CN104241820A - PIFA with Archimedes spiral EBG structure used as floor board - Google Patents
PIFA with Archimedes spiral EBG structure used as floor board Download PDFInfo
- Publication number
- CN104241820A CN104241820A CN201410409814.0A CN201410409814A CN104241820A CN 104241820 A CN104241820 A CN 104241820A CN 201410409814 A CN201410409814 A CN 201410409814A CN 104241820 A CN104241820 A CN 104241820A
- Authority
- CN
- China
- Prior art keywords
- floor
- radiation fin
- left end
- archimedes
- spiral
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
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 antenna, be specifically related to a kind of PIFA antenna being floor with spiral of Archimedes EBG structure, 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 technique as means, by the new technology of mobile communications network platform quick obtaining information.PIFA antenna, since generation, because its size is less, can make full use of pcb board as ground plane, and is quarter-wave by ground strip by resonance length lock pin, is the principal mode of built-in aerial always.Frequency band gap characteristic specific to EGB (electro-magnetic bandgap) structure, make it as a kind of novel manual electromagnetic structure, have a very wide range of applications in the frequency range of microwave and millimeter wave, the reflecting plate wherein as antenna is significantly applied in raising antenna radiation efficiency.But, again due to the periodic feature that EBG structure self is intrinsic, when causing it to want the electrical characteristics reaching target, often there is very large size, can increase system bulk 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 entire physical volume is larger, and then proposes a kind of PIFA antenna being floor with spiral of Archimedes EBG structure.
The present invention is the technical scheme taked that solves the problem: the present invention includes radiation fin, short board, floor, coaxial inner conductor and coaxial outer conductor, radiation fin, floor is side by side parallel setting successively from top to bottom, the end of radiation fin left end is connected by the end of short board with floor left end, 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 radiation fin long limit has the first rectangular indentation, another long limit has two the second rectangular indentation to radiation fin, and two the second rectangular indentation are positioned at the both sides of the first rectangular indentation, the middle part of floor upper surface has the first strip groove, and each first strip groove center line along its length overlaps with floor center line along its length, the upper surface on floor has multiple second strip groove, each second strip groove center line along its length all with the centerline parallel of floor broad ways, the upper surface on floor is divided into multiple cell by the first strip groove and multiple second strip groove, an Archimedes spiral groove is equipped with in each described cell, the center of each Archimedes spiral groove has through hole.
The invention has the beneficial effects as follows: resonance band of the present invention is 0.78G ~ 0.99GHz, frequency bandwidth is 0.21GHz, and centre frequency is 0.89GHz.And to survey resonance band be 0.76G ~ 1.05GHz, frequency bandwidth is 0.29GHz, and centre frequency is 0.91GHz.Although there is certain frequency shift (FS), the present invention is used for hyper band radio frequency reader, remains and meets design requirement, and covers 0.92G ~ 0.925GHz.Antenna measurement gain is 3.13dB, adds 0.56dB than the 2.57dB of conventional planar inverse-F antenna, and the use on visible EBG floor can the effectively surface wave of suppressing antenna and backward radiation, improves the radiance of antenna.Test at the XOY face directional diagram of microwave dark room to antenna, and contrast with the directional diagram of the conventional planar inverse-F antenna not loading EBG structure, the backward radiation being loaded with the planar inverted-F antenna of spiral type EBG structure reduces, main lobe becomes large, main radiation direction is more outstanding, so the PIFA antenna directivity being loaded with EBG structure is better.
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 Archimedian screw type EBG-PIFA | S11| result, Fig. 5 is spiral EBG-PIFA and traditional PI FA directional diagram.
Embodiment
Embodiment one: composition graphs 1 to Fig. 5 illustrates present embodiment, described in present embodiment, a kind of PIFA antenna being floor with spiral of Archimedes EBG structure comprises radiation fin 1, short board 2, floor 3, coaxial inner conductor 4 and coaxial outer conductor 5, radiation fin 1, floor 3 is side by side parallel setting successively from top to bottom, the end of radiation fin 1 left end is connected with the end of floor 3 left end by short board 2, coaxial outer conductor 5 is vertically arranged on the below of floor 3 left end, and the upper end of coaxial outer conductor 5 is connected with the lower surface of floor 3 left end, 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 end, radiation fin 1 and floor 3 are rectangle plate body, the middle part on radiation fin 1 one long limits has the first rectangular indentation 1-1, another long limit has two the second rectangular indentation 1-2 to radiation fin 1, and two the second rectangular indentation 1-2 are positioned at the both sides of the first rectangular indentation 1-1, the middle part of floor 3 upper surface has the first strip groove 3-1, and each first strip groove 3-1 center line along its length overlaps with floor 3 center line along its length, the upper surface on floor 3 has multiple second strip groove 3-2, each second strip groove 3-2 center line along its length all with the centerline parallel of floor 3 broad ways, the upper surface on floor 3 is divided into multiple cell by the first strip groove 3-1 and multiple second strip groove 3-2, an Archimedes spiral groove 3-3 is equipped with in each described cell, the center of each Archimedes spiral groove 3-1 has through hole.
In present embodiment, the standard polar equation of Archimedes spiral groove 3-3 is: r (θ)=a+b (θ), in formula: b is spiral of Archimedes coefficient, unit is mm/ °, represents increase (or reduction) amount in footpath, pole when often rotating 1 degree; θ is polar angle, and unit is degree, represents total number of degrees that spiral of Archimedes turns over; A is the footpath, pole when θ=0 °, unit mm, and change parameter a and will change spiral shape, b controls helical spacing.Floor 3 is micro-band forms, adopts printed circuit board technology, and spiral of Archimedes adopts spill processing, and upper metal layers thickness is 0.1mm, and interlayer layer thickness is 2mm, floor thick-ness 0.1mm.
Embodiment two: composition graphs 1 to Fig. 3 illustrates present embodiment, described in present embodiment a kind of with the length of the radiation fin 1 of the spiral of Archimedes EBG structure PIFA antenna that is floor for 40mm, the width of radiation fin 1 is 20mm, distance L1 between first rectangular indentation 1-1 and radiation fin 1 left end is 20mm, contiguous second rectangular indentation 1-2 of radiation fin 1 left end and the spacing L2 of radiation fin 1 left end is 10mm, be 30mm away from the distance L3 between the second rectangular indentation 1-2 of radiation fin 1 left end and radiation fin 1 left end, 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 second rectangular indentation 1-2 is 9mm, the degree of depth of each second rectangular indentation 1-2 is 16mm.
The technique effect of present embodiment is: so arrange, and adds current path, increases electrical length, reduce the resonance frequency of antenna, ensure that antenna resonance is at required frequency, notch depth is deepened, make the beamwidth of antenna broadening, meet the mechanical strength of antenna simultaneously.Other composition and annexation identical with embodiment one.
Embodiment three: composition graphs 1 to Fig. 3 illustrates present embodiment, described in present embodiment a kind of with the width of the short board 2 of the spiral of Archimedes EBG structure PIFA antenna that is floor for 2mm, the length of short board 2 is 10mm.
The technique effect of present embodiment is: so arrange, and make antenna resonance at required frequency, and notch depth is darker.Other composition and annexation identical with embodiment one.
Embodiment four: composition graphs 1 to Fig. 3 illustrates present embodiment, described in present embodiment a kind of with the width on the floor 3 of the spiral of Archimedes EBG structure PIFA antenna that is floor for 20mm, the length on floor 3 is 40mm, and the distance between radiation fin 1 lower surface and floor 3 upper surface is 10mm.
The technique effect of present embodiment is: so arrange, and is conducive to the energy emission of antenna, and reduces volume as much as possible.Other composition and annexation identical with embodiment one.
Embodiment five: composition graphs 1 to Fig. 3 illustrates present embodiment, described in present embodiment a kind of with the distance L4 between the axis of the coaxial inner conductor 4 of the spiral of Archimedes EBG structure PIFA antenna that is floor and floor 3 left end for 3mm.
The technique effect of present embodiment is: so arrange, and the impedance matching of antenna is met, and notch depth is darker.Other composition and annexation identical with embodiment one.
Embodiment six: composition graphs 1 to Fig. 3 illustrates present embodiment, described in present embodiment a kind of with the width of each Archimedes spiral groove 3-3 of the spiral of Archimedes EBG structure PIFA antenna that is floor for 0.5mm, the diameter of the through hole at each Archimedes spiral groove 3-3 center is 0.2mm, the width of the first strip groove 3-1 is 0.5mm, my 0.5mm of the width of each second strip groove 3-2.
The technique effect of present embodiment is: so arrange, and along with the increase of the helix number of turns, add the equivalent inductance of structure, reduce resonance frequency, expanded bandwidth, resonance frequency reaches 0.91G ~ 0.93GHz, reaches need of work.Other composition and annexation identical with embodiment one.
Operation principle
The mode that the present invention adopts helical structure to increase inductance reduces resonance frequency to required frequency, and EBG can be made to be operated in different frequency ranges by the number of turns changing spiral of Archimedes, the scope of application of spiral of Archimedes is made greatly to increase like this, the present invention is applied to hyper band, when the number of turns of spiral is 4.1 circle, resonance frequency reaches 0.91G ~ 0.93GHz, just in time meets the working range of radio-frequency identification reader 0.92 ~ 0.925GHz.With the addition of metallization via hole at the center of each helical structure, its effect is, makes whole EBG structure can form LC shunt-resonant circuit, then makes total resonance on target frequency simultaneously.
Claims (6)
1. the PIFA antenna that is floor with spiral of Archimedes EBG structure, it is characterized in that: described a kind of PIFA antenna being floor with spiral of Archimedes EBG structure comprises radiation fin (1), short board (2), floor (3), coaxial inner conductor (4) and coaxial outer conductor (5), radiation fin (1), floor (3) is side by side parallel setting successively from top to bottom, the end of radiation fin (1) left end is connected with the end of floor (3) left end by short board (2), coaxial outer conductor (5) is vertically arranged on the below of floor (3) left end, and the upper end of coaxial outer conductor (5) is connected with the lower surface of floor (3) left end, 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 end, radiation fin (1) and floor (3) are rectangle plate body, the middle part on radiation fin (1) long limit has the first rectangular indentation (1-1), another long limit of radiation fin (1) has two the second rectangular indentation (1-2), and two the second rectangular indentation (1-2) are positioned at the both sides of the first rectangular indentation (1-1), the middle part of floor (3) upper surface has the first strip groove (3-1), and each first strip groove (3-1) center line along its length overlaps with floor (3) center line along its length, the upper surface on floor (3) has multiple second strip groove (3-2), each second strip groove (3-2) center line along its length all with the centerline parallel of floor (3) broad ways, the upper surface of floor (3) is divided into multiple cell by the first strip groove (3-1) and multiple second strip groove (3-2), an Archimedes spiral groove (3-3) is equipped with in each described cell, the center of each Archimedes spiral groove (3-1) has through hole.
2. a kind of PIFA antenna that is floor with spiral of Archimedes EBG structure according to claim 1, it is characterized in that: the length of radiation fin (1) is 40mm, the width of radiation fin (1) is 20mm, distance (L1) between first rectangular indentation (1-1) and radiation fin (1) left end is 20mm, contiguous second rectangular indentation (1-2) of radiation fin (1) left end is 10mm with the spacing (L2) of radiation fin (1) left end, be 30mm away from the distance (L3) between second rectangular indentation (1-2) of radiation fin (1) left end and radiation fin (1) left end, 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 second rectangular indentation (1-2) is 9mm, the degree of depth of each second rectangular indentation (1-2) is 16mm.
3. a kind of PIFA antenna that is floor with spiral of Archimedes EBG structure according to claim 1, it is characterized in that: the width of short board (2) is 2mm, the length of short board (2) is 10mm.
4. a kind of PIFA antenna that is floor with spiral of Archimedes EBG structure according to claim 1, it is characterized in that: the width of floor (3) is 20mm, the length on floor (3) is 40mm, and the distance between radiation fin (1) lower surface and floor (3) upper surface is 10mm.
5. a kind of PIFA antenna that is floor with spiral of Archimedes EBG structure according to claim 1, is characterized in that: the distance (L4) between the axis of coaxial inner conductor (4) and floor (3) left end is 3mm.
6. a kind of PIFA antenna that is floor with spiral of Archimedes EBG structure according to claim 1, it is characterized in that: the width of each Archimedes spiral groove (3-3) is 0.5mm, the diameter of the through hole at each Archimedes spiral groove (3-3) center is 0.2mm, the width of the first strip groove (3-1) is 0.5mm, my 0.5mm of the width of each second strip groove (3-2).
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 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104241820A true CN104241820A (en) | 2014-12-24 |
| CN104241820B CN104241820B (en) | 2017-05-24 |
Family
ID=52229468
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410409814.0A Active CN104241820B (en) | 2014-08-19 | 2014-08-19 | PIFA with Archimedes spiral EBG structure used as floor board |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104241820B (en) |
Citations (6)
| 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 |
| US20130214984A1 (en) * | 2012-02-22 | 2013-08-22 | U.S. Army Research Laboratory Attn: Rdrl-Loc-I | 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 active Active
Patent Citations (6)
| 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 |
| US20130278481A1 (en) * | 2011-10-17 | 2013-10-24 | David R. Voltmer | Wideband Antenna Using Electromagnetic Bandgap Structures |
| US20130214984A1 (en) * | 2012-02-22 | 2013-08-22 | U.S. Army Research Laboratory Attn: Rdrl-Loc-I | Broadband electromagnetic band-gap (ebg) structure |
Non-Patent Citations (1)
| Title |
|---|
| LI YANG ET AL: "A Spiral Electromagnetic Bandgap (EBG) Structure and its Application in Microstrip Antenna Arrays", 《MICROWAVE CONFERENCE PROCEEDINGS, 2005. APMC. ASIA-PACIFIC CONFERENCE PROCEEDINGS》 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN104241820B (en) | 2017-05-24 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN107104277B (en) | Dual polarized tightly coupled dipole array antenna | |
| CN104103897B (en) | A kind of compact ultra-wideband antenna based on L-type parasitism band | |
| CN203760653U (en) | Small multiband electromagnetic band gap structure | |
| CN102544713B (en) | Frequency-reconfigurable ultra broad band antenna based on planar bi-layer section electromagnetic slit structure | |
| CN103531898B (en) | Based on the radio-frequency (RF) identification fractal antenna of Meta Materials | |
| CN103515700B (en) | A kind of RFID antenna | |
| CN105789855A (en) | Novel double-band EBG structure | |
| Kumar et al. | Design of CPW-fed fourth iterative UWB fractal antenna | |
| Kumar et al. | Design of coplanar waveguide-feed pentagonal-cut ultra-wide bandwidth fractal antenna and its backscattering | |
| Bashri et al. | A planar wideband inductively coupled feed patch antenna for UHF RFID tag | |
| Khabba et al. | Beam-steering millimeter-wave antenna array for fifth generation smartphone applications | |
| Anguera et al. | Enhancing robustness of handset antennas to finger loading effects | |
| CN104347941A (en) | Wideband planar antenna | |
| CN205159500U (en) | Antenna | |
| CN104241820B (en) | PIFA with Archimedes spiral EBG structure used as floor board | |
| CN108039574A (en) | Based on the double-stranded circular polarisation end-fire RFID reader antenna of flattening | |
| CN204333239U (en) | A kind of novel double frequency-band EBG structure | |
| Khanal et al. | Design of a compact pifa for wlan wi-fiwireless applications | |
| CN103794864B (en) | The square double-band printed antenna of symmetrical minor matters | |
| CN106684544B (en) | A kind of miniaturization monopole ultra-wideband antenna | |
| CN110556628A (en) | Novel multi-frequency broadband microstrip antenna | |
| TWI401605B (en) | Circularly polarized microstrip antenna for rfid tag | |
| CN104681934A (en) | Four-notch UWB (ultra wide band) antenna based on EBG (electromagnetic band gap) structure | |
| CN203932311U (en) | A kind of four trap UWB antennas based on EBG structure | |
| Kumar et al. | On the design of CPW-fed square octal shaped fractal UWB antenna |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |