CN101859923A - Antenna - Google Patents
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- CN101859923A CN101859923A CN201010154724A CN201010154724A CN101859923A CN 101859923 A CN101859923 A CN 101859923A CN 201010154724 A CN201010154724 A CN 201010154724A CN 201010154724 A CN201010154724 A CN 201010154724A CN 101859923 A CN101859923 A CN 101859923A
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- 239000004020 conductor Substances 0.000 claims abstract description 149
- 239000000758 substrate Substances 0.000 claims description 27
- 230000015572 biosynthetic process Effects 0.000 claims description 6
- 238000004891 communication Methods 0.000 description 11
- 230000008878 coupling Effects 0.000 description 10
- 238000010168 coupling process Methods 0.000 description 10
- 238000005859 coupling reaction Methods 0.000 description 10
- 230000000694 effects Effects 0.000 description 7
- 239000000696 magnetic material Substances 0.000 description 4
- BGOFCVIGEYGEOF-UJPOAAIJSA-N helicin Chemical compound O[C@@H]1[C@@H](O)[C@H](O)[C@@H](CO)O[C@H]1OC1=CC=CC=C1C=O BGOFCVIGEYGEOF-UJPOAAIJSA-N 0.000 description 3
- 239000008358 core component Substances 0.000 description 2
- 230000004907 flux Effects 0.000 description 2
- 229910000859 α-Fe Inorganic materials 0.000 description 2
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 239000000306 component Substances 0.000 description 1
- 230000005672 electromagnetic field Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06K—GRAPHICAL DATA READING; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
- G06K19/00—Record carriers for use with machines and with at least a part designed to carry digital markings
- G06K19/06—Record carriers for use with machines and with at least a part designed to carry digital markings characterised by the kind of the digital marking, e.g. shape, nature, code
- G06K19/067—Record carriers with conductive marks, printed circuits or semiconductor circuit elements, e.g. credit or identity cards also with resonating or responding marks without active components
- G06K19/07—Record carriers with conductive marks, printed circuits or semiconductor circuit elements, e.g. credit or identity cards also with resonating or responding marks without active components with integrated circuit chips
- G06K19/077—Constructional details, e.g. mounting of circuits in the carrier
- G06K19/07749—Constructional details, e.g. mounting of circuits in the carrier the record carrier being capable of non-contact communication, e.g. constructional details of the antenna of a non-contact smart card
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/27—Adaptation for use in or on movable bodies
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q7/00—Loop antennas with a substantially uniform current distribution around the loop and having a directional radiation pattern in a plane perpendicular to the plane of the loop
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q7/00—Loop antennas with a substantially uniform current distribution around the loop and having a directional radiation pattern in a plane perpendicular to the plane of the loop
- H01Q7/06—Loop antennas with a substantially uniform current distribution around the loop and having a directional radiation pattern in a plane perpendicular to the plane of the loop with core of ferromagnetic material
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- Engineering & Computer Science (AREA)
- Computer Hardware Design (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Theoretical Computer Science (AREA)
- Details Of Aerials (AREA)
- Support Of Aerials (AREA)
Abstract
It is elongated and make the longest position of distance that can communicate by letter be positioned at the antenna of the approximate center of framework to the invention provides a kind of longest distance that can communicate by letter that can make.Constitute aerial coil (21) by magnetic core (1) and coil-conductor (CW).Aerial coil disposes near one side (S) of the regulation of planar conductor (2).In coil-conductor (CW), near first conductor part (11) of first interarea (MS1) of magnetic core with near second conductor part (12) of second interarea (MS2) of magnetic core, be configured to when the normal direction of first interarea (MS1) of magnetic core or second interarea (MS2) is watched not overlapping.And,, dispose second conductor part and first conductor part according to second conductor part (12) is in than the mode of first conductor part (11) further from the position relation at the center of planar conductor (2).And the coil axes (CA) of coil-conductor (CW) is vertical with respect to one side (S) of planar conductor (2).
Description
Technical field
The present invention relates to the antenna that utilized in RFID (RadioFrequency Identification) system of communicating by electromagnetic field signal and external equipment etc.
Background technology
The antenna that carries on the portable electric appts that uses in rfid system is disclosed in the patent documentation 1.Fig. 1 is the front view of structure of the antenna assembly of expression patent documentation 1 record.
[patent documentation 1] TOHKEMY 2002-325013 communique
Its back side of magnetic material antenna of patent documentation 1 shown in Figure 1 is metallic plate, and the magnetic line of force passes along horizontal (being direction from right to left under state shown in Figure 1), produces electromotive force thus in coil-conductor, and streaming current.
But as shown in Figure 1, the magnetic material antenna of patent documentation 1 is the structure with the magnetic line of force coupling parallel with conductive plate 34 behind.Therefore, for example be equipped under the situation of mobile telephone terminal, in the time of on the circuit substrate that is installed in framework inside abreast, can't covering mobile telephone terminal abreast with respect to read-write (reader/writer) face and use.In addition, in the time of near the center that aerial coil is placed conductive plate 34, can only in short-range, communicate by letter, and the position that obtains maximum communication distance is in from the bigger position of framework misalignment, so there is the problem of operating position difference.
Summary of the invention
The object of the present invention is to provide a kind of longest distance that to communicate by letter that can make elongated and make the longest position of distance that to communicate by letter be positioned at the antenna of framework approximate center.
In order to solve above-mentioned problem, in antenna of the present invention, aerial coil is near the planar conductor configuration, and described aerial coil possesses: the tabular magnetic core with first interarea and second interarea; With the coil-conductor that is wound on this magnetic core; This antenna is characterised in that, first interarea and the described planar conductor of described magnetic core are opposed, described planar conductor is that essentially rectangular is tabular, described aerial coil is configured to the one side than the more close regulation in center of described planar conductor, second conductor part of second interarea of first conductor part of first interarea of close described magnetic core and close described magnetic core in the described coil-conductor, be positioned at nonoverlapping position when the normal direction of first interarea of described magnetic core or second interarea is watched, second conductor part is configured in than the position of first conductor part further from the center of described planar conductor, and the coil axes of described coil-conductor is vertical with respect to described one side of described planar conductor.
In addition, described coil-conductor is the shape after the coil of vortex shape (helical) is cut by the cut-off lines of edge regulation, and described flexible substrate surrounds the four sides of described magnetic core, is engaged with each other at the described conductive pattern of described cut-off lines part.
In addition, described coil-conductor is helical form (spiral), and described flexible substrate surrounds three of described magnetic core.
In addition, described coil-conductor is a helical form, and described flexible substrate possesses through hole at the center of the formation position of described coil-conductor, and described magnetic core is inserted in the described through hole.
In addition, be made as W and will be the length of the described magnetic core of right angle orientation when being made as Y at the width of narrow part that will connect the coil-conductor between described first conductor part and described second conductor part, be defined as the relation of W 〉=Y with respect to described one side of described planar conductor.
In addition, the end of the magnetic line of force of described magnetic core discrepancy is thicker than other parts.
In addition, will be from the end of the described antenna of a side near being made as X and will being the length of the described magnetic core of right angle orientation when being made as Y, be defined as the relation of Y＞X with respect to described one side of described planar conductor to the distance on described one side of described planar conductor apart from described one side of described planar conductor.
In addition, described planar conductor is for installing the circuit substrate of described aerial coil.
(invention effect)
According to the present invention, can make the longest distance that to communicate by letter elongated and make the longest position of distance that to communicate by letter be positioned at the approximate center of framework.
Description of drawings
Fig. 1 is the front view of structure of the antenna assembly of expression patent documentation 1 record.
Fig. 2 is the figure of the structure of expression magnetic material antenna of first execution mode and antenna assembly.
Fig. 3 (A) is the distribution of the magnetic line of force of the described antenna 101 of expression and the figure of directive property, and Fig. 3 (B) is the distribution of the magnetic line of force of the antenna of structure in the past represented for the antenna with first execution mode compares of expression and the figure of directive property.
Fig. 4 is the figure that is illustrated in the state that communicates between the electronic equipment such as mobile telephone terminal of the antenna 101 that possesses first execution mode and the IC-card that RFID uses.
Fig. 5 is the longest distance that can communicate by letter of expression with respect to the figure of the relation of the skew between the center of the framework of the electronic equipment of the antenna 101 of taking in first execution mode and the center of reading and writing the side antenna.
Fig. 6 is the figure that the position relation of planar conductor 2 and aerial coil 21 is represented.
Fig. 7 (A) is the vertical view that the position relation of planar conductor 2 and aerial coil 21 is represented.Fig. 7 (B) is the figure at the relation of the aerial coil 21 of first execution mode and aerial coil 20 expression distance X of constructing and coupling coefficient in the past.
Fig. 8 (A) is the figure of the state before the assembling of aerial coil 22 of expression second execution mode, and Fig. 8 (B) is the vertical view of this aerial coil 22 of expression.
Fig. 9 (A) is the upward view of antenna 102 that expression possesses the aerial coil 22 of second execution mode, and Fig. 9 (B) is its front view.Fig. 9 (C) is that expression is fixed on aerial coil 22 example of taking in as framework 202 inboards of the planar conductor 2 of circuit substrate.
Figure 10 (A) is the preceding vertical view of assembling of the aerial coil 23 of expression the 3rd execution mode, and Figure 10 (B) is the vertical view of this aerial coil 23.
Figure 11 (A) is the upward view of antenna 103 that expression possesses the aerial coil 23 of the 3rd execution mode, and Figure 11 (B) is its front view.Figure 11 (C) is fixed on the example of taking in as framework 203 inboards of the planar conductor 2 of circuit substrate with aerial coil 23.
Figure 12 is that the width in the narrowest part that will connect coil-conductor between first conductor part 11 and second conductor part 12 is made as W and will will be the length of the magnetic core of right angle orientation when being made as Y with respect to one side of planar conductor, is illustrated in the figure of the relation between the W and coupling coefficient when under the long-pending certain situation that makes W and Y W being changed.
Figure 13 (A) is the preceding vertical view of assembling of the aerial coil 24A of the 4th execution mode, and Figure 13 (B) is the vertical view of this aerial coil 24A.
Figure 14 (A) is the preceding vertical view of assembling of another aerial coil 24B of the 4th execution mode, and Figure 14 (B) is the vertical view of this coil antenna 24B.
Figure 15 (A) is the preceding vertical view of assembling of the another aerial coil 24C of the 4th execution mode, and Figure 15 (B) is the vertical view of this coil antenna 24C.
Figure 16 (A) is the preceding vertical view of assembling of the aerial coil 25 of the 5th execution mode, and Figure 16 (B) is the vertical view of this coil antenna 25, and Figure 16 (C) is the upward view of aerial coil 25.
Figure 17 (A) is the upward view of antenna 104 that possesses the aerial coil 25 of the 5th execution mode, and Figure 17 (B) is its front view.Figure 17 (C) is fixed on the example of taking in as framework 204 inboards of the planar conductor 2 of circuit substrate with aerial coil 25.
Figure 18 (A) is the preceding vertical view of assembling of the aerial coil 26A of the 6th execution mode, and Figure 18 (B) is the vertical view of this aerial coil 26A.
Figure 19 (A) is the preceding vertical view of assembling of another antenna 26B of the 6th execution mode, and Figure 19 (B) is the vertical view of this aerial coil 26B.
Figure 20 (A) is the preceding vertical view of assembling of the another aerial coil 26C of the 6th execution mode, and Figure 20 (B) is the vertical view of this aerial coil 26C.
Among the figure: A-Consistent through hole, CA-coil axes, CW-coil-conductor, DB-directional beam, the H-magnetic line of force, MS1-first interarea, MS2-second interarea, S-are on one side, 1-magnetic core, 2-planar conductor, 10-flexible substrate, 11-first conductor part, 12-second conductor part, 21～23-aerial coil, 24A, 24B, 24C-aerial coil, the 25-aerial coil, 26A, 26B, 26C-aerial coil, 100～104-antenna, 201～204-framework, 301-read-write side antenna, 401-IC card.
Embodiment
" first execution mode "
Fig. 2 is the figure of formation of the antenna of expression first execution mode.
Fig. 2 (A) is the stereogram of antenna 101, and this antenna 101 possesses: the aerial coil 21 and planar conductor 2 of rectangular plate shape of the circuit substrate etc. of this aerial coil 21 is installed.Fig. 2 (B) is the front view of above-mentioned antenna 101.
Above-mentioned aerial coil 21 is configured to than one side of the more close regulation in center of planar conductor 2 (limit on the right side among Fig. 2) S.In addition, first conductor part 11 and second conductor part 12 are configured to when the normal direction of the first interarea MS1 of magnetic core 1 or the second interarea MS2 is watched (perspective) not overlapping.And,, dispose second conductor part 12 and first conductor part 11 according to second conductor part 12 is in than the mode of first conductor part 11 further from the position relation at the center of planar conductor 2.And the coil axes CA of coil-conductor CW is vertical with respect to above-mentioned one side S of planar conductor 2.
Fig. 3 (A) is the distribution of the magnetic line of force of the above-mentioned antenna 101 of expression and the figure of directive property.In addition, Fig. 3 (B) is the distribution of the magnetic line of force of the antenna of structure in the past represented for the antenna with first execution mode compares of expression and the figure of directive property.Above-mentioned antenna 101 is configured to its aerial coil 21 and is in than the position of planar conductor 2 more close read-write side antennas 301 relation.This state is the state of electronic equipment covering on the reading part of read-write that is built-in with above-mentioned antenna 101.
Because second conductor part 12 is positioned at than the outside of first conductor part 11 further from the center of planar conductor 2 in above-mentioned coil-conductor CW, so the major axis of ring of magnetic line of force H of magnetic core that passes through aerial coil 21 is as shown in the figure with respect to the face tilt of planar conductor 2.That is, the component of the normal direction of planar conductor 2 (Z-direction) strengthens.Relative therewith, the directional beam DB of antenna 101 is towards the center position of read-write side antenna 301.
On the other hand, shown in Fig. 3 (B), on the surface and the back side, be in the aerial coil in the past 20 of position overlapped relation near first interarea of magnetic core and first main part and second main part of second interarea respectively, the major axis of the ring of the magnetic line of force H by this magnetic core is parallel with planar conductor 2, and the directional beam DB of antenna is towards the direction along the face of planar conductor 2.Therefore, when making antenna 100 abreast near read-write side antenna 301, the longest distance that can communicate by letter shortens, and makes antenna 100 elongated with respect to the longest distance that can communicate by letter under the close obliquely situation of read-write side antenna 301.
Relative therewith, can make the longest distance that can communicate by letter elongated according to first execution mode, and under the state of the center unanimity of the center of antenna 101 and read-write side antenna 301, can obtain the longest distance that can communicate by letter.
Then, be illustrated in the example that communicates between IC-card that RFID uses and the electronic equipments such as mobile telephone terminal that possess above-mentioned antenna 101.
Fig. 4 is the figure of the configuration relation of the expression IC-card used of RFID and the electronic equipments such as mobile telephone terminal that possess above-mentioned antenna 101.Be accommodated in the framework 201 of electronic equipment by the antenna that is constituted at the end of planar conductor 2 configuration aerial coil 21.Fig. 4 (A) makes this electronic equipment and IC-card 401 be longitudinally close state equally, and Fig. 4 (B) makes both be configured to the state of quadrature.Be formed with the aerial coil of multiturn along its periphery in the inside of IC-card 401, and with aerial coil 21 magnetic couplings.
Thus, by aerial coil 21 being configured in the end of planar conductor 2, near the time with the IC-card of planar conductor 2 approximate same size, because the coil-conductor distance each other of the aerial coil 21 of the aerial coil of IC-card 401 and the antenna of present embodiment is close, so can obtain the close coupling between antenna.
Thus, not only can and apart for example communicate between the read write line about 100mm, also can be applicable to situation about under the very close state of IC-card, communicating.
That is, antenna of the present invention becomes the winding method that also can obtain the coil-conductor of good communication performance when aerial coil being configured in the end of planar conductor.With utilized the antenna of the aerial coil of structure in the past that only coil-conductor is wound on around the magnetic core and compared, the magnetic field intensity that communication is made contributions strengthens, and can obtain high communication performance (with the relevant performances such as the error rate of the distance that can communicate by letter or communication data).
Fig. 5 is the longest distance that can communicate by letter of expression with respect to the figure of the relation of the skew between the center of the framework of the electronic equipment of the antenna 101 of taking in first execution mode and the center of reading and writing the side antenna.At this, as initial point, the center of the framework of expression electronic equipment is with respect to the side-play amount at the center of read-write side antenna on transverse axis with the position of the centrally aligned of the framework of the center of read-write side antenna and electronic equipment.
The size of the ring of read-write side antenna is about 65 * 100mm, and the framework size of electronic equipment is about 45 * 90mm, and the size of aerial coil 21 is about 20 * 15mm.
Hence one can see that, and the longest distance that can communicate by letter when the centrally aligned of the framework of the center of read-write side antenna and electronic equipment is the longest.
Fig. 6 is the figure that the position relation of planar conductor 2 and aerial coil 21 is represented.At this, the distance from the end of the aerial coil 21 of the near side of one side S of anomaly face conductor 2 to above-mentioned one side S is made as X, will be the length of the aerial coil 21 of right angle orientation when being made as Y with respect to one side S of planar conductor 2, there is the relation of Y＞X.
Relation about above-mentioned X and Y connects with reference to Fig. 7.
Fig. 7 (A) is the vertical view that the position relation of planar conductor 2 and aerial coil 21 is represented.In this example, planar conductor 2 is 42mm * 90mm, and aerial coil 21 is 20mm * 15mm.Fig. 7 (B) be to the aerial coil 21 of first execution mode and in the past the aerial coil of structure represent the figure that concerns between above-mentioned distance X and the coupling coefficient.At this, in the aerial coil of the structure in the past of comparative example, be in position overlapped relation on the surface and the back side near first interarea of magnetic core and first conductor part and second conductor part of second interarea respectively.In addition, the antenna of read-write is 100 * 100mm, with this antenna at a distance of the distance of 30mm and opposed.
Shown in Fig. 7 (B), the aerial coil that the coupling coefficient ratio of aerial coil 21 was constructed in the past when X＜15mm is big.Because at this Y=15, so the relation of Y＞X is set up, hence one can see that can access the high coupling coefficient of aerial coil of constructing than in the past.
In addition, shown in Fig. 7 (B), above-mentioned size X can be a negative value.That is, shown in Fig. 6 (B), the end of aerial coil 21 can be than one side S of planar conductor 2 more in the outer part.
By taking such relation, the direction of the directional beam DB shown in Fig. 3 (A) is erected, thereby can realize purpose of the present invention.
" second execution mode "
Fig. 8 (A) is the figure of the state before the assembling of aerial coil 22 of second execution mode, and Fig. 8 (B) is the vertical view of this aerial coil 22.Shown in Fig. 8 (A), on flexible substrate 10, be formed with coil-conductor CW.This coil-conductor CW is that Vorticose coil is by the conductive pattern of the state after cutting along the cut-off lines of regulation.Flexible substrate 10 surrounds the four sides of magnetic core 1, and is engaged each other in the end of above-mentioned cut-off lines coil sections conductor CW.In this example, end a-a ', b-b ', c-c ' are by joints such as scolding tin.Thus, constituted the aerial coil 22 shown in Fig. 8 (B).
Shown in Fig. 8 (B) towards in, second conductor part 12 is near the upper surface (second interarea) of magnetic cores 1, first conductor part 11 is near the lower surface (first interarea) of magnetic cores 1.
Fig. 9 (A) is the upward view that possesses the antenna 102 of above-mentioned aerial coil 22, and Fig. 9 (B) is its front view.Aerial coil 22 is installed in along the position as the central portion on one side of the planar conductor 2 of circuit substrate.
Fig. 9 (C) is fixed on the example of taking in as framework 202 inboards of the planar conductor 2 of circuit substrate with aerial coil 22.In this case, second conductor part 12 also is configured in than the position of first conductor part 11 further from the center of planar conductor 2.
Thus, play and same effect and the effect described in first execution mode.
" the 3rd execution mode "
Figure 10 (A) is the preceding vertical view of assembling of the aerial coil 23 of the 3rd execution mode, and Figure 10 (B) is the vertical view of this aerial coil 23.On flexible substrate 10, be formed with spiral helicine coil-conductor CW, possess through hole A at the center of the formation position of spiral helicine coil-conductor.Magnetic core 1 is inserted into the through hole A part of flexible substrate 10, constitutes the aerial coil 23 shown in Figure 10 (B).
Figure 11 (A) is the upward view that possesses the antenna 103 of above-mentioned day wire-core coil 23, and Figure 11 (B) is its front view.Aerial coil 23 is installed in along the position as the central portion on one side of the planar conductor 2 of circuit substrate.
Figure 11 (C) is different with the example of Figure 11 (A), Figure 11 (B), is aerial coil 23 is fixed on the example of taking in as framework 203 inboards of the planar conductor 2 of circuit substrate.In this case, second conductor part 12 also is configured in than the position of first conductor part 11 further from the center of planar conductor 2.
Thus, play and same effect and the effect described in first execution mode.
Shown in Figure 10 (B), be made as W and will be the length of the above-mentioned magnetic core of right angle orientation when being made as Y at the width of narrow part that will connect the coil-conductor between first conductor part 11 and second conductor part 12, be connected with reference to Figure 12 about the relation of W and Y with respect to above-mentioned one side of above-mentioned planar conductor.
Figure 12 is the long-pending 15 * 15=225mm that is fixed as that expression makes W and Y
2And the figure of the relation when W is changed between W and the coupling coefficient.In this example, the antenna of read-write is 10 * 100mm, and with this antenna at a distance of the distance of 30mm and opposed.
When W＜Y when 15mm (W＜), the more little coupling coefficient of W is more little, and communication performance worsens.Therefore, by taking the relation of W 〉=Y, can guarantee the excellent communications performance.
" the 4th execution mode "
Figure 13～Figure 15 is the figure of formation separately of aerial coil 24A, 24B, the 24C of expression the 4th execution mode.Figure 13 (A) is the preceding vertical view of assembling of aerial coil 24A, and Figure 13 (B) is the vertical view of this aerial coil 24A.Figure 14 (A) is the preceding vertical view of assembling of aerial coil 24B, and Figure 14 (B) is the vertical view of this aerial coil 24B.Similarly, Figure 15 (A) is the preceding vertical view of assembling of aerial coil 24C, and Figure 15 (B) is the vertical view of this aerial coil 24C.
Different with aerial coil shown in Figure 10 23 is that the end that the magnetic line of force of magnetic core 1 is come in and gone out forms slightlyer than other parts.In aerial coil 24A shown in Figure 13, magnetic core 1 one end thereof integral body broadens (slightly) and forms.In the aerial coil 24B of Figure 14, an end of magnetic core 1 expands to trapezoidal shape.In the example of the aerial coil 24C of Figure 15, magnetic core 1 is the shape that width broadens to both ends from central portion.
By utilizing the magnetic core 1 of this shape, thus big by the magnetic flux quantitative change of magnetic core 1, can strengthen and the magnetic field of the antenna of communication counterpart is coupled, thereby make the longest distance that can communicate by letter elongated etc., can improve communication performance.
" the 5th execution mode "
Figure 16 (A) is the preceding vertical view of assembling of the aerial coil 25 of the 5th execution mode, and Figure 16 (B) is the vertical view of this aerial coil 25, and Figure 16 (C) is the upward view of aerial coil 25.On flexible substrate 10, be to sandwich magnetic core 1 (surrounding three faces) after broken line bends, but on flexible substrate 10, be that the center is formed with spiral helicine coil-conductor CW with position from above-mentioned broken line skew with the position shown in the dotted line in scheming.And, in coil-conductor CW, be used as second conductor part 12 apart from an above-mentioned broken line side far away, be used as first conductor part 11 apart from the near side of above-mentioned broken line.
Figure 17 (A) is the upward view that possesses the antenna 104 of above-mentioned aerial coil 25, and Figure 17 (B) is its front view.Aerial coil 25 is installed in along the position as the central portion on one side of the planar conductor 2 of circuit substrate.
Figure 17 (C) is different with the example of Figure 17 (A), Figure 17 (B), is aerial coil 25 is fixed on the example of taking in as framework 204 inboards of the planar conductor 2 of circuit substrate.In this case, second conductor part 12 also is configured in than the position of first conductor part 11 further from the center of planar conductor 2.
Thus, play and same effect and the effect described in first execution mode.
" the 6th execution mode "
Figure 18～Figure 20 is the figure of formation separately of aerial coil 26A, 26B, the 26C of expression the 6th execution mode.Figure 18 (A) is the preceding vertical view of assembling of expression aerial coil 26A, and Figure 18 (B) is the vertical view of this aerial coil 26A.Figure 19 (A) is the preceding vertical view of assembling of aerial coil 26B, and Figure 19 (B) is the front view of this aerial coil 26B.Similarly, Figure 20 (A) is the preceding vertical view of assembling of aerial coil 26C, and Figure 20 (B) is the vertical view of this aerial coil 26C.
Different with aerial coil shown in Figure 16 25 is that the end that the magnetic line of force of magnetic core 1 is come in and gone out forms slightlyer than other parts.In aerial coil 26A shown in Figure 180, magnetic core 1 one end thereof integral body broadens (slightly) and forms.In the aerial coil 26B of Figure 19, an end of magnetic core 1 expands to trapezoidal shape.In the example of the aerial coil 26C of Figure 20, magnetic core 1 is the shape that width broadens to both ends from central portion.
By utilizing the magnetic core 1 of this shape, thus big by the magnetic flux quantitative change of magnetic core 1, can strengthen and the magnetic field of the antenna of communication counterpart is coupled, thereby make the longest distance that can communicate by letter elongated etc., can improve communication performance.
Claims (8)
1. antenna, aerial coil is near the planar conductor configuration, and described aerial coil possesses: the tabular magnetic core with first interarea and second interarea; With the coil-conductor that is wound on this magnetic core; This antenna is characterised in that,
First interarea and the described planar conductor of described magnetic core are opposed,
Described planar conductor is that essentially rectangular is tabular,
Described aerial coil is configured to the one side than the more close regulation in center of described planar conductor,
Second conductor part of second interarea of first conductor part of first interarea of close described magnetic core and close described magnetic core in the described coil-conductor, be positioned at nonoverlapping position when the normal direction of first interarea of described magnetic core or second interarea is watched
Second conductor part is configured in than the position of first conductor part further from the center of described planar conductor,
The coil axes of described coil-conductor is vertical with respect to described one side of described planar conductor.
2. antenna according to claim 1 is characterized in that,
Described coil-conductor is made of the conductive pattern that forms on the flexible substrate, this conductive pattern be shaped as Vorticose coil by the shape after cutting along the cut-off lines of regulation, described flexible substrate surrounds the four sides of described magnetic core, is engaged with each other at the described conductive pattern of described cut-off lines part.
3. antenna according to claim 1 is characterized in that,
Described coil-conductor is a helical form, and described flexible substrate surrounds three of described magnetic core.
4. antenna according to claim 1 is characterized in that,
Described coil-conductor is a helical form, and described flexible substrate possesses through hole at the center of the formation position of described coil-conductor, and described magnetic core is inserted in the described through hole.
5. according to each described antenna in the claim 1～4, it is characterized in that,
Be made as W and will be the length of the described magnetic core of right angle orientation when being made as Y at the width of narrow part that will connect the coil-conductor between described first conductor part and described second conductor part, be defined as the relation of W 〉=Y with respect to described one side of described planar conductor.
6. according to each described antenna in the claim 1～4, it is characterized in that,
The end that the magnetic line of force of described magnetic core is come in and gone out is thicker than other parts.
7. according to each described antenna in the claim 1～4, it is characterized in that,
Will be from the end of the described antenna of a side near being made as X and will being the length of the described magnetic core of right angle orientation when being made as Y, be defined as the relation of Y＞X with respect to described one side of described planar conductor to the distance on described one side of described planar conductor apart from described one side of described planar conductor.
8. according to each described antenna in the claim 1～4, it is characterized in that,
Described planar conductor is the circuit substrate that described aerial coil is installed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310052252.4A CN103178346B (en) | 2009-04-03 | 2010-04-02 | Antenna |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2009-091381 | 2009-04-03 | ||
| JP2009091381A JP4883125B2 (en) | 2009-04-03 | 2009-04-03 | antenna |
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|---|---|---|---|
| CN201310052252.4A Division CN103178346B (en) | 2009-04-03 | 2010-04-02 | Antenna |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101859923A true CN101859923A (en) | 2010-10-13 |
| CN101859923B CN101859923B (en) | 2013-03-13 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010101547243A Active CN101859923B (en) | 2009-04-03 | 2010-04-02 | Antenna |
| CN201310052252.4A Active CN103178346B (en) | 2009-04-03 | 2010-04-02 | Antenna |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310052252.4A Active CN103178346B (en) | 2009-04-03 | 2010-04-02 | Antenna |
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| Country | Link |
|---|---|
| JP (1) | JP4883125B2 (en) |
| CN (2) | CN101859923B (en) |
| GB (1) | GB2469209B (en) |
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Also Published As
| Publication number | Publication date |
|---|---|
| GB201005634D0 (en) | 2010-05-19 |
| GB2469209A (en) | 2010-10-06 |
| CN103178346A (en) | 2013-06-26 |
| JP2010245776A (en) | 2010-10-28 |
| JP4883125B2 (en) | 2012-02-22 |
| GB2469209B (en) | 2011-12-14 |
| CN103178346B (en) | 2016-08-10 |
| CN101859923B (en) | 2013-03-13 |
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