201225419 六、發明說明： 【發明所屬之技術領域】 本發明係關於一種多頻段天線及多頻段RFID讀取裝 置，詳而言之’係關於一種使單一機器以分時多工方式讀 取LF、HF及UHF頻段下的RFID標籤的多頻段天線及多 頻段RFID讀取裝置。 【先前技術】 隨著無線辨識系統射頻辨識（Radio Frequency 鲁Identification ; RFID)蓬勃發展，而因應使用需求以及 RFID技術的發展而有低頻（Low Frequency ;簡稱LF )、 高頻（High Frequency ;簡稱 HF)及超高頻（Ultra High Frequency;簡稱UHF)等頻段推出，且各頻段都有其特性 及用處’主要是取決於各頻段所採用的天線、其工作頻率 及其作用距離’例如可供使用者近距離使用LF或HF的 RFID卡片，遠距離使用的UHF的RFID卡片。 鲁為減少成本及使用者攜帶RFID卡片的負擔，現已推 行出LF及HF的雙頻段RFID卡片或是LF、HF以及UHF 的三頻段RFID卡片，即便已有三頻段RFID卡，卻未有三 頻段RFID讀取器問市，而該三頻段R]FID卡片内的各三頻 段天線需與符合各該天線工作特性的RFID讀取器搭配使 用，因此，以致於造成二頻段RFID卡片的使用者在面對 設置於眼前的多個RF1D讀取器時，往往不知道應以那一 個RFID讀取器對該三頻段rfid卡片進行讀取。 前述三頻段RFID讀取器無法問市的原因在於，由於 111844 3 201225419 UHF天線的輻射元件，其例如為平板天線，而lf及hF 天線疋由綠圈組合而成，而前述線圈又對uhf天線組成要 件中的反射板形成干擾作用 ，因而使前述三頻段RFID讀 取器無法發揮LF、HF以及UHF天線各自的讀取功能。 【發明内容】 雲於上述習知技術之缺點，本發明之目的在於提供一 種多頻段天線及多頻段RFID讀取裝置，避免該UHF天線 之反射板受到LF天線或HF天線之線圈的干擾，致使造成 無法發揮UHF頻段下可遠距離讀取信號的問題。 為達到上述目的以及其它目的，本發明提供一種多頻 段天線，其包括：LF天線，其具備第一線圈；Hf天線， 其具備第二線圈；以及UHF天線，具有輻射元件及反射 板’而該LF天線、HF天線及UHF天線係整合於rfid讀 取裝置中。 本發明之多頻段天線另一實施例，其包括：LF天線， 具有第一線圈；HF天線，具有第二線圈；UHF天線，具 有輻射元件，固定座，設置於金屬層板上，該固定座用以 承載該LF天線、HF天線及輻射元件，且以該金屬層板作 為UHF天線的反射板，而該LF天線、HF天線及UHF天 線係整合於RFID讀取裝置中。 前述多頻段天線中’該LF天線、HF天線及該輻射元 件係利用高介電係數材料佈局而呈同一平面設置。 前述多頻段天線中’該LF天線及HF天線係與該輕 射元件間隔設置。 4 111844 201225419 剛述多頻段天線中，該第一線圈及第二線圈係外覆有 吸波材料。 再者’本發明還提供一種多頻段RFID讀取裝置，該 RFID讀取裴置包括：複數RFm晶片，分別與前述LF天 線、HF天線及UHF天線連接；感測單元，用以於預定距 離内感測是否有外物進入；以及控制單元，用以持續驅動 與前述UHF天線連接的RFID晶片執行RFID標箴讀取功 月巨’在接收到該感測單元感測到有外物進入時，才驅動與 •刖述LF天線及HF天線連接的rFID晶片執行RFID標籤 項取功能，否則與前述LF天線及HF天線連接的RFID晶 片均處於閒置狀態。 相車父於習知技術，本發明之多頻段天線及多頻段 RFID讀取裝置除可克服UHF天線之反射板易受到lf天 線或HF天線之線圈的干擾而無法發揮UHF頻段下可遠距 離讀取信號的問題外，更可在單一機器下以一種分時多工 #方式讀取不_段下的RFID標籤；此外，係在感測單元 感測到有外物接近時，才驅動與前述LF天線及hf天線連 =RFID晶片執行RFm標籤讀取功能，因此本發明兼具 喊月匕的效果。再者，由於該第一線圈及第二線圈可外覆吸 波材料’或者該LF天線、HF天線及該韓射元件係利用高 介電係數材料佈局而呈同一平面設置，故可縮短該金屬層 板（或反射板）與該第—線圈及第二線圈間的間距，因此， 本發明之多頻段天線及多頻段RFID讀取裝置，在縮小天 線整體工間下’亦可兼顧各不同頻段下的RFID標籤讀取 111844 5 201225419 … 效果。 【實施方式】 以下係藉由特定的具體實施例說明本發明之技術内 容，熟悉此技術之人士可由本說明書所揭示之内容輕易地 了解本發明之其他優點與功效。本發明亦可藉由其他不门 的具體實施例加以施行或應用。本說明書中的各項細節亦 可基於不同觀點與應用，在不悖離本發明之精神下，進行 各種修飾與變更。 第1圖所示為本發明之多頻段天線之一實施例的立體 圖，本實施例之多頻段天線1包括：LF天線10、hf天線 11及UHF天線12。而該LF天線1 〇、HF天線11及uhf 天線12係整合於RFID讀取裝置中，以使該rFID讀取裝 置具有LF、HF及UHF三頻段的信號讀取功能。201225419 VI. Description of the Invention: [Technical Field] The present invention relates to a multi-band antenna and a multi-band RFID reading device, which is described in detail with respect to a method for reading a LF in a time-multiplexed manner by a single machine. Multi-band antenna and multi-band RFID reader for RFID tags in the HF and UHF bands. [Prior Art] With the rapid development of radio frequency identification (Radio Frequency Identification; RFID), low frequency (LF) and high frequency (HF) are used in response to the demand and the development of RFID technology. And UHF (UHF) and other frequency bands are introduced, and each frequency band has its characteristics and use 'mainly depends on the antenna used in each frequency band, its working frequency and its working distance', for example, available Use RFID cards with LF or HF at close range and UHF RFID cards for long distance use. In order to reduce the cost and burden of carrying RFID cards, Lu has introduced dual-band RFID cards for LF and HF or three-band RFID cards for LF, HF and UHF. Even if there are three-band RFID cards, there is no tri-band RFID. The reader asks the market, and the three-band antennas in the three-band R]FID card need to be used together with the RFID readers that match the working characteristics of the antennas, so that the user of the two-band RFID card is present. For a plurality of RF1D readers placed in front of the eyes, it is often not known which RFID reader should be used to read the three-band RFID card. The reason why the aforementioned three-band RFID reader cannot be asked is because the radiating element of the 111844 3 201225419 UHF antenna is, for example, a panel antenna, and the lf and hF antennas are combined by a green circle, and the aforementioned coil is connected to the uhf antenna. The reflecting plates in the constituent elements form an interference effect, so that the aforementioned three-band RFID reader cannot perform the reading function of each of the LF, HF, and UHF antennas. SUMMARY OF THE INVENTION Clouds are disadvantages of the above-mentioned prior art, and an object of the present invention is to provide a multi-band antenna and a multi-band RFID reading device, which prevent the reflector of the UHF antenna from being interfered by the coil of the LF antenna or the HF antenna, resulting in interference The problem of being able to read signals at a long distance in the UHF band cannot be achieved. To achieve the above and other objects, the present invention provides a multi-band antenna comprising: an LF antenna having a first coil; an Hf antenna having a second coil; and a UHF antenna having a radiating element and a reflector' The LF antenna, HF antenna and UHF antenna system are integrated in the rfid reading device. Another embodiment of the multi-band antenna of the present invention includes: an LF antenna having a first coil; an HF antenna having a second coil; and a UHF antenna having a radiating element, a fixing base disposed on the metal layer board, and the fixing base The LF antenna, the HF antenna, and the radiating element are used, and the metal layer board is used as a reflector of the UHF antenna, and the LF antenna, the HF antenna, and the UHF antenna are integrated in the RFID reading device. In the multi-band antenna, the LF antenna, the HF antenna, and the radiating element are disposed in the same plane by using a high-k material layout. In the multi-band antenna, the LF antenna and the HF antenna are spaced apart from the light-emitting element. 4 111844 201225419 In the multi-band antenna just described, the first coil and the second coil are covered with an absorbing material. Furthermore, the present invention also provides a multi-band RFID reading device, the RFID reading device comprising: a plurality of RFm chips respectively connected to the LF antenna, the HF antenna and the UHF antenna; and a sensing unit for using within a predetermined distance Sensing whether there is foreign matter entering; and a control unit for continuously driving the RFID chip connected to the UHF antenna to perform an RFID tag reading function, when receiving the sensing unit to sense the entry of foreign objects, The rFID chip connected to the LF antenna and the HF antenna is driven to perform the RFID tag item fetching function, otherwise the RFID chip connected to the LF antenna and the HF antenna is idle. According to the conventional technology, the multi-band antenna and the multi-band RFID reading device of the present invention can overcome the UHF antenna's reflection plate and can be interfered by the coil of the lf antenna or the HF antenna, and cannot be used for long-distance reading in the UHF band. In addition to the problem of taking signals, it is also possible to read the RFID tags under the non-segment in a single machine under a single machine; in addition, when the sensing unit senses that there is a foreign object approaching, the driver and the foregoing are driven. The LF antenna and the hf antenna connection = the RFID chip performs the RFm tag reading function, and therefore the present invention has the effect of screaming. Furthermore, since the first coil and the second coil can be covered with the absorbing material 'or the LF antenna, the HF antenna, and the Korean ray element are arranged in the same plane by using a high-k material layout, the metal can be shortened. The spacing between the layer (or the reflector) and the first coil and the second coil. Therefore, the multi-band antenna and the multi-band RFID reading device of the present invention can also take into account different frequency bands under the overall reduction of the antenna. The next RFID tag reads 111844 5 201225419 ... effect. [Embodiment] The technical contents of the present invention are described below by way of specific embodiments, and those skilled in the art can easily understand other advantages and effects of the present invention from the contents disclosed in the present specification. The invention may also be practiced or applied by other specific embodiments. The details of the present specification can also be modified and changed without departing from the spirit and scope of the invention. 1 is a perspective view showing an embodiment of a multi-band antenna of the present invention. The multi-band antenna 1 of the present embodiment includes an LF antenna 10, an hf antenna 11, and a UHF antenna 12. The LF antenna 1 〇, HF antenna 11 and uhf antenna 12 are integrated in the RFID reading device so that the rFID reading device has a signal reading function of three frequency bands of LF, HF and UHF.
該LF天線10具有第一線圈1〇〇，該第一線圈1〇〇繞 設於第一輻射金屬環1〇1上；該HF天線11具有第二線圈 110，該第二線圈110繞設於第二輻射金屬環111上；該 UHF天線12具有輻射元件120及反射板121，該UHF天 線 12 係為圓極化天線（circular polar panel antenna)、平 板天線、螺旋天線、偶極天線或開槽式天線，該反射板121 為金屬材料所製成，且該輻射元件120、第一線圈100及 第二線圈110係設置於該反射板121的同一側，且該反射 板121與該第一線圈1〇〇及第二線圈110呈一預定間隔設 置，於一具體實施例中，前述預定間隔可為5公分’藉由 此間隔即可克服UHF天線之反射板易受到LF天線或HF 6 111844 201225419 天，之線圈的干擾而無料揮腳下可遠 信號的問題。 買取 f此須提出說明的是’上述各天線另亦有信號饋入點 接地點等構件’由於此些構件均為—般天線必配標準， 因此以下將不對其用途及構造作進—步詳細之說明 顯示與本發明相關之部分。 為降低整體天線高度以達到小型化的目的， 避免該UHF夭給1 1 c 61 ί 天線12之反射板121受到LF天線10之第— 線圈1〇〇以及該HF天線u之第二線圈ιι〇的干擾，故 發明更可於該第一線圈100及第二線圈11〇外覆吸波材料 13，藉此克服在縮短該反射板121與該第一線圈丨㈨及第 -線圈110間的間隔而無法發揮U H F頻段下可遠距 信號的問題。 貫取 再者，除如第1圖所示將該LF天線1〇&HF天線11 與該UHF天線12隔開設置外，該LF天線1〇之第 1 ΟΠ ^ TUt? hf天線u之第二線圈11()亦可設置於uhf 12之輕射元彳12〇上，換言之，可省去設置前述的第—輕 射金屬環1G1以及第二輻射金屬環ln以及設於該咖 天線12之輻射元件12〇上的第一支撐柱14〇;或者，僅該 LF天線10之第一線圈1〇〇*HF天線u之第二線圈 設置於該咖天線12之輻射元件⑽上，而另一線圈仍 可藉由該第一支撐柱14〇與該輻射元件12〇間隔設置。 再者，為更為縮小天線整體體積同時仍可確保UHF 頻段下可遠距離讀取信號的效果，亦可於該UHp天線土 2 111844 7 201225419 之反射板121朝輻射元件120、第一線圈100及第二線圈 110的面上設置吸波材料，且因該反射板121設置有吸波 材料，故亦可縮短設置於該輻射元件120及反射板121間 第二支撐柱141的長度，甚至省略該第二支撐柱141的設 置。 更甚者，為較前述結構更為縮小天線整體體積並可兼 具在不同頻段下的信號讀取效果，本發明之多頻段天線除 如第1圖所示的結構外’還可將該LF天線、HF天線及該 輻射兀件120利用高介電係數材料佈局而呈同一平面設 i ^m數材料使不同頻段的各天線不受彼此 間的信號干擾而影響其信m讀取功能。 此》外，為爭兔@ t ‘” ’’、、&小天線整體體積並可兼具在不同頻段 讀取效果’除以前述該第一線圈及第二線圈係外 ，有u材料天線、HF天線及該輻射元件係利用 高介電係數材料佈局而呈同-平面設置外，還可透過控制 :莫、1»(士圖示）以時間差方式控制各天線以不同的時間進 4丁‘唬凟取’藉由錯開各天線的讀取時間使各天線不受彼 此間的信號干擾而影響μ號讀取功能。 ’如第2圖所示，係用以顯示本發明之多頻段天 線另實__視圖。為簡化說明，以下僅就與本實施 U 1圖不同處提出說明，本實施例之多頻段天線2之 UHF天線不具有μ述的反純⑵，且本實施例之多頻段 天線2括ms座2()’該固定座如係裝設於金屬層板3 i &具體而S ’該金屬層板3例如鐵門，甚至可為設置 8 111844 201225419 於壁面上以紹或鐵等金屬製成的板材，藉由該固定座2〇 以固定該LF天線10、HF天線11及輻射元件120,，且以 該金屬層板3作為UHF天線12的反射板。 再者，可藉由該固定座20之固定柱200來增加LF天 線10及HF天線11與金屬層板3間的間距，然，亦可省 略該固定柱200的設置。 接著，如第3圖係為本發明之多頻段RFID讀取裝置 之基本架構方塊圖，該多頻段RFID讀取裝置4用以讀取 馨 LF、HF及UHF頻段下的RFID標籤，且該多頻段Rfid 讀取裝置4可透過USB等傳輸介面與資料處理裝置5電性 連接，該資料處理裝置5可為進行物流控管、門禁管理、 人員出缺勤記錄或交通費扣款的電腦設備，該多頻段Rfid 讀取裝置4包括：複數天線40、複數RFID晶片41、感測 單元42及控制單元43。 該複數天線40例如為前述第1圖或第2圖之多頻段 φ 天線中的LF天線、HF天線及UHF天線。 該複數RFID晶片41分別與前述LF天線、HF天線 及UHF天線各別連接。 該感測單元42用以於預定距離内感測是否有外物進 入0 該控制單元43用以持續驅動與前述UHF天線連接的 RFID晶片執行RFID標籤讀取功能；在接收到該感測單元 42感測到有外物進入時，才會驅動與前述LF天線及HF 天線連接的RFID晶片執行rfid標籤讀取功能，否則與前 111844 9 201225419 … 述LF天線及HF天線連接的RHD晶片處於閒置狀態該 閒置狀態係指未供電給與前述LF天線及HF天線連接的 RFID曰曰片。具體而言，負責長距離讀取rfid標蕺的rfid 晶片獲付電源供應而可持續具冑RFID標籤讀取功能，而 負責短距離讀取RFID標籤的RFID晶片在一般情況下，是 不被供電的’直到感測單元42感測到於一預設距離内有外 物接近’才對負責短距離讀取RFID標籤的RFId晶片進行 供電，以使其執行RFID標籤讀取功能。 舉例而言’以通關閘門為例，現有通關閘門會設置兩 個不同頻段的RFID讀取裝置來進行近端以及遠端的RFn) 標籤讀取作業’前述近端讀取係用以讀取進出該通關閘門 的特定人員’例如具有權限者的關務人員，而遠端讀取係 用以續取欲進出口的貨櫃，以判斷該貨櫃的資訊。而本發 明之多頻段rfid讀取裝置即是單一機器提供近端以及遠 端的讀取處理’且為節省用電量，本發明僅對負責長距離 讀取RFID標籤的RFID晶片持續提供電力，至於負責短距 離讀取RFID標籤的RFI.D晶片，是在感測到有外物接近 時，方對其進行供電，承前例子所述，負責短距離讀取RFID 標籤的RFID晶片只有在關務人員執行業務前需將其身份 識別用的RFID卡片供該晶片讀取，/般情況下’該負責 短距離讀取RFID標籤的RFID晶片是不需運作的，基於 此，本發明即加入感測單元42來針對近端讀取的用電進行 有效的管理，β達節能的效果。 綜上所述，本發明之多頻段天線及多頻段RFID讀取 10 111844 201225419 裝置將UHF天線之反射板與LF天線或HF天線之線圈以 預定間隔設置，避免該反射板受到線圈的干擾，而使RFID 讀取裝置具備多頻段的信號讀取功能；此外，本發明之多 頻段天線及多頻段RFID讀取裝置還可在克服前述反射板 易受到線圈干擾的問題下兼顧天線體積小型化的特性；再 者，更可在單一機器下以一種分時多工方式讀取不同頻段 下的RFID標籤。 上述實施例僅例示性說明本發明之原理及功效，而非 • 用於限制本發明。任何熟習此項技術之人士均可在不違背 本發明之精神及範疇下，對上述實施例進行修飾與改變。 因此，本發明之權利保護範圍，應如後述之申請專利範圍 所列。 【圖式簡單說明】 第1圖係為本發明之多頻段天線之一實施例的立體 圖， φ 第2圖係為本發明之多頻段天線之另一實施例的側視 圖；以及 第3圖為本發明之多頻段RFID讀取裝置之基本架構 方塊圖。 【主要元件符號說明】 1,2 多頻段天線 10 LF天線 100 第一線圈 101 第一輻射金屬環 11 111844 201225419 11 HF天線 110 第二線圈 111 第二輻射金屬環 12 UHF天線 120,1205 輻射元件 121 反射板 13 吸波材料 140 第一支撐柱 141 第二支撐柱 20 固定座 200 固定柱 3 金屬層板 4 多頻段RFID讀取裝置 40 天線 41 RFID晶片 42 感測單元 43 控制單元 5 資料處理裝置The LF antenna 10 has a first coil 1〇〇 wound around a first radiating metal ring 1〇1; the HF antenna 11 has a second coil 110, and the second coil 110 is wound around The second radiating metal ring 111; the UHF antenna 12 has a radiating element 120 and a reflecting plate 121, and the UHF antenna 12 is a circular polar panel antenna, a planar antenna, a helical antenna, a dipole antenna or a slotted The reflector 121 is made of a metal material, and the radiating element 120, the first coil 100 and the second coil 110 are disposed on the same side of the reflector 121, and the reflector 121 and the first coil The first coil and the second coil 110 are disposed at a predetermined interval. In a specific embodiment, the predetermined interval may be 5 cm. By this interval, the reflector of the UHF antenna can be overcome by the LF antenna or the HF antenna. HF 6 111844 201225419 Days, the interference of the coils and the problem of far-reaching signals. Buying f This must be stated that 'the above antennas also have the signal feeding point grounding point and other components'. Because these components are all standard antennas, the following will not be used for their use and structure. The description shows portions relevant to the present invention. In order to reduce the overall antenna height for miniaturization, the UHF 避免 1 1 c 61 ί antenna 12 reflector 121 is protected by the first coil 1 of the LF antenna 10 and the second coil ι of the HF antenna u. The invention can further cover the first coil 100 and the second coil 11 〇 to cover the absorbing material 13 , thereby overcoming the shortening of the interval between the reflector 121 and the first coil 九 (9) and the first coil 110 . It is impossible to play the problem of long-distance signals in the UHF band. Further, in addition to the LF antenna 1〇&HF antenna 11 and the UHF antenna 12 as shown in Fig. 1, the first ΟΠ ^ TUt? hf antenna u of the LF antenna 1〇 The second coil 11 () can also be disposed on the light beam 彳 12 u of the uhf 12, in other words, the aforementioned first light metal ring 1G1 and the second radiant metal ring ln can be omitted and the coffee antenna 12 can be disposed. The first support post 14〇 on the radiating element 12〇; or only the second coil of the first coil 1〇〇*HF antenna u of the LF antenna 10 is disposed on the radiating element (10) of the coffee antenna 12, and the other The coil can still be spaced apart from the radiating element 12 by the first support post 14A. Furthermore, in order to further reduce the overall size of the antenna while still ensuring the long-distance read signal in the UHF band, the reflector 121 of the UHp antenna earth 2 111844 7 201225419 can also be directed toward the radiating element 120 and the first coil 100. The absorbing material is disposed on the surface of the second coil 110, and since the absorbing material is disposed on the reflecting plate 121, the length of the second supporting column 141 disposed between the radiating element 120 and the reflecting plate 121 can be shortened, or even omitted. The arrangement of the second support column 141. Moreover, in order to reduce the overall volume of the antenna and the signal reading effect in different frequency bands compared with the foregoing structure, the multi-band antenna of the present invention can also be used in addition to the structure shown in FIG. The antenna, the HF antenna and the radiating element 120 are arranged in the same plane by using a high-k material material layout, so that the antennas of different frequency bands are not interfered with each other by the signal interference, thereby affecting the function of reading the signal. In addition to this, for the rabbit @t '" '',, & small antenna overall volume and can read in different frequency bands' divided by the first coil and the second coil system, there is a u material antenna The HF antenna and the radiating element are arranged in the same plane by using a high-k material layout, and can also be controlled by a control method: Mo, 1» (sho) to control each antenna in a time difference manner to enter a different time. 'Capture' affects the μ number reading function by staggering the reading time of each antenna so that the antennas are not interfered with each other. 'As shown in Fig. 2, it is used to display the multi-band antenna of the present invention. In order to simplify the description, the following description is only different from the U 1 diagram of the present embodiment. The UHF antenna of the multi-band antenna 2 of the present embodiment does not have the inverse (2) of the description, and the present embodiment has many The frequency band antenna 2 includes a m-seat 2 () 'the fixed seat is installed on the metal laminate 3 i & specifically, the metal layer 3 such as an iron gate, or even the setting of 8 111844 201225419 on the wall Or a plate made of metal such as iron, by means of the fixing seat 2〇 to fix the LF day 10. The HF antenna 11 and the radiating element 120, and the metal layer plate 3 is used as a reflecting plate of the UHF antenna 12. Further, the LF antenna 10 and the HF antenna 11 can be added by the fixing post 200 of the fixing base 20. The spacing between the metal laminates 3, of course, may also omit the arrangement of the fixed pillars 200. Next, as shown in Fig. 3 is a block diagram of the basic architecture of the multi-band RFID reading device of the present invention, the multi-band RFID reading device 4, the RFID tag in the LF, HF, and UHF bands is read, and the multi-band Rfid reading device 4 can be electrically connected to the data processing device 5 through a transmission interface such as USB. The data processing device 5 can be used for logistics. The multi-band Rfid reading device 4 includes: a plurality of antennas 40, a plurality of RFID chips 41, a sensing unit 42 and a control unit 43. The plurality of antennas are included in the control device, the access control management, the personnel absence record or the transportation fee deduction. 40 is, for example, an LF antenna, an HF antenna, and a UHF antenna in the multi-band φ antenna of the first or second aspect. The complex RFID chip 41 is connected to each of the LF antenna, the HF antenna, and the UHF antenna, respectively. Unit 42 is used for a predetermined distance Detecting whether or not a foreign object enters the 0. The control unit 43 is configured to continuously drive the RFID chip connected to the UHF antenna to perform an RFID tag reading function; and when the sensing unit 42 receives the foreign object entering, it is driven. The RFID chip connected to the LF antenna and the HF antenna performs the rfid tag reading function, otherwise the RHD chip connected to the LF antenna and the HF antenna is in an idle state, and the idle state means that the LF antenna is not supplied to the LF antenna. And an RFID chip connected to the HF antenna. Specifically, the rfid chip, which is responsible for long-distance reading of the rfid standard, is supplied with a power supply and can continue to have the RFID tag reading function, and the RFID chip responsible for short-distance reading of the RFID tag is not normally powered. Until the sensing unit 42 senses that there is a foreign object approaching within a predetermined distance, the RFId chip responsible for short-distance reading of the RFID tag is powered to perform the RFID tag reading function. For example, in the case of a customs gate, the existing customs gate will be equipped with two different frequency band RFID reading devices for near-end and far-end RFn) tag reading operations. The aforementioned near-end reading system is used to read in and out. The specific person of the customs gate is, for example, a customs officer with authority, and the remote reading system is used to renew the container to be imported or exported to determine the information of the container. The multi-band rfid reading device of the present invention is a single machine providing near-end and far-end reading processing' and in order to save power consumption, the present invention continuously supplies power only to the RFID chip responsible for long-distance reading of the RFID tag. As for the RFI.D chip, which is responsible for short-distance reading of RFID tags, it is powered when it senses the proximity of foreign objects. As mentioned in the previous example, the RFID chip responsible for short-distance reading of RFID tags is only in the customs. Before the person performs the business, the RFID card for identification is required to be read by the chip. In general, the RFID chip responsible for short-distance reading of the RFID tag does not need to be operated. Based on this, the present invention adds sensing. The unit 42 is effective for the power consumption of the near-end reading, and the β achieves the effect of energy saving. In summary, the multi-band antenna and multi-band RFID reading 10 111844 201225419 device of the present invention sets the reflector of the UHF antenna and the coil of the LF antenna or the HF antenna at a predetermined interval to prevent the reflector from being interfered by the coil. The RFID reading device is provided with a multi-band signal reading function; in addition, the multi-band antenna and the multi-band RFID reading device of the present invention can also overcome the problem of miniaturization of the antenna volume while overcoming the problem that the reflecting plate is susceptible to coil interference. Furthermore, RFID tags in different frequency bands can be read in a time-multiplexed manner under a single machine. The above-described embodiments are merely illustrative of the principles and effects of the invention, and are not intended to limit the invention. Modifications and variations of the above-described embodiments can be made by those skilled in the art without departing from the spirit and scope of the invention. Therefore, the scope of protection of the present invention should be as set forth in the appended claims. BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view showing an embodiment of a multi-band antenna of the present invention, and FIG. 2 is a side view showing another embodiment of the multi-band antenna of the present invention; and FIG. A block diagram of the basic architecture of the multi-band RFID reading device of the present invention. [Main component symbol description] 1, 2 multi-band antenna 10 LF antenna 100 first coil 101 first radiating metal ring 11 111844 201225419 11 HF antenna 110 second coil 111 second radiating metal ring 12 UHF antenna 120, 1205 radiating element 121 Reflecting plate 13 Absorbing material 140 First support column 141 Second support column 20 Fixing block 200 Fixing post 3 Metal layer plate 4 Multi-band RFID reading device 40 Antenna 41 RFID chip 42 Sensing unit 43 Control unit 5 Data processing device
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