CN205621856U

CN205621856U - A width axial ratio beam circular polarized antenna for biomedical telemetering measurement

Info

Publication number: CN205621856U
Application number: CN201620407973.1U
Authority: CN
Inventors: 刘雄英; 杨贤涛
Original assignee: South China University of Technology SCUT
Current assignee: South China University of Technology SCUT
Priority date: 2016-05-05
Filing date: 2016-05-05
Publication date: 2016-10-05
Anticipated expiration: 2026-05-05

Abstract

The utility model discloses a width axial ratio beam circular polarized antenna for biomedical telemetering measurement, including antenna radiation unit, metal floor and medium base plate, the printing of antenna radiation unit is at the upper surface of medium base plate, the printing of metal floor is at the lower surface of medium base plate, the antenna radiation unit includes positive spuare metal paster and fluting structure, the fluting structure is located positive spuare metal paster. The utility model has the advantages of miniaturized, low section, high -gain, anti -interference, have wide axial ratio beam and wide half -power beam, a biocompatibility, be applicable to the biomedical field.

Description

A kind of wide axle for biomedical telemetry is than wave beam circular polarized antenna

Technical field

This utility model relates to tele-medicine field, is specifically related to a kind of wide axle ratio for biomedical telemetry Wave beam circular polarized antenna.

Background technology

Along with the raising of people's living standard, the problem such as medical treatment and health supervision receives more and more Concern.In medical diagnosis and long distance monitoring, implanted antenna becomes data transmission system core component One of, the quality of antenna performance will directly affect the enforcement of whole medical procedure and the accuracy of diagnosis.Due to The complexity of implanted Antenna Operation environment, Antenna Design needs to consider many factor, such as tissue There are consumption dispersion characteristics, implant site limited space, biocompatibility, security of electromagnetic radiation and antenna spoke Penetrate the variations in temperature etc. to human body.Single port feed, for dual-port or multiport feed, has knot The compact advantage with miniaturization of structure.Circular polarization characteristics is eliminating multi-path jamming effect, reduces polarization mismatch and causes Loss have uniqueness advantage, if can realize width axle than the circular polarisation of wave beam, then can preferably reduce antenna Position is placed and the requirement of alignment, and therefore, wide axle is particularly well-suited to the application of human body than wave beam circular polarized antenna Environment.

Implanting at present in the antenna technology of human body, great majority are designed as the antenna only with single characteristic, such as Dual-band antenna, differential fed antenna or circular polarized antenna, and most of circular polarized antenna axle is narrower than wave beam, The antenna of simple function is difficult to reply and implants the applied environment requirement that inside of human body is complicated and changeable.

Utility model content

In order to overcome shortcoming that prior art exists with not enough, this utility model provides small size, anti-polarization to lose Join, there is the wide axle a kind of wide axle for biomedical telemetry than wave beam and wide half-power beam than wave beam circle Poliarizing antenna.

This utility model following technology of employing:

A kind of wide axle for biomedical telemetry is than wave beam circular polarized antenna, including antenna radiation unit, gold Possession plate and medium substrate, described antenna radiation unit is printed on the upper surface of medium substrate, described metal ground Plate is printed on the lower surface of medium substrate, and described antenna radiation unit includes square-shaped metal paster and fluting knot Structure, described notching construction is positioned on square-shaped metal paster.

Described notching construction includes two orthogonal main gaps and perturbation unit, position respectively, two main gaps On the diagonal of square-shaped metal paster, wherein the two ends in a main gap each extend over out two extension seams Gap, and form ARROW structure at the two ends in this gap, described perturbation unit is specially four, and perturbation unit sets Put at the end extending gap.

Described perturbation unit is parallelogram.

Also include two grounding probes, said two grounding probe about antenna radiation unit central point, Also include coaxial feed；Also including coaxial feed port, described coaxial feed port is short with one of them Road probe is about a diagonal symmetry of antenna radiation unit.

Also include bio-compatible membrane structure.

Article two, orthogonal main gap length is 14.8mm, and width is 0.4mm, extends a length of of gap 10.3mm, width is 0.4mm.

The beneficial effects of the utility model:

(1) this utility model has the advantages that miniaturization, wide axle are the most broadband circle polarized, and for biology The implanted antenna of medical telemetry；

(2) this utility model uses square metal paster to load the structure in two mutually perpendicular main gaps, real Show miniaturization, placed two grounding probes about aerial radiation paster central point simultaneously, creating Two neighbouring resonant frequencies, define broadband；

(3) this utility model is by extending wherein main gap, makes two gaps form Length discrepancy Structure so that basic mode of resonance be separated into two orthogonal spaces, two of phase 90 degree orthogonal Pattern, defines circular polarization radiation characteristic, obtains wide axle than wave beam and wide half-power beam simultaneously Performance, can solve simultaneously current antenna implant human body faced by various problems, change existing implantation human body The present situation that antenna function is the most single.

Accompanying drawing explanation

Fig. 1 (a) is that a kind of wide axle for biomedical telemetry of this utility model is than wave beam circular polarized antenna Top view；

Fig. 1 (b) is that a kind of wide axle for biomedical telemetry of this utility model is than wave beam circular polarized antenna Side view；

Fig. 2 is that a kind of wide axle for biomedical telemetry of this utility model the present embodiment is than wave beam circular polarisation sky The Parameter Map of line；

Fig. 3 be a kind of wide axle for biomedical telemetry of this utility model than wave beam circular polarized antenna at monolayer Reflection coefficient and axle in human skin tissue model compare analogous diagram；

Fig. 4 be a kind of wide axle for biomedical telemetry of this utility model than wave beam circular polarized antenna at center When frequency is 915MHz, the axle in monolayer human skin tissue model compares directional diagram；

Fig. 5 be a kind of wide axle for biomedical telemetry of this utility model than wave beam circular polarized antenna at center Gain pattern in monolayer human skin tissue model when frequency is 915MHz.

Detailed description of the invention

Below in conjunction with embodiment and accompanying drawing, this utility model is described in further detail, but this practicality is new The embodiment of type is not limited to this.

Embodiment

Shown in Fig. 1 (a) and Fig. 1 (b), a kind of wide axle for biomedical telemetry is than wave beam circular polarisation sky Line, including antenna radiation unit 2, metal floor 7, medium substrate 1, grounding probe 4A, 4B, coaxial feed Electricity port 5 and bio-compatible membrane structure.

Described antenna radiation unit is printed on the upper surface of medium substrate, and described metal floor is printed on medium base The lower surface of plate, described coaxial feed port is by single 50 Ω coaxial cable feed, in described coaxial cable Core radius is 0.4mm, and described bio-compatible membrane structure is made up of the thin-layered medium wrapping up whole antenna, institute The thickness stating coating structure is 0.02mm.

Described antenna radiation unit includes that square-shaped metal paster and notching construction, described notching construction include two The orthogonal main gap of bar constitutes 3A, 3B, and described two main gaps lay respectively at square-shaped metal paster On diagonal, in the present embodiment, two ends of the main gap 3B being positioned on counter-diagonal each extend over out two Bar extends gap, and forms ARROW structure at the two ends in this main gap, and described perturbation unit is specially four 6A-6D, is parallelogram sturcutre, and each perturbation unit is positioned at the end extending gap, parallelogram The a length of 1.1mm in base, high H3 be 1.2mm.Described mutually perpendicular main gap length is 14.8mm, Width is 0.4mm.The a length of 10.3mm of described extended line, width is 0.4mm.

Square-shaped metal paster is referred to as secondary diagonal angle with the diagonal that angle is acute angle of horizontal plane by the present embodiment Line, another is leading diagonal.

Including two grounding probes 4A, 4B, said two grounding probe is about antenna radiation unit central point pair Claiming, described coaxial feed port and one of them grounding probe are symmetrical about counter-diagonal.

Metal floor is square, is turned into 13mm.

In the present embodiment, described medium substrate uses high dielectric constant material RO3010, and its relative dielectric constant is 10.2, electrical loss angle is just being cut to 0.0035, and a length of 13mm of medium substrate, a width of 13mm, thickness H are 0.635mm.Described coaxial feed port about a grounding probe 4B about the secondary diagonal angle of aerial radiation paster Line is symmetrical.

This utility model includes bio-compatible coating structure, and described bio-compatible coating structure is whole by being wrapped in The thin layer of antenna is constituted, and described thin layer uses aluminium oxide (alumina) material, its relative dielectric constant Being 9.2, electrical loss angle is just being cut to 0.008, and thickness is 0.02mm so that antenna has and human body radiation Join, biocompatibility, and tissue is had isolation and insulation effect.

As in figure 2 it is shown, concrete parameter is medium substrate is monolayer, its length: L=13mm, width: W=13 Mm, main gap width and extended line width be all: W1=0.4mm, two main gap lengths are: L1=14.8 Mm, the extended line length in main gap: L2=10.3mm, radiation patch edge and medium substrate on counter-diagonal Border: Gap=0.5mm.Coaxial cable inner core radius is 0.4mm, and the radius of grounding probe is 0.45 mm。

This utility model provides a kind of miniaturization, wide axle than wave beam, broadband circle polarized for biomedical distant The implanted antenna surveyed.Square shaped metal patch loads two mutually perpendicular main gaps, it is achieved that miniaturization. Place two grounding probes about aerial radiation paster central point simultaneously, create neighbouring two humorous Vibration frequency, defines broadband.By the main gap on counter-diagonal is extended, described notching construction Form the gap structure of two Length discrepancy so that basic mode of resonance is separated into two orthogonal spaces, phase places Differ two orthogonal modes of 90 degree, define circular polarization radiation characteristic, obtain wide axle simultaneously and compare wave beam Performance with wide half-power beam.

In the present embodiment, the position of perturbation unit is not limited to position shown in accompanying drawing 1, can be according to practical situation It is adjusted.

As shown in Fig. 3, Fig. 4 and Fig. 5, this utility model uses square shaped metal patch loading two to hang down mutually Straight main gap, it is achieved that the purpose of miniaturization, is placing about aerial radiation paster central point simultaneously Two grounding probes, create neighbouring two resonant frequency, define broadband.By to counter-diagonal On main gap extend, described notching construction formed two Length discrepancy gap structure so that basic Mode of resonance is separated into two orthogonal modes of two orthogonal spaces, phase 90 degree, defines circular polarisation Radiation characteristic, obtains wide axle than wave beam and the performance of wide half-power beam simultaneously.This utility model is real Existing ISM 915MHz frequency range covers, and i.e. works in industry, science, Medical Band (902-928MHz), Make implanted antenna can eliminate multi-path jamming effect, reduce the loss that causes of polarization mismatch and preferably Reduce and aerial position is placed and the requirement of alignment.

This antenna have miniaturization, low section, high-gain, anti-interference, there is wide axle than wave beam and wide half merit The advantages such as rate wave beam, biocompatibility.

Above-described embodiment is this utility model preferably embodiment, but embodiment of the present utility model is not subject to The restriction of described embodiment, other any without departing from being made under spirit of the present utility model and principle Change, modify, substitute, combine, simplify, all should be the substitute mode of equivalence, be included in this practicality new Within the protection domain of type.

Claims

1. the wide axle being used for biomedical telemetry is than wave beam circular polarized antenna, it is characterised in that include sky Beta radiation unit, metal floor and medium substrate, described antenna radiation unit is printed on the upper table of medium substrate Face, described metal floor is printed on the lower surface of medium substrate, and described antenna radiation unit includes square gold Belonging to paster and notching construction, described notching construction is positioned on square-shaped metal paster.

Wide axle the most according to claim 1 is than wave beam circular polarized antenna, it is characterised in that described fluting Structure includes two orthogonal main gaps and perturbation unit, and two main gaps lay respectively at square-shaped metal On the diagonal of paster, wherein the two ends in a main gap each extend over out two extension gaps, and at this seam The two ends of gap form ARROW structure, and described perturbation unit is specially four, and perturbation unit is arranged on extension gap End.

Wide axle the most according to claim 2 is than wave beam circular polarized antenna, it is characterised in that described perturbation Unit is parallelogram.

Wide axle the most according to claim 1 is than wave beam circular polarized antenna, it is characterised in that also include two Individual grounding probe, said two grounding probe is about antenna radiation unit central point；Also include coaxial feed Electricity port, described coaxial feed port and one of them grounding probe are about a diagonal angle of antenna radiation unit Line is symmetrical.

Wide axle the most according to claim 1 is than wave beam circular polarized antenna, it is characterised in that also include raw Thing biocompatible film structure.

Wide axle the most according to claim 2 is than wave beam circular polarized antenna, it is characterised in that two mutually Vertical main gap length is 14.8mm, and width is 0.4mm, extends a length of 10.3mm in gap, and width is 0.4mm。