A frequency mixing and rectification device, method and application thereof

Abstract

The present invention belongs to the field of wireless signal and energy simultaneous transmission technology and discloses a frequency mixer and rectifier device, method, and application thereof, comprising: a power distribution / combination module for outputting a high-power input radio frequency signal and a low-power local oscillator signal from one channel; a matching network for matching input impedances to ensure that as much energy as possible is transferred to subsequent circuits; a frequency mixer and rectifier module for generating the required DC and intermediate frequency components, as well as the unwanted fundamental wave, higher harmonics, and intermodulation components of various orders; a harmonic suppression network for filtering out noise from the output of the frequency mixer and rectifier module and re-rectifying and re-mixing the fundamental wave and higher harmonics; an intermediate frequency filter for filtering out unwanted frequency components and extracting the intermediate frequency component; and a narrowband low-pass filter for extracting the DC component. Compared with conventional technical solutions, the frequency mixer and rectifier device disclosed in the present invention processes energy and information, and implements the functions of a rectifier circuit and a mixer in a single device, achieving high integration. The integration of the two devices reduces the use of diodes and the volume of the circuit board, effectively reducing the complexity and cost of the system circuit, making the system easy to implement, compact, and low-cost.

Description

Technical Field

[0001] The present invention belongs to the technical field of wireless signal and energy simultaneous transmission, and in particular relates to a frequency mixing and rectification device, method and application thereof. Background Art

[0002] Currently, wireless simultaneous signal transmission technology uses electromagnetic waves to simultaneously transmit electrical energy and information from a transmitter to a receiver, which then processes the energy and information. This technology not only addresses the safety risks associated with traditional wire-powered power supply technology, such as the need to drag cables, frequent movement between power supply and user devices, frequent plugging and unplugging of power sockets, and aging lines, but also allows for the simultaneous transmission of effective control information. Therefore, this technology can be applied in a variety of situations. For example, some implanted devices, while functioning normally within the body, also need to transmit information about certain organs within the human body to the outside world. Doctors can use this information to understand the patient's physical condition and adjust medication for them. In smart homes, it can not only deliver energy to various electrical devices, but also promptly transmit indoor information (such as temperature and humidity) to the control system, making the home environment more comfortable and safer.

[0003] Among them, in the receiver of simultaneous transmission, the extraction of energy and information is crucial. The extraction of energy is mainly achieved through the rectifier circuit, and the extraction of information is generally achieved by down-converting the high-frequency signal to the low-frequency band through the mixer, and then performing subsequent signal demodulation, such as Figure 1 Therefore, the design of the rectifier circuit and mixer is very necessary.

[0004] In the current wireless signal-to-energy transmission system, after the receiver receives the radio frequency energy signal carrying information, it first divides the signal into two paths through a power splitter or coupler and inputs them into the rectifier circuit and mixer respectively. The design of the rectifier circuit and the mixer are both designed separately, the system integration is not high, and the structure is complex. Figure 1 shown. Summary of the Invention

[0005] In order to solve the problems existing in the prior art, the present invention proposes a frequency mixing and rectification device, method and application thereof. On the one hand, the present invention realizes the two functions of rectification and frequency mixing with one device, which greatly improves the system integration. On the other hand, Figure 2 As shown, Figure 1 In comparison, this integration approach reduces the system size, reduces system complexity and cost, and has broad application prospects in simultaneous interpretation systems.

[0006] Conventional rectifier and mixer circuit designs utilize the nonlinear effects of nonlinear elements (diodes, transistors, etc.) to achieve rectification and frequency conversion, respectively. Therefore, the design concept of the present invention is to use nonlinear elements to design a four-port circuit that can simultaneously achieve rectification and mixing functions. The RF signal and the local oscillator signal are input into two input ports, respectively, and the DC energy and the intermediate frequency signal are output from two output ports.

[0007] The present invention is implemented as follows: a frequency mixing and rectifying device, the frequency mixing and rectifying device comprising:

[0008] The power distribution / combination module is used to output high-power RF input signals and low-power LO signals through one channel. It mainly has three ports: high-power RF input port ①, low-power LO input port ②, and RF LO output port ③.

[0009] Matching network, used to match the input impedance so that as much energy as possible is transferred to the subsequent circuit;

[0010] The mixer and rectifier module is used to generate the required DC and intermediate frequency components and the unnecessary fundamental wave, higher harmonics and intermodulation components of each order;

[0011] Harmonic suppression network, used to filter out the output noise of the mixer and rectifier module and to re-rectify and re-mix the fundamental wave and higher harmonics;

[0012] Intermediate frequency filter, used to filter out useless frequency components and extract intermediate frequency components;

[0013] The narrowband low-pass filter is used to smooth the DC output waveform, forming a low-pass filter with a low cut-off frequency, and only extracting the DC component.

[0014] Furthermore, the power distribution / combination module may be composed of a coupler, a power splitter, a combiner or a duplexer.

[0015] Furthermore, the matching network may be formed by a circuit consisting of a DC blocking capacitor in series with a microstrip line or an LC matching circuit.

[0016] Furthermore, the frequency mixing and rectifying module can be composed of diodes or transistors.

[0017] Furthermore, the harmonic suppression network may be composed of a structure consisting of high-frequency lumped elements, a microstrip line structure, or a structure consisting of a microstrip line cascaded with high-frequency lumped elements.

[0018] Furthermore, the intermediate frequency filter may be formed by a microstrip line structure, an LC filter circuit, or a structure of microstrip line cascaded LC elements.

[0019] Furthermore, the narrowband low-pass filter may be formed by a microstrip line structure, an LC filter circuit, or a structure of a microstrip line cascaded LC element.

[0020] Furthermore, the high-power RF input signal and the low-power local oscillator input signal are respectively connected to port ① and port ② of the power distribution / synthesis module; one end of the matching network is connected to port ③ of the power distribution / synthesis module, and the other end is connected to the frequency mixing and rectification module; one end of the frequency mixing and rectification module is connected to the matching network, and the other end is connected to one end of the harmonic suppression network; one end of the harmonic suppression network is connected to the frequency mixing and rectification module, and the other end is divided into two paths and connected to the intermediate frequency filter and the narrowband low-pass filter respectively; one end of the intermediate frequency filter is connected to the harmonic suppression network, and the other end is connected to the intermediate frequency output end; one end of the narrowband low-pass filter is connected to the harmonic suppression network, and the other end is connected to the load.

[0021] Another object of the present invention is to provide a frequency mixing and rectifying method for implementing the frequency mixing and rectifying device, the frequency mixing and rectifying method comprising:

[0022] The mixing and rectifying device receives a high-power radio frequency energy signal S carrying information. RF , enters from the high-power RF signal input terminal, the frequency is f RF ;

[0023] The crystal oscillator generates a frequency of f LO The local oscillator signal S LO , enter from the local oscillator signal input terminal;

[0024] Signal S RF and S LO Input the input end ① and isolation end ② of the coupler respectively, and output from the through end ③ all the way to the matching network;

[0025] Signal S RF and S LO Transmitted to the Schottky diode through the matching network;

[0026] After passing through the Schottky diode, a DC component DC and nf RF ±mf LO Frequency components, where n,m ≥ 0 and are integers;

[0027] After passing through the harmonic suppression network, the output frequency is f IF =f RF -f LO The signal S IF and a DC component DC;

[0028] Signal S IF After the DC component passes through the intermediate frequency filter, the output frequency is f IF=f RF -f LO The signal is sent to the intermediate frequency signal output terminal;

[0029] Signal S IF After the DC component DC passes through the narrowband low-pass filter, the DC component is output to the load.

[0030] Another object of the present invention is to provide an application of the mixing and rectifying device in a wireless signal transmission system.

[0031] Compared with the existing technical solutions, the technical solution to be protected by the present invention has the following advantages and positive effects:

[0032] First, the present invention builds on the rectifier circuit structure by adding a coupler at the front stage and an intermediate frequency filter and narrowband low-pass filter at the back stage, creating a four-port device. RF and local oscillator signals are input through two input ports, while DC energy and intermediate frequency signals are output through two output ports. This innovative integration of the functions of the rectifier circuit and mixer into a single device significantly improves circuit integration.

[0033] Second, the mixer-rectifier device designed by the present invention integrates the rectifier circuit and mixer functions into one device and is applied to the signal-to-energy simultaneous interpretation system. Figure 1 , Figure 2 The complexity of the system is greatly simplified, and compared with the separately designed rectifier circuit and mixer circuit, the present invention uses fewer diodes, reducing the complexity and cost of the system circuit, so that the system has the advantages of easy implementation, small size and low cost.

[0034] Third, as auxiliary evidence for the inventiveness of the claims of the present invention, it is also reflected in the following important aspects:

[0035] (1) The present invention proposes for the first time to integrate the rectifier circuit and the mixer circuit into one, realizing the extraction of information and energy with one device, which is of great significance for the integration of information and energy.

[0036] (2) The present invention can be applied to a simultaneous interpretation system to significantly reduce the system's size, complexity, and cost. For implantable medical devices, reducing the size can reduce the risk and difficulty of implant surgery and alleviate human discomfort. For systems with many electrical devices, such as smart homes and wireless sensor network nodes, the use of this invention can significantly reduce the system's cost and size. This shows that the present invention has great application value in simultaneous interpretation systems. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] Figure 1 This is the block diagram of the traditional simultaneous interpretation system

[0038] Figure 2 This is a block diagram of the signal-to-sense simultaneous interpretation system using the present invention.

[0039] Figure 3 This is a circuit block diagram of the frequency mixing and rectifying device of the present invention;

[0040] Figure 4 is a circuit diagram of an application embodiment of the present invention;

[0041] Figure 5 This is a diagram showing the power efficiency simulation results of a circuit according to an embodiment of the present invention;

[0042] Figure 6 This is a diagram showing the simulation results of the frequency conversion loss of an application embodiment of the present invention. DETAILED DESCRIPTION

[0043] 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.

[0044] 1. Explanatory Examples In order to enable those skilled in the art to fully understand how to implement the present invention, this section provides an illustrative example that expands upon the technical solutions of the claims.

[0045] like Figure 3 As shown, the structure of the overall circuit of the present invention and its working principle are further described in detail. The circuit of the present invention includes: a power distribution / synthesis module, a matching network, a mixing and rectification module, a harmonic suppression network, an intermediate frequency filter, and a narrowband low-pass filter. Among them:

[0046] The main purpose of the power distribution / combination module is to output the input high-power RF signal and the low-power local oscillator signal through one channel. Any of a coupler, power splitter, combiner, or duplexer can be used. In the embodiment of the present invention, the power distribution / combination module can be implemented by a coupler, which is mainly provided with three ports: a high-power RF input port ①, a low-power local oscillator input port ②, and a RF local oscillator output port ③. The RF local oscillator output port ③ is connected to a matching network.

[0047] The main purpose of the matching network is to achieve input impedance matching so that as much energy as possible is transferred to the subsequent circuit. This can be achieved by using a circuit composed of a DC blocking capacitor in series with a microstrip line or an LC matching circuit. In an embodiment of the present invention, the matching network can be implemented by a circuit composed of a DC blocking capacitor in series with a microstrip line, with one end of the matching network connected to the RF local oscillator output port and the other end connected to the mixer rectifier module;

[0048] The main purpose of the mixer-rectifier module is to generate the required DC and intermediate frequency components as well as the unwanted fundamental wave, higher harmonics, and intermodulation components of various orders. This is typically achieved using components with nonlinear effects, such as diodes and transistors. This can be achieved by connecting one or more nonlinear components in series or in parallel, or by combining nonlinear components with microstrip lines. In an embodiment of the present invention, the mixer-rectifier module is implemented by connecting a series diode and a parallel diode using a microstrip line. One end of the mixer-rectifier module is connected to a matching network, and the other end is connected to a harmonic suppression network.

[0049] The main purpose of the harmonic suppression network is to filter out the output clutter of the mixer and rectifier module and to re-rectify and re-mix the fundamental wave and higher harmonics. This network can be implemented using a structure composed of high-frequency lumped elements, a microstrip line structure, or a structure composed of a microstrip line and a cascade of high-frequency lumped elements. In the embodiment of the present invention, the harmonic suppression network is implemented using a microstrip line structure. One end of the harmonic suppression network is connected to the mixer and rectifier module, and the other end is connected to an intermediate frequency filter and a narrowband low-pass filter in two ways.

[0050] The main purpose of the intermediate frequency filter is to extract the required intermediate frequency component, which can be implemented using a microstrip line structure, an LC filter circuit, or a microstrip line cascaded LC element structure. In the embodiment of the present invention, the intermediate frequency filter is implemented by an LC filter circuit, one end of the intermediate frequency filter is connected to the harmonic suppression network, and the other end is connected to the intermediate frequency output terminal;

[0051] The narrowband low-pass filter's primary purpose is to smooth the DC output waveform, forming a low-pass filter with a low cutoff frequency that extracts only the DC component. This filter can be implemented using a microstrip structure, an LC filter circuit, or a microstrip line cascaded with LC elements. In this embodiment of the present invention, the narrowband low-pass filter is implemented using an LC filter circuit. One end of the narrowband low-pass filter is connected to a harmonic suppression network, and the other end is connected to a load.

[0052] The embodiments and effects of the present invention are further described in detail below in conjunction with the working principle of the present invention.

[0053] After the input high-power RF signal and low-power local oscillator signal pass through the power distribution / synthesis module, they enter the mixing and rectification module from one output through the matching network to obtain the required DC and intermediate frequency components and the unnecessary fundamental wave, higher harmonics and various-order intermodulation components. After filtering by the harmonic suppression network, the main outputs are intermediate frequency components and DC components. One end of the intermediate frequency component and DC component is filtered by the intermediate frequency filter to output the intermediate frequency component, and the other end is filtered by the narrowband low-pass filter to output the DC component to the load, completing the rectification and mixing functions.

[0054] 2. Application Examples: In order to demonstrate the creativity and technical value of the technical solution of the present invention, this section provides application examples of the claimed technical solution on specific products or related technologies.

[0055] Reference Figure 4 , further describes the circuit structure and working principle of the application embodiment of the present invention.

[0056] Application embodiment of the present invention: The power distribution / synthesis module is implemented by a coupler, which is composed of a coupled microstrip line Clin1; the matching network is implemented by a circuit composed of a DC blocking capacitor in series with a microstrip line, which is composed of a DC blocking capacitor C1, microstrip lines TL2, TL3, TL4, TL5, a T-shaped microstrip line Tee1, open microstrip lines TL6, TL7 and a cross-shaped microstrip line Cros1; the rectification and mixing module is implemented by a series diode cascaded to a microstrip line and a parallel diode cascaded to a microstrip line, which is composed of Schottky diodes D1, D2 and microstrip line TL8 and TL9; the harmonic suppression network is implemented by a microstrip line structure, consisting of microstrip lines TL10, TL11, TL12, TL13, T-shaped microstrip lines Tee2, Tee3, Tee4, cross-shaped microstrip line Cros2 and microstrip fan-shaped branches Stub1, Stub2, Stub3, and Stub4; the intermediate frequency filter is implemented by an LC filtering circuit, consisting of capacitors C2, C4, C5 and inductors L2, L3, and L4; the narrowband low-pass filter is implemented by an LC filtering circuit, consisting of capacitor C3 and inductor L1.

[0057] The circuit of the embodiment of the present invention has two input ports PORT1 and PORT2, two output ports TermG1 and TermG2, two Schottky diodes, five capacitors, four inductors, a pair of coupled microstrip lines, four sections of T-shaped microstrip lines, two sections of cross-shaped microstrip lines, two sections of open microstrip lines, four sections of fan-shaped microstrip branches, and eleven sections of microstrip lines. Among them:

[0058] The coupled microstrip line Clin1 forms a coupler, the coupler input end is connected to the high-power RF signal input port PORT1, the coupler isolation end is connected to the low-power local oscillator signal input port PORT2, the coupler coupling end is directly grounded via the microstrip line TL1, and the coupler through end is connected to the DC blocking capacitor C1;

[0059] One end of the DC blocking capacitor C1 is connected to the through end of the coupled microstrip line, and the other end is connected to the first port of the T-shaped microstrip line Tee1 via the microstrip lines TL2, TL3 and TL4. The second port of the T-shaped microstrip line Tee1 is connected to the first port of the cross-shaped microstrip line Cros1 via the microstrip line TL5. The second port and the fourth port of the cross-shaped microstrip line Cros1 are connected to the open microstrip lines TL6 and TL7 respectively, forming a matching network.

[0060] The cathode of the Schottky diode D1 is connected to the third port of the cross-shaped microstrip line Cros1 via the microstrip line TL8, the anode of the Schottky diode D1 is directly grounded, the anode of the Schottky diode D2 is connected to the third port of the T-shaped microstrip line Tee1 via the microstrip line TL9, and the cathode of the Schottky diode D2 is connected to the first port of the T-shaped microstrip line Tee2 via the microstrip line TL10, forming a mixing and rectifying module;

[0061] The second port of the T-shaped microstrip line Tee2 is connected to the fan-shaped microstrip stub Stub1, the third port of the T-shaped microstrip line Tee2 is connected to the first port of the T-shaped microstrip line Tee3 via the microstrip line TL11, the second port of the T-shaped microstrip line Tee3 is connected to the fan-shaped microstrip stub Stub2, the third port of the T-shaped microstrip line Tee3 is connected to the first port of the cross-shaped microstrip line Cros2 via the microstrip line TL12, the second port and the fourth port of the cross-shaped microstrip line Cros2 are connected to the fan-shaped microstrip stubs Stub3 and Stub4 respectively, and the third port of the cross-shaped microstrip line Cros2 is connected to the first port of the T-shaped microstrip line Tee4 via the microstrip line TL13 to form a harmonic suppression network;

[0062] One end of capacitor C2 is connected to the second port of T-shaped microstrip line Tee4, and the other end is connected to capacitor C4, inductor L3, and capacitor C5 via L2. One end of capacitor C4 and inductor L3 is connected to inductor L2, and the other end is directly grounded. One end of capacitor C5 is connected to inductor L2, and the other end is connected to the output intermediate frequency port TermG1 via inductor L4, forming an intermediate frequency filter.

[0063] One end of the inductor L1 is connected to the third port of the T-shaped microstrip line Tee4 , and the other end is connected to the ground through a capacitor C3 , and then connected to the DC output port TermG2 , forming a narrowband low-pass filter.

[0064] The working principle of the application embodiment of the present invention is as follows:

[0065] In the application embodiment of the present invention, after a high-power radio frequency signal and a low-power local oscillator signal are input into a coupler composed of a coupled microstrip line Clin1 from ports PORT1 and PORT2 respectively, the signals are output from the through-end of the coupler through a matching network composed of a DC blocking capacitor C1, microstrip lines TL2, TL3, TL4, TL5, a T-shaped microstrip line Tee1, open microstrip lines TL6, TL7 and a cross-shaped microstrip line Cros1, and then the signals are input into Schottky diodes D1 and D2 through microstrip lines TL8 and TL9 respectively to complete rectification and mixing, and output DC and intermediate frequency components as well as unnecessary fundamental waves, higher harmonics and intermodulation components of various orders. These frequency components are output through the microstrip line. The harmonic suppression network composed of strip lines TL10, TL11, TL12, TL13, T-shaped microstrip lines Tee2, Tee3, Tee4, cross-shaped microstrip line Cros2 and microstrip fan-shaped branches Stub1, Stub2, Stub3, Stub4 mainly outputs intermediate frequency components and DC components. The intermediate frequency components and DC components are output from the intermediate frequency filter composed of capacitors C2, C4, C5 and inductors L2, L3, L4 to the intermediate frequency output terminal TermG1 on one path, and the DC components are output from the narrowband low-pass filter composed of capacitor C3 and inductor L1 to the DC output port TermG2 on the other path, completing the rectification and mixing functions.

[0066] 3. Evidence of the effects of the embodiments. The embodiments of the present invention have achieved some positive effects during the development or use process, which can be further illustrated by the following simulation:

[0067] 1. Simulation conditions

[0068] The simulated RF signal frequency is 5.8 GHz, the local oscillator signal frequency is 5.68 GHz, the RF signal input power Pin scanning range is 15 dBm to 30 dBm; the local oscillator signal input power Pin1 scanning range is -10 dBm to 5 dBm.

[0069] 2. Simulation content and result analysis

[0070] The circuit structure diagram of the application embodiment is simulated. When the input low-power local oscillator signal power value Pin1 is fixed at 0dBm, the output rectification efficiency eff of the application embodiment of the present invention varies with the input RF signal power Pin as shown below: Figure 5 As shown in the figure. The horizontal axis represents the RF signal input power Pin, in dBm, and the vertical axis represents the rectification efficiency eff, in %. Figure 5It can be seen that when the input RF signal power Pin varies from 15dBm to 22dBm, the rectification efficiency eff increases with the increase of the input RF power Pin; when it varies from 22dBm to 30dBm, the rectification efficiency eff decreases with the increase of the input RF power Pin; when the input RF power Pin ranges from 20dBm to 23dBm, the rectification efficiency eff is greater than 60%; when the input RF power Pin is 22dBm, the rectification efficiency eff is the largest, which is 64.576%.

[0071] When the input high-power RF signal power value Pin is fixed at 22dBm, the output conversion loss dBm (VT[::,1]) of the application embodiment of the present invention varies with the input local oscillator signal power Pin1 as follows: Figure 6 As shown. The horizontal axis represents the local oscillator signal input power Pin1, in dBm, and the vertical axis represents the frequency conversion loss dBm (VT[::,1]), in dB. Figure 6 It can be seen that when the input local oscillator signal power Pin1 varies from -10dBm to 5dBm, the conversion loss dBm (VT[::,1]) increases linearly with the increase of the input local oscillator power Pin1, and the conversion loss is 24.725dB.

[0072] In summary, in the application embodiment of the present invention, when the input RF signal power is 22dBm and the input local oscillator signal power is 0dBm, the output rectification efficiency is 64.576%, the frequency conversion loss is 24.725dB, and the frequency conversion loss changes linearly with the power change of the low-power local oscillator signal, thereby realizing the rectification and mixing functions.

[0073] 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 frequency mixing and rectifying device, characterized in that: The frequency mixing and rectifying device comprises: Power distribution / combination module: This module outputs high-power RF input and low-power LO signals through one channel. It has three ports: RF input port ①, LO input port ②, and RF LO output port ③. RF LO output port ③ is connected to the matching network. Matching network: This matches the input impedance to ensure energy transfer to the subsequent circuit. One end of the matching network is connected to the RF local oscillator output port ③, and the other end is connected to the mixer and rectifier module. Mixer and rectifier module: generates the required DC and intermediate frequency components as well as the unnecessary fundamental wave, higher harmonics and intermodulation components of each order. One end of the mixer and rectifier module is connected to the matching network, and the other end is connected to the harmonic suppression network; Harmonic suppression network: This network filters out the noise from the mixer-rectifier module and re-rectifies and re-mixes the fundamental and higher harmonics. One end of the harmonic suppression network is connected to the mixer-rectifier module, and the other end is connected to the intermediate frequency filter and narrowband low-pass filter in two ways. IF filter: extracts the required IF component. One end of the IF filter is connected to the harmonic suppression network, and the other end is connected to the IF output terminal. Narrowband low-pass filter: Smooths the DC output waveform to form a low-pass filter with a low cut-off frequency, extracting only the DC component. One end of the narrowband low-pass filter is connected to the harmonic suppression network and the other end is connected to the load.

2. The frequency mixing and rectifying device according to claim 1, wherein: The power distribution / synthesis module is composed of a coupler, a power splitter, a combiner or a duplexer.

3. The frequency mixing and rectifying device according to claim 1, wherein: The matching network is composed of a circuit consisting of a DC blocking capacitor in series with a microstrip line or an LC matching circuit.

4. The frequency mixing and rectifying device according to claim 1, wherein: The frequency mixing and rectifying module is composed of diodes or triodes.

5. The frequency mixing and rectifying device according to claim 1, wherein: The harmonic suppression network is composed of a structure consisting of high-frequency lumped elements, a microstrip line structure, or a structure consisting of a microstrip line and cascaded high-frequency lumped elements.

6. The frequency mixing and rectifying device according to claim 1, wherein: The intermediate frequency filter is composed of a microstrip line structure, an LC filter circuit or a microstrip line cascaded LC element structure.

7. The frequency mixing and rectifying device according to claim 1, wherein: The narrowband low-pass filter is composed of a microstrip line structure, an LC filter circuit or a microstrip line cascaded LC element structure.

8. The frequency mixing and rectifying device according to claim 1, wherein: After the input high-power RF signal and low-power local oscillator signal pass through the power distribution / synthesis module, they enter the mixing and rectification module from one output through the matching network to obtain the required DC and intermediate frequency components and the unnecessary fundamental wave, higher harmonics and intermodulation components of each order. After filtering by the harmonic suppression network, the intermediate frequency component and DC component are output. One end of the intermediate frequency component and DC component is filtered by the intermediate frequency filter to output the intermediate frequency component, and the other end is filtered by the narrowband low-pass filter to output the DC component, completing the rectification and mixing functions.

9. A frequency mixing and rectifying method for implementing the frequency mixing and rectifying device according to any one of claims 1 to 8, characterized in that: The mixing and rectification method comprises: The mixing and rectifying device receives a high-power radio frequency energy signal S carrying information. RF , enters from the high-power RF signal input terminal, the frequency is f RF ; The crystal oscillator generates a frequency of f LO The local oscillator signal S LO , enter from the local oscillator signal input terminal; Signal S RF and S LO Input the input end ① and isolation end ② of the coupler respectively, and output from the through end ③ all the way to the matching network; Signal S RF and S LO Transmitted to the Schottky diode through the matching network; After passing through the Schottky diode, DC component DC and nf are generated RF ±mf LO Frequency components, where n,m ≥ 0 and are integers; After passing through the harmonic suppression network, the output frequency is f IF =f RF -f LO The signal S IF and a DC component DC; Signal S IF After the DC component passes through the intermediate frequency filter, the output frequency is f IF =f RF -f LO The signal is sent to the intermediate frequency signal output terminal; Signal S IF After the DC component DC passes through the narrowband low-pass filter, the DC component is output to the load.

10. Application of the frequency mixing and rectifying device according to any one of claims 1 to 8 in a wireless signal and energy simultaneous transmission system.

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