TW201302554A - A planar loop antenna for UHF RFID tag on the plastic pallets - Google Patents
A planar loop antenna for UHF RFID tag on the plastic pallets Download PDFInfo
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- TW201302554A TW201302554A TW100123589A TW100123589A TW201302554A TW 201302554 A TW201302554 A TW 201302554A TW 100123589 A TW100123589 A TW 100123589A TW 100123589 A TW100123589 A TW 100123589A TW 201302554 A TW201302554 A TW 201302554A
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Abstract
Description
本發明係涉及一種可依附於塑膠棧板以應用於RFID UHF標籤之平面迴路天線，其操作頻寬可涵蓋UHF全球頻段，在操作頻率範圍內本發明之標籤天線具有良好的讀距場型。The present invention relates to a planar loop antenna that can be attached to a plastic pallet for use in an RFID UHF tag. The operating bandwidth can cover the UHF global frequency band, and the tag antenna of the present invention has a good read range type in the operating frequency range.
RFID為「Radio Frequency Identification」的縮寫，中文可以稱為「無線射頻辨識」，它是一種非接觸式自動識別系統，乃是利用無線電波來傳送識別資料，一組射頻辨識系統由標籤(Tag)、讀取器(Reader)及電腦資訊系統所組成。一標籤基本上是由一個傳遞電磁波訊號的天線再加上能儲存資料的矽晶片，然後以玻璃或塑膠組件封裝而成。在感應範圍內的RFID標籤藉由天線感應電磁波以產生電流，供應RFID標籤上的晶片運作並透過天線發射電磁波回覆至讀取器。以驅動能量的來源來區別，RFID標籤可分為主動式及被動式兩種：被動式的標籤本身沒有電池的裝置，所需電流全靠接收來自讀取器的無線電波以電磁感應產生，所以只有在接收到讀取器發送的訊號才會被動的回應至讀取器；而主動式的標籤內置有電池，可以主動傳送訊號供讀取器讀取，訊號傳送範圍也相對的比被動式廣。目前Tag所使用的頻段有13.56MHz、900 MHz、2.4 GHz及5.8 GHz，因此Tag植入晶片的輸入阻抗也因操作頻段不同而有所差異。短距離RFID可運用在工廠自動化、貨品銷售，長距離RFID可用在收費系統或車輛身分識別。目前應用於塑膠棧板上的Tag大多是採用體積大且較窄頻寬的天線，而本款發明之平面天線具有體積小且其阻抗寬頻可涵蓋UHF全球頻段。RFID is the abbreviation of "Radio Frequency Identification". Chinese can be called "Radio Frequency Identification". It is a non-contact automatic identification system that uses radio waves to transmit identification data. A group of RFID systems is tagged. , Reader (Reader) and computer information system. A tag is basically an antenna that transmits electromagnetic signals plus a silicon wafer that can store data, and then is packaged in glass or plastic components. The RFID tag within the sensing range senses electromagnetic waves by the antenna to generate current, supplies the wafer on the RFID tag to operate and transmits electromagnetic waves through the antenna to the reader. Different from the source of driving energy, RFID tags can be divided into active and passive types: passive tags have no battery devices themselves, and the required current is generated by electromagnetic waves receiving radio waves from the reader, so only in The signal sent by the reader will be passively responded to the reader; the active tag has a built-in battery that can actively transmit signals for reading by the reader, and the signal transmission range is relatively more passive. Currently, the frequency bands used by the tag are 13.56MHz, 900 MHz, 2.4 GHz, and 5.8 GHz. Therefore, the input impedance of the Tag implanted wafer varies depending on the operating frequency band. Short-range RFID can be used in factory automation, sales of goods, and long-distance RFID can be used in toll collection systems or vehicle identification. Most of the tags currently used on plastic pallets use large-sized and narrow-bandwidth antennas, and the planar antenna of the present invention has a small size and a wide-bandwidth impedance covering the UHF global frequency band.
我們提出一種可依附於塑膠棧板以應用於RFID UHF標籤之平面迴路天線，本發明在天線內嵌入一U形槽縫及一對寄生金屬片，以返回損失值大於等於3 dB為標準規格，頻寬範圍為837~1011 MHz(174 MHz)，可涵蓋整個UHF頻段。此一發明之平面天線結構可改善立體結構尺寸過大之缺點，並可得到一良好的讀距場型，讀取距離達2米。We propose a planar loop antenna that can be attached to a plastic pallet for RFID UHF tags. The present invention embeds a U-shaped slot and a pair of parasitic metal pieces in the antenna to return a loss value of 3 dB or more as a standard specification. The bandwidth ranges from 837 to 1011 MHz (174 MHz) and covers the entire UHF band. The planar antenna structure of the invention can improve the disadvantage of oversize of the three-dimensional structure, and can obtain a good read range type, and the reading distance is up to 2 meters.
第1圖與第2圖是本發明天線之一實施例1，包括：一饋入點1(作為晶片放置處)、一FR4玻璃纖維基板2，該介質基板設有一單面金屬平面3，該單面金屬平面包含：第一輻射金屬面10、第二輻射金屬面11、第三輻射金屬面12、第一輻射金屬面內部101、第一輻射金屬面第一末端102、第一輻射金屬面第二末端103、第一槽縫20、第二槽縫21及第三槽縫22。1 and 2 are an embodiment 1 of the antenna of the present invention, comprising: a feed point 1 (as a wafer placement), an FR4 fiberglass substrate 2, the dielectric substrate being provided with a single-sided metal plane 3, The single-sided metal plane includes: a first radiating metal surface 10, a second radiating metal surface 11, a third radiating metal surface 12, a first radiating metal surface interior 101, a first radiating metal surface first end 102, and a first radiating metal surface The second end 103, the first slot 20, the second slot 21 and the third slot 22.
第3圖是本發明天線之一實施例1的返回損失實驗量測結果圖，縱軸表示返回損失(dB)，橫軸表示操作頻率(MHz)；如第3圖所示，由所得的測試結果，以返回損失值大於等於3 dB為標準，頻寬範圍為837~1011 MHz(頻寬為174 MHz)，可涵蓋UHF全球頻段之頻寬要求。Figure 3 is a graph showing the results of the return loss experimental measurement of Embodiment 1 of the antenna of the present invention, wherein the vertical axis represents the return loss (dB) and the horizontal axis represents the operating frequency (MHz); as shown in Figure 3, the resulting test As a result, the return loss value is greater than or equal to 3 dB, and the bandwidth ranges from 837 to 1011 MHz (with a bandwidth of 174 MHz), covering the bandwidth requirements of the UHF global band.
第4圖是本發明天線之一實施例1的電阻實驗量測結果圖，縱軸表示歐姆(Ω)，橫軸表示操作頻率(MHz)；如第4圖所示，由所得的測試結果，因晶片阻抗具有實虛部阻抗的特性，本次所使用的晶片實部為17Ω，與天線進行阻抗共軛匹配。藉由嵌入一U形槽縫激發低頻共振模態及一對寄生金屬片激發高頻共振模態，兩模態結合增加操作阻抗頻寬以涵蓋UHF全球頻段，其頻寬約為174 MHz。4 is a graph showing the results of electrical resistance measurement of Embodiment 1 of the antenna of the present invention, wherein the vertical axis represents ohms (Ω) and the horizontal axis represents the operating frequency (MHz); as shown in FIG. 4, the obtained test results, Since the impedance of the wafer has the characteristics of the real imaginary part impedance, the real part of the wafer used this time is 17 Ω, and impedance conjugate matching is performed with the antenna. By embedding a U-shaped slot to excite the low frequency resonant mode and a pair of parasitic metal plates to excite the high frequency resonant mode, the two modes combine to increase the operating impedance bandwidth to cover the UHF global frequency band with a bandwidth of approximately 174 MHz.
第5圖是本發明天線之一實施例1的電抗實驗量測結果圖，縱軸表示歐姆(Ω)，橫軸表示操作頻率(MHz)；如第5圖所示，由所得的測試結果，因晶片阻抗具有實虛部阻抗的特性，本次所使用的晶片阻抗虛部為j120Ω，與天線進行阻抗共軛匹配。藉由嵌入一U形槽縫激發低頻共振模態及一對寄生金屬片激發高頻共振模態，兩模態結合增加操作阻抗頻寬以涵蓋UHF全球頻段，其頻寬約為174 MHz。Figure 5 is a graph showing the results of the reactance measurement of Embodiment 1 of the antenna of the present invention, wherein the vertical axis represents ohms (Ω), and the horizontal axis represents the operating frequency (MHz); as shown in Fig. 5, the test results obtained, Because the impedance of the wafer has the characteristics of the real imaginary part impedance, the imaginary part of the impedance of the wafer used this time is j120Ω, and impedance conjugate matching is performed with the antenna. By embedding a U-shaped slot to excite the low frequency resonant mode and a pair of parasitic metal plates to excite the high frequency resonant mode, the two modes combine to increase the operating impedance bandwidth to cover the UHF global frequency band with a bandwidth of approximately 174 MHz.
第6圖是本發明天線之一實施例1之讀距場型量測結果；其中，在X-Y Plane及X-Z Plane皆具有典型的雙向輻射之讀距場型，其讀取距離最遠可達2米。Figure 6 is a read-field type measurement result of Embodiment 1 of the antenna of the present invention; wherein, both XY Plane and XZ Plane have a typical two-way radiation read range type, and the read distance is up to 2 Meter.
綜合上述說明，本發明之一種應用於塑膠棧板之RFID UHF標籤用平面迴路天線具有寬頻操作及雙向輻射場型之特性；此外，不僅製作簡單、成本低、體積小，證明本發明天線之產業應用價值極高，足以符合發明之範疇。Based on the above description, a planar loop antenna for an RFID UHF tag applied to a plastic pallet has the characteristics of wide frequency operation and two-way radiation field type; moreover, it is not only simple to manufacture, low in cost, and small in size, and proves the industry of the antenna of the present invention. The application value is extremely high enough to meet the scope of the invention.
在上述說明中所敘述之實施例僅為說明本發明裝置之原理及其功效，而非限制本發明。本發明之權利範圍應如後述之申請專利範圍所列。The embodiments described in the above description are merely illustrative of the principles and functions of the device of the invention, and are not intended to limit the invention. The scope of the invention should be as set forth in the appended claims.
1．．．饋入點(晶片放置處)1. . . Feed point (wafer placement)
10．．．第一輻射金屬面10. . . First radiating metal surface
11．．．第二輻射金屬面11. . . Second radiating metal surface
12．．．第三輻射金屬面12. . . Third radiating metal surface
101．．．第一輻射金屬面內部101. . . First radiating metal surface interior
102．．．第一輻射金屬面第一末端102. . . First end of the first radiating metal surface
103．．．第一輻射金屬面第二末端103. . . First end of the first radiating metal surface
20．．．第一槽縫20. . . First slot
21．．．第二槽縫twenty one. . . Second slot
22．．．第三槽縫twenty two. . . Third slot
2．．．FR4玻璃纖維板基板2. . . FR4 fiberglass board
3．．．單面金屬平面3. . . Single-sided metal plane
第1圖為本發明之可依附於塑膠棧板以應用於RFID UHF標籤的平面迴路天線之一實施例結構圖(俯視圖)。1 is a structural view (top view) of an embodiment of a planar loop antenna of the present invention that can be attached to a plastic pallet for use in an RFID UHF tag.
第2圖為本發明之可依附於塑膠棧板以應用於RFID UHF標籤的平面迴路天線之一實施例結構圖(側視圖)。Figure 2 is a structural view (side view) of one embodiment of a planar loop antenna of the present invention that can be attached to a plastic pallet for use in an RFID UHF tag.
第3圖為本發明天線一實施例之返回損失實驗量測結果。Figure 3 is a graph showing the return loss experimental measurement results of an embodiment of the antenna of the present invention.
第4圖為本發明天線一實施例之電阻實驗量測結果。Fig. 4 is a graph showing the results of electrical resistance measurement of an embodiment of the antenna of the present invention.
第5圖為本發明天線一實施例之電抗實驗量測結果。Figure 5 is a graph showing the results of the electrical impedance measurement of an embodiment of the antenna of the present invention.
第6圖為本發明天線一實施例操作於900 MHz之讀距場型量測結果。Figure 6 is a measurement result of a read range field type operation of 900 MHz according to an embodiment of the antenna of the present invention.
1．．．饋入點(晶片放置處)1. . . Feed point (wafer placement)
10．．．第一輻射金屬面10. . . First radiating metal surface
11．．．第二輻射金屬面11. . . Second radiating metal surface
12．．．第三輻射金屬面12. . . Third radiating metal surface
101．．．第一輻射金屬面內部101. . . First radiating metal surface interior
102．．．第一輻射金屬面第一末端102. . . First end of the first radiating metal surface
103．．．第一輻射金屬面第二末端103. . . First end of the first radiating metal surface
20．．．第一槽縫20. . . First slot
21．．．第二槽縫twenty one. . . Second slot
22．．．第三槽縫twenty two. . . Third slot
2．．．FR4玻璃纖維板基板2. . . FR4 fiberglass board
3．．．單面金屬平面3. . . Single-sided metal plane
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| TW100123589A TWI418494B (en) | 2011-07-05 | 2011-07-05 | A planar loop antenna for uhf rfid tag on the plastic pallets |
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| TW100123589A TWI418494B (en) | 2011-07-05 | 2011-07-05 | A planar loop antenna for uhf rfid tag on the plastic pallets |
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| TW201302554A true TW201302554A (en) | 2013-01-16 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104319470A (en) * | 2014-10-16 | 2015-01-28 | 浙江大学 | Long-reading-distance RFID (Radio Frequency Identification) tag antenna easy for impedance matching |
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| CN105514591B (en) * | 2016-02-19 | 2018-05-08 | 广东中元创新科技有限公司 | Electric wire double frequency band aerial |
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| US4736207A (en) * | 1986-01-31 | 1988-04-05 | Sensormatic Electronics Corporation | Tag device and method for electronic article surveillance |
| JP4348282B2 (en) * | 2004-06-11 | 2009-10-21 | 株式会社日立製作所 | Wireless IC tag and method of manufacturing wireless IC tag |
| CN101053115B (en) * | 2004-12-14 | 2012-05-30 | 富士通株式会社 | Antenna and noncontact tag |
| JP4839257B2 (en) * | 2007-04-11 | 2011-12-21 | 株式会社日立製作所 | RFID tag |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104319470A (en) * | 2014-10-16 | 2015-01-28 | 浙江大学 | Long-reading-distance RFID (Radio Frequency Identification) tag antenna easy for impedance matching |
| CN104319470B (en) * | 2014-10-16 | 2017-06-23 | 浙江大学 | It is easy to the remote reading distance RFID label antenna of impedance matching |
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