CN203225345U - Miniature RFID (Radio Frequency Identification) ceramic antenna - Google Patents
Miniature RFID (Radio Frequency Identification) ceramic antenna Download PDFInfo
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- CN203225345U CN203225345U CN 201320229282 CN201320229282U CN203225345U CN 203225345 U CN203225345 U CN 203225345U CN 201320229282 CN201320229282 CN 201320229282 CN 201320229282 U CN201320229282 U CN 201320229282U CN 203225345 U CN203225345 U CN 203225345U
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Abstract
The utility model discloses a miniature RFID (Radio Frequency Identification) ceramic antenna. The antenna comprises a dielectric ceramic block (11). An upper surface of the dielectric ceramic block (11) is provided with an upper electrode face (12) as a radiation face of the antenna, and a lower surface of the dielectric ceramic block (11) is provided with a lower electrode face (13) as a grounding electrode. A short-circuit electrode (15) is arranged on a side surface of the dielectric ceramic block (11), and a feed electrode (14) is arranged on another side surface opposite the side surface where the short-circuit electrode is arranged. The feed electrode has a reverse-U-shaped coupling gap (143), which divides the feed electrode into a reverse-U-shaped part (141) and an I-shaped part (142). An upper end of the reverse-U-shaped part is electrically connected with the upper electrode face, and a lower end of the I-shaped part is electrically connected with the lower electrode face. According to the utility model, the dielectric ceramic block is made of microwave dielectric material of high dielectric constant; the reverse-U shaped part increases the length of the radiation face, such that the volume of the antenna is reduced; and the width of the short-circuit electrode can be adjusted, thereby achieving the accurate control of the frequency of the ceramic antenna.
Description
Technical field
The utility model relates to a kind of structure of antenna of electronic tag, a kind of miniature RFID ceramic antenna.
Background technology
RFID(Radio Frequency Identification) technology, claim electronic label technology, radio RF recognition technology again, it is a kind of communication technology, can identify specific objective and read and write related data by radio signals, need not to set up machinery between recognition system and the specific objective or optics contacts, function quick, batch identification can be realized, the occasion in asset managements such as IT, medical treatment, instruments can be used.Rfid system generally comprises electronic tag, read write line two parts.Electronic tag is fixed on the identified object, is used for storing the identity information of identified object.Read write line and electronic tag carry out radio communication, and data message in the label is write and reads.Antenna in the electronic tag is the critical component in the whole system, and its design and performance level are determining the performance of label to a great extent, comprise operating distance, consistency etc.The antenna of electronic tag can be divided into dipole antenna, microstrip antenna, PIFA antenna polytypes such as (Planar Inverted-F Antenna, i.e. planar inverted-F antennas), is applied to different occasions.
Sensing layers such as the development need RFID of technology of Internet of things and transducer realize that hyper band wherein is the emphasis of development.UHF RFID tag application is during to environment such as liquid, metal, and dipole antenna can't be competent at, and microstrip antenna or the PIFA antenna of pottery commonly used or plastic substrate are made label at present.When especially being applied on the micro metal assets such as instrument, IT and medical instrument, need the RFID label of miniaturization.
Summary of the invention
The utility model is intended to propose a kind of structure of miniature RFID ceramic antenna.
This miniature RFID ceramic antenna comprises the media ceramic piece of cuboid, the pole-face that powers on is arranged, as the radiating surface of antenna on the upper surface of media ceramic piece; A bottom electrode face is arranged, as grounding electrode on the lower surface of media ceramic piece; On the side of media ceramic piece a short-circuiting electrode is arranged, the upper edge of short-circuiting electrode is electrically connected with the pole-face that powers on, and the lower edge of short-circuiting electrode and bottom electrode face are electrically connected; On another side relative with the side that short-circuiting electrode is arranged a feed electrode is arranged on the media ceramic piece, an inverted U-shaped coupling slit is arranged on this feed electrode, the feed electrode is divided into inverted U-shaped part and I shape part two parts, the upper end of the inverted U-shaped part of feed electrode is electrically connected with the pole-face that powers on, and lower end and the bottom electrode face of the I shape part of feed electrode are electrically connected.
The media ceramic body of this miniature RFID ceramic antenna adopts the microwave dielectric material of high-k.Inverted U-shaped coupling slit has been equivalent to prolong the length of head-on radiation electrode (pole-face namely powers on), thereby can dwindle antenna volume.The width of the short-circuiting electrode of the RFID ceramic antenna of this miniaturization can be regulated, to reach the accurate control to the ceramic antenna frequency.
Description of drawings
Fig. 1 is the stereogram of feed electrode one side when preceding of miniature RFID ceramic antenna of the present invention;
Fig. 2 is the stereogram of short-circuiting electrode one side when preceding of miniature RFID ceramic antenna of the present invention;
Fig. 3 is the schematic diagram that chip is installed on the miniature RFID ceramic antenna.
Embodiment
As depicted in figs. 1 and 2, this miniature RFID ceramic antenna comprises the media ceramic piece 11 of cuboid, the pole-face 12 that powers on is arranged, as the radiating surface of antenna on the upper surface of media ceramic piece; A bottom electrode face 13 is arranged, as grounding electrode on the lower surface of media ceramic piece; On the side of media ceramic piece a short-circuiting electrode 15 is arranged, the upper edge of short-circuiting electrode is electrically connected with the pole-face that powers on, and the lower edge of short-circuiting electrode and bottom electrode face are electrically connected; On another side relative with the side that short-circuiting electrode 15 is arranged a feed electrode 14 is arranged on the media ceramic piece, an inverted U-shaped coupling slit 143 is arranged on the feed electrode 14, feed electrode 14 is divided into inverted U-shaped part 141 and I shape part 142 two parts, I shape partly is positioned at the recess of inverted U-shaped part, the upper end of the inverted U-shaped part 141 of feed electrode is electrically connected with the pole-face 12 that powers on, and lower end and the bottom electrode face 13 of the I shape part 142 of feed electrode are electrically connected.
The upper and lower surface of the media ceramic piece 11 of this miniature RFID ceramic antenna can be foursquare, also can be rectangular, and it is the microwave ceramic material of 120～150 high-k that the media ceramic piece can use dielectric constant.SrO-CaO-Li for example
2O – Nd
2O
3-TiO
2-Sm
2O
3Series microwave material, CaO-Li
2O-Ln
2O
3-TiO
2The series microwave material.When adopting dielectric constant greater than 120 microwave dielectric material, the length of side that can the dimensioned of the RFID ceramic antenna of hyper band (UHF) is supreme, following is less than 6mm.The pole-face that powers on of this miniature RFID ceramic antenna, bottom electrode face, short-circuiting electrode and feed electrode all can be made of the method for printing and silver ink firing.
Four electrode surfaces 12,13,14 and 15 of this miniature RFID ceramic antenna are looped around and form a loop aerial on the media ceramic body.The design in inverted U-shaped coupling slit 143 has been equivalent to prolong the length of head-on radiation electrode (pole-face 12 namely powers on), under the certain situation of the dielectric constant of dielectric material, can dwindle antenna volume, realizes the purpose of miniaturization.The design in this inverted U-shaped coupling slit 143, add the microwave dielectric ceramic materials of selecting high-k for use, can greatly dwindle the volume of this loop aerial, finally realize the miniaturization of RFID ceramic antenna, made instrument, IT assets etc. aspect applying RFID technology, possess more selection.
As (a) of Fig. 3 with (b), on the coupling slit 143 of this miniature RFID ceramic antenna can by " binding " (bonding) mode install IC chip 21, the IC chip is fixed on the bottom centre place of recess of the inverted U-shaped part 141 of feed electrode, and the input and output pin of IC chip 21 fixes with the inverted U-shaped part 141 of feed electrode and I shape part 142 respectively and is electrically connected.Be coated with in IC chip 21 positions and apply black glue 22, shown in Fig. 3 (c), chip 21 is fixed and protected, namely possessed the function of RFID label, use as a RFID label on the surface that can be applied in metal object separately.This RFID label can be attached to the surface of metal object, utilizes the surface of metal object to be used as ground plane.
Claims (2)
1. miniature RFID ceramic antenna comprises the media ceramic piece (11) of cuboid the pole-face that powers on (12) being arranged, as the radiating surface of antenna on the upper surface of media ceramic piece; A bottom electrode face (13) is arranged, as grounding electrode on the lower surface of media ceramic piece; On the side of media ceramic piece a short-circuiting electrode (15) is arranged, the upper edge of short-circuiting electrode is electrically connected with the pole-face that powers on, and the lower edge of short-circuiting electrode and bottom electrode face are electrically connected; On another side relative with the side that short-circuiting electrode (15) is arranged a feed electrode (14) is arranged on the media ceramic piece, it is characterized in that an inverted U-shaped coupling slit (143) is arranged on the described feed electrode (14), feed electrode (14) is divided into inverted U-shaped part (141) and I shape part (142), the upper end of the inverted U-shaped part of feed electrode (14) is electrically connected with the pole-face (12) that powers on, and lower end and the bottom electrode face (13) of the I shape part of feed electrode (14) are electrically connected.
2. miniature RFID ceramic antenna as claimed in claim 1 is characterized in that the upper surface of described media ceramic piece and lower surface are square, and the material of media ceramic piece is that dielectric constant is the microwave ceramics of 120～150 high-k.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320229282 CN203225345U (en) | 2013-04-28 | 2013-04-28 | Miniature RFID (Radio Frequency Identification) ceramic antenna |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320229282 CN203225345U (en) | 2013-04-28 | 2013-04-28 | Miniature RFID (Radio Frequency Identification) ceramic antenna |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203225345U true CN203225345U (en) | 2013-10-02 |
Family
ID=49252337
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201320229282 Expired - Lifetime CN203225345U (en) | 2013-04-28 | 2013-04-28 | Miniature RFID (Radio Frequency Identification) ceramic antenna |
Country Status (1)
| Country | Link |
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| CN (1) | CN203225345U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103280629A (en) * | 2013-04-28 | 2013-09-04 | 嘉兴微感电子科技有限公司 | RFID (Radio Frequency Identification) ceramic antenna, and electronic label substrate and screw type RFID label thereof |
| CN106229655A (en) * | 2016-08-30 | 2016-12-14 | 中国计量大学 | Five frequency range wearable antennas of a kind of ground spoke coupling |
| CN107817057A (en) * | 2017-11-30 | 2018-03-20 | 杭州泽济电子科技有限公司 | Fastening assembly with miniaturized electronic label |
-
2013
- 2013-04-28 CN CN 201320229282 patent/CN203225345U/en not_active Expired - Lifetime
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103280629A (en) * | 2013-04-28 | 2013-09-04 | 嘉兴微感电子科技有限公司 | RFID (Radio Frequency Identification) ceramic antenna, and electronic label substrate and screw type RFID label thereof |
| CN103280629B (en) * | 2013-04-28 | 2015-09-23 | 嘉兴微感电子科技有限公司 | RFID ceramic antenna and electronic tag matrix thereof and screw-type RFID label tag |
| CN106229655A (en) * | 2016-08-30 | 2016-12-14 | 中国计量大学 | Five frequency range wearable antennas of a kind of ground spoke coupling |
| CN106229655B (en) * | 2016-08-30 | 2023-02-28 | 中国计量大学 | A ground-radiation coupled five-band wearable antenna |
| CN107817057A (en) * | 2017-11-30 | 2018-03-20 | 杭州泽济电子科技有限公司 | Fastening assembly with miniaturized electronic label |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20131002 |
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| CX01 | Expiry of patent term |