Wireless energy transmission efficiency optimization method under non-uniform incident power distribution

Abstract

The invention discloses a wireless energy transmission efficiency optimization method under non-uniform incident power distribution, relates to the technical field of electromagnetic fields and microwaves, and aims to express the rectification efficiency of a whole system as a specific function form by adopting a mathematical fitting technology. Therefore, a complex wireless energy transmission system efficiency optimization problem is converted into a problem of solving a mathematical expression with constraints; according to the method, the influence of non-uniform distribution of incident power density on a receiving array in a near-field environment is fully considered, and the problem that the design of a rear-end rectifying circuit is complicated due to distribution difference is effectively avoided; compared with an existing optimization scheme, the optimization method is simpler in structure and efficient and convenient in calculation process, and has remarkable application advantages; in addition, the method is suitable for various wireless energy transmission scenes, and particularly shows excellent practicability and reliability in a complex electromagnetic environment needing efficient energy collection and utilization.

Description

Technical Field

[0001] The present invention relates to the field of electromagnetic fields and microwave technologies, and particularly to a method for optimizing the wireless energy transmission efficiency under a non-uniform incident power distribution. Background Art

[0002] For a wireless energy transmission system, the power transmission efficiency (PTE) between the transmitter and the receiver is the most important measurement criterion. In the far-field region, the power density of the incident microwave energy is evenly distributed on the receiver. In this case, the PTE of the wireless energy transmission system can be determined by the traditional Friis transmission equation.

[0003] To improve the PTE, using large-aperture transmitting and receiving arrays is an effective method. However, as the aperture area increases, the wireless energy transmission will enter the near-field region. In the near-field environment, the distribution of the incident power density on the receiving array becomes non-uniform, resulting in different power levels received by each array element. In addition, in some cases, such as in a wireless energy transmission system with a continuously changing transmission distance, the power density distribution may also change. Therefore, the non-uniformity and variability of the power distribution under near-field conditions bring difficulties to the design of the backend rectifier circuit, and it is very difficult to obtain a high rectification efficiency in this case. Summary of the Invention

[0004] To solve the above technical problems, the present invention provides a method for optimizing the wireless energy transmission efficiency under a non-uniform incident power distribution, including the following steps:

[0005] S1. For the receiving antenna array in the wireless energy transmission system, the receiving antenna array includes a plurality of receiving antenna units. For the rectifier circuits respectively corresponding to each receiving antenna unit, obtain the input power, load resistance, and DC output voltage respectively corresponding to each rectifier circuit.

[0006] S2. For the input power, load resistance, and DC output voltage respectively corresponding to each rectifier circuit, construct the output voltage function and rectification efficiency function respectively corresponding to each receiving antenna unit. The output voltage function and rectification efficiency function take the input power and load resistance as parameters.

[0007] S3. Based on the output voltage function and rectification efficiency function respectively corresponding to each receiving antenna unit, construct the objective function of the receiving antenna array, and then obtain the maximum rectification efficiency and the optimal load resistance value respectively corresponding to each rectifier circuit in the receiving antenna array.

[0008] The further limited technical solution of the present invention is:

[0009] Further, in step S1, the receiving antenna array is composed of multiple receiving antenna units, and each unit is connected to the rectifying circuit through a feeder to convert the received radio frequency signal into direct current electrical energy; the receiving antenna units are arranged in an array structure, and each unit independently receives signals and is associated with the rectifying circuit.

[0010] For the method for optimizing the wireless energy transmission efficiency under a non-uniform incident power distribution as described above, in step S2, a fitting method is used to construct the output voltage function and the rectification efficiency function respectively corresponding to each receiving antenna unit, and the formulas are as follows:

[0011]

[0012] Among them, V out represents the DC output voltage, P in represents the input power, R represents the load resistance, PCE represents the rectification efficiency, v() represents the output voltage function, and e() represents the rectification efficiency function; m and n are integers, a mn and b mn represent the coefficients of the (m, n)th term of the function, P in n represents the input power at the n value, and R m represents the load resistance at the m value.

[0013] For the method for optimizing the wireless energy transmission efficiency under a non-uniform incident power distribution as described above, step S3 specifically includes the following sub-steps:

[0014] S3.1. Based on the output voltage function and the rectification efficiency function respectively corresponding to each receiving antenna unit, construct the objective function of the receiving antenna array;

[0015] S3.2. Construct the constraint conditions corresponding to the objective function of the receiving antenna array;

[0016] S3.3. Based on the objective function and the constraint conditions, solve to obtain the maximum rectification efficiency and the optimal load resistance value respectively corresponding to each rectifying circuit in the receiving antenna array.

[0017] For the method for optimizing the wireless energy transmission efficiency under a non-uniform incident power distribution as described above, in step S3.1, the objective function formula is as follows:

[0018]

[0019] Among them, P in i represents the input power corresponding to the rectifying circuit of the i-th receiving antenna unit, e i represents the rectification efficiency function corresponding to the rectifying circuit of the i-th receiving antenna unit, and R i$R_i$ represents the load resistance corresponding to the rectifying circuit of the $i$-th receiving antenna element, and $N$ represents the total number of receiving antenna elements in the receiving antenna array, that is, the total number of rectifying circuits.

[0020] For an optimization method of wireless energy transfer efficiency under a non-uniform incident power distribution as described above, in step S3.2, the constraint condition formula is as follows:

[0021]

[0022] s.t. v 1 (P in 1 , R 1 ) = v 2 (P in 2 , R 2 ) =... = v N (P in N , R N )

[0023] Wherein, v i () represents the voltage function of the $i$-th rectifying circuit.

[0024] For an optimization method of wireless energy transfer efficiency under a non-uniform incident power distribution as described above, the formula of the voltage function v i () of the $i$-th rectifying circuit is as follows:

[0025]

[0026] Wherein, $i$ represents the relevant parameters of the $i$-th rectifying circuit.

[0027] For an optimization method of wireless energy transfer efficiency under a non-uniform incident power distribution as described above, in step S3.3, using the mathematical traversal method, all possible functions v i and e i as well as the efficiencies corresponding to the load resistance $R i are calculated once, and then the extreme value of the efficiency is selected; the load resistance value corresponding to the extreme value of the efficiency is the optimal load resistance value; therefore, the maximum rectification efficiency and the optimal load resistance value corresponding to each rectifying circuit are solved; after obtaining the above parameters, rectifying circuits that meet the input power, load resistance value, and efficiency are designed and fabricated, and then connected to each receiving antenna element in the receiving antenna array; the load resistances of each rectifying circuit are connected in parallel to form the entire system.

[0028] For an optimization method of wireless energy transfer efficiency under a non-uniform incident power distribution as described above, in step S1, a metal layer of copper foil is covered on the transceiver antenna array and the rectifying circuit dielectric substrate in the wireless energy transfer system.

[0029] As described above, in an optimization method for wireless energy transfer efficiency under a non-uniform incident power distribution, in step S1, the transmitting antenna in the wireless energy transfer system adopts a 16×16 array structure and is attached with a layer of parasitic patch layer; the antenna array operates at 5.8 GHz, and the substrate of the parasitic patch layer uses Rogers4003 with a dielectric constant of 3.55 and a loss tangent of 0.0027.

[0030] The beneficial effects of the present invention are:

[0031] In the present invention, the rectification efficiency of the entire system is expressed in the form of a function by using the method of mathematical fitting, so that the problem of optimizing the efficiency of the wireless energy transfer system is transformed into the problem of solving a mathematical expression with constraint terms, which is simpler and easier to calculate than the optimization schemes in the prior art, thus well solving the problem that the design of the backend rectification circuit is difficult due to the non-uniform distribution of the incident power density on the receiving array in the near-field environment. Description of the Drawings

[0032] Figure 1 It is a schematic diagram of the principle of the rectification circuit in the embodiment of the present invention;

[0033] Figure 2 It is a schematic diagram of the structure of the wireless energy transfer system under a non-uniform incident power density distribution in the embodiment of the present invention;

[0034] Figure 3 It is a schematic diagram of the unit structure of the transmitting antenna array in the embodiment of the present invention, where (a) is a schematic diagram of the radiation patch unit and (b) is a schematic diagram of the parasitic patch unit;

[0035] Figure 4 It is a schematic diagram of the S parameters of the transmitting antenna array in the embodiment of the present invention;

[0036] Figure 5 It is a schematic diagram of the S parameters of ports 1, 5, and 6 of the receiving antenna array in the embodiment of the present invention;

[0037] Figure 6 It is a schematic diagram of the isolation degree of port 6 of the receiving antenna array in the embodiment of the present invention;

[0038] Figure 7 It is a schematic diagram of the principle of the rectification circuit in the embodiment of the present invention;

[0039] Figure 8 It is a schematic diagram of the rectification efficiency of the rectification circuit in the embodiment of the present invention;

[0040] Figure 9Schematic diagram for comparison of rectification efficiency before and after optimization at different distances in the embodiments of the present invention. Among them, Figure (a) is the schematic diagram for comparison of rectification efficiency before and after optimization at a distance of 200 mm, Figure (b) is the schematic diagram for comparison of rectification efficiency before and after optimization at a distance of 400 mm, Figure (c) is the schematic diagram for comparison of rectification efficiency before and after optimization at a distance of 600 mm, and Figure (d) is the schematic diagram for comparison of rectification efficiency before and after optimization at a distance of 800 mm. Detailed implementation manners

[0041] A method for optimizing the wireless energy transmission efficiency under non-uniform incident power distribution provided in this embodiment. When the incident power density distribution is non-uniform, the power received by each unit of the array antenna is different. In some cases, the power density distribution may change, and then the ratio of the power received between each unit of the antenna will also change. The method for optimizing the wireless energy transmission efficiency under non-uniform incident power distribution in this embodiment includes the following steps:

[0042] S1. For the receiving antenna array in the wireless energy transmission system, the receiving antenna array includes a plurality of receiving antenna units. For the rectifier circuits respectively corresponding to each receiving antenna unit, obtain the input power, load resistance, and DC output voltage respectively corresponding to each rectifier circuit.

[0043] The receiving antenna array is composed of multiple receiving antenna units. Each unit is connected to the rectifier circuit through a feeder to convert the received radio frequency signal into DC electrical energy. The receiving antenna units are arranged in an array structure, and each unit independently receives signals and is associated with the rectifier circuit. The input power, load resistance, and output voltage of the rectifier circuit affect each other. When designing, the signal strength, array layout, and load matching need to be considered to ensure the power balance and efficient operation of the system. The specific forms of the antenna units and arrays applicable to this embodiment are not limited. In the embodiment, microstrip patch antenna units and equally spaced microstrip antenna arrays are adopted. The transceiver antenna array and the rectifier circuit in the wireless energy transmission system are covered with a metal layer of copper foil on the dielectric substrate, and the thickness is set to 35 μm.

[0044] S2. For the input power, load resistance, and DC output voltage respectively corresponding to each rectifier circuit, construct the output voltage function and rectification efficiency function respectively corresponding to each receiving antenna unit. The output voltage function and rectification efficiency function take the input power and load resistance as parameters.

[0045] The fitting method is used to construct the output voltage function and rectification efficiency function respectively corresponding to each receiving antenna unit. The formulas are as follows:

[0046]

[0047] Among them, V out represents the DC output voltage, P inLet \(P\) denote the input power, \(R\) denote the load resistance, \(PCE\) denote the rectification efficiency, \(v()\) denote the output voltage function, and \(e()\) denote the rectification efficiency function; \(m\) and \(n\) are integers, and \(a\) mn , \(b\) mn denote the coefficients of the \((m,n)\) -th term of the function, \(P\) in n denotes the input power at the \(n\) -th value, and \(R\) m denotes the load resistance at the \(m\) -th value.

[0048] S3. Based on the output voltage functions and rectification efficiency functions corresponding to each receiving antenna unit, construct the objective function of the receiving antenna array, and then obtain the maximum rectification efficiency and the optimal load resistance value corresponding to each rectifier circuit in the receiving antenna array; Step S3 specifically includes the following sub - steps:

[0049] S3.1. Based on the output voltage functions and rectification efficiency functions corresponding to each receiving antenna unit, construct the objective function of the receiving antenna array. The formula of the objective function is as follows:

[0050]

[0051] where \(P\) in i denotes the input power corresponding to the rectifier circuit of the \(i\) -th receiving antenna unit, \(e\) i denotes the rectification efficiency function corresponding to the rectifier circuit of the \(i\) -th receiving antenna unit, \(R\) i denotes the load resistance corresponding to the rectifier circuit of the \(i\) -th receiving antenna unit, and \(N\) denotes the total number of receiving antenna units in the receiving antenna array, that is, the total number of rectifier circuits.

[0052] S3.2. Construct the constraint conditions corresponding to the objective function of the receiving antenna array. The formula of the constraint conditions is as follows:

[0053]

[0054] s.t. \(v\) 1 (P in 1 , \(R\) 1 ) = \(v\) 2 (P in 2 , \(R\) 2 ) = \(\cdots\) = \(v\) N (P in N , \(R\) N )

[0055] where \(v\) i () denotes the voltage function of the \(i\) -th rectifier circuit.

[0056] S3.3. Solve to obtain the maximum rectification efficiency and the optimal load resistance value corresponding to each rectifier circuit in the receiving antenna array based on the objective function and the constraint conditions; based on the objective function and the constraint conditions, combined with a preset database, use the traversal method to solve to obtain the maximum rectification efficiency and the optimal load resistance value corresponding to each rectifier circuit in the receiving antenna array.

[0057] Using the mathematical traversal method, calculate the efficiency corresponding to all possible functions v i and e i as well as the load resistance R i once, and then select the extreme value of the efficiency; the load resistance value corresponding to the extreme value of the efficiency is the optimal load resistance value; therefore, solve for the maximum rectification efficiency and the optimal load resistance value corresponding to each rectifier circuit respectively; after obtaining the above parameters, design and fabricate each rectifier circuit that meets the input power, load resistance value, and efficiency, and then connect them to each receiving antenna unit in the receiving antenna array; the load resistances of each rectifier circuit are connected in parallel to form the entire system.

[0058] As Figure 1 shown, for a rectifier circuit with a fixed internal structure (including transmission line structure, diode topology, etc.), for each input power Pi n and the value of the load resistance R, the corresponding voltage V out can be obtained, and the relationship between these three quantities can be obtained through simulation or test sampling.

[0059] Based on the sampling values, mathematical fitting can be used to determine the relationship between the three quantities and finally expressed as a mathematical expression or stored in the form of a data table, so that the voltage V out and the efficiency PCE can be expressed as functions of P in and R.

[0060] As Figure 2 shown, in this energy transmission system, the radio frequency power P Tx is fed to the transmitting antenna array and radiated in the form of electromagnetic waves, and then the electromagnetic wave signal is received by the receiving antenna array elements. The radio frequency power received by each array unit can be expressed as P in1 , P in2 to P inN ; since the receiving elements are located in the near-field region of the radiation of the transmitting antenna array, the received power P in1 , P in2 to P inN are different; using the method of DC power combination, each receiving element is connected to a separate rectifier circuit for DC power conversion, and each rectifier circuit has a backend resistive load R 1 , R 2 to R NThe output DC voltages generated above are V out1 , V out2 to V outN ; The power conversion efficiency of the rectifier circuit in this wireless energy transmission system can be expressed by ηPCE. In practical applications, since the DC voltages output by the rectifier circuit are usually combined onto one load, the voltages of V out1 , V out2 to V outN are equal. Then, the method for optimizing ηPCE in the wireless energy transmission system is transformed into solving a mathematical problem with constraint terms.

[0061] Method of power combination: In the wireless energy transmission system, the rectifier circuit is used to convert the RF power received by the antenna into DC power. Generally, there are two power combination methods, namely RF power combination and DC power combination; The purpose of this embodiment is to solve the problem in the near-field non-uniform incident power environment, and the RF power combination network can only handle a fixed ratio of input power. Therefore, the method adopted in this embodiment is DC power combination.

[0062] As Figure 3 shown, the transmitting antenna of this embodiment adopts a 16×16 array structure and is attached with a layer of parasitic patches to improve the gain. The distance between the radiation patch layer and the parasitic patch layer is H 1 ; The antenna array operates at 5.8 GHz. The substrates of both the radiation patch layer and the parasitic patch layer adopt Rogers4003, with a dielectric constant of 3.55 and a loss tangent of 0.0027. As shown in Table 1 below, the size description of the transmitting antenna array is provided.

[0063] Table 1

[0064]

[0065] Process the transmitting antenna array according to the designed size. The overall size of the antenna array is 420 mm×420 mm.

[0066] As Figure 4 shown, the S parameters of the transmitting antenna array in this embodiment are provided. The antenna array resonates at 5.9 GHz, and the S parameters are lower than -10 dB in the frequency band range of 5.8 GHz - 6.1 GHz, meeting the design requirements.

[0067] In this embodiment, a 2×2 small array is used as the large unit of the receiving antenna, and the 8×8 receiving antenna array is re-divided to form a 4×4 antenna array. That is, each large unit is composed of four small radiation patch units. The structure of the radiation patch unit is the same as that of the basic unit of the transmitting antenna, but the size is different. As shown in Table 2 below, the size description of the receiving antenna array is provided, and the simulated gain of the receiving antenna array at 5.8 GHz is 8.29 dBi.

[0068] Table 2

[0069]

[0070] As Figure 5 shown, it is the schematic diagram of the S parameters of the receiving antenna array in this embodiment. Since the receiving antenna array is a symmetric structure, only the S parameters of ports 1, 5, and 6 need to be measured to represent the entire receiving antenna. The antenna resonates at 5.8 GHz, and the S parameter is lower than -15 dB, meeting the standard of a receiving antenna.

[0071] As Figure 6 shown, it is the schematic diagram of the isolation of the receiving antenna array in this embodiment. It is known that the farther the distance between ports, the better the isolation. Taking port 6 as an example, only the isolation with the three closest ports needs to be measured. The isolation S 6，7 、S 6，10 and S 6，11 are all lower than -40 dB within the working frequency band. According to the symmetric structure, it can be concluded that the isolation of other ports also meets the design requirements.

[0072] In this embodiment, the transmission effect between array antennas is tested in an anechoic chamber. The distance between the receiving and transmitting antenna arrays is d. When the transmit power is fixed at 0 dBm, the received power levels at ports 1, 5, and 6 of the receiving antenna array are measured respectively when d is 200 mm, 400 mm, 600 mm, and 800 mm. The results are shown in Table 3 below.

[0073] Table 3

[0074]

[0075] As Figure 7 shown, it is the schematic diagram of the rectifier circuit in this embodiment. The circuit operates at 5.8 GHz, the dielectric substrate material is Rogers4350B, the dielectric constant is 3.66, and the load R load = 350 Ω. As shown in Table 4 below, the size description of the rectifier circuit is provided.

[0076] Table 4

[0077]

[0078] As Figure 8 shown, a schematic diagram of the efficiency curve of the rectifier circuit in this embodiment is given. When the input power is 16 dBm, the rectification efficiency reaches the maximum value of 62%. Based on the relationship between the input power and the rectification efficiency, the fitting function curve among the input power, load resistance, and rectification efficiency of the rectifier circuit in this embodiment can be plotted using MATLAB software. When the internal structure of the rectifier circuit is determined, each fixed input power P in and load resistance R can generate a corresponding voltage V out . Through a large number of simulations and actual measurement samplings, according to the efficiency calculation formula, the functional relationship among P in , R, and the rectification efficiency PCE can be fitted.

[0079] When the receiving antenna array is connected to the rectifier circuit in this embodiment, 16 large units of the receiving antenna array are connected to 16 rectifier circuits, and the outputs of each rectifier are connected to a total load R using the method of DC power combination.

[0080] As Figure 9 shown, a comparison chart of PCE before and after optimization at different distances is given. Using the method for optimizing the wireless energy transfer efficiency proposed in this embodiment, the value of the total load when ηPCE takes the maximum value is calculated at different transmission distances. At four transmission distances, the highest efficiency of the optimized PCE curve has been greatly improved, and the efficiency peak can be reached at a lower input power, significantly improving the rectification performance.

[0081] This embodiment designs a method for optimizing the wireless energy transfer efficiency under a non-uniform incident power density distribution. The rectification efficiency of the entire system is expressed in functional form using the method of mathematical fitting, thus transforming the problem of optimizing the efficiency of the wireless energy transfer system into a problem of solving a mathematical expression with constraint terms. This method is simpler and more convenient for calculation compared to other optimization schemes, thus well solving the problem that the uneven incident power density distribution on the receiving array in the near-field environment makes the design of the backend rectifier circuit difficult.

[0082] In addition to the above embodiments, the present invention may have other embodiments. All technical solutions formed by equivalent replacement or equivalent transformation fall within the protection scope required by the present invention.

Claims

1. A method for optimizing wireless energy transmission efficiency under non-uniform incident power distribution, characterized in that: The following steps are involved: S1. For a receiving antenna array in a wireless energy transmission system, the receiving antenna array includes a plurality of receiving antenna units. For a rectifier circuit corresponding to each receiving antenna unit, the input power, load resistance and DC output voltage corresponding to each rectifier circuit are obtained. S2. Constructing output voltage functions and rectification efficiency functions corresponding to each receiving antenna unit according to the input power, load resistance and DC output voltage corresponding to each rectification circuit, wherein the output voltage function and rectification efficiency function take the input power and load resistance as parameters; S3. Based on the output voltage function and rectification efficiency function corresponding to each receiving antenna unit, an objective function of the receiving antenna array is constructed to obtain the maximum rectification efficiency and optimal load resistance value corresponding to each rectification circuit in the receiving antenna array.

2. The method for optimizing wireless energy transmission efficiency under non-uniform incident power distribution according to claim 1, characterized in that: In step S1, the receiving antenna array is composed of multiple receiving antenna units, each unit is connected to the rectifier circuit through a feeder line to convert the received radio frequency signal into direct current power; the receiving antenna units are arranged in an array structure, each unit receives the signal independently and is associated with the rectifier circuit.

3. The method for optimizing wireless energy transmission efficiency under non-uniform incident power distribution according to claim 1, characterized in that: In step S2, a fitting method is used to construct the output voltage function and rectification efficiency function corresponding to each receiving antenna unit, which are shown as follows: Among them, V out Indicates the DC output voltage, P in represents input power, R represents load resistance, PCE represents rectification efficiency, v() represents output voltage function, e() represents rectification efficiency function; m and n are integers, a mn , b mn represents the coefficient of the (m, n)th term of the function, P in n represents the input power under n value, R m Indicates the load resistance under the m value.

4. The method for optimizing wireless energy transmission efficiency under non-uniform incident power distribution according to claim 1, characterized in that: The step S3 specifically The following steps are included: S3.1, constructing an objective function of the receiving antenna array based on the output voltage function and the rectification efficiency function corresponding to each receiving antenna unit; S3.2, construct the constraints corresponding to the objective function of the receiving antenna array; S3.

3. Based on the objective function and constraints, obtain the maximum rectification efficiency and optimal load resistance value corresponding to each rectification circuit in the receiving antenna array.

5. The method for optimizing wireless energy transmission efficiency under non-uniform incident power distribution according to claim 4, characterized in that: In step S3.1, the objective function formula is as follows: Among them, P in i represents the input power corresponding to the rectifier circuit of the i-th receiving antenna unit, e i Represents the rectification efficiency function corresponding to the rectification circuit of the i-th receiving antenna unit, R i represents the load resistance corresponding to the rectifier circuit of the i-th receiving antenna unit, and N represents the total number of receiving antenna units in the receiving antenna array, that is, the total number of rectifier circuits.

6. The method for optimizing wireless energy transmission efficiency under non-uniform incident power distribution according to claim 5, characterized in that: In step S3.2, the constraint condition formula is as follows: s.t.v1(P in 1 ,R1)=v2(P in 2 ,R2)=…=v N (P in N ,R N ) Among them, v i () represents the voltage function of the i-th rectifier circuit.

7. The method for optimizing wireless energy transmission efficiency under non-uniform incident power distribution according to claim 6, characterized in that: The voltage function v of the i-th rectifier circuit i The announcement of () is as follows: Wherein, i represents the relevant parameters of the i-th rectifier circuit.

8. The method for optimizing wireless energy transmission efficiency under non-uniform incident power distribution according to claim 4, characterized in that: In step S3.3, a mathematical traversal method is used to find all possible functions v i and e i And the load resistance R i The corresponding efficiencies are calculated once, and then the efficiency extreme value is selected; the corresponding load resistance value when the efficiency takes the extreme value is the optimal load resistance value; therefore, the maximum rectification efficiency and the optimal load resistance value corresponding to each rectifier circuit are solved; after obtaining the above parameters, each rectifier circuit that meets the input power, load resistance value and efficiency is designed and processed, and then connected to each receiving antenna unit in the receiving antenna array; the load resistance of each rectifier circuit is connected in parallel to form the entire system.

9. The method for optimizing wireless energy transmission efficiency under non-uniform incident power distribution according to claim 1, characterized in that: In the step S1, the transceiver antenna array and the rectifier circuit dielectric substrate in the wireless energy transmission system are covered with a metal layer of copper foil.

10. The method for optimizing wireless energy transmission efficiency under non-uniform incident power distribution according to claim 9, characterized in that: In step S1, the transmitting antenna in the wireless energy transmission system The antenna array adopts a 16×16 array structure and an additional parasitic patch layer; the antenna array operates at 5.8GHz. The substrate of the parasitic patch layer is Rogers4003, with a dielectric constant of 3.55 and a loss tangent of 0.0027.

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