CN201868562U - Antenna and device provided therewith - Google Patents
Antenna and device provided therewith Download PDFInfo
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- CN201868562U CN201868562U CN2010205285512U CN201020528551U CN201868562U CN 201868562 U CN201868562 U CN 201868562U CN 2010205285512 U CN2010205285512 U CN 2010205285512U CN 201020528551 U CN201020528551 U CN 201020528551U CN 201868562 U CN201868562 U CN 201868562U
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Abstract
The embodiment of the utility model discloses an antenna and a device provided therewith which are used for improving a Q value of an induction coil antenna and ensuring normal non-contact communication, and relates to the technical field of communication. The antenna provided by the embodiment of the utility model comprises a plurality of turns of lead wire coils. In the plurality of turns of lead wire coils, the cross-sectional area of the outer turn of lead wire coil is greater than or equal to that of the inner turn of lead wire coil in any two adjacent turns of lead wire coils. The scheme provided by the embodiment of the utility model is applicable to the non-contact communication.
Description
Technical field
The utility model relates to communication technical field, relates in particular to a kind of antenna and has the device of this antenna.
Background technology
In contactless communication, often to use the antenna of induction coil form, the magnetic field that certain intensity is provided is to guarantee that contactless communication can reach certain communication distance; The magnetic field intensity in this producible magnetic field of class antenna is big or small directly related with the volume of induction coil and supply current.
In some environment, for example in narrow and small mobile phone inside, it is unpractical increasing magnetic field intensity by increase induction coil volume, therefore, wants to improve the magnetic field intensity that described antenna produces, and can only realize by the operating current that increases induction coil.And to increase the operating current of induction coil, just must reduce the loss in induction coil loop to greatest extent.
Under some situation, in the actual installation environment unavoidably can metal parts (for example: battery of mobile phone and integrated circuit components) appear in the zone near antenna, induction coil can produce eddy current in these metal partss, cause the loss in induction coil loop, and then greatly reduce the magnetic field that induction coil produces, communication distance is fallen sharply.In order to overcome above-mentioned eddy current effect, all can between induction coil and metal parts, fill magnetic material usually; But any magnetic material all can reduce the Q value (Quality factor, quality factor) of coil antenna to some extent, and the reduction amount is approximately tens to tens, even the Q value can occur less than 10 situation.
The Q value of above-mentioned degree changes, and can make the Q value of the induction coil in the described antenna can't satisfy in the contactless communication normally communication distance to the requirement of Q value, and then can't guarantee normal contactless communication.
In addition, except above-mentioned special applied environment, in general applied environment, also needing increases the Q value, guarantees normal communication distance.
The utility model content
Embodiment of the present utility model provides a kind of antenna and has the device of this antenna, in order to improve the Q value of induction coil antenna, guarantees normal contactless communication.
For achieving the above object, embodiment of the present utility model adopts following technical scheme:
A kind of antenna comprises the multiturn lead loop, and wherein, in the adjacent two circle leads, the sectional area of outer circle lead is more than or equal to the sectional area of interior circle lead arbitrarily.
A kind of device is comprising above-mentioned antenna.
The antenna that the utility model embodiment provides and have the device of this antenna by changing the sectional area of the lead loop of different circles in the antenna, makes it be the design feature that ecto-entad reduces gradually; Utilize such antenna structure, in the contactless communication process of reality, the equivalent resistance of whole multiturn lead loop can significantly diminish, and then makes that the Q value phase strain of induction coil antenna is big, can reach about 40, can guarantee normal contactless communication.
Description of drawings
In order to be illustrated more clearly in the utility model embodiment or technical scheme of the prior art, the accompanying drawing of required use is done to introduce simply in will describing embodiment below, apparently, accompanying drawing in describing below only is embodiment more of the present utility model, for those of ordinary skills, under the prerequisite of not paying creative work, can also obtain other accompanying drawing according to these accompanying drawings.
Fig. 1 is that three-dimensional view is amplified in the part of existing coil antenna;
Fig. 2 is the schematic diagram of the antenna structure among the utility model embodiment one;
Fig. 3 is the schematic diagram of the antenna structure among the utility model embodiment two;
Fig. 4 is the schematic diagram one of existing antenna structure;
Fig. 5 is the schematic diagram two of existing antenna structure;
Fig. 6 is that plan view is amplified in the part of coil antenna;
Fig. 7 is with the isometric exploded view of the antenna applications among the utility model embodiment in the mobile-phone payment scene;
Fig. 8 is the schematic diagram of the triangle bore coil antenna among the utility model embodiment;
Fig. 9 is the schematic diagram of the oval port footpath coil antenna among the utility model embodiment;
Reference numeral: 1-metal parts; The 2-magnetic membrane material; The 3-medium substrate; The 4-wire coil; 5-path lead is right; The 6-double-interface SIM card;
The conductor width of the W1-first circle coil; The conductor width of the W2-second circle coil; The conductor width of W3-the 3rd circle coil; The conductor width of W4-the 4th circle coil; The conductor width of W5-the 5th circle coil; The conductor width of W6-the 6th circle coil;
Turn-to-turn between first and second circle coil of S12-every; Turn-to-turn between second and third circle coil of S23-every; Turn-to-turn between third and fourth circle coil of S34-every; Turn-to-turn between the S45-fourth, fifth circle coil every; Turn-to-turn between S56-the 5th, the six circle coils every.
Embodiment
Below in conjunction with the accompanying drawing among the utility model embodiment, the technical scheme among the utility model embodiment is clearly and completely described, obviously, described embodiment only is the utility model part embodiment, rather than whole embodiment.Based on the embodiment in the utility model, those of ordinary skills are not making the every other embodiment that is obtained under the creative work prerequisite, all belong to the scope of the utility model protection.
In order to overcome the eddy current effect that traditional low frequency or high frequency coil antenna are occurred in closing on the environment of metal parts, magnetic material all can be set usually between coil antenna and metal parts to reduce the eddy current effect of metal parts to coil antenna.
Be the stereogram of the part of the coil antenna that is provided with magnetic material after amplifying shown in Fig. 1; Wherein, induction coil 4 is close to the upper surface of medium substrate 3, the lower surface of medium substrate 3 is close to the upper surface of magnetic thin film 2, the lower surface of magnetic thin film 2 is close to the upper surface of metal parts 1 (for example battery of mobile phone), metal parts 1 can be very near from the induction coil 4 of antenna, such as 0.1 millimeter.
Yet, though such structural design can reduce the eddy current effect of metal parts to coil antenna, but also can make the quality factor q value of coil antenna significantly reduce simultaneously, its might be under the free space environment tens be reduced to tens rapidly, even, finally have influence on the normal contactless communication in certain communication distance scope less than 10.
In order to improve the Q value of closing on induction coil antenna in the metal environment, guarantee normal contactless communication, the utility model embodiment provides a kind of antenna and has had the device of this antenna.
Certainly need to prove that antenna that the utility model embodiment provides and the device with this antenna are not only to be applicable in the above-mentioned environment that closes on metal parts, go for the occasion that other uses coil antenna yet.
Below in conjunction with accompanying drawing the utility model embodiment antenna and device with this antenna are described in detail.
The antenna that provides among the utility model embodiment comprises the multiturn lead loop, and, in the described multiturn lead loop:
In the adjacent two circle leads, the sectional area of outer circle lead is more than or equal to the sectional area of interior circle lead arbitrarily.
Further, the sectional area of different parts can be set to identical everywhere in the same circle lead; The sectional area that also can be set to different parts in the same circle lead is incomplete same, and promptly the sectional area of different parts is not to keep a unified value in same circle lead, and it can be a continually varying, also can be gradual change.
Further, the sectional area Changing Pattern from outside to inside for lead can comprise following several situation:
(1) sectional area of every circle lead successively decreases from outside to inside successively, and wherein, successively decreasing successively comprises that equal difference is successively decreased or non-equal difference is successively decreased;
(2) sectional area of described lead is that a unit successively decreases from outside to inside with at least two adjacent circles, promptly in described multiturn lead loop, the reducing of sectional area that occurs a lead every at least one circle, for example, first circle from outside to inside and the sectional area of the second circle lead equate and sectional area big or small be a1, the sectional area of the 3rd circle and the 4th circle lead equate and sectional area big or small be a2, the equal and sectional area of the sectional area of the 5th circle and the 6th circle lead is big or small to be a3, wherein, a1＞a2＞a3.Need to prove, can be equal difference between a1, a2 and the a3, can not be equal difference also;
(3) as long as variation from outside to inside of the sectional area of described lead also can be at random and reduces, it the guarantee sectional area of the sectional area of outer circle lead more than or equal to interior circle lead.Particularly, even the situation that exists the sectional area of adjacent turn lead to equate, its overall variation also is erratic behavior, for example, the sectional area of first circle from outside to inside, second circle and the 3rd circle lead equate and sectional area big or small be a1, the sectional area size of the 4th circle lead is a2, the equal and sectional area of the sectional area of the 5th circle and the 6th circle lead is big or small to be a3, wherein, a1, a2 and a3 successively decrease one by one.
Further, in the described multiturn lead loop, in the interval between the adjacent two circle leads, the interval width between the outer circle lead is more than or equal to the interval width between the interior circle lead arbitrarily.
Further, can comprise for the Changing Pattern from outside to inside of the interval width between the lead: the interval width between the described lead all equates; Or the interval width between the described lead successively decreases from outside to inside successively; Or the interval width between the described lead is that a unit successively decreases from outside to inside with at least two adjacent circles; Or the interval width between the described lead reduces from outside to inside at random.
Similar for the Changing Pattern and the sectional area Changing Pattern from outside to inside of above-mentioned lead from outside to inside of the interval width between the described lead, repeat no more herein.
The antenna structure that adopts the utility model embodiment to provide, in the contactless communication process of reality, the equivalent resistance of whole multiturn lead loop can significantly diminish, and then make that the Q value phase strain of induction coil antenna is big, can reach about 40, improve communication distance effectively, can guarantee normal contactless communication.Particularly,
For inductance coupling high formula RFID (Radio Frequency Identification, radio-frequency (RF) identification) induction coil antenna of system, under the situation of its size constancy, the Q value is big more to mean that the current strength in the aerial coil is big more, power output is strong more, and reading/writing distance is just far away more.The computing formula of quality factor q is:
In the formula (1), f
0Be the operating frequency of coil antenna, L is the equivalent inductance of coil antenna, and R is the equivalent resistance of coil antenna.This equivalence resistance R is also referred to as AC resistance, is the resistance characteristic that coil is presented under the excitation of actual alternating current, and its resistance is relevant with the skin depth and the coupling of the induction between each conducting line segment of coil of D.C. resistance, alternating signal.
For traditional coil antenna, between the sectional area of its every circle lead correspondence and the adjacent turn lead is changeless at interval; With the printed circuit board (PCB) is example, and after the average diameter that reaches coil was determined, the L/R in (1) formula just decided, and adds the operating frequency basic fixed of coil antenna in winding length, lead live width, winding department, so the leeway that the Q value improves is little.
If the coiling of coil is divided into plurality of sections by outer circle to interior circle, and every section sectional area is unequal, particularly, can be equipped with bigger live width/sectional area for long coiling section, be that short coiling section is equipped with less live width/sectional area, that is to say, to interior circle, in the two adjacent arbitrarily circle leads, the live width/sectional area of outer circle is more than or equal to the live width/sectional area of interior circle from the outer circle of helical coil; And/or,
In the interval between the two adjacent arbitrarily circle leads, the interval width between the outer circle lead is more than or equal to the interval width between the interior circle lead;
According to the arbitrary of above-mentioned situation or combination, select the suitable distribution of successively decreasing, two the factor-D.C. resistances, the coupling of the induction between each circle conducting line segment that influence AC resistance R are all changed, cause the resistance R of whole helical coil significantly to diminish, the Q value of coil antenna is obviously improved.
In the scheme that the utility model embodiment provides, the multiturn lead loop can be positioned at same plane, printed circuit board (PCB) for example, and the shape of lead loop coiled can be plane geometric figure arbitrarily;
At least two circles in the multiturn lead loop also can be positioned at different planes, and for example, coil can coiled column or taper.
Come the antenna that provides among the utility model embodiment is described further with concrete example below.In following embodiment, all be example with the printed circuit board (PCB); Because the conductor thickness unanimity of printed circuit board (PCB), therefore its sectional area is directly proportional with the lead live width, the variation of the sectional area of lead directly is presented as the variation of lead live width, therefore can replace the sectional area of lead to come the antenna that the utility model provides is described with the lead live width in following embodiment.
Need to prove that the variation of the sectional area of lead not exclusively equals the variation of lead live width, for example, when the sectional area of lead was rectangle, the variation of lead live width and the variation of conductor thickness all may cause the variation of the sectional area of lead.
Embodiment one:
In the present embodiment, consider mainly in the described multiturn lead loop that the sectional area of lead from outside to inside changes the influence to coil antenna Q value.
As shown in Figure 2, the antenna that provides in the present embodiment comprises multiturn lead loop 4, promptly aforesaid induction coil; In described multiturn lead loop 4, in the adjacent two circle leads, the live width of outer circle lead is more than or equal to the live width of interior circle lead arbitrarily.
The coil antenna that relates in the present embodiment, fixed interval between the adjacent turn lead is constant, be that interval between the adjacent lead of per two circles all equates, and the live width of every circle lead correspondence changes, diminish gradually to interior circle from the outer circle of described multiturn lead loop, to guarantee to maximally utilise the Q value that coil antenna is improved in obtainable zone.
The value of each circle lead live width that satisfying from outside to inside successively decreases distributes, can adopt the lead loop of conventional method design etc. on the basis of live width value perturbation obtain.The line width variation rule of each circle lead can evenly be successively decreased for equal difference from outside to inside, 0.8,0.75,0.7,0.65,0.6,0.55 millimeter of value successively for example, perhaps with at least two adjacent circle leads be a unit from outside to inside equal difference evenly successively decrease 0.8,0.8,0.7,0.7,0.6,0.6 millimeter of value successively for example; Certainly, the line width variation rule of each circle lead also can reduce for inhomogeneous, particularly, as long as the live width of described each circle lead is the trend that diminishes gradually from outside to inside, the equal situation of live width of adjacent two circles wherein also can occur; 0.8,0.7,0.6,0.55,0.5,0.45 millimeter of value successively for example, perhaps 0.8,0.7,0.7,0.6,0.6,0.55 millimeter of value successively.
The antenna structure that adopts present embodiment to provide, in the contactless communication process of reality, the equivalent resistance of whole multiturn lead loop can significantly diminish, and then makes that the Q value phase strain of induction coil antenna is big, improve communication distance effectively, can guarantee normal contactless communication.
In the foregoing description one, be that sectional area with every circle lead diminishes from outside to inside gradually and situation that the interval width of per two circle adjacent wires is consistent from outside to inside is an example, the scheme that provides among the utility model embodiment is described.In addition, the sectional area of described every circle lead is consistent from outside to inside, and just make the interval between the adjacent lead of per two circles be the variation tendency of the interval width of outer circle lead more than or equal to adjacent interior circle conductor spacing width, for example, interval between the adjacent lead of per two circles is 0.225,0.215,0.205,0.195,0.185 millimeter of value successively, perhaps 0.225,0.22,0.21,0.2,0.19 millimeter of value successively.
Because it is similar that this kind only changes the implementation of the sectional area that only changes lead among implementation and the embodiment one of interval width of per two circle adjacent wires, so just repeat no more.Adopt this kind implementation can reach above-mentioned raising aerial coil Q value equally, improve the effect of communication distance and communication quality.
Embodiment two:
In the present embodiment, will consider simultaneously that in the described multiturn lead loop, the variation of the interval width of the variation of the sectional area of lead from outside to inside and per two circle adjacent wires is to the influence of coil antenna Q value.
On the basis of embodiment one, above-mentioned antenna is done further improvement obtain antenna shown in Figure 3.
As shown in Figure 3, in the present embodiment, not only the live width of every circle lead is the Changing Pattern of outer circle live width more than or equal to adjacent interior circle live width in the lead loop of antenna, and also has the Changing Pattern of the interval width of outer circle lead more than or equal to interior circle conductor spacing width between the adjacent lead.
Wherein, the turn-to-turn that satisfies the regularity of distribution of successively decreasing can obtain on a fixed value basis every value in perturbation from outside to inside.If the PCB coil, this fixed value is made as and is a bit larger tham minimum turn-to-turn that the PCB industry can realize every (0.125 millimeter) usually.In the present embodiment, described fixed value can be chosen for 0.2 millimeter.The interval variation rule of each adjacent turn lead can evenly be successively decreased for equal difference from outside to inside, interval between the adjacent lead of for example per two circles is 0.225,0.215,0.205,0.195,0.185 millimeter of value successively, perhaps with the turn-to-turn of described adjacent wires every at least two adjacent spacing distances be a unit from outside to inside equal difference evenly successively decrease 0.225,0.225,0.205,0.205,0.185 millimeter of value successively for example; The interval variation rule of described adjacent turn lead also can reduce for inhomogeneous, particularly, as long as the interval width between the adjacent lead is the trend that diminishes gradually from outside to inside, the situation that wherein also can exist two adjacent conductor spacings to equate; Interval between the adjacent lead of for example per two circles is 0.225,0.22,0.21,0.2,0.19 millimeter of value successively, perhaps 0.225,0.21,0.21,0.195,0.185 millimeter of value successively.
The antenna structure that adopts present embodiment to provide, in the contactless communication process of reality, the equivalent resistance of whole multiturn lead loop can significantly diminish, and then makes that the Q value phase strain of induction coil antenna is big, improve communication distance effectively, can guarantee normal contactless communication; And the antenna in the present embodiment has further changed the interval between the lead of adjacent turn, can obtain higher Q value than the antenna among the embodiment one.
For the antenna that provides among the utility model embodiment advantage with respect to prior art is provided better, now describe by one group of measured data.
The 6 circle rectangular opening footpath coil antenna that Fig. 4 designs for adopting prior art, the live width W1 that adopts outermost turn coil among Fig. 6 is as every circle live width, and adjacent turn is got 0.2 millimeter at interval, 48.5 millimeters * 32.5 millimeters of coil bores;
The 6 circle rectangular opening footpath coil antenna that Fig. 5 designs for adopting prior art, the live width W6 that adopts interior circle coil among Fig. 6 is as every circle live width, and adjacent turn is got 0.2 millimeter at interval, 48.5 millimeters * 32.5 millimeters of coil bores;
The 6 circle rectangular opening footpath coil antenna that Fig. 2 designs for the scheme that adopts the utility model embodiment one, as shown in Figure 6, each circle live width from outside to inside is followed successively by W1～W6, and (W1＞W2＞W3＞W4＞W5＞W6), adjacent turn is all got 0.2 millimeter, 48.5 millimeters * 32.5 millimeters of coil bores at interval.The value of each circle live width that satisfying from outside to inside successively decreases distributes can adopt that perturbation obtains on the basis of the live width values such as coil of traditional design.Each circle line width variation rule can evenly be successively decreased for equal difference, for example W1～W6 0.8,0.75,0.7,0.65,0.6,0.55 millimeter of value successively; Changing Pattern also can successively decrease for inhomogeneous, for example W1～W6 0.8,0.7,0.6,0.55,0.5,0.45 millimeter of value successively;
The 6 circle rectangular opening footpath coil antenna that Fig. 3 designs for the scheme that adopts the utility model embodiment two, as shown in Figure 6, each circle live width from outside to inside is followed successively by W1～W6 (W1＞W2＞W3＞W4＞W5＞W6), from outside to inside adjacent turn is got S12, S23, S34, S45, S56 (S12＞S23＞S34＞S45＞S56), 48.5 millimeters * 32.5 millimeters of coil bores at interval successively.The obtaining value method of each circle live width is the same; The turn-to-turn that satisfying from outside to inside successively decreases distributes can obtain on the basis of a fixed value every value in perturbation, and it is 0.2 millimeter that present embodiment is selected this fixed value.Each adjacent turn interval variation rule can evenly be successively decreased for equal difference, for example S12～S56 0.225,0.215,0.205,0.195,0.185 millimeter of value successively; Changing Pattern also can successively decrease for inhomogeneous, for example S12～S56 0.225,0.22,0.21,0.2,0.19 millimeter of value successively.
Table 1 has been listed the measured parameter value of coil antenna shown in Fig. 2～5.
Table 1
As can be seen from Table 1, the coil antenna Q value of the utility model design is apparently higher than the Q value of coil antenna of the prior art; And lead live width and turn-to-turn every coil antenna that changes simultaneously (shown in Figure 3) and lead live width only change and turn-to-turn every constant coil antenna (shown in Figure 2) comparatively speaking, the former Q value is higher.Adopt the scheme among the utility model embodiment, can significantly improve low frequency or the high frequency coil antenna Q value in the metal environment, reduce the ohmic loss in the antenna loop, thereby can make coil antenna under the situation of little electric current power supply, produce magnetic field intensity and the magnetic flux that meets design requirement, effectively improve communication distance and quality.
Being applied to the mobile-phone payment project with coil antenna is example, as shown in Figure 7, double-interface SIM card 6 is connected with a pair of path lead 5 by two contact points respectively, this path lead is connected with the induction antenna of being made up of flexible dielectric substrate 3 and printing wire coil 4 thereon to 5 (having the shelters such as battery that enough length can be crossed the mobile phone back side) again, closely fill the magnetic material 2 that satisfies certain characteristic between induction antenna and battery of mobile phone 1, this magnetic material 2 can be a soft magnetic film.The high Q value coil that the induction antenna system of this structure adopts the utility model embodiment to be provided, can hinder the metal parts (battery of mobile phone) of mobile phone inside and magnetic material weakening effect effectively to coil magnetic field, can under the situation of Weak current (the being no more than 50 milliamperes) power supply that battery of mobile phone provided, reach the desired communication distance of user.
But, what need specialize is that in having the environment of metal parts, near the metal parts the lead loop is the most serious to the negative function of coil magnetic field.In this extreme installation environment, the antenna that employing the utility model embodiment provides also embodies the most obviously than the advantage of conventional coil antenna.But this and the scheme among the utility model embodiment that do not mean that only are applicable to the above-mentioned situation that has metal parts; In other printed coil antenna applications occasion in addition, the antenna among the utility model embodiment has advantage than conventional coil antenna too.
In above embodiment describes, all be that the lead loop with the rectangle bore is that example comes the antenna that the utility model embodiment provides is described; But, the winding mode of the antenna among the utility model embodiment more than that.The shape of the bore of the aerial coil that relates among the utility model embodiment can be the arbitrary plane geometric figure; Particularly, except can be adopts the above-mentioned rectangle bore, can also be the bore that adopts square, triangle (Fig. 8), circle, oval (Fig. 9) or other random geometry.
The number of turn of coil antenna and caliber size can satisfy actual design and require to decide by the magnetic flux that calculates the coil generation.
And the coil antenna among the utility model embodiment can be made by several different methods, for example: etching metal line, coil or printed circuit cable etc. on flexibility or inflexibility printed circuit board (PCB).
In addition, on the antenna that the utility model embodiment provides, at least one coil tap can also be set on the multiturn lead loop that it comprises to form multichannel coil antenna.The coil antenna that a tap forms the differential pair signal excitation for example is set in the coil somewhere.
The utility model embodiment also provides a kind of device, has the antenna of describing in the foregoing description in this device.
Described device can be smart card, for example contact type intelligent card, double-interface smart card etc.; Described device can also be a read-write equipment for smart card, for example Non-contact Media Reader, POS (Point Of Sale, point-of-sale terminal) machine, the subway gate etc. of swiping the card.
In conjunction with the front as can be known to the description of antenna, this device is after adopting above-mentioned antenna structure, can be in the contactless communication process of reality, make the equivalent resistance of whole multiturn lead loop significantly diminish, and then make that the Q value phase strain of induction coil antenna is big, can reach about 40, improve communication distance effectively, can guarantee normal contactless communication.
The above; it only is embodiment of the present utility model; but protection range of the present utility model is not limited thereto; anyly be familiar with those skilled in the art in the technical scope that the utility model discloses; the variation that can expect easily or replacement all should be encompassed within the protection range of the present utility model.Therefore, protection range of the present utility model should be as the criterion with the protection range of claim.
Claims (11)
1. an antenna comprises the multiturn lead loop, it is characterized in that, in the adjacent two circle leads, the sectional area of outer circle lead is more than or equal to the sectional area of interior circle lead arbitrarily.
2. antenna according to claim 1 is characterized in that, the sectional area of different parts is identical in the same circle lead.
3. antenna according to claim 1 is characterized in that, the sectional area of different parts is incomplete same in the same circle lead.
4. antenna according to claim 1 is characterized in that the sectional area of lead successively decreases from outside to inside successively; Or the sectional area of described lead is that a unit successively decreases from outside to inside with at least two adjacent circles; Or the sectional area of described lead reduces from outside to inside.
5. according to the arbitrary described antenna of claim 1-4, it is characterized in that in the interval between the adjacent two circle leads, the interval width between the outer circle lead is more than or equal to the interval width between the interior circle lead arbitrarily.
6. antenna according to claim 5 is characterized in that, the interval width between the described lead all equates; Or the interval width between the described lead successively decreases from outside to inside successively; Or the interval width between the described lead is that a unit successively decreases from outside to inside with at least two adjacent circles; Or the interval width between the described lead reduces from outside to inside.
7. according to the arbitrary described antenna of claim 1-4, it is characterized in that described multiturn lead loop is positioned at same plane, the shape of the bore of described multiturn lead loop is plane geometric figure arbitrarily.
8. according to the arbitrary described antenna of claim 1-4, it is characterized in that at least two circles in the described multiturn lead loop are positioned at different planes.
9. according to the arbitrary described antenna of claim 1-4, it is characterized in that, on described multiturn lead loop, be provided with at least one coil tap to form multichannel coil antenna.
10. a device is characterized in that, comprises each described antenna in the claim 1 to 9.
11. device according to claim 10 is characterized in that, described device is smart card or read-write equipment for smart card.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010205285512U CN201868562U (en) | 2010-09-14 | 2010-09-14 | Antenna and device provided therewith |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010205285512U CN201868562U (en) | 2010-09-14 | 2010-09-14 | Antenna and device provided therewith |
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| CN201868562U true CN201868562U (en) | 2011-06-15 |
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| CN2010205285512U Expired - Lifetime CN201868562U (en) | 2010-09-14 | 2010-09-14 | Antenna and device provided therewith |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102013557A (en) * | 2010-09-14 | 2011-04-13 | 北京握奇数据***有限公司 | Antenna and device with same |
| WO2012034520A1 (en) * | 2010-09-14 | 2012-03-22 | 北京握奇数据***有限公司 | Antenna and apparatus with said antenna |
-
2010
- 2010-09-14 CN CN2010205285512U patent/CN201868562U/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102013557A (en) * | 2010-09-14 | 2011-04-13 | 北京握奇数据***有限公司 | Antenna and device with same |
| WO2012034520A1 (en) * | 2010-09-14 | 2012-03-22 | 北京握奇数据***有限公司 | Antenna and apparatus with said antenna |
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