CN209448023U - Antenna assembly and electronic equipment - Google Patents

Antenna assembly and electronic equipment Download PDF

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Publication number
CN209448023U
CN209448023U CN201920337425.XU CN201920337425U CN209448023U CN 209448023 U CN209448023 U CN 209448023U CN 201920337425 U CN201920337425 U CN 201920337425U CN 209448023 U CN209448023 U CN 209448023U
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China
Prior art keywords
coil
antenna
antenna assembly
frequency
electronic equipment
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CN201920337425.XU
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Chinese (zh)
Inventor
天野信之
市川敬一
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Murata Manufacturing Co Ltd
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Murata Manufacturing Co Ltd
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Priority to JP2018079601A priority Critical patent/JP2019192951A/en
Priority to JP2018-079601 priority
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Abstract

A kind of antenna assembly and electronic equipment, in the structure for having multiple coils and the communication performance of communication counterpart is high and inhibit the deviation of the communication characteristic due to the mutual positional relationship of multiple coils.Antenna assembly has coil antenna (101) etc..Coil antenna has the second coil (L2) of the winding of insulating substrate (10), the multiple first coil (L1) of winding of a part for constituting the first resonance circuit and a part for constituting the second resonance circuit repeatedly.First coil is connect with power supply circuit.The wireline reel (AX1) of first coil is parallel with wireline reel (AX2) of the second coil.From the winding axis direction (Z-direction) of first coil, at least part of first coil and the second coil is mutually parallel, and configures in the radially alternating of first coil.First coil and the second coil mutually carry out electromagnetic field couples, so that circular the direction of the electric current flowed through in first coil and the second coil is as the same direction.

Description

Antenna assembly and electronic equipment
Technical field
The utility model relates to antenna assemblies, in particular to have the antenna assembly of multiple coils and have the antenna The electronic equipment of device.
Background technique
Conventionally, there is known have coil antenna and with the coil antenna carry out magnetic field coupling gain antenna day it is traditional thread binding It sets.
Has the first coil (sheet type coil) connecting with power supply circuit and with first for example, disclosing in patent document 1 Coil carries out the antenna assembly of the second coil (gain antenna) of magnetic field coupling.Antenna assembly shown in patent document 1 is to be connected It connects the circuit of first coil and is connected the complex resonance antenna of the equal resonance of circuit of the second coil.
Citation
Patent document
Patent document 1: Japanese Unexamined Patent Publication 2013-243566 bulletin
But in the structure shown in patent document 1, because first coil is low with the degree of coupling of the second coil, day The communication performance of line is low.In addition, the mutual degree of coupling of coil becomes sometimes according to the positional relationship of first coil and the second coil It is dynamic, it is possible to generate deviation in the communication characteristic of antenna assembly.
Utility model content
The utility model project to be solved
The purpose of the utility model is to provide a kind of in the structure for having multiple coils and the communicativeness of communication counterpart Can deviation that is high and inhibiting communication characteristic due to the mutual positional relationship of multiple coils antenna assembly and electronics set It is standby.
A technical solution to solve project
The antenna assembly of the utility model is characterized in that having: insulating substrate;First coil is connect with power supply circuit, The a part for constituting the first resonance circuit is formed in the insulating substrate, and winds multiple;And second coil, constitute second A part of resonance circuit is formed in the insulating substrate, and winds repeatedly, the wireline reel of the first coil and described second The wireline reel of coil is parallel, from the winding axis direction of the first coil, the first coil and second coil At least part it is mutually parallel, and radially alternately configuring in the first coil, so that the first coil clips Second coil and second coil clips the first coil, about the first coil and second coil, Become the same direction in the circular direction for the electric current that the first coil and second coil flow through, mutually progress electromagnetic field Coupling.
The electronic equipment of the utility model is characterized in that having shell, antenna assembly and power supply circuit, the day Line apparatus includes insulating substrate;First coil constitutes a part of the first resonance circuit, is formed in the insulating substrate, and roll up Around multiple;And second coil, a part of the second resonance circuit is constituted, the insulating substrate is formed in, and is wound repeatedly, institute The wireline reel for stating first coil is parallel with the wireline reel of second coil, from the winding axis direction of the first coil, The first coil and at least part of second coil are mutually parallel, and radially replacing in the first coil Ground configuration, so that the first coil clips second coil and second coil clips the first coil, about institute First coil and second coil are stated, in the circular direction for the electric current that the first coil and second coil flow through As the same direction, mutually progress electromagnetic field couples, the first coil is connect with the power supply circuit.
According to this structure, first coil and the second coil are both formed in insulating substrate, thus with first coil and Two coil is respectively formed at the case where different components and compares, and is not likely to produce the inclined of first coil and the positional relationship of the second coil Difference.Therefore, the variation that can inhibit the degree of coupling of the deviation due to the mutual positional relationship of coil, is able to suppress communication characteristic Deviation.
In addition, according to this structure, first coil and the second coil are mutually parallel, and in radially alternating configure, therefore energy Enough shorten the distance between first coil and the second coil.Therefore, difference is respectively formed at first coil and the second coil Component the case where compare, can be improved the mutual coupling of coil, can be improved the communication characteristic of antenna assembly.
Utility model effect
According to the utility model, can be realized it is high with the communication performance of communication counterpart in the structure for having multiple coils and Inhibit the antenna assembly and electronic equipment of the deviation of the communication characteristic due to the mutual positional relationship of multiple coils.
Detailed description of the invention
Fig. 1 (A) is the top view for the coil antenna 101 that first embodiment is related to, and Fig. 1 (B) is that the A-A in Fig. 1 (A) is cutd open View.
Fig. 2 is the circuit diagram for the electronic equipment 401 for having antenna assembly 301 in first embodiment.
Fig. 3 is the perspective view for showing the positional relationship of coil antenna 101 and communication counterpart antenna 500.
Fig. 4 is the figure for showing coil antenna 101 and the mode of the coupling of communication counterpart antenna 500 shown in Fig. 3.
Fig. 5 is the circuit diagram for showing the couple state of coil antenna 101 and communication counterpart antenna.
Fig. 6 (A) is the top view of the coil antenna 100A of the single resonance as comparative example, and Fig. 6 (B) is as another ratio Compared with the top view of the coil antenna 100B of example.
Fig. 7 is to show resonance frequency fRWith the figure of the relationship of factor alpha.
Fig. 8 is to show the figure of the first impedance Z 1 and the second impedance Z 2 and the relationship of frequency.
Fig. 9 (A) is the circuit diagram for the electronic equipment 402A that second embodiment is related to, and Fig. 9 (B) is that second embodiment relates to And another electronic equipment 402B circuit diagram.
Figure 10 is the circuit diagram for another electronic equipment 402C that second embodiment is related to.
Figure 11 is the cross-sectional view for the coil antenna 103 that third embodiment is related to.
Figure 12 (A) is the top view for the antenna assembly 304A that the 4th embodiment is related to, and Figure 12 (B) is to show Figure 12 (A) Shown in antenna assembly 304A and communication counterpart antenna 500 positional relationship perspective view.
Figure 13 (A) is the top view for another antenna assembly 304B that the 4th embodiment is related to, and Figure 13 (B) is to show figure The perspective view of the positional relationship of antenna assembly 304B shown in 13 (A) and communication counterpart antenna 500.
Figure 14 (A) is the top view for another antenna assembly 304C that the 4th embodiment is related to, and Figure 14 (B) is to show figure The perspective view of the positional relationship of antenna assembly 304C shown in 14 (A) and communication counterpart antenna 500.
Figure 15 (A) is the perspective view for the positional relationship for showing coil antenna 100 and measuring coil 600, and Figure 15 (B) is to show The main view of the positional relationship of coil antenna 100 and measurement coil 600.
Figure 16 is the top view of coil antenna 100.
Figure 17 is the coefficient of coup k for showing coil antenna 100 and measuring coil 60013 EQFigure.
Figure 18 (A) is the top view for showing the construction of enclosure interior for the electronic equipment 405 that the 5th embodiment is related to, figure 18 (B) are the B-B cross-sectional views in Figure 18 (A).
Figure 19 is the cross-sectional view for showing the construction of enclosure interior for the electronic equipment 406 that sixth embodiment is related to.
Description of symbols
AX1: the wireline reel of first coil;
The wireline reel of AX2: the second coil;
C10, C10a, C10b, C11, C11a, C11b, C12, C12a, C12b: first capacitor device;
C20: the second capacitor;
E11: the first end of first coil;
E12: the second end of first coil;
The first end of E21: the second coil;
The second end of E22: the second coil;
f1: first frequency;
f2: second frequency;
F: third frequency;
fR: resonance frequency (any one of first frequency or second frequency);
k12、k13、k23: the coefficient of coup;
k13 EQ: the coefficient of coup;
L1, L1a, L1b: first coil;
L2, L2b: the second coil;
L10, L10a, L10b: the first inductor;
L3: inductor;
MC: match circuit;
RC1: the first resonance circuit;
RC2: the second resonance circuit;
VS1: the first interarea of insulating substrate;
VS2: the second interarea of insulating substrate;
Z1: the first impedance;
Z2: the second impedance;
2: electric conductor plate;
5: magnetic substance;
8:IC;
9:RFIC;
10,10A: insulating substrate;
50,50A: shell;
51: resin-case portion;
52: electric conductor plate;
60: circuit substrate;
61: device;
62: battery pack;
63: display;
100,100A, 100B, 101,103,104A, 104B: coil antenna;
301,302A, 302B, 304A, 304B, 304C: antenna assembly;
401,402A, 402B, 402C, 405,406: electronic equipment;
500: communication counterpart antenna;
600: measurement coil.
Specific embodiment
After, referring to figure and several specific examples are enumerated to show multiple modes for implementing the utility model.? In each figure, same appended drawing reference is marked to same position.It, will for the sake of convenient in view of the explanation of main points or the easiness of understanding Embodiment is separately depicted, but is able to carry out aliquot replacement or the combination of the structure shown in various embodiments.? After second embodiment, the description about the item common with first embodiment is omitted, only difference is illustrated.It is special It is not that, about the same function and effect based on same structure, will not gradually be referred in each embodiment.
" antenna assembly " shown in each embodiment can be applied to the sending side (transmission side) of signal (or electric power), receive Any one of side (power side).Even if will should " antenna assembly " as radiate magnetic flux antenna to be illustrated the case where Under, it is also not limited to the generating source that the antenna assembly is magnetic flux.In the magnetic flux for receiving transmission other side side antenna assembly generation In the case where (interlinkage), that is to say, that even if transmitting-receiving relationship on the contrary, reach same function and effect.
" antenna assembly " shown in each embodiment is for carrying out having used electromagnetic field with communication counterpart side antenna assembly Couple the antenna assembly of the near-field communication of (magnetic field coupling and field coupling) or for carrying out with power transmission other side side antenna The antenna assembly of the power transmission in the near field of electromagnetic field couples is used.In the case where communication, such as applied to NFC (Near Field communication, near-field communication) etc. communication systems.In the case where power transmission, such as applied to electricity is utilized The electrical power transmission system of the electromagnetic field couples such as magnetic induction way, magnetic resonance mode.
" antenna assembly " shown in each embodiment for example utilizes in HF frequency band, especially in 13.56MHz, 6.78MHz Or it is utilized in the frequency band near them.The size of antenna assembly is sufficiently small compared with the wavelength X under used frequency, makes Radiation efficiency with electromagnetic wave in frequency band is low.The size of antenna assembly is λ/10 or less.More specifically, the electric current road of antenna assembly The length of diameter is λ/10 or less.In addition, wavelength is the dielectricity for considering the substrate by formation conductor, magnetic conductivity referred in this Caused by wavelength shorten effect effective wavelength.
In various embodiments, so-called " electronic equipment ", refer to the portable telephone terminals such as smart phone, functional telephone, Portable PCs, video camera, game machine, the toys such as the wearable terminals such as smartwatch, intelligent glasses, notebook PC, tablet PC etc. The various electronic equipments such as the information mediums such as information equipment, IC tag, SD card, SIM card, IC card.
" first embodiment "
Fig. 1 (A) is the top view for the coil antenna 101 that first embodiment is related to, and Fig. 1 (B) is that the A-A in Fig. 1 (A) is cutd open View.Fig. 2 is the circuit diagram for the electronic equipment 401 for having antenna assembly 301 in first embodiment.In Fig. 1 (A), in order to Make to construct understandable, the second coil L2 is represented by dashed line.The RFID system of the coil antenna 101 for example for being communicated with NFC In reader or label.
Coil antenna 101 has insulating substrate 10, first coil L1 and the second coil L2.
Insulating substrate 10 is the plate for the rectangle being made of insulating material.Insulating substrate 10 has mutually opposed first Interarea VS1 (surface) and the second interarea VS2 (back side).Insulating substrate 10 is, for example, polyimides (PI), liquid crystal polymer (LCP) sheet material of thermoplastic resins such as.
First coil L1 is formed in the rectangle spiral shell of about 2 circles (winding is twice) of the first interarea VS1 of insulating substrate 10 The conductive pattern of shape is revolved, there is first end E11 and second end E12.As describing in detail below, first coil L1 structure At a part of the first resonance circuit.First coil L1 is, for example, the conductive pattern of Cu foil etc..
Second coil L2 is formed in the rectangle spiral shell of about 2 circles (winding is twice) of the first interarea VS1 of insulating substrate 10 The conductive pattern of shape is revolved, there is first end E21 and second end E22.As describing in detail below, the second coil L2 structure At a part of the second resonance circuit.Second coil L2 is, for example, the conductive pattern of Cu foil etc..
The wireline reel AX1 of first coil L1 is consistent with the wireline reel AX2 of the second coil L2.But wireline reel AX1 and winding Axis AX2 is not necessarily consistent, as long as parallel.In addition, in the present specification, so-called " wireline reel AX1 and wireline reel AX2 In parallel ", it is not meant to strictly parallel, such as refers to that wireline reel AX1 and wireline reel AX2 is 0 ° to less than ± 30 ° of range The case where.
As shown in Fig. 1 (A) and Fig. 1 (B), from Z-direction (direction wireline reel AX1 of first coil L1), first At least part of coil L1 and the second coil L2 are mutually parallel, first coil L1 radially alternating configure.In addition, In present embodiment, from Z-direction, the substantially entirety of first coil L1 and the second coil L2 are mutually parallel.
In addition, in the present specification, the so-called " radially alternating of first coil L1 and the second coil L2 in first coil Configuration ", refers to following relationship, that is, clip the second coil L2 in the radially first coil L1 of first coil L1, and first Radially the second coil L2 of coil L1 clips first coil L1.That is, referring to first coil L1 and the second coil with wireline reel The sequence of first coil L1, the second coil L2, first coil L1, the second coil L2 are pressed centered on AX1 (alternatively, pressing the second coil L2, first coil L1, the second coil L2, first coil sequence) be wound.
Alternatively, it is also possible to a part of only first coil L1 and the second coil L2 first coil L1 radially alternating Configuration.For example, in the case where first coil L1 and the second coil L2 are respectively 3 circle, it can also be centered on wireline reel AX1 First coil L1 radial direction by first coil L1, first coil L1, the second coil L2, first coil L1, the second coil L2, the The sequence of two coil L2 is wound.However, it is preferred to which first coil L1's and the second coil L2 is whole first coil L1's Configure to radially alternating.For example, in the case where first coil L1 and the second coil L2 are respectively 3 circle, preferably with wireline reel First coil L1, the second coil L2, first coil L1, the second coil L2, first are pressed in the radial direction of first coil L1 centered on AX1 Coil L1, the second coil L2 sequence (alternatively, by the second coil L2, first coil L1, the second coil L2, first coil L1, the The sequence of two coil L2, first coil L1) it is wound, and in any portion, in the radial direction of first coil L1, first coil L1 Each other or the second coil L2 is non-conterminous each other.
Fig. 2 is the circuit diagram for having the electronic equipment 401 for the antenna assembly 301 that first embodiment is related to.
As shown in Fig. 2, electronic equipment 401 has antenna assembly 301 and RFIC9 etc..In addition, being gone back in electronic equipment 401 Equipped with the component other than these.Antenna assembly 301 has coil antenna 101, first inductor L10a, L10b, first capacitor Device C10a, C10b, C11a, C11b, C12a, C12b and the second capacitor C20.First inductor L10a, L10b is, for example, piece Formula inductor.First capacitor device C10a, C10b, C11a, C11b, C12a, C12b and the second capacitor C20 is, for example, chip electricity Container.In addition, first capacitor device and the second capacitor are also possible to the line capacitance of coil.
In the present embodiment, RFIC9 is an example of " power supply circuit " in the utility model.
The first end E11 and second end E12 of first coil L1 via match circuit MC (in detail below describe) and with RFIC9 connection.The input and output of RFIC9 are balanced types.As shown in Fig. 2, first capacitor device C10a, C10b for being connected in series It is connected in parallel with the first end E11 and second end E12 of first coil L1.The tie point of first capacitor device C10a, C10b with Grounding connection.The first end E21 and second end E22 of second coil L2 is connect with the second capacitor C20.First coil L1 and Two coil L2 carries out electromagnetic field couples.
As shown in Fig. 2, including at least first coil L1 and first capacitor device C10a, C10b and constituting the first resonance circuit RC1.In addition, including at least the second coil L2 and the second capacitor C20 and constituting the second resonance circuit RC2.
In addition, though constituting the first resonance by first coil L1 and first capacitor device C10a, C10b in the present embodiment Circuit RC1, but the first resonance circuit RC1 also may include circuit constituent element in addition to this.Although in addition, in this implementation The second resonance circuit RC2 is constituted by the second coil L2 and the second capacitor C20 in mode, but the second resonance circuit RC2 can also To include circuit constituent element in addition to this.
As shown in Fig. 2, match circuit MC is connected between coil antenna 101 and RFIC9.Match circuit MC is by the first inductance Device L10a, L10b and first capacitor device C10a, C10b, C11a, C11b, C12a, C12b are constituted.In particular, the first inductor L10a, L10b also as reply EMC (Electro-Magnetic Compatibility: Electro Magnetic Compatibility) filter and It plays a role.
Fig. 3 is the perspective view for showing the positional relationship of coil antenna 101 and communication counterpart antenna 500.Fig. 4 is to show Fig. 3 Shown in coil antenna 101 and communication counterpart antenna 500 coupling mode figure.Fig. 5 be show coil antenna 101 with communicate The circuit diagram of the couple state of other side's antenna.In Fig. 5, with inductor L3 indicate Fig. 3 it is equal shown in communication counterpart antenna 500. In Fig. 4, first coil L1 and the second coil L2 are with coefficient of coup k12It is coupled, the second coil L2 and communication counterpart antenna 500 with coefficient of coup k23It is coupled.In turn, first coil L1 and communication counterpart antenna 500 are with coefficient of coup k13Carry out coupling It closes.IC (or the telecommunication circuit including IC of communication counterpart antenna 500 (inductor L3 shown in fig. 5) and communication counterpart side.Figure IC8 shown in 5) connection.
First resonance circuit RC1 carries out resonance with first frequency (resonance frequency of the first resonance circuit RC1), as the The first coil L1 of a part of one resonance circuit RC1 flows through resonance current.In addition, the second resonance circuit RC2 is with second frequency (resonance frequency of the second resonance circuit RC2) carries out resonance, in the second coil L2 of a part as the second resonance circuit RC2 Flow through resonance current.At this point, in the first coil L1 of a part as the first resonance circuit RC1 electric current flowed through around side It is identical (for example, ginseng to the circular direction of electric current flowed through with the second coil L2 in a part as the second resonance circuit RC2 According to the arrow in Fig. 1 (A)).That is, first coil L1 and the second coil L2 mutually carry out electromagnetic field couples, so that respectively flowing through Electric current circular direction become the same direction.In other words, first coil L1 and the second coil L2 mutually carry out magnetic field coupling, So that becoming same phase by the magnetic flux that the electric current respectively flowed through generates.
The antenna assembly 301 (coil antenna 101) being related to according to the present embodiment, reaches following function and effect.
(a) in the present embodiment, first coil L1 and the second coil L2 are both formed in insulating substrate 10.According to the knot Structure is not likely to produce First Line compared with the case where being respectively formed at different components with first coil L1 and the second coil L2 Enclose the deviation of the positional relationship of L1 and the second coil L2.That is, the opposite positional shift master of first coil L1 and the second coil L2 It wants factor to tail off, therefore can inhibit the variation of the degree of coupling of deviation due to the mutual positional relationship of coil, can be had The antenna assembly of stable communication characteristic.
(b) in the present embodiment, at least part of first coil L1 and the second coil L2 are mutually parallel, first Configure to the radially alternating of coil L1.According to this structure, it is respectively formed at from first coil L1 and the second coil L2 different The case where component, compares, and can shorten the distance between first coil L1 and the second coil L2.Therefore, can be improved coil that This coupling can be improved the communication characteristic of antenna assembly.
In addition, in the case where first coil L1 and the second coil L2 are respectively formed at different components, according to first The positional relationship of coil L1 and the second coil L2, coil couple in which may be insufficient each other.In addition, if coil to be made fills each other Divide ground coupling, then first coil L1 is with the positional relationship of the second coil L2 it is also possible to by limiting.On the other hand, according to above-mentioned knot Structure can improve the coupling of first coil L1 and the second coil L2 in the case where not limited by the mutual positional relationship of coil It closes.
(c) in addition, in the present embodiment, the substantially entirety of first coil L1 and the second coil L2 are mutually parallel.The The distance of part one coil L1 and the second coil L2 close to each other is longer, the coefficient of coup of first coil L1 and the second coil L2 It is higher.Therefore, the coefficient of coup for improving first coil L1 and the second coil L2 on this point, the preferred winding of first coil L1 Number is roughly the same with the winding number of the second coil L2.
(d) in the present embodiment, the wireline reel AX2 of the wireline reel AX1 of first coil L1 and the second coil L2 are parallel.It is logical Cross the structure, with the wireline reel AX1 of first coil L1 for example towards Y direction the case where compared with, can be obtained first coil L1 with The coefficient of coup k of second coil L212High antenna assembly 301.
Here, show based on the application utility model structure (first coil L1 and the second coil are mutually parallel, and The structure configured to radially alternating) the coefficient of coup improvement effect (referring to above-mentioned (b)).
Fig. 6 (A) is the top view of the coil antenna 100A of the single resonance as comparative example, and Fig. 6 (B) is as another ratio Compared with the top view of the coil antenna 100B of example.The difference for the coil antenna 101 that coil antenna 100A and first embodiment are related to Point is, only forms the first coil L1a of about 4 circles (winding four times) on the surface of insulating substrate 10.Coil antenna 100B With coil antenna 101 the difference lies in that being configured with about 2 circles in the inside of the first coil L1b of about 2 circles (winding is twice) The second coil L2b of (winding is twice).Size, other structures about coil antenna 100A, 100B, with 101 phase of coil antenna Together.
Coil antenna 100A, 100B of above-mentioned comparative example and each coupled systemes of coil antenna of the present embodiment 101 Several values is as follows.
[table 1]
Each coefficient of coup shown in table 1 is as follows.
k12: the coefficient of coup of first coil and the second coil;
k13: the coefficient of coup of first coil and communication counterpart antenna;
k23: the coefficient of coup of the second coil and communication counterpart antenna;
k13 EQ: it include the second resonance circuit, first coil and communication counterpart antenna the equivalent coefficient of coup.
k13 EQIt is found out by following formula.
[mathematical expression 1]
In addition, factor alpha is by resonance frequency fR(any one of first frequency or second frequency) and third frequency f The coefficient that (carrier frequency used) is found out.
Factor alpha is found out by following formula.
[mathematical expression 2]
Fig. 7 is to show resonance frequency fRWith the figure of the relationship of factor alpha.In addition, third frequency f is set as in Fig. 7 13.56MHz.As shown in fig. 7, in resonance frequency fRIn the case where third frequency f high, factor alpha becomes negative value.Therefore, formula (1) Section 2 of the molecule on the right becomes positive value, k13 EQBecome larger.That is, can make to communicate by the multiplication effect of complex resonance Characteristic improves.On the other hand, as shown in fig. 7, in resonance frequency fRIn the case where lower than third frequency f, factor alpha becomes positive Value, therefore the Section 2 of the molecule on the right of formula (1) becomes negative value, k13 EQAs positive value and become smaller or k13 EQAs negative Value.That is, the effect that communication characteristic cannot be made to improve by complex resonance.According to the above, being preferably set to resonance frequency fRThan Third frequency f high, so that factor alpha becomes negative value.
Like this, mutually matched parallel and in the radially alternating of first coil L1 by first coil L1 and the second coil It sets, thus the coefficient of coup k of first coil L1 and the second coil L212It improves, coefficient of coup k13 EQIt improves.
Furthermore it is preferred that resonance frequency fR(first frequency f1Or second frequency f2Any one of) than third frequency f high.By This, coefficient of coup k13 EQIt improves.
In addition, preferably satisfying condition below to improve the communication performance with communication counterpart antenna.Fig. 8 is to show The figure of first impedance Z 1 and the second impedance Z 2 and the relationship of frequency.
For example, it is preferable to first frequency f1And second frequency f2For 0.5 times or more and third frequency f of third frequency f 2 Times or less (0.5f≤f1≤2f)(0.5f≤f2≤2f).In addition, for example, it is preferable to 2 (second frequency f of the second impedance Z2Under second The impedance of resonance circuit) it is 1 (first frequency f of the first impedance Z1Under the first resonance circuit impedance) 0.5 times or more and 2 times or less (0.5Z1≤Z2≤2Z1) of one impedance Z 1.
The of first coil as a part of the first resonance circuit and a part as the second resonance circuit as a result, Two coil couples strongly, as a result, the communication characteristic with communication counterpart antenna improves.
" second embodiment "
In this second embodiment, the electricity that show circuit structure different from the electronic equipment 401 that first embodiment is related to Sub- equipment.
Fig. 9 (A) is the circuit diagram for the electronic equipment 402A that second embodiment is related to, and Fig. 9 (B) is that second embodiment relates to And another electronic equipment 402B circuit diagram.Figure 10 is the electricity for another electronic equipment 402C that second embodiment is related to Lu Tu.
The electronics that the circuit structure of the antenna assembly of electronic equipment 402A, 402B, 402C is related to first embodiment is set Standby 401 is different.In addition, in the present embodiment, RFIC9 is single-ended.About the other of electronic equipment 402A, 402B, 402C Structure, it is substantially the same with electronic equipment 401.
Hereinafter, the part different to the electronic equipment 401 being related to from first embodiment is illustrated.
As shown in Fig. 9 (A), electronic equipment 402A has antenna assembly 302A and RFIC9.Antenna assembly 302A has line Enclose antenna 101, the first inductor L10, first capacitor device C10, C11, C12 and the second capacitor C20.First inductor L10 And first capacitor device C11 is connected in series between first coil L1 and RFIC9.First capacitor device C10 and first coil L1 First end E11 and second end E12 be connected in parallel.Input and output (or of the first capacitor device C12 relative to RFIC9 The first end E11 and second end E12 of one coil L1) it is connected in parallel.
In electronic equipment 402A, including first coil L1 and first capacitor device C10, C11 and constitute the first resonance electricity Road RC1.
As shown in Fig. 9 (B), electronic equipment 402B has antenna assembly 302B and RFIC9.Antenna assembly 302B has line Enclose antenna 101, the first inductor L10, first capacitor device C11, C12 and the second capacitor C20.First inductor L10 and First capacitor device C11 is connected in series between first coil L1 and RFIC9.Input of the first capacitor device C12 relative to RFIC9 Output (or first end E11 and second end E12 of first coil L1) is connected in parallel.
In electronic equipment 402B, including first coil L1 and first capacitor device C11, C12 and constitute the first resonance electricity Road RC1.
As shown in Figure 10, electronic equipment 402C has antenna assembly 302C and RFIC9.Antenna assembly 302C has first Inductor L10, first capacitor device C11a, C11b, C12 and the second capacitor C20.First inductor L10 and first capacitor Device C11a, C11b are connected in series between first coil L1 and RFIC9.First capacitor device C12 is defeated relative to the input of RFIC9 (or first end E11 and second end E12 of first coil L1) is connected in parallel out.
In electronic equipment 402C, including first coil L1 and first capacitor device C11a, C11b, C12 and constitute first Resonance circuit RC1.
Like this, the application utility model can also be applied to the telecommunication circuit that input and output are single-ended.
" third embodiment "
In the third embodiment, the example that antenna assembly (coil antenna) has magnetic substance is shown.
Figure 11 is the cross-sectional view for the coil antenna 103 that third embodiment is related to.
The coil antenna 101 that coil antenna 103 and first embodiment are related to the difference lies in that being also equipped with magnetic substance 5. It is identical as coil antenna 101 about the other structures of coil antenna 103.
Hereinafter, the part different to the coil antenna 101 being related to from first embodiment is illustrated.
As shown in figure 11, magnetic substance 5 is pasted in the second interarea VS2 of insulating substrate 10.Magnetic substance 5 is, for example, magnetic substance Ferritic plate.
The coil antenna 103 being related to according to the present embodiment, other than the effect described in the first embodiment, Also achieve the effect that as follows.
(e) coil antenna 103 of the present embodiment has magnetic substance 5.With this configuration, coil day can not made The coil antenna of given inductance is obtained in the case where 103 enlargement of line.In addition, passing through the poly- magnetic effect of magnetic substance 5, first coil The magnetic field coupling of the magnetic field coupling of L1 and the second coil L2, first coil L1 and communication counterpart antenna improves.
(f) coil antenna 103 of the present embodiment is configured with magnetic substance in the second side interarea VS2 of insulating substrate 10 5.According to this structure, by the Magnetic Shielding Effectiveness of magnetic substance 5, the magnetic field from coil antenna 103 is able to suppress to the second interarea The radiation of the side VS2.Therefore, even if also can inhibit in the case where other conductors are close to the second interarea side VS2 of insulating substrate 10 Other conductors are stated to couple with the unnecessary of coil antenna.
" the 4th embodiment "
In the fourth embodiment, the example for being also equipped with the antenna assembly of electric conductor plate is shown.
Figure 12 (A) is the top view for the antenna assembly 304A that the 4th embodiment is related to, and Figure 12 (B) is to show Figure 12 (A) Shown in antenna assembly 304A and communication counterpart antenna 500 positional relationship perspective view.Antenna assembly 304A has coil day Line 101 and electric conductor plate 2.In addition, though including other than coil antenna 101 and electric conductor plate 2 in antenna assembly 304A Structure, but the illustration is omitted in Figure 12 (A) and Figure 12 (B).
The antenna assembly 301 that antenna assembly 304A and first embodiment are related to the difference lies in that being also equipped with by near line Enclose the electric conductor plate 2 of antenna 101.Coil antenna 101 is identical as what is illustrated in the first embodiment.About antenna assembly 304A Other structures, it is identical as antenna assembly 301.Hereinafter, being illustrated to the part being different from the first embodiment.
Electric conductor plate 2 is the plate of rectangle.Electric conductor plate 2 is, for example, the shell for the electronic equipment being made of metal, graphite etc. A part of body or the earth conductor for being formed in circuit substrate.In addition, as described later, electric conductor plate 2 is for example also possible to The metal part (conductor part) for the battery pack that the enclosure interior of electronic equipment accommodates.In addition, electric conductor plate 2 is for example also possible to In the component including metal of the barricade that the enclosure interior of electronic equipment accommodates etc..In addition, electric conductor plate 2 is not necessarily square Shape, such as it is also possible to the shapes such as circle.
As shown in Figure 12 (A), from Z-direction (direction wireline reel AX1 of first coil L1), antenna assembly 304A's Electric conductor plate 2 have the part Chong Die with first coil L1 and the second coil L2 and not with first coil L1 and the second coil The part of L2 overlapping.Electric conductor plate 2, which is located at, leans on -Z direction than first coil L1 and the second coil L2 (insulating substrate 10).
Figure 13 (A) is the top view for another antenna assembly 304B that the 4th embodiment is related to, and Figure 13 (B) is to show figure The perspective view of the positional relationship of antenna assembly 304B shown in 13 (A) and communication counterpart antenna 500.Antenna assembly 304B has line Enclose antenna 101 and electric conductor plate 2.In addition, though including coil antenna 101 and electric conductor plate 2 in antenna assembly 304B Structure in addition, but the illustration is omitted in Figure 13 (A) and Figure 13 (B).
The position of the electric conductor plate 2 of antenna assembly 304B is different from above-mentioned antenna assembly 304A.Hereinafter, to traditional thread binding with day The different part 304A is set to be illustrated.
As shown in Figure 13 (A), the electric conductor plate 2 of antenna assembly 304B is located at than first coil L1 and the second coil L2 (insulating substrate 10) leans on +Z direction.In other words, electric conductor plate 2 is configured at first coil L1 and the second coil in the Z-axis direction Between L2 and communication counterpart antenna.
Figure 14 (A) is the top view for another antenna assembly 304C that the 4th embodiment is related to, and Figure 14 (B) is to show figure The perspective view of the positional relationship of antenna assembly 304C shown in 14 (A) and communication counterpart antenna 500.Antenna assembly 304C has line Enclose antenna 101 and electric conductor plate 2.In addition, though including coil antenna 101 and electric conductor plate 2 in antenna assembly 304C Structure in addition, but the illustration is omitted in Figure 14 (A) and Figure 14 (B).
The position of the electric conductor plate 2 of antenna assembly 304C is different from above-mentioned antenna assembly 304A, 304B.Hereinafter, to Antenna assembly 304A, 304B different parts are illustrated.
As shown in Figure 14 (A), from Z-direction, the electric conductor plate 2 of antenna assembly 304C not with first coil L1 and Second coil L2 (insulating substrate 10) overlapping.Electric conductor plate 2 is configured close to first coil L1 and the second coil L2.
According to the present embodiment, electric conductor plate 2 is coupled with first coil L1 and the second coil L2,2 conduct of electric conductor plate The gain antenna of first coil L1 and the second coil L2 is functioned, therefore communication characteristic improves.
Then, illustrate that electric conductor plate is influenced on the coefficient of coup bring of communication counterpart antenna.Figure 15 (A) is to show line It encloses antenna 100 and measures the perspective view of the positional relationship of coil 600, Figure 15 (B) is to show coil antenna 100 and measurement coil The main view of 600 positional relationship.Figure 16 is the top view of coil antenna 100.
Coil antenna 100 has first coil L1, the second coil L2 and insulating substrate 10A.First coil L1 and Two coil L2 is formed in the first interarea VS1 of insulating substrate 10A.Insulating substrate 10A is longitudinal direction and the consistent square of Y direction The plate of shape.The first side interarea VS1 of insulating substrate 10A is arranged in electric conductor plate 2.As shown in figure 16, first coil L1 and A part of the outer rim of the outer rim and insulating substrate 10A of second coil L2 is consistent.
In Figure 15 (B) and Figure 16, the size of each section is as follows.
X1 (length in the X-direction of first coil L1 and the second coil L2): 45mm
X2 (length in the X-direction of electric conductor plate 2): 70mm
Y1 (length in the Y direction of electric conductor plate 2): 130mm
Y2 (distance in the Y direction of the outer rim from the outer rim of insulating substrate 10A to electric conductor plate 2): 15mm
D1 (diameter of measurement coil 600):
D2 (length in the Y direction of first coil L1 and the second coil L2): 9~30mm
H1 (the distance between first coil L1 and the second coil L2 and measurement coil 600): 25mm
Figure 17 is the coefficient of coup k for showing coil antenna 100 and measuring coil13 EQFigure.Figure 17, which is shown, makes D2 (First Line Enclose the length in the Y direction of L1 and the second coil L2) (referring to Fig.1 6 in arrow) coil in 9mm~30mm variation The coefficient of coup of antenna 100 and measurement coil.In addition, in order to be compared, also illustrating in Figure 17 and not having electric conductor plate 2 coil antenna and the coefficient of coup of measurement coil.
As shown in figure 17, have the coil antenna 100 of electric conductor plate 2 compared with the coil antenna for not having electric conductor plate 2, With the coefficient of coup k of measurement coil (600)13 EQIt is higher on the whole.Accordingly it is found that close to coil antenna electric conductor plate 2 In the presence of facilitating coefficient of coup k13 EQRaising.
In addition, because of Y2=15mm, if D2 is more than 15mm, first coil L1 and the second coil L2 and electric conductor Plate 2 is overlapped.Moreover, even more than D=15mm, the coefficient of coup k of coil antenna 100 and measurement coil (600)13 EQAlso it improves. Accordingly it is found that the case where a part of first coil L1 and the second coil L2 are Chong Die with electric conductor plate 2 is compared to first coil The case where L1 and the second coil L2 not Chong Die with electric conductor plate 2, the coefficient of coup k with measurement coil (600)13 EQIt is higher.
It is therefore preferable that as coil antenna 104A, 104B of the present embodiment, from Z-direction, electric conductor Plate 2 has the part Chong Die with first coil L1 and the second coil L2 and not Chong Die with first coil L1 and the second coil L2 Part.
Although, can also be in electric conductor in addition, in the not formed slit of electric conductor plate 2 of present embodiment, opening etc. Plate 2 is formed with slit, opening.Thereby, it is possible to further increase the function as gain antenna of electric conductor plate 2.
" the 5th embodiment "
In the 5th embodiment, the example for having the electronic equipment of antenna assembly of the utility model is shown.
Figure 18 (A) is the top view for showing the construction of enclosure interior for the electronic equipment 405 that the 5th embodiment is related to, figure 18 (B) are the B-B cross-sectional views in Figure 18 (A).
Electronic equipment 405 has shell 50, antenna assembly (coil antenna 101), circuit substrate 60, device 61, battery pack 62, display 63 and power supply circuit (illustration omitted) etc..Although including the knot other than coil antenna 101 in antenna assembly Structure, but the illustration is omitted in Figure 18 (A) and Figure 18 (B).
Coil antenna 101, circuit substrate 60, device 61, battery pack 62, display 63 etc. are contained in the inside of shell 50. Coil antenna 101 is attached at the inner surface of shell 50, and connect with power supply circuit (illustration omitted).It is installed on circuit substrate 60 There is device 61 etc..Device 61 is, for example, the terminal of camara module, flash lamp, loudspeaker, earphone jack, card slot, USB etc., presses The devices such as button, sensor.
Although not shown, still including conductor part (for example, metal part of exterior etc.) in battery pack 62.Such as Shown in Figure 18 (A), from Z-direction (direction wireline reel AX1 of first coil L1), first coil L1 and the second coil L2 With the part Chong Die with battery pack 62 and part not Chong Die with battery pack 62.
In the present embodiment, the conductor part (metal part) for including in the battery pack 62 is equivalent in the utility model " electric conductor plate ".
Like this, as " the electric conductor plate " in the utility model, it also can use the component that electronic equipment is set Conductor part.According to this structure, it is not necessary that electric conductor plate is separately arranged, therefore the manufacture of antenna assembly becomes easy, and can seek low Cost.
In addition, though in the present embodiment using the conductor part of battery pack 62 as " electric conductor plate " Lai Liyong, still It's not limited to that.For example, it is also possible to using the conductor at the back side that display is arranged in as " electric conductor plate " Lai Liyong.In addition, For example, it is also possible to which the conductive pattern of circuit substrate will be formed in as " electric conductor plate " Lai Liyong.
" sixth embodiment "
In sixth embodiment, the example that a part of shell is utilized as to the electronic equipment of electric conductor plate is shown.
Figure 19 is the cross-sectional view for showing the construction of enclosure interior for the electronic equipment 406 that sixth embodiment is related to.
The electronic equipment 405 that electronic equipment 406 and the 5th embodiment are related to the difference lies in that having shell 50A.It closes It is identical as electronic equipment 405 in the other structures of electronic equipment 406.Hereinafter, being carried out to the part different from electronic equipment 405 Explanation.
Shell 50A has resin-case portion 51 and electric conductor plate 52.As shown in figure 19, from Z-direction (first coil L1 The direction wireline reel AX1) observation, electric conductor plate 52 have the part Chong Die with first coil L1 and the second coil L2 and not with The part of first coil L1 and the second coil L2 overlapping.
Even such structure, also reach function and effect same as the electronic equipment 405 that the 5th embodiment is related to.
" other embodiment "
Although showing the example for the plate that insulating substrate is rectangle in each embodiment illustrated above, not It is defined in the structure.The shape of insulating substrate can suitably carry out in the range of having the function that the utility model, effect Change, such as flat shape may be polygon, circle, ellipse, L-shaped, crank shape, T-shaped, Y-shaped etc..In addition, Insulating substrate is not limited to plate, such as be also possible to cuboid, cube, polygon prism, cylinder, cylindroid etc..In turn, absolutely Edge substrate is also possible to the laminated body for forming multiple insulation layer stackups.It is formed alternatively, it is also possible to the surface in insulating substrate The protective films such as solder mask, covering layer film.
Although showing the example for the sheet material that insulating substrate is thermoplastic resin in each embodiment illustrated above, It is to be not limited to the structure.Insulating substrate is for example also possible to the sheet material of the heat-curing resins such as epoxy resin.In addition, insulation Substrate is for example also possible to the dielectric ceramic of low-temperature co-fired ceramics (LTCC).
In addition, the first coil L1 and the shape of the second coil L2, winding number in the utility model be not limited to Shown on each embodiment structure, can suitably be become in the range of having the function that the utility model, effect More.The shape of first coil L1 and the second coil L2 are not limited to rectangular coil shape, such as are also possible to round spiral Or elliptical spiral shape.In addition, the winding number of first coil L1 and the second coil L2 can also be more than 2 circles.In addition, though The winding number of winding number and the second coil L2 that first coil L1 is shown in each embodiment illustrated above is roughly the same Example, but it is not limited to the structure.The winding number of first coil L1 and the second coil L2 can also be different.But in order to The coefficient of coup of first coil L1 and the second coil L2 are improved, preferably the winding number (n) of first coil L1 is with the second coil L2's The difference of winding number (m) is within ± 1 (n-1≤m≤n+1).
Although showing first coil L1 in each embodiment illustrated above and the second coil L2 being formed in insulation The example of first interarea VS1 of substrate 10, but it is not limited to the structure.That is, being not limited to first coil L1 and second Coil L2 is formed in the same plane, for example, can also first coil L1 be formed in the first interarea VS1 of insulating substrate 10, the second line Circle L2 is formed in the second interarea VS2.
Finally, the explanation of above-mentioned embodiment is to illustrate in all aspects, it is not restrictive.To this field For technical staff, it can be suitably deformed and change.The scope of the utility model is not by above-mentioned embodiment It shows, but is shown in the claims.It in turn, include from the range etc. with claims in the scope of the utility model The change that embodiment in same range carries out.

Claims (10)

1. a kind of antenna assembly, which is characterized in that have:
Insulating substrate;
First coil is connect with power supply circuit, is constituted a part of the first resonance circuit, is formed in the insulating substrate, and roll up Around multiple;And
Second coil constitutes a part of the second resonance circuit, is formed in the insulating substrate, and winds repeatedly,
The wireline reel of the first coil is parallel with the wireline reel of second coil,
From the winding axis direction of the first coil, at least part phase of the first coil and second coil It is mutually parallel, and radially alternately configuring in the first coil so that the first coil clip second coil and Second coil clips the first coil,
About the first coil and second coil, in the electric current that the first coil and second coil flow through Circular direction become the same direction, mutually progress electromagnetic field couples.
2. antenna assembly according to claim 1, which is characterized in that
Be also equipped with: first capacitor device is connect with the first coil, constitutes a part of first resonance circuit.
3. antenna assembly according to claim 1 or 2, which is characterized in that
Be also equipped with: the second capacitor is connect with second coil, constitutes a part of second resonance circuit.
4. antenna assembly according to claim 1 or 2, which is characterized in that
It is also equipped with magnetic substance.
5. antenna assembly according to claim 1 or 2, which is characterized in that
The resonance frequency of first resonance circuit is set as first frequency, by first resonance electricity under the first frequency The impedance on road is set as the first impedance,
The resonance frequency of second resonance circuit is set as second frequency, by second resonance electricity under the second frequency The impedance on road is set as the second impedance,
The carrier frequency used is set as third frequency, at this point,
The first frequency and the second frequency be 0.5 times or more and 2 times of the third frequency hereinafter,
Second impedance is 0.5 times or more and 2 times or less of first impedance.
6. antenna assembly according to claim 1 or 2, which is characterized in that
It is also equipped with electric conductor plate,
From the winding axis direction of the first coil, the electric conductor plate has and the first coil and described The part and part not Chong Die with the first coil and second coil of second coil overlapping.
7. a kind of electronic equipment, which is characterized in that
Have shell, antenna assembly and power supply circuit,
The antenna assembly includes
Insulating substrate;
First coil constitutes a part of the first resonance circuit, is formed in the insulating substrate, and winds multiple;And
Second coil constitutes a part of the second resonance circuit, is formed in the insulating substrate, and winds repeatedly,
The wireline reel of the first coil is parallel with the wireline reel of second coil,
From the winding axis direction of the first coil, at least part phase of the first coil and second coil It is mutually parallel, and radially alternately configuring in the first coil so that the first coil clip second coil and Second coil clips the first coil,
About the first coil and second coil, in the electric current that the first coil and second coil flow through Circular direction become the same direction, mutually progress electromagnetic field couples,
The first coil is connect with the power supply circuit.
8. electronic equipment according to claim 7, which is characterized in that
It is also equipped with electric conductor plate,
From the winding axis direction of the first coil, the electric conductor plate has and the first coil and described The part and part not Chong Die with the first coil and second coil of second coil overlapping.
9. electronic equipment according to claim 8, which is characterized in that
The electric conductor plate is a part of the shell.
10. electronic equipment according to claim 8, which is characterized in that
The electric conductor plate is the metal part of the battery pack accommodated in the electronic equipment.
CN201920337425.XU 2018-04-18 2019-03-15 Antenna assembly and electronic equipment Active CN209448023U (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
JP2018079601A JP2019192951A (en) 2018-04-18 2018-04-18 Antenna device and electronic apparatus
JP2018-079601 2018-04-18

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Publication Number Publication Date
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CN (1) CN209448023U (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112259349A (en) * 2020-10-14 2021-01-22 浙江大学 Self-resonance coil of wireless power transmission system

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112259349A (en) * 2020-10-14 2021-01-22 浙江大学 Self-resonance coil of wireless power transmission system

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