CN104241820B - PIFA with Archimedes spiral EBG structure used as floor board - Google Patents
PIFA with Archimedes spiral EBG structure used as floor board Download PDFInfo
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- CN104241820B CN104241820B CN201410409814.0A CN201410409814A CN104241820B CN 104241820 B CN104241820 B CN 104241820B CN 201410409814 A CN201410409814 A CN 201410409814A CN 104241820 B CN104241820 B CN 104241820B
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- radiation fin
- left end
- archimedes
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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 25
- 230000005855 radiation Effects 0.000 claims abstract description 50
- 239000004020 conductor Substances 0.000 claims abstract description 31
- 238000007373 indentation Methods 0.000 claims description 25
- 238000004891 communication Methods 0.000 abstract description 2
- 230000000694 effects Effects 0.000 description 6
- 239000000203 mixture Substances 0.000 description 5
- 238000010586 diagram Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 235000019988 mead Nutrition 0.000 description 2
- 238000010295 mobile communication Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000011229 interlayer Substances 0.000 description 1
- 239000010410 layer Substances 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000001465 metallisation Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000003786 synthesis reaction Methods 0.000 description 1
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Abstract
The invention relates to a PIFA, in particular to a PIFA with an Archimedes spiral EBG structure used as a floor board. The PIFA with the Archimedes spiral EBG structure used as the floor board solves the problems that an existing PIFA is low in radiant efficiency and large in overall size. The PIFA with the Archimedes spiral EBG structure used as the floor board comprises a radiation sheet, a short circuit plate, the floor board, a coaxial inner conductor and a coaxial outer conductor; the radiation sheet and the floor board are sequentially arranged side by side in parallel from top to bottom; the tip of the left end of the radiation sheet is connected with the tip of the left end of the floor board through the short circuit plate; the coaxial outer conductor is vertically arranged below the left end of the floor board, and the upper end of the coaxial outer conductor is connected with the lower surface of the left end of the floor board; the coaxial inner conductor is vertically arranged between the radiation sheet and the floor board, and the upper end of the coaxial inner conductor is connected with the lower surface of the left end of the radiation sheet. The PIFA with the Archimedes spiral EBG structure used as the floor board is applied to the field of wireless communication.
Description
Technical field
The present invention relates to a kind of PIFA antennas, and in particular to a kind of with spiral of Archimedes EBG structures as floor
PIFA antennas, belong to wireless communication field.
Background technology
Radio frequency identification based on cell phone platform is combined using RFID reader with the mobile phone as mobile communication terminal, with
RFID technique is means, by the new technology of mobile communications network platform quick obtaining information.PIFA antennas since the generation, because
For its size is smaller, pcb board can be made full use of as ground plane, and by ground strip by resonance length lock pin be a quarter
Wavelength, is always the principal mode of built-in aerial.Frequency band gap characteristic specific to EGB (electro-magnetic bandgap) structure so that it makees
It is a kind of new manual electromagnetic structure, is had a very wide range of applications in the frequency range of microwave and millimeter wave, wherein conduct
The reflecting plate of antenna is significantly applied in terms of antenna radiation efficiency is improved.But, and due to EBG structures itself intrinsic week
The characteristics of phase property, when causing it to want the electrical characteristics for reaching target, often with very big size, meeting increase largely
System bulk, thus very big restriction is subject in the synthesis with IC system.
The content of the invention
The present invention is relatively low for the existing PIFA antenna radiation efficiencies of solution, the larger problem of antenna overall volume, and then proposes
A kind of PIFA antennas with spiral of Archimedes EBG structures as floor.
The present invention is adopted the technical scheme that to solve the above problems：The present invention includes radiation fin, short board, floor, same
Axle inner wire and coaxial outer conductor, from top to bottom side by side parallel is set successively for radiation fin, floor, and the end of radiation fin left end passes through
Short board is connected with the end of floor left end, and coaxial outer conductor is vertically arranged in the lower section of floor left end, and coaxial outer conductor
Upper end is connected with the lower surface of floor left end, and coaxial inner conductor is vertically arranged between radiation fin and floor, and coaxial inner conductor
Upper end be connected with the lower surface of radiation fin left end, the lower end of coaxial inner conductor is inserted into coaxially through the upper surface of floor left end
In outer conductor, radiation fin and floor are rectangle plate body, and radiation fin is provided with the first rectangular indentation in the middle part of one side long, radiation
Two the second rectangular indentations, and two the second rectangular indentations are provided with another side long of piece positioned at the both sides of the first rectangular indentation,
The first strip connected in star, and each the first strip connected in star center line along its length and ground are provided with the middle part of floor upper surface
Plate center line along its length overlaps, and multiple second strip connected in stars is provided with the upper surface on floor, each second strip
Centerline parallel of the groove center line along its length with floor in the width direction, the first strip connected in star and multiple second
The upper surface on floor is divided into multiple cells by strip connected in star, and an Archimedes spiral is equipped with each described cell
Groove, the center of each Archimedes spiral groove is provided with through hole.
The beneficial effects of the invention are as follows：Resonance band of the invention is 0.78G~0.99GHz, and frequency bandwidth is
0.21GHz, centre frequency is 0.89GHz.And resonance band is surveyed for 0.76G~1.05GHz, frequency bandwidth is 0.29GHz, in
Frequency of heart is 0.91GHz.In spite of certain frequency shift (FS), but the present invention is used for hyper band radio frequency reader, is still full
Sufficient design requirement, cover 0.92G~0.925GHz.Antenna measurement gain is 3.13dB, than conventional planar inverse-F antenna
2.57dB increased 0.56dB, it is seen that the use on EBG floors can effectively suppress surface wave and the backward radiation of antenna, improve
The radiance of antenna.The XOY faces directional diagram of antenna is tested in microwave dark room, and EBG structures are loaded with no
The directional diagram of conventional planar inverse-F antenna contrasted, be loaded with the backward spoke of the planar inverted-F antenna of screw type EBG structures
Reduction is penetrated, main lobe becomes big, and main radiation direction is more protruded, so the PIFA antenna directivities for being loaded with EBG structures are more preferable.
Brief description of the drawings
Fig. 1 is front view of the invention, and Fig. 2 is the top view of radiation fin, and Fig. 3 is the top view on floor, and Fig. 4 is A Ji meter
Moral screw type EBG-PIFA's | S11| result, Fig. 5 is spiral EBG-PIFA and traditional PI FA directional diagrams.
Specific embodiment
Specific embodiment one：Present embodiment is illustrated with reference to Fig. 1 to Fig. 5, one kind is with A Ji meter described in present embodiment
Moral helix EBG structures include radiation fin 1, short board 2, floor 3, coaxial inner conductor 4 and coaxial outer for the PIFA antennas on floor
Conductor 5, from top to bottom side by side parallel is set successively for radiation fin 1, floor 3, and the end of the left end of radiation fin 1 is by short board 2 and ground
The end connection of the left end of plate 3, coaxial outer conductor 5 is vertically arranged in the lower section of the left end of floor 3, and the upper end of coaxial outer conductor 5 with
The lower surface connection of the left end of floor 3, coaxial inner conductor 4 is vertically arranged between radiation fin 1 and floor 3, and coaxial inner conductor 4
Upper end is connected with the lower surface of the left end of radiation fin 1, and the lower end of coaxial inner conductor 4 is inserted into together through the upper surface of the left end of floor 3
In axle outer conductor 5, radiation fin 1 and floor 3 are rectangle plate body, the first rectangle is provided with the middle part of 1 one sides long of radiation fin and is lacked
Mouthful 1-1, is provided with two the second rectangular indentation 1-2 on another side long of radiation fin 1, and two the second rectangular indentation 1-2 are located at the
The both sides of one rectangular indentation 1-1, are provided with the first strip connected in star 3-1 in the middle part of the upper surface of floor 3, and each first strip is recessed
Center line of the groove 3-1 center lines along its length with floor 3 along its length is overlapped, and multiple is provided with the upper surface on floor 3
Second strip connected in star 3-2, each the second strip connected in star 3-2 center line along its length with floor 3 in the width direction
Centerline parallel, the upper surface on floor 3 is divided into multiple by the first strip connected in star 3-1 with multiple second strip connected in star 3-2
Cell, is equipped with an Archimedes spiral groove 3-3, each Archimedes spiral groove 3-1 in each described cell
Center be provided with through hole.
The standard polar equation of Archimedes spiral groove 3-3 is in present embodiment：R (θ)=a+b (θ), in formula：b
It is spiral of Archimedes coefficient, unit is mm/ °, represents increase (or reduction) amount of polar diameter when often rotating 1 degree；θ is polar angle,
Unit is degree, represents total number of degrees that spiral of Archimedes is turned over；A is the polar diameter when θ=0 °, and unit mm changes parameter a and incites somebody to action
Change spiral shape, b control spiral shell wire spacings.Floor 3 is micro-strip form, using printed circuit board technology, Archimedian screw
Line is processed using spill, and upper metal layers thickness is 0.1mm, and interlayer thickness degree is 2mm, floor thick-ness 0.1mm.
Specific embodiment two：Present embodiment is illustrated with reference to Fig. 1 to Fig. 3, one kind is with A Ji meter described in present embodiment
Moral helix EBG structures are 40mm for the length of the radiation fin 1 of the PIFA antennas on floor, and the width of radiation fin 1 is 20mm, first
The distance between rectangular indentation 1-1 and the left end of radiation fin 1 L1 is 20mm, the second rectangular indentation 1-2 of the neighbouring left end of radiation fin 1 with
Between the left end of radiation fin 1 apart from L2 be 10mm, away between the second rectangular indentation 1-2 and the left end of radiation fin 1 of the left end of radiation fin 1
Be 30mm apart from L3, the width of the first rectangular indentation 1-1 is 9mm, and the depth of the first rectangular indentation 1-1 is 16mm, and each the
The width of two rectangular indentation 1-2 is 9mm, and the depth of each the second rectangular indentation 1-2 is 16mm.
Present embodiment has the technical effect that：It is arranged such, increased current path, increase electrical length, reduces antenna
Resonant frequency, it is ensured that in required frequency, notch depth is deepened so that the beamwidth of antenna is broadening, while meeting for antenna resonance
The mechanical strength of antenna.Other compositions and annexation are identical with specific embodiment one.
Specific embodiment three：Present embodiment is illustrated with reference to Fig. 1 to Fig. 3, one kind is with A Ji meter described in present embodiment
Moral helix EBG structures are 2mm for the width of the short board 2 of the PIFA antennas on floor, and the length of short board 2 is 10mm.
Present embodiment has the technical effect that：Be arranged such so that antenna resonance in required frequency, and notch depth compared with
It is deep.Other compositions and annexation are identical with specific embodiment one.
Specific embodiment four：Present embodiment is illustrated with reference to Fig. 1 to Fig. 3, one kind is with A Ji meter described in present embodiment
Moral helix EBG structures are 20mm for the width on the floor 3 of the PIFA antennas on floor, and the length on floor 3 is 40mm, radiation fin 1
The distance between lower surface and the upper surface of floor 3 are 10mm.
Present embodiment has the technical effect that：It is arranged such, is conducive to the energy of antenna to radiate, and reduce body as far as possible
Product.Other compositions and annexation are identical with specific embodiment one.
Specific embodiment five：Present embodiment is illustrated with reference to Fig. 1 to Fig. 3, one kind is with A Ji meter described in present embodiment
Moral helix EBG structures are for the distance between axis and the left end of floor 3 L4 of the coaxial inner conductor 4 of the PIFA antennas on floor
3mm。
Present embodiment has the technical effect that：Be arranged such so that the impedance matching of antenna is met, notch depth compared with
It is deep.Other compositions and annexation are identical with specific embodiment one.
Specific embodiment six：Present embodiment is illustrated with reference to Fig. 1 to Fig. 3, one kind is with A Ji meter described in present embodiment
Moral helix EBG structures are 0.5mm for the width of each Archimedes spiral groove 3-3 of the PIFA antennas on floor, each Ah
The width of a diameter of 0.2mm of the through hole at base Mead helical grooves 3-3 centers, the first strip connected in star 3-1 is 0.5mm, each
The width of the second strip connected in star 3-2 is 0.5mm.
Present embodiment has the technical effect that：It is arranged such, with the increase of the helix number of turns, increased the equivalent of structure
Inductance, reduces resonant frequency, has expanded bandwidth, and resonant frequency reaches 0.91G~0.93GHz, has reached need of work.Other
Composition and annexation are identical with specific embodiment one.
Operation principle
The present invention reduces resonant frequency frequency needed for by the way of helical structure increases inductance, and by changing Ah
The number of turns of base Mead helix can cause that EBG is operated in different frequency ranges, so that the use model of spiral of Archimedes
Enclose and greatly increase, the present invention is applied to hyper band, when spiral the number of turns for 4.1 circle when, resonant frequency reach 0.91G~
0.93GHz, just meets the working range of 0.92~0.925GHz of radio-frequency identification reader.Simultaneously in each helical structure
The heart all with the addition of metallization via, and its effect is so that whole EBG structures may be constructed LC shunt-resonant circuits, then make
Total resonance is on target frequency.
Claims (5)
1. a kind of PIFA antennas with spiral of Archimedes EBG structures as floor, it include 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 side by side parallel sets successively
Put, the end of radiation fin (1) left end is connected by short board (2) with the end of floor (3) left end, coaxial outer conductor (5) is vertically
The lower section of floor (3) left end is arranged on, and the upper end of coaxial outer conductor (5) is connected with the lower surface of floor (3) left end, it is coaxial interior
Conductor (4) is vertically arranged between radiation fin (1) and floor (3), and coaxial inner conductor (4) upper end and radiation fin (1) left end
Lower surface connection, the lower end of coaxial inner conductor (4) is inserted into coaxial outer conductor (5) through the upper surface of floor (3) left end,
Radiation fin (1) and floor (3) are rectangle plate body, and radiation fin is provided with the first rectangular indentation (1- in the middle part of (1) side long
1) two the second rectangular indentations (1-2), are provided with another side long of radiation fin (1), and two the second rectangular indentations (1-2) are located at
The both sides of the first rectangular indentation (1-1), are provided with the first strip connected in star (3-1) in the middle part of floor (3) upper surface, and each first
Center line of strip connected in star (3-1) center line along its length with floor (3) along its length overlaps, floor (3) it is upper
Multiple second strip connected in stars (3-2) are provided with surface, each the second strip connected in star (3-2) center line along its length is equal
With floor (3) centerline parallel in the width direction, the first strip connected in star (3-1) and multiple second strip connected in stars (3-2)
The upper surface of floor (3) is divided into multiple cells, an Archimedes spiral groove (3- is equipped with each described cell
3), the center of each Archimedes spiral groove (3-1) is provided with through hole, it is characterised in that：The length of radiation fin (1) is 40mm,
The width of radiation fin (1) is 20mm, and the distance between the first rectangular indentation (1-1) and radiation fin (1) left end (L1) are 20mm, adjacent
Distance (L2) is 10mm between second rectangular indentation (1-2) and radiation fin (1) left end of nearly radiation fin (1) left end, away from radiation
The distance between second rectangular indentation (1-2) and radiation fin (1) left end of piece (1) left end (L3) is 30mm, the first rectangular indentation
The width of (1-1) is 9mm, and the depth of the first rectangular indentation (1-1) is 16mm, and the width of each the second rectangular indentation (1-2) is
9mm, the depth of each the second rectangular indentation (1-2) is 16mm.
2. a kind of PIFA antennas with spiral of Archimedes EBG structures as floor according to claim 1, its feature exists
In：The width of short board (2) is 2mm, and the length of short board (2) is 10mm.
3. a kind of PIFA antennas with spiral of Archimedes EBG structures as floor according to claim 1, its feature exists
In：The width on floor (3) is 20mm, and the length of floor (3) is 40mm, between radiation fin (1) lower surface and floor (3) upper surface
Distance be 10mm.
4. a kind of PIFA antennas with spiral of Archimedes EBG structures as floor according to claim 1, its feature exists
In：The distance between the axis and floor (3) left end of coaxial inner conductor (4) (L4) is 3mm.
5. a kind of PIFA antennas with spiral of Archimedes EBG structures as floor according to claim 1, its feature exists
In：The width of each Archimedes spiral groove (3-3) is 0.5mm, the through hole at each Archimedes spiral groove (3-3) center
A diameter of 0.2mm, the width of the first strip connected in star (3-1) is 0.5mm, the width of each the second strip connected in star (3-2)
It is 0.5mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410409814.0A CN104241820B (en) | 2014-08-19 | 2014-08-19 | PIFA with Archimedes spiral EBG structure used as floor board |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410409814.0A CN104241820B (en) | 2014-08-19 | 2014-08-19 | PIFA with Archimedes spiral EBG structure used as floor board |
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| Publication Number | Publication Date |
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| CN104241820A CN104241820A (en) | 2014-12-24 |
| CN104241820B true CN104241820B (en) | 2017-05-24 |
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| CN201410409814.0A Expired - Fee Related CN104241820B (en) | 2014-08-19 | 2014-08-19 | PIFA with Archimedes spiral EBG structure used as floor board |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2008050441A1 (en) * | 2006-10-26 | 2008-05-02 | Panasonic Corporation | Antenna device |
| CN101605448A (en) * | 2008-06-11 | 2009-12-16 | 联发科技股份有限公司 | Screening arrangement and printed circuit board (PCB) with shielding protection |
| CN101807740A (en) * | 2009-02-13 | 2010-08-18 | 联想(北京)有限公司 | Antenna device for mobile terminal and mobile terminal |
| CN102792519A (en) * | 2010-03-08 | 2012-11-21 | 日本电气株式会社 | Structure, wiring substrate, and method for producing wiring substrate |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9407011B2 (en) * | 2012-02-22 | 2016-08-02 | The United States Of America As Represented By The Secretary Of The Army | Broadband electromagnetic band-gap (EBG) structure |
| US20130278481A1 (en) * | 2011-10-17 | 2013-10-24 | David R. Voltmer | Wideband Antenna Using Electromagnetic Bandgap Structures |
-
2014
- 2014-08-19 CN CN201410409814.0A patent/CN104241820B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2008050441A1 (en) * | 2006-10-26 | 2008-05-02 | Panasonic Corporation | Antenna device |
| CN101605448A (en) * | 2008-06-11 | 2009-12-16 | 联发科技股份有限公司 | Screening arrangement and printed circuit board (PCB) with shielding protection |
| CN101807740A (en) * | 2009-02-13 | 2010-08-18 | 联想(北京)有限公司 | Antenna device for mobile terminal and mobile terminal |
| CN102792519A (en) * | 2010-03-08 | 2012-11-21 | 日本电气株式会社 | Structure, wiring substrate, and method for producing wiring substrate |
Non-Patent Citations (1)
| Title |
|---|
| A Spiral Electromagnetic Bandgap (EBG) Structure and its Application in Microstrip Antenna Arrays;Li Yang et al;《Microwave Conference Proceedings, 2005. APMC. Asia-Pacific Conference Proceedings》;20051207;第1-4页，附图2 * |
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