Wireless information and energy simultaneous transmission system and method based on pilot frequency direction backtracking

Abstract

The invention belongs to the technical field of wireless energy transmission and wireless communication synchronous transmission, and discloses a wireless information and energy simultaneous transmission system and method based on pilot frequency direction backtracking, and the wireless information and energy simultaneous transmission system based on pilot frequency direction backtracking comprises an electromagnetic energy and information receiving end and an electromagnetic energy and information transmitting end. The pilot frequency receiving and transmitting direction backtracking method disclosed by the invention has the advantages of fast response, adaptive tracking and multipath and multi-frequency interference resistance. The backtracking circuit adopts a pure simulation mode to realize a backtracking function, can perform directional backhaul of energy and information under the condition of not extracting target position information, and is high in system response speed and capable of performing self-adaptive tracking on a target in rapid movement due to the absence of a digital signal processing process of position information extraction. And interference of multipath signals on target positioning can be effectively resisted.

Description

Technical Field

[0001] The present invention belongs to the technical field of wireless energy transmission and wireless communication synchronous transmission, and in particular relates to a wireless signal energy simultaneous transmission system and method based on heterofrequency directional backtracking. Background Art

[0002] With the development of Internet of Things technology, a large number of wireless sensors and Internet of Things networks have been built and applied on a large scale, and the use of sensors and small electronic devices has greatly increased. At the same time, with the complexity of the application environment, the traditional complicated wired power supply is no longer sufficient to meet the use needs. The power supply of a large number of sensors and electronic devices needs to develop towards wireless and intelligent. Electromagnetic energy, as a green, controllable and sustainable energy, provides an optional solution to this problem. At the same time, the demand for information transmission in Internet of Things technology cannot be ignored. Electromagnetic waves are excellent energy and information carriers. The technology of using microwaves to transmit wireless energy and wireless information at the same time has been widely studied and developed.

[0003] In the process of simultaneous transmission of signal and energy, how to accurately locate the target and transmit energy and information with sufficient power is a problem that needs to be solved urgently. In the traditional method of first locating the target through the wireless positioning subsystem and then controlling the beam direction by the phased array for energy transmission, the interference of multipath reflection and high-power energy transmission signals to the wireless positioning subsystem is difficult to handle, and because of the need for digital signal processing, the response speed is limited, and it is difficult to cope with the simultaneous transmission of signal and energy of high-speed moving targets. Direction backtracking, with its unique advantage of realizing adaptive tracking backtracking in a purely analog way, can be well adapted to the working environment of the wireless energy transmission system. Some existing wireless energy transmission systems based on directional backtracking that have been reported, such as the patent applied for by Xidian University, "A wireless energy transmission system and method based on directional backtracking antenna" (patent number: CN201810656679.8), all use the same or similar transmitting and receiving frequencies. Such an architecture is easy to design and reuse the transmitting and receiving antenna arrays, but there are defects such as insufficient transmitting and receiving isolation and insufficient transmitting energy. Most of them are only simple wireless energy transmission, and do not fully utilize the characteristics of the system's own architecture. On the basis of the original wireless energy transmission system, it organically combines wireless information transmission to realize the joint transmission of energy and information.

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

[0005] The existing wireless energy transmission systems based on directional backtracking use the same or similar transmitting and receiving frequencies. Such an architecture is easy to design and reuse the transmitting and receiving antenna arrays, but it has the defects of insufficient transmitting and receiving isolation and insufficient transmitting energy. Moreover, most of them are only simple wireless energy transmission, and do not fully utilize the characteristics of the system's own architecture. On the basis of the original wireless energy transmission system, it organically combines wireless information transmission to realize the joint transmission of energy and information. Summary of the invention

[0006] In view of the problems existing in the prior art, the present invention provides a wireless signal energy simultaneous transmission system and method based on heterodyne directional backtracking.

[0007] The present invention is implemented in this way: a wireless signal transmission system based on different frequency direction tracing includes:

[0008] An electromagnetic energy and information receiving end and an electromagnetic energy and information transmitting end;

[0009] The electromagnetic energy and information receiving end comprises a guiding and receiving common-aperture antenna, a guiding signal radio frequency source, a power divider, an information demodulation module and a rectifying energy storage module; the guiding and receiving common-aperture antenna is connected to the guiding signal radio frequency source and the power divider, and the power divider is respectively connected to the information demodulation module and the rectifying energy storage module;

[0010] The guiding and receiving common-aperture antenna includes a guiding frequency transmitting antenna and a signal-energy simultaneous transmission frequency receiving antenna, which are respectively used to transmit electromagnetic waves of the guiding frequency and receive electromagnetic waves of the signal-energy simultaneous transmission frequency. The polarization modes of the guiding and receiving antennas are orthogonal, and the guiding signal and the signal-energy simultaneous transmission signal are narrowband signals whose frequencies do not have a harmonic relationship.

[0011] Further, the guidance signal radio frequency source is a microwave source, which is used to generate a continuous wave of the guidance signal frequency;

[0012] The power distributor is a coupler or a power divider, which is used to distribute the electromagnetic signals of different powers for information demodulation and energy rectification respectively;

[0013] The information demodulation module includes a down-mixer and a demodulator for demodulating the signal energy simultaneous transmission information;

[0014] The rectifying energy storage module comprises a connected rectifying circuit and a battery, wherein the rectifying circuit is composed of a rectifying diode and a matching circuit thereof.

[0015] Furthermore, the electromagnetic energy and information transmitting end includes a heterogeneous frequency and common aperture transmitting and receiving antenna array, a heterogeneous frequency direction tracing circuit and a guidance signal monitoring module.

[0016] Furthermore, the heterogeneous frequency and common aperture transceiver antenna array comprises a pilot frequency receiving antenna array and a signal energy simultaneous transmission frequency transmitting antenna array, both of which have the same number of units, coincident phase centers, and the same ratio of unit spacing to wavelength;

[0017] The different-frequency direction tracing circuit comprises a receiving down-mixing module, a signal loading and transmitting up-mixing module and a direct current power supply module.

[0018] Further, the receiving down-mixing module includes a filtering circuit, a low noise amplifier, and a down-mixer, which is used to down-mix the pilot signal to an intermediate frequency for information loading; the signal loading and transmitting up-mixing module includes an amplitude control circuit, a modulation signal generating circuit, an up-mixer, a filtering circuit, a phase compensation circuit, and a power amplifier circuit;

[0019] The up / down mixers in all the channels share a common local oscillator input, that is, the local oscillator input signals of the up / down mixers in all the channels are generated by the same signal source and are divided to each channel through a power divider, so as to ensure that the phase shift introduced by the mixer local oscillator to each channel is the same;

[0020] Among the down-mixer and up-mixer of each channel, one and only one of the mixers has an intermediate frequency input frequency higher than the radio frequency input frequency, and the intermediate frequency input frequency of the other mixer is lower than the radio frequency input frequency;

[0021] The amplitude control circuit comprises a gain-controlled amplifier circuit and a control voltage forming circuit, and the circuit gain is automatically controlled to achieve stable power output;

[0022] The modulation signal generating circuit adopts phase modulation PSK mode;

[0023] The phase compensation circuit is a phase shifter with an adjustable phase shift range of 0° to 360°;

[0024] The DC power supply module is connected to the 220V mains electricity and is connected to the guide signal monitoring module via an electric control switch.

[0025] Furthermore, the guidance signal monitoring module includes a detection antenna and a detector, and turns on or off the direct current power supply of the electromagnetic energy and information transmitting end according to the power of the guidance signal.

[0026] Another object of the present invention is to provide a wireless signal transmission method based on different frequency direction tracing, comprising:

[0027] Step 1, when the electromagnetic energy and the battery power in the information receiving terminal are lower than the set threshold, the guidance signal RF source generates a guidance signal S1 with a frequency of f1 and transmits it through the guidance antenna;

[0028] Step 2: The signal S1 is received by the electromagnetic energy and information transmitting end after space propagation. The guidance signal monitoring module judges based on the received power. If it is lower than the set threshold, the DC power supply of the inter-frequency direction tracing circuit is turned off. If it is higher than the set threshold, the DC power supply of the inter-frequency direction tracing circuit is turned on.

[0029] Step 3, the signal S1 received by the pilot frequency receiving antenna array is sent to the different frequency direction tracing circuit, and the signal S2 is obtained after the filter filters out other interference signals in the space;

[0030] Step 4, the signal S2 is amplified by a low noise amplifier, and then down-mixed by a mixer with a local oscillator signal frequency of f2, and an intermediate frequency signal S3 with a frequency of f3 is obtained after the spurious signal is filtered out by a filter;

[0031] Step 5: The signal S3 is input into a gain-controlled amplifier circuit for power amplification, and an intermediate frequency signal S4 with stable power is output;

[0032] Step 6, the signal S4 is input into a mixer whose local oscillator signal is a phase modulated signal with a frequency of f4 for up-mixing, and after the stray signal is filtered out by a filter, a modulated signal S5 with a frequency of f5 is obtained;

[0033] Step 7, the signal S5 is phase-compensated by the phase shifter, and different phase shift amounts are compensated for each channel to keep the phase shift amounts brought by each channel consistent, and then amplified by a multi-stage amplifier to output a high-power modulated signal S6 with a frequency of f5;

[0034] Step 8: Signal S6 is input into the electromagnetic energy and the information transmitting end's signal energy transmission frequency transmitting antenna, and is converted into electromagnetic waves and adaptively forwarded in the direction of the incident guidance signal;

[0035] Step 9, signal S6 is received by the electromagnetic energy and information receiving end's signal energy transmission frequency receiving antenna after propagation in space, and is input into the power divider after filtering out other interference signals in space, and is divided into two signals, s7 and s8;

[0036] Step 10, the signal S7 is input into the information demodulation module to demodulate the information it carries;

[0037] Step 11, the signal S8 is input into the rectifier tank circuit, converted into direct current and filtered out the fundamental wave and high-order harmonic components before being stored in the battery.

[0038] Another object of the present invention is to provide a computer device, comprising a memory and a processor, wherein the memory stores a computer program, and when the computer program is executed by the processor, the processor executes the steps of the wireless signal simultaneous transmission method based on heterofrequency direction tracing.

[0039] Another object of the present invention is to provide a computer-readable storage medium storing a computer program, which, when executed by a processor, enables the processor to execute the steps of the wireless signal simultaneous transmission method based on heterofrequency direction tracing.

[0040] Another object of the present invention is to provide an information data processing terminal, which is used to implement the wireless signal simultaneous transmission system based on heterofrequency direction tracing.

[0041] In combination with the above technical solutions and the technical problems solved, the advantages and positive effects of the technical solutions to be protected by the present invention are as follows:

[0042] First, compared with traditional technical solutions, the directional backtracking method of receiving and transmitting at different frequencies disclosed in the present invention has the advantages of fast response, adaptive tracking, and resistance to multipath and multi-frequency interference. The backtracking circuit uses a purely analog method to realize the backtracking function, and can perform directional backtransmission of energy and information without extracting the target position information. Moreover, due to the digital signal processing process without position information extraction, the system has a fast response speed and can adaptively track fast-moving targets. And because in a fixed usage scenario, the path of signal propagation is fixed, and the multipath waves that reach the power supply end after multiple reflections will return to the power consumption end along the propagation path, which can effectively resist the interference of multipath signals on target positioning. And because the receiving and transmitting frequencies are different, interference signals of different frequencies cannot trigger the same energy transmission signal as the set frequency, and it is difficult to interfere with the system.

[0043] Compared with the traditional wireless energy transmission system based on directional backtracking, the wireless signal and energy simultaneous transmission system based on heterodyne frequency directional backtracking disclosed in the present invention achieves higher transmit and receive isolation through the proposed system architecture of using different transmit and receive frequencies without harmonic relationships, polarization orthogonal transmit and receive antennas, two mixing cycles and multiple high-selectivity filters, and further improves the system's transmission power upper limit, so that the system can transmit more energy compared with traditional design schemes.

[0044] The wireless signal and energy simultaneous transmission system and method based on heterodyne directional tracing disclosed in the present invention fully utilizes the mixer for realizing phase conjugation originally required by the heterodyne directional tracing circuit in the power supply end, increases the signal transmission function by replacing the local oscillator signal source of the mixer, fully develops and utilizes the circuit structure of the energy transmission system based on heterodyne directional tracing, realizes the addition of new functions without adding additional components, and realizes the synchronous transmission of information and energy.

[0045] Second, the wireless signal energy simultaneous transmission system based on frequency-different direction backtracking provided by the present invention demonstrates an innovative design, which aims to solve the problem of low efficiency of wireless energy transmission and data transmission in the prior art, and significantly improves the reliability and versatility of the system. The following is a detailed description of the technical problems solved by the present invention and the significant technical progress achieved:

[0046] Technical problems solved by the prior art:

[0047] 1. Efficiency issues of wireless energy and data transmission: In traditional wireless energy transmission systems, energy and data are usually transmitted at the same frequency, which limits the transmission efficiency and distance because the optimal frequency for energy transmission and the optimal frequency for data transmission are often different.

[0048] 2. Signal interference problem: When using the same or similar frequencies for energy and data transmission, interference between signals is likely to occur, affecting the accuracy of data transmission and the effective transmission of energy.

[0049] 3. System flexibility and adaptability issues: Traditional systems lack flexibility in design and find it difficult to optimize performance based on specific application scenarios, especially in applications that require simultaneous transmission of data and energy.

[0050] Significant technological advances achieved:

[0051] 1. Improve transmission efficiency: By using the guiding and receiving co-aperture antennas to transmit data and energy at different frequencies, the present invention significantly improves the efficiency of wireless transmission. The design of the guiding frequency transmitting antenna and the signal-energy simultaneous transmission frequency receiving antenna enables energy and data to be transmitted at their optimal frequency, reducing energy loss and data bit error rate.

[0052] 2. Reduce signal interference: The present invention effectively avoids interference between the guidance signal and the simultaneous transmission signal by adopting orthogonal polarization and a narrowband signal design with no harmonic relationship in frequency, thereby ensuring clear signal transmission and efficient reception of energy.

[0053] 3. Enhance the versatility and reliability of the system: The system design that integrates the guidance signal and signal-energy simultaneous transmission technology not only improves the performance of energy and data transmission, but also enhances the stability and reliability of the system in complex environments by using orthogonal polarization and frequency separation technology.

[0054] 4. Improve the flexibility and adaptability of the system: The system design of the present invention allows the frequency and polarization to be flexibly adjusted according to application requirements, so that the system can adapt to different operating conditions and application scenarios, thereby achieving optimal performance in different practical applications.

[0055] The present invention has made significant technical progress in improving the transmission efficiency of the wireless signal and energy transmission system, reducing signal interference, enhancing the system's versatility, reliability and flexibility, and solving many technical problems existing in the prior art through its unique technical solution. These innovations make the present invention have important practical value in the field of wireless energy transmission and data communication.

[0056] Third, as auxiliary evidence of the inventiveness of the claims of the present invention, it is also reflected in the following important aspects:

[0057] (1) The expected benefits and commercial value of the technical solution of the present invention after transformation are:

[0058] After transformation, the technical solution of the present invention can solve the problems of power supply and information collection of various small electronic devices in unmanned outdoor and indoor scenarios. It does not require complicated wired network construction and manual battery replacement, can simplify the power replenishment process of small electronic devices, and at the same time has information transmission function, which greatly reduces the hardware cost of early equipment wiring and the labor cost of later maintenance.

[0059] (2) The technical solution of the present invention solves a technical problem that people have been eager to solve but have never been able to solve successfully:

[0060] The technical solution of the present invention solves the problem of power supply and communication of small electronic devices in specific environments, such as environmental information sensors in the wild and unmanned scenes, which are difficult to build wired cables and do not have the conditions to convert wind energy, solar energy, etc. into electrical energy, thus overcoming the technical difficulties in building a sustainable wireless sensor network.

[0061] (3) The technical solution of the present invention overcomes technical prejudice:

[0062] The technical solution of the present invention overcomes the technical difficulties of high requirements for transmit-receive isolation and difficulty in maintaining channel consistency in the directional backtracking system, solves the technical prejudice that the traditional directional backtracking system cannot transmit high-power microwave energy, and innovatively realizes the simultaneous transmission of high-power microwave energy and information in the far field by directional backtracking, giving full play to the advantages of self-tracking and fast response of the directional backtracking system. BRIEF DESCRIPTION OF THE DRAWINGS

[0063] Figure 1 It is a structural block diagram of a wireless signal energy simultaneous transmission system based on heterofrequency direction tracing provided by an embodiment of the present invention.

[0064] Figure 2 It is a schematic diagram of the principle of the tracing back function of the hetero-frequency direction tracing provided by an embodiment of the present invention.

[0065] Figure 3It is a schematic diagram of the top-down layout structure of the common-caliber transceiver antennas at the electromagnetic energy and information transmitting ends in the wireless signal-energy simultaneous transmission system based on heterofrequency directional tracing provided by an embodiment of the present invention.

[0066] Figure 4 It is a basic structural diagram of a wireless signal energy simultaneous transmission system based on heterofrequency direction tracing provided by an embodiment of the present invention.

[0067] Figure 5 It is a structural schematic diagram of the electromagnetic energy and information receiving end in the wireless signal energy simultaneous transmission system based on heterofrequency directional tracing provided by an embodiment of the present invention.

[0068] Figure 6 It is a structural schematic diagram of the electromagnetic energy and information transmitting end in the wireless signal energy simultaneous transmission system based on heterofrequency directional tracing provided by an embodiment of the present invention.

[0069] Figure 7 It is a flow chart of a wireless signal transmission method based on heterofrequency direction tracing provided by an embodiment of the present invention.

[0070] Figure 8 This is a test effect diagram provided by an embodiment of the present invention in a scenario where the distance between sending and receiving is 5 meters.

[0071] Fig. 9 It is a test result effect diagram provided by an embodiment of the present invention.

[0072] Figure 1 Chinese: 1. Electromagnetic energy and information receiving end; 2. Electromagnetic energy and information transmitting end. DETAILED DESCRIPTION

[0073] In order to make the purpose, technical solution 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 used to limit the present invention.

[0074] like Figure 1 As shown, a wireless signal transmission system based on heterodyne direction tracing provided by an embodiment of the present invention includes:

[0075] An electromagnetic energy and information receiving terminal 1 and an electromagnetic energy and information transmitting terminal 2;

[0076] The electromagnetic energy and information receiving end 1 comprises a guiding and receiving common-aperture antenna, a guiding signal radio frequency source, a power divider, an information demodulation module and a rectifying energy storage module; the guiding and receiving common-aperture antenna is connected to the guiding signal radio frequency source and the power divider, and the power divider is respectively connected to the information demodulation module and the rectifying energy storage module;

[0077] The guiding and receiving common-aperture antenna includes a guiding frequency transmitting antenna and a signal-energy simultaneous transmission frequency receiving antenna, which are respectively used to transmit electromagnetic waves of the guiding frequency and receive electromagnetic waves of the signal-energy simultaneous transmission frequency. The polarization modes of the guiding and receiving antennas are orthogonal, and the guiding signal and the signal-energy simultaneous transmission signal are narrowband signals whose frequencies do not have a harmonic relationship.

[0078] The working principle of the wireless signal energy simultaneous transmission system based on different frequency direction tracing provided by the embodiment of the present invention is as follows:

[0079] 1. Guidance signal and frequency direction tracing back:

[0080] In the electromagnetic energy and information receiving terminal 1, the guided frequency transmitting antenna in the guided and common aperture receiving antenna is responsible for generating and transmitting electromagnetic waves of the guided frequency. This guided signal is a narrowband signal used to guide the directional transmission of the electromagnetic energy and information transmitting terminal 2.

[0081] After the electromagnetic energy and information transmitting end 2 receives the guidance signal, it can adaptively point the transmitting beam to the direction of the guided electromagnetic wave by transmitting the signal phase without calculating the target position through the different-frequency direction tracing technology. The different-frequency direction tracing technology is developed based on the traditional direction tracing technology, and its characteristic is that the received guidance signal frequency is different from the transmitting signal frequency.

[0082] The electromagnetic energy and information transmitting end 2 sends the electromagnetic energy and information simultaneous transmission signal to the electromagnetic energy and information receiving end 1 in a directionally manner according to the phase of the received guidance signal.

[0083] 2. Reception and processing of simultaneous interpretation signals:

[0084] In the electromagnetic energy and information receiving terminal 1, the signal energy transmission frequency receiving antenna is responsible for receiving the electromagnetic wave of the signal energy transmission frequency. This electromagnetic wave contains both energy information and data information.

[0085] The received electromagnetic wave signal is distributed through the power divider. Part of the signal enters the information demodulation module for data demodulation and recovery; the other part of the signal enters the rectification energy storage module to convert the energy in the electromagnetic wave into electrical energy and store it.

[0086] 3. Orthogonal polarization mode:

[0087] The polarization modes of the guidance frequency transmitting antenna and the signal transmission frequency receiving antenna in the guidance and receiving common aperture antenna are orthogonal. This design can ensure that the guidance signal and the signal transmission signal do not interfere with each other during the transmission process, thus improving the stability and reliability of the system.

[0088] 4. Frequencies do not have harmonic relationships:

[0089] The pilot signal and the signal transmission signal are narrow-band signals whose frequencies do not have a harmonic relationship. This can avoid harmonic interference during the transmission process, which affects the signal quality and transmission efficiency.

[0090] Through the above working principle, the wireless signal energy simultaneous transmission system based on heterofrequency directional backtracking of the present invention can realize efficient transmission of electromagnetic energy and reliable transmission of information, while ensuring the stability and reliability of the signal during the transmission process.

[0091] The guidance signal radio frequency source provided in the embodiment of the present invention is a microwave source, which is used to generate a continuous wave of the guidance signal frequency;

[0092] The power distributor is a coupler or a power divider, which is used to distribute the electromagnetic signals of different powers for information demodulation and energy rectification respectively;

[0093] The information demodulation module includes a down-mixer and a demodulator for demodulating the signal energy simultaneous transmission information;

[0094] The rectifying energy storage module comprises a connected rectifying circuit and a battery, wherein the rectifying circuit is composed of a rectifying diode and a matching circuit thereof.

[0095] The electromagnetic energy and information transmitting end 2 provided in the embodiment of the present invention comprises a heterogeneous frequency and common aperture transmitting and receiving antenna array, a heterogeneous frequency direction tracing circuit and a guidance signal monitoring module.

[0096] The heterogeneous frequency and co-aperture transceiver antenna array provided in the embodiment of the present invention comprises a pilot frequency receiving antenna array and a signal energy simultaneous transmission frequency transmitting antenna array, the two antennas have the same number of units, the phase centers coincide, and the ratio of unit spacing to wavelength is the same;

[0097] The different-frequency direction tracing circuit comprises a receiving down-mixing module, a signal loading and transmitting up-mixing module and a direct current power supply module.

[0098] The receiving down-mixing module provided in the embodiment of the present invention comprises a filtering circuit, a low noise amplifier, and a down-mixer, and is used to down-mix the pilot signal to an intermediate frequency for information loading; the signal loading and transmitting up-mixing module comprises an amplitude control circuit, a modulation signal generating circuit, an up-mixer, a filtering circuit, a phase compensation circuit, and a power amplification circuit;

[0099] The up / down mixers in all the channels share a common local oscillator input, that is, the local oscillator input signals of the up / down mixers in all the channels are generated by the same signal source and are divided to each channel through a power divider, so as to ensure that the phase shift introduced by the mixer local oscillator to each channel is the same;

[0100] Among the down-mixer and up-mixer of each channel, one and only one of the mixers has an intermediate frequency input frequency higher than the radio frequency input frequency, and the intermediate frequency input frequency of the other mixer is lower than the radio frequency input frequency;

[0101] The amplitude control circuit comprises a gain-controlled amplifier circuit and a control voltage forming circuit, and the circuit gain is automatically controlled to achieve stable power output;

[0102] The modulation signal generating circuit adopts phase modulation (PSK) mode;

[0103] The phase compensation circuit is a phase shifter with an adjustable phase shift range of 0° to 360°;

[0104] The DC power supply module is connected to the 220V mains electricity and is connected to the guide signal monitoring module via an electric control switch.

[0105] The guidance signal monitoring module provided in the embodiment of the present invention includes a detection antenna and a detector, and turns on or off the direct current power supply of the electromagnetic energy and the information transmitting terminal 2 according to the power of the guidance signal.

[0106] like Figure 7 As shown, a wireless signal transmission method based on heterodyne direction backtracking provided by an embodiment of the present invention includes:

[0107] Step 1, when the electromagnetic energy and the battery power in the information receiving terminal 1 are lower than the set threshold, the guidance signal RF source generates a guidance signal S1 with a frequency of f1 and transmits it via the guidance antenna;

[0108] Step 2: Signal S1 is received by the electromagnetic energy and information transmitting terminal 2 after space propagation. The guidance signal monitoring module judges based on the received power. If it is lower than the set threshold, the DC power supply of the inter-frequency direction tracing circuit is turned off. If it is higher than the set threshold, the DC power supply of the inter-frequency direction tracing circuit is turned on.

[0109] Step 3, the signal S1 received by the pilot frequency receiving antenna array is sent to the different frequency direction tracing circuit, and the signal S2 is obtained after the filter filters out other interference signals in the space;

[0110] Step 4, the signal S2 is amplified by a low noise amplifier, and then down-mixed by a mixer with a local oscillator signal frequency of f2, and an intermediate frequency signal S3 with a frequency of f3 is obtained after the spurious signal is filtered out by a filter;

[0111] Step 5: The signal S3 is input into a gain-controlled amplifier circuit for power amplification, and an intermediate frequency signal S4 with stable power is output;

[0112] Step 6, the signal S4 is input into a mixer whose local oscillator signal is a phase modulated signal with a frequency of f4 for up-mixing, and after the stray signal is filtered out by a filter, a modulated signal S5 with a frequency of f5 is obtained;

[0113] Step 7, the signal S5 is phase-compensated by the phase shifter, and different phase shift amounts are compensated for each channel to keep the phase shift amounts brought by each channel consistent, and then amplified by a multi-stage amplifier to output a high-power modulated signal S6 with a frequency of f5;

[0114] Step 8: Signal S6 is input into the electromagnetic energy and the information transmitting end 2's signal energy transmission frequency transmitting antenna, and is converted into electromagnetic waves and adaptively forwarded in the direction of the incident guidance signal;

[0115] Step 9, signal S6 is received by the electromagnetic energy and information receiving terminal 1 through the space propagation signal and the signal energy transmission frequency receiving antenna, and after being filtered out by the filter to remove other interference signals in the space, it is input into the power divider and divided into two signals S7 and S8;

[0116] Step 10, the signal S7 is input into the information demodulation module to demodulate the information it carries;

[0117] Step 11, the signal S8 is input into the rectifier tank circuit, converted into direct current and filtered out the fundamental wave and high-order harmonic components before being stored in the battery.

[0118] Another object of the present invention is to provide a computer device, comprising a memory and a processor, wherein the memory stores a computer program, and when the computer program is executed by the processor, the processor executes the steps of the wireless signal simultaneous transmission method based on heterofrequency direction tracing.

[0119] Another object of the present invention is to provide a computer-readable storage medium storing a computer program, which, when executed by a processor, enables the processor to execute the steps of the wireless signal simultaneous transmission method based on heterofrequency direction tracing.

[0120] Another object of the present invention is to provide an information data processing terminal, which is used to implement the wireless signal simultaneous transmission system based on heterofrequency direction tracing.

[0121] The following describes the embodiments in detail.

[0122] 1. Technical Principle of the Invention

[0123] The signal energy simultaneous transmission system proposed in the present invention is based on the heterodyne directional tracing technology, and its principle is the phase conjugation theory based on the antenna array theory, that is, the phase difference between each unit corresponding to the transmitting and receiving antennas is opposite. Due to the different directions of transmitting and receiving propagation, the transmitted signal will be transmitted back along the direction of the incoming wave.

[0124] In such Figure 2 In the two-dimensional planar antenna array shown, the quadrilateral represents the receiving unit, the circle represents the transmitting unit, and the spatial Cartesian coordinate system is established with the receiving unit at the outermost corner as the coordinate origin, and all units are included in the first quadrant of the xoy plane. The unit and the corresponding transmitting unit (coordinate position is (xs, ys)) are used as the reference units for receiving and transmitting respectively. For the mnth receiving antenna unit with the coordinate position (xrm, yrn), the receiving frequency is fr, which is used as the receiving frequency from When the far-field plane wave comes from the direction, the amplitude of the received signal of each unit is consistent, and the phase difference between the mnth receiving unit and the reference unit is After being processed by the proposed directional tracing circuit, each channel passes through a mixer whose local oscillator frequency is higher than the RF input frequency, and its phase difference is inverted. The phase shift introduced by the other devices is compensated to be equal by the phase shifter. At the same time, since the phase shift introduced by the phase modulation of the signal is the same at every moment, that is, the relative value is 0, which does not affect the phase difference between the units. Therefore, when the signal reaches the mnth transmitting antenna unit with the corresponding coordinates (xs+xtm,ys+ytn), the transmitting frequency is ft, and its phase difference with the reference unit is

[0125] For an antenna unit in a transmitting antenna array, when the transmitting beam points to When the coordinates are (xs+xtm, ys+ytn), the phase difference between the mnth unit and the reference unit is If the transmitting direction is the same as the incoming wave direction, You need to have:

[0126]

[0127] When the phase centers of the transceiver arrays coincide, if the spacing between the corresponding units of the transceiver arrays of different frequencies is inversely proportional to their operating frequencies, that is, At this time β t x tm +β t y tn =β r x rm +β r y rn ,like Figure 3As shown (taking a uniformly arranged two-dimensional planar array as an example, the rectangle and circle represent the receiving and transmitting antenna units respectively), at this time, formula (1) holds, and the beam pointing of the transceiver array satisfies That is, the waves transmitted by each transmitting antenna unit are superimposed in phase in the same direction as the incident wave. Since the phase difference and distance difference between units are considered, it is also applicable to arrays with non-uniform distribution of units. At this time, the array beam points to the direction of the incoming wave, and there is no need to extract the position information of the incoming wave direction, so the transmitting beam can achieve adaptive tracking of the incoming wave direction.

[0128] like Figure 4 As shown, the present invention proposes a wireless signal and energy simultaneous transmission system based on heterodyne directional backtracking, including an electromagnetic energy and information receiving end (power consumption end) and an electromagnetic energy and information transmitting end (power supply end).

[0129] The specific structure of the electromagnetic energy and information receiving end is as follows Figure 5 As shown, it includes a transceiver antenna, a signal source, a filter, a power divider, a rectifier energy storage circuit and an information demodulation circuit, wherein the transceiver antenna is composed of a single guided signal transmitting antenna and a signal-energy simultaneous transmission signal receiving antenna array with a common aperture, which converts electromagnetic waves and guided waves in space; the signal source provides a guided continuous wave signal for the transmitting antenna; the received signal-energy simultaneous transmission signal is filtered out by a filter and then divided into two signals of unequal power through a power divider, which are used for energy transmission and communication respectively; the rectifier energy storage circuit includes a rectifier circuit and a battery, which uses the nonlinearity of a diode to rectify microwave energy into DC power and store it in a battery, and the battery is used to power the signal source and the information demodulation circuit; the information demodulation circuit demodulates and extracts information after down-mixing through carrier synchronization, phase detection, and information recovery.

[0130] Figure 6 The specific structure of the proposed electromagnetic energy and information transmitting end includes: a detection control module, a direct current power supply module, a traceback communication module and a transceiver antenna, wherein the detection control module includes: a detection receiving antenna, a detector, and a control switch, and the on-off of the switch of the direct current power supply module is determined according to the input signal; the direct current power supply module is connected to the 220V mains power and is used to power the active devices in the circuit after voltage transformation; the traceback communication module includes a filter, a low noise amplifier, a down-mixer, an automatic gain control, a modulation up-mixer, a phase compensation and a power amplifier, wherein the intermediate frequency input frequency of one and only one mixer in the two mixing parts is higher than the radio frequency input frequency, and the intermediate frequency input frequency of the other mixer is lower than the radio frequency input frequency, which is used to achieve phase conjugation; the transceiver antenna includes a transceiver antenna array with a common phase center and a common aperture distribution, and the ratio of the spacing between the corresponding receiving and transmitting units is equal to the ratio of the transmitting frequency to the receiving frequency, that is, the ratio of the spacing of the transceiver array to the wavelength is equal.

[0131] Figure 7 This is the workflow of the proposed wireless signal simultaneous transmission method based on different frequency direction tracing.

[0132] First, determine whether the current electromagnetic energy and the battery power in the information receiving end are lower than the set threshold. If so, turn on the guidance signal RF source power supply to generate a guidance signal S1 with a frequency of f1 and transmit it through the guidance antenna; if not, turn off the power supply.

[0133] Subsequently, the signal S1 is received by the detection receiving antenna and the backtracking receiving antenna of the electromagnetic energy and information transmitting end after propagation in space. The guiding signal received by the detection receiving antenna is judged by the detector whether the power is higher than the set threshold value, and the DC power supply of the frequency direction backtracking circuit is controlled to control whether the transmitting end works or not. If it is lower than the set threshold value, the DC power supply of the frequency direction backtracking circuit is turned off, and if it is higher than the set threshold value, the DC power supply of the frequency direction backtracking circuit is turned on.

[0134] When the DC power supply of the inter-frequency direction tracing circuit is turned on, the signal S1 received by the tracing receiving antenna array is sent to the inter-frequency direction tracing circuit for phase conjugation processing, phase modulation, amplification and tracing transmission. The specific steps are as follows: after filtering out other interference signals in the space, a signal S2 is obtained; after amplifying the power through a low-noise amplifier, down-mixing is performed through a mixer whose local oscillator signal frequency is f2, and after filtering out stray signals through a filter, an intermediate frequency signal S3 with a frequency of f3 is obtained; power amplification is performed through a gain-controlled amplifier circuit, and an intermediate frequency signal S4 with stable power is output; signal loading and up-mixing is performed through a mixer whose local oscillator is a phase modulation signal with a frequency of f4, and after filtering out stray signals through a filter, a modulated signal S5 with a frequency of f5 is obtained; phase compensation is performed through a phase shifter, and different phase shift amounts are compensated for each channel to keep the phase shift amounts brought by each channel consistent, and after power amplification through a multi-stage amplifier, a high-power modulated signal S6 with a frequency of f5 is output, and the electromagnetic energy is input into the transmitting antenna with the signal energy of the information transmitting end, and converted into an electromagnetic wave and adaptively forwarded in the direction of the incident direction of the guidance signal.

[0135] Subsequently, the simultaneous transmission signal S6 is received by the simultaneous transmission frequency receiving antenna of the electromagnetic energy and information receiving end through space propagation, and after being filtered out by the filter to remove other interference signals in the space, it is input into the power divider and divided into two signals S7 and S8.

[0136] Signal S7 is input into the information demodulation module to demodulate the information it carries.

[0137] The signal S8 is input into the rectifier energy storage circuit, converted into direct current, filtered out the fundamental wave and high-order harmonic components, and then stored in the battery.

[0138] It should be noted that the embodiments of the present invention can be implemented by hardware, software, or a combination of software and hardware. The hardware part can be implemented using dedicated logic; the software part can be stored in a memory and executed by an appropriate instruction execution system, such as a microprocessor or dedicated design hardware. It can be understood by a person of ordinary skill in the art that the above-mentioned devices and methods can be implemented using computer executable instructions and / or contained in a processor control code, such as a carrier medium such as a disk, CD or DVD-ROM, a programmable memory such as a read-only memory (firmware), or a data carrier such as an optical or electronic signal carrier. Such code is provided on the carrier medium. The device and its modules of the present invention can be implemented by hardware circuits such as very large-scale integrated circuits or gate arrays, semiconductors such as logic chips, transistors, etc., or programmable hardware devices such as field programmable gate arrays, programmable logic devices, etc., can also be implemented by software executed by various types of processors, and can also be implemented by a combination of the above-mentioned hardware circuits and software, such as firmware.

[0139] The present invention has developed a prototype to verify the principle and some functions of the proposed wireless signal transmission system based on frequency-different direction tracing. 3.8GHz and 5.8GHz are selected as the frequencies of the guidance and signal transmission signals, respectively. The electromagnetic energy and information receiving end 1 is transmitted by a single antenna with a point frequency signal source, and the 4×4 receiving antenna array receives the signal. The rectifier circuit and oscilloscope are connected to perform energy conversion and information reception verification, respectively. The electromagnetic energy and information transmitting end 2 uses a single antenna followed by a low noise amplifier and a detector for monitoring, and the 8×8 array antenna is equipped with a 64-channel tracing circuit to realize tracing energy transmission and communication.

[0140] During the experiment, the verification of the backtracking function was first tested. Figure 8 In the scenario where the distance between the transmitter and receiver is 5 meters, the electromagnetic energy and information receiving end 1 were tested for the microwave power intensity received at different angles when it moved in the horizontal plane. The test results are as follows Fig. 9 As shown, it shows good adaptive beam tracking characteristics and has higher power reception for conversion into DC signal and communication demodulation.

[0141] The receiving antenna in the electromagnetic energy and information receiving end 1 is connected to a rectifier circuit and an information demodulation module for verification. The DC power converted by the rectifier module is sufficient to supply the temperature and humidity sensor to work and transmit the sensing information back; the error vector amplitude of the BPSK signal demodulated by the information demodulation module is less than 7.5%.

[0142] The above description is only a specific implementation mode of the present invention, but the protection scope of the present invention is not limited thereto. Any modifications, equivalent substitutions and improvements made by any technician familiar with the technical field within the technical scope disclosed by the present invention and within the spirit and principle of the present invention should be covered by the protection scope of the present invention.

Claims

1. A wireless signal transmission system based on frequency-different direction tracing, characterized in that: include: An electromagnetic energy and information receiving end and an electromagnetic energy and information transmitting end; The electromagnetic energy and information receiving end comprises a guiding and receiving common-aperture antenna, a guiding signal radio frequency source, a power divider, an information demodulation module and a rectifying energy storage module; the guiding and receiving common-aperture antenna is connected to the guiding signal radio frequency source and the power divider, and the power divider is respectively connected to the information demodulation module and the rectifying energy storage module; The guiding and receiving common-aperture antenna includes a guiding frequency transmitting antenna and a signal-energy simultaneous transmission frequency receiving antenna, which are respectively used to transmit electromagnetic waves of the guiding frequency and receive electromagnetic waves of the signal-energy simultaneous transmission frequency. The polarization modes of the guiding and receiving antennas are orthogonal, and the guiding signal and the signal-energy simultaneous transmission signal are narrowband signals whose frequencies do not have a harmonic relationship.

2. The wireless signal transmission system based on frequency-different direction tracing as claimed in claim 1, characterized in that: The guidance signal radio frequency source is a microwave source, which is used to generate a continuous wave of the guidance signal frequency; The power distributor is a coupler or a power divider, which is used to distribute the electromagnetic signals of different powers for information demodulation and energy rectification respectively; The information demodulation module includes a down-mixer and a demodulator for demodulating the signal energy simultaneous transmission information; The rectifying energy storage module comprises a connected rectifying circuit and a battery, wherein the rectifying circuit is composed of a rectifying diode and a matching circuit thereof.

3. The wireless signal transmission system based on frequency-different direction tracing as claimed in claim 1, characterized in that: The electromagnetic energy and information transmitting end comprises a heterogeneous frequency and common aperture transmitting and receiving antenna array, a heterogeneous frequency direction tracing circuit and a guidance signal monitoring module.

4. The wireless signal transmission system based on frequency-different direction tracing as claimed in claim 3, characterized in that: The heterogeneous frequency and common aperture transceiver antenna array comprises a pilot frequency receiving antenna array and a signal energy simultaneous transmission frequency transmitting antenna array, the two antennas have the same number of units, the phase centers coincide, and the ratio of unit spacing to wavelength is the same; The different-frequency direction tracing circuit comprises a receiving down-mixing module, a signal loading and transmitting up-mixing module and a direct current power supply module.

5. The wireless signal transmission system based on frequency-different direction tracing as claimed in claim 4, characterized in that: The receiving down-mixing module includes a filtering circuit, a low noise amplifier, and a down-mixer, which is used to down-mix the pilot signal to an intermediate frequency for information loading; the signal loading and transmitting up-mixing module includes an amplitude control circuit, a modulation signal generating circuit, an up-mixer, a filtering circuit, a phase compensation circuit, and a power amplifier circuit; The up / down mixers in all the channels share a common local oscillator input, that is, the local oscillator input signals of the up / down mixers in all the channels are generated by the same signal source and are divided to each channel through a power divider, so as to ensure that the phase shift introduced by the mixer local oscillator to each channel is the same; Among the down-mixer and up-mixer of each channel, one and only one of the mixers has an intermediate frequency input frequency higher than the radio frequency input frequency, and the intermediate frequency input frequency of the other mixer is lower than the radio frequency input frequency; The amplitude control circuit comprises a gain-controlled amplifier circuit and a control voltage forming circuit, and the circuit gain is automatically controlled to achieve stable power output; The modulation signal generating circuit adopts phase modulation PSK mode; The phase compensation circuit is a phase shifter with an adjustable phase shift range of 0° to 360°; The DC power supply module is connected to the 220V mains electricity and is connected to the guide signal monitoring module via an electric control switch.

6. The wireless signal transmission system based on frequency-different direction tracing as claimed in claim 5, characterized in that: The guidance signal monitoring module includes a detection antenna and a detector, and turns on or off the direct current power supply of the electromagnetic energy and information transmitting end according to the power of the guidance signal.

7. A wireless signal transmission method based on different frequency direction tracing for implementing the wireless signal transmission system based on different frequency direction tracing as claimed in any one of claims 1 to 6, characterized in that: The wireless signal energy simultaneous transmission method based on different frequency direction backtracking includes: Step 1, when the electromagnetic energy and the battery power in the information receiving terminal 1 are lower than the set threshold, the guidance signal RF source generates a guidance signal S1 with a frequency of f1 and transmits it via the guidance antenna; Step 2: Signal S1 is received by the electromagnetic energy and information transmitting terminal 2 after space propagation. The guidance signal monitoring module judges based on the received power. If it is lower than the set threshold, the DC power supply of the inter-frequency direction tracing circuit is turned off. If it is higher than the set threshold, the DC power supply of the inter-frequency direction tracing circuit is turned on. Step 3, the signal S1 received by the pilot frequency receiving antenna array is sent to the different frequency direction tracing circuit, and the signal S2 is obtained after the filter filters out other interference signals in the space; Step 4, the signal S2 is amplified by a low noise amplifier, and then down-mixed by a mixer with a local oscillator signal frequency of f2, and an intermediate frequency signal S3 with a frequency of f3 is obtained after the spurious signal is filtered out by a filter; Step 5: The signal S3 is input into a gain-controlled amplifier circuit for power amplification, and an intermediate frequency signal S4 with stable power is output; Step 6, the signal S4 is input into a mixer whose local oscillator signal is a phase modulated signal with a frequency of f4 for up-mixing, and after the stray signal is filtered out by a filter, a modulated signal S5 with a frequency of f5 is obtained; Step 7, the signal S5 is phase-compensated by the phase shifter, and different phase shift amounts are compensated for each channel to keep the phase shift amounts brought by each channel consistent, and then amplified by a multi-stage amplifier to output a high-power modulated signal S6 with a frequency of f5; Step 8: Signal S6 is input into the electromagnetic energy and the information transmitting end 2's signal energy transmission frequency transmitting antenna, and is converted into electromagnetic waves and adaptively forwarded in the direction of the incident guidance signal; Step 9, signal S6 is received by the electromagnetic energy and information receiving terminal 1 through the space propagation signal and the signal energy transmission frequency receiving antenna, and after being filtered out by the filter to remove other interference signals in the space, it is input into the power divider and divided into two signals S7 and S8; Step 10, the signal S7 is input into the information demodulation module to demodulate the information it carries; Step 11, the signal S8 is input into the rectifier tank circuit, converted into direct current and filtered out the fundamental wave and high-order harmonic components before being stored in the battery.

8. A computer device, characterized in that: The computer device includes a memory and a processor, the memory stores a computer program, and when the computer program is executed by the processor, the processor executes the steps of the wireless signal simultaneous transmission method based on heterofrequency direction tracing as described in claim 7.

9. A computer-readable storage medium storing a computer program, wherein when the computer program is executed by a processor, the processor executes the steps of the wireless signal simultaneous transmission method based on heterodyne direction tracing as claimed in claim 7.

10. An information data processing terminal, characterized in that: The information data processing terminal is used to implement the wireless signal simultaneous transmission system based on heterofrequency direction tracing as described in any one of claims 1-6.

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