WO2018014574A1

WO2018014574A1 - Rfid electronic antenna label provided with encapsulation part

Info

Publication number: WO2018014574A1
Application number: PCT/CN2017/077698
Authority: WO
Inventors: 周丹
Original assignee: 周丹
Priority date: 2016-07-20
Filing date: 2017-03-22
Publication date: 2018-01-25
Also published as: CN106207379A

Abstract

Disclosed is an RFID electronic antenna label provided with an encapsulation part, comprising a first dielectric plate and a second dielectric plate, both being rectangular and stacked together. The top face of the first dielectric plate is provided with a microstrip antenna. The top face of the second dielectric plate is provided with an isolating ring set. The isolating ring set is disposed between the top face of the second dielectric plate and the bottom face of the first dielectric plate. The isolating ring set comprises a first circular ring and a second circular ring arranged concentrically. An RFID chip is further comprised, wherein the RFID chip is arranged at the bottom face of the second dielectric plate and the RFID chip is electrically connected to the microstrip antenna. An RFID electronic antenna has a better electric performance and is highly practical by means of a good structure design.

Description

RFID electronic antenna tag with encapsulation section

[0001] The present invention relates to an RFID electronic antenna tag provided with a package portion.

Background technique

[0002] At present, radio frequency identification (RFID) is called RFID (Radio Frequency Identification) technology, also known as electronic label.

Radio Frequency Identification (RFID) is a communication technology that can identify a specific target by radio signals and read and write related data without identifying the mechanical or optical contact between the system and a specific target. Commonly used passive RFI D

There are low frequency (125k~134.2K), high frequency (13.56Mhz), ultra high frequency (860-960MHz). RFID tag antennas are an important part of RFID systems, and their performance will greatly affect the efficiency and quality of the entire RFID system. The main factors affecting the performance of the RFID antenna include antenna size, operating frequency band, impedance and gain. Therefore, if a better RFID antenna is needed, it should have better antenna performance.

technical problem

Problem solution

Technical solution

[0003] It is an object of the present invention to overcome the above-discussed shortcomings and to provide an RFID electronic antenna tag provided with a package portion.

[0004] In order to achieve the above object, a specific embodiment of the present invention is as follows: An RFID electronic antenna tag provided with an encapsulation portion, comprising a first dielectric plate and a second dielectric plate each being rectangular and stacked; The top surface of the board is provided with a microstrip antenna; the top surface of the second dielectric board is provided with an isolation ring group; the isolation ring group is located between the top surface of the second dielectric plate and the bottom surface of the first dielectric plate; The concentrically disposed first ring and the second ring; further comprising an RFID chip, the RFID chip being disposed on a bottom surface of the second dielectric plate, wherein the RFID chip is electrically connected to the microstrip antenna.

[0005] wherein the microstrip antenna includes a microstrip disk; the first dielectric plate is configured, and the two long sides are respectively a first side and a second side, and the two short sides are respectively a third side and Fourth side [0006] a feeding groove is disposed on a side of the microstrip disc near the first side, and a concave arm is disposed in the feeding recess

The ring arm is connected to the inner inner edge of the feeding groove, and the inner inner side of the feeding groove further has a plurality of τ-shaped rods; the first dielectric plate further comprises a feeding piece, the feeding piece and the feeding piece The arms are connected by a feeding microstrip arm

[0007] the side of the microstrip disc near the second side, the side close to the third side, and the side away from the third side are provided with groove type radiation units; each of the groove type radiation units The utility model comprises a rectangular radiation notch, a support block extending from the two side edges of the rectangular radiation notch to the middle, a cross bar extending from the support block to the middle; the groove type radiation unit further comprises a first radiation arm having a concave shape And a rectangular second radiating arm, the second radiating arm is located at a notch of the first radiating arm; the first radiating arm and the second radiating arm are respectively connected to the corresponding crossbar through the feeding rod; The inner side extends to the center of the microstrip disc with a convex depression having a convex shape, and the inner inner side of the convex depression has a circular depression extending toward the center of the microstrip disc.

[0008] wherein the center of the microstrip disc is provided with a triangular cutout, one corner of the triangular cutout is aligned with the second side, and the other two corners are respectively aligned with the third side and the fourth side.

[0009] wherein the radius of the first ring is twice the radius of the second ring.

[0010] wherein, the width of the feeding microstrip arm is N, the width of the feeding groove is K, the number of the tang rods is C, and the shell 1JK=20C*N.

[0011] wherein the number of the T-shaped bars is 2.

[0012] further comprising a package portion for packaging the first dielectric plate and the second dielectric plate, wherein the RF ID is disposed in the package portion;

[0013] wherein, the four corners of the first dielectric plate are provided with a triangular parasitic radiation sheet;

[0014] wherein, the side of the first dielectric plate adjacent to the third side is further provided with an isolation microstrip, and the side of the isolation microstrip away from the third side is provided with a sawtooth structure;

[0015] wherein, the feeding piece and the microstrip disk are provided with an isolation groove, and the isolation groove is filled with silicon dioxide.

Beneficial effect

[0016] The RFID electronic antenna has good electrical performance and high practicability through excellent structural design.

Brief description of the drawing DRAWINGS

1 is a cross-sectional view of the present invention;

2 is a plan view of a first dielectric plate of the present invention;

Figure 3 is a partial enlarged view of Figure 2;

4 is a plan view of a second dielectric plate of the present invention;

[0021] FIG. 5 is a graph of simulation and test of S11 parameters of an antenna embodiment of the present invention.

6 is a gain simulation test curve diagram and an efficiency test curve diagram of an antenna embodiment of the present invention; [0022] FIG.

7 is a normalized radiation pattern at 5 GHz of an embodiment of the antenna of the present invention.

[0024] The reference numerals in FIGS. 1 to 7 illustrate:

[0025] 1-RFID chip; 2-package portion;

[0026] vl - first dielectric plate; v2-second dielectric plate; v21 - first ring; v22 - second ring;

[0027] v3-isolated microstrip; v4-parasitic radiation sheet; v5-feeding sheet; v6-isolation groove; v7-feeding microstrip arm; v8-microstrip disk; v81-feeding groove; - ring arm; V83-T-bar; v84- lack triangular hole; v85- support block; v86- crossbar; v87- feed pole; v88- a first radiating arm; _v 89- second radiating arm;

[0028] v9-convex depression; v91-circular depression.

Embodiments of the invention

The present invention is further described in detail below with reference to the accompanying drawings and specific embodiments, which are not intended to limit the scope of the invention.

[0030] As shown in FIG. 1 to FIG. 7 , an RFID electronic antenna tag provided with an encapsulation portion according to the embodiment includes a first dielectric plate v1 and a second dielectric plate which are both rectangular and stacked together. V2; a top surface of the first dielectric plate v1 is provided with a microstrip antenna; a top surface of the second dielectric plate v2 is provided with an isolation ring group; the isolation ring group is located on a top surface of the second dielectric plate v2 and a bottom surface of the first dielectric plate v1 The isolation ring group includes two concentrically disposed first ring v21 and second ring v22; further comprising an RFID chip 1 disposed on a bottom surface of the second dielectric plate v2, the RFID The chip is electrically connected to the microstrip antenna. Through the excellent structural design, the RFID electronic antenna has good electrical performance and strong practicability.

[0031] The RFID electronic antenna tag provided with the encapsulation portion of the embodiment, the microstrip antenna includes a microstrip disk v8; the first dielectric plate v1 is set, and the two long sides thereof are respectively One side and the second side, two of them The short side is respectively a third side and a fourth side; a side of the microstrip disk v8 near the first side is provided with a feeding groove V 81, and a feeding circle v81 is provided with a concave ring arm v82. The ring arm v82 is connected to the inner inner side of the feeding groove v81, and the inner inner side of the feeding groove v81 further has a plurality of T-shaped rods V83; the first dielectric plate v1 further includes a feeding piece v5. The feeding piece v5 and the ring arm v82 are connected by the feeding microstrip arm v7; the microstrip disk v8 is close to the side of the second side, the side close to the third side, and the side away from the third side Each of the grooved radiation units includes a rectangular radiation notch, and a support block v85 extending from the two sides of the rectangular radiation notch to the middle, each support block v85 extending in the middle a cross-bar V 86; the groove-type radiating unit further includes a first radiating arm v88 having a concave shape and a second radiating arm v8 9 having a rectangular shape, the second radiating arm v89 being located at a notch of the first radiating arm v88; The first radiating arm v88 and the second radiating arm _v89 are respectively connected to the corresponding crossbar _v86 through the feeding rod _v87 ; the rectangular radiation gap The inner inner side has a convex-shaped convex recess v9 extending toward the center of the microstrip disk v8, and the inner inner side of the convex recess v9 extends toward the center of the microstrip disk v8 with a circular recess v91.

[0032] The first dielectric plate v1 and the second dielectric plate v2 are superimposed, that is, the mutual coupling effect between the isolation ring group and the microstrip antenna, and the antenna characteristics can be achieved after the coupling interference is avoided as much as possible. 5, the simulation and test of the IS11I parameters of the embodiment of the present invention are more consistent, the tested 10dB impedance bandwidth is 28.4%, and the stop band IS11I is close to zero. Referring to FIG. 6, the gain curve of the simulation and the test in the embodiment of the present invention is in agreement, the average gain in the passband is 8.2 dBi, and the roll-off edge has a high roll-off degree, and the out-of-band rejection exceeds in a wide stop band. 20dBi, better filtering effect in the range of 0~10GHz; the in-band efficiency of the embodiment of the invention is as high as 95%. Refer to Figure 7. The normalized pattern of the center frequency of 5 GHz; the maximum radiation direction is directly above the radiator, and the main polarization is greater than the cross polarization by more than 25 dBi. The pattern of other frequencies in the passband is similar to the 5GHz pattern, and the pattern in the entire passband is stable.

[0033] An RFID electronic antenna tag provided with an encapsulation portion according to the embodiment, wherein a center of the microstrip disk v8 is provided with a triangular hole v84, and an angle of the triangular hole v84 is aligned with the second side The other two corners are aligned with the third side and the fourth side, respectively. Can effectively reduce coupling interference.

[0034] In the RFID electronic antenna tag provided with the encapsulation portion, the radius of the first ring v21 is twice the radius of the second ring v22; the isolation performance is optimal, and the isolation is improved.

[0035] In the embodiment, an RFID electronic antenna tag provided with a package portion, the width of the feeding microstrip arm v7 is N, the width of the feeding groove v81 is K, and the number of the domes V83 For C, then K = 20C*N. Satisfy At the time of the formula, the average gain in the test passband can reach the level of 9.15dBi.

[0036] In the embodiment, an RFID electronic antenna tag provided with a package portion has a number of T-shaped bars V83 of 2. This number of T-shapes is optimally matched to the microstrip antenna and the standing wave ratio can be reduced to 1.15.

[0037] An RFID electronic antenna tag provided with an encapsulation portion according to the embodiment further includes an encapsulation portion 2 for packaging the first dielectric plate v1 and the second dielectric plate v2 together, wherein the RFID is disposed on Inside the package part 2; not only waterproof but also anti-corrosion.

[0038] The RFID electronic antenna tag provided with the encapsulation portion of the embodiment has a triangular parasitic radiation piece v4 at each of the four corners of the first dielectric plate v1; increasing the gain, increasing the distance, and improving the utility Sex.

[0039] In the embodiment of the present invention, an RFID electronic antenna tag is provided with an encapsulation portion. The side of the first dielectric plate v1 adjacent to the third side is further provided with an isolation microstrip v3, and the isolation microstrip v3 is away from the first One side of the three sides is provided with a sawtooth structure; it can effectively reduce the standing wave ratio and improve the antenna characteristics.

[0040] The RFID electronic antenna tag provided with the encapsulation portion is provided with an isolation groove v6 between the feeding piece v5 and the microstrip disk v8, and the isolation groove v6 is filled with two Silicon oxide; reduces return loss and improves characteristics.

[0041] The communication antenna is a non-size required antenna, and the above requirements are met as long as the hole and the hole are arranged in the bending direction; but if better stable performance is required, the specific size of the antenna can be optimized as follows: The lengths and heights of the first dielectric plate and the second dielectric plate are: 55 mm and 40 mm, respectively; the line widths of the first ring and the second ring are: lmm, and their inner circle radii are: 16 mm, 8 mm; The radius of the belt disc is: 16mm; the width of the feeding groove and the side lengths of the two sides are: 12mm and 6mm respectively; the line width of the ring arm is lmm, and the length and height of the inner frame are: 6mm and 2.5mm; The line width of the rod is 0.2mm, and the length of the rod is: 1.2mm and 0.8mm; the size of the feed piece is not limited, the total area is not more than 36 square mm; the line feeding the microstrip arm The width is lmm; reference is made to the rectangular radiation notch on the side close to the second side, the width and length are: 11.5mm and 24mm respectively; the width and height of the support block are: 2.8mm and 4.8mm respectively; the first radiation arm The width and height are: 5mm and 6mm, the size of the notch is larger than the second radiation arm, and the second radiation arm The width and height are: 2.5mm and 5.4mm respectively; the line width of the cross bar and the feed rod is 0.5mm, and the length dimension is changed according to the situation, and need not be specifically limited; the short side height and the total width of the convex depression are respectively: 3.5mm and 14.5mm; the diameter of the circular depression is: 3.5mm; the equilateral triangle of the triangle lacking hole, the side length is 3mm; the parasitic radiation piece is an isosceles triangle, the oblique side is: 4.6mm; the rectangular part of the isolated microstrip Line The width is lmm, the length is no more than 30mm, the triangle height of the isolated microstrip is lmm, and the hypotenuse is: 1.2mm. The above description is only a preferred embodiment of the present invention, and equivalent changes or modifications made to the structures, features, and principles described in the scope of the present invention are included in the scope of protection of the present patent application.

Claims

Claim

[Claim 1] An RFID electronic antenna tag provided with an encapsulation portion, comprising: a first dielectric plate (vl) and a second dielectric plate (v2) each being rectangular and stacked; the first medium The top surface of the board (vl) is provided with a microstrip antenna; the top surface of the second dielectric board (v2) is provided with an isolation ring group; the isolation ring group is located on the top surface of the second dielectric plate (v2) and the first dielectric plate (vl) The spacer ring group includes two first rings (v21) and a second ring (v22) arranged concentrically; further comprising an RFID chip (1), wherein the RFID chip (1) is disposed a bottom surface of the second dielectric plate (v2), the RFID chip is electrically connected to the microstrip antenna; and further includes a package portion for packaging the first dielectric plate (vl) and the second dielectric plate (v2) together (2 The RFID is disposed in the encapsulation portion (2), the microstrip antenna includes a microstrip disc (v8); the first dielectric plate (vl) is set, and the two long sides are respectively the first side and a second side, the two short sides are respectively a third side and a fourth side; the microstrip disc (v8) is near the first side A feeding groove (v81) is arranged on one side, a concave ring arm (v82) is arranged in the feeding groove (v81), and the ring arm (v82) is connected to the inner inner edge of the feeding groove (v81). A plurality of T-shaped bars (V83) extend from the inner side of the feeding recess (v81); the first dielectric plate (vl) further includes a feeding piece (v5), the feeding piece (v5) Connected to the ring arm (v82) via a feeding microstrip arm (v7); the microstrip disk (v8) is adjacent to a side of the second side, a side close to the third side, and a side away from the third side The side is provided with a groove type radiation unit; each of the groove type radiation units comprises a rectangular radiation notch, and a support block (v85) extending from the two sides of the rectangular radiation notch to the middle, each support block ( V85) a crossbar (v86) extending in the middle; the grooved radiating element further includes a first radiating arm (v88) having a concave shape and a second radiating arm (v89) having a rectangular shape, the second radiating arm (v89) ) at a notch of the first radiating arm (v88); the first radiating arm (v88) and the second radiating arm (v89) respectively The corresponding crossbar (v86) is connected by the feed rod (v87); the inner inner edge of the rectangular radiation notch extends to the center of the microstrip disc (v8) with a convex concave (v9), which is convex (v9) The inner side of the microstrip disc (v8) has a circular recess (v91) extending toward the center.

[Claim 2] An RFID electronic antenna tag provided with an encapsulation portion according to claim 1, characterized in that The center of the microstrip disc (v8) is provided with a triangular aperture (v84), one corner of the triangular aperture (v84) is aligned with the second side, and the other two angles are respectively aligned with the third side and the third four sides.

[Claim 3] The RFID electronic antenna tag provided with the package portion according to claim 1, wherein the radius of the first circular ring (v21) is twice the radius of the second circular ring (v22).

[Claim 4] The RFID electronic antenna tag provided with the package portion according to claim 1, wherein the feeding microstrip arm (v7) has a width N and a feeding groove (v81) The width is K, and the number of the stems (V83) is C, then K = 20C*N.

[Claim 5] The RFID electronic antenna tag provided with the package portion according to claim 1, characterized in that