CN112085137A - Implantable RFID tag device for detecting temperature - Google Patents

Abstract

The present application relates to an implantable RFID tag device for detecting temperature, comprising: a dielectric substrate having a high dielectric constant between and a low loss angle; the antenna is a microstrip antenna printed on the dielectric substrate and contacts the detection entity when being implanted so that the detection entity acts as a part of the antenna oscillator; a temperature sensor; an RFID tag chip configured to acquire temperature data from the temperature sensor and transmit the temperature data and an ID of the RFID tag through an antenna; a power supply circuit configured to supply power to the temperature sensor and the RFID tag chip, including: a virtual battery including a first electrode and a second electrode disposed on the dielectric substrate, configured to store a power signal obtained at the antenna; a charge pump circuit, located between the antenna and the virtual battery, configured to boost an electromotive force of a power signal obtained at the antenna to charge the virtual battery. Accurate temperature detection through wireless energy supply is realized, and the volume miniaturization is easy to implant.

Description

An implantable RFID tag device for detecting temperature

technical field

The present application relates to the field of implantable devices, and in particular, to an implantable RFID tag device for detecting temperature.

Background technique

Animal health is judged by measuring body temperature. There are mercury thermometers and electronic thermometers on the market. In the related art, through the wearable electronic ear tag, using Bluetooth technology, temperature sensor and button battery, the skin contact temperature is measured. It relies on the contact between the temperature sensor and the ear skin to obtain the skin temperature, which does not represent the real temperature due to the influence of the environment. In addition, the shedding rate of wearable electronic ear tags is as high as 60%.

The inventors of the present application found that the implantable device can detect the body temperature and is not easy to fall off. However, the electronic thermometer in the related art is relatively bulky and difficult to implant. Moreover, because some electronic components are toxic and harmful, they cannot or are not suitable for long-term use in animals. In addition, implantable devices have many problems in power supply and communication performance.

SUMMARY OF THE INVENTION

In order to solve the above technical problems or at least partially solve the above technical problems, the present application provides an implantable RFID tag device for detecting temperature.

An implantable RFID tag device for detecting temperature provided by the present application includes: a dielectric substrate, the dielectric constant of the dielectric substrate is between 100 and 300, and the loss angle is less than or equal to 0.05%; an antenna, the antenna is printed A microstrip antenna on a dielectric substrate, the antenna being arranged to contact the detection entity when implanted so that the detection entity acts as part of the antenna element; a temperature sensor; an RFID tag chip, coupled to the antenna and the temperature sensor, arranged to receive temperature from the The sensor acquires temperature data, and sends the temperature data and the ID of the RFID tag through the antenna; and a power supply circuit, coupled with the antenna, is configured to provide power to the temperature sensor and the RFID tag chip, and the power supply circuit includes: a virtual battery, including a power supply circuit arranged on the medium substrate On the first electrode and the second electrode, the virtual battery is set to store the power signal obtained at the antenna; the charge pump circuit, located between the antenna and the virtual battery, is set to boost the electromotive force of the power signal obtained at the antenna to send Virtual battery charging.

In some embodiments, a temperature sensor, configured to be implanted in the detection entity at least partially contacts the detection entity, to detect the temperature of the detection entity.

In some embodiments, the implantable RFID tag device further includes: a corrosion-resistant coating disposed on the antenna; or, the antenna is a corrosion-resistant metal.

In some embodiments, the antenna is a silver-plated layer disposed on the dielectric substrate through a silver-plating process.

In some embodiments, the power supply circuit further includes: an energy storage valve configured to supply power to the virtual battery when its electromotive force reaches the valve; and a voltage regulator circuit coupled to the energy storage valve.

In some embodiments, an insulating cover layer is further included, at least disposed on the power supply circuit and the RFID tag chip, so as to insulate the power supply circuit and the RFID tag chip from the detection entity when implanted in the detection entity.

In certain embodiments, the insulating cover layer is a biocompatible material.

In some embodiments, the operating frequency range of the antenna is 200Mhz to 1000Mhz.

In certain embodiments, the dielectric substrate is made of crystalline structure ceramics doped with trace rare earth elements.

In certain embodiments, the chemical formula of the crystal structure ceramic is CaCu ₃ Ti ₄ O ₁₂ .

Compared with the prior art, the above technical solutions provided by the embodiments of the present application have the following advantages: the device provided by the embodiments of the present application realizes accurate temperature detection through wireless power supply, and is miniaturized and easy to implant.

Description of drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the invention and together with the description serve to explain the principles of the invention.

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the accompanying drawings that need to be used in the description of the embodiments or the prior art. In other words, on the premise of no creative labor, other drawings can also be obtained from these drawings.

FIG. 1 is a schematic diagram of a hardware structure of an implementation manner of a system of an implantable device and an external component provided by an embodiment of the present application;

FIG. 2 is a hardware schematic diagram of an implementation manner of a circuit system of an implantable device according to an embodiment of the present application;

FIG. 3 is a schematic hardware diagram of another implementation manner of the circuit system of the implantable device provided by the embodiment of the present application;

FIG. 4 is a schematic diagram of a circuit structure of an implementation manner of a power supply circuit provided in an embodiment of the present application;

FIG. 5 is a schematic diagram of a circuit structure of an implementation manner of a charge pump circuit provided by an embodiment of the present application;

FIG. 6 is a schematic structural diagram of a virtual battery provided by an embodiment of the present application;

7 is a schematic diagram of an equivalent circuit of a virtual battery provided by an embodiment of the present application;

FIG. 8 is a schematic structural diagram of an antenna structure and an insulating cover layer provided by an embodiment of the present application;

FIG. 9 is a schematic structural diagram of another implementation manner of an antenna structure provided by an embodiment of the present application;

FIG. 10 is a perspective view of an implementation manner of the implantable device provided in the embodiment of the application;

11A is a schematic diagram of a structure of an antenna reflection ground and a positional relationship with a dielectric substrate provided by an embodiment of the present application;

FIG. 11B is a schematic diagram of the unfolded structure of the antenna element and the positional relationship with the dielectric substrate according to the embodiment of the present application;

11C is a schematic diagram of the structure of the antenna short-circuit chip and the positional relationship with the dielectric substrate provided by the embodiment of the present application;

11D is a schematic diagram of the structure of the impedance matching microstrip line, the circuit system, and the positional relationship with the dielectric substrate provided by the embodiment of the present application;

FIG. 12 is a schematic diagram of a hardware structure of an implementation manner of an implantable device powered by wireless according to an embodiment of the present application;

FIG. 13 is a schematic diagram of the hardware structure of an implementation manner of an implantable sensor device powered by wireless provided in an embodiment of the present application;

FIG. 14 is a schematic diagram of the hardware structure of an embodiment of the implantable RFID tag device for detecting temperature provided by the embodiment of the application;

FIG. 15 is a schematic diagram of a hardware structure of an implementation manner of an implantable device provided by an embodiment of the present application; and

FIG. 16 is a schematic diagram of the hardware structure of an implementation manner of an implantable RFID tag device for acquiring animal body temperature according to an embodiment of the present application.

Detailed ways

It should be understood that the specific embodiments described herein are only used to explain the present invention, but not to limit the present invention.

In the following description, suffixes such as 'module', 'component' or 'unit' used to represent elements are used only to facilitate the description of the present invention and have no specific meaning per se. Thus, "module", "component" or "unit" may be used interchangeably.

Some embodiments of the present application relate to implantable devices having improved features that are small in size to facilitate implantation. Some embodiments of the present application relate to implantable devices having improved features for powering and/or antenna communication performance that can be implanted within an entity. Some embodiments of the present application relate to improved feature structures for wireless power supply to achieve stable wireless power supply at multiple angles, multiple distances, and relative motion. Some embodiments of the present application relate to improved features for antenna performance, enabling entities to act as part of the antenna element, thereby ensuring antenna performance while reducing the size of the implantable device. Some embodiments of the present application relate to improved structural features of an implantable device for communication performance in liquid environments, surrounding tissue (eg, muscle, fat, etc.) such that the antenna is resistant to reflections from surrounding tissue.

In some embodiments, the entity is an insulator, such as wood or other insulating materials. In some embodiments, the entity is an electrical conductor. In certain embodiments, the entity is an animal body (including a human body). The implantable device is at least partially in contact with and conducts with electrical conductors (for example, surrounding tissue of an animal body), for example, a microstrip antenna is in contact with and conducts with electrical conductors, so that the implanted entity acts as part of the antenna element to ensure antenna performance. while reducing the size of the microstrip antenna.

In some embodiments, the implantable device has a sensor unit capable of acquiring information about the implanted entity, such as temperature sensors, humidity sensors, and various other types of sensors. In some embodiments, the sensor unit is at least partially in contact with the implanted entity such that the sensor unit can detect information related to the implanted entity.

In certain embodiments, the implantable device has one or more other components, such as a device capable of applying an effect to an implanted entity, which may include a medical treatment unit. The medical treatment unit may include electrode pairs that may deliver neuromuscular electrical stimulation (NMES) pulses to nerves.

Referring to FIG. 1 , the implantable device 100 includes: a dielectric substrate 101 , an antenna 102 and a circuit system 103 , and the antenna 102 and the circuit system 103 are disposed on the dielectric substrate 101 . In the embodiment of the present application, the antenna 102 is a microstrip antenna (microstrip antenna) disposed on the dielectric substrate 101, and the antenna 102 can receive and transmit radio frequency (RF) signals. In some embodiments, the operating frequency range of the antenna 102 is 200Mhz to 1000Mhz.

In certain embodiments, circuitry 103 of implantable device 100 receives power from external components 200 . In certain embodiments, the circuitry 103 of the implantable device 100 may include a power supply (shown in the figure), and the circuitry 103 is powered by the power supply.

In some embodiments, external component 200 includes antenna 201 capable of transmitting and receiving RF signals and circuitry 202. External component 200 transmits RF signals through antenna 201 to wirelessly transmit power signals and/or communication signals, including control commands and the like, to implantable device 100 . In some embodiments, the external component 200 receives communication signals sent by the implantable device 100 through the antenna 201 , and the communication signals include control commands, data detected by the sensor unit, and identity information of the implantable device 100 .

In the embodiment of the present application, the implantable device 100 and the external component 100 perform short-range wireless communication, such as radio frequency identification (Radio Frequency Identification, RFID for short).

In some embodiments, a thin sheet of the dielectric substrate 101, one side of the dielectric substrate 101 is attached with a thin layer as a ground plane, the other side is made of a metal patch of a certain shape by a photolithographic etching method, and the patch is fed by a microstrip line. The antenna 102 is constituted. In some embodiments, the metal patch is an elongated strip, in which case the antenna 102 is referred to as a microstrip dipole antenna. In other embodiments, the metal patch is an area unit. The antenna 102 and the circuit system 103 are coupled through an impedance matching microstrip line.

In some embodiments, as shown with reference to FIG. 2 , the circuitry 103 includes a power supply circuit 1031 and a communication circuit 1032 . In some embodiments, referring to FIG. 3 , the circuit system 103 includes a power supply circuit 1031 , a communication circuit 1032 and a sensor unit 1033 . The power supply circuit 1031 stores the power obtained at the antenna, and supplies the power to the communication circuit 1032 . The communication circuit 1032 processes the communication signal obtained at the antenna 102 and transmits the communication signal to the external component 200 through the antenna 102 . In some embodiments, the power signal and the communication signal are modulated to be received simultaneously. In other embodiments, the power signal and the communication information are received separately.

In some embodiments, the implantable device 100 is configured to be implanted within an electrical conductor, so an insulating cover is provided over the circuitry 103 of the implantable device 100 to insulate the electrical circuitry 103 from the electrical conductor. In some embodiments, the implantable device 100 is configured to be implanted in a living organism (eg, muscle tissue of an animal), and the insulating cover is a biocompatible material (eg, a biomedical glue) to reduce or avoid biological rejection Phenomenon.

In some implementations, the environment in which the implantable device 100 is implanted is corrosive (eg, muscle of an organism, body fluids, etc.). In some embodiments, at least a portion of the antenna 102 of the implantable device 100 is made of a corrosion-resistant metal (eg, silver, but not limited thereto). In other embodiments, at least a portion of the surface of the antenna 102 of the implantable device 100 is provided with an anti-corrosion coating (eg, silver, but not limited thereto).

Dielectric substrate

In the embodiments of the present application, a dielectric substrate 101 with a high dielectric constant is used. For materials with high dielectric constant, reference may be made to the prior art, which will not be described in detail herein. In some embodiments, the dielectric constant of the dielectric substrate 101 is between 100 and 300, and the loss angle is lower than 0.05%. Thus, the volume of the antenna 102 is reduced, and the volume of the impedance matching microstrip line between the antenna 102 and the circuit system 103 is reduced.

In some embodiments, the dielectric substrate 101 is made of crystal structure ceramics doped with trace rare earth elements. Crystal structure ceramics have the characteristics of superior strength, hardness, insulation, heat conduction, high temperature resistance, oxidation resistance, corrosion resistance, wear resistance, high temperature strength and so on. In this way, excessive temperature of the implantable device, which can lead to performance degradation, is avoided. As an example, a ceramic with a chemical formula of CaCu ₃ Ti ₄ O ₁₂ crystal structure is used, and a trace amount of rare earth molybdenum is doped to adjust the dielectric coefficient to improve the loss angle. The dielectric constant is between 100 and 300, and the loss angle is 0.05. % within the dielectric substrate.

In some embodiments, the dielectric substrate is elongated, so as to facilitate implanting the implantable device 100 into the implanted entity, but the embodiments of the present application are not limited thereto. In some embodiments, the volume of the implantable device 100 is less than 1.2mm*1.6mm*16mm with a dielectric substrate 101 having a dielectric constant between 100 and 300 and a loss angle below 0.05%.

Wireless power supply

In the embodiment of the present application, the external component 200 transmits the RF signal through the antenna 201 . The antenna 102 of the implantable device 100 receives the RF signal transmitted by the external component 200 while the antenna 102 of the implantable device 100 has a charge on it. The strength of the charge on the antenna 102 is related to the distance between the implantable device 100 and the external component 200 and the angle between the antenna 102 and the antenna 201 . Due to differences in distance and/or angle, and when the external component 200 moves relative to the implantable device 100 (eg, when implanted in an animal), the charge on the antenna 102 is not constant, resulting in unstable power supply.

In some embodiments, referring to FIG. 4 , the power supply circuit 1031 includes: a virtual battery 10311 configured to store and provide power; and a charge pump circuit 10312 located between the antenna 102 and the virtual battery 10311 and configured to The electromotive force of the power signal obtained at the antenna 102 is boosted to charge the virtual battery 10311 .

The charge pump circuit 10312 boosts the weak and fluctuating charges obtained in the antenna 102 to a certain volt potential energy, and the certain volt potential energy charges the virtual battery 10311 to store electric energy. That is, the charge of the antenna 102 is boosted by the charge pump circuit 10312 and then stored in the virtual battery 10311 . In this way, the power supply circuit can stably supply power to other parts of the circuit system 103 , so that stable wireless power supply can be achieved when the external component 200 and the implantable device 100 are in various positional relationships. Especially when the external component 200 and the implantable device 100 move relative to each other, they can also have stable and infinite functions. In this embodiment of the present application, the potential energy can be set as required.

In this embodiment of the present application, the charge pump circuit 10312 may adopt various types of charge pump circuits for boosting. As a non-limiting example, referring to FIG. 5 , the charge pump circuit 10312 is composed of capacitors and diodes, and has the characteristics of small size and low cost. The core part of the entire working process of the charge pump circuit 10312 is the capacitor charging and discharging process. The dashed line portion in FIG. 5 represents the inclusion of any number of elements of the same structure.

Referring to FIG. 6 , the dummy battery 10311 includes a first electrode 10311 a and a second electrode 10311 b disposed on the dielectric substrate 101 . The first electrode 10311a and the second electrode 10311b are disposed opposite to each other, so that the dielectric material 10311c is interposed between the first electrode 10311a and the second electrode 10311b to form a capacitor. The dielectric material 10311 c between the two electrodes of the dummy battery 10311 is part of the dielectric substrate 101 . As an exemplary illustration, the first electrode 10311a and the second electrode 10311b are printed on the dielectric substrate 101 .

Referring to FIG. 7 , it is an equivalent diagram of the virtual battery 10311 . The amount of charge stored in the virtual battery 10311 is Q=V*C, where V is the electromotive force and C is the electric capacity. The capacitor formed by the first electrode 10311a and the second electrode 10311b of the virtual battery 10311 has a capacitance C=ε ₀ *ε*A/δ, where ε is the dielectric constant of the dielectric material 10311c, A is the first electrode 10311a, For the area of the second electrode 10311b, δ is the distance between the first electrode 10311a and the second electrode 10311b.

In this embodiment of the present application, in order to reduce the volume of the dummy battery 10311, a high dielectric constant dielectric material 10311c is used. In some embodiments, the dielectric constant of the dielectric material 10311c is between 100 and 300, thereby making the same area capacitance differ by a factor of 30. In some embodiments, the volume of the virtual battery 10311 is less than 0.8mm*0.8mm*2mm, and can store a large amount of electric charge to meet the energy demand of the circuit system.

In some embodiments, as shown in FIG. 4 , the power supply circuit 1031 further includes: an energy storage valve 10313 , which is set to make the virtual battery 1031 supply power when its electromotive force reaches the valve, so as to improve the stability of the power supply voltage. Reference can be made to the prior art for the energy storage valve 10313, which will not be repeated in this embodiment of the present application. Therefore, other parts of the circuit system 103 are made to work under a stable voltage, especially the working voltage of the sensor unit 1033 is made more stable, so as to provide the accuracy of the detection data.

In some embodiments, as shown in FIG. 4 , the power supply circuit 1031 further includes: a voltage regulator circuit 10314 coupled with the energy storage valve 10313 . The voltage regulator circuit 10314 can be referred to in the prior art, which will not be repeated in this embodiment of the present application. Therefore, other parts of the circuit system 103 are made to work under a stable voltage, especially the working voltage of the sensor unit 1033 is made more stable, so as to provide the accuracy of the detection data.

In the embodiment of the present application, when the operating frequency range of the antenna is 200Mhz to 1000Mhz, the power supply circuit 1031 can stably supply power wirelessly within a 60° sector of the external component 200 at least 1 meter away.

Wireless layout

In this embodiment of the present application, the antenna 102 is a microstrip antenna disposed on the dielectric substrate 101 , for example, at least part of the antenna 102 is disposed on the dielectric substrate 101 through a process such as electroplating. Microstrip antennas are characterized by their small size. In some embodiments, the dielectric constant of the dielectric substrate 101 is between 100 and 300, and the loss angle is lower than 0.05%, thereby greatly reducing the volume of the antenna 102 . Taking the communication frequency of 915MHz as an example, the wavelength of 915MHz is 33cm, and the quarter-wave monopole antenna model is used, and the sky size is not less than 8cm. By setting the microstrip antenna on the high dielectric constant dielectric substrate 101, The length of the antenna element can be 16mm, that is, the size of the antenna is reduced from 8cm to 16mm.

In some embodiments, the antenna 102 is provided with an anti-corrosion coating. In certain embodiments, the antenna 102 is a corrosion-resistant metal (eg, silver). In some embodiments, the antenna 102 is a silver-plated layer disposed on the dielectric substrate 101 through a silver-plating process. Thereby, use of the implantable device within an implanted entity having a corrosive environment is achieved.

In certain embodiments, the implantable device 100 is configured to be implanted within a conductive entity, eg, a live animal, edible meat, conductive liquid, and other conductive entities. In the embodiment of the present application, as shown in FIG. 8 , the circuit system 103 of the implantable device 100 is covered by an insulating cover layer 104 to insulate the circuit system 103 from the implanted entity.

In some embodiments, the implantable device 100 is configured to be implanted in a living body, and the insulating cover layer 104 is a biocompatible material to avoid or reduce the rejection of the living body, eg, a biomedical glue.

Referring to FIG. 8 , the antenna 102 includes an antenna element 1021 and an antenna reflection ground 1022 . In some embodiments, the antenna element 1021 is in contact with and conducts with the implanted entity, so that the implanted entity acts as part of the antenna element, thereby increasing the antenna gain. In some embodiments, the antenna reflective ground 1022 is in contact with the implanted entity and conducts. In other embodiments, the antenna reflection ground 1022 is insulated from the implanted entity.

In some embodiments, after the implantable device 100 is implanted into the entity, components such as the antenna 102 are in contact with the entity, and some entities are corrosive (for example, the living body or the environment containing water and salt such as eating meat), therefore, the antenna 102 The antenna element 1021 and the antenna reflection ground 1022 can be made of anti-corrosion metal (eg, silver). In other embodiments, the surfaces of the antenna element 1021 and the antenna reflection ground 1022 may be printed with an anti-corrosion coating, for example, silver plating on the surfaces of the antenna element 1021 and the antenna reflection ground 1022, but not limited thereto. In some embodiments, the antenna element 1021 and the antenna reflection ground 1022 are silver-plated layers disposed on the dielectric substrate through a silver-plating process.

Referring to FIG. 9 , in some embodiments, the antenna 102 of the implantable device 100 includes an antenna element 1021 , an antenna reflection ground 1022 and an antenna short circuit 1023 . The antenna element 1021 is arranged on one side of the dielectric substrate 101 , and the antenna reflection ground 1022 is arranged on the other side of the dielectric substrate 101 , so that the antenna element 1021 and the antenna reflection ground 1022 are arranged opposite to each other. The antenna short-circuit piece 1023 is disposed on the side surface of the dielectric substrate 101 to short-circuit the antenna element 1021 and the antenna reflection ground 1022 . When the implantable device 100 is implanted in a living body, the living body contacts and conducts with the antenna element 1021, so that the living body acts as an equivalent antenna element. In some embodiments, the antenna element 1021 is in contact with and conducts with the living body, the antenna element 1021 of the implantable device 100 acts as a 2% antenna element, and the organism acts as a 98% element equivalent. Thereby, the radiation surface of the antenna is greatly increased, and the antenna gain is improved.

In certain embodiments, when the implantable device 100 is implanted in a living body, the antenna reflection ground 1022 is in contact with and conducts with the living body, and the living body acts as part of the antenna reflection ground.

When the implantable device 100 is implanted into a living body, the antenna 102 is wrapped by surrounding tissues such as muscle and fat of the living body. The radio waves outside the body penetrate the surrounding tissue to reach the implantable device 100, and there are radio waves that propagate in different connections, which will cause reflections and degrade the performance of the antenna.

In some embodiments, as shown in FIG. 10 , the dielectric substrate 101 of the implantable device 100 is in the shape of a miniature rectangular parallelepiped. It should be understood that the rectangular parallelepiped here is a rough shape, rather than a rectangular parallelepiped in the mathematical sense. The antenna 102 and the circuit system 103 are provided on the dielectric substrate 101 having a rectangular parallelepiped shape. The antenna 102 includes: an antenna element 1021 , an antenna reflection ground 1022 and an antenna short-circuit chip 1023 . The antenna short-circuit piece 1023 short-circuits the antenna element 1021 and the antenna reflection ground 1022 .

Referring to FIGS. 10 and 11A , the antenna reflection ground 1022 is disposed on the first portion 1011 a of the larger first side surface 1011 on the dielectric substrate 101 . Referring to FIGS. 10 and 11B , the antenna element 1021 is disposed on the second side 1012 parallel to the first side 1011 , the third side 1013 with a smaller size, and the second portion 1011 b of the first side 1011 . The antenna element 1021 is configured to contact surrounding tissue when implanted in the body so that the surrounding tissue acts as part of the antenna element. Referring to FIGS. 10 and 11C , the antenna short-circuit piece 1023 , disposed on the fourth side surface 1014 parallel to the third side surface 1013 , is arranged to short the antenna element 1021 and the antenna reflection ground 1022 .

In some embodiments, as shown in FIG. 10 and FIG. 11D , the circuit system 103 is disposed on the fifth side surface 1015 that is perpendicular to the first side surface 1011 . 10, 11A, 11B and 11D, the first impedance matching microstrip line 105a is arranged between the antenna element 1021 and the circuit system 103; and the second impedance matching microstrip line 105b is arranged at the antenna reflection ground 1022 between the circuit system 103 . Referring to FIGS. 11A , 11B and 11D, the first impedance matching microstrip line 105a is coupled with the portion of the antenna element 1021 located on the second side surface 1012 . The second impedance matching microstrip line 105b is coupled to the antenna reflection ground 1022 .

In some embodiments, an insulating cover layer 104 is provided on the circuit system 103 to insulate the circuit system 103 from the surrounding tissue of the living body. Optionally, the insulating cover layer 104 is a biocompatible material, such as a biomedical glue , to avoid or reduce the rejection of organisms.

In some embodiments, an anti-corrosion coating is provided at least in part in the antenna element 1021 , the antenna reflection ground 1022 and the antenna shorting plate 1023 , such as silver plating on the surfaces thereof. In other embodiments, the antenna element 1021 , the antenna reflection ground 1022 and the antenna short-circuit plate 1023 are made of anti-corrosion metal.

In some embodiments, when implanted in a living body, the antenna element 1021 , the antenna reflection ground 1022 and the antenna shorting piece 1023 are in contact with and conduct with the surrounding tissue of the living body, and the equivalent of the surrounding tissue is used as the antenna filling material Against reflexes. In some embodiments, the antenna reflection ground 1022 and/or the antenna short 1023 are insulated from the surrounding tissue of the living body.

In some embodiments, the operating frequency range of the antenna 102 is 200Mhz to 1000Mhz.

With the layout of the antenna 102 shown in FIGS. 10 and 11A to 11D , when the implantable device is implanted in a body such as a body, the antenna 102 can resist the reflection effect of the body such as a body, and realize multi-directional stereo transmission and reception of RF signals .

It should be understood that the layout of the antenna 102 shown in FIG. 10 and FIGS. 11A to 11D is only for exemplary illustration, and those skilled in the art can adjust the size, setting position, etc. of the antenna components as needed based on the technology herein.

Example 1

Embodiment 1 of the present application provides an implantable device powered by wireless. The implantable device is powered by wireless, and can stably supply power in multi-angle, multi-specific, and relative motion, ensuring implantable power. The stability of the device operation. The implantable device is also miniaturized for easy implantation.

12, Embodiment 1 of the present application provides an implantable device powered by wireless, including: a dielectric substrate 10; an antenna 20, where the antenna 20 is a microstrip antenna disposed on the dielectric substrate 10; and a power supply circuit 30, coupled to the antenna 20 .

In some embodiments, the dielectric constant of the dielectric substrate 10 is between 100 and 300. In some embodiments, the dielectric loss of the dielectric substrate 10 is less than 0.05%. For the dielectric substrate 10, reference is made to the foregoing description of the dielectric substrate 101, which is not repeated here.

In this embodiment, the power supply circuit 30 includes: a virtual battery 31, including a first electrode and a second electrode disposed on a dielectric substrate, the first electrode and the second electrode and the dielectric material between them form a capacitor ( 6), a virtual battery 31 is set to store power and supply power; and a charge pump circuit 32, located between the antenna 20 and the virtual battery 31, is set to boost the electromotive force of the power signal obtained at the antenna 20 to The virtual battery 31 is charged. In certain embodiments, the antenna 20 is arranged to contact the implanted entity when implanted, so that the implanted entity acts as part of the antenna element.

In some embodiments, as shown in FIG. 12 , the power supply circuit 30 further includes: an energy storage valve 33 , which is set to make the virtual battery 31 supply power when its electromotive force reaches the valve; coupling.

In some embodiments, an anti-corrosion coating is provided on the antenna 20 . In some embodiments, the antenna 20 is a corrosion-resistant metal. In some embodiments, the antenna 20 is a silver-plated layer disposed on the dielectric substrate 10 through a silver-plating process. Thereby, the implantable device is enabled to be used within an implanted entity having a corrosive environment.

In some embodiments, the wirelessly powered implantable device further comprises: an insulating cover layer disposed on the power supply circuit 30, so that the power supply circuit 30 and the conductor are connected to the power supply circuit 30 when the implantable device is implanted in the conductor. insulation. In certain embodiments, the electrical conductor is a living body and the insulating cover layer is a biocompatible material.

In certain embodiments, as shown with reference to FIG. 12 , the implantable device further includes a communication circuit 40 coupled to the antenna 20 and configured to receive and/or transmit communication signals through the antenna 20 . In some embodiments, the communication circuit 40 is an RFID tag chip.

In some embodiments, the antenna 20 may refer to the description of the antenna 102 in this document, which will not be repeated here.

Example 2

Embodiment 2 of the present application provides an implantable sensor device powered by wireless, the implantable sensor device is powered by wireless and has a sensor unit capable of detecting data related to an implanted entity. The implantable sensor device also has the characteristics of miniaturization and easy implantation.

Referring to FIG. 13 , the wirelessly powered implantable sensor device provided in Embodiment 2 of the present application includes: a dielectric substrate 10 ; an antenna 20 , where the antenna 20 is a microstrip antenna disposed on the dielectric substrate 10 ; a sensor unit 50 A communication circuit 40, coupled with the antenna 20 and the sensor unit 50, is configured to acquire detection data from the sensor unit 60, and to transmit the detection data through the antenna 20; The communication circuit 40 supplies power, and the power supply circuit 30 includes: a virtual battery 31 including a first electrode and a second electrode disposed on the dielectric substrate, and the virtual battery 31 is configured to store the power signal obtained by the antenna.

In some embodiments, as shown in FIG. 13 , the power supply circuit 30 further includes: a charge pump circuit 32 located between the antenna 20 and the dummy battery, and configured to boost the electromotive force of the power signal obtained at the antenna 20 , so as to send a charge pump circuit 32 to the dummy battery. The battery 31 is charged. In some embodiments, as shown in FIG. 13 , the power supply circuit 30 further includes: an energy storage valve 33 , which is set to make the virtual battery 31 supply power when its electromotive force reaches the valve; coupling.

In some embodiments, the sensor unit 50, configured to be implanted with the detection entity, at least partially contacts the detection entity to detect information related to the detection entity.

In certain embodiments, the antenna 20 is arranged to contact the electrical conductor when the implantable sensor device is implanted within the electrical conductor, so that the electrical conductor acts as part of the antenna element.

In certain embodiments, the implantable sensor device further includes: an anti-corrosion coating disposed on the antenna 20 .

In some embodiments, the implantable sensor device further includes: an insulating cover layer disposed on at least the power supply circuit 30 and the communication circuit 40, so that the power supply circuit and the communication circuit can be connected to the electrical conductor when the implantable sensor device is implanted in the conductor. body insulation. In certain embodiments, the electrical conductor is a living body and the insulating cover layer is a biocompatible material.

In some embodiments, the antenna 20 may refer to the description of the antenna 102 in this document, which will not be repeated here. For the dielectric substrate 10, reference is made to the foregoing description of the dielectric substrate 101, which is not repeated here.

In Embodiment 2, the external component 200 communicates with the implantable sensor device, wirelessly provides power and communication signals to the implantable sensor device, so that the implantable sensor device performs detection and transmission of detection data through the power.

Example 3

Embodiment 3 of the present application provides an implantable RFID tag device for detecting temperature, the implantable RFID tag device is powered by RFID communication and wireless, and has a temperature sensor, through which an implanted entity is detected. The temperature information and the ID of the RFID tag device are sent to the external components through the RFID tag chip.

Referring to FIG. 14 , the implantable RFID tag device for detecting temperature provided by the embodiment of the present application includes: a dielectric substrate 10; an antenna 20, where the antenna 20 is a microstrip antenna printed on the dielectric substrate 10; a temperature sensor 51; the RFID tag chip 41, coupled with the antenna 20 and the temperature sensor 51, is configured to acquire temperature data from the temperature sensor 51, and transmit the temperature data and the ID of the RFID tag through the antenna 20; and the power supply circuit 30, coupled with the antenna 20, Set to provide power to the temperature sensor 51 and the RFID tag chip 41, the power supply circuit 30 includes: a virtual battery 31, including a first electrode and a second electrode arranged on the medium substrate 10, the virtual battery 31 is set to be stored in the antenna 20 to obtain power signal.

In some embodiments, as shown in FIG. 14 , the power supply circuit 30 further includes: a charge pump circuit 32 located between the antenna 20 and the dummy battery, and configured to boost the electromotive force of the power signal obtained at the antenna 20 , so as to send the electric power to the dummy battery. The battery 31 is charged. In some embodiments, as shown in FIG. 14 , the power supply circuit 30 further includes: an energy storage valve 33 , which is set to make the virtual battery 31 supply power when its electromotive force reaches the valve; coupling.

In some embodiments, the temperature sensor 51 is arranged to at least partially contact the detection entity when implanted in the detection entity to detect the temperature of the detection entity.

In certain embodiments, the antenna 20 is configured to contact the electrical conductor when the implantable RFID tag device is implanted within the electrical conductor, so that the electrical conductor acts as part of the antenna element.

In certain embodiments, the implantable RFID tag device further includes: an anti-corrosion coating disposed on the antenna 20 .

In some embodiments, the implantable RFID tag device further includes: an insulating cover layer, which is provided at least on the power supply circuit 30 and the RFID tag chip 51, so that the implantable RFID tag device can supply power to the circuit 30 and the RFID tag chip 51 when the implantable RFID tag device is implanted in the conductor. The RFID tag chip 51 is insulated from the conductor. In some embodiments, the electrical conductor is a living body, and the insulating cover layer is a biocompatible material, such as a biomedical glue.

In some embodiments, the antenna 20 may refer to the description of the antenna 102 in this document, which will not be repeated here. For the dielectric substrate 10, reference is made to the foregoing description of the dielectric substrate 101, which is not repeated here.

In Example 3, the implantable RFID tag device communicates with an RFID reader. After the implantable RFID tag device enters the communication range of the RFID reader, the RFID reader transmits an RF signal through its antenna. The implantable RFID tag device receives this RF signal, extracts power from it, and supplies the power to the RFID tag chip and temperature sensor. The RFID tag chip communicates with the RFID reader, the RFID reader sends a temperature measurement command to the RFID tag chip, and the RFID tag chip acquires temperature data from the temperature sensor in response to the temperature measurement command. The RFID tag chip sends the acquired temperature data and the ID of the RFID tag to the RFID reader. The RFID reader/writer obtains the temperature data and the ID of the RFID tag.

In some embodiments, the RFID reader/writer is fixed at a certain position, and the implanted entity (such as an animal body) that can implant the RFID tag device approaches the position and enters the communication range of the RFID reader/writer, and performs the aforementioned temperature measurement process.

In some embodiments, the RFID reader/writer (eg, a handheld device) can move relative to the implanted entity with the implantable RFID tag device, which is not limited in this embodiment of the present application.

Example 4

Embodiment 4 of the present application provides an implantable device. When the implantable device is implanted into a living body, its antenna is in contact with surrounding tissues such as muscle and fat of the living body, so that the living body acts as a part of the antenna element, And through the antenna layout, the implantable device is resistant to reflections from surrounding tissue.

Referring to FIG. 15 , the implantable device provided by the embodiment of the present application includes: a dielectric substrate 10 ; and an antenna 20 , which is disposed on the dielectric substrate 10 .

10, 11A to 11D, the layout of the antenna 20 in the embodiment of the present application is shown in reference to FIGS. 10 and 11A to 11D. The dielectric substrate is in the shape of a rectangular parallelepiped. The first part 1011a of a side surface 1011; the antenna element 1021, the antenna element 1021 is arranged on the second side surface 1012 parallel to the first side surface 1011, the third side surface 1013 with a smaller size, and the second part 1011b of the first side surface 1011; the antenna The element 1021 is arranged to contact surrounding tissue when implanted in the body, so that the surrounding tissue acts as part of the antenna element; and the antenna shorting piece 1023, arranged on the fourth side 1014 parallel to the third side 1013, is arranged to connect the antenna element 1021 Short-circuit with the antenna reflection ground 1022.

In certain embodiments, the implantable device further includes: circuitry 300 . 10 and 11D, the circuit system 300 (corresponding to the circuit system 103) is arranged on the fifth side surface 1015 perpendicular to the first side surface 1011; the circuit system 300 (corresponding to the circuit system 103) An insulating cover layer 104 is provided thereon to insulate the circuitry 30 (corresponding to circuitry 103 ) from surrounding tissue. Impedance matching is performed between the circuit system 300 and the antenna 20 through a microstrip line. Referring to FIG. 10 and FIG. 11D , the first impedance matching microstrip line 105a is disposed between the antenna element 1021 and the circuit system 300 (corresponding to the circuit system 103 ). The second impedance matching microstrip line 105b is disposed between the antenna reflection ground 1022 and the circuit system 300 (corresponding to the circuit system 103).

In some embodiments, the implantable device further includes: an anti-corrosion coating disposed on the antenna 20 . In some embodiments, the antenna reflection ground 1022 , the antenna element 1021 and the antenna shorting plate 1023 are printed silver bars. In some embodiments, the antenna element 1021 completely covers the second side surface 1012 and the third side surface 1013 .

In some embodiments, the antenna 20 may refer to the description of the antenna 102 in this document, which will not be repeated here. For the dielectric substrate 10, reference is made to the foregoing description of the dielectric substrate 101, which is not repeated here.

In some embodiments, the insulating cover layer on circuit system 20 is a biocompatible material.

In some embodiments, the antenna 20 is configured to provide power signals and/or communication signals to the circuitry 300 . The circuitry 300 is configured to receive power signals and/or communication signals from the antenna.

In some embodiments, the circuit system 300 may include the power supply circuit 30 described above, which will not be repeated here.

Example 5

Embodiment 5 of the present application provides an implantable RFID tag device for acquiring the body temperature of an animal, and the implantable RFID tag device has a temperature sensor. When the implantable RFID tag device is implanted into the animal body, the RFID tag chip and the temperature sensor are wirelessly powered through the external components, and the RFID tag chip obtains the animal body temperature detected by the temperature sensor, and sends the ID and body temperature data of the RFID tag to the external components. .

Referring to FIG. 16 , the implantable RFID tag device for acquiring animal body temperature provided by this embodiment of the present application includes: a dielectric substrate 10 ; an antenna 20 , which is disposed on the dielectric substrate 10 ; and a body temperature detection circuit 60 . The body temperature detection circuit 60 includes: a temperature sensor 61 configured to detect temperature and generate a temperature signal; an RFID tag chip 62 configured to acquire the temperature signal of the temperature sensor 61 and send the temperature signal and the ID of the RFID tag through the antenna 20 .

10, 11A to 11D, the layout of the antenna 20 in the embodiment of the present application is shown in reference to FIGS. 10 and 11A to 11D. The dielectric substrate is in the shape of a rectangular parallelepiped. The first part 1011a of the first side 1011; the antenna element 1021, the antenna element 1021 is arranged on the second side 1012 parallel to the first side 1011, the third side 1013 with a smaller size, and the second part 1011b of the first side 1011; The antenna element 1021 is arranged to contact surrounding tissue when implanted in the body, so that the surrounding tissue acts as part of the antenna element; and the antenna shorting piece 1023, arranged on the fourth side 1014 parallel to the third side 1013, is arranged to connect the antenna element 1021 is shorted to the antenna reflection ground 1022.

10 and 11D, the body temperature detection circuit 60 (corresponding to the circuit system 103) is arranged on the fifth side 1015 perpendicular to the first side 1011; the body temperature detection circuit 60 (corresponding to the circuit System 103) is provided with an insulating cover layer 104 to insulate body temperature detection circuit 60 (corresponding to circuit system 103) from surrounding tissue. Impedance matching is performed between the body temperature detection circuit 60 and the antenna 20 through a microstrip line. Referring to FIG. 10 and FIG. 11D , the first impedance matching microstrip line 105a is provided between the antenna element 1021 and the body temperature detection circuit 60 (corresponding to the circuit system 103 ). The second impedance matching microstrip line 105b is arranged between the antenna reflection ground 1022 and the body temperature detection circuit 60 .

In the embodiment of the present application, the body temperature detection circuit 60 is provided with an insulating cover layer to insulate the body temperature detection circuit 60 from surrounding tissues.

In some embodiments, the implantable RFID tag device is powered by wireless, as shown in FIG. 16 , it further includes: a power supply circuit 30 coupled to the antenna 20 , and the power supply circuit 30 includes: a virtual battery 31 , including a The first electrode and the second electrode on the dielectric substrate are arranged to store electric power and provide electric power to the body temperature detection circuit 60; and the charge pump circuit 32, located between the antenna 20 and the virtual battery 31, is arranged to lift the obtained power from the antenna 20. The electromotive force of the power signal to charge the virtual battery 31 . Wherein, the power supply circuit 30 is covered by an insulating covering layer to insulate the power supply circuit 30 from the surrounding tissue.

In some embodiments, as shown in FIG. 16 , the power supply circuit 30 further includes: an energy storage valve 33 , which is set so that the virtual battery 31 supplies power when its electromotive force reaches the valve; a voltage regulator circuit 34 is coupled with the energy storage valve .

In certain embodiments, the implantable RFID tag device further includes: an anti-corrosion coating disposed on the antenna 20 . In some embodiments, the antenna reflection ground 1022 , the antenna element 1021 and the antenna shorting plate 1023 are printed silver bars.

In some embodiments, the antenna element 1021 completely covers the second side and the third side.

In some embodiments, the antenna 20 may refer to the description of the antenna 102 in this document, which will not be repeated here. For the dielectric substrate 10, reference is made to the foregoing description of the dielectric substrate 101, which is not repeated here.

In certain embodiments, the insulating cover layer is a biocompatible material.

In Example 5, an implantable RFID tag device communicates with an RFID reader/writer. The animal body implanted with the implantable RFID tag device enters the communication range of the RFID reader, and the RFID reader transmits RF signals through its antenna. The implantable RFID tag device receives this RF signal, extracts power from it, and supplies the power to the RFID tag chip and temperature sensor. The RFID tag chip communicates with the RFID reader, the RFID reader sends a temperature measurement command to the RFID tag chip, and the RFID tag chip acquires temperature data from the temperature sensor in response to the temperature measurement command. The RFID tag chip sends the acquired temperature data and the ID of the RFID tag to the RFID reader. The RFID reader/writer obtains the temperature data and the ID of the RFID tag.

In some embodiments, the RFID reader/writer is fixed at a certain position, and the animal body implanted with the implantable RFID tag device approaches the position and enters the communication range of the RFID reader/writer, and then performs the aforementioned temperature measurement process.

In some embodiments, the RFID reader/writer (eg, a handheld device) can move relative to an animal body into which the implantable RFID tag device can be implanted, which is not limited in this embodiment of the present application.

It should be noted that, herein, the terms "comprising", "comprising" or any other variation thereof are intended to encompass non-exclusive inclusion, such that a process, method, article or device comprising a series of elements includes not only those elements, It also includes other elements not expressly listed or inherent to such a process, method, article or apparatus. Without further limitation, an element qualified by the phrase "comprising a..." does not preclude the presence of additional identical elements in a process, method, article or apparatus that includes the element.

The above-mentioned serial numbers of the embodiments of the present invention are only for description, and do not represent the advantages or disadvantages of the embodiments.

The embodiments of the present invention have been described above in conjunction with the accompanying drawings, but the present invention is not limited to the above-mentioned specific embodiments, which are merely illustrative rather than restrictive. Under the inspiration of the present invention, without departing from the scope of protection of the present invention and the claims, many forms can be made, which all belong to the protection of the present invention.

Claims (10)

1. An implantable RFID tag device for detecting temperature, comprising:

the dielectric substrate has a dielectric constant of 100-300 and a loss angle of 0.05% or less;

an antenna, which is a microstrip antenna printed on the dielectric substrate, the antenna being arranged to contact a detection entity when implanted, such that the detection entity acts as part of an antenna element;

a temperature sensor;

an RFID tag chip coupled to the antenna and the temperature sensor, configured to acquire temperature data from the temperature sensor, and to transmit the temperature data and an ID of an RFID tag through the antenna; and

a power supply circuit coupled to the antenna and configured to provide power to the temperature sensor and the RFID tag chip, the power supply circuit comprising:

a virtual battery comprising a first electrode and a second electrode disposed on the dielectric substrate, the virtual battery configured to store a power signal obtained at the antenna; and

a charge pump circuit, located between the antenna and the virtual battery, configured to boost an electromotive force of a power signal obtained at the antenna to charge the virtual battery.

2. The implantable RFID tag device of claim 1, wherein the temperature sensor is configured to at least partially contact a detection entity when implanted to detect a temperature of the detection entity.

3. The implantable RFID tag device of claim 1, further comprising: an anti-corrosion coating disposed on the antenna; alternatively, the antenna is an anti-corrosion metal.

4. The implantable RFID tag device of claim 1, wherein the antenna is a silver plated layer disposed on the dielectric substrate by a silver plating process.

5. The implantable RFID tag device of claim 1, wherein the power supply circuit further comprises: an energy storage valve arranged such that the virtual battery supplies power when its electromotive force reaches the valve; and the voltage stabilizing circuit is coupled with the energy storage valve.

6. The implantable RFID tag device of claim 1, further comprising:

and the insulating covering layer is at least arranged on the power supply circuit and the RFID tag chip so as to insulate the power supply circuit and the RFID tag chip from the detection entity when the power supply circuit and the RFID tag chip are implanted into the detection entity.

7. The implantable RFID tag device of claim 6, wherein the insulating cover layer is a biocompatible material.

8. The implantable RFID tag device of claim 1, wherein the antenna has an operating frequency range of 200Mhz to 1000 Mhz.

9. The implantable RFID tag device of claim 1, wherein the dielectric substrate is a ceramic of a crystalline structure doped with trace rare earth elements.

10. The implantable RFID tag device of claim 9, wherein the crystal structure ceramic has a chemical formula of CaCu₃Ti₄O₁₂。

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