency isTheoretically up to 100%; in actual conditions, when the value of alpha is 0.8-1, the radiation efficiency of the binary series array of the prior magneto-electric antenna is improved by more than 20%, and the purpose of improving the radiation efficiency is achieved. In addition, another magnetoelectric antenna is connected in series with another magnetoelectric antenna and then connected with the other two magnetoelectric antennas in parallel, although extra mechanical load is introduced, the bandwidth reduction caused by the extra mechanical load can be achieved by two physical quantities of the damping of the magnetoelectric antenna and the elasticity coefficient of the springAnd (5) row compensation.
Aiming at the problem that the current research on the magnetoelectric antenna lacks effective theoretical guidance, the establishment of an equivalent circuit model of the magnetoelectric antenna is a solution. However, unlike the conventional electric antenna, the impedance characteristic of the magneto-electric antenna is purely resistive, and cannot be matched to an equivalent circuit model by physical quantities such as inductance and capacitance.
As shown in fig. 6, an equivalent circuit model building method is provided, which is applied to the series-parallel stacked array of the magneto-electric antenna, and includes the following steps:
and 601, respectively acquiring physical quantities of the first magnetoelectric antenna, the second magnetoelectric antenna, the third magnetoelectric antenna and the fourth magnetoelectric antenna, wherein the physical quantities comprise an elastic coefficient k of a spring, a load mass m and a magnetoelectric antenna damping r.
Wherein the spring force coefficient k of the spring of the first magneto-electric antenna 1 Spring coefficient k of spring of second magneto-electric antenna 2 Spring coefficient k of spring of third magneto-electric antenna 3 Spring coefficient k of spring of fourth magneto-electric antenna 4 May be the same or different; load mass m of first magneto-electric antenna 1 Load mass m of second magneto-electric antenna 2 Load mass m of third magneto-electric antenna 3 And a load mass m of the fourth magneto-electric antenna 4 May be the same or different; magneto-electric antenna damping r of first magneto-electric antenna 1 Magneto-electric antenna damping r of second magneto-electric antenna 2 Magneto-electric antenna damping r of third magneto-electric antenna 3 And a fourth magnetoelectric antenna, the magnetoelectric antenna damping r 4 May be the same or different.
Step 602, according to the spring force coefficient k of the spring 1 、k 2 、k 3 And k 4 Load mass m 1 、m 2 、m 3 And m 4 Damping r of magneto-electric antenna 1 、r 2 、r 3 And r 4 Establishing an equivalent circuit model of the series-parallel stacked array of the magnetoelectric antenna, wherein the equivalent circuit model comprises a first capacitor C 1 A second capacitor C 2 Third capacitor C 3 Fourth capacitor C 4 First inductor L 1 Second inductance L 2 Third inductance L 3 Fourth inductance L 4 A first resistor R 1 A second resistor R 2 Third resistor R 3 Fourth resistor R 4 First capacitor C 1 And a second capacitor C 2 Series connection of a first capacitor C 1 Respectively with a third capacitor C 3 Fourth capacitor C 4 Parallel connection, a first capacitor C 1 A first resistor R 1 A second resistor R 2 Third resistor R 3 Fourth resistor R 4 Fourth inductance L 4 Third inductance L 3 Second inductance L 2 First inductor L 1 And (3) connecting in series.
Wherein, the first capacitor C 1 The value of (2) is the inverse k of the spring force coefficient of the spring of the first magnetoelectric antenna 301 1 -1 Second capacitor C 2 The value of (2) is the inverse k of the spring force coefficient of the spring of the second magneto-electric antenna 302 2 -1 Third capacitor C 3 The value of (2) is the inverse k of the spring force coefficient of the spring of the third magneto-electric antenna 304 3 -1 Fourth capacitor C 4 The value of (2) is the inverse k of the spring force coefficient of the spring of the fourth magnetoelectric antenna 305 4 -1 The method comprises the steps of carrying out a first treatment on the surface of the First inductance L 1 Is the load mass m of the first magneto-electric antenna 301 1 Second inductance L 2 Is the load mass m of the second magneto-electric antenna 302 2 Third inductance L 3 Is the load mass m of the third magneto-electric antenna 304 3 Fourth inductance L 4 Is the load mass m of the fourth magnetoelectric antenna 305 4 The method comprises the steps of carrying out a first treatment on the surface of the First resistor R 1 Is the magneto-electric antenna damping r of the first magneto-electric antenna 301 1 A second resistor R 2 Is the magneto-electric antenna damping r of the second magneto-electric antenna 302 2 Third resistor R 3 Is the magneto-electric antenna damping r of the third magneto-electric antenna 304 3 Fourth resistor R 4 Is the magneto-electric antenna damping r of the fourth magneto-electric antenna 305 4 。
FIG. 7 is an equivalent circuit model of a series-parallel stacked array of magneto-electric antennas, L in the figure 1 、C 1 、R 1 Respectively are provided withInductance, capacitance, and resistance representing equivalent LC parallel resonant circuit of first magneto-electric antenna 301, L 2 、C 2 、R 2 Respectively representing inductance, capacitance and resistance, L of an equivalent LC parallel resonant circuit of the second magneto-electric antenna 302 3 、C 3 、R 3 Respectively representing inductance, capacitance and resistance of the equivalent LC parallel resonant circuit of third magneto-electric antenna 304, L 4 、C 4 、R 4 The inductance, capacitance, and resistance of the equivalent LC parallel resonant circuit of the fourth magneto-electric antenna 305 are shown, respectively. As shown in fig. 7, in the equivalent circuit model of the serial-parallel stacked array of magneto-electric antennas, the equivalent inductance L thereof Etc Is the first inductance L 1 Second inductance L 2 Third inductance L 3 And a fourth inductance L 4 Sum of equivalent capacitance C Etc Is a third capacitor C 3 Fourth capacitor C 4 And the sum of the series capacitance, the inverse of the series capacitance is the first capacitance C 1 And a second capacitor C 2 The sum of the reciprocal of (2) equivalent resistance R Etc Is a first resistor R 1 A second resistor R 2 Third resistor R 3 And a fourth resistor R 4 A kind of electronic device.
The equivalent circuit model of the series-parallel stacked array of the magnetoelectric antennas provided in the embodiment can be used for quantitatively analyzing the frequency response of the series-parallel stacked array of the magnetoelectric antennas. The series-parallel stacked array of the magnetoelectric antenna based on the vibration theory can be used for adjusting the resonant frequency, expanding the relative bandwidth, improving the amplitude and the radiation efficiency, and providing a hardware foundation for improving the communication rate and the communication capacity.
As shown in fig. 8, a schematic diagram of frequency response of a magneto-electric antenna using iron-gallium alloy as a main material before and after serial-parallel stacking and array is provided. Wherein the left two curves represent the frequency response of the series-parallel stacked array of magneto-electric antennas in the theoretical case and the test case, respectively, and the right two curves represent the frequency response of the initial state (i.e., the monolithic magneto-electric antenna) in the theoretical case and the test case, respectively. As can be seen from fig. 8, after the serial-parallel stacking and grouping, the resonant frequency of the magnetoelectric antenna is reduced and the radiation capability is enhanced.
Based on the same inventive concept, the embodiment of the application also provides an equivalent circuit model building device for realizing the above related equivalent circuit model building method. The implementation of the solution provided by the device is similar to the implementation described in the above method, so the specific limitation in the embodiments of the device for establishing an equivalent circuit model provided in the following may be referred to the limitation of the method for establishing an equivalent circuit model, which is not described herein.
As shown in fig. 9, the present application further provides an equivalent circuit model building apparatus 900, which includes: an acquisition module 901 configured to acquire physical quantities of the first magnetoelectric antenna, the second magnetoelectric antenna, the third magnetoelectric antenna, and the fourth magnetoelectric antenna, respectively, the physical quantities including an elastic coefficient of a spring, a load mass, and a magnetoelectric antenna damping; a building module 902 configured to build an equivalent circuit model of a series-parallel stacked array of magneto-electric antennas according to an elastic coefficient of a spring, a load mass and a magneto-electric antenna damping, wherein the equivalent circuit model comprises a first capacitor, a second capacitor, a third capacitor, a fourth capacitor, a first inductor, a second inductor, a third inductor, a fourth inductor, a first resistor, a second resistor, a third resistor and a fourth resistor, the first capacitor and the second capacitor are connected in series, the first capacitor is respectively connected in parallel with the third capacitor and the fourth capacitor, and the first capacitor, the first resistor, the second resistor, the third resistor, the fourth inductor, the third inductor, the second inductor and the first inductor are connected in series; the value of the first capacitor is the inverse of the spring coefficient of the spring of the first magnetoelectric antenna, the value of the second capacitor is the inverse of the spring coefficient of the spring of the second magnetoelectric antenna, the value of the third capacitor is the inverse of the spring coefficient of the spring of the third magnetoelectric antenna, and the value of the fourth capacitor is the inverse of the spring coefficient of the spring of the fourth magnetoelectric antenna; the value of the first inductor is the load mass of the first magnetoelectric antenna, the value of the second inductor is the load mass of the second magnetoelectric antenna, the value of the third inductor is the load mass of the third magnetoelectric antenna, and the value of the fourth inductor is the load mass of the fourth magnetoelectric antenna; the value of the first resistor is the magneto-electric antenna damping of the first magneto-electric antenna, the value of the second resistor is the magneto-electric antenna damping of the second magneto-electric antenna, the value of the third resistor is the magneto-electric antenna damping of the third magneto-electric antenna, and the value of the fourth resistor is the magneto-electric antenna damping of the fourth magneto-electric antenna.
The respective modules in the equivalent circuit model creation device described above may be implemented in whole or in part by software, hardware, or a combination thereof. The above modules may be embedded in hardware or may be independent of a processor in the computer device, or may be stored in software in a memory in the computer device, so that the processor may call and execute operations corresponding to the above modules.
The application also provides an equivalent circuit model building device, which may be a computer device, and an internal structure diagram thereof may be as shown in fig. 10. The computer device includes a processor, a memory, an input/output interface, a communication interface, a display unit, and an input means. The processor, the memory and the input/output interface are connected through a system bus, and the communication interface, the display unit and the input device are connected to the system bus through the input/output interface. Wherein the processor of the computer device is configured to provide computing and control capabilities. The memory of the computer device includes a non-volatile 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 the operating system and computer programs in the non-volatile storage media. The input/output interface of the computer device is used to exchange information between the processor and the external device. The communication interface of the computer device is used for carrying out wired or wireless communication with an external terminal, and the wireless mode 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 an equivalent circuit model building method.
It will be appreciated by those skilled in the art that the structure shown in fig. 10 is merely a block diagram of some of the structures associated with the present application and is not limiting of the computer device to which the present application may be applied, and that a particular computer device may include more or fewer components than shown, or may combine certain components, or have a different arrangement of components.
The present application also provides a computer device comprising at least one processing unit and at least one storage unit, wherein the storage unit stores a computer program, which when executed by the processing unit, causes the processing unit to perform the steps of the method embodiments described above.
The present application also provides a computer readable storage medium storing a computer program executable by a computer device, which when run on the computer device causes the computer device to perform the steps of the method embodiments described above. The computer readable storage medium may include, among other things, any type of disk including floppy disks, optical disks, DVDs, CD-ROMs, micro-drives, and magneto-optical disks, ROM, RAM, EPROM, EEPROM, DRAM, VRAM, flash memory devices, magnetic or optical cards, nanosystems (including molecular memory ICs), or any type of media or device suitable for storing instructions and/or data.
It should be noted that, for simplicity of description, the foregoing method embodiments are all expressed as a series of action combinations, but it should be understood by those skilled in the art that the present application is not limited by the order of actions described, as some steps may be performed in other order or simultaneously in accordance with the present application. Further, those skilled in the art will also appreciate that the embodiments described in the specification are all preferred embodiments, and that the acts and modules referred to are not necessarily required in the present application.
In the foregoing embodiments, the descriptions of the embodiments are emphasized, and for parts of one embodiment that are not described in detail, reference may be made to related descriptions of other embodiments.
In the several embodiments provided in this application, it should be understood that the disclosed apparatus may be implemented in other ways. For example, the apparatus embodiments described above are merely illustrative, such as the division of the units, merely a logical function division, and there may be additional manners of dividing the actual implementation, such as multiple units or components may be combined or integrated into another system, or some features may be omitted, or not performed. Alternatively, the coupling or direct coupling or communication connection shown or discussed with each other may be through some service interface, device or unit indirect coupling or communication connection, electrical or otherwise.
The units described as separate units may or may not be physically separate, and units shown as units may or may not be physical units, may be located in one place, or may be distributed over a plurality of network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.
In addition, each functional unit in each embodiment of the present application may be integrated in one processing unit, or each unit may exist alone physically, or two or more units may be integrated in one unit. The integrated units may be implemented in hardware or in software functional units.
The integrated units, if implemented in the form of software functional units and sold or used as stand-alone products, may be stored in a computer readable memory. Based on such understanding, the technical solution of the present application may be embodied in essence or a part contributing to the prior art or all or part of the technical solution in the form of a software product stored in a memory, including several instructions for causing a computer device (which may be a personal computer, a server or a network device, etc.) to perform all or part of the steps of the method described in the embodiments of the present application. And the aforementioned memory includes: a U-disk, a Read-Only Memory (ROM), a random access Memory (Random Access Memory, RAM), a removable hard disk, a magnetic disk, or an optical disk, or other various media capable of storing program codes.
Those of ordinary skill in the art will appreciate that all or a portion of the steps in the various methods of the above embodiments may be implemented by a program that instructs associated hardware, and the program may be stored in a computer readable memory, which may include: flash disk, read-Only Memory (ROM), random-access Memory (Random Access Memory, RAM), magnetic or optical disk, and the like.
The foregoing is merely exemplary embodiments of the present disclosure and is not intended to limit the scope of the present disclosure. That is, equivalent changes and modifications are contemplated by the teachings of this disclosure, which fall within the scope of the present disclosure. Embodiments of the present disclosure will be readily apparent to those skilled in the art from consideration of the specification and practice of the disclosure herein. This application is intended to cover any adaptations, uses, or adaptations of the disclosure following, in general, the principles of the disclosure and including such departures from the present disclosure as come within known or customary practice within the art to which the disclosure pertains. It is intended that the specification and examples be considered as exemplary only, with a scope and spirit of the disclosure being indicated by the claims.
The technical features of the above embodiments may be arbitrarily combined, and all possible combinations of the technical features in the above embodiments are not described for brevity of description, however, as long as there is no contradiction between the combinations of the technical features, they should be considered as the scope of the description.
It will be readily appreciated by those skilled in the art that the foregoing description is merely a preferred embodiment of the invention and is not intended to limit the invention, but any modifications, equivalents, improvements or alternatives falling within the spirit and principles of the invention are intended to be included within the scope of the invention.
Claims (10)
1. The series-parallel stacked array of the magnetoelectric antennas is characterized by comprising a first magnetoelectric antenna, a second magnetoelectric antenna, a third magnetoelectric antenna, a fourth magnetoelectric antenna, a first fixed constraint device, a second fixed constraint device and a third fixed constraint device;
the first fixed constraint device is arranged between the first magnetoelectric antenna and the second magnetoelectric antenna and is used for fixedly connecting the second magnetoelectric antenna to the first magnetoelectric antenna so that the vibration direction of the second magnetoelectric antenna is on an extension line of the vibration direction of the first magnetoelectric antenna to form a binary serial array of the magnetoelectric antennas;
the second fixed constraint device is arranged between the third magnetoelectric antenna and the binary serial array of the magnetoelectric antenna and is used for fixedly connecting the third magnetoelectric antenna to the binary serial array of the magnetoelectric antenna so that the vibration direction of the third magnetoelectric antenna is parallel to the vibration direction of the binary serial array of the magnetoelectric antenna;
The third fixed constraint device is arranged between the fourth magnetoelectric antenna and the binary serial array of the magnetoelectric antenna, and is used for fixedly connecting the fourth magnetoelectric antenna to the binary serial array of the magnetoelectric antenna, so that the vibration direction of the fourth magnetoelectric antenna is parallel to the vibration direction of the binary serial array of the magnetoelectric antenna.
2. The stacked array of claim 1, wherein the first magnetoelectric antenna, the second magnetoelectric antenna, the third magnetoelectric antenna, and the fourth magnetoelectric antenna are all identical in structure and comprise an interdigital electrode film, a ferroelectric phase film, and a ferromagnetic phase film that are disposed from inside to outside, the first fixed restraint device is disposed between the ferromagnetic phase film of the first magnetoelectric antenna and the ferromagnetic phase film of the second magnetoelectric antenna, the second fixed restraint device is disposed between the ferromagnetic phase film of the third magnetoelectric antenna and the ferromagnetic phase film of the binary serial array of magnetoelectric antennas, and the third fixed restraint device is disposed between the ferromagnetic phase film of the fourth magnetoelectric antenna and the ferromagnetic phase film of the binary serial array of magnetoelectric antennas.
3. The stacked array of claim 1, wherein the first fixed constraint device, the second fixed constraint device, and the third fixed constraint device are each fabricated from a nonmagnetic material.
4. The stacked array of claim 3, wherein the nonmagnetic material comprises acrylic or rubber.
5. The series-parallel stacked array of magneto-electric antennas of claim 1, wherein physical quantities of the first magneto-electric antenna, the second magneto-electric antenna, the third magneto-electric antenna, and the fourth magneto-electric antenna are the same, the physical quantities including an elastic coefficient of a spring and a load mass, and a relationship between a resonance frequency of the first magneto-electric antenna, the second magneto-electric antenna, the third magneto-electric antenna, or the fourth magneto-electric antenna and the physical quantities is:
wherein m is the load mass, k is the elastic coefficient of the spring, and f is the resonant frequency of the magnetoelectric antenna.
6. The series-parallel stacked array of magneto-electric antennas of claim 5, wherein the physical quantity further comprises magneto-electric antenna damping, and a relationship between a bandwidth of the first magneto-electric antenna, the second magneto-electric antenna, the third magneto-electric antenna, or the fourth magneto-electric antenna and the physical quantity is:
Wherein r is magneto-electric antenna damping, and B is magneto-electric antenna bandwidth.
7. An equivalent circuit model building method, characterized by being applied to the series-parallel stacked array of magneto-electric antennas as claimed in any one of claims 1-6, comprising:
respectively acquiring physical quantities of the first magnetoelectric antenna, the second magnetoelectric antenna, the third magnetoelectric antenna and the fourth magnetoelectric antenna, wherein the physical quantities comprise an elastic coefficient of a spring, load mass and magnetoelectric antenna damping;
establishing an equivalent circuit model of a series-parallel stacked array of the magnetoelectric antenna according to the elastic coefficient of the spring, the load mass and the magnetoelectric antenna damping, wherein the equivalent circuit model comprises a first capacitor, a second capacitor, a third capacitor, a fourth capacitor, a first inductor, a second inductor, a third inductor, a fourth inductor, a first resistor, a second resistor, a third resistor and a fourth resistor, the first capacitor and the second capacitor are connected in series, the first capacitor is respectively connected in parallel with the third capacitor and the fourth capacitor, and the first capacitor, the first resistor, the second resistor, the third resistor, the fourth inductor, the third inductor, the second inductor and the first inductor are connected in series; the value of the first capacitor is the inverse of the spring coefficient of the spring of the first magnetoelectric antenna, the value of the second capacitor is the inverse of the spring coefficient of the spring of the second magnetoelectric antenna, the value of the third capacitor is the inverse of the spring coefficient of the spring of the third magnetoelectric antenna, and the value of the fourth capacitor is the inverse of the spring coefficient of the spring of the fourth magnetoelectric antenna; the value of the first inductor is the load mass of the first magnetoelectric antenna, the value of the second inductor is the load mass of the second magnetoelectric antenna, the value of the third inductor is the load mass of the third magnetoelectric antenna, and the value of the fourth inductor is the load mass of the fourth magnetoelectric antenna; the value of the first resistor is the magneto-electric antenna damping of the first magneto-electric antenna, the value of the second resistor is the magneto-electric antenna damping of the second magneto-electric antenna, the value of the third resistor is the magneto-electric antenna damping of the third magneto-electric antenna, and the value of the fourth resistor is the magneto-electric antenna damping of the fourth magneto-electric antenna.
8. An equivalent circuit model building device, characterized by being applied to the series-parallel stacked array of magneto-electric antennas as claimed in any one of claims 1-6, comprising:
an acquisition module configured to acquire physical quantities of the first magnetoelectric antenna, the second magnetoelectric antenna, the third magnetoelectric antenna, and the fourth magnetoelectric antenna, respectively, the physical quantities including an elastic coefficient of a spring, a load mass, and a magnetoelectric antenna damping;
a building module configured to build an equivalent circuit model of a series-parallel stacked array of magneto-electric antennas according to an elastic coefficient of the spring, the load mass and the magneto-electric antenna damping, wherein the equivalent circuit model comprises a first capacitor, a second capacitor, a third capacitor, a fourth capacitor, a first inductor, a second inductor, a third inductor, a fourth inductor, a first resistor, a second resistor, a third resistor and a fourth resistor, the first capacitor and the second capacitor are connected in series, the first capacitor is respectively connected in parallel with the third capacitor and the fourth capacitor, and the first capacitor, the first resistor, the second resistor, the third resistor, the fourth inductor, the third inductor, the second inductor and the first inductor are connected in series; the value of the first capacitor is the inverse of the spring coefficient of the spring of the first magnetoelectric antenna, the value of the second capacitor is the inverse of the spring coefficient of the spring of the second magnetoelectric antenna, the value of the third capacitor is the inverse of the spring coefficient of the spring of the third magnetoelectric antenna, and the value of the fourth capacitor is the inverse of the spring coefficient of the spring of the fourth magnetoelectric antenna; the value of the first inductor is the load mass of the first magnetoelectric antenna, the value of the second inductor is the load mass of the second magnetoelectric antenna, the value of the third inductor is the load mass of the third magnetoelectric antenna, and the value of the fourth inductor is the load mass of the fourth magnetoelectric antenna; the value of the first resistor is the magneto-electric antenna damping of the first magneto-electric antenna, the value of the second resistor is the magneto-electric antenna damping of the second magneto-electric antenna, the value of the third resistor is the magneto-electric antenna damping of the third magneto-electric antenna, and the value of the fourth resistor is the magneto-electric antenna damping of the fourth magneto-electric antenna.
9. A computer device comprising at least one processing unit, and at least one storage unit, wherein the storage unit stores a computer program which, when executed by the processing unit, causes the processing unit to perform the steps of the method of claim 7.
10. A storage medium storing a computer program for execution by a computer device, the computer program, when run on the computer device, causing the computer device to perform the steps of the method of claim 7.
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| CN202311703578.9A CN117712670B (en) | 2023-12-11 | Equivalent circuit model building method for series-parallel stacked array of magnetoelectric antenna |
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| CN202311703578.9A CN117712670B (en) | 2023-12-11 | Equivalent circuit model building method for series-parallel stacked array of magnetoelectric antenna |
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| CN114069258A (en) * | 2020-11-18 | 2022-02-18 | 温彻斯特科技责任有限公司 | Magnetoelectric antenna array and application thereof |
| CN116632498A (en) * | 2023-05-17 | 2023-08-22 | 中国人民解放军海军工程大学 | Magneto-electric antenna and tuning method based on equivalent circuit model thereof |
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| CN114069258A (en) * | 2020-11-18 | 2022-02-18 | 温彻斯特科技责任有限公司 | Magnetoelectric antenna array and application thereof |
| CN116632498A (en) * | 2023-05-17 | 2023-08-22 | 中国人民解放军海军工程大学 | Magneto-electric antenna and tuning method based on equivalent circuit model thereof |
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