CN104183915A - PIFA with I-shaped fractal EBG structure as floor - Google Patents
PIFA with I-shaped fractal EBG structure as floor Download PDFInfo
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- CN104183915A CN104183915A CN201410409826.3A CN201410409826A CN104183915A CN 104183915 A CN104183915 A CN 104183915A CN 201410409826 A CN201410409826 A CN 201410409826A CN 104183915 A CN104183915 A CN 104183915A
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- radiation sheet
- ebg structure
- pifa antenna
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- PEZNEXFPRSOYPL-UHFFFAOYSA-N (bis(trifluoroacetoxy)iodo)benzene Chemical compound FC(F)(F)C(=O)OI(OC(=O)C(F)(F)F)C1=CC=CC=C1 PEZNEXFPRSOYPL-UHFFFAOYSA-N 0.000 title claims abstract description 26
- 230000005855 radiation Effects 0.000 claims abstract description 53
- 239000004020 conductor Substances 0.000 claims abstract description 29
- 238000004891 communication Methods 0.000 abstract description 2
- 238000007373 indentation Methods 0.000 description 15
- 230000000694 effects Effects 0.000 description 7
- 238000000034 method Methods 0.000 description 7
- 238000005516 engineering process Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 238000010295 mobile communication Methods 0.000 description 2
- CKRJGDYKYQUNIM-UHFFFAOYSA-N 3-fluoro-2,2-dimethylpropanoic acid Chemical compound FCC(C)(C)C(O)=O CKRJGDYKYQUNIM-UHFFFAOYSA-N 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 230000000737 periodic effect Effects 0.000 description 1
- 238000004088 simulation Methods 0.000 description 1
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Abstract
一种以工形分形EBG结构为地板的PIFA天线，它涉及一种PIFA天线，具体涉及一种以工形分形EBG结构为地板的PIFA天线。本发明为了解决现有PIFA天线辐射效率较低，天线整体体积较大的问题。本发明包括辐射片、短路板、地板、同轴内导体和同轴外导体，辐射片、地板由上至下依次并排平行设置，辐射片左端的端部通过短路板与地板左端的端部连接，同轴外导体竖直设置在地板左端的下方。本发明用于无线通信领域。
A PIFA antenna with an I-shaped fractal EBG structure as a floor relates to a PIFA antenna, in particular to a PIFA antenna with an I-shaped fractal EBG structure as a floor. The invention aims to solve the problems of low radiation efficiency and large overall volume of the existing PIFA antenna. The invention includes a radiation sheet, a short circuit board, a floor, a coaxial inner conductor and a coaxial outer conductor, the radiation sheet and the floor are arranged side by side in parallel from top to bottom, and the left end of the radiation sheet is connected to the left end of the floor through the short circuit board , the coaxial outer conductor is arranged vertically below the left end of the floor. The invention is used in the field of wireless communication.
Description
Technical field
The present invention relates to a kind of PIFA antenna, be specifically related to a kind of PIFA antenna that the fractal EBG structure of work shape is floor of take, belong to wireless communication field.
Background technology
Radio-frequency (RF) identification based on cell phone platform is that RFID reader is combined with the mobile phone as mobile communication terminal, take RFID technology as means, by the new technology of mobile communications network platform quick obtaining information.PIFA antenna, since producing, because its size is less, can make full use of pcb board as ground plane, and by resonance length lock pin, be quarter-wave by ground strip, is the principal mode of built-in aerial always.The peculiar frequency band gap characteristic of EGB (electro-magnetic bandgap) structure, make it as a kind of novel manual electromagnetic structure, in the frequency range of microwave and millimeter wave, have a very wide range of applications, wherein as the reflecting plate of antenna, aspect raising antenna radiation efficiency, significantly applied.But, due to the intrinsic periodic feature of EBG structure self, while causing it to want to reach the electrical characteristics of target, often there is very large size again, increase system bulk that can be to a great extent, thus with integrated circuit (IC) system comprehensive in be subject to very large restriction.
Summary of the invention
The present invention is lower for solving existing PIFA antenna radiation efficiency, the problem that antenna overall volume is larger, and then a kind of PIFA antenna that the fractal EBG structure of work shape is floor of take is proposed.
The present invention addresses the above problem the technical scheme of taking to be: the present invention includes radiation fin, short board, floor, coaxial inner conductor and coaxial outer conductor, radiation fin, floor from top to bottom be arranged in parallel successively side by side, the end of radiation fin left end is connected with the end of floor left end by short board, coaxial outer conductor is vertically arranged on the below of floor left end, and the upper end of coaxial outer conductor is connected with the lower surface of floor left end, coaxial inner conductor is vertically arranged between radiation fin and floor, and the upper end of coaxial inner conductor is connected with the lower surface of radiation fin left end, the lower end of coaxial inner conductor is inserted in coaxial outer conductor through the upper surface of floor left end, radiation fin and floor are rectangle plate body, the middle part on a long limit of radiation fin has the first rectangular indentation, radiation fin has two the second rectangular indentation on another long limit, and two the second rectangular indentation are positioned at the both sides of the first rectangular indentation, the upper surface on floor two ranked first I-shaped groove along its length, the both sides of each the first I-shaped groove are respectively provided with respectively a second I-shaped groove, and the translot of each the second I-shaped groove is all communicated with the vertical slot of the first I-shaped groove, between adjacent two the first I-shaped grooves, be provided with gap, and each gap center line is along its length all parallel with the center line of floor broad ways.
Technique effect of the present invention is: the present invention uses EBG structure as the reflecting plate of PFIA antenna, to improve radiation efficiency, EBG structure adopts work shape fractal structure to realize the miniaturization of EBG structure simultaneously, to the processing of slotting of conventional P FIA antenna, the multiband radiation that realizes FPIA antenna reaches operating frequency needs.
Resonance of the present invention is at 0.82G～1.04GHz, frequency bandwidth 0.22GHz, and centre frequency is 0.93GHz.0.81G～1.05GHz with simulation result compares, and that coincide is fine, frequency bandwidth 0.24GHz, and centre frequency is also 0.93GHz.Actual measurement gain is 3.26dB, than the 2.57dB of traditional planar inverted-F antenna, has improved 0.69dB, so, to floor effectively suppressing antenna surface wave and the backward radiation really of antenna loading EBG structure, improve the gain of antenna.The backward radiation that the present invention has loaded the planar inverted-F antenna of spiral type EBG structure obviously reduces, and it is large that main lobe becomes, and main radiation direction is clearer and more definite, so loaded the antenna of EBG structure, has represented better directivity.
Accompanying drawing explanation
Fig. 1 is front view of the present invention, and Fig. 2 is the vertical view of radiation fin, and Fig. 3 is the vertical view on floor, and Fig. 4 is the fractal EBG-PIFA of work type | S
11| result schematic diagram, Fig. 5 is the fractal EBG-PIFA of work type and traditional PI FA directional diagram.
Embodiment
Embodiment one: present embodiment is described in conjunction with Fig. 1 to Fig. 5, a kind ofly described in present embodiment take the PIFA antenna that the fractal EBG structure of work shape is floor and comprise radiation fin 1, short board 2, floor 3, coaxial inner conductor 4 and coaxial outer conductor 5, radiation fin 1, floor 3 from top to bottom be arranged in parallel successively side by side, the end of radiation fin 1 left end is connected with the end of floor 3 left ends by short board 2, coaxial outer conductor 5 is vertically arranged on the below of floor 3 left ends, and the upper end of coaxial outer conductor 5 is connected with the lower surface of floor 3 left ends, coaxial inner conductor 4 is vertically arranged between radiation fin 1 and floor 3, and the upper end of coaxial inner conductor 4 is connected with the lower surface of radiation fin 1 left end, the lower end of coaxial inner conductor 4 is inserted in coaxial outer conductor 5 through the upper surface of floor 3 left ends, radiation fin 1 and floor 3 are rectangle plate body, the middle part on 1 one long limits of radiation fin has the first rectangular indentation 1-1, radiation fin has two the second rectangular indentation 1-2 on 1 another long limit, and two the second rectangular indentation 1-2 are positioned at the both sides of the first rectangular indentation 1-1, the upper surface on floor 3 two ranked first I-shaped groove 3-1 along its length, the both sides of each the first I-shaped groove 3-1 are respectively provided with respectively a second I-shaped groove 3-2, and the translot of each the second I-shaped groove 3-2 is all communicated with the vertical slot of the first I-shaped groove 3-1, between adjacent two the first I-shaped groove 3-1, be provided with gap 3-3, and each gap 3-3 center line is along its length all parallel with the center line of floor 3 broad wayss.
Embodiment two: present embodiment is described in conjunction with Fig. 1 to Fig. 3, described in present embodiment, a kind of length of radiation fin 1 of take the PIFA antenna that the fractal EBG structure of work shape is floor is 40mm, the width of radiation fin 1 is 20mm, distance L 1 between the first rectangular indentation 1-1 and radiation fin 1 left end is 20mm, between the second rectangular indentation 1-2 of contiguous radiation fin 1 left end and radiation fin 1 left end, distance L 2 is 10mm, away from the second rectangular indentation 1-2 of radiation fin 1 left end and the distance L 3 between radiation fin 1 left end, be 30mm, the width of the first rectangular indentation 1-1 is 9mm, the degree of depth of the first rectangular indentation 1-1 is 16mm, the width of each the second rectangular indentation 1-2 is 9mm, the degree of depth of each the second rectangular indentation 1-2 is 16mm.
The technique effect of present embodiment is: so arrange, increased the electric current path of flowing through, increase electrical length, guaranteed that antenna resonance is at required frequency, notch depth is darker, and is conducive to radiation, makes beamwidth of antenna broadening, has met the mechanical strength of antenna simultaneously.Other composition and annexation are identical with embodiment one.
Embodiment three: in conjunction with Fig. 1 to Fig. 3, present embodiment is described, a kind of width of short board 2 of take the PIFA antenna that the fractal EBG structure of work shape is floor is 2mm described in present embodiment, and the length of short board 2 is 10mm.
The technique effect of present embodiment is: so arrange, make antenna resonance at required frequency, and notch depth is darker.Other composition and annexation are identical with embodiment one.
Embodiment four: present embodiment is described in conjunction with Fig. 1 to Fig. 3, described in present embodiment, a kind of width of floor 3 of take the PIFA antenna that the fractal EBG structure of work shape is floor is 20mm, the length on floor 3 is 40mm, and the distance between radiation fin 1 lower surface and floor 3 upper surfaces is 10mm.
The technique effect of present embodiment is: so arrange, be conducive to increase the radiation efficiency of antenna.Other composition and annexation are identical with embodiment one.
Embodiment five: in conjunction with Fig. 1 to Fig. 3, present embodiment is described, a kind of axis of coaxial inner conductor 4 of take the PIFA antenna that the fractal EBG structure of work shape is floor and the distance L 4 between 3 left ends of floor are 3mm described in present embodiment.
The technique effect of present embodiment is: so arrange, the impedance matching of antenna is met, notch depth is increased.Other composition and annexation are identical with embodiment one.
Embodiment six: present embodiment is described in conjunction with Fig. 1 to Fig. 3, described in present embodiment, the length D1 of the translot of a kind of each the first I-shaped groove 3-1 of take the PIFA antenna that the fractal EBG structure of work shape is floor is 5mm, the width W 1 of the translot of each the first I-shaped groove 3-1 is 1mm, the length D2 of the translot of each the second I-shaped groove 3-2 is 1mm, and the width W 2 of the translot of each the second I-shaped groove 3-2 is 0.2mm.
The technique effect of present embodiment is: so arrange, increased the equivalent capacity of structure, so, make resonance frequency continue to reduce, expanded bandwidth, reached 0.78～1.27GHz, perfection has covered target frequency bands.Other composition and annexation are identical with embodiment one.
Embodiment seven: in conjunction with Fig. 1 to Fig. 3, present embodiment is described, the width of a kind of each gap 3-3 of take the PIFA antenna that the fractal EBG structure of work shape is floor is 0.2mm described in present embodiment.
The technique effect of present embodiment is: so arrange, make this EBG floor resonance frequency reach required frequency range.Other composition and annexation are identical with embodiment one.
Operation principle
In order to reduce the resonance frequency of EBG structure, by resonant frequency equation
known, need to increase electric capacity or the inductance of structure, to structure fluting, can increase electric capacity, introducing helical structure can increase inductance.The present invention's select to go into operation mode of shape groove increases electric capacity, and has carried out once fractally, makes EBG structure further reach miniaturization.
Claims (7)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201410409826.3A CN104183915A (en) | 2014-08-19 | 2014-08-19 | PIFA with I-shaped fractal EBG structure as floor |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410409826.3A CN104183915A (en) | 2014-08-19 | 2014-08-19 | PIFA with I-shaped fractal EBG structure as floor |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112768927A (en) * | 2021-01-22 | 2021-05-07 | 吉林大学 | Coaxial heating microwave antenna with H-shaped cracks and beam-collecting type microwave antenna |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2010028182A (en) * | 2008-07-15 | 2010-02-04 | Harada Ind Co Ltd | Antenna apparatus capable of suppressing inter-coupling among antenna elements |
| CN102510658A (en) * | 2011-09-26 | 2012-06-20 | 北京邮电大学 | Implementation method of H-type groove fractal UC-EBG (Uniplanar Compact Electromagnetic Band Gap) structure oriented to multifrequency antenna substrate |
| CN102834974A (en) * | 2010-04-28 | 2012-12-19 | 古河电气工业株式会社 | Plane-structured ebg |
| US8595924B2 (en) * | 2005-10-21 | 2013-12-03 | William E. McKinzie, III | Method of electromagnetic noise suppression devices using hybrid electromagnetic bandgap structures |
-
2014
- 2014-08-19 CN CN201410409826.3A patent/CN104183915A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8595924B2 (en) * | 2005-10-21 | 2013-12-03 | William E. McKinzie, III | Method of electromagnetic noise suppression devices using hybrid electromagnetic bandgap structures |
| JP2010028182A (en) * | 2008-07-15 | 2010-02-04 | Harada Ind Co Ltd | Antenna apparatus capable of suppressing inter-coupling among antenna elements |
| CN102834974A (en) * | 2010-04-28 | 2012-12-19 | 古河电气工业株式会社 | Plane-structured ebg |
| CN102510658A (en) * | 2011-09-26 | 2012-06-20 | 北京邮电大学 | Implementation method of H-type groove fractal UC-EBG (Uniplanar Compact Electromagnetic Band Gap) structure oriented to multifrequency antenna substrate |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112768927A (en) * | 2021-01-22 | 2021-05-07 | 吉林大学 | Coaxial heating microwave antenna with H-shaped cracks and beam-collecting type microwave antenna |
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Application publication date: 20141203 |