CN104577315A - Novel stack-based planar inverted-F antenna applied to human body implantable equipment - Google Patents
Novel stack-based planar inverted-F antenna applied to human body implantable equipment Download PDFInfo
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- CN104577315A CN104577315A CN201410787833.7A CN201410787833A CN104577315A CN 104577315 A CN104577315 A CN 104577315A CN 201410787833 A CN201410787833 A CN 201410787833A CN 104577315 A CN104577315 A CN 104577315A
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Abstract
The invention discloses a novel stack-based planar inverted-F antenna applied to human body implantable equipment. The novel stack-based planar inverted-F antenna adopts a cylindrical structure, and comprises a double-layered radiation patch structure, a coaxial feeding structure and a biologically compatible coating structure; the double-layered radiation patch structure comprises an upper spiral radiation metal patch layer, a lower spiral radiation metal patch layer and a metal floor; the lower spiral radiation metal patch layer is connected with the metal floor through a cylindrical short circuit probe; the coaxial feeding structure comprises a 50 Ohm coaxial cable; the inner core of the coaxial cable is connected with the upper spiral radiation metal patch layer and the lower spiral radiation metal patch layer respectively. The novel stack-based planar inverted-F antenna is small in size, low in section, high in gain, biologically compatible, and the like.
Description
Technical field
The invention belongs to biomedical telemetry field, be specifically related to a kind of novel stack planar inverted-F antenna being applied to human body implantable devices.
Background technology
In recent years, along with the development of tele-medicine telemetry, human body implantable devices becomes a study hotspot gradually.Human body implantable devices refers to the electronic equipment in implant into body or animal body, such as cardiac pacemaker, artificial cochlea, cranial nerve stimulator, animal tag etc.By human body implanting device, collector soma information, for prevention from suffering from the diseases, medical diagnosis on disease and disease treatment are offered help, also can provide comfortable real-time monitoring for patient simultaneously.Most important in tele-medicine telemetry system is exactly the radio communication situation of implantable biomedical devices and external base station, and it will affect the accuracy of whole system information transmission.Only have system to obtain tissue information accurately, doctor just can carry out corresponding therapeutic treatment to patient.Implantable devices and external base station set up the design that one of reliable communication links key technology is implantable antenna.The exploitation of implantable antenna is different from our antenna equipment of ordinary use, the biological tissue that human body is different by various shape, electromagnetic property is different is formed, and, heterogeneously there is consumption dispersive medium in most of biological tissue, the electric parameters such as the conductivity of these tissues and dielectric constant are different along with the change of frequency, temperature, institutional framework and water content etc., the body of these characteristics and human body complexity together constitutes the boundary condition of antenna electric wave traveling, increases the difficulty of Antenna Design.Simultaneously except considering that human body electromagnetic property is on except the impact of antenna performance, also must consider the biocompatibility of implantable antenna, the factors such as miniaturization and fail safe.
Planar inverted-F antenna (Planar Inverted-F Antenna, PIFA) is developed by linear inverse-F antenna (IFA), gains the name because of the English alphabet F of a shape picture mirror writing of whole antenna.The basic structure of PIFA antenna be employing planar radiating element as radiant body, and using a large ground as reflecting surface, radiant body has the pin that two are adjacent to each other, is respectively used to ground connection and feed.It has the series of advantages such as size is little, lightweight, section is low, bandwidth, efficiency are high, gain is high.
It is be specifically designed to short-distance wireless biomedical applications that communication service frequency range (MICS frequency range: 402-405MHz) is implanted in medical treatment.This frequency range is managed by FCC (FCC) and the European Radio Communications committee (ERC).Adopt MICS frequency range, electromagnetic decay in human body can be reduced, realize setting up reliable wireless communication link between implanting device and external base station, meanwhile, the miniaturization of antenna can be realized.
Summary of the invention
In order to overcome the deficiency that prior art exists, the invention provides a kind of novel stack planar inverted-F antenna being applied to human body implantable devices.
The present invention adopts following technical scheme:
A kind of novel stack planar inverted-F antenna being applied to human body implantable devices, be specially cylindrical structural, comprise double-deck radiation patch structure, coaxial feed and bio-compatible coating structure, described double-deck radiation patch structure is made up of upper strata spiral radiation metal patch, lower floor's spiral radiation metal patch and metal floor, described lower floor spiral radiation metal patch is connected with metal floor, described coaxial feed is made up of the coaxial cable of 50 Ω, and described coaxial cable inner core is connected with upper strata spiral radiation metal patch and lower floor's spiral radiation metal patch respectively.
Described upper strata spiral radiation metal patch and lower floor's spiral radiation metal patch adopt vertical stacking to place, and become mirror image.
Described bio-compatible coating structure is made up of the plated film wrapping up whole antenna, and the thickness of described plated film is 0.2mm.
The radius of described cylindrical structural is 4.5mm, and thickness is 1.27mm.
Described upper strata spiral radiation metal patch and lower floor's spiral radiation metal patch are printed on medium substrate respectively, and the radius of described medium substrate is 4.5mm, and thickness is 0.635mm.
Described coaxial cable inner core radius is 0.3mm.
Described lower floor spiral radiation metal patch is connected with metal floor especially by cylindrical grounding probe.
The radius of described cylindrical grounding probe is 0.2mm, and length is 1.27mm.
Beneficial effect of the present invention:
(1) Antenna Design is cylindrical structural, and compared to common square structure, its size is less, be beneficial to the Miniaturization Design of antenna, meanwhile, because this antenna is applied to human body implantable devices, circular configuration avoids the damage of acute angle to tissue of square structure;
(2) antenna adopts stack plane inverse-F structure, and compare and traditional plane inverse-F structure, antenna is compacter, extends the Net long wave radiation current length of antenna simultaneously, reduces the size of antenna, is more conducive to application and human body implantable devices;
(3) the radiation metal paster of upper and lower two specular adopts helical structure, just can regulate antenna resonant frequency by the radius of adjustable screw ring and width;
(4) adopt biocompatible material to carry out coating film treatment to view picture antenna, reduce electromagnetic coupled, reduce the rejection of human body, the insulating properties characteristic of plated film has isolated radiation patch and the contact biological tissue with conductive features simultaneously;
(5) novel stack planar inverted-F antenna has miniaturization, low section, high-gain, the features such as bio-compatible.
Accompanying drawing explanation
Fig. 1 (a) is metal floor structural representation of the present invention;
Fig. 1 (b) is lower floor of the present invention spiral radiation metal patch structural representation;
Fig. 1 (c) is upper strata of the present invention spiral radiation metal patch structural representation;
Fig. 1 (d) is end view of the present invention;
Fig. 2 is the reflection coefficient analogous diagram of the present invention on three layers of manikin;
Fig. 3 is overall structure schematic diagram of the present invention.
Embodiment
Below in conjunction with embodiment and accompanying drawing, the present invention is described in further detail, but embodiments of the present invention are not limited thereto.
Embodiment
As shown in Fig. 1 (a) ~ 1 (d) and Fig. 3, a kind of novel stack planar inverted-F antenna being applied to human body implantable devices, is specially cylindrical structural, a similar coin, and its radius R is 4.5mm, and thickness H is 1.27mm.
Described double-deck radiation patch structure is made up of upper strata spiral radiation metal patch, lower floor's spiral radiation metal patch and metal floor 1, described upper strata spiral radiation metal patch and lower floor's spiral radiation metal patch become specular, described metal floor is positioned at bottom, described lower floor spiral radiation metal patch is connected with the metal floor 1 of bottom by cylindrical grounding probe 3, described upper and lower helical layer radiation metal paster 4,6 is printed on medium substrate 5,7 respectively, and described upper and lower helical layer radiation metal paster adopts vertical stacking to place.
Described coaxial feed is made up of the coaxial cable 2 of 50 Ω, and described cable inner core is connected with upper and lower helical layer radiation metal paster respectively.
Described bio-compatible coating structure is made up of the plated film be wrapped in outside view picture antenna.Described plated film adopts the material with biocompatibility characteristics and insulating properties.
As shown in Fig. 1 (b), Fig. 1 (c), double-deck radiation patch has the spiral radiation metal patch of upper and lower two specular to form, by the radius of adjustable screw radiation metal paster and width by antenna resonance in 403MHz.High dielectric constant substrate adopts RO3010 material, and its relative dielectric constant is 10.2, electrical loss angle is 0.0035.The thickness H1 of high dielectric constant substrate is 0.635mm.The radius R 1 of cylindrical grounding probe 3 is 0.2mm, and the radius R 2 of coaxial cable inner core is 0.3mm.
Coating Materials adopts parylene-C material, and its relative dielectric constant is 2.95, electrical loss angle is 0.013, not only has biocompatibility, has insulating properties simultaneously, and coating film thickness is 0.2mm.
As shown in Figure 2, a kind of novel stack planar inverted-F antenna resonance being applied to human body implantable devices is in 403MHz, and have the directional diagram being similar to half-wave dipole, meanwhile, antenna also has higher gain.
The stack planar inverted-F antenna of the present invention's design works in medical treatment and implants communication service frequency range (MICS frequency range: 402-405MHz), has miniaturization, low section, high-gain, the features such as bio-compatible.
Above-described embodiment is the present invention's preferably execution mode; but embodiments of the present invention are not limited by the examples; change, the modification done under other any does not deviate from Spirit Essence of the present invention and principle, substitute, combine, simplify; all should be the substitute mode of equivalence, be included within protection scope of the present invention.
Claims (8)
1. one kind is applied to the novel stack planar inverted-F antenna of human body implantable devices, it is characterized in that, be specially cylindrical structural, comprise double-deck radiation patch structure, coaxial feed and bio-compatible coating structure, described double-deck radiation patch structure is by upper strata spiral radiation metal patch, lower floor's spiral radiation metal patch and metal floor are formed, described lower floor spiral radiation metal patch is connected with metal floor, described coaxial feed is made up of the coaxial cable of 50 Ω, described coaxial cable inner core is connected with upper strata spiral radiation metal patch and lower floor's spiral radiation metal patch respectively.
2. antenna according to claim 1, is characterized in that, described upper strata spiral radiation metal patch and lower floor's spiral radiation metal patch adopt vertical stacking to place, and become mirror image.
3. antenna according to claim 1, is characterized in that, described bio-compatible coating structure is made up of the plated film wrapping up whole antenna, and the thickness of described plated film is 0.2mm.
4. antenna according to claim 1, is characterized in that, the radius of described cylindrical structural is 4.5mm, and thickness is 1.27mm.
5. antenna according to claim 1, is characterized in that, described upper strata spiral radiation metal patch and lower floor's spiral radiation metal patch are printed on medium substrate respectively, and the radius of described medium substrate is 4.5mm, and thickness is 0.635mm.
6. antenna according to claim 1, is characterized in that, described coaxial cable inner core radius is 0.3mm.
7. antenna according to claim 1, is characterized in that, described lower floor spiral radiation metal patch is connected with metal floor especially by cylindrical grounding probe.
8. antenna according to claim 7, is characterized in that, the radius of described cylindrical grounding probe is 0.2mm, and length is 1.27mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201410787833.7A CN104577315A (en) | 2014-12-17 | 2014-12-17 | Novel stack-based planar inverted-F antenna applied to human body implantable equipment |
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| CN201410787833.7A CN104577315A (en) | 2014-12-17 | 2014-12-17 | Novel stack-based planar inverted-F antenna applied to human body implantable equipment |
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| CN104577315A true CN104577315A (en) | 2015-04-29 |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106486740A (en) * | 2016-11-29 | 2017-03-08 | 华南理工大学 | A kind of wideband implanted human body antenna being applied to portable medical |
| CN106505313A (en) * | 2016-12-20 | 2017-03-15 | 华南理工大学 | A kind of difference Dual-frequency wide-band antenna being applied in implantable medical devices |
| CN109638444A (en) * | 2019-01-03 | 2019-04-16 | 西交利物浦大学 | A kind of loop aerial applied to Implanted cardiac pacemaker wireless charging |
| CN113839202A (en) * | 2021-08-12 | 2021-12-24 | 南京信息工程大学 | Implanted antenna based on electromyographic signal transmission |
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| JPH06310930A (en) * | 1993-04-27 | 1994-11-04 | Mitsubishi Electric Corp | Antenna system |
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2014
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Patent Citations (5)
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| JPH06310930A (en) * | 1993-04-27 | 1994-11-04 | Mitsubishi Electric Corp | Antenna system |
| CN201226373Y (en) * | 2008-07-10 | 2009-04-22 | 华南理工大学 | Double-frequency band laminated medium loading helical antenna |
| CN103269750A (en) * | 2010-11-23 | 2013-08-28 | 心脏起搏器公司 | Folded antennas for implantable medical devices |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106486740A (en) * | 2016-11-29 | 2017-03-08 | 华南理工大学 | A kind of wideband implanted human body antenna being applied to portable medical |
| CN106505313A (en) * | 2016-12-20 | 2017-03-15 | 华南理工大学 | A kind of difference Dual-frequency wide-band antenna being applied in implantable medical devices |
| CN106505313B (en) * | 2016-12-20 | 2023-07-18 | 华南理工大学 | Differential dual-frequency broadband antenna applied to implantable medical device |
| CN109638444A (en) * | 2019-01-03 | 2019-04-16 | 西交利物浦大学 | A kind of loop aerial applied to Implanted cardiac pacemaker wireless charging |
| CN109638444B (en) * | 2019-01-03 | 2024-02-02 | 西交利物浦大学 | Annular antenna applied to wireless charging of implantable cardiac pacemaker |
| CN113839202A (en) * | 2021-08-12 | 2021-12-24 | 南京信息工程大学 | Implanted antenna based on electromyographic signal transmission |
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Application publication date: 20150429 |