Wide input power flexible rectification circuit with adaptive power distribution network

Abstract

The invention belongs to the technical field of electromagnetic waves, and discloses a wide input power flexible rectification circuit with an adaptive power distribution network, which comprises a dielectric substrate; a rectifying circuit; a direct-current and alternating-current isolating capacitor; a Schottky diode; an adaptive power distribution network; an equivalent grounding plate; the circuit gives full play to the advantages, including excellent flexibility, repairability, reconfigurability, fatigue resistance and corrosion resistance, of the liquid gallium-indium alloy composite material and the flexible dielectric substrate, so that the circuit still keeps stable performance in a dynamic environment. Compared with a traditional rigid rectification circuit, the design can realize efficient electromagnetic wave receiving and rectification conversion, has good adaptability, can normally work under complex curved surface structures and deformation conditions, and provides a more flexible and reliable solution for long-distance wireless energy transmission.

Description

Technical Field

[0001] The present invention belongs to the technical field of electromagnetic waves, and in particular relates to a wide input power flexible rectifier circuit with an adaptive power distribution network. Background Art

[0002] Microwave Power Transmission (MPT) technology utilizes electromagnetic waves in space as an energy transmission medium to achieve long-distance, efficient wireless energy transmission. This technology has demonstrated significant application value in areas such as space exploration, drone powering, and IoT device powering. Within the entire MPT system, the receiving rectenna plays a crucial role, and its performance directly impacts the system's energy conversion efficiency. The rectenna primarily consists of two core components: a receiving antenna for efficiently capturing microwave energy transmitted through space, and a microwave rectifier circuit responsible for microwave-to-direct current (MW-DC) conversion. The rectification efficiency of the rectifier circuit is affected by a variety of factors, including input power level, load impedance matching, the performance of the rectifier diode, and the optimized design of the matching network. To adapt to varying input power conditions, the rectifier circuit needs to have a wide power dynamic range to ensure efficient energy conversion at varying power inputs, thereby improving the stability and adaptability of the overall system.

[0003] However, the application of traditional rectifier circuits based on rigid dielectric substrates in flexible electronics and wearable devices is limited. Due to their inability to bend or poor bending performance, rigid rectifier circuits not only affect user comfort but also increase overall size due to their inability to conform to the device surface, making them difficult to meet miniaturization and lightweight design requirements. Furthermore, in complex environments, the durability and reliability of rigid circuits may be affected, limiting their adaptability in dynamic scenarios. In contrast, rectifier circuits made of flexible materials offer excellent flexibility and ductility. They can achieve efficient microwave rectification while conforming tightly to flexible or curved substrates, making them more flexible and reliable when applied to complex surfaces. Flexible rectifier circuits offer significant technical advantages and broad application prospects, particularly in fields requiring high structural and mechanical flexibility, such as IoT wearables, implantable medical devices, intelligent sensor systems, and aerospace. Therefore, developing flexible rectifier circuits that combine efficient rectification with excellent bending performance has become a key challenge in promoting the development of microwave energy harvesting technology.

[0004] Through the above analysis, the problems and defects of the existing technology are as follows:

[0005] (1) The application of traditional rectifier circuits based on hard dielectric substrates in flexible electronic devices and wearable devices is limited.

[0006] (2) Since the rigid rectifier circuit cannot be bent or has poor bending performance, it not only affects the user's wearing comfort, but also cannot conform to the surface of the device, resulting in an increase in the overall volume, making it difficult to meet the design requirements of miniaturization and lightweighting. Summary of the Invention

[0007] In view of the problems existing in the prior art, the present invention provides a wide input power flexible rectifier circuit with an adaptive power distribution network.

[0008] The present invention is implemented as follows: a wide input power flexible rectifier circuit with an adaptive power distribution network includes:

[0009] Dielectric substrate; rectifier circuit; capacitor for blocking DC and passing AC; Schottky diode; adaptive power distribution network; equivalent ground plane;

[0010] The dielectric substrate is used as the main supporting structure, and the rectifier circuit is closely attached to the upper surface of the substrate;

[0011] An equivalent ground plane is set at the bottom of the substrate. The feed interface is connected from the side, and the high input power and low input power rectification branches are connected in parallel through a microstrip line. Then, impedance matching is achieved through the adaptive power distribution network (APDN) and connected to the DC-blocking AC capacitor.

[0012] The large capacitor is connected to the diode and the pass-through filter. The lower end of the diode is connected to the short-circuit stub. The short-circuit stub, the dielectric substrate and the equivalent ground plate form an effective grounding path through punching. Finally, the pass-through filter transmits the rectified energy to the load.

[0013] Furthermore, the dielectric substrate is composed of:

[0014] The dielectric substrate is made of 0.2mm polycondensation type polyimide.

[0015] Furthermore, the rectifier circuit is composed of:

[0016] The first branch uses HSMS2860 rectifier tube;

[0017] The second branch is equipped with HSMS2820 rectifier tube;

[0018] A λ / 8 short-circuited branch is connected in series with the diode to compensate for the imaginary part of the diode. The pass-through filter is based on a λ / 4 parallel cross-branch architecture, mainly consisting of a λ / 4 main transmission line and two open-circuited branches, namely a λ / 4 open-circuited branch and a λ / 8 open-circuited branch. Among them, the λ / 4 open-circuited branch is equivalent to a short circuit at the fundamental frequency and the third harmonic frequency, while the λ / 8 open-circuited branch is equivalent to a short circuit at the second harmonic frequency. Under the short-circuit condition, the input impedance of the series λ / 4 microstrip line tends to infinity at the fundamental frequency and the third harmonic, and drops to zero at the second harmonic. This impedance characteristic enables the filter to produce significant reflections at the fundamental frequency, second harmonic, and third harmonic.

[0019] Furthermore, the equivalent ground plate is composed of:

[0020] The equivalent ground plate is actually a very thin layer of gallium-indium alloy, which plays the role of equivalent grounding. It is located on the lower side of the dielectric substrate and its thickness is much smaller than that of the dielectric substrate and is approximately equal to the thickness of the flexible rectifier circuit.

[0021] Furthermore, the Schottky diode is composed of:

[0022] Schottky diodes HSMS-2860 and HSMS-2820;

[0023] HSMS-2860 is more suitable for low-power flexible rectifier circuits due to its lower turn-on voltage and low loss advantages; while HSMS-2820 is more suitable for high-power flexible rectifier circuits due to its higher power handling capability and excellent breakdown characteristics.

[0024] Furthermore, the adaptive power distribution network is composed of:

[0025] The APDN consists of a T-type microstrip transmission line of the low-power unit branch 1 and three multi-level step impedance microstrip transmission lines of the high-power unit branch 2.

[0026] Furthermore, the capacitor for blocking DC and passing AC is composed of:

[0027] Use 10pF surface mount (SMD) capacitors.

[0028] In combination with the above technical solutions and the technical problems solved, please analyze the advantages and positive effects of the technical solutions to be protected by the present invention from the following aspects:

[0029] First, the present invention combines liquid metal printing technology with flexible materials to develop a flexible liquid metal rectifier circuit suitable for 5.8GHz microwave energy transmission. This circuit fully utilizes the advantages of liquid gallium-indium alloy composite materials and flexible dielectric substrates, including excellent flexibility, repairability, reconfigurability, fatigue resistance and corrosion resistance, so that it can maintain stable performance in dynamic environments. Compared with traditional rigid rectifier circuits, this design can not only achieve efficient electromagnetic wave reception and rectification conversion, but also has good adaptability and can work normally under complex curved surface structures and deformation conditions, providing a more flexible and reliable solution for long-distance wireless energy transmission. In addition, this flexible rectifier circuit is suitable for integrated small electronic devices and is expected to play an important role in wireless power supply, smart wearables, medical implants and next-generation wireless sensor networks.

[0030] (1) The problem of impedance matching performance degradation of traditional rectifier circuits at different input power levels is solved. A flexible rectifier circuit with a dual-path sub-rectifier circuit cooperative structure using an adaptive power distribution network (APDN) is developed. By switching back and forth between sub-rectifier circuit units operating in different power ranges, efficient conversion is achieved over a wide input range, thereby improving wireless energy transmission performance.

[0031] (2) The shortcomings of traditional rectifier circuits, such as poor conformality, difficulty in resisting mechanical deformation, and insufficient environmental adaptability, are overcome. The present invention combines flexible materials with liquid metals to enable the rectifier circuit to adapt to different environmental conditions while maintaining stable performance, achieving deformation such as bending and twisting, thereby improving its adaptability and reliability.

[0032] (3) The present invention aims to design a high-efficiency flexible rectifier circuit that operates at 5.8 GHz and is suitable for microwave energy transmission, and has good wide input power adaptability and self-adaptability.

[0033] The rectifier circuit adopts the dual-path sub-rectifier circuit collaborative structure of the adaptive power distribution network (APDN). By switching the sub-rectifier units back and forth between different power intervals, it achieves efficient conversion within a wide input range, thereby significantly improving the wireless energy transmission performance.

[0034] The rectifier circuit dielectric substrate is made of flexible material and has good mechanical properties. It can achieve good conformity with the front-end flexible antenna or load, and can be stretched, bent, twisted, and deformed while maintaining its stable performance.

[0035] The rectifier circuit is made by liquid metal printing, can withstand a large degree of deformation, and has good conformality and certain adaptability.

[0036] The rectifier circuit is applied in the field of wireless energy transmission, has a wide input power range and high efficiency, and can be applied in the field of flexible electronic devices.

[0037] Second, this flexible rectifier circuit solution, with its excellent wide input power adaptability, adaptive power allocation function, and good flexibility, can significantly improve the energy conversion efficiency and environmental adaptability of receiving devices in wireless energy transmission systems. It is suitable for emerging application scenarios such as flexible wearable devices, flexible IoT nodes, self-powered sensor networks, and wireless charging systems. Its promotion and application will effectively address the urgent need for high-performance flexible rectifier circuits in current wireless energy supply systems and has broad market application prospects. It is expected to promote technological upgrades in related fields such as the flexible electronics industry chain, microwave wireless energy transmission equipment, low-power IoT terminals, and smart wearable devices, bringing significant economic benefits and social value, and providing strong support for the development of my country's next-generation information technology, energy electronics, and flexible electronics manufacturing industries.

[0038] The technical solution of the present invention overcomes the technical prejudice in the prior art that flexible rectifier circuits are difficult to achieve efficient and stable energy conversion within a wide input power range. Traditional concepts generally believe that flexible substrates are limited by the material's electrical conductivity and mechanical deformation, which can easily lead to matching failures, making it difficult to maintain good rectification efficiency within a large dynamic power range. The present invention breaks through this cognitive limitation by introducing an adaptive power distribution network (APDN) and a multi-sub-path collaborative rectification architecture, achieving efficient and stable energy conversion performance of flexible rectifier circuits within a wide input power range, with excellent deformation adaptability and wide input power response capabilities, effectively overcoming long-standing design obstacles and engineering difficulties. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] Figure 1 This is a topological diagram of the flexible rectifier circuit structure provided by an embodiment of the present invention.

[0040] Figure 2 It is a side view of a dielectric substrate provided by an embodiment of the present invention.

[0041] Figure 3 This is a microstrip line layout diagram of a wide input power flexible rectifier circuit provided by an embodiment of the present invention.

[0042] Figure 4 It is a structural diagram of a straight-through filter provided by an embodiment of the present invention.

[0043] Figure 5 This is an equivalent circuit diagram of a Schottky diode provided by an embodiment of the present invention.

[0044] Figure 6 1 is a parameter diagram of a wide input power flexible rectifier circuit S11 provided in an embodiment of the present invention.

[0045] Figure 7 4 is a simulation result diagram of the relationship between efficiency and input power provided by an embodiment of the present invention.

[0046] Figure 8 This is an S11 curve diagram after matching of the wide input flexible rectifier circuit provided by an embodiment of the present invention.

[0047] Figure 9 1. (a) Schematic diagram of a bending test of a flexible rectifier circuit provided by an embodiment of the present invention; (b) a graph showing the relationship between efficiency and power. DETAILED DESCRIPTION

[0048] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0049] like Figure 1 As shown, an embodiment of the present invention provides a wide input power flexible rectifier circuit with an adaptive power distribution network, including:

[0050] Dielectric substrate; rectifier circuit; capacitor for blocking DC and passing AC; Schottky diode; adaptive power distribution network; equivalent ground plate.

[0051] 1) Positional relationship and combination of the six parts:

[0052] The dielectric substrate is used as the main supporting structure, and the rectifier circuit is closely attached to the upper surface of the substrate to ensure stable electrical contact and good mechanical support. At the same time, an equivalent ground plate is set at the bottom of the substrate to achieve a reliable grounding effect. The feed interface is connected from the side, and the high input power and low input power rectifier branches are connected in parallel through a microstrip line. Then, the impedance matching is achieved through the adaptive power distribution network (APDN) and connected to the direct-through AC capacitor. The large capacitor is connected to the diode and the direct-through filter. The lower end of the diode is then connected to the short-circuit stub. The short-circuit stub forms an effective grounding path with the dielectric substrate and the equivalent ground plate through perforations. Finally, the direct-through filter transmits the rectified energy to the load, achieving stable and efficient energy transmission (see for details). Figure 1 ).

[0053] 2) Composition of dielectric substrate:

[0054] The dielectric substrate is made of 0.2mm polycondensation type polyimide (attached below) Figure 2 ), is a flexible material with good mechanical properties, resistant to bending and easy to conform.

[0055] 3) Composition of rectifier circuit:

[0056] The first branch uses the HSMS2860 rectifier tube, which has a low turn-on voltage and low internal resistance and can be used for high-efficiency rectification in the low input power range. The second branch is equipped with the HSMS2820 rectifier tube, which has a higher turn-on voltage and lower internal resistance, thereby improving the conversion efficiency. At the same time, it has a higher breakdown voltage, making it suitable for a high input power range. In order to avoid mutual interference between the two rectifier branches under different input power conditions, the parallel characteristics of APDN are used for optimization. The diode is connected in series with a λ / 8 short-circuit branch to compensate for the imaginary part of the diode. The pass-through filter is based on a λ / 4 parallel cross-branch type architecture, which mainly consists of a λ / 4 main transmission line and two open branches, namely a λ / 4 open branch and a λ / 8 open branch. Among them, the λ / 4 open branch is equivalent to a short circuit at the fundamental frequency and the third harmonic frequency, while the λ / 8 open branch is equivalent to a short circuit at the second harmonic frequency (see the following figure). Figure 4 ). Furthermore, under short-circuit conditions, the input impedance of the series-connected λ / 4 microstrip line approaches infinity at the fundamental frequency and third harmonic, while decreasing to zero at the second harmonic. This impedance characteristic enables the filter to generate significant reflections at the fundamental frequency, second harmonic, and third harmonic, effectively suppressing these frequency components and achieving precise filtering of specific harmonics.

[0057] 4) Equivalent ground plane composition:

[0058] The equivalent ground plate is actually a very thin layer of gallium-indium alloy, which plays the role of equivalent grounding. It is located on the lower side of the dielectric substrate and its thickness is much smaller than that of the dielectric substrate and is approximately equal to the thickness of the flexible rectifier circuit.

[0059] 5) Composition of Schottky diode:

[0060] Due to their fast response and low parasitic capacitance, the Schottky diodes HSMS-2860 and HSMS-2820 maintain stable and efficient performance in high-frequency applications. The HSMS-2860, with its lower turn-on voltage and low losses, is more suitable for low-power flexible rectifier circuits; while the HSMS-2820, with its higher power handling capability and excellent breakdown characteristics, is more suitable for high-power flexible rectifier circuits. This device selection strategy tailored to different power requirements ensures excellent circuit performance in the RF and microwave bands, making it an ideal choice for high-frequency circuit design. (See Appendix.) Figure 5 )

[0061] 6) Composition of adaptive power distribution network:

[0062] The APDN consists of a T-shaped microstrip transmission line for the low-power unit branch 1 and three multi-level step-impedance microstrip transmission lines for the high-power unit branch 2. This structure not only achieves effective impedance matching and ensures seamless connection of signal energy between different branches, but also has the functions of bandpass filtering and power distribution. This allows the input RF energy to be accurately distributed to each branch while maintaining low-loss transmission, maximizing overall performance.

[0063] 7) The composition of the capacitor that blocks DC and passes AC:

[0064] A 10pF surface mount (SMD) capacitor is used, which is commonly used in modern high-density circuit design and has low parasitic effects and good high-frequency performance.

[0065] The multi-section microstrip transmission line matches and distributes the input RF signal at different power levels and introduces it into the high-power unit branch 2 and the low-power unit branch 1 respectively.

[0066] Figure 2 Shows the side view of the flexible rectifier circuit.

[0067] Figure 3 The microstrip line layout of the wide input power flexible rectifier circuit can specifically demonstrate the specific size parameters of the wide input power flexible rectifier circuit.

[0068] Figure 4 The main function of a pass filter is to allow signals in a specific frequency band to pass through while attenuating signals in other frequency bands.

[0069] Figure 5 Schematic diagram of the Schottky diode structure. The HSMS-2860 has a conduction voltage of approximately 150mV and a breakdown voltage of 6V, suitable for low-power applications, while the HSMS-2820 has a conduction voltage of approximately 350mV and a higher breakdown voltage of 12V, suitable for high-power applications.

[0070] Because the rectifier circuit is made of liquid gallium-indium alloy and the circuit dielectric substrate is made of polyimide film, it is flexible and conformable, offering significant advantages over traditional rectifier circuits made of rigid materials. The high flexibility of liquid metal and polyimide ensures that the rectifier circuit maintains stable performance under large deformations, while also adapting well to environmental changes and demonstrating excellent adaptability.

[0071] The specific application fields or related products of the present invention.

[0072] Flexible wearable devices: wireless charging receiving modules in smart bracelets, medical patches, and health monitoring terminals.

[0073] IoT self-powered terminal: flexible wireless charging sensor node, low-power IoT device.

[0074] Portable wireless energy harvesting equipment: wireless charging systems for drones, portable equipment, and flexible display terminals.

[0075] Wireless charging transportation equipment: wireless charging cars, smart traffic signs, and vehicle-mounted flexible receiving-end rectifier modules.

[0076] Special application equipment: flexible tailless notebook, emergency rescue wireless energy supply equipment, flexible communication terminal.

[0077] Multi-frequency and multi-power dynamically adaptive wireless energy transmission system: multi-scenario conformal energy supply system, environmental multi-bandwidth power microwave energy harvesting module.

[0078] Figure 6 The post-matching S11 characteristics of a wide-input-power flexible rectifier circuit were demonstrated. Experimental data showed that the reflection coefficient remained below -10dB when the input power varied within a dynamic range of -7dBm to 33.5dBm. This result demonstrates that the rectifier circuit can maintain effective matching with the source impedance over a power fluctuation range of up to 40.5dB, thereby ensuring efficient conversion of microwave energy to DC energy. This wide-range impedance adaptation effectively solves the mismatching problem caused by input power variations in traditional rectifier circuits.

[0079] Thanks to the optimized design of the matching network, the rectifier circuit achieves good impedance matching performance in the input power range of -7dBm to 33.5dBm, thereby ensuring efficient energy conversion in a wide dynamic range. In order to verify the advantages of this work, a simulation comparison of the rectifier circuit using a single diode is also carried out, such as Figure 7 As shown in Figure 2, the proposed rectifier can achieve a conversion efficiency exceeding 50% within an input power range of 3 to 27 dBm, reaching a peak of 69.1% at 14 dBm. It is noteworthy that the effective operating range of the rectifier at high conversion efficiency has been significantly extended compared to traditional structures, demonstrating excellent wide power adaptability.

[0080] Under the condition of input power of 17dBm, using the matched output port load impedance, the S 11 Return loss simulation. Figure 8 The simulation and measured data shown in the figure show that at 5.8GHz, the S 11 The simulation result is -27.4dB, while the measured value is -28.6dB, both showing excellent matching performance. The trends of the two sets of data are highly consistent, further verifying the effectiveness of the designed matching structure.

[0081] As a flexible rectifier circuit with a wide input power range, simulations have verified its good dynamic power range characteristics in a planar state, but impedance stability under mechanical deformation is required. Using foam cylinders with curvature radii of 80mm, 70mm, and 60mm as conformal carriers, experiments were conducted to test the effects of different bending states on the rectifier circuit's energy conversion efficiency. Figure 9 The bending deformation diagram of the rectifier circuit and the change of the efficiency curve under the corresponding bending radius are presented.

[0082] from Figure 9 As can be seen from the diagram, the RF-DC conversion efficiency of this wide-input-power flexible rectifier circuit shows roughly the same trend as input power in both the flat and curved states, maintaining relatively stable efficiency over a wide power range. In the flat state, circuit test results show that at 5.8 GHz, when the input power ranges from 3 dBm to 27 dBm, the energy conversion efficiency exceeds 50%, with a peak efficiency of 66.2%. The slight decrease in efficiency compared to the schematic simulation results is primarily attributed to manufacturing process variations and discrepancies between the Schottky diode simulation model and the actual device parameters. Under bending conditions, for R = 80mm, the effective input power range where rectification efficiency exceeds 50% shrinks to 4-26dBm, and the peak efficiency drops to 65.2%. When R is 70mm, this range shrinks to 5-24dBm, and the peak efficiency drops to 63.6%. At R = 60mm, the effective input power range shrinks further to 7-23dBm, with the peak efficiency dropping to 60.5%, and the input power shifts 2dBm to the right. This efficiency drop and peak efficiency shift are primarily due to circuit deformation caused by bending, which results in non-uniform strain distribution between the microstrip conductor layer and the dielectric substrate, thus changing the corresponding inductance and capacitance values and ultimately affecting the circuit's input impedance. Despite this, the data shows that when the bending radius is reduced to 60mm, the flexible circuit still achieves RF-to-DC conversion efficiency exceeding 50% within an input power range of 7-23dBm, verifying the reliability of the flexible rectification circuit in conformal applications.

[0083] The above description is only a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any modifications, equivalent substitutions and improvements made by any technician familiar with this technical field within the technical scope disclosed by the present invention and within the spirit and principles of the present invention should be covered by the scope of protection of the present invention.

Claims

1. A wide input power flexible rectifier circuit with an adaptive power distribution network, characterized in that: include: dielectric substrate; Rectifier circuit; Capacitors that block DC and pass AC; Schottky diodes; Adaptive power distribution network; Equivalent ground plane; The dielectric substrate is used as the main supporting structure, and the rectifier circuit is closely attached to the upper surface of the substrate; An equivalent ground plate is provided at the lower part of the substrate; The feed interface is connected from the side, and the high input power and low input power rectifier branches are connected in parallel through a microstrip line. Then, the impedance matching is achieved through the adaptive power distribution network, and the power is connected to the DC-blocking AC capacitor. The large capacitor is connected to the diode and the pass-through filter. The lower end of the diode is connected to the short-circuit stub. The short-circuit stub, the dielectric substrate and the equivalent ground plate form an effective grounding path through punching. Finally, the pass-through filter transmits the rectified energy to the load.

2. The wide input power flexible rectifier circuit with an adaptive power distribution network according to claim 1, wherein: The dielectric substrate is composed of: The dielectric substrate is made of 0.2mm polycondensation type polyimide.

3. The wide input power flexible rectifier circuit with an adaptive power distribution network according to claim 1, wherein: The composition of the rectifier circuit: The first branch uses HSMS2860 rectifier tube; The second branch is equipped with HSMS2820 rectifier tube; A λ / 8 short-circuited branch is connected in series with the diode to compensate for the imaginary part of the diode. The pass-through filter is based on a λ / 4 parallel cross-branch architecture, mainly consisting of a λ / 4 main transmission line and two open-circuited branches, namely a λ / 4 open-circuited branch and a λ / 8 open-circuited branch. Among them, the λ / 4 open-circuited branch is equivalent to a short circuit at the fundamental frequency and the third harmonic frequency, while the λ / 8 open-circuited branch is equivalent to a short circuit at the second harmonic frequency. Under the short-circuit condition, the input impedance of the series λ / 4 microstrip line tends to infinity at the fundamental frequency and the third harmonic, and drops to zero at the second harmonic. This impedance characteristic enables the filter to produce significant reflections at the fundamental frequency, second harmonic, and third harmonic.

4. The wide input power flexible rectifier circuit with an adaptive power distribution network according to claim 1, wherein: The equivalent ground plate is composed of: The equivalent ground plate is actually a very thin layer of gallium-indium alloy, which plays the role of equivalent grounding. It is located on the lower side of the dielectric substrate and its thickness is much smaller than that of the dielectric substrate and is approximately equal to the thickness of the flexible rectifier circuit.

5. The wide input power flexible rectifier circuit with an adaptive power distribution network according to claim 1, wherein: The composition of the Schottky diode: Schottky diodes HSMS-2860 and HSMS-2820; HSMS-2860 is more suitable for low-power flexible rectifier circuits due to its lower turn-on voltage and low loss advantages; while HSMS-2820 is more suitable for high-power flexible rectifier circuits due to its higher power handling capability and excellent breakdown characteristics.

6. The wide input power flexible rectifier circuit with an adaptive power distribution network according to claim 1, wherein: The adaptive power distribution network is composed of: The APDN consists of a T-type microstrip transmission line of the low-power unit branch 1 and three multi-level step impedance microstrip transmission lines of the high-power unit branch 2.

7. The wide input power flexible rectifier circuit with an adaptive power distribution network according to claim 1, wherein: The composition of the capacitor that blocks DC and passes AC: Use 10pF surface mount (SMD) capacitors.

Images