CN103956580A - UHF plane inverted-F and monopole combined antenna applied to RFID reader-writer - Google Patents
UHF plane inverted-F and monopole combined antenna applied to RFID reader-writer Download PDFInfo
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- CN103956580A CN103956580A CN201410187774.XA CN201410187774A CN103956580A CN 103956580 A CN103956580 A CN 103956580A CN 201410187774 A CN201410187774 A CN 201410187774A CN 103956580 A CN103956580 A CN 103956580A
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Abstract
Provided is a UHF plane inverted-F and monopole combined antenna applied to an RFID reader-writer. The UHF plane inverted-F and monopole combined antenna applied to the RFID reader-writer comprises a main radiation part (2) of an inverted-F antenna, a deformed radiation branch tail end part (1) of the inverted-F antenna, short circuit microstrip lines (3) of the inverted-F antenna, a feeder (5) of the antenna and a short circuit probe (4), wherein the antenna is arranged on the obverse face of a dielectric plate, and an earth plate is arranged on the reverse face of the dielectric plate. Through deformation of the radiation branch tail end part of the plane inverted-F antenna, the plane inverted-F and monopole combined antenna is formed; the radiation branch tail end part of the inverted-F antenna is divided into two paths of microstrip lines, a monopole antenna model is formed, and the far field radiation of the antenna has the characteristics of a monopole antenna; the three face surrounding technology is adopted for the earth plate of the designed antenna, and the influence on an integrated circuit from radiated electromagnetic waves is reduced. Not only is the advantage of high gains of the plane inverted-F antenna reserved, but also the advantage of good omni-directivity of the monopole antenna is achieved. The UHF plane inverted-F and monopole combined antenna applied to the RFID reader-writer is applicable to the field of UHF antennas of RFID reader-writers.
Description
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technical field
The present invention relates to a kind of uhf band plane inverse-F-monopole that is applied to rfid interrogator in conjunction with antenna, belong to microstrip antenna technical field.
background technology
REID (Radio Frequency Identification, RFID), is called for short radio frequency identification, is a kind of automatic identification technology that starts rise the nineties in 20th century.RFID can be identified specific objective and be obtained relevant data message by wireless signal, without setting up machinery or optics contacts between recognition system and specific objective, only utilize radiofrequency signal to realize contactless information transmission by Space Coupling and reach identifying purpose.The identification work of RFID does not need manual intervention, can work in various adverse circumstances, has therefore obtained researchers' extensive concern.
Antenna is as one of core component of radio communication, and its performance quality directly has influence on radio communication quality, and along with the volume of rfid interrogator constantly reduces, the size of antenna is also had higher requirement.How in reducing antenna size, to ensure its performance, be the technical main bugbear running into of present Antenna Design.
Planar inverted-F antenna structure has higher gain than other plane antenna structure, is the first-selected antenna of compact apparatus, and its shortcoming is that omni-directional is poor.And monopole antenna often has good radiation omni-directional, and it is less than normal to gain.Therefore, if can be by both advantages, just can design standard compliant miniature antenna.
summary of the invention
The object of the invention is, poor in order to solve inverse-F antenna omni-directional, the shortcoming less than normal and monopole antenna gains, structurally by both combinations, the present invention proposes a kind of uhf band deformation plane inverse-F antenna that is applied to rfid interrogator, for a kind of brand-new F-monopole is in conjunction with antenna, makes it in gain, there is down the feature of F, and in radiation characteristic, possess the omni-directional of monopole antenna simultaneously.
Realizing technical scheme of the present invention is, the designed antenna of the present invention passes through the distortion to planar inverted-F antenna radiation minor matters part, has formed plane inverse-F-monopole in conjunction with antenna; Inverse-F antenna radiation minor matters end is divided into two-way microstrip line, forms monopole antenna model, makes the far-field radiation of antenna have the feature of monopole antenna; Designed antenna ground plate portion adopts three loop techniques, the impact of the electromagnetic wave of minimizing radiation on integrated circuit.
Uhf band plane inverse-F-monopole of the present invention comprises the radiation minor matters end portion 1 after main radiant section 2, the inverse-F antenna of inverse-F antenna are out of shape, the short circuit microstrip line 3 of inverse-F antenna, feeder line part 5 and the grounding probe 4 of antenna in conjunction with antenna; Antenna is arranged on dielectric-slab front; Dielectric-slab reverse side is ground plate.
One end of the main radiant section 2 of inverse-F antenna of the present invention connects the radiation minor matters end portion 1 after inverse-F antenna distortion; The other end of the main radiant section 2 of inverse-F antenna connects respectively the feeder line part 5 of short circuit microstrip line 3 and the antenna of adjacent inverse-F antenna; Grounding probe 4 is arranged on the short circuit microstrip line 3 of inverse-F antenna, and is connected with the ground plate part of antenna reverse side.
Radiation minor matters end portion 1 after inverse-F antenna of the present invention distortion, has the design feature of monopole antenna; The main radiant section 2 of inverse-F antenna, bending place wherein adopts arc structure, plays the effect of broadening bandwidth of operation; The short circuit microstrip line 3 of inverse-F antenna, is connected 4 with grounding probe, has formed the basic structure of inverse-F antenna, and the 5th, the feeder line part of antenna, the 6th, be positioned at the circular hole at four angles of dielectric-slab, for fixed antenna position.Dash area is the dielectric-slab of designed antenna, and used herein is FR4 dielectric constant 4.4, the pcb board of thickness 0.8mm.The reverse side of dielectric-slab is the ground plate part 7 of antenna, is oblique L shaped shape, and antenna is surrounded from three directions, plays shielding action, has reduced the impact of radiation field on integrated circuit, and is connected with the short circuit microstrip line 3 of inverse-F antenna by grounding probe 4.
The invention has the beneficial effects as follows, the present invention falls F-monopole in conjunction with antenna, is out of shape by the radiation minor matters to traditional inverse-F antenna, makes it have the design feature of unit sub antenna, and then change the far-field radiation characteristic of inverse-F antenna, realize the omni-directional of general monopole antenna.Both retain the advantage of planar inverted-F antenna high-gain, realized again the good feature of monopole antenna omni-directional.
The uhf band antenna that the present invention is applicable to rfid interrogator uses.
brief description of the drawings
Fig. 1 is that the present invention falls the plane structure chart (front) of F-monopole in conjunction with antenna;
Fig. 2 is that the present invention falls the plane structure chart (reverse side) of F-monopole in conjunction with antenna;
Fig. 3 is that the present invention falls the return loss of F-monopole in conjunction with antenna;
Fig. 4 is that the present invention falls the radiation far-field region 3D figure of F-monopole in conjunction with antenna;
Picture in picture number: the 1st, the radiation minor matters end portion after inverse-F antenna distortion, has the design feature of monopole antenna; The 2nd, the main radiant section of inverse-F antenna, wherein bending place adopts arc structure, plays the effect of broadening bandwidth of operation; The 3rd, the short circuit microstrip line of inverse-F antenna; The 4th, grounding probe; The 5th, the feeder line part of antenna; The 6th, be positioned at the circular hole at four angles of dielectric-slab, for fixed antenna position; Dash area is the dielectric-slab of designed antenna, and used herein is FR4 dielectric constant 4.4, the pcb board of thickness 0.8mm; The 7th, the ground plate part of antenna.
Embodiment
The specific embodiment of the present invention as shown in the figure.
Figure 1 shows that the present invention falls F-monopole in conjunction with the plane Facad structure figure of antenna, wherein 1 is radiation minor matters end portion after inverse-F antenna distortion, has the design feature of monopole antenna; 2 is the main radiant section of inverse-F antenna, and wherein bending place adopts arc structure, plays the effect of broadening bandwidth of operation; The 3rd, the short circuit microstrip line of inverse-F antenna, with 4(grounding probe) be connected, form the basic structure of inverse-F antenna; The 5th, the feeder line part of antenna; The 6th, be positioned at the circular hole at four angles of dielectric-slab, for fixed antenna position.Dash area is the dielectric-slab of designed antenna, and used herein is FR4 dielectric constant 4.4, the pcb board of thickness 0.8mm.
Figure 2 shows that the present invention falls the plane reverse side structure chart of F-monopole in conjunction with antenna.The 7th, the ground plate part of antenna, is oblique L shaped shape, and antenna is surrounded from three directions, plays shielding action, has reduced the impact of radiation field on integrated circuit, and by 4(grounding probe) be connected with the short circuit microstrip line of inverse-F antenna.
Figure 3 shows that the present invention falls F-monopole in conjunction with the return loss of antenna, the designed antenna of the present embodiment is operated in 910MHz-926MHz frequency range, covers the uhf band of domestic conventional 920MHz, can normally work
Figure 4 shows that the present invention falls the radiation far-field region 3D figure of F-monopole in conjunction with antenna, the designed antenna of the present embodiment is by the distortion to inverse-F antenna radiation minor matters part, make its far-field region radiation 3D figure there is the feature of monopole antenna structure, made up the poor shortcoming of inverse-F antenna omni-directional.
F-the monopole of this example, in conjunction with antenna, is out of shape by the radiation minor matters to traditional inverse-F antenna, makes it have the design feature of unit sub antenna, and then changes the far-field radiation characteristic of inverse-F antenna, realizes the omni-directional of general monopole antenna.Both retain the advantage of planar inverted-F antenna high-gain, realized again the good feature of monopole antenna omni-directional.
Claims (3)
1. a uhf band plane inverse-F-monopole that is applied to rfid interrogator is in conjunction with antenna, it is characterized in that, described antenna is by being out of shape inverse-F antenna radiation minor matters part, at radiation minor matters end, microstrip line is divided into two-way, make planar inverted-F antenna there is the design feature of monopole, form and fall F-monopole in conjunction with antenna; Described antenna is arranged on the front of dielectric-slab, and the reverse side of dielectric-slab arranges ground plate part.
2. a kind of uhf band plane inverse-F-monopole that is applied to rfid interrogator according to claim 1 is in conjunction with antenna, it is characterized in that, described radiation minor matters end adopts monopole structure, make this antenna in far-field radiation characteristic, there is the feature of monopole, improved the radiation omni-directional of antenna.
3. a kind of uhf band plane inverse-F-monopole that is applied to rfid interrogator according to claim 1 is in conjunction with antenna, it is characterized in that, described ground plate part adopt three around structure, from three directions, antenna is surrounded, reduce the impact that radiated electromagnetic wave produces integrated circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410187774.XA CN103956580B (en) | 2014-05-06 | 2014-05-06 | A kind of uhf band plane inverse-F-monopole that is applied to rfid interrogator is in conjunction with antenna |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410187774.XA CN103956580B (en) | 2014-05-06 | 2014-05-06 | A kind of uhf band plane inverse-F-monopole that is applied to rfid interrogator is in conjunction with antenna |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103956580A true CN103956580A (en) | 2014-07-30 |
| CN103956580B CN103956580B (en) | 2016-05-18 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410187774.XA Expired - Fee Related CN103956580B (en) | 2014-05-06 | 2014-05-06 | A kind of uhf band plane inverse-F-monopole that is applied to rfid interrogator is in conjunction with antenna |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107887692A (en) * | 2017-10-27 | 2018-04-06 | 苏州景昱医疗器械有限公司 | The Implanted medical system of microstrip antenna and the application antenna |
| US20200321687A1 (en) * | 2017-12-21 | 2020-10-08 | Jrd Communcation (Shenzhen) Ltd. | Printed circuit board and terminal |
| WO2023071521A1 (en) * | 2021-10-29 | 2023-05-04 | Oppo广东移动通信有限公司 | Antenna assembly, middle frame assembly and electronic device |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101005291A (en) * | 2007-01-19 | 2007-07-25 | 清华大学 | Double frequency plane two antenna system for mobile terminal |
| CN101320836A (en) * | 2007-06-04 | 2008-12-10 | 明泰科技股份有限公司 | Broadband inversed F type antenna |
| CN102610911A (en) * | 2012-04-12 | 2012-07-25 | 上海祯显电子科技有限公司 | Film substrate |
-
2014
- 2014-05-06 CN CN201410187774.XA patent/CN103956580B/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101005291A (en) * | 2007-01-19 | 2007-07-25 | 清华大学 | Double frequency plane two antenna system for mobile terminal |
| CN101320836A (en) * | 2007-06-04 | 2008-12-10 | 明泰科技股份有限公司 | Broadband inversed F type antenna |
| CN102610911A (en) * | 2012-04-12 | 2012-07-25 | 上海祯显电子科技有限公司 | Film substrate |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107887692A (en) * | 2017-10-27 | 2018-04-06 | 苏州景昱医疗器械有限公司 | The Implanted medical system of microstrip antenna and the application antenna |
| US20200321687A1 (en) * | 2017-12-21 | 2020-10-08 | Jrd Communcation (Shenzhen) Ltd. | Printed circuit board and terminal |
| US11589454B2 (en) * | 2017-12-21 | 2023-02-21 | JRD Communication (Shenzhen) Ltd. | Printed circuit board and terminal |
| WO2023071521A1 (en) * | 2021-10-29 | 2023-05-04 | Oppo广东移动通信有限公司 | Antenna assembly, middle frame assembly and electronic device |
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| Publication number | Publication date |
|---|---|
| CN103956580B (en) | 2016-05-18 |
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Granted publication date: 20160518 |