Antenna and implantable medical device for installing the antenna

Abstract

The present invention discloses an antenna and an implantable medical device for wireless communication with the aid of the antenna. The medical device comprises: a device housing, a hybrid circuit, an antenna and a feed-through component. The antenna is designed to be a three-dimensional shape, which maximizes the radiation aperture of the antenna and reduces the two-dimensional area of ​​the antenna. The conductive shell is converted into a partial radiation component through coupling, thereby improving energy transmission efficiency and data transmission distance.

Description

Technical Field

[0001] The invention relates to an antenna which can be packaged in an implantable medical device and connected to a hybrid circuit of the implantable medical device through a feed-through component to achieve far-field communication between the implantable medical device and an in vitro remote device, and is suitable for medical instruments and clinical fields. Background Art

[0002] Implantable medical devices (implants) are widely available to provide diagnostic or therapeutic capabilities. Three types of active implantable products, including implantable cardioverter defibrillators (ICDs), implantable cardiac monitors (ICMs), implantable pacemakers (Cardiac Pacemakers), leadless implantable pacemakers, subcutaneous implantable cardioverter defibrillators (SICDs), and various tissue, organ, and nerve stimulators or sensors, generally require doctors or professionals to use an external programmer to achieve wireless communication with the implant stimulator to complete data transmission, implant software upgrades, emergency stop and other possible functions. The purpose of the present invention is to solve the efficiency and quality of wireless communication, improve the efficiency of wireless transmission, and avoid communication problems or failures.

[0003] The traditional communication method uses inductive near-field coupling to perform wireless communication at a distance of several centimeters. The disadvantages of this method are: the communication distance is too short, the usage is limited and the data rate is low, which is generally thousands or tens of kilobits.

[0004] With the advancement of technology, remote communication between implant circuits and external programmers and other remote control devices has become possible, and is increasingly being used in equipment control, data transmission, and real-time monitoring. Implants and external devices can communicate at a distance of several meters. As one of the hardware foundations of communication, the implanted antenna is placed in the connector outside the shell, which ensures that the energy radiated by the antenna is not absorbed by the metal shell and is conducted to the maximum extent.

[0005] As circuits and structures become more integrated and miniaturized, the physical space of antennas is limited. Generally speaking, the communication distance is related to the radiation efficiency / gain of the antenna, the transmission power of the transmitting antenna, and the sensitivity of the receiving antenna. The efficiency / gain of the antenna is positively correlated with the size of the antenna. In order to maximize the antenna efficiency and increase the maximum transmission distance, designers have proposed various solutions. For example, modify the communication frequency and decoding method so that the system has better sensitivity to the signal under the same hardware conditions; or try to design an antenna with better directionality in the hope of achieving better efficiency in a certain direction; or add a matching network to achieve smaller return loss and better radiation efficiency, which can achieve a longer transmission distance at a specific frequency. These methods are usually undesirable because they either deviate from the communication frequency band allowed by the implant in the regulations in actual situations, or require additional requirements during surgery, or it is difficult to maintain the stability of communication in a changing environment, and increase the number of devices required.

[0006] Generally speaking, in order to achieve a relatively ideal antenna efficiency, the total length of the antenna needs to be at least one quarter to one half of a wavelength. Reducing the antenna length will reduce the radiation impedance of the antenna, making it more difficult to match the antenna with the source end and to couple with the air impedance, thereby significantly reducing the antenna efficiency. This example proposes a solution to increase the effective radiation efficiency of the antenna. The antenna is bent multiple times in three-dimensional space and coupled with the shell to obtain better radiation capability. Summary of the invention

[0007] The present invention provides an antenna, which includes three parts. The first part is a bending section, which is in the same plane and has an S-shape or a gate-shape. The S-shaped bending section is a smooth curve, and the gate-shaped bending section is bent by two right angles; the second part is an arc segment, which connects the first part and the third part, and the plane where the arc segment of the second part is located is perpendicular to the plane where the bending section of the third part is located; the third part is a bending section or a plane segment in the same plane, and the plane where the bending section or the plane segment is located is perpendicular to the plane where the bending section of the first part is located.

[0008] The antenna is for MICS microwave communication, and the operating frequency is MICS 402MHz to 405MHz.

[0009] The antenna is a monopole antenna without a dual structure and a single feed point structure.

[0010] The bending section of the antenna includes a vertical Z-shape, multiple consecutive vertical Z-shapes, a horizontal Z-shape, multiple consecutive horizontal Z-shapes, a horizontal trapezoid, multiple consecutive horizontal trapezoids, a vertical trapezoid, multiple consecutive vertical trapezoids, a horizontal W-shape, multiple consecutive horizontal W-shapes, a vertical W-shape, and multiple consecutive vertical W-shapes.

[0011] The arc segment of the first part of the antenna is perpendicular to the plane where the arc segment of the second part is located, and the arc segment of the second part is parallel to the long side of the gate-shaped bending section of the first part.

[0012] The end of the antenna bending section is connected to the main device through an integral structure formed by connecting an arc section and a plane section.

[0013] The present invention discloses an implantable medical device, which consists of four parts: a device housing, a hybrid circuit, an antenna and a feed-through component. The antenna includes three parts. The first part is a bending section, which is in the same plane and has an S-shape or a gate-shape. The S-shaped bending section is a smooth curve, and the gate-shaped bending section is bent by two right angles. The second part is an arc segment, which connects the first part with the third part, and the plane where the arc segment of the second part is located is perpendicular to the plane where the bending section of the third part is located. The third part is a bending section or a plane segment in the same plane, and the plane where the bending section or the plane segment is located is perpendicular to the plane where the bending section of the first part is located.

[0014] The antenna of the medical device is connected to the medical device body through a feed-through component, and the antenna is packaged inside the feed-through component.

[0015] The radiation part of the implant medical device is composed of an antenna body and an implant shell.

[0016] The implantable medical device comprises a hybrid circuit module, which comprises a radio frequency antenna, a radio frequency chip and corresponding software configuration, wherein the radio frequency part of the implant comprises an antenna debugging chip.

[0017] The antenna of the medical device is connected to the main body of the medical device through an integral structure formed by connecting a circular arc segment and a plane segment.

[0018] The edge line of the medical device is parallel to the plane where the bent section in the first part of the antenna is located.

[0019] The antenna of the medical device is folded for the last time at the bottom parallel to the housing.

[0020] The present invention discloses an implantable medical device capable of transmitting signals to an external remote device via an antenna. In some examples, the implantable medical device can automatically trigger the sensing of ECG signal parameters inside the heart, for example, without a trigger input initiated from an external source, such as based on a request initiated from a patient or by a doctor from an external device, and at least partially based on one or more physiological parameters of the patient, and transmit the sensed physiological parameters to an exogenous far-field device. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of the three-dimensional structure of the first antenna (the first part is in the shape of an S-shaped segment, and the third part is in the shape of a single vertical trapezoidal segment).

[0022] Figure 2 It is a schematic diagram of the three-dimensional structure of the second antenna (the first part is in the shape of an S-shaped segment, and the third part is in the shape of a plane segment).

[0023] Figure 3 It is a schematic diagram of the three-dimensional structure of the third type of antenna (the first part is in the shape of a gate-shaped segment, and the third part is in the shape of a plane segment).

[0024] Figure 4 It is a schematic diagram of the three-dimensional structure of the fourth type of antenna (the first part is shaped like a gate-shaped segment, and the third part is shaped like a single vertical trapezoidal segment).

[0025] Figure 5 This is a schematic diagram of the appearance structure of an implantable medical device and the relative positions of its components in the heart when it is implanted inside the heart.

[0026] Figure 6 Bit Figure 1 The schematic diagram of the relative position structure of the antenna installed on the implantable medical device ICD is shown.

[0027] Figure 7 For Figure 2 Schematic diagram of the structure of the position of the antenna installed in the implantable medical device ICD as seen from the direction of the middle arrow T.

[0028] Figure 8 for Figure 3 Schematic diagram of the position and structure of the antenna installed in the implantable medical device ICD.

[0029] exist Figure 1 , Figure 2 , Figure 3 and Figure 4 In the figure, the antenna is divided into three parts by dotted lines, namely, a first part, a second part and a third part. Antennas in different dotted boxes in the figure represent different parts of the antenna. The antenna parts enclosed in each dotted box belong to a common part and do not represent a plane.

[0030] Figure 7 and Figure 8 The middle dotted line represents the plane where the dotted frame is located. Every four dotted lines form a dotted frame. One dotted frame is located in one plane. The three dotted frames in the figure represent the three planes where the three dotted frames are located. These three planes are perpendicular to each other. Figure 7 and Figure 8 The planes in (plane I, plane II and plane III) are parallel.

[0031] Figure 1 , Figure 2 , Figure 3 and Figure 4 The antennas of the four structures shown in the figure all include three parts. The difference between the antenna structures is only in the shape of the bent parts of the first and third parts. The shape of the bent section of the first part of the antenna can be S-shaped or gate-shaped. The shape of the bent section of the third part of the antenna can be a flat section or a trapezoidal section. In actual operation, the bent section of the third part of the antenna can be designed as Figure 2 In addition to the vertical trapezoid shown, it can also be designed as a vertical Z-shape, a plurality of continuous vertical Z-shapes, a horizontal Z-shape, a plurality of continuous horizontal Z-shapes, a horizontal trapezoid, a plurality of continuous horizontal trapezoids, a plurality of continuous vertical trapezoids, a horizontal W-shape, a plurality of continuous horizontal W-shapes, a vertical W-shape, a plurality of continuous vertical W-shapes, or a combination thereof. However, it is necessary to ensure that the bending sections of the various shapes are parallel to the plane I on which they are located. DETAILED DESCRIPTION

[0032] The antenna of the present invention is a monopole antenna without a dual structure and a single feed point structure. The biggest feature of the monopole antenna is that it can provide satisfactory radiation characteristics over a wide frequency band, and it also has many advantages such as simple structure, light weight, simple feeding structure, easy analysis, and good omnidirectional characteristics. The raw material of the antenna can be copper plate or tin-plated steel plate. The working principle of the antenna is MICS microwave communication, and the antenna works at a frequency from MICS 402MHz to MICS 405MHz. The effective radiation efficiency of the antenna is increased by high frequency, and better radiation capability is obtained by multiple bending in three-dimensional space. The antenna can be packaged in implantable cardioverter defibrillators, implantable heart monitors, implantable pacemakers, leadless implantable pacemakers, subcutaneous implantable cardioverter defibrillators, and various tissues, organs and neural stimulators or sensors and other implantable medical devices, wherein the relative position structural diagram of the antenna installed to the implantable cardioverter defibrillator ICD is shown in Figure 6 , Figure 7 and Figure 8 . A schematic diagram of the appearance structure of an implantable medical device and the relative positions of its components in the heart when implanted in the heart is shown in Figure 5 .

[0033] Figure 1 Schematic diagram of the three-dimensional structure of the first antenna (the first part is an S-shaped segment, and the third part is a single vertical trapezoidal segment). Figure 1 The antenna nodes are marked in the order of A, B, C', D', E, and F from one end to the other. The antenna consists of three parts. The first part includes the part from A to B, which is a smooth S-shaped section. The shape of the first part of the antenna can be designed as Figure 1In addition to the S-shaped segment AB shown in FIG, it can also be designed as Figure 3 or Figure 4 The gate-shaped segment ab shown in FIG. Figure 7 This is a schematic diagram of the relative position structure of the first antenna installed on the implantable medical device ICD. Figure 7 The three planes marked by the dotted lines, namely plane I, plane II and plane III, are perpendicular to each other. The S-shaped section of the first part of the antenna is parallel to plane III. The second part is an arc segment BC', and the plane where the arc segment BC' is located is parallel to plane II. The third part is a vertical trapezoidal bending segment C'D' in the same plane, and the plane where the trapezoidal bending segment C'D' is located is parallel to plane I. The arc segment of the second part connects the first part with the third part, and the plane where the bending section of the second part is located is perpendicular to the plane where the bending section of the third part is located and the plane where the arc segment of the first part is located. The overall structure formed by the connection of the arc segment D'E and the plane segment EF realizes the connection between the antenna and the main body of the medical device.

[0034] Figure 2 It is a schematic diagram of the three-dimensional structure of the second antenna (the first part is in the shape of an S-shaped segment, and the third part is in the shape of a plane segment). Figure 2 and Figure 1 The difference between the antennas lies only in the shape of the bend in the third section. Figure 2 The antenna is marked with letters A, B, C, D, E, and F from one end to the other. The antenna consists of three parts. The first part includes the part from A to B, which is a smooth S-shaped section. The shape of the first part of the antenna can be designed as Figure 1 In addition to the S-shaped segment AB shown in FIG, it can also be designed as Figure 3 or Figure 4 The gate-shaped segment ab is shown in the figure. The second part of the antenna is an arc segment BC, and the plane where the arc segment BC is located is parallel to plane II. The third part of the antenna is a vertical trapezoidal bending segment CD in the same plane. The arc segment BC of the second part connects the first part with the third part, and the plane where the bending segment of the second part is located is perpendicular to the plane where the bending segment of the third part is located and the plane where the arc segment of the first part is located. Figure 1 The antenna is the same, and the overall structure formed by connecting the arc segment DE and the plane segment EF realizes the connection between the antenna and the main body of the medical device.

[0035] Figure 3 It is a schematic diagram of the three-dimensional structure of the third type of antenna (the first part is in the shape of a gate-shaped segment, and the third part is in the shape of a plane segment). Figure 3 and Figure 2 The difference between the antennas lies only in the shape of the bend in the first section. Figure 3The antenna is marked with some nodes from one end to the other in the order of letters a, b, c, d, e, and f. The first part of the antenna is a gate-shaped segment. Figure 8 for Figure 3 The schematic diagram of the relative position structure of the antenna installed on the implantable medical device ICD is shown. Figure 8 The three planes marked by the dotted lines, namely plane I, plane II and plane III, are perpendicular to each other. The second part is an arc segment bc, combined with Figure 8 The plane where the arc segment bc is located is parallel to plane II. The third part is a plane segment cd. The arc segment bc of the second part connects the first part with the third part, and the plane where the bending section of the second part is located is perpendicular to the plane where the bending section of the third part is located and the plane where the arc segment of the first part is located. Figure 1 and Figure 2 Similar to the antenna in the figure, the overall structure formed by connecting the arc segment de and the plane segment ef realizes the connection between the antenna and the main body of the medical device.

[0036] Figure 4 It is a schematic diagram of the three-dimensional structure of the fourth type of antenna (the first part is shaped like a gate-shaped segment, and the third part is shaped like a single vertical trapezoidal segment). Figure 4 and Figure 3 The difference between the antennas lies only in the shape of the bend in the third section. Figure 4 The antenna is marked with letters a, b, c', d', e, and f from one end to the other. The third part of the antenna is a plane segment cd. The arc segment bc of the second part of the antenna connects the first part with the third part, and the plane where the bending section of the second part is located is perpendicular to the plane where the bending section of the third part is located and the plane where the arc segment of the first part is located. Figure 1 and Figure 2 Similar to the antenna in the figure, the overall structure formed by connecting the arc segment de and the plane segment ef realizes the connection between the antenna and the main body of the medical device.

[0037] The antenna is connected to the internal circuit board of the implanted medical device through an integral structure composed of a circular arc segment and a plane segment, so as to realize the far-field communication between the implanted medical device and the external remote device. The antenna should be encapsulated inside the implanted medical device. Since the length of the antenna is positively correlated with the sensitivity of the antenna to transmit and receive signals, the length of the antenna should be as long as possible to enhance the signal transmission sensitivity of the antenna. The width and thickness of the antenna can be appropriately adjusted according to the applicable implanted medical device. The width and thickness of the antenna should be determined according to the fixing method. The antenna of the present invention can be fixed by appropriately widening any one or several sections on the antenna main structure and selecting an appropriate method. Common fixing methods of the antenna include: mechanical structure fixing by punching, glue bonding, bolt connection, welding, riveting, interference fit between the shaft and the hole, transition fit between the shaft and the hole, clearance fit, key connection and then tightening with threads, etc. The antenna of the present invention can also widen any section on the main body, and punch holes on the widened section surface, the number of holes is 0 to 10, the hole size can be adjusted in combination with the size of the specific medical device, and the holes of the antenna are used to fix the antenna in the ICD head. The fixing method can be selected through glue bonding, bolt connection, welding, riveting, interference fit between the shaft and the hole, transition fit between the shaft and the hole, clearance fit, key connection and then tightening with threads, etc.

[0038] Implantable medical devices (implants) are commonly used to provide diagnostic or therapeutic capabilities. Three types of active implantable products, including implantable cardiac defibrillators, implantable heart monitors, implantable pacemakers, leadless implantable pacemakers, subcutaneous implantable cardiac defibrillators, and various tissue, organ and nerve stimulators or sensors, generally require doctors or professionals to use an external programmer to achieve wireless communication with the implant stimulator to complete data transmission, implant software upgrades, emergency stop and other possible functions. This embodiment takes ICD as an example to illustrate the working scheme of the antenna in an implantable medical device.

[0039] Figure 5 Schematic diagram of the appearance structure of ICD100 and the relative positions of its components in the heart when implanted in the heart. ICD consists of four parts: device housing 105, hybrid circuit in the device housing, antenna and feedthrough assembly. The antenna is encapsulated in the feedthrough assembly of the ICD head structure 107, and the feedthrough assembly not only encapsulates the antenna feedthrough, but also the wire feedthrough. See the wire feedthrough Figure 5In the ICD head structure, the wire feedthrough is connected to the wire 115, and the ICD main circuit board is connected to the heart through the antenna to sense the ECG signal parameters or perform treatment by clicking. The inside of the device shell usually includes a power supply, a capacitor, and a hybrid circuit, and the hybrid circuit is usually implemented by a chip through program coding. The function of the ICD can be realized in two ways. One is the automatic regulation inside the ICD body, which does not require manual triggering and control and can be realized automatically. The other is to send a communication signal 185 through an external program-controlled device 190. The external program-controlled device of the ICD is generally a program controller, a patient assistant or other device that can issue instructions to it or sense its internal signals. The communication method between the ICD and the external program-controlled device 190 can be one or more of wired communication, Bluetooth, WIFI, LTE or CDMA and other wireless communication networks. Figure 5 The ICD lead 115 shown is a single lead, and may also be a double lead, a triple lead, or a quad lead during clinical use. The basic structure of the lead is similar to that of the lead 115. The lead 115 is composed of a coil 118, an electrode 120A, and an electrode 120B. The coil 118 is connected to the ICD body through a connector 107. The function of the coil is to achieve the purpose of sensing or treatment through discharge. The electrode 120A and the electrode 120B sense the signal parameters of the cardiac event. The electrode 120B is also called a spiral head, and contains a spiral coil inside. The electrode spiral 120A on the lead is rotated and wound inside the insulating material outside the lead before use. It can be unscrewed from the other end of the lead before implantation into the human heart, so that the electrode end 120A of the lead is fixed to the myocardial tissue inside the heart. The electrode lead needs to be coated with insulating materials such as silicone, polyurethane or epoxy resin.

[0040] Figure 6 for Figure 1The schematic diagram of the relative position structure of the antenna installed in the implantable medical device ICD is shown. The antenna is connected to the main body of the medical device through an integral structure formed by connecting a circular arc segment DE and a plane segment EF. 602 is the device shell of the medical device, and the device shell contains a hybrid circuit to complete the sensing and communication functions of the implanted device to the electrocardiographic parameters. A feedthrough component is encapsulated in the head of the ICD, and the feedthrough component includes an antenna feedthrough and a wire feedthrough. The antenna feedthrough is a component that connects the antenna and the device body. One end of the antenna 606 is connected to the internal circuit board of the device body through the antenna feedthrough through the part 618, and 618 is the interface where the antenna is connected to the medical device ICD, and the interface is sealed by a circular isolation sheet. 604 is a wire coil, and usually a medical device contains 1 to 5 wire coils 604. The wire coil 604 is separated from the main body of the medical device and can be wound at intervals on a shaft fixed to the head of the ICD, and the shaft is fixed to the head of the ICD through the fixed part 610. 612 is a fixing structure located at the fixing part 610, and the fixing part 610 is fixed to the ICD head. 610 is a fixing part, and the fixing methods include: mechanical structure fixing, glue bonding, bolt connection, welding, riveting, interference fit between the shaft and the hole, transition fit between the shaft and the hole, clearance fit, key connection, and then tightening with threads, etc. The raw material of the wire 614 should be a conductor material with a conductive function. The antenna 606 is connected to the circuit board implanted inside the medical device, so that the antenna is connected to the circuit inside the device to play a wireless communication function. Each wire coil 604 is connected to the hybrid circuit inside the device housing 602 one by one through the wire 614. Usually, the coil of the wire connected to the hybrid circuit is designed to a fixed range area, so that all the wires can be packaged together. The hybrid circuit is located in the head of the medical device body, and the hybrid circuit coils are separated by a silicone insulator 608. A silicone insulator is designed between every two wire coils 604 to prevent the connection between the wires from causing a short circuit in the device. 620 is a ground wire, which grounds the circuit board inside the device to form a loop for wireless signal transmission. The ICD is connected to an in vitro programmer, and the in vitro programmer can be used to adjust and control the ICD parameters. The ICD contains a hybrid circuit module, which includes a radio frequency antenna, a radio frequency chip and corresponding software configuration.

[0041] Figure 7 For Figure 6Schematic diagram of the relative position structure of the antenna installed to the implantable medical device ICD, looking in the direction of the middle arrow T. The antenna 704 is folded for the last time below and parallel to the ICD device housing 712. The antenna 704 includes three parts. The plane III where the S-shaped section of the first part of the antenna is located is parallel to the edge line of the ICD head. The parallel part can convert the device housing 712 into a partial radiation component through coupling, so that the antenna 704 and the device housing 712 together constitute the radiation part of the implantable medical device, thereby improving the signal transmission efficiency. The material of the device housing 712 that is in direct contact with human tissue is generally selected from conductive metal titanium. Considering the conductive properties, non-corrosiveness, and compatibility, the material of the implantable medical device is generally titanium. The shaft of the ICD head contains four wire coils 710, and the wire coils 604 are separated by silicone insulators 706. The wire coils 710 and Figure 6 The wire coil 604 is the same as the insulator 706. Figure 6 The same as the middle insulator 608. Figure 6 The middle fixing structure 612 is the same, which is a fixing structure installed on the head of the ICD to fix the shaft body on the head of the implanted medical device ICD.

[0042] Figure 8 for Figure 3 The antenna is shown as a schematic diagram of the position and structure of the implantable medical device ICD. The antenna is connected to the main body of the medical device through an integral structure formed by connecting a circular arc segment de and a plane segment ef. 802 is the device shell of the medical device, and the device shell contains a hybrid circuit to complete the sensing and communication functions of the implanted device to the electrocardiogram parameters. A feedthrough component is encapsulated in the head of the ICD, and the feedthrough component includes an antenna feedthrough and a wire feedthrough. The antenna feedthrough is a component that connects the antenna and the device body. One end of the antenna 804 is connected to the internal circuit board of the device body through the antenna feedthrough through the interface, and the interface is sealed by a circular isolation sheet. 808 is a wire coil. Usually, a medical device contains 1 to 5 wire coils 808. Each wire coil 808 is separated by an insulator 806 to prevent the connection between the wires from causing a short circuit in the device. The wire coil 808 is separated from the main body of the medical device and can be wound around a shaft fixed to the head of the ICD at intervals. The shaft is fixed to the head of the ICD through a fixing portion 810. Each wire coil 808 is connected to the hybrid circuit inside the device housing 802 one by one through the wire. Usually, the coils of the wire connected to the hybrid circuit are designed to a fixed range area, which can save space and all wires are packaged together in a fixed space.

[0043] The present invention discloses a special-shaped antenna applicable to wireless communication of an implanted medical device. The present invention designs the antenna into a three-dimensional shape. The antenna of the medical device is folded for the last time below the shell in parallel with the shell. The parallel part can increase the capacitance between the antenna and the shell, and the shell can be converted into a partial radiation component through coupling, thereby maximizing the radiation aperture of the antenna, reducing the two-dimensional area of ​​the antenna, improving the radiation efficiency, and improving the energy transmission efficiency and the data transmission distance.

Claims

1. An antenna, characterized in that: The antenna includes three parts. The first part is a bending section, which is in the same plane and has an S-shape or a gate-shape. The S-shaped bending section is a smooth curve, and the gate-shaped bending section is bent by two right angles; the second part is an arc section, connecting the first part with the third part, and the plane where the arc section of the second part is located is perpendicular to the plane where the bending section of the third part is located; the third part is a bending section or a plane section in the same plane, and the plane where the bending section or the plane section is located is perpendicular to the plane where the bending section of the first part is located; the arc section of the first part of the antenna is perpendicular to the plane where the arc section of the second part is located, and the arc section of the second part is parallel to the long side of the gate-shaped bending section of the first part; the bending section of the first part is bent along the length direction of the antenna extension; the antenna is used for an implantable medical device, and the implantable medical device includes a device body, and one end of the antenna is connected to the internal circuit board of the device body; the plane where the bending section of the first part is located is parallel to the edge line of the head of the device body.

2. An antenna as claimed in claim 1, characterized in that: The antenna is for MICS microwave communication, and the operating frequency is MICS 402MHz to 405MHz.

3. An antenna as claimed in claim 2, characterized in that: The antenna is a monopole antenna without a dual structure and a single feed point structure.

4. An antenna as claimed in claim 3, characterized in that: The bending section of the antenna includes a vertical Z-shape, multiple consecutive vertical Z-shapes, a horizontal Z-shape, multiple consecutive horizontal Z-shapes, a horizontal trapezoid, multiple consecutive horizontal trapezoids, a vertical trapezoid, multiple consecutive vertical trapezoids, a horizontal W-shape, multiple consecutive horizontal W-shapes, a vertical W-shape, and multiple consecutive vertical W-shapes.

5. An antenna as claimed in claim 4, characterized in that: The end of the antenna bending section is connected to the main device through an integral structure formed by connecting an arc section and a plane section.

6. An implantable medical device, characterized in that: The medical device is composed of four parts: a device housing, a hybrid circuit, an antenna and a feed-through component. The antenna includes three parts. The first part is a bending section, which is in the same plane and has an S-shape or a gate-shape. The S-shaped bending section is a smooth curve, and the gate-shaped bending section is bent by two right angles; the second part is an arc section, which connects the first part with the third part, and the plane where the arc section of the second part is located is perpendicular to the plane where the bending section of the third part is located; the third part is a bending section or a plane section in the same plane, and the plane where the bending section or the plane section is located is perpendicular to the plane where the bending section of the first part is located; the arc section of the first part of the antenna is perpendicular to the plane where the arc section of the second part is located, and the arc section of the second part is parallel to the long side of the gate-shaped bending section in the first part; the S-shaped or gate-shaped bend of the first part is bent along the length direction of the antenna extension, one end of the antenna is connected to the internal circuit board of the medical device, and the edge line of the medical device is parallel to the plane where the bending section in the first part of the antenna is located.

7. An implantable medical device according to claim 6, characterized in that: The antenna of the medical device is connected to the medical device body through a feed-through component, and the antenna is packaged inside the feed-through component.

8. An implantable medical device according to claim 7, characterized in that: The radiation part of the implant medical device is composed of an antenna body and an implant shell.

9. An implantable medical device according to claim 8, characterized in that: The implantable medical device comprises a hybrid circuit module, which comprises a radio frequency antenna, a radio frequency chip and corresponding software configuration, wherein the radio frequency part of the implant comprises an antenna debugging chip.

10. An implantable medical device according to claim 6, characterized in that: The antenna of the medical device is connected to the main body of the medical device through an integral structure formed by connecting a circular arc segment and a plane segment.

11. An implantable medical device according to claim 10, characterized in that: The antenna of the medical device is folded for the last time at the bottom parallel to the housing.

Images