Wireless tag device, system and communication method

Abstract

The present invention relates to the field of wireless communication technology, and proposes a wireless tag device, system and communication method, wherein a tag information module is used to send a tag signal to a frequency conversion module under the drive of a first microwave signal with a first frequency, and the frequency conversion module is driven to generate a second microwave signal with a second frequency carrying tag information by acting alone or in conjunction with the first microwave signal, and an antenna module is used to realize the reception and transmission of the first microwave signal and the second microwave signal in free space. Based on the transceiver heterogeneous frequency communication system, on the one hand, it can overcome the problems of short communication distance and serious co-frequency interference existing in the transceiver co-frequency communication system; on the other hand, by loading the tag information into the heterogeneous frequency return signal, it can realize the accurate identification and positioning of many wireless tag devices within the communication coverage area of ​​the transceiver device, and overcome the problems of limited number of wireless tag devices carried by the same transceiver device under the transceiver heterogeneous frequency communication system and complex debugging in the prior art.

Description

Technical Field

[0001] The present invention relates to the field of wireless communication technology, and in particular to a wireless tag device, system and communication method. Background Art

[0002] Existing IoT technologies can be divided into active IoT technologies and passive IoT technologies according to whether the terminal needs external energy supply. On the one hand, active IoT technologies require batteries or wired methods to provide DC power to the terminal, which requires operations such as battery replacement or wiring installation, greatly increasing the cost of terminal deployment and subsequent maintenance. On the other hand, common passive IoT technologies such as RFID often have the same frequency for uplink and downlink carrier signals, which can easily lead to practical difficulties such as same-frequency blocking and limited wireless communication distance, and the above difficulties are difficult to overcome.

[0003] In response to the above problems, passive wireless frequency conversion technology came into being, but it still has some shortcomings. For example, the existing passive wireless frequency conversion technology usually adopts frequency resolution technology. When there are multiple wireless tag terminals within the communication range of the transceiver, due to the use of frequency division addressing, it faces the problem that the communication bandwidth can only accommodate a limited number of wireless tag terminals. Summary of the invention

[0004] In order to solve at least one technical problem in the above-mentioned prior art, the present invention provides a wireless tag device, system and communication method.

[0005] A first aspect of the present invention provides a wireless tag device, comprising: an antenna module, a tag information module and a frequency conversion module;

[0006] The antenna module, the tag information module and the frequency conversion module are electrically connected in pairs;

[0007] The antenna module is configured to receive a first microwave signal having a first frequency in free space, and to send a second microwave signal having a second frequency into the free space; wherein the second microwave signal carries tag information;

[0008] The tag information module is configured to send a tag signal to the frequency conversion module under the drive of the first microwave signal;

[0009] The frequency conversion module is configured to generate a second microwave signal carrying tag information according to the first microwave signal and the tag signal, or is configured to generate a second microwave signal carrying tag information according to the tag signal.

[0010] Optionally, the antenna module includes: a first antenna and a power distribution module; the first antenna is electrically connected to the power distribution module; the power distribution module includes an input port and two output ports, the input port is electrically connected to the first antenna, and the two output ports are electrically connected to the tag information module and the frequency conversion module respectively;

[0011] Alternatively, it comprises: a first antenna and a second antenna; the first antenna is electrically connected to the tag information module, and the second antenna is electrically connected to the frequency conversion module;

[0012] Alternatively, it includes: a first antenna, a second antenna and a four-port directional coupler, the four-port directional coupler having a first coupler port, a second coupler port, a third coupler port and a fourth coupler port; the first coupler port is electrically connected to the first antenna, the second coupler port is electrically connected to the tag information module, the third coupler port is electrically connected to the second antenna, and the fourth coupler port is electrically connected to the frequency conversion module.

[0013] Optionally, the tag information module specifically includes: an energy conversion circuit, an energy management circuit and a control circuit;

[0014] The energy conversion circuit is electrically connected to the antenna module and the energy management circuit respectively, and the control circuit is electrically connected to the energy management circuit and the frequency conversion module respectively;

[0015] The energy conversion circuit is configured to convert the first microwave signal from the antenna module into direct current;

[0016] The energy management circuit is configured to store and control the direct current, and drive the control circuit to generate a tag signal;

[0017] The control circuit is configured to generate and output a tag signal corresponding to the tag information according to the internally stored tag information.

[0018] Optionally, the wireless tag device further includes a sensor module;

[0019] The sensing module is electrically connected to the control circuit in the tag information module; the sensing module is configured to sense the physical quantity of the object to be measured, and the control circuit is configured to store the physical quantity sensed by the sensing module and encode the stored physical quantity into the tag signal;

[0020] Alternatively, the sensing module is electrically connected to the control circuit and the energy management circuit in the tag information module respectively; the sensing module is configured to sense the physical quantity of the object to be measured; the energy management circuit is configured to provide electrical energy to the sensing module, and the control circuit is configured to store the physical quantity sensed by the sensing module and encode the stored physical quantity into the tag signal.

[0021] Optionally, an auxiliary energy module is also included;

[0022] The auxiliary energy module is electrically connected to the tag information module, and the auxiliary energy module is configured to provide electrical energy to the tag information module; the tag information module is configured to store and manage the electrical energy provided by the auxiliary energy module;

[0023] Alternatively, the auxiliary energy module is electrically connected to the energy management circuit of the sensor module and the tag information module; the auxiliary energy module is configured to provide electrical energy to the sensor module and the energy management circuit, and the energy management circuit is configured to store and manage the electrical energy provided by the auxiliary energy module.

[0024] Optionally, the frequency conversion module includes: a voltage-controlled oscillator; the voltage-controlled oscillator is electrically connected to the antenna module and the tag information module respectively; the tag information module provides an input control voltage for the voltage-controlled oscillator, and the voltage-controlled oscillator is configured to generate a signal having an output frequency corresponding to the input control voltage according to the input control voltage;

[0025] Alternatively, it includes: a voltage-controlled oscillator, a first filter and a second filter; the first filter and the second filter are electrically connected to the voltage-controlled oscillator respectively, the voltage-controlled oscillator is also electrically connected to the control circuit in the tag information module, the first filter is also electrically connected to the energy conversion circuit in the tag information module, and the second filter is also electrically connected to the antenna module; the tag information module provides an input control voltage for the voltage-controlled oscillator, and the voltage-controlled oscillator is configured to generate a signal with an output frequency corresponding to the input control voltage according to the input control voltage; the first filter is configured to pass a signal with a first frequency, and the second filter is configured to pass a signal with a second frequency.

[0026] Optionally, the input control voltage is configured as a voltage-type tag signal output by the tag information module;

[0027] Alternatively, the input control voltage is configured as a voltage-type tag signal after the current-type tag signal output by the tag information module is converted by a current-to-voltage conversion circuit;

[0028] Alternatively, the input control voltage is configured as an on-off keying signal or an amplitude shift keying signal output by a tag information module, and the frequency conversion module is configured to generate a third frequency signal corresponding to a low level and a fourth frequency signal corresponding to a high level in response to the on-off keying signal or the amplitude shift keying signal; wherein one of the third frequency signal and the fourth frequency signal has a first frequency, and the other has a second frequency.

[0029] Optionally, the frequency conversion module includes: a voltage-controlled oscillator and a switching device, the voltage-controlled oscillator being electrically connected to the switching device and an energy management circuit in the tag information module, respectively, and the switching device being electrically connected to an antenna module and a control circuit in the tag information module, respectively; the energy management circuit being configured to provide a constant input control voltage to the voltage-controlled oscillator, and the voltage-controlled oscillator being configured to output a signal with a second frequency according to the input control voltage; the switching device being configured to perform amplitude modulation on the signal with the second frequency according to the tag signal output by the control circuit, to generate a second microwave signal carrying the tag information.

[0030] Optionally, the frequency conversion module includes: a mixer and a voltage-controlled oscillator; the mixer is electrically connected to the antenna module and the voltage-controlled oscillator respectively; the third frequency signal corresponding to the low level and the fourth frequency signal corresponding to the high level in the on-off keying signal or the amplitude shift keying signal output by the voltage-controlled oscillator are respectively mixed with the first microwave signal from the antenna module in the mixer to obtain a sixth frequency signal and a seventh frequency signal respectively; wherein one of the sixth frequency signal and the seventh frequency signal has the second frequency;

[0031] Alternatively, it includes: a mixer, a first filter, a second filter and a voltage-controlled oscillator; the mixer is electrically connected to the antenna module and the second filter respectively; the first filter and the second filter are electrically connected to the voltage-controlled oscillator respectively, the voltage-controlled oscillator is also electrically connected to the control circuit in the tag information module, and the first filter is also electrically connected to the energy conversion circuit in the tag information module; the voltage-controlled oscillator outputs a third frequency signal corresponding to a low level and a fourth frequency signal corresponding to a high level in an on-off keying signal or an amplitude shift keying signal, and the third frequency signal or the fourth frequency signal is mixed with the first microwave signal from the antenna module in the mixer after passing through the second filter to obtain an eighth frequency signal; wherein the eighth frequency signal has a sum frequency or a difference frequency of the second frequency and the first frequency.

[0032] Optionally, the frequency conversion module specifically includes: a first modulation element, a first resonant network, and a second resonant network;

[0033] The first modulation element has a first modulation port, a second modulation port and a third modulation port, the first modulation port is electrically connected to the antenna module, the second modulation port is electrically connected to the first resonance network, and the third modulation port is electrically connected to the second resonance network;

[0034] The first modulation element is configured to mix the first microwave signal with the first frequency of the first modulation port with the oscillation signal with the second resonant frequency fed into the second resonant network to obtain a mixed signal with the second frequency and without carrying label information;

[0035] The label information module is electrically connected to the first modulation port, the first resonant network or the second resonant network;

[0036] The first modulation element is further configured to add the tag signal of the tag information module to the mixed signal having the second frequency and not carrying the tag information to form a second microwave signal carrying the tag information.

[0037] Optionally, the first modulation element is configured as a transistor having a heterojunction.

[0038] Optionally, the second resonant network includes: a piezoelectric resonator;

[0039] One end of the piezoelectric resonator is electrically connected to the first modulation element, and the other end is grounded or electrically connected to the tag information module through an electrically connected capacitor.

[0040] Optionally, the frequency conversion module includes: a Schottky diode and a second modulation element; the anode of the Schottky diode is electrically connected to the antenna module, the cathode is electrically connected to the antenna module and the second modulation element, and the second modulation element is also electrically connected to the tag information module;

[0041] Alternatively, the device comprises: a Schottky diode, a second modulation element, a first filter, and a second filter; the first filter is electrically connected to the antenna module and the anode of the Schottky diode, respectively, and the second filter is electrically connected to the antenna module and the cathode of the Schottky diode, respectively; the first filter is configured to pass a signal having a first frequency, and the second filter is configured to pass a signal having a second frequency;

[0042] The Schottky diode is configured to convert a first microwave signal having a first frequency into a frequency-doubled signal having an output frequency of a second frequency, and when the frequency-doubled signal is loaded with a tag signal of a tag information module transmitted by a second modulation element, generates a second microwave signal carrying tag information and having a second frequency.

[0043] A second aspect of the present invention provides a wireless tag system, comprising: a transceiver and a wireless tag device as described in any one of the above;

[0044] The transceiver is configured to transmit a first microwave signal having a first frequency to the wireless tag device, and receive a second microwave signal having a second frequency returned by the wireless tag device, wherein the second frequency is different from the first frequency;

[0045] The second microwave signal with the second frequency carries label information.

[0046] A third aspect of the present invention provides a wireless communication method for use in the wireless tag system as described above, comprising:

[0047] S1: The transceiver sends a first microwave signal having a first frequency;

[0048] S2: The wireless tag device receives a first microwave signal having a first frequency, and returns a second microwave signal having a second frequency and carrying tag information to the transceiver device;

[0049] S3: The transceiver receives and analyzes the second microwave signal to obtain tag information.

[0050] The present invention has at least the following beneficial effects:

[0051] Due to the adoption of a heterogeneous frequency communication system, on the one hand, the problems existing in the same-frequency communication system of transceiver and transceiver can be overcome, such as short communication distance and serious same-frequency interference; on the other hand, by loading the tag information into the heterogeneous frequency return signal, accurate identification and positioning of numerous wireless tag devices within the communication coverage area of ​​the transceiver can be achieved, thus overcoming the problems of limited number of wireless tag devices carried by the same transceiver and complex debugging under the heterogeneous frequency communication system of transceiver in the prior art.

[0052] By combining energy harvesting technology, low-power computing technology and passive frequency conversion technology, passive frequency conversion transmission of digital information is realized, and information coding, channel capacity, anti-interference and anti-collision capabilities are provided, overcoming the defects of traditional passive wireless frequency conversion technology, increasing the reliability of passive wireless frequency conversion technology, and reducing the difficulty of engineering deployment. Combined with the characteristics of this solution that it does not require power supply, has a simple structure and is easy to drive, it has increased its application capabilities in industrial scenarios such as identity recognition, positioning, inventory counting, logistics, and electricity. BRIEF DESCRIPTION OF THE DRAWINGS

[0053] Figure 1 A schematic diagram of the structure of a wireless tag device provided by an embodiment of the present invention;

[0054] Figure 2 A schematic diagram of a structure of an antenna module provided in an embodiment of the present invention;

[0055] Figure 3 A second structural schematic diagram of the antenna module provided by an embodiment of the present invention;

[0056] Figure 4 A third structural schematic diagram of the antenna module provided by an embodiment of the present invention;

[0057] Figure 5 A schematic diagram of the structure of a tag information module provided in an embodiment of the present invention;

[0058] Figure 6 A schematic diagram of a structure of a frequency conversion module provided in an embodiment of the present invention;

[0059] Figure 7 A second structural schematic diagram of a frequency conversion module provided in an embodiment of the present invention;

[0060] Figure 8 The third structural diagram of the frequency conversion module provided by the embodiment of the present invention is

[0061] Fig. 9 A fourth structural schematic diagram of a frequency conversion module provided in an embodiment of the present invention;

[0062] Fig.10 A fifth structural schematic diagram of a frequency conversion module provided in an embodiment of the present invention;

[0063] Fig.11 A sixth structural schematic diagram of a frequency conversion module provided in an embodiment of the present invention;

[0064] Fig.12 A schematic diagram of the structure of a second resonant network provided in an embodiment of the present invention;

[0065] Fig.13 A seventh structural schematic diagram of a frequency conversion module provided in an embodiment of the present invention;

[0066] Fig.14 The eighth structural diagram of the frequency conversion module provided by the embodiment of the present invention;

[0067] Fig.15 A schematic diagram of the structure of a sensor module provided in an embodiment of the present invention;

[0068] Fig.16 A schematic diagram of the structure of an auxiliary energy module provided by an embodiment of the present invention;

[0069] Fig.17 A schematic diagram of the structure of a wireless tag system provided by an embodiment of the present invention.

[0070] Explanation of the reference numerals: 11-antenna module; 111-first antenna; 112-power distribution module; 113-second antenna; 114-four-port directional coupler; 12-tag information module; 121-energy conversion circuit; 122-energy management circuit; 123-control circuit; 13-frequency conversion module; 130-switching device; 131-first modulation element; 132-first resonant network; 133-second resonant network; 1331-piezoelectric resonator; 134-voltage-controlled oscillator; 135-mixer; 136-Schottky diode; 137-second modulation element; 138-first filter; 139-second filter; 14-sensing module; 15-auxiliary energy module; 100 wireless tag device; 200-transceiver. DETAILED DESCRIPTION

[0071] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0072] Figure 1 The structure of a wireless tag device according to an embodiment of the present invention is shown, which includes an antenna module 11, a tag information module 12 and a frequency conversion module 13. The antenna module 11, the tag information module 12 and the frequency conversion module 13 are electrically connected in pairs. The antenna module 11 is configured to receive a first frequency ( f in ) and sending a first microwave signal with a second frequency ( f out ); the tag information module 12 is configured to send a tag signal to the frequency conversion module 13 under the drive of the first microwave signal; the frequency conversion module 13 is configured to generate a second microwave signal carrying tag information according to the first microwave signal and the tag signal, or is configured to generate a second microwave signal carrying tag information according to the tag signal. The aforementioned tag signal is a signal including tag information.

[0073] In practical applications, the aforementioned tag information includes identity information and / or sensor information.

[0074] When working, the remote transceiver sends a continuous wave excitation signal with a first frequency, that is, a first microwave signal, and the antenna module 11 receives the first microwave signal in the free space, and transmits the first microwave signal to the tag information module 12 and the frequency conversion module 13 respectively; for the tag information module 12, after receiving the first microwave signal, it converts the first microwave signal into direct current, and the direct current provides power for the power-consuming devices (such as digital coding circuit, storage circuit, control circuit, sensor circuit, etc.) inside the tag information module 12. The tag information module 12 outputs the tag signal to the frequency conversion module 13 under the power supply of the first microwave signal. For the frequency conversion module 13, according to the different architectures of the specific frequency conversion module, it can be divided into generating a second microwave signal carrying tag information only according to the tag signal, and generating a second microwave signal carrying tag information according to the first microwave signal and the tag signal. Afterwards, the second microwave signal is coupled and output into the free space through the antenna module 11, and the remote transceiver receives the second microwave signal and parses it to obtain the corresponding tag information.

[0075] In the above process, due to the use of a heterogeneous frequency communication system, on the one hand, the problems of short communication distance and serious co-frequency interference existing in the co-frequency communication system can be overcome; on the other hand, by loading the tag information into the heterogeneous frequency return signal, accurate identification and positioning of numerous wireless tag devices within the communication coverage area of ​​the transceiver device can be achieved, thus overcoming the problems of limited number of wireless tag devices carried by the same transceiver device and complex debugging under the heterogeneous frequency communication system in the prior art.

[0076] It should be noted that the antenna module 11 can be any antenna object that can achieve efficient transmission and reception of heterodyne communications. Several implementations of the antenna module 11 are exemplarily shown below.

[0077] Figure 2 The structure of the antenna module 11 of an embodiment of the present invention is shown, which includes a first antenna 111 and a power distribution module 112. The first antenna 111 is electrically connected to the power distribution module 112. The power distribution module 112 includes an input port and at least two output ports. The input port is electrically connected to the first antenna 111, and the output port is electrically connected to the tag information module 12 and the frequency conversion module 13. Through the above configuration, on the one hand, the power distribution module 112 can divide the first microwave signal coupled from the first antenna 111 into at least two parts, one part is input to the tag information module 12, and the other part is input to the frequency conversion module 13; on the other hand, the power distribution module 112 transmits the second microwave signal output by the frequency conversion module 13 to the first antenna 111.

[0078] The power distribution module 112 may be any object capable of implementing power distribution, including but not limited to a power divider and a coupler.

[0079] Figure 3 The structure of the antenna module 11 of an embodiment of the present invention is shown, which includes a second antenna 113 in addition to a first antenna 111. The first antenna 111 and the second antenna 113 are independent antennas. The first antenna 111 is electrically connected to the tag information module 12, and the second antenna 113 is electrically connected to the frequency conversion module 13. Through the above configuration, the use of two independent antennas has the characteristics of small signal transmission path loss, flexible installation, high coupling efficiency, etc.

[0080] Figure 4 The structure of an antenna module 11 according to an embodiment of the present invention is shown, which includes a first antenna 111, a second antenna 113 and a four-port directional coupler 114. The four-port directional coupler 114 includes a first coupler port T11 to a fourth coupler port T14. The first coupler port T11 is electrically connected to the first antenna 111, the second coupler port T12 is electrically connected to the tag information module 12, the third coupler port T11 is electrically connected to the second antenna 113, and the fourth coupler port T14 is electrically connected to the frequency conversion module 13.

[0081] On the one hand, compared with Figure 3 Only one first microwave signal coupled by one antenna enters the tag information module 12 or the frequency conversion module 13. Through the above configuration, the first microwave signal coupled from two antennas will enter the tag information module 12 or the frequency conversion module 13, which can increase the power of the first microwave signal entering the tag information module 12 or the frequency conversion module 13. On the other hand, the second microwave signal output from the frequency conversion module 13 can also be coupled and output via the first antenna 111 and the second antenna 113. Compared with the method of coupling and outputting from a single antenna in FIG. 3, there is no degradation in the coupling and output efficiency of the second microwave signal.

[0082] The tag information module 12 is configured to send a tag signal to the frequency conversion module 13 under the drive of the first microwave signal, that is, the tag information module 12 obtains the electric energy required for the operation of its internal circuit through the first microwave signal.

[0083] Figure 5The structure of the tag information module 12 of the first embodiment of the present scheme is shown, which includes an energy conversion circuit 121, an energy management circuit 122 and a control circuit 123. The energy conversion circuit 121 is electrically connected to the antenna module 11 and the energy management circuit 122, and the control circuit 123 is electrically connected to the energy management circuit 122 and the frequency conversion module 13. The energy conversion circuit 121 is configured to convert the first microwave signal from the antenna module 11 into direct current. The energy management circuit 122 is configured to store direct current, control the stored direct current power, and reasonably distribute the direct current power. The control circuit 123 is configured to store tag information internally and work according to a pre-agreed communication strategy. The aforementioned communication strategy is uniformly agreed upon by the transceiver and each wireless tag device, and the agreed content includes at least that only one wireless tag device returns the second microwave signal carrying the tag information at the same time.

[0084] It should be noted that the frequency conversion module 13 is configured to generate a second microwave signal carrying tag information according to the tag signal. In principle, the frequency conversion module 13 can be any frequency conversion object that can generate the second microwave signal. The generation of the second microwave signal does not necessarily require the participation of the first microwave signal. Several embodiments are exemplarily shown below.

[0085] Figure 6 The structure of a frequency conversion module 13 that does not require the first microwave signal to participate in generating the second microwave signal is exemplarily shown. The frequency conversion module 13 includes a voltage-controlled oscillator 134, and the voltage-controlled oscillator 134 is electrically connected to the antenna module 11 and the tag information module 12. A voltage-controlled oscillator is an oscillation circuit whose output frequency corresponds to an input control voltage. When the working state of the voltage-controlled oscillator or the component parameters of the oscillation circuit are controlled by the input control voltage, a voltage-controlled oscillator can be formed.

[0086] In some embodiments, the tag information module 12 outputs a voltage-type tag signal, and the voltage-controlled oscillator 134 responds to the voltage-type tag signal to output a second microwave signal in response to the tag signal.

[0087] In some embodiments, the tag information module 12 outputs a current-type tag signal, and the frequency conversion module 13 also includes a current-voltage conversion circuit, which converts the current-type tag signal into a voltage-type tag signal. The voltage-controlled oscillator 134 responds to the voltage-type tag signal, thereby outputting a second microwave signal in response to the tag signal.

[0088] In some embodiments, the tag signal is an on-off keying signal or an amplitude shift keying signal, and the frequency conversion module 13 responds to the tag signal and outputs a third frequency signal corresponding to a low level of the tag signal and a fourth frequency signal corresponding to a high level of the tag signal.

[0089] In some embodiments, one of the third frequency signal and the fourth frequency signal has a first frequency, and the other has a second frequency. Exemplarily, the third frequency signal has a first frequency, and the fourth frequency signal has a second frequency.

[0090] In some embodiments, the first frequency and the second frequency are both carrier frequencies or center frequencies.

[0091] In some embodiments, the first frequency is 950 MHz, the second frequency is 915 MHz, the third frequency signal range is 940 MHz to 960 MHz, and the fourth frequency signal range is 913 MHz to 917 MHz.

[0092] Through the above-mentioned arrangement, the change of the second microwave signal output by the voltage-controlled oscillator 134 indirectly reflects the tag information, that is, the second microwave signal carries the tag information, forming a frequency-shift keyed second microwave signal carrying the tag information. Therefore, the return signal received by the transceiver device from each wireless tag device is a variable frequency signal with the tag information, which solves the outstanding problems of the prior art such as the limited number of tags carried and the weak anti-interference ability.

[0093] Figure 7 The present invention shows a construction method of another frequency conversion module 13 that does not require the first microwave signal to participate in generating the second microwave signal. In addition to the voltage-controlled oscillator 134, it also includes a first filter 138 and a second filter 139. The first filter 138 and the second filter 139 are both electrically connected to the voltage-controlled oscillator 134. The voltage-controlled oscillator 134 is also electrically connected to the control circuit 123 in the tag information module 12. The first filter 138 is also electrically connected to the energy conversion circuit 121 in the tag information module 12. The second filter 139 is also electrically connected to the antenna module 11. Among them, the first filter 138 is configured to pass a signal with a first frequency, and the second filter 139 is configured to pass a signal with a second frequency. Through the above-mentioned configuration, the signal with a first frequency generated by the voltage-controlled oscillator can be transmitted to the tag information module 12 and converted into direct current, which can increase the storage capacity of direct current, thereby extending the wireless communication distance.

[0094] Figure 8The structure of another frequency conversion module 13 of the present invention that does not require the first microwave signal to participate in generating the second microwave signal is shown. In addition to the voltage-controlled oscillator 134, it also includes a switch device 130. The voltage-controlled oscillator 134 is electrically connected to the energy management circuit 122 in the tag information module 12. The switch device 130 is electrically connected to the voltage-controlled oscillator 134, the antenna module 11, and the control circuit 123 in the tag information module 12. The energy management circuit 122 provides a constant working voltage for the voltage-controlled oscillator 134, so that the voltage-controlled oscillator 134 outputs a signal with a second frequency. The tag signal output by the control circuit 123 causes the switch device 130 to perform amplitude modulation on the signal with a second frequency output by the voltage-controlled oscillator 134, thereby forming a second microwave signal carrying tag information and in amplitude shift keying.

[0095] The switching device 130 may be any suitable low power consumption device, such as a field effect transistor.

[0096] Fig. 9 The present invention shows a construction method of a frequency conversion module 13 that requires a first microwave signal to participate in generating a second microwave signal. On the basis of the above-mentioned embodiment, the frequency conversion module 13 also includes a mixer 135, and the mixer 135 is electrically connected to the antenna module 11 and the voltage-controlled oscillator 134, respectively. The third frequency signal in response to the low level of the tag signal and the fourth frequency signal in response to the high level of the tag signal output by the voltage-controlled oscillator 134 are mixed with the first microwave signal from the antenna module 11 in the mixer 135, respectively, to obtain a sixth frequency signal and a seventh frequency signal, respectively. One of the sixth frequency signal and the seventh frequency signal is a second microwave signal having a second frequency. Through the above-mentioned configuration, interference-free analysis of the second microwave signal carrying tag information can be achieved.

[0097] In some embodiments, the first frequency is 950 MHz, the second frequency is 915 MHz, the third frequency signal range is 1 MHz to 3 MHz, the fourth frequency signal range is 34 MHz to 36 MHz, the sixth frequency signal range is 947 MHz to 949 MHz, and the seventh frequency signal range is 914 MHz to 916 MHz.

[0098] Fig.10The present invention shows a construction mode of a frequency conversion module 13 that requires a first microwave signal to participate in generating a second microwave signal. On the basis of the above-mentioned embodiment, the frequency conversion module 13 also includes a first filter 138 and a second filter 139. The first filter 138 and the second filter 139 are both electrically connected to the voltage-controlled oscillator 134. The voltage-controlled oscillator 134 is also electrically connected to the control circuit 123 in the tag information module 12. The first filter 138 is also electrically connected to the energy conversion circuit 121 in the tag information module 12. The second filter 139 is also electrically connected to the mixer 135. Among them, the first filter 138 is configured to pass a signal with a first frequency, and the second filter 139 is configured to pass a signal with an eighth frequency, and the eighth frequency is the sum frequency or difference frequency of the second frequency and the first frequency. Through the above-mentioned configuration, the signal with the first frequency generated by the voltage-controlled oscillator can be transmitted to the tag information module 12 and converted into direct current, which can increase the storage capacity of direct current, thereby extending the wireless communication distance.

[0099] Fig.11 The present invention shows a construction mode of a frequency conversion module 13 that requires a first microwave signal to participate in generating a second microwave signal. In this embodiment, the frequency conversion module 13 includes a first modulation element 131, a first resonant network 132, and a second resonant network 133. The first modulation element 131 includes three ports, namely a first modulation port T21, a second modulation port T22, and a third modulation port T23, wherein the first modulation port T21 is used to input a first frequency ( f in ) of the first microwave signal, and outputting a second microwave signal having a frequency ( f out )’s second microwave signal.

[0100] In this circuit, the generation of the second frequency does not depend on whether there is a tag signal. When there is no tag signal and only the first microwave signal is input, the first modulation element 131 establishes a channel for the first microwave signal to perform passive transmission between the first modulation port T21 and the second modulation port T22, and between the second modulation port T22 and the third modulation port T23, and transmits the first frequency ( f in ) and the second resonant frequency ( f r2 ) is mixed with an oscillating signal having a second frequency ( f out), a mixed signal without tag information, and then outputs the mixed signal from the first modulation port T21. When a tag signal is connected, the tag signal will be loaded onto the mixed signal to form a second microwave signal carrying tag information. Through the above settings, the tag signal generated by the tag information module 12 is modulated on the mixed signal of the second frequency, thereby realizing passive wireless digital coding transmission.

[0101] The tag signal output by the tag information module 12 is connected to the frequency conversion module 13 at multiple locations, including but not limited to Fig.11 The first access position P1-12, the second access position P2-12, and the third access position P3-12. The access of the tag signal at the first access position P1-12, that is, the second resonant network 133 is electrically connected to the tag information module 12; the access of the tag signal at the first access position P2-12, that is, the first resonant network 132 is electrically connected to the tag information module 12; the access of the tag signal at the third access position P3-12, that is, the first modulation port T21 of the first modulation element 131 is electrically connected to the tag information module 12.

[0102] In some embodiments, the first modulation element 131 may be a transistor having a heterojunction, for example, a heterojunction bipolar transistor, a field effect transistor (FET), etc. The FET may be a metal oxide semiconductor field effect transistor (MOSFET), a two-dimensional electron gas transistor, or a high electron mobility transistor (HEMT).

[0103] In some embodiments, the first modulation element 131 is a transistor with a two-dimensional electron gas, and the drain (D) of the transistor serves as the first modulation port T21, the source (S) serves as the second modulation port T22, and the gate (G) serves as the third modulation port T23. The piezoelectric resonator 1331 is electrically connected to the third modulation port T23 of the first modulation element 131.

[0104] Fig.12 The specific access method of the second resonant network 133 and the tag information module 12 in an embodiment of the present invention is shown. The second resonant network 133 includes a piezoelectric resonator 1331 and a capacitor 1332 electrically connected to the piezoelectric resonator 1331. The other end of the capacitor 1332 is grounded. The position between the piezoelectric resonator 1331 and the capacitor 1332 is electrically connected to the tag information module 12.

[0105] In some embodiments, Fig.12 The capacitor 1332 in the tag information module 12 can be removed. In this case, the piezoelectric resonator 1331 is directly connected to the tag information module 12.

[0106] Fig.13The structure of the frequency conversion module 13 of the present invention that requires the first microwave signal to participate in generating the second microwave signal is shown. In this embodiment, the frequency conversion module 13 includes a Schottky diode 136 and a second modulation element 137. The anode of the Schottky diode 136 is electrically connected to the antenna module 11, and the cathode of the Schottky diode 136 is electrically connected to the antenna module 11 and the second modulation element 137. The second modulation element 137 is also electrically connected to the tag information module 12. The first microwave signal output by the antenna module 11 enters from the anode of the Schottky diode 136, and outputs a frequency-doubled signal of the second frequency from the cathode. When the tag signal output by the tag information module 12 is loaded onto the above-mentioned frequency-doubled signal, the frequency conversion module 13 outputs a second microwave signal carrying the tag information and having a frequency of the second frequency.

[0107] In some embodiments, the first frequency is 433 MHz and the second frequency is 866 MHz.

[0108] Fig.14 The present invention shows a construction method of a frequency conversion module 13 that requires a first microwave signal to participate in generating a second microwave signal. On the basis of the above-mentioned embodiment, the frequency conversion module 13 also includes a first filter 138 and a second filter 139. The first filter 138 is electrically connected to the antenna module 11 and the anode of the Schottky diode 136, respectively, and the second filter 139 is electrically connected to the antenna module 11 and the cathode of the Schottky diode 136, respectively. Among them, the first filter 138 is configured to pass a signal with a first frequency, and the second filter 139 is configured to pass a signal with a second frequency. In this way, the signal transmission path of the first frequency and the second frequency can be constrained, and the generation of a higher-order mixing signal in the Schottky diode 136 can be avoided, which reduces the difficulty of the wireless tag device to analyze the signal of the transceiver device and improves the anti-interference ability of the entire wireless tag system.

[0109] In some embodiments, the wireless tag device further includes a sensor module 14, which is configured to sense a physical quantity of the object to be measured, including but not limited to temperature, pressure, vibration, humidity, etc.

[0110] In some embodiments, Fig.15 As shown, the sensor module 14 is an active sensor module, and the sensor module 14 is electrically connected to the control circuit 123 and the energy management circuit 122 in the tag information module 12, respectively. The energy management circuit 122 provides power to the sensor module 14, and the control circuit 123 stores the sensing amount of the sensor module 14 and encodes it into the tag signal. Thus, the tag signal carries identity information and sensor information. Accordingly, the wireless tag device is a wireless sensor tag device.

[0111] In some embodiments, the sensor module 14 is a passive sensor module, and the sensor module 14 is electrically connected to the control circuit 123 in the tag information module 12. The control circuit 123 stores the sensing amount of the sensor module 14 and encodes it into the tag signal. Thus, the tag signal carries identity information and sensor information. Accordingly, the wireless tag device is a wireless sensor tag device.

[0112] For some application scenarios, a longer wireless communication distance is required. In response to the above needs, the wireless communication distance can be further extended by adding an auxiliary energy module 15 to the wireless tag device. The auxiliary energy module 15 can be any suitable energy supply module, for example, an energy supply module based on a microwave energy collection method, an energy supply module based on an environmental energy collection method, and an energy supply module based on a battery. Among them, the microwave object based on the microwave energy collection method can be the first microwave signal sent by the transceiver; the environmental energy collection method can be based on microwave signals in the environment, including but not limited to base station microwave signals and mobile device microwave signals; the environmental energy collection method can be based on light signals, temperature signals, heat signals, pressure signals, vibration signals, etc. in the environment.

[0113] In some embodiments, Fig.16 The diagram shows the connection between the auxiliary energy module 15 and the wireless tag device in any of the aforementioned embodiments. Specifically, the auxiliary energy module 15 is electrically connected to the energy management circuit 122 of the tag information module 12 , and the energy management circuit 122 stores and manages the electrical energy provided by the auxiliary energy module 15 .

[0114] In some embodiments, Fig.16 The figure shows the connection method between the auxiliary energy module 15 and the wireless tag device in any of the aforementioned embodiments. Specifically, the auxiliary energy module 15 is electrically connected to the energy management circuit 122 of the tag information module 12 and the sensor module 14, respectively. The auxiliary energy module 15 provides electrical energy to the tag information module 12 and the sensor module 14, respectively, and the energy management circuit 122 stores and manages the electrical energy provided by the auxiliary energy module 15.

[0115] The present invention also provides an embodiment of a wireless tag system, such as Fig.17 As shown, it includes a transceiver 200 and a wireless tag device 100 disclosed in any of the above embodiments; the transceiver 200 is used to send a first frequency ( f in ) microwave signal, and receiving the second frequency ( f out) a frequency conversion signal, wherein the second frequency is different from the first frequency. The second frequency conversion signal carries identity information, sensor information, or identity information and sensor information.

[0116] It should be noted that the specific implementation of the wireless tag system of the present application refers to the above-mentioned wireless tag device embodiment, which will not be repeated here.

[0117] The present invention also provides an embodiment of a wireless communication method, which specifically includes the following steps:

[0118] S1, the transceiver sends a first microwave signal with a first frequency;

[0119] S2, the wireless tag device receives a first microwave signal having a first frequency, and returns a second microwave signal having a second frequency and carrying tag information to the transceiver device;

[0120] S3, the transceiver receives and analyzes the second microwave signal to obtain tag information.

[0121] In some embodiments, in step S1 , the first microwave signal is a continuous wave excitation signal.

[0122] In some embodiments, in step S2, the antenna module 11 receives a first microwave signal in free space, and transmits the first microwave signal to the tag information module 12 and the frequency conversion module 13 respectively; the tag information module 12 transmits the tag signal to the frequency conversion module 13 under the power of the first microwave signal; the frequency conversion module 13 outputs a second microwave signal having a second frequency and carrying the tag information.

[0123] In some embodiments, in step S2, the tag information module 12 converts the first microwave signal into direct current after receiving the first microwave signal.

[0124] In some implementations, in step S2, the second microwave signal output by the frequency conversion module 13 is obtained with or without the first microwave signal.

[0125] In some embodiments, in step S2 , the frequency conversion module 13 generates a second microwave signal having a second frequency and carrying the tag information according to the tag signal output by the tag information module 12 .

[0126] In some embodiments, in step S2, the frequency conversion module 13 obtains a second microwave signal having a second frequency and carrying the tag information by mixing the tag signal output by the tag information module 12 with the first microwave signal.

[0127] In some embodiments, in step S2, the frequency conversion module 13 first obtains a frequency conversion signal with a second frequency according to the first microwave signal, and after loading the tag signal, outputs a second microwave signal with the second frequency and carrying the tag information.

[0128] It should be noted that the specific implementation of the wireless communication method of the present application is basically the same as the above-mentioned wireless tag system embodiment, and will not be repeated here.

[0129] The embodiment of the present invention proposes a wireless tag device, system and communication method, which utilizes a tag information module to send a tag signal to a frequency conversion module under the drive of a first microwave signal with a first frequency in free space, and the tag signal is used to drive the frequency conversion module to generate a second microwave signal carrying tag information and with a second frequency alone or in combination with the first microwave signal, and utilizes an antenna module to realize the reception of the first microwave signal in free space and the transmission of the second microwave signal in free space. In this way, based on the nature of transceiver heterogeneous frequency communication, on the one hand, the problems of short communication distance and serious co-frequency interference existing in the transceiver co-frequency communication system can be overcome; on the other hand, by loading the tag information into the heterogeneous frequency return signal, the accurate identification and positioning of numerous wireless tag devices within the communication coverage area of ​​the transceiver device can be realized, which overcomes the problems of limited number of wireless tag devices carried by the same transceiver device under the transceiver heterogeneous frequency communication system and complex debugging in the prior art.

[0130] In the description of the embodiments of the present invention, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "center", "top", "bottom", "top", "bottom", "inside", "outside", "inner side", "outer side" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention. Among them, "inside" refers to an internal or enclosed area or space. "Periphery" refers to the area surrounding a specific component or a specific area.

[0131] In the description of the embodiments of the present invention, the terms "first", "second", "third", and "fourth" are used for descriptive purposes only and are not to be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first", "second", "third", and "fourth" may explicitly or implicitly include one or more of the features. In the description of the present invention, unless otherwise specified, "multiple" means two or more.

[0132] In the description of the embodiments of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "install", "connect", "connect", and "assemble" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0133] In the description of the embodiments of the present invention, specific features, structures, materials or characteristics may be combined in a suitable manner in any one or more embodiments or examples.

[0134] In the description of the embodiments of the present invention, it should be understood that "-" and "~" represent a range between two values, and the range includes the endpoints. For example: "AB" represents a range greater than or equal to A, and less than or equal to B. "A~B" represents a range greater than or equal to A, and less than or equal to B.

[0135] In the description of the embodiments of the present invention, the term "and / or" herein is merely a description of the association relationship of associated objects, indicating that three relationships may exist. For example, A and / or B may represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " herein generally indicates that the associated objects before and after are in an "or" relationship.

[0136] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A wireless tag device, characterized in that: include: Antenna module, tag information module and frequency conversion module; The antenna module, the tag information module and the frequency conversion module are electrically connected in pairs; The antenna module is configured to receive a first microwave signal having a first frequency in free space, and to send a second microwave signal having a second frequency into the free space; wherein the second microwave signal carries tag information; The tag information module is configured to send a tag signal to the frequency conversion module under the drive of the first microwave signal; The frequency conversion module is configured to generate a second microwave signal carrying tag information according to the first microwave signal and the tag signal, or is configured to generate a second microwave signal carrying tag information according to the tag signal.

2. The wireless tag device according to claim 1, characterized in that: The antenna module comprises: a first antenna and a power distribution module; the first antenna is electrically connected to the power distribution module; the power distribution module comprises an input port and two output ports, the input port is electrically connected to the first antenna, and the two output ports are electrically connected to the tag information module and the frequency conversion module respectively; Alternatively, it comprises: a first antenna and a second antenna; the first antenna is electrically connected to the tag information module, and the second antenna is electrically connected to the frequency conversion module; Alternatively, it includes: a first antenna, a second antenna and a four-port directional coupler, the four-port directional coupler having a first coupler port, a second coupler port, a third coupler port and a fourth coupler port; the first coupler port is electrically connected to the first antenna, the second coupler port is electrically connected to the tag information module, the third coupler port is electrically connected to the second antenna, and the fourth coupler port is electrically connected to the frequency conversion module.

3. The wireless tag device according to claim 1, characterized in that: The tag information module specifically includes: an energy conversion circuit, an energy management circuit and a control circuit; The energy conversion circuit is electrically connected to the antenna module and the energy management circuit respectively, and the control circuit is electrically connected to the energy management circuit and the frequency conversion module respectively; The energy conversion circuit is configured to convert the first microwave signal from the antenna module into direct current; The energy management circuit is configured to store and control the direct current, and drive the control circuit to generate a tag signal; The control circuit is configured to generate and output a tag signal corresponding to the tag information according to the internally stored tag information.

4. The wireless tag device according to claim 1, characterized in that: Also includes a sensor module; The sensing module is electrically connected to the control circuit in the tag information module; the sensing module is configured to sense the physical quantity of the object to be measured, and the control circuit is configured to store the physical quantity sensed by the sensing module and encode the stored physical quantity into the tag signal; Alternatively, the sensing module is electrically connected to the control circuit and the energy management circuit in the tag information module respectively; the sensing module is configured to sense the physical quantity of the object to be measured; The energy management circuit is configured to provide electric energy to the sensing module, and the control circuit is configured to store the physical quantity sensed by the sensing module and encode the stored physical quantity into a tag signal.

5. The wireless tag device according to claim 4, characterized in that: Also included is an auxiliary energy module; The auxiliary energy module is electrically connected to the tag information module, and the auxiliary energy module is configured to provide electrical energy to the tag information module; The tag information module is configured to store and manage the electric energy provided by the auxiliary energy module; Alternatively, the auxiliary energy module is electrically connected to the energy management circuit of the sensor module and the tag information module; the auxiliary energy module is configured to provide electrical energy to the sensor module and the energy management circuit, and the energy management circuit is configured to store and manage the electrical energy provided by the auxiliary energy module.

6. The wireless tag device according to any one of claims 1 to 5, characterized in that: The frequency conversion module comprises: a voltage-controlled oscillator; the voltage-controlled oscillator is electrically connected to the antenna module and the tag information module respectively; the tag information module provides an input control voltage for the voltage-controlled oscillator, and the voltage-controlled oscillator is configured to generate a signal having an output frequency corresponding to the input control voltage according to the input control voltage; Alternatively, it includes: a voltage-controlled oscillator, a first filter and a second filter; the first filter and the second filter are electrically connected to the voltage-controlled oscillator respectively, the voltage-controlled oscillator is also electrically connected to the control circuit in the tag information module, the first filter is also electrically connected to the energy conversion circuit in the tag information module, and the second filter is also electrically connected to the antenna module; the tag information module provides an input control voltage for the voltage-controlled oscillator, and the voltage-controlled oscillator is configured to generate a signal with an output frequency corresponding to the input control voltage according to the input control voltage; the first filter is configured to pass a signal with a first frequency, and the second filter is configured to pass a signal with a second frequency.

7. The wireless tag device according to claim 6, characterized in that: The input control voltage is configured as a voltage type tag signal output by the tag information module; Alternatively, the input control voltage is configured as a voltage-type tag signal after the current-type tag signal output by the tag information module is converted by a current-to-voltage conversion circuit; Alternatively, the input control voltage is configured as an on-off keying signal or an amplitude shift keying signal output by a tag information module, and the frequency conversion module is configured to generate a third frequency signal corresponding to a low level and a fourth frequency signal corresponding to a high level in response to the on-off keying signal or the amplitude shift keying signal; wherein one of the third frequency signal and the fourth frequency signal has a first frequency, and the other has a second frequency.

8. The wireless tag device according to any one of claims 1 to 5, characterized in that: The frequency conversion module includes: a voltage-controlled oscillator and a switching device, wherein the voltage-controlled oscillator is electrically connected to the switching device and the energy management circuit in the tag information module respectively, and the switching device is also electrically connected to the antenna module and the control circuit in the tag information module respectively; the energy management circuit is configured to provide a constant input control voltage to the voltage-controlled oscillator, and the voltage-controlled oscillator is configured to output a signal with a second frequency according to the input control voltage; the switching device is configured to perform amplitude modulation on the signal with the second frequency according to the tag signal output by the control circuit to generate a second microwave signal carrying tag information.

9. The wireless tag device according to any one of claims 1 to 5, characterized in that: The frequency conversion module includes: a mixer and a voltage-controlled oscillator; the mixer is electrically connected to the antenna module and the voltage-controlled oscillator respectively; the third frequency signal corresponding to the low level and the fourth frequency signal corresponding to the high level in the on-off keying signal or the amplitude shift keying signal output by the voltage-controlled oscillator are respectively mixed with the first microwave signal from the antenna module in the mixer to obtain a sixth frequency signal and a seventh frequency signal respectively; wherein one of the sixth frequency signal and the seventh frequency signal has a second frequency; Alternatively, it includes: a mixer, a first filter, a second filter and a voltage-controlled oscillator; the mixer is electrically connected to the antenna module and the second filter respectively; the first filter and the second filter are electrically connected to the voltage-controlled oscillator respectively, the voltage-controlled oscillator is also electrically connected to the control circuit in the tag information module, and the first filter is also electrically connected to the energy conversion circuit in the tag information module; the voltage-controlled oscillator outputs a third frequency signal corresponding to a low level and a fourth frequency signal corresponding to a high level in an on-off keying signal or an amplitude shift keying signal, and the third frequency signal or the fourth frequency signal is mixed with the first microwave signal from the antenna module in the mixer after passing through the second filter to obtain an eighth frequency signal; wherein the eighth frequency signal has a sum frequency or a difference frequency of the second frequency and the first frequency.

10. The wireless tag device according to any one of claims 1 to 5, characterized in that: The frequency conversion module specifically includes: a first modulation element, a first resonant network and a second resonant network; The first modulation element has a first modulation port, a second modulation port and a third modulation port, the first modulation port is electrically connected to the antenna module, the second modulation port is electrically connected to the first resonance network, and the third modulation port is electrically connected to the second resonance network; The first modulation element is configured to mix the first microwave signal with the first frequency of the first modulation port with the oscillation signal with the second resonant frequency fed into the second resonant network to obtain a mixed signal with the second frequency and without carrying label information; The label information module is electrically connected to the first modulation port, the first resonant network or the second resonant network; The first modulation element is further configured to add the tag signal of the tag information module to the mixed signal having the second frequency and not carrying the tag information to form a second microwave signal carrying the tag information.

11. The wireless tag device according to claim 10, characterized in that: The first modulation element is configured as a transistor having a heterojunction.

12. The wireless tag device according to claim 10, characterized in that: The second resonant network includes: a piezoelectric resonator; One end of the piezoelectric resonator is electrically connected to the first modulation element, and the other end is grounded or electrically connected to the tag information module through an electrically connected capacitor.

13. The wireless tag device according to any one of claims 1 to 5, characterized in that: The frequency conversion module includes: a Schottky diode and a second modulation element; the anode of the Schottky diode is electrically connected to the antenna module, the cathode is electrically connected to the antenna module and the second modulation element, and the second modulation element is also electrically connected to the tag information module; Alternatively, the device comprises: a Schottky diode, a second modulation element, a first filter, and a second filter; the first filter is electrically connected to the antenna module and the anode of the Schottky diode, respectively, and the second filter is electrically connected to the antenna module and the cathode of the Schottky diode, respectively; the first filter is configured to pass a signal having a first frequency, and the second filter is configured to pass a signal having a second frequency; The Schottky diode is configured to convert a first microwave signal having a first frequency into a frequency-doubled signal having an output frequency of a second frequency, and when the frequency-doubled signal is loaded with a tag signal of a tag information module transmitted by a second modulation element, generates a second microwave signal carrying tag information and having a second frequency.

14. A wireless tag system, characterized in that: include: A transceiver and a wireless tag device as claimed in any one of claims 1 to 13; The transceiver is configured to transmit a first microwave signal having a first frequency to the wireless tag device, and receive a second microwave signal having a second frequency returned by the wireless tag device, wherein the second frequency is different from the first frequency; The second microwave signal with the second frequency carries label information.

15. A wireless communication method, used in the wireless tag system according to claim 14, characterized in that: include: S1: The transceiver sends a first microwave signal having a first frequency; S2: The wireless tag device receives a first microwave signal having a first frequency, and returns a second microwave signal having a second frequency and carrying tag information to the transceiver device; S3: The transceiver receives and analyzes the second microwave signal to obtain tag information.

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