Method and Apparatus Pertaining to an RFID Tag Reader Antenna Array

This invention generally, in detail, regards RFID tag reader antenna array RFID (Radio Frequency IDentification) in regard to the reading of the tag.

[Cross reference of related application]<br /> Long-cherished desire is continuation application of the American patent application 12/900,191st number of 2010 October 7 date, you insist the profit. The whole of particular application it is invoked to this bill by reference.

The RFID tag it is known in particular technical field. These generally known tags often the label or take the form of the tag literally, but the goods where that indicates depending upon when, and/or it is unified to the packing. The RFID tag usually, has with the integrated circuit and one or the plural antennas. The integrated circuit usually, executes various functions such as irregularity and recovery, data retention, and data processing of the Radio Frequency signal. As for the integrated circuit of part, active namely (the whole or part that) is power source built-in type, the other integrated circuit is passive. Namely, (it depends) on the external power source of the RFID tag reader and the like completely, it supports the function which sometimes is used.

A proposition that has done it utilizes the RFID tag in order to identify individual list of items individually. Electronic Product Code which is managed as one result regarding this, by EPC global (EPC) it is. The RFID tag which is based on EPC respectively has had the serial number of one way, with this, each tag, furthermore, in the tag which relates relation one at a time each list of items which is attached is identified uniquely.

Each list of items is grasped the production facility, the freight container, in relay area or the retail display territory, by the fact that it can identify uniquely, the beneficial opportunity is offered large number. The tag, especially, reading of the mass tag is the topic which is tackled in particular technical field. In regard to the reading of this tag, for example the specified access position where the plural RFID tags for multi lists of items are controlled and are narrow are closed relatively and (, the entrance to indoor relay area) there is many a thing which is grasped the occasion where it passes from dispatch center. Or, for example, the RFID tag being wider, when it has been distributed to the territory where control is difficult to take, the RFID tag is grasped mostly, by the hand-held RFID tag reader to which worker of charge selectively makes through the tag group move.

<p><patcit num="1"><text>The American patent application 2003 0201940 number bill</text></patcit><patcit num="2"><text> American patent application 2008 0284656 number bill</text></patcit><patcit num="3"><text> American patent application 2008 0036674 number bill</text></patcit></p>

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<p num="0007"> The technique which relates has succeeded the ru, it is effective, but even then, it is not possible to cope with all useful applied examples. For example, the tag you grasp and practicality and/or from economic viewpoint, extremely at the time of large-sized possesses the RFID tag relatively mainly facilitating (especially, frequency is high large-scale and reading of the tag which it is continual) to do when it is suited well always not to be inclined, it is suitable with you cannot call the technique which relates excessively. </p><p num="0008"> This invention designates that the utilization of RFID is improved as purpose. </p>

<p num="0009"> General, these various execution forms according to part, according to this invention at least, one which possesses the RFID tag reader antenna which forms the 1/X angle of 360 degree RFID tag reader antenna array respectively or the plural frame components are offered. In order to form the compound frame component by at least connecting to one other above-mentioned frame component physically, to be constituted it is possible the above-mentioned frame component. According to one technique, as for the above-mentioned compound frame component, desirably, symmetrical circle, the polygon of symmetrical form such as square or octagon is included in cross direction the medial axis as a center. According to this invention, furthermore, one which possesses the portion of the above-mentioned frame component or plural RFID tag reader antenna installation tools furthermore are offered. In order to direct the RFID tag reader antenna of correspondence outside the above-mentioned frame component, to be constituted it is possible the above-mentioned RFID tag reader antenna installation tool. According to one technique, the above-mentioned RFID tag reader antenna is formed, installing one antenna element at least with angle of the downward look, in order to keep. Angle of the particular downward look is selected as function of height of the above-mentioned frame for RFID tags of a quantity which at least, is expected. In any case, 360 degree RFID tag reader antenna array where the plural RFID tag reader antennas are arranged by connecting X above-mentioned frame component together with this constitution, is offered. </p><p num="0010"> Than as many as X may be the ideal integer which is larger 1 . As a useful example, at least, X is, 2, 4 or 8. </p><p num="0011"> According to one technique, as the 1st group of the above-mentioned plural RFID tag reader antennas, is arranged with abbreviation identical inclined angle, the 2nd group of the above-mentioned plural RFID tag reader antennas, the above-mentioned abbreviation identical 1st inclined angle is arranged with the abbreviation identical 2nd inclined angle which differs. If it is necessary, the antenna of the 1st group is arranged the antenna of the 2nd group and alternately. </p><p num="0012"> This invention corresponds to the various RFID tag reader antennas easily. As for this, for example, the flat antenna and/or the phase door ray antenna can include. </p><p num="0013"> In addition, these execution forms according to part, according to this invention at least, when the plural RFID tag reader antenna sections, the RFID tag is while facilitating, for example it arranges in the position where it is higher than expectation position of 90% RFID tag at least. According to one technique, as for these plural RFID tag reader antenna sections, it is possible to arrange in abbreviation same height in within everything and the facility. In any case, it is possible to hide the RFID tag reader antenna section, visual, or it does not hide and also the te is good. For example, correspondence it covers the RFID tag reader antenna section and, (the shroud) partly or is possible to hide entirely inside, or, on the ceiling reverse side for the facility to arrange is possible. </p><p num="0014"> When the facility 1 or it is the applied example which has possessed the vertical support pillar of the plural books, the RFID tag reader antenna section is arranged according to this invention, with the vertical support pillar which relates as a center. In addition, according to this invention, one or the plural RFID tag reader antenna sections to the corner inside the facility which relates or the wall of the particular facility may arrange. </p><p num="0015"> According to one technique, as for the above-mentioned RFID tag reader antenna section, for example, it can install fixed on vertical surface such as the wall or pillar. According to another technique, the antenna section may do, like the chandelier the suspension from above. </p><p num="0016"> According to this invention, softly and applicable in order to provide plural RFID tag reader antenna arrays while large size facilitating of the recent large-sized small stand facility and the like it was superior, (highly leverageable) technique is offered. This invention does not limit by designating the assembly of the above-mentioned plural RFID tag reader antenna arrays as module system, but being very convenient, such that it utilizes the vertical support pillar and the inside corner etc economically effectively it is applicable easily as wide applied example. The above-mentioned plural RFID tag reader antenna arrays, by installing in the upper part of the RFID tag where an enormous quantity which is while monitoring facility is suited, this invention has become feature of recent small stand business sometimes, but the time difficulty in the various environment which includes the dynamic Radio Frequency propagation environment where doing is can grasp the RFID tag reader antenna array which relates to simplify substantially. </p><p num="0017"> These or the other profit, detailed explanation below by the fact that sufficiently you closely examine and examine and probably becomes clearer. </p><p num="0018"> Especially adjusting to the plan, below being examined, the above-mentioned necessity is filled up at least partly due to the fact that method and the device regarding the RFID tag reader antenna array which it states in detailed explanation are offered. </p>

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<figref num="1">It is the flowchart which relates to the various execution forms of this invention. </figref><figref num="2">It is the top view which relates to the various execution forms of this invention. </figref><figref num="3">It is the top view which relates to the various execution forms of this invention. </figref><figref num="4">It is the strabismus figure which relates to the various execution forms of this invention. </figref><figref num="5">It is the top view which relates to the various execution forms of this invention. </figref><figref num="6">It is the strabismus figure which relates to the various execution forms of this invention. </figref><figref num="7">It is the outline passing flight position which relates to the various execution forms of this invention. </figref><figref num="8">It is the strabismus figure which relates to the various execution forms of this invention. </figref><figref num="9">It is the outline passing flight position which relates to the various execution forms of this invention. </figref><figref num="10">It is the passing flight position which relates to the various execution forms of this invention. </figref><figref num="11">It is the passing flight position which relates to the various execution forms of this invention.</figref>

The element in the plan is something which is shown simply and clearly, it is not always drawn with fixed reduced scale. For example, size of the element of portion in the figure and/or relative position are times when it is exaggerated vis-a-vis the other element in order to help understanding of various execution forms of this invention. In addition, being general is useful or necessary in the execution form which with respect to commerce is suited the element which has understood well often, in order not to complicate the figure of these various execution forms of this invention, illustration is abbreviated. Operation of part and/or step are times in occurrence order of specification being explained or being illustrated, but if it is this trader, really this way as for the necessity to specify it probably will understand order that it is not. Terminology and expression in this bill have the usual technical meaning of considering that this trader who belongs to the above-mentioned technical field excluding the case where the detailed meaning of differing is separately stated, matches particular terminology and expression.

From this, the plan and especially Figure 1 are referred to, conformity possible illustrate processing 100 is introduced to many of this invention.

In the step 101 of this processing 100, the plural RFID tag reader antenna sections are prepared. These antenna sections have one where respectively one RFID tag reader antenna is installed at least frame component at least. According to one technique of this invention, plural combining this kind of frame component, the antenna section which relates is formed. In this kind of case, to possess the RFID tag reader antenna which forms the 1/X angle of 360 degree RFID tag reader antenna array it is possible each frame component. Here, X is the integer which is larger than 1.

According to one technique, referring to Figure 2, as understood, X is 2. In this case, each frame component 200 has the RFID tag reader antenna which forms 1/2 angles of 360 degree RFID tag reader antenna array. The RFID tag reader antenna of 1/2, connecting mutually, physically has two frame components 200 which form the compound frame component. With example in illustration, as for frame component 200, it is constituted by the pipe 201 of the hollow square form where length differs. These pipes 201 are connected mutually (the welding and adhesive,) ideal installation mechanism such as volt/bolt, rivet and clasp (not to illustrate) by (not to illustrate). As for the pipe, for example, it is possible to make the optional is suited material make which is the ideal metal or the plastic. If it is necessary, this pipe (may possess) another form such as circular section, is not air and to be solid is possible. If it is necessary, for example this kind of frame component (, it is possible to form with appropriate formation processing) one body as the detail part.

Furthermore, it arranges in the appropriate kind of position which makes that, the RFID tag reader antenna on pipe 201 where plural antenna installation tools 202, it is selected is installed in frame component 200 easy. Also the circular territory 203 is shown as this illustrate example. As for this circular territory 203, for example, the role which accommodates the vertical support pillar is carried out. The vertical support pillar concerning details it mentions later.

According to another technique, referring to Figure 3, as understood, X is 4. In this case, each frame component 200 has the RFID tag reader antenna which forms 1/4 angles of 360 degree RFID tag reader antenna array. The RFID tag reader antenna of 1/4, connecting mutually, physically has four frame components 200 which form the compound frame component. The side of outer circle of frame component 200 respectively has become the straight line in the both of this example and the example which is shown in Figure 2. In this kind of case, the compound frame component which is obtained square and the like is rectangular. Of course, also other form is possible. According to one technique, for example, the periphery has been allowed to have curved. In this kind of case, the periphery of the compound frame component which is obtained is elliptic or circle.

Furthermore according to another technique, Figure referring to 4 and Figure 5, as understood, X is 8. In this case, each frame component 200 has the RFID tag reader antenna which forms 1/8 angles of 360 degree RFID tag reader antenna array 500. The RFID tag reader antenna of 1/8 has eight frame components 200 which are connected mutually physically. With example in illustration, volt/bolt (not to illustrate) the plural holes 401 of business, are formed to the frame component 200 which is selected. By the fact that this volt/bolt is installed in the hole 401, it is possible to lock frame component 200. By this constitution, 360 degree RFID tag reader antenna array 500 which is obtained becomes octagon.

With illustrate example of this specification, as for this kind of frame component 200 respectively, it possesses the antenna installation bracket 202 of pair. With this, it can install the single RFID tag reader antenna in specified frame component 200. Form of these brackets 202 is possible to be and appropriate adjustment may be fixed possible. In case of in each case, with specified frame component 200 bracket 202 of the specification which is utilized the antenna carries out the role which is kept in desirable specified direction.

According to this invention, frequent use it can use the RFID tag reader antenna easily. In this, for example, the phase door ray antenna is included. The phase door ray antenna usually two or the plural antennas (has the antenna in one line which when it is the similar or identical design) consists of many, makes the supply of the signal delay which is transmitted at least to one antenna of the particular antenna. Is emitted the Radio Frequency energy which coheres, concentrates on the direction of desire from this array. Furthermore, when directing the single antenna to the same direction appropriately with this, you can obtain the result which is similar. As for the phase door ray antenna, if it is necessary, in order for the phase door ray various directions to be able face to optional time, it is control possible dynamically. This kind of antenna in combination with the example which is shown in Figure 2 and Figure 3 to 360 degree RFID tag reader antenna array 500 although you use, are times when it is suitable.

Referring to Figure 6 as another example regarding these, as understood, the antenna as a flat antenna 600 in illustration is good. Because being particular technical field it is well known, here you do not detail the flat antenna. (The particular antenna is shown without the housing, but for example if it is this trader, the material which transmits Radio Frequency energy at least in general in many applied examples, (, the plastic) from with the housing which is formed electromagnetic activeness of this antenna (electromagnetically-active) what can cover the portion or everything of the component probably will understand.)

Again when Figure 1 is referred to, with step 101, the RFID tag reader antenna section, corresponding to the particular RFID tag reader antenna section, the RFID tag reader antenna and it is appointed in this illustrate example, that at least it possesses one which operation possibly is connected RFID tag reader. But (, according to this invention, is not that itself antenna section and it can also install the RFID tag reader in the other place. For example, you install the single reader, in the wall between two separate antenna sections, these two and operation are possible to connect possibly.)The RFID tag reader antenna section, has the plural frame components, therefore when, it possesses the plural RFID tag reader antennas, according to one technique, to connect with these antenna everything it is possible this RFID tag reader. Referring to Figure 7, as understood, is not limitation and as an illustration, according to this invention, to every 360 degree RFID tag reader antenna array 500 one or the plural readers (the 1st reader reader 702 of 701 - N turn eye) is possible the fact that it supports. In regard to many applied examples, for example, in every 360 degree RFID tag reader antenna array 500 making use of two RFID tag readers it is good. The plural readers, although it copes with the antenna of predetermined number, benefit (or are times when) it is necessary. In addition, at least in the applied example of part, for example the antenna, it is possible to improve efficiency when you connect to the reader where two differs alternately. For example (, the 1st antenna is connected to the 1st reader, the next 2nd antenna which it adjoins is connected to the 2nd reader, e.g., furthermore the next 3rd antenna which it adjoins is connected to the 1st reader.)

In the step 102 of illustrate processing 100, in order to make the communication processing of the RFID tag while specified facilitating easy, these plural RFID tag reader antenna sections are arranged while particular facilitating. The particular facility usually is indoor environment, but if it is desire, it is possible to adopt this invention, for also outside environment. This invention has had pliability high-level, it covers the use with the various facility. It does not limit as the example regarding these, but you can list various types and the small stand, the storage space, commercial distribution center and dispatch center and the production facility etc of size. Furthermore, with one roof, usually, it is left over in the small stand and (or) without using the wall where it extends from the floor which separates with the commodity and the commodity to the ceiling completely frequent use the generally known large-sized small stand which offers the commodity is included.

Mostly, one or the plural vertical support pillars (not to be withstand load characteristic is good on this kind of facility) is installed also the te. As suggested first, according to one technique of this invention, 360 degree RFID tag reader antenna array 500 this kind of pillar has accommodation possible central positioning opening 203. The illustrate example regarding this is shown in Figure 8. In the figure, 360 degree RFID tag reader antenna array 500 has surrounded the vertical support pillar 800 of correspondence. According to one technique, for example, as two semi- dividing bodies of 360 degree RFID tag reader antenna array 500 of this octagon condition, shown in the figure, being brought together, it encircles vertical support pillar 800, it is possible to connect mutually physically.

This invention covers various techniques in regard to installing antenna array in the installation features. Generally, it is connected by the frame, in order the particular frame for example position of desire (, as mentioned later, the position where it is higher than the plural RFID tags which do communication processing) to install, it can use the installation structure which is formed. According to one technique, as for this opening 203, the same size as vertical support pillar 800 (or barely small size) with by the fact that it does, it can keep 360 degree RFID tag reader antenna array 500 in specified position with friction fit. It is possible to vertical support pillar 800 to lock 360 degree RFID tag reader antenna array 500 according to another technique, or combining with this, (one or making use of) the ideal installation mechanism of the plural brackets and the like to the above-mentioned substituting. Furthermore the suspension it is possible to specified position to do 360 degree RFID tag reader antenna array 500 according to another technique, for example making use of laying and the like the cable over.

Generally, as for 360 degree RFID tag reader antenna array 500, it is installed in abbreviation horizontal direction in regard to many applied examples. But, it is possible to be direction of other things because it corresponds to the restriction or the opportunity of the specification which characterizes specified applied example.

Figure 8 shows the octagon condition array which is formed by eight frame components 200. Eight frame components 200 respectively have the single RFID tag reader antenna 600 of correspondence. These antennas 600 are positioned, in order to do the communication processing of the RFID tag outside particular antenna array. With this constitution, because it is arranged in the side where at least two RFID tag reader antennas abbreviate oppose of 360 degree RFID tag reader antenna array 500, in order to do the communication processing of the RFID tag from there facing toward outside, it is constituted.

According to one technique, these antennas 600 respectively share common installation inclined angle. But, according to another technique, as in illustration, it is possible to provide the portion of antenna 600, with the inclined angle which differs mutually. With example in illustration of this specification, although the 1st group 801 which consists of four antennas inside antenna 600, has abbreviation identical 1st inclined angle the 2nd group 802 which consists of remaining four antennas 600, 1st inclined angle shares the abbreviation identical inclined angle which differs. (As for the expression, abbreviation equality , +5 degree or the degree of 5, +3 it is of degree or the degree of 3, +1 the appropriate detailed difference of specification of degree or the degree of 1 etc.)

According to one technique, as for this inclined angle, it is possible to select on the basis of the height and interval of the antenna kind of section which to the whole space of goal distributes radio frequency electric power uniformly. If it is necessary, considering the distribution of radio frequency electric power, it can repeat the electric power from the reader which it adjoins. For example, in order the particular antenna, the antenna which it adjoins in order to receive the response from the tag which is located under the truth of the antenna section compared to tilt in the lower part, it is possible to set the inclined angle of the antenna for the line which ties between the antennas which it adjoins. When inclined angle is set this way, it means that the electric power which from the particular antenna is delivered on the center decreases, but at the same time electric power to this center because it is supplied by the electric power of the antenna which it adjoins to the particular antenna, sufficiently uniformity, appropriate electric power is guaranteed in the tag of this space.

With illustrate example of this specification, as for antenna 600 of 1st group 801, it is arranged in antenna 600 of 2nd group 802 and reciprocity. In regard to many applied examples, as for this, very desirable hardware requirement (field) it is possible to offer. But, this invention copes with also other various techniques in regard to these. Depending upon setting, for example, although the same inclined angle to the antenna 600 which four adjoins is made to share remaining four antennas 600 this possessing the inclined angle which differs can be beneficial. With setting of other things, in order each antenna 600 which it adjoins, to become the inclined angle where finally each one differs, can be beneficial to adjust individually.

Again when Figure 1 is referred to, with step 102 furthermore, when the above-mentioned plural RFID tag reader antenna sections, the RFID tag is arranged in the facility, in order to be arranged in the position where it is higher than expectation position of 90% RFID tag at least, the plural antenna sections are arranged. (The terminology, expectation is not approved, in order to say expectation and the presumption regarding the usual retention, memory or movement of the RFID tag where the possibility of existing appropriately in while facilitating is high, inadequacy, or it is not the case that usually always it includes the position other than.)

The height which relates can differ to every facility. When 8 feet (approximately 2.438m) or 10 feet (approximately 3.048m) height is appropriate, if it is, for example when 12 feet - 15 feet (approximately 3.658m - 4.572m) height is desirable, it is. According to this invention, and, it is possible to select the height of the loose important matter where it is possible to select the height of the important matter which is harsher than important matter description above 90%. For example, when if the antenna section should have been arranged, for example high than expectation position of 50% or 75% RFID tag, it is when and, it is appropriate for the antenna section to be arranged high than expectation position of all RFID tags which are while facilitating it is.

Referring to Figure 9, as understood, the specified facility 900 where plural RFID tags 901 are arranged, with this example has three 360 degree RFID tag reader antenna arrays 500 which are installed in the upper part of these RFID tags 901. With this example, as for these 360 degree RFID tag reader antenna arrays 500 it is installed in abbreviation same height in within everything and the facility. But, adjusting to the operational important matter or the opportunity of specification, constitution of other things is possible. Generally, as for the antenna, for the radio frequency range to be brought to the territory where particular antenna array 500 is designated as the center under antenna array 500 only position (with when in order), the possibility inclined angle being decided is high.

Regarding this example, these 360 degree RFID tag reader antenna arrays 500 are installed in the upper part of the ceiling 902 of everything and the facility. Furthermore, as for this ceiling 902, for example, it can be the generally known ceiling. In this kind of case, as for the ceiling 902 desirably, at least most, is formed from the material which transmits Radio Frequency energy at least in general.

With this illustrate example, as for 360 degree RFID tag reader antenna array 500 respectively, it is arranged the vertical support pillar 800 of correspondence for facility 900 on the center. This invention copes with also other technique of course, in regard to this. According to this invention, one which is not 360 degree array or making use of plural antenna arrays it is good. For example, it is possible to the corner inside facility 900 to install particular 90 degree array making use of 90 degree array. In addition, it is possible to the wall inside facility 900 to install particular 180 degree array as another example, making use of 180 degree array.

According to one technique, in order each one, the individual range territory to make available, to arrange it is possible these antenna arrays. But, in order for the range territory to be piled up in regard to many applied examples, in interval the above-mentioned antenna array of two or more, can be beneficial to form the compound array technique which relates. In order the ru to be piled up with for the electric power 904 which another array gives out with the electric power 903 where one array gives out the array which relates as one simple example regarding this, at least, can be useful to arrange.

This way, the pile of the range of the antenna array where two or more relates is made possible, the uselessness or furthermore or it is guaranteed, perhaps the conception that, in this trader of part it is felt squander of electric power. But, this applicant, has judged that really, it is possible to bring the fixed effect, with the technique which relates, in several applied examples. For example, as for this invention, with the RFID tag when it is adopted is many. As for the particular RFID tag, it is possible in order to support itself electrical important matter to rectify the appropriate signal from optional resource. And, this includes the signal which is received simultaneously. Taking this point into consideration, for example (, position of the RFID tag for the source antenna or because of the signal breaker) the tag which usually cannot receive sufficient electric power from the single receiver, receiving the sufficient electric power which coheres by receiving the signal from the antenna where two or more is piled up simultaneously, it is possible to operate. Furthermore, because the above-mentioned antenna array it becomes possible with this advantage, to arrange in the position where it is higher than the usual expectation position which is while facilitating as still, it is possible to clear efficiency and the operational characteristic level which are expected in regard to this.

According to one technique of this invention, referring to Figure 10, as understood, you can repeat to vertical direction the above-mentioned antenna array of two or more mutually. With illustrate example of this specification, 2nd antenna array 1002, is arranged in the upper part of 1st antenna array 1001. This time, 2nd antenna array 1002 and 1st antenna array 1001 both, is arranged the same vertical support pillar 800 on the center. In this kind of case, in order antenna for inclined angle of antenna 600 of 600 of on the one hand array and other array to differ, can be useful to set inclined angle.

Again, when Figure 1 is referred to, one or the plural RFID tag reader antenna sections are hidden in vertical direction, in the optional step 103 of this processing 100, for example (, these antenna sections that try are not visible from the person who stands on the floor of the facility of correspondence). According to one technique, as already expressed, it is possible to install the antenna section on the ceiling reverse side, (the ceiling itself has supposed that visual it is opaque). According to another technique, as shown in Figure 11, it is possible to hide the antenna section inside Radio Frequency transmitted cover 1101 of correspondence. By this constitution, sending and receiving of the Radio Frequency signal it is left over and to hide the antenna section visual it is possible cover 1101 or without disturbing completely.

The fact that it can install at the time of describing, antenna array, by using the suspension cable and the like was shown. Figure 11 shows this kind of cable 1102 of pair. According to one technique, as for these cables 1102, it is possible to possess the length of the fixing which keeps antenna array in vertical height of fixing. But, according to another technique, for example as for these cables 1102, the supply of electricity spool (, supplies electricity by the electric motor, machine mechanism, or human strength) with cooperating to be possible, to make long it is possible to make short selectively with this, according to need the length of the cable. For example, because the hand that tries reaches in the component of the antenna section making use of this technique, antenna array itself is dismantled altogether (in other things, for example, it covers and falling the antenna section selectively easily 1101 and the like is removed) without necessity, it is possible to make the repair of the antenna section easy.

If it is this trader, in order to understand, if the above-mentioned execution form does not deviate from the mind or the range of this invention, various correction, modification and combination are possible, particular correction, modification and combination should interpret that it is inside the range of concept of this invention.