CN102496786A - Miniaturized spiral antenna system based on near-field coupling - Google Patents
Miniaturized spiral antenna system based on near-field coupling Download PDFInfo
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- CN102496786A CN102496786A CN2011103854378A CN201110385437A CN102496786A CN 102496786 A CN102496786 A CN 102496786A CN 2011103854378 A CN2011103854378 A CN 2011103854378A CN 201110385437 A CN201110385437 A CN 201110385437A CN 102496786 A CN102496786 A CN 102496786A
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Abstract
The invention discloses a miniaturized spiral antenna system based on near-field coupling, comprising an outer-ring spiral antenna, an inner-ring spiral antenna and a cylindrical ferrite ring, wherein the cylindrical ferrite ring is loaded in a spiral antenna and is coaxial to the spiral antenna; the outer-ring spiral antenna is arranged outside the inner-ring spiral antenna and is coaxial to the spiral antenna; and signals are input from the inner-ring spiral antenna and output from the outer-ring spiral antenna. The miniaturized spiral antenna system has the advantages of small size, wider frequency band, high coupling efficiency and the like and can well realize near-distance data transmission.
Description
Technical field
The present invention relates to the technical field of helical antenna, relate in particular to a kind of miniaturization helix antenna system based on the near field coupling.
Background technology
Along with the continuous development of the Aeronautics and Astronautics and the communication technology, the application of short-distance wireless communication technology also deepens continuously.Because the growing tension of radio frequency resources makes short-distance wireless communication demonstrate application prospect widely.The near field coupled communication is exactly one of important way of short-distance wireless communication.Near field coupled communication system generally is based on the inductance coupling high mode, and antenna adopts the form of coil, promptly closed loop coil; Dispatch coil produces magnetic field through inductance coupling high; Data are set up link through the magnetic coupling, carry out transfer of data, in the process of coupling; Utilize the alternation magnetic energy that does not radiate of aerial coil generation, be equivalent to the radiation near field situation of antenna.And ferrite is a kind of ferromagnetic metal oxide that has, and Ferrite Material is applied to can make the antenna system miniaturization in the helical antenna system of near field coupling, thereby improves coupling efficiency.
Helical antenna has different forms, like center coupling helicon beam antenna, non-equidistance dual-frequency helical antenna, quadrifilar helical antenna or the like.Structure is the key of decision helical antenna characteristic.The helical antenna of different structure form has different characteristic.Uniform pitch or non-uniform pitch are helical antenna forms commonly used at present, and prior art generally adopts snail structure (microstrip structure) or air-core helical structure.This structural volume is bigger, can't be applied in to require in small size, the in-plant communication environment.
According to transmission line theory, adopt the ferritic miniaturization helix antenna structure of loading can satisfy the closely communicating requirement of magnetic field coupling.Miniaturization helix antenna system based on the near field coupling can equivalence be distributed circuit, i.e. transformer model.Just can change the coupling capacitance and the coupling inductance of helical antenna system through diameter, pitch, length (number of turn), inner ring and outer ring spiral intervals and the Ferrite Material etc. that change the Internal and external cycle helical antenna; Thereby change the resonance frequency and the coupling efficiency of helical antenna system, realize the closely target of transfer of data.
Summary of the invention
A kind of miniaturization helix antenna system that the objective of the invention is to be directed against the deficiency of prior art and provide based on the near field coupling, this system bulk is little, the frequency band broad, it is less to decay, and can realize in-plant transfer of data well.
The concrete technical scheme that realizes the object of the invention is:
A kind of miniaturization helix antenna system based on the near field coupling, this system comprises outer ring helical antenna, inner ring helical antenna and column type ferrite core; It is interior and coaxial with helical antenna that the column type ferrite core loads on helical antenna; The outer ring helical antenna is located at outside the inner ring helical antenna and is coaxial with helical antenna; Signal is from the input of inner ring helical antenna, the output of outer ring helical antenna; Realize the near field coupling and the miniaturization of helical antenna system.
Wherein, the diameter of said outer ring helical antenna is 5.5～12mm, and pitch is 0.5～2mm, and diameter of wire is 0.1～0.5mm, and the length of antenna is no more than 10mm.
Wherein, the diameter of said inner ring helical antenna is 5～8mm, and pitch is 0.5～2mm, and diameter of wire is 0.1～0.5mm, and the length of antenna is no more than 10mm.
Wherein, the external diameter of said ferrite core is 5～8mm, and internal diameter is 3～5mm, and length is no more than 10mm.
Wherein, three of said helical antenna system resonance frequencys are between 15 ~ 300MHz.During work closely data communication carry out in these three frequencies.
Wherein, but said inside and outside circle helical antenna uniform pitch or non-uniform pitch, and non-uniform pitch is that pitch increases or pitch reduces.
Wherein, the material of said inside and outside circle helical antenna is copper, silver or golden; The material of said ferrite core is a nickel-zinc ferrite.
Among the present invention, inner ring, outer ring helical antenna are coaxial with ferrite core, and inner ring and outer ring helical antenna are isolated with insulating tape.
Miniaturization helix antenna system based on the near field coupling provided by the invention is one and realizes the closely system of transfer of data.When data-signal when inner ring helical antenna (transmitting antenna) is imported; The alternation magnetic line of force that the inner ring helical antenna produces passes outer ring helical antenna (reception antenna); And in the helical antenna of outer ring, produce induced voltage; Ferrite core is pack magnetic field then, and data arrive the outer ring helical antenna through the magnetic coupled transfer like this, thereby realize the efficient coupling and the miniaturization of data.Miniaturization helix antenna system based on the near field coupling can equivalence be a transformer model, realizes the resonance of inner ring, outer ring helical antenna frequency through changing inductance and electric capacity, increases quality factor through system's allotment, thereby improves coupling efficiency.The less coil of the diameter heart therein produces bigger magnetic field intensity, and along with the reducing or increase of distance between inner ring spiral and the outer ring spiral, magnetic field intensity presents non-linear increase or reduces.
Advantage of the present invention is that volume is little, frequency band broad, decay are less, can realize in-plant transfer of data well.Ferrite core is realized the miniaturization of helical antenna system; The resonance frequency of helical antenna system can be regulated according to physical size, the number of turn, uniform pitch or the non-uniform pitch etc. of inner ring, outer ring helical antenna, and the working band broad; Miniaturization inner ring, outer ring helical antenna are realized closely magnetic field coupling, increase coupling efficiency.
Description of drawings
Fig. 1 is a structural representation of the present invention;
Structural representation when Fig. 2 does not load the column type ferrite core for the present invention;
Fig. 3 is the inside and outside circle helical antenna structure of a present invention sketch map, and a is a uniform pitch among the figure, and b is non-uniform pitch.
Embodiment
Further set forth the present invention in detail below in conjunction with accompanying drawing and embodiment, but embodiment not a limitation of the present invention.Under spirit that does not deviate from inventive concept and scope, variation and advantage that those skilled in the art can expect all are included among the present invention.
Consult Fig. 1 and Fig. 2, present embodiment provides a kind of miniaturization helix antenna system based on the near field coupling, comprises outer ring helical antenna 1, inner ring helical antenna 2 and column type ferrite core 3; Ferrite core 3 loads in the inside spin antenna 2 and is coaxial with outer ring helical antenna 1, inner ring helical antenna 2.During work, signal is realized the near field coupling and the miniaturization of helical antenna system from 2 inputs of inner ring helical antenna, 1 output of outer ring helical antenna.
The material of outer ring helical antenna 1 and inner ring helical antenna 2 is a copper in the present embodiment, and the material of ferrite core 3 is nickel-zinc ferrites.
The diameter D2 of outer ring helical antenna 1 is 5.5mm in the present embodiment, and pitch S2 is 1mm, and the number of turn is 10, and diameter of wire is 0.2mm.The diameter D1 of inner ring helical antenna 2 is 5mm, and pitch S1 is 1.25mm, and the number of turn is 8, and diameter of wire is 0.2mm.The external diameter of ferrite core 3 is 5mm, and internal diameter is 3mm.Outer ring helical antenna 1 and inner ring helical antenna 2 equal uniform pitchs.Inner ring and outer ring helical antenna are isolated with insulating tape.Antenna length h is 10mm in the present embodiment.
Three resonance frequencys of present embodiment are 27.8MHz, 175MHz, 268MHz.
Compared with prior art, present embodiment has that size is littler, coupling efficiency is higher, can realize advantage such as near field coupled communication well based on the miniaturization helix antenna system configuration of near field coupling.
Claims (7)
1. the miniaturization helix antenna system based on the near field coupling is characterized in that this system comprises outer ring helical antenna (1), inner ring helical antenna (2) and column type ferrite core (3); It is interior and coaxial with helical antenna (2) that column type ferrite core (3) loads on helical antenna (2); Outer ring helical antenna (1) is located at outside the inner ring helical antenna (2) and is coaxial with helical antenna (2); Signal is from inner ring helical antenna (2) input, outer ring helical antenna (1) output.
2. antenna system according to claim 1, the diameter that it is characterized in that said outer ring helical antenna (1) is 5.5～12mm, and pitch is 0.5～2mm, and diameter of wire is 0.1～0.5mm, and antenna length is 9～10mm.
3. antenna system according to claim 1, the diameter that it is characterized in that said inner ring helical antenna (2) is 5～8mm, and pitch is 0.5～2mm, and diameter of wire is 0.1～0.5mm, and antenna length is 9～10mm.
4. antenna system according to claim 1, the external diameter that it is characterized in that said column type ferrite core (3) is 5～8mm, internal diameter is 3～5mm, length 9～10mm.
5. antenna system according to claim 1 is characterized in that there are three resonance frequencys in this system, and resonance frequency is 15～300MHz.
6. antenna system according to claim 1 is characterized in that said inner ring helical antenna (2) and outer ring helical antenna (1) are respectively uniform pitch or non-uniform pitch.
7. antenna system according to claim 1, the material that it is characterized in that said inner ring helical antenna (2) and outer ring helical antenna (1) is copper, silver or golden; The material of said column type ferrite core (3) is a nickel-zinc ferrite.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN2011103854378A CN102496786A (en) | 2011-11-29 | 2011-11-29 | Miniaturized spiral antenna system based on near-field coupling |
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| Application Number | Priority Date | Filing Date | Title |
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| CN2011103854378A CN102496786A (en) | 2011-11-29 | 2011-11-29 | Miniaturized spiral antenna system based on near-field coupling |
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| CN102496786A true CN102496786A (en) | 2012-06-13 |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104681932A (en) * | 2015-02-11 | 2015-06-03 | 华南理工大学 | Medium-distance wireless energy transmission cylindrical helical electric small antenna |
| CN108459217A (en) * | 2018-02-01 | 2018-08-28 | 深圳市共进电子股份有限公司 | Antenna measurement device |
| CN110031859A (en) * | 2017-12-20 | 2019-07-19 | 莱卡地球系统公开股份有限公司 | Near-fault pulse detection |
| CN110797637A (en) * | 2019-10-18 | 2020-02-14 | 青岛大学 | Broadband helical antenna and design method thereof |
| CN111740215A (en) * | 2020-07-28 | 2020-10-02 | 福州大学 | Miniaturized coupled multi-band spiral antenna with self-phase-shift feed |
| CN112218770A (en) * | 2018-03-30 | 2021-01-12 | 米其林集团总公司 | Radio frequency transponder for tire |
| CN112310632A (en) * | 2020-11-11 | 2021-02-02 | 深圳市得自在科技有限公司 | Antenna |
| CN113825307A (en) * | 2021-09-27 | 2021-12-21 | 中芯(深圳)精密电路科技有限公司 | Multilayer PCB magnetic antenna |
-
2011
- 2011-11-29 CN CN2011103854378A patent/CN102496786A/en active Pending
Non-Patent Citations (2)
| Title |
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| 崔超，廖斌: "法向模螺旋天线近场耦合的研究", 《信息技术》 * |
| 崔超: "小型化螺旋天线系统的研究", 《华东师范大学硕士学位论文》 * |
Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104681932A (en) * | 2015-02-11 | 2015-06-03 | 华南理工大学 | Medium-distance wireless energy transmission cylindrical helical electric small antenna |
| CN110031859A (en) * | 2017-12-20 | 2019-07-19 | 莱卡地球系统公开股份有限公司 | Near-fault pulse detection |
| CN110031859B (en) * | 2017-12-20 | 2023-05-09 | 莱卡地球系统公开股份有限公司 | Near field pulse detection |
| CN108459217B (en) * | 2018-02-01 | 2021-01-15 | 深圳市共进电子股份有限公司 | Antenna testing device |
| CN108459217A (en) * | 2018-02-01 | 2018-08-28 | 深圳市共进电子股份有限公司 | Antenna measurement device |
| CN112218770B (en) * | 2018-03-30 | 2022-09-30 | 米其林集团总公司 | Radio frequency transponder for tire |
| CN112218770A (en) * | 2018-03-30 | 2021-01-12 | 米其林集团总公司 | Radio frequency transponder for tire |
| CN110797637A (en) * | 2019-10-18 | 2020-02-14 | 青岛大学 | Broadband helical antenna and design method thereof |
| CN111740215A (en) * | 2020-07-28 | 2020-10-02 | 福州大学 | Miniaturized coupled multi-band spiral antenna with self-phase-shift feed |
| CN111740215B (en) * | 2020-07-28 | 2023-08-18 | 福州大学 | Self-phase-shift feed miniaturized coupled multi-band helical antenna |
| CN112310632A (en) * | 2020-11-11 | 2021-02-02 | 深圳市得自在科技有限公司 | Antenna |
| CN113825307A (en) * | 2021-09-27 | 2021-12-21 | 中芯(深圳)精密电路科技有限公司 | Multilayer PCB magnetic antenna |
| CN113825307B (en) * | 2021-09-27 | 2023-02-03 | 中芯(深圳)精密电路科技有限公司 | Multilayer PCB magnetic antenna |
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Application publication date: 20120613 |