CN108767469A - A kind of double open circuit parallel resonance short-range communication antennas - Google Patents
A kind of double open circuit parallel resonance short-range communication antennas Download PDFInfo
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- CN108767469A CN108767469A CN201810750098.0A CN201810750098A CN108767469A CN 108767469 A CN108767469 A CN 108767469A CN 201810750098 A CN201810750098 A CN 201810750098A CN 108767469 A CN108767469 A CN 108767469A
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- open circuit
- double open
- parallel resonance
- range communication
- circuit parallel
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- 238000004891 communication Methods 0.000 title claims abstract description 42
- 239000000758 substrate Substances 0.000 claims abstract description 26
- 239000002184 metal Substances 0.000 claims abstract description 4
- 238000005452 bending Methods 0.000 claims description 4
- 230000008878 coupling Effects 0.000 abstract description 16
- 238000010168 coupling process Methods 0.000 abstract description 16
- 238000005859 coupling reaction Methods 0.000 abstract description 16
- 230000005540 biological transmission Effects 0.000 abstract description 5
- 238000013461 design Methods 0.000 abstract description 3
- 230000005855 radiation Effects 0.000 description 8
- 238000005516 engineering process Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 230000007423 decrease Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000012546 transfer Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000005672 electromagnetic field Effects 0.000 description 1
- 230000005674 electromagnetic induction Effects 0.000 description 1
- 238000007639 printing Methods 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
Classifications
-
- 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
-
- 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
Landscapes
- Variable-Direction Aerials And Aerial Arrays (AREA)
- Waveguide Aerials (AREA)
Abstract
The invention discloses a kind of double open circuit parallel resonance short-range communication antennas, including medium substrate, the medium substrate upper surface is equipped with double open circuit parallel resonance minor matters of left and right mirror symmetry and the microstrip feed line positioned at double open circuit parallel resonance minor matters central axes, and the medium substrate lower surface is metal base plate.The short-range communication antenna, working frequency range 5.2GHz are suitable for 802.11 agreements, and the transmission of high speed short distance information may be implemented；The short-range communication antenna can reduce far gain while short distance is realized compared with close coupling, avoid generating interference to adjacent communication equipment；Generally speaking, short-range communication antenna structure of the invention is simple, ingenious in design, is easy to make, and has very strong practicability and application prospect.
Description
Technical field
The invention belongs to short-range communication antenna technical fields, and in particular to a kind of double open circuit parallel resonance short-range communications
Antenna.
Background technology
Close range communication techniques include radio frequency identification (RFID) technology, NFC technique and emerging TransferJet skills
Art.In uhf band or HF, LF frequency range, NFC is in the HF frequency ranges of 13.56MHz for the wherein many places RFID, they utilize electromagnetic induction
Principle carries out near-field coupling, but due to frequency range is relatively low, transmission rate is slower, it is difficult to meet large capacity, the information of high-speed passes
Defeated demand.TransferJet technologies combine the characteristics of ultra wide band (UWB) and near-field communication (NFC), centre frequency well
It is in 4.48GHz, theoretically there is the transmission rate of up to 375Mbps, but due to the commerce policy of TransferJet alliances,
It is difficult to use in secondary industrial development.A kind of rational solution is transformed to existing 802.11 agreement, in limited sky
Between, in the case of finite bandwidth, complete point-to-point high-rate information transmission.On the one hand low work(is completed by reducing output power
Consumption inhibits the problem of space channel interference, and on the other hand, antenna works out applicable as essential equipment in communication system
It is of great significance in the super close distance communication antenna of 802.11 agreements.
Microstrip antenna because the features such as its is at low cost, simple in structure, the process-cycle is short, is widely used, mainly by
Three parts are constituted：The microband paste radiating element and feed line on upper layer, the medium substrate in middle level, the floor of lower layer.Micro-strip day
Line use PCB printing technologies, easily with circuit Integrated design.
Invention content
Present invention aim to address the above problems, provide a kind of double open circuit parallel resonance short-range communication antennas, the day
Line can complete multichannel, the concurrent high-speed transfer of large capacity wireless data in a limited space.
In order to solve the above technical problems, the technical scheme is that：A kind of double open circuit parallel resonance short-range communication days
Line, including medium substrate, the medium substrate upper surface are equipped with double open circuit parallel resonance minor matters and the position of left and right mirror symmetry
Microstrip feed line in double open circuit parallel resonance minor matters central axes, the medium substrate lower surface is metal base plate.
Preferably, the unilateral length of double open circuit parallel resonance minor matters is all-wave length.
Preferably, the both sides half-wave strong point of double open circuit parallel resonance minor matters carries out 90 ° of bendings.
Preferably, the thickness of the medium substrate is no more than 1 ㎜, preferably 0.6 ㎜.
Preferably, the medium substrate uses the FR4 medium substrates that dielectric constant is 0.002 for 4.4, loss.
The innovation of the invention consists in that using the symmetrical resonance structure of micro-strip, Antenna Far Field gain is reduced, increases antenna near-field
Distributing homogeneity realizes antenna near-field close coupling, and coupling loss increases with distance and decays rapidly.The principle of the present invention
It is：The short-range communication antenna is considered as symmetrical two open-circuit resonant devices and composes in parallel, from the point of view of whole angle, day
The left arm and feeder line of line constitute the first resonator, and the right arm and feeder line of antenna constitute the second resonator, two resonators
Length respectively may be about λ, and resonant frequency is identical.Since antenna minor matters are symmetrical about X-axis, so antenna surface current distribution
It is full symmetric, on antenna left arm electric current with electric current on right arm on the contrary, and current strength it is identical, therefore formed electromagnetic field in far field
It cancels out each other so that antenna is reduced in far gain, and the radiation in the especially faces XOZ is almost nil, this point is from far-field pattern
It can be seen that.Further, the electric current on high band, microstrip line would generally antenna minor matters half-wave strong point it is reversed, weaken
The minor matters of antenna are bent in half-wave strong point, increase Q values by the radiation of antenna.Electric current becomes in the same direction, more uniform to be formed
Near field distribution.In order to further decrease the gain of antenna, medium substrate is done relatively thin, i.e., thickness is no more than 1 ㎜, the antenna back side
Ground can induce the electric current opposite with direction in positive micro-band branch, to offset the radiation in far field.
The beneficial effects of the invention are as follows：Double open circuit parallel resonance short-range communication antennas provided by the invention, working frequency
For 5.15-5.35GHz under 802.11a agreements, centre frequency 5.25GHz, the transmission of high speed short distance information may be implemented；This is close
Distance communication antenna can reduce far gain while short distance is realized compared with close coupling, avoid generating adjacent communication equipment
Interference；Generally speaking, short-range communication antenna structure of the invention is simple, ingenious in design, is easy to make, and has very strong practicality
Property and application prospect.
Description of the drawings
Fig. 1 is the structural schematic diagram of the double open circuit parallel resonance short-range communication antennas of the present invention；
Fig. 2 is the double open circuit parallel resonance short-range communication antennas of the present invention in Surface current distribution；
Fig. 3 is the emulation directional diagram of the double open circuit parallel resonance short-range communication antennas of the present invention；
Fig. 4 is situation when the double open circuit parallel resonance short-range communication antenna faces of the present invention are placed；
Fig. 5 is that coupling loss S21 declines with distance when the double open circuit parallel resonance short-range communication antenna faces of the present invention are placed
Subtract figure；
Fig. 6 be the double open circuit parallel resonance short-range communication antennas of the present invention along Y-axis side to placing when situation；
Fig. 7 be the double open circuit parallel resonance short-range communication antennas of the present invention along Y-axis side to placing when coupling loss S21 with away from
From decay pattern；
Fig. 8 be the double open circuit parallel resonance short-range communication antennas of the present invention along X-axis side to placing when situation；
Fig. 9 be the double open circuit parallel resonance short-range communication antennas of the present invention along X-axis side to placing when coupling loss S21 with away from
From decay pattern；
Figure 10 is the double open circuit parallel resonance short-range communication antennas of the present invention back to situation when placing；
Figure 11 is that the double open circuit parallel resonance short-range communication antennas of the present invention decline back to coupling loss S21 when placing with distance
Subtract figure；
Reference sign：1, double open circuit parallel resonance minor matters；2, microstrip feed line.
Specific implementation mode
The present invention is described further in the following with reference to the drawings and specific embodiments：
As shown in Figure 1, the double open circuit parallel resonance short-range communication antennas of one kind of the present invention, including medium substrate, medium
The double open circuit parallel resonance minor matters of upper surface of base plate and microstrip feed line, medium substrate lower surface are metal base plate.Double open circuits are in parallel humorous
Minor matters or so of shaking mirror symmetry is arranged.Microstrip feed line is located at double open circuit parallel resonance minor matters axis line positions.
In the present embodiment, micro- by taking working frequency is double open circuit parallel resonance short-range communication antenna of 5.2GHz as an example
Band antenna list detail size is a wavelength, and physical length is between vacuum wavelength λ0=c/f0With medium wavelengthIt
Between, thus determine that size is as follows：Radiation patch a length of 29.4mm, width 7.5mm.Medium substrate uses dielectric constant for 4.4, damage
The FR4 medium substrates that consumption is 0.002.In order to reduce antenna gain, the thickness of medium substrate is preferably 0.6 ㎜.Double open circuits are in parallel
The unilateral length of resonance minor matters is all-wave length.To increase Q values, weakens far-field radiation, enhance the stiffness of coupling near field, double open circuits
The unilateral half-wave strong point of the two of parallel resonance minor matters carries out 90 ° of bendings.Further, double open circuit parallel resonance minor matters two are unilateral
Second half section bent inwards twice successively again, an outward bending.The resistance of microstrip feed line is 50 Ω.
As shown in Fig. 2, since antenna minor matters are symmetrical about X-axis, so antenna surface current distribution is also full symmetric,
Current strength is identical on antenna both arms, and direction is opposite.
It should be noted that：Medium substrate is thinner, and the far gain of antenna is lower, and near field intensity is stronger, but due to will be with
Circuit is integrated, needs the thickness in view of circuit board, and medium substrate is thinner, mechanical strength is lower, thus the thickness of medium substrate
Gain is 1.5dbi, further preferably 0.6 ㎜ when degree preferably more than 1mm, 1mm.
In addition, microstrip feed line, which is designed as 50 Ω, conveniently to be integrated with circuit to match.Any antenna or circuit
Port Impedance can only be not necessarily 50Ohm, can also be other value, and current 50 Ω is the standard of industry universal.Therefore all at this
Under invention thought guidance, other resistance values that microstrip feed line uses also belong to protection scope of the present invention.
As shown in figure 3, emulation directional diagram show Antenna Far Field radiation characteristic, antenna the faces XOZ radiation by high degree
Weaken, antenna entire gain is relatively low, interferes adjacent communication equipment smaller.
As shown in figure 4, position when antenna face places work is put.Antenna gain is relatively low, and far-field radiation is smaller, and close
Distance couples stronger, and the coupling loss between antenna is adjusted the distance sensitivity.As shown in figure 5, the coupling loss of antenna is with distance
Increase rapid decaying, adjacent communication equipment is interfered while closely keeping stronger coupling smaller.
As shown in figs. 6-7, along Y-axis side to placing, the coupling loss of antenna decays rapidly antenna with the increase of distance.
As shown in Fig. 8~9, along X-axis side to placing, the coupling loss of antenna decays rapidly antenna with the increase of distance.
As shown in Figure 10~11, antenna is decayed rapidly back to placement, the coupling loss of antenna with the increase of distance.
In general, a kind of double open circuit parallel resonance short-range communication antennas provided by the invention, which can be limited
In space, multichannel, the concurrent high-speed transfer of large capacity wireless data are completed, at low cost, simple in structure, the process-cycle is short
Advantage has very strong practicability and application prospect.
Those of ordinary skill in the art will understand that the embodiments described herein, which is to help reader, understands this hair
Bright principle, it should be understood that protection scope of the present invention is not limited to such specific embodiments and embodiments.This field
Those of ordinary skill can make according to the technical disclosures disclosed by the invention various does not depart from the other each of essence of the invention
The specific variations and combinations of kind, these variations and combinations are still within the scope of the present invention.
Claims (6)
1. a kind of double open circuit parallel resonance short-range communication antennas, it is characterised in that：Including medium substrate, on the medium substrate
Surface is equipped with double open circuit parallel resonance minor matters of left and right mirror symmetry and positioned at double open circuit parallel resonance minor matters central axes
Microstrip feed line, the medium substrate lower surface be metal base plate.
2. double open circuit parallel resonance short-range communication antennas according to claim 1, it is characterised in that：Double open circuits are simultaneously
The unilateral length for joining resonance minor matters is all-wave length.
3. double open circuit parallel resonance short-range communication antennas according to claim 2, it is characterised in that：Double open circuits are simultaneously
The both sides half-wave strong point of connection resonance minor matters carries out 90 ° of bendings.
4. according to any double open circuit parallel resonance short-range communication antennas of claim 1-3, it is characterised in that：It is given an account of
The thickness of matter substrate is no more than 1 ㎜.
5. according to any double open circuit parallel resonance short-range communication antennas of claim 1-3, it is characterised in that：It is given an account of
The thickness of matter substrate is 0.6 ㎜.
6. according to any double open circuit parallel resonance short-range communication antennas of claim 1-3, it is characterised in that：It is given an account of
Matter substrate uses the FR4 medium substrates that dielectric constant is 0.002 for 4.4, loss.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810750098.0A CN108767469B (en) | 2018-07-10 | 2018-07-10 | Dual-open-circuit parallel resonance near field communication antenna |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810750098.0A CN108767469B (en) | 2018-07-10 | 2018-07-10 | Dual-open-circuit parallel resonance near field communication antenna |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108767469A true CN108767469A (en) | 2018-11-06 |
| CN108767469B CN108767469B (en) | 2024-05-14 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810750098.0A Active CN108767469B (en) | 2018-07-10 | 2018-07-10 | Dual-open-circuit parallel resonance near field communication antenna |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20080089861A (en) * | 2007-04-02 | 2008-10-08 | 엘지이노텍 주식회사 | antenna |
| US20090295671A1 (en) * | 2005-03-18 | 2009-12-03 | Keiji Yoshida | Method of Producing Communication Circuit, Communication Device, an Impedance- Matching Circuit, and an Impedance-Matching Circuit, and an Impedance-Matching Circuit Design Method |
| CN101752648A (en) * | 2008-11-28 | 2010-06-23 | 航天信息股份有限公司 | Broadband RFID UHF antenna and label with and manufacture method |
| WO2014103025A1 (en) * | 2012-12-28 | 2014-07-03 | シャープ株式会社 | Wireless ic tag apparatus |
| CN208336508U (en) * | 2018-07-10 | 2019-01-04 | 成都爱为贝思科技有限公司 | A kind of double open circuit parallel resonance short-range communication antennas |
-
2018
- 2018-07-10 CN CN201810750098.0A patent/CN108767469B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20090295671A1 (en) * | 2005-03-18 | 2009-12-03 | Keiji Yoshida | Method of Producing Communication Circuit, Communication Device, an Impedance- Matching Circuit, and an Impedance-Matching Circuit, and an Impedance-Matching Circuit Design Method |
| KR20080089861A (en) * | 2007-04-02 | 2008-10-08 | 엘지이노텍 주식회사 | antenna |
| CN101752648A (en) * | 2008-11-28 | 2010-06-23 | 航天信息股份有限公司 | Broadband RFID UHF antenna and label with and manufacture method |
| WO2014103025A1 (en) * | 2012-12-28 | 2014-07-03 | シャープ株式会社 | Wireless ic tag apparatus |
| CN208336508U (en) * | 2018-07-10 | 2019-01-04 | 成都爱为贝思科技有限公司 | A kind of double open circuit parallel resonance short-range communication antennas |
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| Publication number | Publication date |
|---|---|
| CN108767469B (en) | 2024-05-14 |
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