Implantable medical device Bluetooth antenna and resonance adjustment method

Abstract

The invention provides an implantable medical device Bluetooth antenna and a resonance adjustment method, and relates to the technical field of medical devices. Comprising a vertical first linear antenna section, and the upper end of the first linear antenna section is connected with one end of a first arc-shaped antenna section; the other end of the first arc-shaped antenna section is connected with one end of a horizontal second linear antenna section, and the other end of the second linear antenna section is connected with one end of a second arc-shaped antenna section; the Bluetooth antenna is used for being implanted into a human body after being packaged. According to the invention, high gain can still be maintained in a complex electromagnetic environment of a human body, and the data transmission distance and reliability between the implantable device and the external Bluetooth device are effectively improved.

Description

Technical Field

[0001] The present invention relates to the technical field of medical devices, and in particular to an implantable medical device Bluetooth antenna and a resonance adjustment method. Background Art

[0002] With the continuous development of medical technology, implantable medical devices such as pacemakers and heart rate monitoring devices have been widely used. These devices need to interact with external monitoring devices or data processing terminals to achieve real-time monitoring of the patient's health status and remote adjustment of device parameters. Bluetooth technology has become one of the ideal choices for implantable devices to communicate with the outside world due to its low power consumption and short-range communication characteristics. However, existing implantable Bluetooth antennas face many challenges. On the one hand, human tissue has an absorption and attenuation effect on Bluetooth signals, requiring the antenna to maintain good radiation performance and communication efficiency in the complex electromagnetic environment of the human body; on the other hand, the size of the implantable antenna needs to adapt to the limited space and physiological structure inside the human body, while also meeting biocompatibility requirements to avoid adverse effects on human tissue. Therefore, it is of great significance to develop a Bluetooth antenna suitable for the conditions of implantable medical devices. Summary of the invention

[0003] The purpose of the present invention is to provide an implantable medical device Bluetooth antenna and a resonance adjustment method to address the deficiencies in the above-mentioned prior art, so as to maintain a high gain in the complex electromagnetic environment of the human body, thereby effectively improving the data transmission distance and reliability between the implantable device and the external Bluetooth device.

[0004] To achieve the above purpose, the technical solution adopted in the embodiment of the present application is as follows:

[0005] In the first aspect, an embodiment of the present application provides an implantable medical device Bluetooth antenna, comprising: a vertical first straight antenna segment, the upper end of the first straight antenna segment is connected to one end of a first arc-shaped antenna segment; the other end of the first arc-shaped antenna segment is connected to one end of a horizontal second straight antenna segment, and the other end of the second straight antenna segment is connected to one end of the second arc-shaped antenna segment; the Bluetooth antenna is packaged for implantation in the human body; the Bluetooth antenna adopts a coplanar waveguide feeding method, and the transmission line of the Bluetooth antenna and the ground plane are located in the same plane; the feeding line of the Bluetooth antenna includes an impedance matching network, and the impedance matching network includes a capacitor connected in series with the Bluetooth antenna and an inductor connected in parallel with the Bluetooth antenna; the inductor is grounded, and the capacitor is connected to a circuit board; the ground plane is a shell that encapsulates the Bluetooth antenna.

[0006] In one embodiment, the length of the first straight antenna segment is 2.58 mm; the length of the first arc antenna segment and the second arc antenna segment is 3.14 mm; the length of the second straight antenna segment is 3.2 mm; the line width of the feeder of the Bluetooth antenna is 0.38 mm; the inductor is 3nH; the capacitor is 1pF; the input impedance and output impedance of the Bluetooth antenna are 50Ω.

[0007] In one implementation, the other end of the second arc-shaped antenna segment is connected to one end of a vertical third linear antenna segment; and the length of the third linear antenna segment is 1.5 mm.

[0008] In one embodiment, the other end of the third linear antenna segment is connected to one end of the fourth linear antenna segment; the other end of the fourth linear antenna segment is connected to one end of a vertical fifth linear antenna segment; and the fifth linear antenna segment is parallel to the third linear antenna segment.

[0009] In one implementation, the other end of the fifth straight antenna segment is connected to one end of the third arc-shaped antenna segment; and the third arc-shaped antenna segment is parallel to the second arc-shaped antenna segment.

[0010] In one embodiment, the other end of the second arc-shaped antenna segment is connected to one end of the sixth straight line antenna segment, and the other end of the sixth straight line antenna segment is connected to one end of the fourth arc-shaped antenna segment; the fourth arc-shaped antenna segment is parallel to the second arc-shaped antenna segment.

[0011] In one implementation, the other end of the fourth arc-shaped antenna segment is connected to one end of a seventh linear antenna segment; and the seventh linear antenna segment is parallel to the second linear antenna segment.

[0012] In one implementation, the other end of the seventh straight antenna segment is connected to one end of the fifth arc-shaped antenna segment; and the fifth arc-shaped antenna segment is parallel to the first arc-shaped antenna segment.

[0013] In one implementation, the other end of the fifth arc-shaped antenna segment is connected to a vertical eighth linear antenna segment; the eighth linear antenna segment is parallel to the first linear antenna segment.

[0014] In second aspect, an embodiment of the present application provides a method for adjusting the resonance of a Bluetooth antenna, comprising: establishing a human body model in CST software to simulate the working condition of a Bluetooth antenna in a human body; adjusting the size and position of the Bluetooth antenna to adjust the resonance generated by the Bluetooth antenna in the Bluetooth communication frequency band; adjusting the size and position of the Bluetooth antenna comprises: reducing the height of the Bluetooth antenna by 5 mm; reducing the length of the Bluetooth antenna by 6.6 mm.

[0015] In one embodiment, the method further includes: performing human tissue simulation through the CST software to determine the absorption of the radiation of the Bluetooth antenna by the human tissue; and evaluating and optimizing the stability and reliability of the Bluetooth antenna based on the absorption of the radiation of the Bluetooth antenna by the human tissue.

[0016] The beneficial effects of this application are: through precise simulation design using CST software, a high gain can still be maintained in the complex electromagnetic environment of the human body, effectively improving the data transmission distance and reliability between the implantable device and the external Bluetooth device, and contributing to the realization of remote and accurate monitoring and medical intervention of the patient's health status. The coplanar waveguide feeding and matching network design are adopted to achieve good impedance matching, reduce energy loss during signal transmission, improve communication efficiency, reduce the power consumption requirements of implantable devices, and extend battery life. The meandering structure (1 / 2 square structure) and bandwidth extension design enable the antenna to adapt to changes in the Bluetooth communication frequency band and the influence of human tissue on the signal, ensuring the stability and continuity of communication. The selection of materials and structural design with good biocompatibility ensure the safety and long-term stability of the antenna inside the human body, reduce adverse reactions and complications caused by implanted antennas, and improve the safety and comfort of patients. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for use in the embodiments are briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without creative work.

[0018] Figure 1 A schematic diagram of the structure of an implantable medical device Bluetooth antenna provided in an embodiment of the present application;

[0019] Figure 2 A schematic diagram of the structure of an implantable medical device Bluetooth antenna provided in an embodiment of the present application;

[0020] Figure 3 A schematic diagram of the structure of an implantable medical device Bluetooth antenna provided in an embodiment of the present application;

[0021] Figure 4 A schematic diagram of return loss of a Bluetooth antenna for an implantable medical device provided in an embodiment of the present application;

[0022] Figure 5 A gain schematic diagram of a Bluetooth antenna for an implantable medical device provided in an embodiment of the present application;

[0023] Figure 6A schematic diagram of the efficiency of an implantable medical device Bluetooth antenna provided in an embodiment of the present application;

[0024] Figure 7 A schematic diagram of the structure of an implantable medical device Bluetooth antenna provided in an embodiment of the present application;

[0025] Figure 8 A schematic diagram of the structure of an implantable medical device Bluetooth antenna provided in an embodiment of the present application;

[0026] Fig. 9 A schematic diagram of the structure of an implantable medical device Bluetooth antenna provided in an embodiment of the present application;

[0027] Fig.10 A schematic diagram of the structure of an implantable medical device Bluetooth antenna provided in an embodiment of the present application;

[0028] Fig.11 A schematic diagram of return loss of a Bluetooth antenna for an implantable medical device provided in an embodiment of the present application;

[0029] Fig.12 A gain schematic diagram of a Bluetooth antenna for an implantable medical device provided in an embodiment of the present application;

[0030] Fig.13 A schematic diagram of the efficiency of an implantable medical device Bluetooth antenna provided in an embodiment of the present application;

[0031] Fig.14 A schematic diagram of the structure of an implantable medical device Bluetooth antenna provided in an embodiment of the present application;

[0032] Fig.15 A schematic diagram of the structure of an implantable medical device Bluetooth antenna provided in an embodiment of the present application;

[0033] Fig.16 A schematic diagram of a flow chart of a resonance adjustment method of a Bluetooth antenna provided in an embodiment of the present application;

[0034] Fig.17 A schematic diagram of a human body model in a resonance adjustment method of a Bluetooth antenna provided in an embodiment of the present application;

[0035] Fig.18 A schematic diagram of a Bluetooth antenna working condition in a human body simulated in a Bluetooth antenna resonance adjustment method provided in an embodiment of the present application;

[0036] Fig.19 A schematic diagram of adjusting the size and position of a Bluetooth antenna in a method for adjusting the resonance of a Bluetooth antenna provided in an embodiment of the present application;

[0037] Fig. 20A schematic diagram of evaluating a Bluetooth antenna in a method for adjusting the resonance of a Bluetooth antenna provided in an embodiment of the present application;

[0038] Fig.21 A schematic diagram of a human body simulation result in a resonance adjustment method of a Bluetooth antenna provided in an embodiment of the present application;

[0039] Fig. 22 A schematic diagram of a model and software interface solved in a resonance adjustment method for a Bluetooth antenna provided in an embodiment of the present application. DETAILED DESCRIPTION

[0040] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings 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.

[0041] Therefore, the following detailed description of the embodiments of the present application provided in the accompanying drawings is not intended to limit the scope of the present application for which protection is sought, but merely represents selected embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in the field without creative work are within the scope of protection of the present application.

[0042] In the description of the present application, it should be noted that if the terms "upper", "lower", etc. appear, the orientation or position relationship indicated is based on the orientation or position relationship shown in the drawings, or is the orientation or position relationship in which the product of the application is usually placed when used. It is only for the convenience of describing the present application and simplifying the description, and does not indicate or imply 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 application.

[0043] In addition, the terms "first", "second", etc. in the specification and claims of the present invention and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchanged where appropriate, so that the embodiments of the present invention described herein can be implemented in an order other than those illustrated or described herein. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device that includes a series of steps or units is not necessarily limited to those steps or units that are clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0044] It should be noted that, in the absence of conflict, the features in the embodiments of the present application may be combined with each other.

[0045] Figure 1 , Figure 2 A schematic diagram of the structure of an implantable medical device Bluetooth antenna provided in an embodiment of the present application; Figure 1 , Figure 2 As shown, the implantable medical device Bluetooth antenna includes:

[0046] A vertical first straight antenna segment 1, the upper end of which is connected to one end of a first arc-shaped antenna segment 2; the other end of the first arc-shaped antenna segment 2 is connected to one end of a horizontal second straight antenna segment 3, the other end of the second straight antenna segment 3 is connected to one end of a second arc-shaped antenna segment 4; the Bluetooth antenna is packaged for implantation in the human body.

[0047] Furthermore, the length of the first linear antenna segment 1 is 2.58 mm; the length of the first arc-shaped antenna segment 2 and the second arc-shaped antenna segment 4 is 3.14 mm; and the length of the second linear antenna segment 3 is 3.2 mm.

[0048] The Bluetooth antenna is made of biocompatible material MP35N, and the Bluetooth antenna is packaged with medical silicone or biocompatible polymer material Polyurethane.

[0049] Specifically, MP35N is a flexible substrate material with good biocompatibility, low toxicity, good mechanical and chemical properties, and can adapt to the long-term implantation environment inside the human body. The Bluetooth antenna adopts the above structure, which can increase the effective electrical length of the antenna in a limited space, thereby improving the antenna gain. The Bluetooth antenna is encapsulated and encapsulated with medical silicone or biocompatible polymer material Polyurethane, which can protect the Bluetooth antenna to a certain extent, prevent it from directly contacting human tissue and causing adverse reactions, and also play a certain role in insulation and isolation.

[0050] The Bluetooth antenna adopts a coplanar waveguide feeding method, and the transmission line of the Bluetooth antenna and the ground plane are located in the same plane; the feeding line of the Bluetooth antenna includes an impedance matching network, and the impedance matching network includes a capacitor connected in series with the Bluetooth antenna and an inductor connected in parallel with the Bluetooth antenna; the inductor is grounded, and the capacitor is connected to the circuit board; the ground plane is the shell that encapsulates the Bluetooth antenna; the line width of the Bluetooth antenna feeder is 0.38mm; the inductor is 3nH; the capacitor is 1pF; the input impedance and output impedance of the Bluetooth antenna are 50Ω.

[0051] Among them, the 0.38mm Bluetooth antenna feeder line width can achieve good impedance matching. Introducing an impedance matching network in the feeder line can further optimize the input impedance of the Bluetooth antenna so that it can match the output impedance of the Bluetooth communication module in the implantable device, reduce signal reflection, and improve transmission efficiency.

[0052] like Figure 3 As shown, the other end of the second arc-shaped antenna segment 4 is connected to one end of the vertical third linear antenna segment 5; the length of the third linear antenna segment 5 is 1.5 mm.

[0053] The other end of the second arc-shaped antenna segment 4 is connected to a vertical third linear antenna segment 5. Figure 1 The Bluetooth antenna in the antenna increases the effective electrical length of the antenna, thereby improving the antenna gain. Figures 4 to 6 As shown, they are Figure 3 The return loss, gain, and efficiency graph of the Bluetooth antenna in human tissue is shown. Figure 4 This indicates that the Bluetooth antenna has S11 < -10 dB in the required frequency band, making the transmission efficiency of the Bluetooth signal itself greater than 90%. Figure 5 This indicates that the Bluetooth antenna has the highest gain and the best radiation at a specific frequency. Figure 6 This shows that the total efficiency of Bluetooth antennas through the skin remains above 2.57%, which is a significant improvement compared to other antennas with a total efficiency of less than 1%. The Bluetooth antenna optimization solution reduces the antenna height by 2mm in structure, and its overall performance is better than that of other manufacturers.

[0054] like Figure 7 As shown, the other end of the third linear antenna segment 5 is connected to one end of the fourth linear antenna segment 6 ; the other end of the fourth linear antenna segment 6 is connected to one end of the vertical fifth linear antenna segment 7 ; the fifth linear antenna segment 7 is parallel to the third linear antenna segment 5 .

[0055] The other end of the third linear antenna segment 5 is connected in sequence to the fourth linear antenna segment 6 and the fifth linear antenna segment 7. Figure 3 The Bluetooth antenna in the PCB further increases the effective electrical length of the antenna, thereby improving the antenna gain.

[0056] like Figure 8 As shown, the other end of the fifth straight antenna segment 7 is connected to one end of the third arc-shaped antenna segment 8 ; the third arc-shaped antenna segment 8 is parallel to the second arc-shaped antenna segment 4 .

[0057] The other end of the fifth linear antenna segment 7 is connected to the third arc-shaped antenna segment 8. Figure 7 The Bluetooth antenna in the PCB further increases the effective electrical length of the antenna, thereby improving the antenna gain.

[0058] like Fig. 9 As shown, the other end of the second arc antenna segment 4 is connected to one end of the sixth straight antenna segment 9, and the other end of the sixth straight antenna segment 9 is connected to one end of the fourth arc antenna segment 10; the fourth arc antenna segment 10 is parallel to the second arc antenna segment 4.

[0059] The other end of the third arc-shaped antenna segment 8 is connected to the sixth straight line 9 antenna segment. Figure 8 The Bluetooth antenna in the PCB further increases the effective electrical length of the antenna, thereby improving the antenna gain.

[0060] like Fig.10 As shown, the other end of the fourth arc-shaped antenna segment 10 is connected to one end of the seventh straight line antenna segment 11 ; the seventh straight line antenna segment 11 is parallel to the second straight line antenna segment 3 .

[0061] The other end of the fourth arc-shaped antenna segment 10 is connected to the seventh straight antenna segment 11. Fig. 9 The Bluetooth antenna in the , further increases the effective electrical length of the antenna, thereby improving the antenna gain. Figures 11 to 13 As shown, they are Fig.10 The return loss, gain, and efficiency graph of the Bluetooth antenna in human tissue is shown. Figures 11 to 13 This is a comprehensive simulation image after the overall length of the Bluetooth antenna is increased by 6.6mm. Fig.11 It shows that the Bluetooth antenna has S11 < -12.78dB in the working frequency band. Fig. 9 The radiation efficiency of Bluetooth increases at the resonance point. Fig.12 This indicates that the gain of the Bluetooth antenna at a specific frequency is 7.13i, compared to Fig. 9 The gain is high and the radiation is outstanding. Fig.13 This shows that the total efficiency of Bluetooth antenna through the skin remains above 2.84%. Fig. 9 The Bluetooth antenna has been improved by 0.3%.

[0062] like Fig.14 As shown, the other end of the seventh straight antenna segment 11 is connected to one end of the fifth arc-shaped antenna segment 12 ; the fifth arc-shaped antenna segment 12 is parallel to the first arc-shaped antenna segment 2 .

[0063] The other end of the seventh linear antenna segment 11 is connected to the fifth arc-shaped antenna segment 12. Fig.13 The Bluetooth antenna in the PCB further increases the effective electrical length of the antenna, thereby improving the antenna gain.

[0064] like Fig.15 As shown, the other end of the fifth arc-shaped antenna segment 12 is connected to the vertical eighth linear antenna segment 13 ; the eighth linear antenna segment 13 is parallel to the first linear antenna segment 1 .

[0065] The other end of the fifth arc-shaped antenna segment 12 is connected to the eighth straight antenna segment 13. Fig.14 The Bluetooth antenna in the PCB further increases the effective electrical length of the antenna, thereby improving the antenna gain.

[0066] In actual operation, the size and position of the Bluetooth antenna can be adjusted to adjust the resonant frequency and bandwidth generated by the Bluetooth antenna in the communication frequency band (for example, 2.4GHz-2.48GHz) to adapt to different communication needs and changes in the human tissue environment; specifically, Fig.16 A schematic diagram of a flow chart of a resonance adjustment method of a Bluetooth antenna provided in an embodiment of the present application; Fig.16 As shown, the method includes:

[0067] Step 1610: Create a human body model in the CST software to simulate the working condition of the Bluetooth antenna in the human body.

[0068] CST software, full name CST Studio Suite, is a high-performance 3D electromagnetic simulation software package developed by CST of Germany. The software integrates multiple electromagnetic field solvers for designing, analyzing and optimizing electromagnetic (EM) components and systems, and is widely used in the field of electromagnetic field simulation.

[0069] CST software plays a major role in the design and analysis of Bluetooth antennas. It can model and simulate Bluetooth antennas and design Bluetooth antennas of different structures. It supports 3D electromagnetic field simulation, can accurately simulate and analyze the return loss (S11) of the antenna, calculate the gain and directional pattern of the antenna, evaluate the radiation characteristics of the antenna at different frequencies, and optimize the design. There is a more accurate human body model in the software. After the Bluetooth antenna is implanted in the human body, the size of the Bluetooth antenna in the human body, the dielectric spacing, etc. can be adjusted through parameter scanning and optimization functions to further optimize the return loss (S11).

[0070] like Fig.17 As shown in the figure, a human body model is established in the CST software; Fig.18 As shown, the human body model in CST simulates the working conditions of the Bluetooth antenna in the human body.

[0071] like Fig.17 As shown in the figure, the process of establishing a human body model is as follows: first, the built-in human body model is called in the CST software. The human body simulation structure 3D is considered to use a simplified version of the structure because the original complete structure is complex; the implantation reference point is located on the outside of the skin, and the antenna implantation depth moves 8mm downward along the w axis. The entire upper left chest part, including skin, fat, heart, and pectoral muscle, has an implantation depth of 8mm; then, the materials of each part of the implant are configured. The implant is divided into Bluetooth antenna, epoxy resin antenna cap, PCB motherboard, copper foil, and shell from top to bottom. Material parameter configuration is an important condition for establishing the model. The parameter configuration table is shown in Table 1 below; then, the parameters of various parts of the human body are configured, mainly the electrical parameters of the human body tissue, and the configuration results are shown in Table 2 below; after the parameter configuration is completed, the boundary conditions and excitation ports are assigned through the software, as shown in Fig. 22The design position of the excitation port is shown; finally, set the solution method and sweep mode, and select the command to start simulation in the software. After the simulation is completed in the software, CST will pop up the S11 parameters and gain curve, and the data can be analyzed.

[0072] The solved model and software interface are as follows Fig. 22 As shown in the figure, after adding the human body simulation model Fig.18 shown.

[0073]

[0074] Table 1

[0075]

[0076] Table 2

[0077] Step 1620: Adjust the size and position of the Bluetooth antenna to adjust the resonance generated by the Bluetooth antenna in the Bluetooth communication frequency band.

[0078] Among them, Fig.19 As shown, the height of the Bluetooth antenna can be reduced by 5 mm; and the length of the Bluetooth antenna can be reduced by 6.6 mm.

[0079] After adjusting the resonant frequency and bandwidth of the Bluetooth antenna in the communication frequency band (for example: 2.4GHz-2.48GHz), the Bluetooth antenna can also be evaluated. Specifically, Fig. 20 As shown, the evaluation method includes the following steps 2010 and 2020:

[0080] Step 2010: Perform human tissue simulation using CST software to determine the absorption of radiation from the Bluetooth antenna by the human tissue.

[0081] Among them, Fig. 20 As shown in FIG. 1 , it is the simulation result of the human body of the Bluetooth antenna. According to the simulation result, the absorption of the radiation of the Bluetooth antenna by the human body tissue can be known.

[0082] Step 2020: Evaluate and optimize the stability and reliability of the Bluetooth antenna based on the absorption of the radiation of the Bluetooth antenna by human tissue.

[0083] Among them, Fig.21 As shown in the figure, the stability and reliability of the Bluetooth antenna can be evaluated and optimized according to the absorption of the radiation of the Bluetooth antenna by the human tissue; generally, the higher the absorption rate of the Bluetooth antenna by the human tissue, the worse the stability and reliability of the Bluetooth antenna; the lower the absorption rate, the better the stability and reliability of the antenna. Through experimental tests simulating the human tissue environment, the long-term stability and reliability of the antenna are evaluated and optimized to ensure that the antenna can work stably for a long time after being implanted in the human body.

[0084] like Fig.21 As shown in the figure, taking 2.5GHz as an example, the simulation results are explained. The allowed input power limit of 1g is 15.92mW, which is completely higher than the input power required by the device (1mW). When the input power is 1mW, the MAX 1g-avg SAR of the structure is about 0.1W / kg, which is much smaller than the safety standard limit (1.6W / kg).

[0085] In the manufacturing process of the antenna, the edges of the antenna can be rounded to avoid sharp corners from causing damage to human tissue. The processing accuracy and cleanliness are strictly controlled to prevent impurities or pollutants from remaining and causing harm to the human body.

[0086] An implantable medical device Bluetooth antenna provided in an embodiment of the present application is precisely simulated and designed by CST software. It can still maintain a high gain in the complex electromagnetic environment of the human body, effectively improving the data transmission distance and reliability between the implantable device and the external Bluetooth device, and helping to achieve remote and accurate monitoring and medical intervention of the patient's health status. The coplanar waveguide feeding and matching network design are adopted to achieve good impedance matching, reduce energy loss during signal transmission, improve communication efficiency, reduce the power consumption requirements of the implantable device, and extend battery life. The meandering structure (1 / 2 square structure) and bandwidth extension design enable the antenna to adapt to changes in the Bluetooth communication frequency band and the influence of human tissue on the signal, ensuring the stability and continuity of communication. The selection of materials and structural design with good biocompatibility ensure the safety and long-term stability of the antenna inside the human body, reduce adverse reactions and complications caused by implanted antennas, and improve the safety and comfort of patients.

[0087] The above is only a specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art who is familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed by the present invention, which should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope of the claims.

Claims

1. An implantable medical device Bluetooth antenna, characterized in that: include: A vertical first straight antenna segment, the upper end of which is connected to one end of a first arc-shaped antenna segment; the other end of the first arc-shaped antenna segment is connected to one end of a horizontal second straight antenna segment, and the other end of the second straight antenna segment is connected to one end of a second arc-shaped antenna segment; the Bluetooth antenna is packaged for implantation in a human body; the Bluetooth antenna adopts a coplanar waveguide feeding method, and the transmission line of the Bluetooth antenna and the ground plane are located in the same plane; the feeding line of the Bluetooth antenna includes an impedance matching network, and the impedance matching network includes a capacitor connected in series with the Bluetooth antenna and an inductor connected in parallel with the Bluetooth antenna; the inductor is grounded, and the capacitor is connected to a circuit board; the ground plane is a shell that encapsulates the Bluetooth antenna.

2. The implantable medical device Bluetooth antenna according to claim 1, characterized in that: The length of the first straight antenna segment is 2.58 mm; the length of the first arc antenna segment and the second arc antenna segment is 3.14 mm; the length of the second straight antenna segment is 3.2 mm; the line width of the feeder of the Bluetooth antenna is 0.38 mm; the inductance is 3 nH; the capacitance is 1 pF; the input impedance and output impedance of the Bluetooth antenna are 50 Ω.

3. The implantable medical device Bluetooth antenna according to claim 1, characterized in that: The other end of the second arc-shaped antenna segment is connected to one end of a vertical third linear antenna segment; the length of the third linear antenna segment is 1.5 mm.

4. The implantable medical device Bluetooth antenna according to claim 3, characterized in that: The other end of the third linear antenna segment is connected to one end of the fourth linear antenna segment; the other end of the fourth linear antenna segment is connected to one end of the vertical fifth linear antenna segment; the fifth linear antenna segment is parallel to the third linear antenna segment.

5. The implantable medical device Bluetooth antenna according to claim 4, characterized in that: The other end of the fifth straight antenna segment is connected to one end of the third arc-shaped antenna segment; the third arc-shaped antenna segment is parallel to the second arc-shaped antenna segment.

6. The implantable medical device Bluetooth antenna according to claim 1, characterized in that: The other end of the second arc-shaped antenna segment is connected to one end of the sixth straight-line antenna segment, and the other end of the sixth straight-line antenna segment is connected to one end of the fourth arc-shaped antenna segment; the fourth arc-shaped antenna segment is parallel to the second arc-shaped antenna segment.

7. The implantable medical device Bluetooth antenna according to claim 6, characterized in that: The other end of the fourth arc-shaped antenna segment is connected to one end of the seventh straight-line antenna segment; and the seventh straight-line antenna segment is parallel to the second straight-line antenna segment.

8. The implantable medical device Bluetooth antenna according to claim 7, characterized in that: The other end of the seventh straight antenna segment is connected to one end of the fifth arc-shaped antenna segment; the fifth arc-shaped antenna segment is parallel to the first arc-shaped antenna segment.

9. The implantable medical device Bluetooth antenna according to claim 8, characterized in that: The other end of the fifth arc-shaped antenna segment is connected to the vertical eighth straight line antenna segment; the eighth straight line antenna segment is parallel to the first straight line antenna segment.

10. A resonance adjustment method for an implantable medical device Bluetooth antenna according to any one of claims 1 to 9, characterized in that: include: A human body model was built in CST software to simulate the working conditions of the Bluetooth antenna in the human body; Adjusting the size and position of the Bluetooth antenna to adjust the resonance generated by the Bluetooth antenna in the Bluetooth communication frequency band; The adjusting the size and position of the Bluetooth antenna includes: lowering the height of the Bluetooth antenna by 5 mm; The length of the Bluetooth antenna is reduced by 6.6 mm.

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