CN206133631U - A high adaptability PIFA structure electronic tags - Google Patents

Abstract

The utility model provides a high adaptability PIFA structure electronic tags, a serial communication port, the label includes antenna, chip and base plate, wherein the base plate is used for holding antenna and chip, wherein the antenna matches with the chip, the antenna is including arranging metal radiation layer on the base plate upper surface, arrange the metal grounding plate on the base plate lower surface and connecting metal grounding plate and radiating element's short circuit sheet metal, and the metal radiation layer comprises feeding circuit and four monopoles, metal grounding plate set up as with the base plate equidimension, short circuit sheet metal is 4 rectangles, wherein constitutes four PIFA structures by four monopoles of radiating surface, four short circuit sheet metal and metal grounding plate. The utility model discloses high adaptability PIFA structure electronic tags can be applied to the complex electromagnetic environment of air and metal simultaneously to the bandwidth that has the broad.

Description

A high-adaptability PIFA structure electrical labels

Technical field

This utility model is related to a high-adaptability PIFA structure electrical labels, and category short-wave communication tedhnology field is suitable for Field of radio frequency identification in 800MHz～1.1GHz frequency ranges.

Background technology

Traditional logistics checking and warehousing management needs to expend substantial amounts of human resourcess and easily error, RFID Use can easily solve the above problems, use manpower and material resources sparingly and error rate be low, convenient monitoring and track.Logistics checking Be commonly encountered during warehousing management application becket border, such as RFID chip by metal cover or RFID chip and reader it Between there are metal or other conducting objects, it is therefore desirable to RFID has an anti-metal characteristic, and using when need to reach one Fixed recognition distance and recognition rate, facilitate goods checking.

Utility model content

For these problems, this utility model devises a high-adaptability PIFA (Planar Inverted-F Antennas, planar inverted-F antenna) structure electrical label, the complex electromagnetic environment of air and metal can be simultaneously applied to, and With wider bandwidth, distinguish distant, form is simple, in that context it may be convenient to solve the above problems.

Main purpose of the present utility model is to provide a high-adaptability PIFA structure electrical labels, it is intended to can answer simultaneously In metal environment and air, logistics checking and the warehousing management of complex environment are conveniently used for.

A kind of high-adaptability PIFA structure electrical labels of the present utility model, it is characterised in that the label include antenna, Chip and substrate, wherein the substrate is used to accommodate the antenna and chip, wherein the antenna is matched with chip, the antenna Including the metal radiation layer being arranged on upper surface of base plate, the metal ground plate being arranged on base lower surface and connection metal The short-circuiting jumper of earth plate and radiating element, metal radiation layer is made up of feeding circuit and four monopoles, metal ground plate It is arranged to and substrate equidimension, short-circuiting jumper is 4 rectangles, wherein by four monopoles of radiating surface, four short circuit gold Category piece and metal ground plate constitute four PIFA structures.

The antenna material includes this one kind in following material：Copper, aluminum, silver paste and electrically conductive ink.

The material of the substrate includes the one kind in following material：FR4 plastics and ceramics.

The shape of the electric feedback ring includes the one kind in following shape：Rectangle, polygon or ellipse.

Four monopoles of the radiating surface are rectangle or fold-line-shaped or polygon or ellipse, and the metal ground plate is Rectangle or polygon or ellipse, the short-circuiting jumper is rectangle or cylinder, wherein by adjusting electric feedback ring and radiating surface Antenna size is realizing antenna and chip conjugate impedance match.

The shape of the substrate is rectangle or polygon or ellipse.The size range of the substrate be long 90mm～ 110mm, wide 10mm～30mm, thickness 1mm～2mm.

In this utility model high-adaptability PIFA structure electrical labels, the metal radiation layer of antenna including upper surface of base plate, The metal ground plate and connection metal ground plate of base lower surface is constituted with the short-circuiting jumper of radiating element.Metal radiation layer It is made up of feeding circuit and four monopoles, metal ground plate is and substrate equidimension rectangular surfaces that short-circuiting jumper is 4 squares Shape, wherein constituting four PIFA structures by four monopoles of radiating surface, four short-circuiting jumpers and metal ground plate.Pass through Adjust electric feedback ring and radiating surface antenna size to realize antenna and chip conjugate impedance match, label Maximum Power Output is made, so as to enter One step reaches the purpose for extending reading/writing distance.

Description of the drawings

Fig. 1 is the metal radiation Rotating fields of high-adaptability PIFA structure electrical labels in one embodiment of the present utility model Schematic diagram.

Fig. 2 is the metal ground plate structure of high-adaptability PIFA structure electrical labels in one embodiment of the present utility model Schematic diagram.

Fig. 3 is the side short-circuiting jumper of high-adaptability PIFA structure electrical labels in one embodiment of the present utility model Structural representation.

Specific embodiment

It is described herein to be embodied as example only to explain this utility model, it is not used to limit this practicality newly Type.

With reference to Fig. 1, high-adaptability PIFA structure electricals label includes antenna 10, chip 20 and substrate 30 in the present embodiment, The rectangular setting of the substrate 30, for accommodating the antenna 10 and chip 20, wherein the antenna 10 is matched with chip 20, day Line 10 includes electric feedback ring 11, monopole 12, metal ground plate 13 and short-circuiting jumper 141,142,143,144, the feed Ring 11 is located at the middle part of the substrate 30, and the monopole 12 is provided with four symmetric arms 121,122,123,124, the symmetric arms For fold-line-shaped.The chip 20 is located on electric feedback ring.

The shape and size of substrate 30 are arranged according to specific requirement.For example in one embodiment, substrate 30 can be arranged Rectangular, its size range is long 90mm～110mm, wide 10mm～30mm, thickness 1mm～2mm.It should be pointed out that the base of rectangle Plate here is merely exemplary, in other embodiments, substrate can also be other shapes, such as ellipse etc..Substrate 30 Material can be for FR4 plastics, ceramics etc..Due to the dielectric constant and the transmission effect of thickness effect antenna 10 of the material of substrate 30 Rate, therefore the material of the material as substrate 30 of opposing insulation can be further chosen, and substrate is arranged according to the size of antenna 10 30 thickness is 1～2mm.

The profile of electric feedback ring 11 can be rectangle, polygon or ellipse etc..With reference to Fig. 1, in one embodiment, feed The profile of ring 11 is rectangle, and it is located at the middle part of substrate 30.Because the signal of antenna 10 is by four PIFA structural antennas radiation , and the design of four symmetrical PIFA structures is, in order to reach more preferable antenna pattern, therefore can to increase antenna gain.

In one embodiment can be by adjusting the size of electric feedback ring 11 and monopole antenna 121,122,123,124 come real Existing antenna 10 and the conjugate impedance match of chip 20.Conjugate impedance match referred in the case where signal source is given, antenna impedance and chip impedance Conjugation, when both are conjugated, output is maximum.The conjugate impedance match of antenna 10 and chip 20 in the present embodiment passive electronic label The impedance of antenna 10 and the impedance conjugate impedance match of chip 20 are referred to, so as to Maximum Power Output.For example can be according to institute of producer label Size and material etc., diminish or become the size or width of big ring so that the impedance of antenna 10 is total to the impedance of chip 20 Yoke, to reach the purpose of Maximum Power Output.

The material of antenna 10 can for copper, aluminum, silver paste and electrically conductive ink etc., can by etch process, depositing technology or Typography is fixedly connected with substrate 30, chip 20 both can using conducting resinl by chip to being encapsulated in electric feedback ring 11 in antenna 10 On, it is also possible to gold thread or aluminum steel jointing machine (Wire Bonder) chip 20 is bonded on electric feedback ring 11 with gold thread or aluminum steel.

In above-described embodiment, the tag size that the size of each several part can be required according to producer is configured, can when using To be affixed directly on object.

Above-mentioned antenna 10, chip 20 and substrate 30 are provided with high-adaptability PIFA structure electrical labels, can be existed Reading distance farther out and wider bandwidth are obtained in the environment of metal and in atmosphere.

Preferred embodiment of the present utility model is the foregoing is only, the scope of the claims of the present utility model is not thereby limited, The equivalent structure transformation that every utilization this utility model description and accompanying drawing content are done, or other are used in directly, indirectly Related technical field, is included in the same manner in scope of patent protection of the present utility model.

Claims (7)

1. a kind of high-adaptability PIFA structure electrical labels, it is characterised in that the label includes antenna, chip and substrate, its Described in substrate be used to accommodate the antenna and chip, wherein the antenna is matched with chip, the antenna is including being arranged in base Metal radiation layer on plate upper surface, the metal ground plate being arranged on base lower surface and connection metal ground plate and metal The short-circuiting jumper of radiating layer, metal radiation layer is made up of feeding circuit and four monopoles, metal ground plate be arranged to Substrate equidimension, short-circuiting jumper is 4 rectangles, wherein by four monopoles of radiating surface, four short-circuiting jumpers and gold Category earth plate constitutes four PIFA structures.

2. high-adaptability PIFA structure electrical labels according to claim 1, it is characterised in that the antenna material is copper Or aluminum or silver paste or electrically conductive ink.

3. high-adaptability PIFA structure electrical labels according to claim 1, it is characterised in that the material of the substrate is FR4 plastics and ceramics.

4. high-adaptability PIFA structure electrical labels according to claim 1, it is characterised in that the shape of electric feedback ring is square Shape or polygon or ellipse.

5. high-adaptability PIFA structure electrical labels according to claim 1, it is characterised in that four of the radiating surface Monopole is rectangle or fold-line-shaped or polygon or ellipse, and the metal ground plate is rectangle or polygon or ellipse, institute It is rectangle or cylinder to state short-circuiting jumper, wherein realizing antenna and chip by adjusting electric feedback ring and radiating surface antenna size Conjugate impedance match.

6. high-adaptability PIFA structure electrical labels according to claim 1, it is characterised in that the shape of the substrate is Rectangle or polygon or ellipse.

7. high-adaptability PIFA structure electrical labels according to claim 1, it is characterised in that the size model of the substrate Enclose for long 90mm～110mm, wide 10mm～30mm, thickness 1mm～2mm.