CN203277640U - Antenna, antenna device and communication device - Google Patents
Antenna, antenna device and communication device Download PDFInfo
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- CN203277640U CN203277640U CN 201320148990 CN201320148990U CN203277640U CN 203277640 U CN203277640 U CN 203277640U CN 201320148990 CN201320148990 CN 201320148990 CN 201320148990 U CN201320148990 U CN 201320148990U CN 203277640 U CN203277640 U CN 203277640U
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Abstract
The utility model provides an antenna, an antenna device and a communication device. The antenna of the utility model comprises: a magnet magnetic core; a coil winding portion formed by a wire winding around the magnet magnetic core; and an adjusting portion connected with one end of the coil winding portion. The adjusting portion comprises a plurality of adjusting wires, and the plurality of adjusting wires are formed by a wire, which is connected with one end of the coil winding portion, being segmented into a plurality of wires along a direction which is crossed with a winding shaft direction of the coil winding portion. The plurality of adjusting wires are mutually connected at two ends. The antenna of the utility model, even if the magnetic core formed by the ferrite and the like is winded by the antenna with the coil, can adjust the inductance through an easy method which maintaining in a small size.
Description
Technical field
The utility model relates to antenna, antenna assembly and the communicator that the wireless communication medium with IC (Integrated Circuit, integrated circuit) card or IC tag and so on communicates.
Background technology
In the past, at RF-ID (Radio Frequency Identification, radio-frequency (RF) identification) or NFC (Near Field Communication, short-range communication) etc. in non-contact IC card or IC tag, existing following technology: in the situation that adjust antenna performance, be formed on inboard on substrate, plane ring-type aerial coil with being the whirlpool shape, forming the capacitor pattern and adjust with resistance pattern No. the 4286977th, Japan Patent (for example with reference to).And, by this capacitor pattern and adjustment are repaired (trimming), etching with resistance pattern, adjust resonance frequency and the Q value of antenna.Yet the technology that Japan Patent is put down in writing for No. 4286977 is difficult to make the size decreases of circular pattern antenna.Therefore, in order to realize miniaturization, propose to have the small size antenna of following shape, that is, be wound with the shape (for example with reference to No. the 4883208th, Japan's special permission) of aerial coil around the magnetic core that is formed by ferrite etc.
Yet it is inductance that the technology that (No. the 4883208th, Japan's special permission) put down in writing is difficult to adjust a factor that determines resonance frequency.In addition, might be because guaranteeing to damage miniaturization be used to the space that the inductance adjusting mechanism is set.That is, be wound with around the magnetic core in the antenna of type of coil, be used for arranging the space with the same inductance adjusting mechanism of loop aerial.The deviation that consequently is difficult to the inductance by the suppressing antenna monomer suppresses the deviation of the communication resonance frequency of this antenna.
The utility model content
Therefore, be wound with coil even the purpose of this utility model is to provide around magnetic core, also keeping under the state of miniaturization, can adjust antenna, antenna assembly and the communicator of inductance by simple method.
In order to address the above problem, a form of the present utility model is that antenna adopts following structure, and it comprises: the magnet magnetic core; Coil winding section, it forms around being wrapped in described magnet magnetic core by wire; And adjustment part, it is connected in an end of described coil winding section, described adjustment part comprises that many are adjusted wire, described many to adjust wires are the wires that will be connected with an end of described coil winding section is divided into many forms on the direction that the winding direction of principal axis with described coil winding section intersects, and described many adjustment wires interconnect at two ends.
According to the utility model, even be wound with the antenna of coil around magnetic core, also keeping under small-sized state, can adjust inductance by simple method.
Description of drawings
Fig. 1 is the exploded perspective view of mobile terminal that is equipped with the antenna of the utility model execution mode 1.
Fig. 2 is the stereogram of the antenna of the utility model execution mode 1.
Fig. 3 is the exploded perspective view of the antenna of the utility model execution mode 1.
Fig. 4 (a) and Fig. 4 (b) mean the utility model execution mode 1 antenna conductor arrangement section and adjust the figure of pattern.
Fig. 5 means the antenna assembly that is formed by circuit substrate and antenna that is equipped on mobile terminal shown in Figure 1 and the schematic diagram of the magnetic line of force that produced by this antenna assembly.
Fig. 6 is equipped with the exploded perspective view of the mobile terminal of antenna of the present utility model in the position different from Fig. 1.
Fig. 7 (a), Fig. 7 (b), Fig. 7 (c) and Fig. 7 (d) mean the figure that the inductance of the antenna of the utility model execution mode 1 is adjusted.
Fig. 8 (a) and Fig. 8 (b) mean the figure of adjustment result of inductance value of the antenna of the utility model execution mode 1.
Fig. 9 (a) and Fig. 9 (b) mean the figure of adjustment result of inductance value deviation of the antenna of the utility model execution mode 1.
Figure 10 means the figure of example of manufacturing process of the antenna of the utility model execution mode 1.
Figure 11 (a) and Figure 11 (b) mean the figure of the flexible substrate of the utility model execution mode 2.
Figure 12 (a) and Figure 12 (b) are the stereograms that schematically shows the antenna of the utility model execution mode 2.
Figure 13 (a) and Figure 13 (b) mean the figure of the comparative example of making comparisons with the antenna of the utility model embodiment shown in Figure 12, mean the figure of the finishing example of the adjustment pattern that is arranged at antenna shown in Figure 12.
Figure 14 is corresponding to the antenna that schematically shows in Figure 13, the figure of the example of the trim locations of the adjustment pattern on the downside flexible substrate of the antenna shown in expression Figure 11 (a).
Figure 15 (a) and Figure 15 (b) mean the figure of finishing example of the adjustment pattern of the antenna that is arranged at Figure 12.
Figure 16 (a) and Figure 16 (b) mean the figure of finishing example of the adjustment pattern of the antenna that is arranged at Figure 12.
Figure 17 (a) and Figure 17 (b) mean the stereogram of the antenna that is provided with the utility model execution mode 2 of adjusting pattern in the both sides of magnetic core.
Figure 18 disposes the stereogram of the antenna of external connection terminals on the position different from antenna shown in Figure 12.
Embodiment
(execution mode 1)
Fig. 1 is the exploded perspective view of mobile terminal that is equipped with the antenna of the utility model execution mode 1.Mobile terminal 1 is covered 3, is accommodated in display floater 2 and carried on the back battery 4, camera 5 and the circuit substrate 6 etc. that cover between 3 by display floater 2, the back of the body and consists of.Be made as following situation in Fig. 1: display floater 2 adopts the touch screen mode, and mobile terminal 1 does not possess the button for operation.Yet, being not limited to the diagram of Fig. 1, display floater 2 both can adopt the touch screen mode, also can not adopt the touch screen mode.In addition, mobile terminal 1 also can possess the button for operation in addition.Display floater 2 is for liquid crystal panel and possess panel cover 2a.As the antenna 8 of an execution mode of the present utility model by the attaching effect of adhesive tape or be fixed in the back of the body by screw etc. and cover 3.In addition, in the present embodiment, antenna 8 approaches the back of the body and cover 3 top circumference and configure (away from battery 4 and near the circumference of camera 5), and is configured in camera 5 and carries on the back and cover between 3 top circumference.Antenna 8 also can configure with the mode that battery 4 overlaps, if but configure in the mode that overlaps with thinner circuit substrate 6, can realize the slimming of whole mobile terminal 1.In addition, in the present embodiment, antenna 8 is configured in the back of the body covers 3 flat, but also can cover along the back of the body 3 curved surface configuration.
Be provided with external connection terminals 8a and 8b on the face relative with circuit substrate 6 of antenna 8, this external connection terminals 8a and 8b are used for by being connected to form antenna assembly with circuit substrate 6.The pin contact is arranged for circuit substrate 6 and the connected mode of antenna 8 or joint is connected, wire bonds etc.In the present embodiment, possess antenna input and output pin 7a, 7b on circuit substrate 6.As everyone knows, the antenna input and output are connected in the antenna control part 9 on the circuit substrate 6 that disposes match circuit and control IC etc. with pin 7a and 7b.And, by these antenna input and output are connected with the coil portion take external connection terminals 8a and 8b as both ends that is arranged at antenna 8 with pin 7a, 7b, form thus antenna assembly.In addition, the back of the body cover 3 and display floater 2 between in formed space, with IC or match circuit, also configure the parts such as Multi-frequency antenna, loud speaker, RF module except RF-ID.
Fig. 2 is the stereogram of the antenna of the utility model execution mode 1.In addition, Fig. 3 is the exploded perspective view of the antenna in the utility model execution mode 1.And, Fig. 4 mean the utility model execution mode 1 antenna conductor arrangement section and adjust the figure of pattern.
As shown in Figure 2, the antenna 8 of present embodiment comprises magnetic core 11 and flexible substrate 12, and this flexible substrate 12 is configured to surround magnetic core 11 mode on every side, and is formed with coil pattern (wire) etc. on the supporter that mainly is made of resin.Magnetic core 11 is formed by ferrite, non-crystaline amorphous metal, silicon steel, permalloy or soft magnetic material equimagnetic body.Flexible substrate 12 is configured to surround magnetic core 11 mode on every side, and forms coil pattern (wire) etc. on the supporter that mainly is made of resin.In the present embodiment, magnetic core 11 for example is made of ferrite, and it is of a size of 13.7mm * 33.5mm * 0.3mm, and might become about 13.4mm～14mm * 33.2mm～33.8mm * 0.27mm～0.33mm because of the calcining dimensional discrepancy.The shape of magnetic core 11 is particularly cuboid tabular of parallelepiped.So-called coil pattern herein refers to produce the coil pattern of the magnetic line of force, and this magnetic line of force is used for communicating with wireless communication mediums such as not shown IC-card or IC tag.In Fig. 2 and Fig. 3, although the concrete shape of not shown coil pattern, the straight line S that is formed with to have arrow is the coil pattern of coil axes.Coil pattern and adjustment pattern described later are formed by Copper Foil usually, this Copper Foil for example between, polyimide film that have at flexible substrate 12 and protective layer or these two resin beds of resist layer form.So-called coil axes S refers to show greatly the axle that is wound with coil pattern centered by this coil axes S, and its coil pattern with flexible substrate 12 is substantially vertical.Below, use Fig. 4 to explain to comprise the conductive pattern on flexible substrate 12 of being formed on of this coil pattern.In addition, wire is not limited in and forms conductive pattern, metal wire etc. can be wound in magnetic core 11, also can form electrically conductive film on magnetic core 11, can adopt any form.
In addition, as shown in Figure 2, magnetic core 11 is on directions X, Y-direction plane earth and enlarges, and on the thickness direction vertical with directions X, Y-direction (direction identical with coil axes S) thinner shape.Coil pattern is wound around along directions X.Magnetic core 11 is preferred the longest on the directions X parallel with coil pattern, and the thickness of thickness direction is less than directions X width and Y-direction width.
In fact as shown in Figure 3, the shape of flexible substrate 12 for being divided into two across magnetic core 11.In the present embodiment, for the purpose of facilitating, the side with external connection terminals 8a, 8b in the above-mentioned flexible substrate that is divided into two 12 is made as downside flexible substrate 12a, opposite side is made as upside flexible substrate 12b.Although narrate in more detail below, downside flexible substrate 12a is engaged by scolding tin with upside flexible substrate 12b.In the present embodiment, with two limits of the flexible substrate 12 of coil axes S almost parallel on engage.In addition, " downside " " upside " is that additional statement when being equipped on equipment as antenna 8, also can be turned upside down for the ease of understanding Fig. 3.
In addition, in the present embodiment, set width that upside flexible substrate 12b has so that magnetic core 11 does not expose on coil axes S direction.Its reason is, and is special in the situation that consist of magnetic core 11 by frangible ferrite, avoids the fragment of magnetic core 11 or residue to disperse in the communicator that antenna 8 has been installed (for example mobile terminal in Fig. 1 1) and communicator is caused harmful effect.
Use in the present embodiment the double faced adhesive tape as adhesive layer, magnetic core 11 is fixed between downside flexible substrate 12a and upside flexible substrate 12b.That is, double faced adhesive tape is attached between magnetic core 11 and downside flexible substrate 12a, reaches between magnetic core 11 and upside flexible substrate 12b.
In addition, at least one face in the face relative with downside flexible substrate 12a or upside flexible substrate 12b of the magnetic core 11 of present embodiment, although not shown, be reserved with spacing and for example be the slit of 2mm～5mm.Because this slit makes magnetic core 11 be divided into small pieces, so this magnetic core 11 has flexibility.Downside flexible substrate 12a and upside flexible substrate 12b had flexible originally.
Therefore, even the sticking portion of the back of the body of mobile terminal shown in Figure 11 lid 3 has curved surface, antenna 8 also can be attached configuration along this curved surface.Its result, at least a portion of magnetic core 11 might be cut apart by above-mentioned slit, makes the state of magnetic core 11 for being made of a plurality of small pieces.If magnetic core 11 is monomer, this moment, magnetic core 11 meetings disperseed.Double faced adhesive tape prevents the dispersion of magnetic core 11.Perhaps also can possess in addition support film.Therefore, by above structure, in Fig. 2 and Fig. 3, can prevent that small pieces or the residue of the magnetic core 11 cut apart by above-mentioned slit from coming off and dispersing in the communicator that antenna 8 has been installed (for example mobile terminal in Fig. 1 1).Its result can be avoided communicator is caused harmful effect.
Reuse Fig. 3 present embodiment is described.Hereinbefore, with two limits of the flexible substrate 12 of coil axes S almost parallel on, consist of the downside flexible substrate 12a of flexible substrate 12 and the wire of upside flexible substrate 12b and be engaged by welding each other.In Fig. 3, be provided with pattern exposed division 17a and 17b on downside flexible substrate 12a, this pattern exposed division 17a and 17b possess the adjustment pattern 13 that represents in Fig. 4 of back, and are used for realizing bonding by what weld.Identical therewith, also be provided with pattern exposed division 19a and 19b on upside flexible substrate 12b, this pattern exposed division 19a and 19b are used for making the coil pattern that the Fig. 4 in the back is represented to be divided into a plurality of pattern two ends separately cut apart that form and expose, so that by weld bonds downside flexible substrate 12a and upside flexible substrate 12b.
In addition, and then in the present embodiment, under the state before assembling flexible substrate 12, to the Copper Foil of cutting apart pattern two ends separately that pattern exposed division 19a and 19b expose that passes through of upside flexible substrate 12b, implemented the scolding tin plating and processed in advance.In addition, to being arranged at the Copper Foil of cutting apart pattern two ends separately that passes through that pattern exposed division 17a, 17b expose of downside flexible substrate 12a and the Copper Foil of external connection terminals 8a, 8b, implemented gold-plated processing in advance.In order to ensure antenna input and output set on externally splicing ear 8a, 8b and circuit substrate 6 with pin 7a, when 7b contacts reliability and prevent corrosion, must carry out this gold-plated processing.Like this, even under the state of having implemented the processing of gold-plated processing or scolding tin plating, in the present embodiment, the Copper Foil of this part still shows as " exposing ".The result of as above processing can form a coil pattern.More specifically, formed coil pattern and other conductive patterns on flexible substrate 12 have been formed in mode shown in Figure 4.
Fig. 4 (a) is the stereogram of the antenna of the utility model execution mode, and Fig. 4 (b) is the stereogram of downside flexible substrate of the antenna of the utility model execution mode.And downside flexible substrate 12a is wound around pattern 14a except comprising, also comprises external connection terminals 8a and 8b, adjustment pattern 13.
That is, on downside flexible substrate 12a, to be parallel to each other and to be formed with as a plurality of winding pattern 14a for the part of the coil pattern that communicates with wireless communication mediums such as IC-card or IC tag with mode that coil axes S intersects.And, on upside flexible substrate 12b, be parallel to each other and with the mode that coil axes S intersects, be formed with a plurality of winding pattern 14b as the part of coil pattern.Above-mentioned a plurality of winding pattern 14a and 14b two ends separately by pattern exposed division 17a and 17b and pattern exposed division 19a and 19b, are in the state that Copper Foil " is exposed " respectively.In Fig. 4 (a), Fig. 4 (b), be wound around pattern 14a, 14b and be formed in regional B.And the part of coil pattern is namely adjusted in the regional A that pattern 13 is formed on downside flexible substrate 12a.It is upper and be not formed on upside flexible substrate 12b that this adjustment pattern 13 only is formed on downside flexible substrate 12a in the present embodiment.At this moment, downside flexible substrate 12a is configured in the side away from circuit substrate 6 (metallic object) in mobile terminal 1, and upside flexible substrate 12b is configured in the side towards circuit substrate 6 (metallic object) in mobile terminal 1.Yet above-mentioned adjustment pattern 13 can only be formed on upside flexible substrate 12b, also can be formed on upside flexible substrate 12b and downside flexible substrate 12a on both.Adjustment pattern 13 is a wire in the wire of the winding pattern 14a of downside flexible substrate 12a to be divided into 3 abreast form.Therefore, 3 patterns that are split to form are connected adjusting pattern end 13a and external connection terminals 8a place.
Fig. 5 means the antenna assembly that is formed by circuit substrate 6 and antenna 8 that is equipped on mobile terminal shown in Figure 11 and the schematic diagram of the magnetic line of force that produced by this antenna assembly.The allocation position of antenna assembly shown in Figure 5 is an example, is not limited thereto.
As shown in Figure 5, the antenna assembly in present embodiment comprises: have the antenna 8 of coil portion and near the circuit substrate 6 of antenna 8 ground configurations.As everyone knows, on the surface of circuit substrate 6 or inner, be provided with surface or the interconnective Wiring pattern of terminal of inner each circuit block of installing.Along with the integrated caused miniaturization by current circuit, circuit substrate 6 nearly all comprises a plurality of wiring layers.Therefore, the power line or GND (ground connection) line that are supplied to each circuit block are set to the wiring layer different from above-mentioned Wiring pattern mostly.Certainly, these Wiring patterns, power line and GND line are the conductors such as copper.That is, circuit substrate 6 can be considered as metallic object.As mentioned above, in the situation that power line or GND line are set to other wiring layer, these power lines or GND line almost are formed on whole of the wiring layer that is assigned with, therefore become the metallic object of special high-quality.In addition, metallic object is so long as realize that the metallic object of the application's purpose gets final product, such as the metallic object that cover at least a portion of 3 as the back of the body or to the back of the body cover 3 metal films that apply, when display floater 2 is liquid crystal panel a part metallic object, barricade, battery 4 metal level, camera 5 metal parts and be installed on the metallic parts of bag etc. of circuit substrate 6.
Like this, in comprising the antenna assembly of antenna 8 and the circuit substrate 6 that almost can be regarded as metallic object, the peristome of the coil portion of antenna 8 is vertical with the face of circuit substrate 6, and antenna 8 is configured in the end of circuit substrate 6.In addition, the end of so-called circuit substrate 6, comprise the end of antenna 8 situation more outstanding than the outermost end of circuit substrate 6, and the end of antenna 8 be positioned at the situation both of these case of locating more in the inner part than the outermost end of circuit substrate 6.
So that the peristome of the coil portion of antenna 8 is substantially vertical with circuit substrate 6, and make the mode of the end almost parallel of the long side direction of coil portion of antenna 8 and circuit substrate 6 configure antenna 8.The coil axes of antenna 8 and circuit substrate 6 almost parallels.Therefore, for example not only in the situation that non-contact IC card is positioned at regional P, and in the situation that be positioned at regional Q, can both carry out good communication.In addition, so-called almost parallel, substantially vertical refers to need not strictly parallel, vertical, as long as for about positive and negative 15 degree, can obtain well fully without problems effect of the present utility model, as long as and be at least about positive and negative 30 degree, can obtain effect of the present utility model.
Namely, because the peristome of antenna 8 is vertical with circuit substrate 6, thus if signal inputs to antenna 8 the electric current antenna 8 of flowing through, in regional Q sometime, the direction of the magnetic line of force M that is produced by antenna 8 is the direction away from antenna 8, and magnetic line of force M only passes through to a direction.Consequently electric current is flowed through and is positioned at for example non-contact IC card of regional Q, and the mobile terminal and the non-contact IC card that are equipped with the antenna assembly of the present embodiment that is made of circuit substrate 6 and antenna 8 can communicate.
In addition, for regional P, the electric current antenna 8 of flowing through if signal inputs to antenna 8, in regional P sometime, the direction of magnetic line of force M is away from the direction of antenna 8 or any direction in the direction of antenna 8.Its reason is: the magnetic line of force M that is produced by antenna 8 can decay near circuit substrate 6, and thus, it is not vertical with circuit substrate 6 that the axle X of magnetic line of force M becomes, but tilts with respect to circuit substrate 6.Consequently electric current is flowed through and is positioned at for example non-contact IC card of regional P, and the mobile terminal and the non-contact IC card that are equipped with the antenna assembly of the present embodiment that is made of circuit substrate 6 and antenna 8 can communicate.
The end of antenna 8 can with the ground configuration of the end part aligning of circuit substrate 6, the end of antenna 8 also can be more outstanding than the end of circuit substrate 6.In addition, the end of antenna 8 also can be positioned at than the end of circuit substrate 6 and locate more in the inner part.
In addition, as shown in Figure 2, if the width of the coil axes S direction of the magnetic core 11 of antenna 8 is made as L, from coil axes S between be distance till the antenna 8 of the end limit 6a of circuit substrate 6 of substantially vertical relation-preferably-L～+ scope of L in.Thus, described as described above, the axle X of magnetic line of force M is tilted.What is called-L refers to that the end limit 6a that antenna 8 projects to than circuit substrate 6 locates more in the outer part, and so-called giving prominence to-L represents that only whole magnetic core 11 parts of antenna 8 are outstanding from circuit substrate 6.What is called+L, its with-L is opposite, expression antenna 8 is positioned to the inside the position at a distance of L with the end limit 6a of circuit substrate 6.Preferably, when observing the face of circuit substrate 6 from the top, at least a portion of antenna 8 overlaps with circuit substrate 6.In addition, Fig. 6 is equipped with the exploded perspective view of the mobile terminal of antenna of the present utility model in the position different from Fig. 1.In Fig. 6, antenna 8 is equipped on the substantial middle of the back of the body lid 3 of mobile terminal 1.
The below explains the adjustment pattern of adjusting for to the inductance of the antenna 8 of the utility model execution mode as above.
Fig. 7 means the figure that the inductance of the antenna in the utility model execution mode 1 is adjusted.Fig. 7 (a) means not adjusting the figure of the state that pattern repairs.Fig. 7 (b) means the figure that has located to have carried out the state of finishing at the first finishing point of adjusting pattern.Fig. 7 (c) means the figure that has located to have carried out the state of finishing at the second finishing point of adjusting pattern.Fig. 7 (d) is the enlarged drawing of adjusting pattern.
In Fig. 1, when antenna 8 was formed by connecting as antenna assembly with the circuit substrate 6 that is carrying match circuit and other antenna control parts 9, the inductance of antenna 8 became a factor of the resonance frequency that determines this antenna assembly.And the inductance of antenna 8 with structure of present embodiment greatly is subject to the impact of dimensional discrepancy of the magnetic core 11 of Fig. 2～shown in Figure 4.Because as shown in solenoidal self-induction formula (2 powers of the number of turn of self-induction=magnetic permeability * per unit length * solenoid length * sectional area), the impact that is equivalent to the ferrite shape of length and sectional area occurs with proportional relation roughly, so easily understand this thing.
Like this, because there is deviation in the inductance of antenna 8, also deviation can appear so be equipped with the resonance frequency of the antenna assembly of this antenna 8.This resonance frequency is adjusted in the prescribed limit of being counted by the centre frequency (for example the centre frequency of RF-ID is 13.56MHz) of communication standard regulation, thus, can carries out radio communication with high probability and high-quality.At this moment, as long as reduce the inductance deviation (for example as long as suppress in ± 2%) of antenna 8 monomers, just can reduce the resonance frequency of the antenna assembly that is equipped with this antenna 8 is adjusted required adjusting range.Therefore, in the present embodiment, suppress the inductance deviation of the antenna 8 that the dimensional discrepancy by the magnetic core 11 of antenna 8 causes by adjusting pattern 13.
As shown in Fig. 4 (a), the adjustment pattern 13 of regional A and winding pattern 14a, the 14b of regional B are arranged in the antenna 8 of present embodiment.In adjusting pattern 13, a pattern (wire) is divided into 3 adjustment wires along the long side direction of adjusting pattern 13 and namely adjusts wire 13b, adjusts wire 13c and adjust wire 13d.The winding pattern 14a, the conductor width of 14b of zone B are 0.4mm～0.5mm, are spaced apart 0.4mm～0.5mm between adjacent wires, and have been wound around 10 circles.For the conductor width of the adjustment pattern 13 of regional A, the conductor width of the most inboard adjustment wire 13b is roughly the same with the conductor width that is wound around pattern 14a, 14b, is 0.4mm～0.5mm.Other adjustment wire 13c, the conductor width of adjusting wire 13d are 0.3mm, are spaced apart 0.4mm～0.5mm between adjacent wires.In adjusting pattern 13, wire is divided into 3 abreast, and this adjustments wire 13b～13d is connected at adjustment pattern end 13a and external connection terminals 8a place.Certainly, wire can be divided into 2, also can be divided into more than 4, can adjust number according to the size of antenna 8 and the degree of deviation.In addition, be no matter how many bars, the conductor width of adjusting the most inboard adjustment wire 13b in pattern 13 is preferably roughly the same with the conductor width that is wound around pattern 14a, 14b, also can make the live width of in addition adjustment wire 13c etc. less than the live width of adjusting wire 13b.By being attenuated, it can realize miniaturization.The roughly the same reason of the conductor width of adjusting the most inboard adjustment wire 13b in pattern 13 and the conductor width that is wound around pattern 14a, 14b is: during the adjustment of the inductance value of explanation below, as Fig. 7 (c), might only keep by adjustment pattern 13 is repaired and adjust wire 13b.
Adjust wire 13b～13d and extend in parallel to each other on the direction vertical with the coil axes of antenna 8, adjust wire 13b the longest, adjust wire 13d the shortest.Thus, the position of first a finishing point 15a, the second finishing point 15b is configured with staggering, repair being easy to.In addition, adjusting wire 13b～13d extends abreast with winding pattern 14a, 14b.May not need to form abreast so all patterns.In addition, so-called finishing herein refers to by the first finishing point 15a, the second finishing point 15b etc. being carried out punching or laser processing so that pattern broken string (insulation).In addition, be wound around pattern 14a, 14b and adjustment wire 13b～13d basically so that the mode of major part relative with magnetic core 11 (coincidence) configures.Because magnetic core 11 has the effect that flux is concentrated, so in order to obtain efficiently antenna performance, naturally be configured in the above described manner.
The upper formed winding pattern 14b of upside flexible substrate 12b roughly overlaps with the upper formed winding pattern 14a of downside flexible substrate 12a across magnetic core 11.Therefore, in upside flexible substrate 12b and most of zone that formed adjustment pattern 13 on downside flexible substrate 12a overlaps, do not form any parts.Certainly, also can form winding pattern 14b in this part.
The method of adjustment of inductance value then is described.In the present embodiment, be divided into these 3 adjustment wires of adjustment wire 13b～13d because will adjust pattern 13, repair these two finishing points of some 15b so the finishing point is first a finishing 15a, second.That is, be divided into the n bar in the situation that will adjust pattern 13, form (n-1) individual finishing point, by the arbitrary place in this finishing point is repaired or do not repair, adjust inductance value.
In Fig. 7 (a)～Fig. 7 (c), from being connected with external connection terminals 8a adjusting pattern end 13a, thereby the distance of the adjustment wire 13b～13d that can be considered a wire till the end 11a of magnetic core 11 is different.In addition, adjust the end 11a almost parallel of wire 13b～13d and magnetic core 11, although can according to the relation configuration about positive and negative 45 degree of mutual inclination, not be also to be vertical relation at least.
In Fig. 7 (a), 3 arbitrary of adjusting in wire 13b～13d are not repaired.Therefore, adjust pattern 13 as near heavy gauge wire 1 the end 11a that is configured in magnetic core 11 and performance function, adjustment wire 13d is in the outermost of coil pattern.And, the near distance till from outermost adjustment wire 13d to the end 11a of magnetic core 11.
In Fig. 7 (b), adjust pattern 13 and be trimmed (insulation) at the first finishing point 15a place.What therefore, in fact bring into play function in adjustment pattern 13 is only to adjust wire 13b, 13c.Consequently adjust the outermost that wire 13c is in coil pattern, compare with Fig. 7 (a), the distance till from outermost adjustment wire 13c to the end 11a of magnetic core 11 becomes far away.
In Fig. 7 (c), adjust pattern 13 and be trimmed at the second finishing point 15b place.What therefore, in fact bring into play function in adjustment pattern 13 is only to adjust wire 13b.Consequently adjust the outermost that wire 13b is in coil pattern, compare with Fig. 7 (a), Fig. 7 (b), the distance till from outermost adjustment wire 13b to the end 11a of magnetic core 11 becomes far away.
With coil winding around the magnetic core and in the aerial coil of the structure as present embodiment that consists of, the two end portions that is not wound with the magnetic core of coil becomes the gateway of the flux of antenna.Therefore, the aerial coil that the number of turn is identical has following tendency: the gateway of flux is larger, and inductance value more increases.Fig. 7 (a) is the state of the gateway minimum of this flux, and Fig. 7 (c) is the state of the gateway maximum of this flux.
Thus, because different from adjusting the distance of wire 13b～13d till the end 11a of magnetic core 11, so the size of the gateway of flux changes, its result can be adjusted the inductance value of antenna 8.
In addition, no matter in the situation that Fig. 7 (b) or in the situation that Fig. 7 (c), as long as a place is repaired.That is, no matter will adjust pattern 13 and be divided into how many bars, adjust wire 13b, 13c, 13d for many ... two ends all be connected with external connection terminals 8a side adjusting pattern end 13a side, and arranged side by side.Therefore, as long as so that the distance between the end 11a of the length of coil pattern and magnetic core 11 and adjustment pattern 13 becomes the mode of the distance of expectation, setting is left several several adjustment wires (from the outside of magnetic core 11) of adjusting wires (from the inboard of magnetic core 11) and will cutting off adjusting pattern 13, and only the place between them is repaired and get final product.Like this, be left the inboard that the adjustment wire of adjusting pattern 13 must be configured in magnetic core 11, the adjustment wire of disconnection must be configured in the outside of magnetic core 11, thus, the finishing point can be made as a place, thereby can easily adjust the inductance value of antenna 8.Certainly, the adjustment conductor configurations that for example also can cut off is being left between the adjustment wire of adjusting pattern 13, but in the case, needs a plurality of finishing points.
In Fig. 2, in the situation that antenna 8 is configured near the end of circuit substrate 6, is positioned at than being wound around pattern 14a with adjustment pattern 13 and more leans on the mode at the place, inboard of circuit substrate 6 to be configured.But also can be configured to, adjustment pattern 13 is positioned at than being wound around pattern 14a more lean on the outside of circuit substrate 6.But, in the time of near finishing point 15a, 15b are positioned at external connection terminals 8a, 8b, be easier to realize miniaturization, therefore, by adjustment pattern 13 is configured in than being wound around pattern 14a more by the place, inboard of circuit substrate 6, external connection terminals 8a, 8b can easily be connected in miscellaneous part.In addition, finishing point 15a, 15b and external connection terminals 8a, 8b need not to configure in the mode that overlaps with magnetic core 11, therefore, are configured in the outside of magnetic core 11.Because by punching or laser processing, finishing point 15a, 15b are repaired, if finishing point 15a, 15b overlap with magnetic core 11, be difficult to repair.In addition, the part of external connection terminals 8a, 8b, therefore, need not to overlap with magnetic core 11 without direct correlation with inductance value, and the zone that is preferably the coil portion part (winding pattern) that correspondingly makes on magnetic core 11 increases.That is, configure finishing point 15a, 15b and external connection terminals 8a, 8b in the mode that does not overlap with magnetic core 11, thus, can take into account the miniaturization of magnetic core 11 and the inductance value of antenna 8 and improve.That is, preferably, adjustment wire 13c, 13d at least a portion separately are configured in the outside of magnetic core 11.And, make finishing point 15a, 15b can be positioned at the part that is configured in the outside.In addition, need not at least a portion of the most inboard adjustment wire 13b is configured in the outside of magnetic core 11, it both can be configured in the outside of magnetic core 11, also can not be configured in the outside of magnetic core 11.
In addition, if increase to adjust the Segmentation Number of pattern 13, make a pattern namely adjust the regional A of pattern 13 excessive, can cause antenna 8 to become large.Therefore, although according to the adjusting range of the expectation of inductance value and difference, but as general benchmark, be set as the width of regional A: the width of regional B=80% (70%～90% left and right): 20% (10%～30% left and right), can realize thus miniaturization and obtain sufficient inductance value adjusting range.That is, regional A is greater than regional B.
In the situation that use the antenna 8 shown in Fig. 2 etc. to carry out inductance adjustment in the mode of Fig. 7, obtained following result.
Following (table 1) is that the model slightly different according to size and Fig. 2 etc. carries out the result that research institute gets, that size with FERRITE CORE is made as 40mm * 12mm * 0.3mm, the number of turn is made as 8, only outermost pattern is made as the adjustment pattern, and is divided into 3 and carry out side by side model.(table 1) be free space (metallic object is kept off), adjust pattern 13 and metallic object (for example circuit substrate 6) closely relative situation, and adjust the result of the inductance value adjustment in not relative with metallic object these the three kinds of situations of situation of pattern 13.Be illustrated under each situation, when not repairing, when finishing point 15a place has carried out finishing and variable quantity, the rate of change of the inductance value L when finishing point 15b place has carried out repairing and the inductance value L that caused by finishing.At this moment, variable quantity and rate of change are take the situation of not repairing as benchmark.
[table 1]
According to (table 1) as can be known: in antenna 8 is configured in free space, and metallic object is not configured near the situation of (metallic object does not impact antenna 8) antenna 8, the maximum change of inductance value nearly 4% can be carried out the adjustment of this degree.
Then, configured and comprised the downside flexible substrate 12a that adjusts pattern 13 to be close to relative mode with metallic object.Metallic object and the gap between pattern of this moment are set as 30 μ m.At this moment, for the size of the gateway of flux, it is large that the impact of approaching metallic object becomes, and the impact of adjusting pattern 13 almost disappears, and the inductance value maximum has nearly changed 0.2%.That is, carry out for needs the situation that minimum inductance value adjusts useful.
At last, configured in not relative with metallic object mode and comprised the downside flexible substrate 12a that adjusts pattern 13.That is, adopted configuration relation shown in Figure 2.Gap between the coil pattern of metallic object at this moment and antenna is set as 30 μ m too.At this moment, the impact of the metallic object that the size of the gateway of flux is approached and this two impacts that affect of adjusting pattern 13, the inductance value maximum has changed 7.5%.That is, adjust the deviation of the inductance value of the antenna 8 that the deviation by the size of magnetic core 11 etc. causes in can be on a large scale, it is large that the allowed band that inductance is adjusted becomes.
According to the above results, be no matter to adjust pattern 13 to configure with the right mode of Metal Phase, or adjust pattern 13 not configure with the right mode of Metal Phase all have advantages of different.Therefore, adjust pattern 13 and can be arranged on two faces of downside flexible substrate 12a, upside flexible substrate 12b, also can only be arranged on one of them face.Yet, in the situation that be arranged on two faces, preferred so that a mode that does not overlap is put in finishing, for example be respectively formed at the right and left of coil pattern.
Fig. 8 means the figure of adjustment result of the inductance value of the utility model execution mode 1, and Fig. 9 means the figure of adjustment result of the deviation of the inductance value in the utility model execution mode 1.In addition, be provided with in not relative with metallic object (circuit substrate 6) mode and adjust pattern 13 this moment.In the research of Fig. 8 and Fig. 9, the size that Fig. 2, Fig. 3 etc. put down in writing, the antenna model of shape have been used.
Fig. 8 (a) is illustrated in the situation of repairing as Fig. 7 (a), in the scope of the wide 33.2mm～33.8mm of horizontal stroke (the directions X width of Fig. 2), vertical wide 13.4mm～14mm (the Y-direction width of Fig. 2), thickness 0.27mm～0.33mm, the thickness of the magnetic core 11 when changing respectively the size of magnetic core 11 and the relation between inductance value.Fig. 8 (b) is illustrated under the situation identical with Fig. 8 (a), the inductance value the when mode of minimum is suitably repaired (adjustment) so that the distribution of the inductance value integral body shown in Fig. 8 (a) becomes.That is, Fig. 8 (a) expression is adjusted inductance value result before by finishing, and Fig. 8 (b) expression is adjusted inductance value result afterwards by finishing.
Each inductance value shown in Fig. 9 (a) presentation graphs 8 (a) is with respect to the extent of deviation of the average inductance value of the inductance value integral body shown in Fig. 8 (a).That is, the relation between the deviation of the thickness of inductance value magnetic core 11 before and inductance value is adjusted in expression by finishing.
The deviation of each inductance value shown in Fig. 9 (b) presentation graphs 8 (b) is with respect to the degree of the average inductance value of the inductance value integral body shown in Fig. 8 (b).That is, the relation between the deviation of the thickness of inductance value magnetic core 11 afterwards and inductance value is adjusted in expression by finishing.
According to Fig. 8 (a), Fig. 9 (a) as can be known: if do not adjust inductance value, as long as the directions X width of magnetic core 11 and Y-direction width produce 1%～2% the deviation of just breaking a promise, inductance value just produces 5% the deviation of just breaking a promise.In order to produce practical antenna 8, even for example need the directions X width of magnetic core 11 and Y-direction width to produce just to break a promise 1%～2% deviation, the deviation of inductance value is also just being broken a promise in 2%.
Adjust pattern 13 by forming as present embodiment, can address the above problem.
Because the inductance value of the antenna 8 of Fig. 8 (a) presentation graphs 7 (a), so as mentioned above, inductance value is lower.That is, if with Fig. 7 (a) be not trimmed to benchmark, in inductance value of the present utility model was adjusted, inductance value was adjusted to increasing direction.And as shown in Fig. 8 (a), the thickness of magnetic core 11 is larger, and inductance value is also larger.On the other hand, irrelevant with the thickness of magnetic core 11 by the inductance value adjustment based on finishing in Fig. 8 (b), obtain the inductance value of roughly the same degree.
In addition, according to Fig. 9 (a), Fig. 9 (b) also as can be known: the extent of deviation by the finishing inductance value diminishes.
Figure 10 means the figure of example of manufacturing process of the antenna of the utility model execution mode 1.And with exploded perspective view shown in Figure 3, this manufacturing process is described.
As mentioned above, at least one face in the face relative with downside flexible substrate 12a or upside flexible substrate 12b of magnetic core shown in Figure 3 11, though not shown, be reserved with spacing and be the slit of several millimeters.This slit is when making magnetic core 11, forms before calcination process.Stage before this calcination process is so that magnetic core 11 also is difficult for dividing the size of cracked degree, the degree of depth to form slit at slit portion after calcining.
Like this, complete and be provided with the magnetic core 11 of slit for calcination process, attach double faced adhesive tape (the step S1 of Figure 10) on its face relative with downside flexible substrate 12a or upside flexible substrate 12b.
Such as using roller etc., any face that is pasted with double faced adhesive tape of magnetic core 11 is pressed (the step S2 of Figure 10).Like this, at least a portion of magnetic core 11 is cut apart by slit, becomes the state that is made of a plurality of small pieces.Nonetheless, because be pasted with boundary belt (double faced adhesive tape) on two faces of magnetic core 11, so magnetic core 11 can not disperse.And, the magnetic core 11 that becomes this kind state can be attached and is configured along its curved surface of person on the back of the body lid 3 of mobile terminal shown in Figure 11.In addition, when assembling aerial 8, or when antenna 8 being mounted to mobile terminal 1 (with reference to Fig. 1) etc., even stress is applied to magnetic core 11, this magnetic core 11 can be not cracked yet.And the support film of above-mentioned double faced adhesive tape prevents that double faced adhesive tape from investing roller or the operation post relative with it when carrying out roll-in.
As mentioned above, can be configured in the magnetic core 11 of bending to a certain degree downside flexible substrate 12a upper (the step S3 of Figure 10).Like this, after magnetic core shown in Figure 3 11 being configured on downside flexible substrate 12a, next the upside from magnetic core 11 configures upside flexible substrate 12b.12b carries out contraposition to the upside flexible substrate, so that magnetic core 11 is configured in the inboard (the step S4 of Figure 10) of the dotted line shown in Fig. 4 (b).
After carrying out contraposition in the above described manner, downside flexible substrate 12a and upside flexible substrate 12b are carried out scolding tin engage (the step S5 of Figure 10).In Fig. 3, as long as each Copper Foil position each other is respectively consistent, and downside flexible substrate 12a is carried out scolding tin with upside flexible substrate 12b engages, can form a coil pattern.
The intersection of pattern exposed division 17a and 19a and the intersection of pattern exposed division 17b and 19b are welded, carry out thus scolding tin and engage.At last, double faced adhesive tape is invested the side that does not configure magnetic core 11 (the step S6 of Figure 10) of downside flexible substrate 12a.
By using step as above, can be extremely simply and assemble accurately antenna shown in Figure 28.As shown in Figure 3, adopt following structure: in advance double faced adhesive tape is invested two planes of magnetic core 11, weld afterwards with flexible substrate 12 contrapositions.Therefore, even just in case magnetic core contraposition failure, still can contraposition again before welding.Thus, can reduce the assembling disqualification rate of antenna shown in Figure 28.
(execution mode 2)
The antenna 108 of present embodiment 2 is compared with the antenna 108 of execution mode 1, and the structure of adjusting pattern is different.Structure in addition is not as long as specify hereinafter, and is basic identical.
Figure 11 means the figure of the flexible substrate in the utility model execution mode 2.Figure 11 (a) is from observing the being seen figure of downside flexible substrate 112a with the bearing surface of magnetic core 111 butts.Figure 11 (b) is from observing the being seen figure of upside flexible substrate 112b with the bearing surface of magnetic core 111 butts.
The upper formed winding pattern 114a of flexible substrate 112a, the 112b of present embodiment, 114b only are spiral helicine coil pattern.As shown in Figure 11 (a), be provided with and the one-sided adjustment pattern 113 that pattern t is connected, the adjustment pattern 113 that namely will describe in detail cut apart that is positioned at the outermost edge.This adjustment pattern 113 comprises a plurality of pattern v that draw, above-mentioned a plurality of one-sided ends of drawing pattern v with cut apart pattern t and be connected.And, this adjustment pattern 113 comprises and connects pattern w, and this connections pattern w links the above-mentioned outstanding side end (being positioned at the end in the outside of magnetic core 111 profiles shown in dotted line) of not drawing pattern z with the protuberance of a part of cutting apart the protuberance y that another each one-sided end that pattern t is connected and formation cut apart pattern t of drawing pattern v.As long as it is consistent that each Copper Foil of Copper Foil 116a and Copper Foil 118a, Copper Foil 116b and Copper Foil 118b position is each other distinguished, and downside flexible substrate 112a is carried out scolding tin with upside flexible substrate 112b engage, can form a coil pattern.
In addition, in the present embodiment, above-mentioned adjustment pattern 113 only is arranged on downside flexible substrate 112a side.With respect to this, a plurality of winding pattern 114a of the formation coil pattern shown in Figure 11 (a) and Figure 11 (b) and 114b are arranged at downside flexible substrate 112a and upside flexible substrate 112b dividedly.On downside flexible substrate 112a, adjust pattern 113 except being provided with, also be provided with external connection terminals 108a and 108b, and downside flexible substrate 112a has the profile greater than upside flexible substrate 112b.And, this is adjusted the part (that is, whole connection pattern w and a part of drawing pattern v) of pattern 113, the part of protuberance y of cutting apart pattern t and external connection terminals 108a and 108b and is configured in than the profile of the magnetic core 111 shown in dotted line and upside flexible substrate 112b and locates more in the outer part.In other words, can say a part away from this adjustment pattern 113 of the periphery of magnetic core 111 and upside flexible substrate 112b ground configuration.
Thus, when the assembling of antenna 108 was completed, external connection terminals 108a and 108b can not covered by magnetic core 111 and upside flexible substrate 112b.Thus, as shown in Figure 1, external connection terminals 108a and 108b can be connected with the circuit substrate 6 that is configured in its opposite face, and by connecting, can consist of antenna assembly.
In addition, do not had at least the pattern of connection w by the adjustment pattern 113 of magnetic core 111 and upside flexible substrate 112b covering.And, if wait the protuberance that makes consist of to adjust pattern a plurality of draw any in pattern v or consist of the part of the protuberance y of cutting apart pattern t to draw pattern z broken string by finishing, when the assembling of antenna 108 is completed, can adjust its inductance.
Draw the profile part more in the outer part that pattern v or protuberance are drawn the magnetic core 111 shown in ratio dotted line in pattern z in Figure 11, carry out the finishing for the coil pattern of the inductance of adjusting antenna 108.Above-mentioned part is not covered by magnetic core 111 and upside flexible substrate 112, therefore, can easily carry out dressing operation.
For example draw pattern z and cut off when all drawing pattern v, draw adjacent the drawing pattern v and cut off that other are when all drawing pattern v, difference that be wound on the number of turn of the coil pattern around magnetic core 111 is c of pattern z with only keeping with protuberance at the protuberance that only keeps Figure 11.And the inductance of antenna 108 changes the amount suitable with this difference.
In addition, in Figure 11, may not cut apart pattern t what consist of coil pattern, arrange and be positioned at the protuberance y that locates more in the outer part than the profile of magnetic core 111.Yet if this protuberance y is arranged, as described in explanation before, the protuberance that consists of the part of this protuberance y is drawn the inductance that pattern z also helps to adjust coil pattern.The pattern t of cutting apart that consists of coil pattern has and is positioned at the protuberance y that locates more in the outer part than the profile of magnetic core 111, thus, even if antenna shown in Figure 2 108 is small size antenna, still can guarantee fully the adjustment surplus of the inductance of coil pattern.And the protuberance y of Figure 11 is the part that helps to adjust the inductance of coil pattern together with adjusting pattern 113, therefore, its must be arranged on the flexible substrate of adjusting pattern 113 same side on.In the present embodiment, protuberance y is arranged on downside flexible substrate 112a together with adjusting pattern 113.
Figure 12 is the stereogram that schematically shows the antenna of the utility model execution mode 2.Figure 12 (a) is the stereoscopic figure that schematically shows the antenna of present embodiment.Figure 12 (b) is for the perspective elevation of the aerial coil that the antenna shown in Figure 12 (a) schematically is described with the winding of adjusting pattern.
Though be illustrated in Figure 11, but in Figure 12 (b), adjust the part of pattern 113, expression is wound around the part of protuberance y of coil pattern f of pattern 114a, 114b and external connection terminals 108a and 108b and is configured in than the profile of the magnetic core 111 shown in dotted line and locates more in the outer part simply.In other words, configured peripherally the part of above-mentioned adjustment pattern 113 away from the profile of magnetic core 111.In addition, the coil pattern f in Figure 12 is made of winding pattern 114a and 114b in Figure 11.Here, although the number of turn of the coil pattern that in fact is made of above-mentioned winding pattern 114a and 114b is 10 circles, omit the coil pattern f that the number of turn shows Figure 12.In addition, about adjustment pattern 113 shown in Figure 12, although from the coil pattern f that is arranged in magnetic core 111 belows draw to draw number different from the adjustment pattern 113 of Figure 11, this is also showed in the abridged mode.No matter in being arranged at the adjustment pattern 113 of antenna shown in Figure 12 108, where trim locations when the inductance of antenna 108 is adjusted is positioned at, the line length of whole aerial coil is also roughly fixing, and only is wound in the line length change of the part of magnetic core 111, therefore can adjust inductance.That is, in Figure 12, the line length till from an external connection terminals 108a to another external connection terminals 108b is roughly fixing.Like this, the antenna 108 in the utility model embodiment is characterised in that: can roughly keep regularly the line length of whole aerial coil, and can adjust the inductance of whole antenna 108.
Then, narration is arranged at the method for trimming of the adjustment pattern 113 of antenna shown in Figure 12 108.
Figure 13 means the figure of the finishing example of the adjustment pattern 113 that is arranged at antenna shown in Figure 12 108.Figure 13 (a) means the figure of the finishing example of the adjustment pattern 113 the when inductance that makes antenna shown in Figure 12 108 is maximum.Figure 13 (b) means the figure of the finishing example of the inductance adjustment pattern 113 hour that makes antenna shown in Figure 12 108.And Figure 14 is the antenna 108 that schematically represents corresponding in Figure 13, the figure of the example of the trim locations of the adjustment pattern 113 on the downside flexible substrate 112a of the antenna 108 shown in expression Figure 11 (a).
As shown in figure 14, the trim bit of the adjustment pattern 113 on the downside flexible substrate 112a of the antenna 108 in the utility model embodiment is equipped with these 7 points of A～G.This trim locations is in draws the upper and protuberance of pattern v and draws on pattern z, this protuberance draw pattern z linking protuberance y with cut apart between pattern t intersection point and with the intersection point that is connected between pattern w.
Like this, as long as stick coil pattern f and the position that be connected of adjustment between pattern 113 are made as arbitrary place in trim locations A～G, just can adjust the inductance of the antenna 108 of present embodiment.That is, for Figure 12 and coil pattern f shown in Figure 13, the pattern t of cutting apart that keeps a part that consists of coil pattern f in Figure 14 reaches outside magnetic core 111 with the part that is connected of adjusting between pattern 113.And the part that remains in external connection terminals 108b side is helpless to form the inductance of Figure 12 and antenna 108 shown in Figure 13.
[table 2]
The example of the measurement result of the inductance of the antenna 108 when (table 2) expression is not repaired the arbitrary place in each trim locations A～G shown in Figure 14.In antenna in this measurement result, Figure 12 and magnetic core 111 shown in Figure 13 are made of the ferrite of 14.5mm * 38mm * 0.3 thick mm, and the number of turn that is wound in the coil pattern f around it is 10 circles.Initial inductance when all trim locations A～G shown in Figure 14 not being repaired in addition,, antenna 108 is 3.74 μ H.That is, if the initial inductance of table 2 expression antenna is 3.74 μ H, can be adjusted to the scope of 3.85 ± 0.07 μ H (namely ± 2%).Therefore, in the situation that will be made as the inductance of adjustment aim 3.85 μ H on the contrary, as long as initial inductance is distributed in the scope of 3.74 μ H ± 2%, can roughly be adjusted into 3.85 μ H.
Like this, by only keeping the place in trim locations A～G, and cut off other whole trim locations, thereby adjust the inductance that the antenna 108 of present embodiment has.Can utilize punching to process the trim locations of relevant portion is carried out punching, carrying out thus described cut-out, also can utilize laser etc. to carry out calcination to the conductive pattern of the trim locations that is in relevant portion, carrying out thus described cut-out.Here, laser can more promptly be repaired, and the space that need not to punch and process required platform or be used for compressing, and therefore, can make and adjust pattern 113 compactnesses.
Like this, no matter make a part that consists of Figure 12 and coil pattern f shown in Figure 13 Figure 14 cut apart pattern t with adjust position that pattern 113 still keeps being connected be in trim locations A～G where, the line length of Figure 12 and coil pattern f shown in Figure 13 is roughly fixed.Yet the line length of the part that is wound in magnetic core 111 of coil pattern f can be according to keeping where changing in trim locations A shown in Figure 14～G.Therefore, can under the line length that makes Figure 12 and whole coil pattern f shown in Figure 13 keeps fixing state, adjust the inductance of antenna 108.In addition, be not arranged on the open interior of coil pattern because adjust pattern 113, so no matter carry out which kind of finishing, the aperture area of the antenna 108 of present embodiment can not change yet.Consequently the characteristics such as Q value of whole antenna 108 also are difficult for changing, and therefore, the deviation of the performance that the antenna 108 after inductance is adjusted has is little.
Figure 15 and Figure 16 mean the figure of finishing example of the adjustment pattern 113 of the antenna 8 that is arranged at Figure 12, the example that its expression is different from Figure 13.
Same with Figure 13 (a), Figure 15 (a) means the figure of the finishing example of the adjustment pattern 113 the when inductance that makes antenna shown in Figure 12 108 is maximum, but compares with Figure 13 (a), has increased by a trim locations g of place.By a trim locations g of place who increases, can prevent the impact of the noise of sneaking into from antenna 108 peripheries.
Figure 15 (b) also means the figure of the finishing example of the adjustment pattern 113 the when inductance that makes antenna shown in Figure 12 108 is maximum.Only a place is repaired.That is, in corresponding therewith Figure 14, the protuberance of the protuberance that is in coil pattern t is drawn pattern z or adjusted drawing between pattern v and the intersection point that is connected pattern w of pattern 113 and repair.Therefore, have the following advantages: it is few that the inductance of antenna 108 is adjusted the spent time, is easy to make.
In the method for adjustment of utilizing finishing as above, in the situation that the inductance of antenna 108 is set as other values, as long as adjust pattern 113 draw pattern v and the intersection point that is connected pattern w in 2 adjacent intersection points between, connection pattern w repaired get final product.
When method of adjustment as above was adopted in Figure 16 (a) expression, result reached the finishing example in the situation of maximum induction.In addition, Figure 16 (b) expression is repaired with the intersection point that is connected pattern w the pattern v that draws that adjusts pattern 113, makes the situation of the inductance maximum of antenna 108.
Figure 17 means the stereogram of the antenna that is provided with the present embodiment of adjusting pattern in the both sides of magnetic core.Like this, adjust pattern if increase, also can increase the adjusting range of the inductance of antenna 108d.The adjusting range of the inductance of antenna 108d shown in Figure 17 is about 2 times of antenna shown in Figure 12 108.
Figure 18 disposes the stereogram of the antenna 108e of external connection terminals 108f and 108g on the position different from antenna 108 shown in Figure 12.Like this, as long as external connection terminals is in the position away from the profile of magnetic core 111, can be disposed at any position.
In addition, the flexible substrate in execution mode 1 and present embodiment has adopted the 2 plate base structures that are made of downside flexible substrate and upside flexible substrate, assembles but also can make above-mentioned upside flexible substrate and downside flexible substrate be connected as a single entity and be bent.In addition, also can on the side of the opposition side that is provided with a side of adjusting pattern 113, make downside flexible substrate 112a and upside flexible substrate 112b be connected as a single entity and be bent and assemble.
Above-mentioned each execution mode of the present utility model has been narrated the magnetic core 111 with certain specific dimensions and the antenna 108 with regulation number of turn, but the scope of application of the present utility model is not limited to the respective embodiments described above, and it can be applicable to have the magnetic core of any size and the antenna of the number of turn.
The Japanese patent application laid of submitting on February 17th, 2012 is willing to the specification that comprises for No. 2012-032317, the disclosure of drawing and description summary, is fully incorporated in the application.
According to the utility model, can realize antenna small-sized and that inductance value is stable, can keep the communication characteristic of antenna, therefore, as antenna, antenna assembly and the communicator of the various electronic equipments such as mobile phone of great use.In addition, the utility model can also be specially adapted to automatically to manage the accepting rack of commodity, books etc., the purposes such as pharmaceuticals management, hazardous material management and valuables management system beyond showing stand.
Claims (17)
1. antenna comprises:
The magnet magnetic core;
Coil winding section, it forms around being wrapped in described magnet magnetic core by wire; And
The adjustment part, it is connected in an end of described coil winding section,
Described adjustment part comprises that many are adjusted wires, described many to adjust wires are the wires that will be connected with an end of described coil winding section with the crossing direction of the winding direction of principal axis of described coil winding section on be divided into many and form,
Described many adjustment wires interconnect at two ends.
2. antenna as claimed in claim 1,
Described adjustment part is configured in the end of described magnet magnetic core.
3. antenna as claimed in claim 1 or 2,
The long side direction of described adjustment part is vertical with the winding axle of described coil winding section.
4. antenna as claimed in claim 1 or 2,
Described many to adjust wires parallel with the wire of described coil winding section.
5. antenna as claimed in claim 1 or 2,
In described adjustment part, the described many adjustment wires by coil winding section side of adjusting in wires are thicker than other adjustment wires.
6. antenna as claimed in claim 5,
Described the most identical with the width of the wire of described coil winding section by the width of the adjustment wire of coil winding section side.
7. antenna as claimed in claim 1 or 2,
Interval between wire in described coil winding section is greater than the interval between the wire in described adjustment part.
8. antenna as claimed in claim 1 or 2,
Described coil winding section is that the wire that will be formed on the first flexible substrate and the second flexible substrate interconnects and consists of,
Described the first flexible substrate and described the second flexible substrate this magnet magnetic core of mode clamping to cover described magnet magnetic core.
9. antenna as claimed in claim 1 or 2,
Described many adjustment wires are 3.
10. antenna as claimed in claim 1 or 2,
Adjust wires and comprise and the stacked part of described magnet magnetic core and not stacked with described magnet magnetic core part for described many.
11. antenna as claimed in claim 1 or 2,
Adjust the formed area of wire less than the formed area of described coil winding section for described many.
12. antenna assembly comprises:
Metallic object; And
Antenna claimed in claim 1,
Described antenna and described metallic object contiguously or be separated by near configuration.
13. antenna assembly as claimed in claim 12,
At least a portion of described antenna is towards metallic object.
14. antenna assembly as claimed in claim 12,
At least a portion of described wound portion is towards metallic object, and at least a portion of described adjustment part is not towards metallic object.
15. antenna assembly as claimed in claim 12,
The opening of described coil winding section and regions perpendicular towards the described metallic object of described antenna.
16. antenna assembly comprises:
Metallic object; And
Antenna as claimed in claim 8,
Described antenna and described metallic object contiguously or be separated by near configuration.
17. communicator comprises the described antenna assembly of claim 12.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2012-177027 | 2012-08-09 | ||
| JP2012177027A JP5263434B1 (en) | 2012-08-09 | 2012-08-09 | Antenna, antenna device, and communication device |
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| Publication Number | Publication Date |
|---|---|
| CN203277640U true CN203277640U (en) | 2013-11-06 |
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| CN 201320148990 Expired - Fee Related CN203277640U (en) | 2012-08-09 | 2013-03-28 | Antenna, antenna device and communication device |
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|---|---|---|---|---|
| JP2004200829A (en) * | 2002-12-17 | 2004-07-15 | Furukawa Electric Co Ltd:The | Rf id tag |
| JP4424151B2 (en) * | 2004-10-20 | 2010-03-03 | パナソニック株式会社 | Antenna device and communication system using the same |
| JP2009071413A (en) * | 2007-09-11 | 2009-04-02 | Hitachi Ltd | Antenna and rfid |
| JP2009290776A (en) * | 2008-05-30 | 2009-12-10 | Tdk Corp | Manufacturing method of planar antenna element, and planar antenna element |
| WO2010001469A1 (en) * | 2008-07-02 | 2010-01-07 | 三菱電機株式会社 | Wireless communication device |
| WO2010089914A1 (en) * | 2009-02-05 | 2010-08-12 | 株式会社村田製作所 | Magnetic antenna |
-
2012
- 2012-08-09 JP JP2012177027A patent/JP5263434B1/en not_active Expired - Fee Related
-
2013
- 2013-03-28 CN CN 201320148990 patent/CN203277640U/en not_active Expired - Fee Related
Cited By (8)
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| CN103779653A (en) * | 2013-11-18 | 2014-05-07 | 深圳市九思泰达技术有限公司 | NFC antenna and apparatus |
| CN104659473A (en) * | 2013-11-25 | 2015-05-27 | 上海德门电子科技有限公司 | Three-dimensional NFC (Near Field Communication) antenna |
| CN103762424A (en) * | 2014-01-08 | 2014-04-30 | 深圳顺络电子股份有限公司 | Nfc antenna |
| CN107431267A (en) * | 2015-03-10 | 2017-12-01 | 阿莫技术有限公司 | Anneta module and the portable equipment with the Anneta module |
| CN107431267B (en) * | 2015-03-10 | 2019-11-05 | 阿莫技术有限公司 | Anneta module and portable equipment with the Anneta module |
| CN110268577A (en) * | 2017-02-06 | 2019-09-20 | 日本电业工作株式会社 | Antenna structure |
| US10887994B2 (en) | 2018-07-09 | 2021-01-05 | Samsung Electro-Mechanics Co., Ltd. | Antenna substrate and antenna module including the same |
| US11503713B2 (en) | 2018-07-09 | 2022-11-15 | Samsung Electro-Mechanics Co., Ltd. | Antenna substrate and antenna module including the same |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2014036363A (en) | 2014-02-24 |
| JP5263434B1 (en) | 2013-08-14 |
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| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
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| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20131106 Termination date: 20200328 |