WO2019080945A1 - 一种天线、植入式医疗器械及植入式医疗系统 - Google Patents

一种天线、植入式医疗器械及植入式医疗系统

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Publication number
WO2019080945A1
WO2019080945A1 PCT/CN2018/115338 CN2018115338W WO2019080945A1 WO 2019080945 A1 WO2019080945 A1 WO 2019080945A1 CN 2018115338 W CN2018115338 W CN 2018115338W WO 2019080945 A1 WO2019080945 A1 WO 2019080945A1
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WO
WIPO (PCT)
Prior art keywords
antenna
medical device
implantable medical
pifa
implanted
Prior art date
Application number
PCT/CN2018/115338
Other languages
English (en)
French (fr)
Inventor
赵赫
朱为然
Original Assignee
苏州景昱医疗器械有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 苏州景昱医疗器械有限公司 filed Critical 苏州景昱医疗器械有限公司
Priority to GB2006952.2A priority Critical patent/GB2587252B/en
Publication of WO2019080945A1 publication Critical patent/WO2019080945A1/zh

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    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61N—ELECTROTHERAPY; MAGNETOTHERAPY; RADIATION THERAPY; ULTRASOUND THERAPY
    • A61N1/00—Electrotherapy; Circuits therefor
    • A61N1/18—Applying electric currents by contact electrodes
    • A61N1/32—Applying electric currents by contact electrodes alternating or intermittent currents
    • A61N1/36—Applying electric currents by contact electrodes alternating or intermittent currents for stimulation
    • A61N1/3605—Implantable neurostimulators for stimulating central or peripheral nerve system
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q1/00—Details of, or arrangements associated with, antennas
    • H01Q1/27—Adaptation for use in or on movable bodies
    • H01Q1/273—Adaptation for carrying or wearing by persons or animals
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61N—ELECTROTHERAPY; MAGNETOTHERAPY; RADIATION THERAPY; ULTRASOUND THERAPY
    • A61N1/00—Electrotherapy; Circuits therefor
    • A61N1/18—Applying electric currents by contact electrodes
    • A61N1/32—Applying electric currents by contact electrodes alternating or intermittent currents
    • A61N1/36—Applying electric currents by contact electrodes alternating or intermittent currents for stimulation
    • A61N1/362—Heart stimulators
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61N—ELECTROTHERAPY; MAGNETOTHERAPY; RADIATION THERAPY; ULTRASOUND THERAPY
    • A61N1/00—Electrotherapy; Circuits therefor
    • A61N1/18—Applying electric currents by contact electrodes
    • A61N1/32—Applying electric currents by contact electrodes alternating or intermittent currents
    • A61N1/36—Applying electric currents by contact electrodes alternating or intermittent currents for stimulation
    • A61N1/372—Arrangements in connection with the implantation of stimulators
    • A61N1/37211—Means for communicating with stimulators
    • A61N1/37217—Means for communicating with stimulators characterised by the communication link, e.g. acoustic or tactile
    • A61N1/37223—Circuits for electromagnetic coupling
    • A61N1/37229—Shape or location of the implanted or external antenna
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61N—ELECTROTHERAPY; MAGNETOTHERAPY; RADIATION THERAPY; ULTRASOUND THERAPY
    • A61N1/00—Electrotherapy; Circuits therefor
    • A61N1/18—Applying electric currents by contact electrodes
    • A61N1/32—Applying electric currents by contact electrodes alternating or intermittent currents
    • A61N1/38—Applying electric currents by contact electrodes alternating or intermittent currents for producing shock effects
    • A61N1/39—Heart defibrillators
    • A61N1/3956—Implantable devices for applying electric shocks to the heart, e.g. for cardioversion
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q1/00—Details of, or arrangements associated with, antennas
    • H01Q1/12—Supports; Mounting means
    • H01Q1/22—Supports; Mounting means by structural association with other equipment or articles
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q1/00—Details of, or arrangements associated with, antennas
    • H01Q1/36—Structural form of radiating elements, e.g. cone, spiral, umbrella; Particular materials used therewith
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q1/00—Details of, or arrangements associated with, antennas
    • H01Q1/50—Structural association of antennas with earthing switches, lead-in devices or lightning protectors
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q9/00—Electrically-short antennas having dimensions not more than twice the operating wavelength and consisting of conductive active radiating elements
    • H01Q9/04—Resonant antennas
    • H01Q9/30—Resonant antennas with feed to end of elongated active element, e.g. unipole
    • H01Q9/42—Resonant antennas with feed to end of elongated active element, e.g. unipole with folded element, the folded parts being spaced apart a small fraction of the operating wavelength
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61N—ELECTROTHERAPY; MAGNETOTHERAPY; RADIATION THERAPY; ULTRASOUND THERAPY
    • A61N1/00—Electrotherapy; Circuits therefor
    • A61N1/18—Applying electric currents by contact electrodes
    • A61N1/32—Applying electric currents by contact electrodes alternating or intermittent currents
    • A61N1/36—Applying electric currents by contact electrodes alternating or intermittent currents for stimulation
    • A61N1/3605—Implantable neurostimulators for stimulating central or peripheral nerve system
    • A61N1/36125—Details of circuitry or electric components
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61N—ELECTROTHERAPY; MAGNETOTHERAPY; RADIATION THERAPY; ULTRASOUND THERAPY
    • A61N1/00—Electrotherapy; Circuits therefor
    • A61N1/18—Applying electric currents by contact electrodes
    • A61N1/32—Applying electric currents by contact electrodes alternating or intermittent currents
    • A61N1/38—Applying electric currents by contact electrodes alternating or intermittent currents for producing shock effects
    • A61N1/39—Heart defibrillators
    • A61N1/3968—Constructional arrangements, e.g. casings
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q1/00—Details of, or arrangements associated with, antennas
    • H01Q1/36—Structural form of radiating elements, e.g. cone, spiral, umbrella; Particular materials used therewith
    • H01Q1/38—Structural form of radiating elements, e.g. cone, spiral, umbrella; Particular materials used therewith formed by a conductive layer on an insulating support

Definitions

  • the invention belongs to the field of implanted medical devices, in particular to a PIFA antenna of the MICS band, an implanted medical device with a PIFA antenna of the MICS band, and an implantable medical system.
  • the implantable medical system generally consists of two parts: an implantable medical device and an external programmable device.
  • the data exchange between the implanted medical device and the external device control device is a two-way wireless data transmission.
  • the external device control device needs to send the program control command to the implanted medical device on the one hand, and the implanted medical device on the other hand. Feedback information and measurement diagnostic information sent by the device.
  • the external program control device includes a doctor program controller and a patient program controller.
  • the patient program controller is a device for the patient to control the switch according to his or her own situation or to mediate the implantable medical device in the body, and the patient can usually only adjust within the mediation range set by the doctor.
  • the doctor monitors the device for adjusting the implanted medical device in the body according to the patient's condition.
  • a doctor program controller can control a plurality of implantable medical devices. Communication between patient programmers, doctor programmers, and implantable medical devices relies on antennas.
  • the larger size of the antenna of the existing implantable medical device is not conducive to implantation in the body, and the mismatch with the circuit board (PCB) leads to low radiation efficiency, which leads to lower transmission efficiency of the implanted antenna which is inherently depleted in human tissue. .
  • PCB circuit board
  • the object of the present invention is to provide a PIFA antenna for use in the MICS band of an implantable medical device, an implanted medical device having a PIFA antenna of the MICS band, and an implantable medical system, on the one hand, to make the implantable medical device more It is miniaturized, on the other hand, it enables higher efficiency and longer distance communication with external program-controlled devices.
  • a PIFA antenna applied to a MICS band implanted in a medical device comprising an antenna body and a PCB dielectric substrate, wherein the antenna body is suspended on an upper layer of the PCB dielectric substrate
  • the antenna body comprises an antenna radiating unit, a short circuit point, a feeding point, a first line segment connecting the short circuit point and the feeding point respectively, and the feeding point is connected to the antenna radiating unit.
  • the antenna radiating unit is an inverted "F" type antenna PIFA.
  • the antenna body is linear, rounded, stepped or curved, or a combination thereof in the longitudinal direction.
  • the antenna body is linear, rounded, stepped or curved, or a combination thereof in the width direction.
  • the antenna body further includes a feeding wire, one end of the feeding wire is connected to the feeding point, and the other end is connected to the PCB dielectric substrate through the feedthrough connector.
  • the feeding wire is one or more of a feeding platinum wire, a feeding copper wire, and a feeding silver wire.
  • the length of the feeding point to the end of the antenna radiating unit is one eighth to one quarter of the wavelength of the human medium in the MICS band.
  • an implantable medical device comprising a housing 4, a PCB dielectric substrate, a battery, and a top cover portion sealingly connected to the outer casing 4, the outer casing 4 having a sealed cavity, a PCB dielectric substrate And the battery is disposed inside the sealed cavity, the top cover portion includes a PIFA antenna, and the PIFA antenna is the PIFA antenna of claim 1 for any of the MICS bands implanted in the medical device.
  • the cap portion further includes a sealing filler, and the sealing filler is a biocompatible material epoxy resin.
  • the implantable medical device further includes an electrode wire connector disposed in the cap portion, and the PIFA antenna applied to the MICS band of the implanted medical device is disposed above the electrode wire connector, spaced apart from the electrode wire connector Settings.
  • the implantable medical device further includes an insulating bracket disposed in the top cover member, the insulating bracket includes an antenna seating surface, a shape of the antenna seating surface, and an antenna body of the PIFA antenna applied to the MICS band implanted in the medical device Corresponding to the shape, the antenna body is attached to the antenna mounting surface and supported by the insulating bracket.
  • the antenna mounting surface of the insulating bracket further has a plurality of protruding positioning fins for defining a PIFA antenna applied to the MICS frequency band of the implanted medical device at a fixed position of the antenna mounting surface.
  • the present invention still further discloses an implantable medical system comprising an extracorporeal controller and an implant electrode, further comprising a front implantable medical device, and the extracorporeal controller comprising a wireless communication module for wirelessly communicating with the PIFA antenna.
  • the external controller is a doctor program controller or a patient program controller.
  • the antenna, the implantable medical device and the implantable medical system of the invention adopt the PIFA antenna structure prototype, and the equivalent antenna size is monopolar compared to the single pole point of the monopole antenna.
  • the sub-antenna is twice as large as the existing monopole antenna, and the radiation efficiency is doubled, thereby realizing the miniaturization of the implantable medical device;
  • the optimal feature of the structure of the present invention is that the characteristic impedance can be
  • the RF front-end circuit of the PCB achieves excellent impedance matching, which eliminates the RF front-end matching circuit in the prior art, thereby eliminating the loss of the part of the circuit, solving the mismatch loss of the monopole antenna, thereby realizing its Higher efficiency, longer distance communication with in vitro programmed devices.
  • FIG. 1 is a schematic structural view of a PIFA antenna applied to an MICS frequency band of an implanted medical device according to Embodiment 1 of the present invention
  • FIG. 2 is a schematic structural view of an implantable medical device having a PIFA antenna having a MICS frequency band according to Embodiment 1 of the present invention
  • FIG. 3 is a diagram showing a callback loss curve of a PIFA antenna applied to a MICS band of an implanted medical device according to Embodiment 1 of the present invention
  • FIG. 4 is a radiation pattern in a horizontal direction of a PIFA antenna applied to a MICS band of an implanted medical device according to Embodiment 1 of the present invention
  • FIG. 5 is a radiation pattern of a vertical direction of a PIFA antenna applied to a MICS band of an implanted medical device according to Embodiment 1 of the present invention
  • FIG. 6 is a schematic structural view of an implantable medical device having a PIFA antenna with a MICS frequency band according to Embodiment 2 of the present invention
  • FIG. 7 is a schematic structural view of an implantable medical device having a PIFA antenna of a MICS band according to Embodiment 3 of the present invention.
  • a PIFA antenna for use in an MICS band implanted in a medical device includes an antenna body and a PCB dielectric substrate, and the antenna body is suspended on an upper layer of the PCB dielectric substrate.
  • the antenna body comprises an antenna radiating unit 9, a short-circuit point 5, a feeding point 7, a first line segment 8 connecting the short-circuit point 5 and the feeding point 7 at both ends, and the feeding point 7 is connected to the antenna radiating unit 9.
  • the length from the feeding point 7 to the end of the antenna radiating unit is one eighth to one quarter of the wavelength of the body medium of the MICS band.
  • the antenna radiating unit 9 is an inverted "F" type antenna PIFA.
  • the antenna body has a straight line, a rounded curve, a stepped curve or a curved surface or a combination thereof in the longitudinal direction (x direction); at the same time, the antenna body is straight, curved, stepped or curved in the width direction (y direction) or Curved surfaces or combinations thereof.
  • the x, y, and z to be described below constitute a three-dimensional coordinate system.
  • the projection of the antenna body on the xy plane in this embodiment includes a plurality of sections, and the plurality of sections are connected end to end and arranged in the y direction in sequence, each section having a curved curved structure.
  • the plurality of sections are at least three, and each section has an arc-shaped or U-shaped curved curve structure.
  • the projection of the antenna body on the xz plane has a plurality of stepped linear structures.
  • the antenna body has a step main body structure, and the step main body structure includes a first step surface 1, a second step surface 2, and a third step surface 3 which are both parallel to the xy plane and whose height is sequentially decreased.
  • the step main body structure further includes a connection portion. A first connecting surface of the stepped surface 1 and the second stepped surface 2, and a second connecting surface connecting the second stepped surface 2 and the third stepped surface 3, the first connecting surface and the second connecting surface are both parallel to the yz surface.
  • the length of the first step surface 1 in the x direction is 14 mm ⁇ 0.5
  • the length of the second step surface 2 in the x direction is 8 ⁇ 0.5 mm
  • the length of the third step surface 3 in the x direction is 5.6 ⁇ 0.5
  • Mm the height of the first joint surface in the y direction is 3.2 ⁇ 0.5 mm
  • the height of the second joint surface in the y direction is 2.1 ⁇ 0.5 mm.
  • the first line segment 8 includes a first segment 81, a second segment 82, and a third segment 83 that are sequentially connected end to end.
  • the first segment 81 is in the shape of an arc in the third stepped surface 3
  • the second segment 82 is in the second connecting surface
  • the third segment 83 is in the second stepped surface 2.
  • the antenna radiating unit 9 includes a segment 91, a second segment 92, a third segment 93, a fourth segment 94, a fifth segment 95, a sixth segment 96, and a seventh segment 97. Eight paragraphs 98.
  • the two segments 92 and the six segments 96 are U-shaped or curved and are in the first step surface 1
  • the four segments 94 and the eight segments 98 are U-shaped or curved and are in the second step surface 2
  • the segment 93, the fifth segment 95, and the seventh segment 97 are all in the first connecting surface
  • the segment 91, the third segment 93, the fifth segment 95, and the seventh segment 97 are disposed in parallel and are parallel to the second segment 82 of the first line segment 8 described above.
  • the antenna body further includes a feed wire 6, the upper end of the feed wire being connected to the feed point 7, and the other end being connected to the PCB dielectric substrate by a feedthrough connector.
  • the material of the feed wire 6 is preferably one or more of a feed platinum wire, a feed copper wire, and a feed silver wire.
  • the embodiment further provides an implantable medical device, as shown in FIG. 2, which comprises a housing 4, a PCB dielectric substrate, a battery, and a top cover portion (not shown in the drawing) sealed to the outer casing 4,
  • the outer casing 4 has a sealed cavity
  • the PCB dielectric substrate and the battery are disposed inside the sealed cavity
  • the top cover portion includes a PIFA antenna
  • the PIFA antenna is the above-mentioned PIFA antenna applied to the MICS frequency band of the implanted medical device
  • the PIFA antenna A feed wire 6 is connected which passes through the outer casing 4 to the interior of the sealed cavity and is connected by a feedthrough connector to a PCB dielectric substrate located inside the sealed cavity.
  • the cap portion further includes a seal filler and the seal filler is a biocompatible material epoxy.
  • the epoxy resin is not only biocompatible, but also has a high dielectric constant and low electromagnetic loss.
  • the implantable medical device further includes an electrode wire connector disposed within the cap portion, and the PIFA antenna applied to the MICS band of the implanted medical device is disposed above the electrode wire connector and spaced apart from the electrode wire connector.
  • the implantable medical device further includes an insulating bracket disposed in the top cover member, the insulating bracket includes an antenna seating surface, and the shape of the antenna seating surface is applied to the implanted medical device.
  • the shape of the antenna body of the PIFA antenna of the MICS band corresponds to the antenna body and the antenna placement surface are attached and supported by the insulating bracket.
  • the antenna mounting surface of the insulating bracket further has a plurality of protruding positioning fins for fixing the PIFA antenna applied to the MICS frequency band of the implanted medical device on the antenna mounting surface.
  • the implantable medical device in this embodiment is an implantable pulse generator.
  • the pulse generator is connected to the electrode to transmit the pulse generated by the pulse generator to the electrode, and the pulse signal generated by the pulse generator is transmitted from the electrode to a specific nerve target for electrical stimulation, thereby restoring the human body function to a normal working state. .
  • the PIFA antenna structure designed by the present invention can support the frequency range of 380-435 MHz, and the impedance matching at 405 MHz is better, and the return loss value is about -24.2967 dB.
  • the radiation pattern of the PIFA antenna structure designed by the present invention in the horizontal direction has a gain of -30.0529 dB in the horizontal direction of -60 degrees, 0 degrees and 60 degrees, respectively. -27.6376dB, -30.1839dB, so the PIFA antenna structure designed by the present invention has better radiation performance in the horizontal direction -60 degrees to 60 degrees, so that the antenna performance can be more easily passed through the throughput certification.
  • the radiation pattern of the PIFA antenna structure designed by the present invention in the vertical direction has a gain of -26.8424 dB in the vertical direction of -60 degrees, 0 degrees and 60 degrees, respectively, - 27.6376dB and -28.4540DB, so the antenna has better radiation performance in the horizontal range of -60 degrees to 60 degrees, making the antenna performance easier to pass the throughput certification.
  • the embodiment further provides an implantable medical system comprising a doctor program controller or/and a patient/programmer, an implanted electrode, the above-mentioned implanted medical device having a PIFA antenna with a MICS band, a doctor program controller or a patient program control
  • the instrument includes a wireless communication module for wirelessly communicating with the PIFA antenna.
  • the implantable medical system described above is an implantable cardiac electrical stimulation system, an implantable neuroelectric stimulation system, an implantable heart rate defibrillation system, or an implantable drug delivery system.
  • the implantable nerve electrical stimulation system is an implanted deep brain electrical stimulation system, an implanted cortical electrical stimulation system, an implanted spinal cord electrical stimulation system, an implantable radial nerve electrical stimulation system or an implantable Vagus nerve electrical stimulation system. It should be noted that the technical solution is applicable to all existing related implantable medical systems, and is not limited to the above listed contents.
  • the PIFA antenna applied to the MICS band of the implanted medical device in this embodiment differs from the first embodiment only in that the antenna radiating unit 9 in this embodiment is in a planar inverted “F” shape.
  • the first segment 81 of a line segment 8 includes a U-bend and is in the same plane as the antenna radiating element 9, and the second segment 82 of the first line segment 8 is vertically connected downwardly to the shorting point.
  • the implantable medical device in this embodiment differs from the first embodiment only in that the PIFA antenna is the PIFA antenna used in the MICS band of the implanted medical device in the embodiment.
  • the implantable medical system in this embodiment differs from the first embodiment only in that it uses the implantable medical device of the present embodiment.
  • the PIFA antenna applied to the MICS band of the implanted medical device is different from the first embodiment only in that the antenna radiating unit 9 in this embodiment is in an inverted "F" shape.
  • a plurality of U-shaped curved tails are connected, the first segment 81 of the first line segment 8 comprises two U-shaped bends, and is in the same plane as the antenna radiating element 9, and the second segment 82 of the first line segment 8 is vertically connected downward Short circuit point.
  • the implantable medical device in this embodiment differs from the first embodiment only in that the PIFA antenna is the PIFA antenna used in the MICS band of the implanted medical device in the embodiment.
  • the implantable medical system in this embodiment differs from the first embodiment only in that it uses the implantable medical device of the present embodiment.
  • the invention relates to an antenna, an implantable medical device and an implantable medical system, which adopts a prototype of a PIFA antenna structure, and has an equivalent antenna size twice that of a monopole antenna compared with a single ground point of a monopole antenna. Compared with the existing monopole antenna, the size is reduced by half, and the radiation efficiency is doubled, thereby realizing the miniaturization of the implantable medical device; the optimal feature of the structure of the present invention is that the characteristic impedance can be matched with the RF front-end circuit of the PCB.

Abstract

本发明公开了一种天线、植入式医疗器械及植入式医疗系统。一种应用于植入式医疗器械的天线，包括天线本体和PCB介质基板，天线本体悬空处于PCB介质基板的上层，天线本体包括天线辐射单元、短路点、馈电点、两端分别连接短路点和馈电点的第一线路段，馈电点连接天线辐射单元。一种植入式医疗器械，具有上述的MICS频段的PIFA天线。一种植入式医疗系统，包括上述的植入式医疗器械。本发明使植入式医疗器械更具小型化，使其与体外程控设备实现更高效率、更远距离的通信。

Description

一种天线、植入式医疗器械及植入式医疗系统
相关申请
本申请请求2017年10月27日提交的名称为“一种天线、植入式医疗器械及植入式医疗系统”、申请号为201711021393.4的中国专利申请以及2017年11月16日提交的名称为“一种天线、植入式医疗器械及植入式医疗系统”、申请号为201711138063.3的权益和优先权，由此以引用方式全部并入本文中。
技术领域
本发明属于植入医疗器械领域，尤其涉及一种MICS频段的PIFA天线、具有该MICS频段的PIFA天线的植入医疗器械以及植入式医疗系统。
背景技术
植入式医疗系统一般由植入式医疗器械、体外程控设备两部分组成。植入式医疗器械和体外程控设备之间的数据交换是一种双向的无线数据传输，体外程控设备一方面需要将程控指令发送给植入式医疗器械，另一方面又要接收植入式医疗器械发送的反馈信息和测量诊断信息。体外程控设备包括医生程控器和病人程控器。其中，病人程控器是为病人配备的用来根据自身的情况控制开关或者调解体内植入式医疗器械的装置，病人通常仅能够在医生设置的调解范围内进行调节。医生程控器时医生用来根据病人情况监控调节体内植入式医疗器械的装置，通常一个医生程控器可以控制多个植入式医疗器械。病人程控器、医生程控器、植入式医疗器械之间的通信依赖于天线。
现有植入式医疗器械的天线尺寸较大不利于植入体内，与电路板(PCB板)失配导致辐射效率不高，进而导致本来就有人体组织损耗的植入式天线传输效 率更低。
发明内容
本发明的目的在于提出一种应用于植入式医疗器械的MICS频段的PIFA天线、具有该MICS频段的PIFA天线的植入医疗器械以及植入式医疗系统，一方面使植入式医疗器械更具小型化，另一方面使其与体外程控设备实现更高效率、更远距离的通信。
为了达到上述目的，本发明提供了一种技术方案：一种应用于植入医疗器械的MICS频段的PIFA天线，包括天线本体和PCB介质基板，其特征在于：天线本体悬空处于PCB介质基板的上层，天线本体包括天线辐射单元、短路点、馈电点、两端分别连接短路点和馈电点的第一线路段，馈电点连接天线辐射单元。
进一步地，天线辐射单元为倒“F”型天线PIFA。、
进一步地，天线本体在长度方向上呈直线、圆滑弯曲、台阶状弯曲或曲面弯曲或者其组合。
进一步地，天线本体在宽度方向上呈直线、圆滑弯曲、台阶状弯曲或曲面弯曲或者其组合。
进一步地，天线本体还包括馈电金属丝，馈电金属丝一端与馈电点相连接，另一端通过馈通连接器连接PCB介质基板。
进一步地，馈电金属丝为馈电铂金丝、馈电铜丝、馈电银丝中一种或者多种。
进一步地，馈电点到天线辐射单元末端的长度为MICS频段人体介质波长的八分之一至四分之一。
本发明还提供了另一种技术方案：一种植入式医疗器械，包括外壳4、PCB介质基板、电池、与外壳4相密封连接的顶盖部分，外壳4具有一密封腔体，PCB介质基板以及电池均设置于密封腔体的内部，顶盖部分包括PIFA天线，PIFA天线为权利要求1-任一项应用于植入医疗器械的MICS频段的PIFA天线。
进一步地，顶盖部分还包括密封填充物，密封填充物为生物相容性材料环氧树脂。
进一步地，植入式医疗器械进一步包括设置在该顶盖部分内的电极线连接器，应用于植入医疗器械的MICS频段的PIFA天线设置在电极线连接器的上方，与电极线连接器间隔设置。
进一步地，植入式医疗器械进一步包括一设置在该顶盖部件中的绝缘支架，绝缘支架包括天线安置面，天线安置面的形状与应用于植入医疗器械的MICS频段的PIFA天线的天线本体形状对应，天线本体与天线安置面贴合并通过绝缘支架支撑。
进一步地，该绝缘支架的天线安置面上还具有多个突出的定位鳍，用于将应用于植入医疗器械的MICS频段的PIFA天线限定在该天线安置面的固定位置。
本发明还进一步公开了一种植入式医疗系统，包括体外控制器和植入电极，还包括如前面植入式医疗器械，且体外控制器包括用于与PIFA天线无线通信的无线通信模块。
进一步的，体外控制器为医生程控仪或病人程控仪。
通过采用上述技术方案，本发明一种天线、植入式医疗器械及植入式医疗系统，采用PIFA天线结构原型，相比于单极子天线多一个接地点，其等效天线尺寸是单极子天线的两倍，相较现有的单极子天线尺寸缩小一半，辐射效率提 高一倍，从而实现了使植入式医疗器械更加小型化；本发明结构的最优特点是其特征阻抗可以与PCB的射频前端电路实现很佳的阻抗匹配，可省去现有技术中的射频前端匹配电路，因此消除了此部分电路的损耗，解决了单极子天线的失配损耗，从而实现了其与体外程控设备之间更高效率、更远距离的通信。
上述说明仅是本发明技术方案的概述，为了能够更清楚了解本发明的技术手段，并可依照说明书的内容予以实施，以下以本发明的较佳实施例并配合附图详细说明如后。
附图说明
附图1为本发明实施例一中应用于植入医疗器械的MICS频段的PIFA天线的结构示意图；
附图2为本发明实施例一中具有MICS频段的PIFA天线的植入式医疗器械的结构示意图；
附图3为本发明实施例一中应用于植入医疗器械的MICS频段的PIFA天线的回拨损耗曲线图；
附图4为本发明实施例一中应用于植入医疗器械的MICS频段的PIFA天线水平方向的辐射方向图；
附图5为本发明实施例一中应用于植入医疗器械的MICS频段的PIFA天线垂直方向的辐射方向图；
附图6为本发明实施例二中的具有MICS频段的PIFA天线的植入式医疗器械的结构示意图；
附图7为本发明实施例三中的具有MICS频段的PIFA天线的植入式医疗器械的结构示意图。
图中标号为：
1、第一台阶面；2、第二台阶面；3、第三台阶面；4、外壳；5、短路点；6、馈电金属丝；7、馈电点；8、第一线路段；81、第一段；82、第二段；83、第三段；9、天线辐射单元；91、一段；92、二段；93、三段；94、四段；95、五段；96、六段；97、七段。
具体实施方式
下面结合附图和实施例，对本发明的具体实施方式作进一步详细描述。以下实施例用于说明本发明，但不用来限制本发明的范围。
实施例一
参照附图1，本实施例中的一种应用于植入医疗器械的MICS频段的PIFA天线，包括天线本体和PCB介质基板，天线本体悬空处于PCB介质基板的上层。
天线本体包括天线辐射单元9、短路点5、馈电点7、两端分别连接短路点5和馈电点7的第一线路段8，馈电点7连接天线辐射单元9。本实施例中，馈电点7到天线辐射单元末端的长度为MICS频段人体介质波长的八分之一至四分之一。
天线辐射单元9为倒“F”型天线PIFA。天线本体在长度方向(x方向)上呈直线、圆滑弯曲、台阶状弯曲或曲面弯曲或者其组合；同时所述的天线本体在宽度方向(y方向)上呈直线、圆滑弯曲、台阶状弯曲或曲面弯曲或者其组合。
下面将要描述的x、y、z构成三维坐标系。
本实施例中的天线本体在xy面上的投影包括多个部段，多个部段首尾相连并在y方向上依次排布，每个部段呈弯曲的曲线结构。本实施例中，上述的多个部段至少有三个，每个部段呈弧形或者U形的弯曲曲线结构。
天线本体在xz面上的投影呈多个台阶状线性结构。具体地，天线本体呈台阶主体结构，该台阶主体结构包括均平行于xy面且高度依次递减的第一台阶面1、第二台阶面2、第三台阶面3，台阶主体结构还包括连接第一台阶面1和第二台阶面2的第一连接面、连接第二台阶面2和第三台阶面3的第二连接面，第一连接面和第二连接面均平行于yz面。本实施例中，第一台阶面1在x方向的长度为14mm±0.5，第二台阶面2在x方向的长度为8±0.5mm，第三台阶面3在x方向的长度为5.6±0.5mm，第一连接面在y方向的高度为3.2±0.5mm，第二连接面在y方向的高度为2.1±0.5mm。以上所描述的台阶主体结构通过机械冲压形成。
如附图1所示的本实施例中，上述的第一线路段8包括首尾依次连接的第一段81、第二段82、第三段83。其中，第一段81处于第三台阶面3，呈弧形，第二段82处于第二连接面，第三段83处于第二台阶面2。
如附图1所示的本实施例中，上述的天线辐射单元9包括首尾依次连接的一段91、二段92、三段93、四段94、五段95、六段96、七段97、八段98。其中，二段92和六段96均呈U形或弧形并处于第一台阶面1，四段94和八段98均呈U形或弧形并处于第二台阶面2，一段91、三段93、五段95、七段97均处于第一连接面，一段91、三段93、五段95、七段97平行设置，并与上述第一线路段8的第二段82相平行。
在一种更为优选的实施方案中，天线本体还包括馈电金属丝6，馈电金属丝的位于上方的一端与馈电点7相连接，另一端通过馈通连接器连接PCB介质基板。馈电金属丝6的材质优选为馈电铂金丝、馈电铜丝、馈电银丝中一种或者多种。
本实施例还提供了一种植入式医疗器械，如附图2所示，它包括外壳4、PCB 介质基板、电池、与外壳4相密封连接的顶盖部分(附图中未画出)，外壳4具有一密封腔体，PCB介质基板以及电池均设置于密封腔体的内部，顶盖部分包括PIFA天线，PIFA天线为上述的应用于植入医疗器械的MICS频段的PIFA天线，该PIFA天线连接馈电金属丝6，该馈电金属丝6穿过外壳4至密封腔体的内部并通过馈通连接器连接到位于密封腔体内部的PCB介质基板。
在一种更为优选的实施方案中，顶盖部分还包括密封填充物，密封填充物为生物相容性材料环氧树脂。这种环氧树脂不但具有生物相容性，且具有高介电常数，低电磁损耗的特点，这些特点都有利于实现植入式天线的小型化与高效率。
植入式医疗器械还包括设置在该顶盖部分内的电极线连接器，应用于植入医疗器械的MICS频段的PIFA天线设置在电极线连接器的上方并与电极线连接器间隔设置。
在一种更为优选的实施方案中，植入式医疗器械还包括一设置在该顶盖部件中的绝缘支架，绝缘支架包括天线安置面，天线安置面的形状与应用于植入医疗器械的MICS频段的PIFA天线的天线本体的形状对应，天线本体与天线安置面贴合并通过绝缘支架支撑。优选地，绝缘支架的天线安置面上还具有多个突出的定位鳍，用于将应用于植入医疗器械的MICS频段的PIFA天线固定在该天线安置面上。
本实施例中的植入式医疗器械为植入式脉冲发生器。脉冲发生器与电极相连接，从而将脉冲发生器所产生的脉冲传输到电极，脉冲发生器产生的脉冲信号由电极传输至特定神经靶点进行电刺激，从而使人体机能恢复到正常运作的状态。
如附图3所示的本实施例中，通过本发明设计得到的PIFA天线结构能够支 持覆盖380-435MHz频段范围，在405MHz频点阻抗匹配情况较好，回波损耗值约为-24.2967dB。
如附图4所示的本实施例中，本发明设计得到的PIFA天线结构在水平方向上的辐射方向图，在水平方向-60度，0度和60度方向增益分别为--30.0529dB，-27.6376dB，-30.1839dB，因此本发明设计得到的PIFA天线结构在水平方向-60度至60度角度范围内辐射性能较好，使得天线性能能够更容易通过吞吐量认证。
如附图5所示的本实施例中，本发明设计得到的PIFA天线结构在垂直方向上的辐射方向图，在垂直方向-60度，0度和60度方向增益分别为-26.8424dB，-27.6376dB和-28.4540DB，因此天线在这-60度至60度这个水平方向角度范围内辐射性能较好，使得天线性能能够更容易通过吞吐量认证。
本实施例还提供了一种植入式医疗系统，包括医生程控仪或/和病人/程控仪、植入电极、上述的具有MICS频段的PIFA天线的植入式医疗器械，医生程控仪或病人程控仪包括用于与PIFA天线无线通信的无线通信模块。
根据实际所治疗的病症不同，上述的植入式医疗系统为植入式心脏电刺激系统、植入式神经电刺激系统、植入式心率转复除颤系统或植入式药物输送系统。更进一步地，植入式神经电刺激系统为植入式脑深部电刺激系统、植入式脑皮层电刺激系统、植入式脊髓电刺激系统、植入式骶神经电刺激系统或植入式迷走神经电刺激系统。需要说明的是，本技术方案适用于现有的所有的相关植入式医疗系统，并不局限于上述所列出的内容。
实施例二
请参阅图6，本实施例中的应用于植入医疗器械的MICS频段的PIFA天线，其与实施例一的区别仅在于：本实施例中的天线辐射单元9成平面倒“F”型，第一线路段8的第一段81包含一个U型弯曲，且与天线辐射单元9在处于同一 平面，第一线路段8的第二段82垂直向下连接短路点。
本实施例中的植入式医疗器械，与实施例一的区别仅在于：其中的PIFA天线采用的是本实施例中的应用于植入医疗器械的MICS频段的PIFA天线。
本实施例中的植入式医疗系统，与实施例一的区别仅在于：其采用本实施例中的植入式医疗器械。
实施例三
请参阅图7，本实施例中的应用于植入医疗器械的MICS频段的PIFA天线，其与实施例一的区别仅在于：本实施例中的天线辐射单元9成平面倒“F”型，有多个U型弯曲尾相连，第一线路段8的第一段81包含两个U型弯曲，且与天线辐射单元9在处于同一平面，第一线路段8的第二段82垂直向下连接短路点。
本实施例中的植入式医疗器械，与实施例一的区别仅在于：其中的PIFA天线采用的是本实施例中的应用于植入医疗器械的MICS频段的PIFA天线。
本实施例中的植入式医疗系统，与实施例一的区别仅在于：其采用本实施例中的植入式医疗器械。
本发明一种天线、植入式医疗器械及植入式医疗系统，采用PIFA天线结构原型，相比于单极子天线多一个接地点，其等效天线尺寸是单极子天线的两倍，相较现有的单极子天线尺寸缩小一半，辐射效率提高一倍，从而实现了使植入式医疗器械更加小型化；本发明结构的最优特点是其特征阻抗可以与PCB的射频前端电路实现很佳的阻抗匹配，可省去现有技术中的射频前端匹配电路，因此消除了此部分电路的损耗，解决了单极子天线的失配损耗，从而实现了其与体外程控设备之间更高效率、更远距离的通信。
以上所述仅是本发明的优选实施方式，并不用于限制本发明，应当指出， 对于本技术领域的普通技术人员来说，在不脱离本发明技术原理的前提下，还可以做出若干改进和变型，这些改进和变型也应视为本发明的保护范围。

Claims (15)

  1. 一种应用于植入医疗器械的MICS频段的PIFA天线，包括天线本体和PCB介质基板，其特征在于：所述的天线本体悬空处于所述PCB介质基板的上层，所述天线本体包括天线辐射单元(9)、短路点(5)、馈电点(7)、两端分别连接所述短路点(5)和馈电点(7)的第一线路段(8)，所述的馈电点(7)连接天线辐射单元(9)。
  2. 根据权利要求1所述的应用于植入医疗器械的MICS频段的PIFA天线，其特征在于：所述的天线辐射单元(9)为倒“F”型天线PIFA。、
  3. 根据权利要求2所述的应用于植入医疗器械的MICS频段的PIFA天线，其特征在于：所述的天线本体在长度方向上呈直线、圆滑弯曲、台阶状弯曲或其组合。
  4. 根据权利要求3任一条所述的应用于植入医疗器械的MICS频段的PIFA天线，其特征在于：所述的天线本体在宽度方向上呈直线、圆滑弯曲、台阶状弯曲或曲面弯曲或者其组合。
  5. 根据权利要求1-4任一条所述的应用于植入医疗器械的MICS频段的PIFA天线，其特征在于：所述的天线本体还包括馈电金属丝(6)，所述的馈电金属丝一端与馈电点(7)相连接，另一端通过馈通连接器连接所述PCB介质基板。
  6. 根据权利要求5所述的应用于植入医疗器械的MICS频段的PIFA天线，其特征在于：所述的馈电金属丝(6)为馈电铂金丝、馈电铜丝、馈电银丝中一种或者多种。
  7. 根据权利要求5所述的应用于植入医疗器械的MICS频段的PIFA天线，其特征在于：所述的馈电点(7)到天线辐射单元末端的长度为MICS频段人体介质波长的八分之一至四分之一。
  8. 一种植入式医疗器械，包括外壳(4)、PCB介质基板、电池、与所述外壳(4) 相密封连接的顶盖部分，所述的外壳(4)具有一密封腔体，所述PCB介质基板以及电池均设置于所述密封腔体的内部，其特征在于：所述的顶盖部分包括PIFA天线，所述的PIFA天线为权利要求1-7任一项所述的应用于植入医疗器械的MICS频段的PIFA天线。
  9. 根据权利要求8所述的植入式医疗器械，其特征在于，所述的PIFA天线连接馈电金属丝(6)，该馈电金属丝(6)穿过所述外壳(4)至所述密封腔体的内部并通过馈通连接器连接到位于密封腔体内部的PCB介质基板。
  10. 根据权利要求8所述的植入式医疗器械，其特征在于：所述的顶盖部分还包括密封填充物，所述的密封填充物为生物相容性材料环氧树脂。
  11. 根据权利要求8所述的植入式医疗器械，其特征在于：进一步包括设置在该顶盖部分内的电极线连接器，所述的应用于植入医疗器械的MICS频段的PIFA天线设置在所述的电极线连接器的上方并与所述的电极线连接器间隔设置。
  12. 根据权利要求8所述的植入式医疗器械，其特征在于：进一步包括一设置在该顶盖部件中的绝缘支架，所述绝缘支架包括天线安置面，所述天线安置面的形状与所述应用于植入医疗器械的MICS频段的PIFA天线的天线本体形状对应，所述天线本体与所述天线安置面贴合并通过所述绝缘支架支撑。
  13. 根据权利要求12所述的植入式医疗器械，其特征在于：该绝缘支架的天线安置面上还具有多个突出的定位鳍，用于将所述应用于植入医疗器械的MICS频段的PIFA天线固定在该天线安置面上。
  14. 一种植入式医疗系统，包括体外控制器和植入电极，其特征在于：还包括权利要求8至13任一条所述的植入式医疗器械，且所述的体外控制器包括用于与所述PIFA天线无线通信的无线通信模块。
  15. 根据权利要求14所述的植入式医疗系统，其特征在于：所述的体外控制器 为医生程控仪或病人程控仪。
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