CN203760653U - Small multiband electromagnetic band gap structure - Google Patents
Small multiband electromagnetic band gap structure Download PDFInfo
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- CN203760653U CN203760653U CN201320782088.8U CN201320782088U CN203760653U CN 203760653 U CN203760653 U CN 203760653U CN 201320782088 U CN201320782088 U CN 201320782088U CN 203760653 U CN203760653 U CN 203760653U
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- ebg
- band gap
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Abstract
The utility model relates to a small multiband electromagnetic band gap structure. The small multiband electromagnetic band gap structure comprises a metal grounding plate (10), a dielectric substrate (20), an EBG metal patch (30), an F-shaped groove (31) and a metal cylindrical through hole (32). Four completely identical and symmetrical F-shaped grooves are etched in a conventional mushroom-shape electromagnetic band gap structure (CMT - EBG), and an equivalent current path is extended to form a plurality of resonant circuits at the same time, so that the comprehensive design of the miniaturization and multiband is realized. A corresponding suspended microstrip line simulation model is constructed; through observation of a microstrip line transmission coefficient S21, the EBG structure forms four band gaps, and the characteristics of being small in size, good in band gap property, and the like are realized; and the small multiband electromagnetic band gap structure of the utility model can be applied to the multiband antenna, and can effectively improve various antenna performances.
Description
Technical field
The utility model relates to a kind of electro-magnetic bandgap (EBG) structure, especially a kind of small multiple band electromagnetic bandgap structure.By four identical and centrosymmetric F shape grooves of etching in traditional mushroom-shaped electromagnetic bandgap structure (CMT-EBG), when extending equivalent current path, form multiple resonant tanks, realize the comprehensive Design of miniaturization and multiband, there is the features such as size is little, band gap properties is excellent, can be applied in multiband antenna, effectively improve the properties of antenna.
Background technology
Electro-magnetic bandgap (EBG) structure, as a kind of special artificial cycle electromagnetic material, has been widely used in the field such as Radio-Frequency Wireless Communication and microwave antenna thereof.As microwave circuit, antenna, radar, radio frequency identification (RFID) with reduce the various aspects such as mobile phone SAR.
The frequency band gap characteristic of EBG structure can affect electromagnetic wave propagation and be widely used in Antenna Design in certain frequency range:
Frequency band gap characteristic can suppress the surface wave of microstrip antenna, increases the radiant power of antenna-coupled to free space, improves antenna efficiency; EBG material can also reduce surface wave edges of substrate produce secondary lobe and back lobe level, increase antenna front and back ratio, improve antenna pattern, improve antenna gain.
In array antenna design, EBG structure can reduce the mutual coupling between unit, eliminates the scan blind spot of array antenna.
The defect mode of EBG structure can design high directionality antenna, realizes the beam radiation of assigned direction, improves antenna gain.
Although EBG structure has been widely used in Antenna Design, due to the high speed development of wireless communication system, antenna is had higher requirement as low section, miniaturization, multiband, intelligent etc., and the research of corresponding EBG structure is still very weak, as aspects such as multiband EBG, miniaturization EBG, how the design of compatible multiband and miniaturization remains a difficult problem.Therefore design a small multiple band EBG structure, can more effectively be applied in multiband antenna, improve the properties of antenna, there is practical value and application prospect.
Utility model content
The purpose of this utility model is to realize the comprehensive Design of EBG miniaturized structure and multiband, thereby adapts to better the fast development of antenna, improves the properties of antenna.By four identical and centrosymmetric F shape grooves of etching in traditional mushroom-shaped electromagnetic bandgap structure (CMT-EBG), when extending equivalent current path, introduce multiple resonant tanks, realize the comprehensive Design of miniaturization and multifrequency.
The technical scheme that the utility model adopts is:
A kind of small multiple band electromagnetic bandgap structure, it is characterized in that: comprise metal ground plate (10), medium substrate (20), EBG metal patch (30), F shape groove (31) and round metal cylindricality via hole (32), EBG metal patch (30) and metal ground plate (10) lay respectively at the upper and lower surface of medium substrate (20), F shape groove (31) is etched on EBG metal patch (30), and round metal cylindricality via hole (32) is vertically through metal ground plate (10), medium substrate (20) and EBG metal patch (30).
Described a kind of small multiple band electromagnetic bandgap structure, is characterized in that: EBG metal patch (30) is square, and round metal cylindricality via hole (32) is positioned at EBG construction unit center.
Described a kind of small multiple band electromagnetic bandgap structure, is characterized in that: in the upper etching of EBG metal patch (30) four the identical F shape of parameters of structural dimension grooves (31); Four F shape grooves (31) are symmetrical about EBG unit center, and any one F Xing Caoyan center respectively 90-degree rotation, 180 degree and 270 degree all can obtain other three F shape grooves.
The utility model has following advantage and characteristic with respect to prior art:
(1) little than mushroom-shaped electro-magnetic bandgap (CMT-EBG) physical dimension, the first band gap frequency resonant point (1.43GHz) has reduced 40.4% than the CMT-EBG structure band gap frequency resonant point (2.4GHz) of same size parameter.
(2), at 1.43GHz, 3.54GHz, has produced four band gap near 5GHz and 7.28GHz.Realize the comprehensive Design of miniaturization and multiband.
(3) band gap properties is good, four band gap transmission coefficients all-below 30dB, can reach-69.7dB of maximum, maximum band gap broadband reaches 1.24GHz, relative bandwidth reaches 16.4%.
(4) simple in structure, be easy to microwave circuit integratedly, can be applied to better in Antenna Design, improve the performance of antenna.
Brief description of the drawings
Fig. 1 is EBG basic structure vertical view;
Fig. 2 is EBG suspension microstrip line simulation model front view;
Fig. 3 is EBG suspension microstrip line simulation model vertical view;
Fig. 4 is suspension microstrip line transmission coefficient S21 simulation result figure;
Embodiment
Below in conjunction with accompanying drawing, the utility model will be further described.
As shown in Figure 1, a kind of small multiple band electromagnetic bandgap structure, comprises metal ground plate (10), medium substrate (20), EBG metal patch (30), F shape groove (31) and round metal cylindricality via hole (32).Wherein metal ground plate (10), medium substrate (20) and EBG metal patch (30) are all square, and metal ground plate (10) length of side is W
0=13mm, medium substrate (20) is of a size of 13mm*13mm*0.8mm, EBG metal patch (30) is smaller, is of a size of 12mm*12mm, and the distance at EBG metal patch (30) Edge Distance medium substrate (20) edge is 0.5mm.
Electromagnetic bandgap structure of the present utility model, the relative dielectric constant of medium substrate (20) is 4.4, is highly h=0.8mm, processing cost is low, is easy to common printed circuit board integrated.
Round metal cylindricality via hole (32) is through between EBG metal patch (30), medium substrate (20) and metal ground plate (10), and is positioned at EBG unit center, and radius is 0.3mm.
The upper etching of EBG metal patch (30) four the identical F shape of parameters of structural dimension grooves (31).Four F shape grooves (31) are symmetrical about EBG unit center, in the shape of a spiral, any one F shape groove respectively along central rotation 90 spend, 180 degree and 270 degree all can obtain other three F shape grooves.
As Fig. 2, shown in Fig. 3, in order to observe the band gap properties of this utility model EBG structure, construct suspension microstrip line simulation model, EBG structure is placed between suspension microstrip line (40) and metal ground plate (10), form " sandwich " structure, it is upper that suspension microstrip line (40) is etched in Supporting Media (21), observes the transmission coefficient S21 of suspension microstrip line (40).Supporting Media (21) can be identical with the medium substrate of EBG structure (20), also can be different, suspension microstrip line (40) forms close coupling with EBG structure, has reduced the impact of other parasitic communication modes, can clearly illustrate the band gap properties of EBG structure.
Suspension microstrip line simulation model, comprises metal ground plate (10), medium substrate (20), Supporting Media (21), four identical EBG metal patches (30), round metal cylindricality via hole (31) and suspension microstrip line (40).Size is 4W
0* W
0* 2h, i.e. 52mm*13mm*1.6mm.
Four identical EBG parallelism structurals are arranged, and are positioned at bottom.Upper strata Supporting Media (21) and medium substrate (20) are selected identical dielectric material, and are highly all 0.8mm.Top layer suspension microstrip line (40) is 50 ohm microstrip, is of a size of 52mm*3.2mm.
As Fig. 1, shown in Fig. 2, analyze the formation principle of this utility model EBG miniaturized structure and multiband here from the simple and easy equivalent-circuit model of EBG structure.
As shown in Figure 2, in the time passing through 50 ohm of feeder lines (31) to suspension microstrip line (40) feed, contiguous two EBG metal patches (30) intercouple, and the charges of different polarity are assembled in patch edges, formation is parallel to surperficial voltage, can use equivalent capacity C
1characterize.Because the charges of different polarity need neutralization, therefore along EBG metal patch (30) surface, cylindrical metal via hole (31), metal ground plate (10) flow, and form current circuit, can use equivalent inductance L
1characterize, thereby formed a LC resonant tank in parallel, form first band gap.
As shown in Figure 1, due to the etching of F shape groove (31), metal patch forms helical form, and the charges of different polarity are assembled on every groove both sides, can use equivalent capacity C
2, C
3, C
4characterize.The charges of different polarity need neutralization, and therefore along EBG metal patch (30) surface, cylindrical metal via hole (31), metal ground plate (10) flow, and form current circuit, can use equivalent inductance L
2, L
3, L
4characterize, thus form three LC resonant tanks in parallel, form respectively second, third, the 4th band gap.
As shown in Figure 1, due to the etching of F shape groove (31), EBG metal patch (30) forms helical form, and compared with the CMT-EBG structure of same size, the equivalent current path of the first band gap is extended, equivalent inductance L
1increase, the first resonance frequency reduces, and size reduces greatly.
As Fig. 1, Fig. 2, shown in Fig. 3, the concrete structure of EBG structure is of a size of: W
0=13mm, L
0=52mm, W
1=0.6mm, W
2=0.6mm, W
3=0.5mm, W
4=0.5mm, g
1=0.5mm, g
2=0.4mm, g
3=0.5mm, h=0.8mm, r=0.3mm, g=0.5mm, W
f=3.2mm.
As shown in Figure 4, for suspension microstrip line S21 simulation result figure, can obviously see and in the frequency range of 0-9GHz, form four band gap, frequency resonant point is respectively 1.43GHz, 3.54GHz, 5GHz and 7.28GHz.The first band gap frequency resonant point is less by 40.4% with the band gap frequency resonant point (2.49GHz) of the CMT-EBG structure of model than same size, the first band gap-10dB frequency range is 1.42GHz-1.52GHz, relative bandwidth is reach-31dB of 6.8%, S21 minimum point.The second band gap-10dB frequency range is 3.42GHz-3.78GHz, relative bandwidth is reach-60.8dB of 10%, S21 minimum point.The 3rd band gap-10dB frequency range is 4.86GHz-5.19GHz, relative bandwidth is reach-39.5dB of 6.6%, S21 minimum point.Four-tape gap-10dB frequency range is 6.95GHz-8.20GHz, relative bandwidth is 16.4%.The utility model EBG structure, size is little, and band gap properties is good, can be used in multiband antenna, effectively improves the properties of antenna.
Claims (3)
1. a small multiple band electromagnetic bandgap structure, it is characterized in that: comprise metal ground plate (10), medium substrate (20), EBG metal patch (30), F shape groove (31) and round metal cylindricality via hole (32), EBG metal patch (30) and metal ground plate (10) lay respectively at the upper and lower surface of medium substrate (20), F shape groove (31) is etched on EBG metal patch (30), and round metal cylindricality via hole (32) is vertically through metal ground plate (10), medium substrate (20) and EBG metal patch (30).
2. a kind of small multiple band electromagnetic bandgap structure according to claim 1, is characterized in that: EBG metal patch (30) is square, and round metal cylindricality via hole (32) is positioned at EBG construction unit center.
3. a kind of small multiple band electromagnetic bandgap structure according to claim 1, is characterized in that: in the upper etching of EBG metal patch (30) four the identical F shape of parameters of structural dimension grooves (31); Four F shape grooves (31) are symmetrical about EBG unit center, and any one F Xing Caoyan center respectively 90-degree rotation, 180 degree and 270 degree all can obtain other three F shape grooves.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320782088.8U CN203760653U (en) | 2013-11-27 | 2013-11-27 | Small multiband electromagnetic band gap structure |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320782088.8U CN203760653U (en) | 2013-11-27 | 2013-11-27 | Small multiband electromagnetic band gap structure |
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| Publication Number | Publication Date |
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| CN203760653U true CN203760653U (en) | 2014-08-06 |
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| CN201320782088.8U Expired - Fee Related CN203760653U (en) | 2013-11-27 | 2013-11-27 | Small multiband electromagnetic band gap structure |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104466382A (en) * | 2014-12-31 | 2015-03-25 | 厦门大学 | Stacked microstirp antenna based on nested recursion rotational symmetry CSRR distribution array |
| CN106374214A (en) * | 2016-11-28 | 2017-02-01 | 重庆智能水表集团有限公司 | Mini spiral microstrip antenna |
| CN107896420A (en) * | 2017-11-10 | 2018-04-10 | 英业达科技有限公司 | Circuit board and its electromagnetic bandgap structure |
| CN108281797A (en) * | 2017-12-08 | 2018-07-13 | 西安电子科技大学 | High angle stability frequency-selective surfaces based on 2.5D braiding structures |
| CN111077170A (en) * | 2019-12-25 | 2020-04-28 | 杭州电子科技大学 | High-sensitivity microwave microfluidic sensor based on electromagnetic band gap structure |
| CN111122981A (en) * | 2019-12-25 | 2020-05-08 | 杭州电子科技大学 | High-sensitivity microfluidic sensor for measuring dielectric constant of liquid |
| CN112271447A (en) * | 2020-09-14 | 2021-01-26 | 广东盛路通信科技股份有限公司 | Millimeter wave magnetic electric dipole antenna |
| CN113552539A (en) * | 2021-06-22 | 2021-10-26 | 珠海市海米软件技术有限公司 | Resonance electromagnetic decoupling component for improving millimeter wave radar receiving and transmitting isolation |
-
2013
- 2013-11-27 CN CN201320782088.8U patent/CN203760653U/en not_active Expired - Fee Related
Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104466382A (en) * | 2014-12-31 | 2015-03-25 | 厦门大学 | Stacked microstirp antenna based on nested recursion rotational symmetry CSRR distribution array |
| CN104466382B (en) * | 2014-12-31 | 2017-01-25 | 厦门大学 | Stacked microstirp antenna based on nested recursion rotational symmetry CSRR distribution array |
| CN106374214A (en) * | 2016-11-28 | 2017-02-01 | 重庆智能水表集团有限公司 | Mini spiral microstrip antenna |
| CN107896420A (en) * | 2017-11-10 | 2018-04-10 | 英业达科技有限公司 | Circuit board and its electromagnetic bandgap structure |
| CN108281797A (en) * | 2017-12-08 | 2018-07-13 | 西安电子科技大学 | High angle stability frequency-selective surfaces based on 2.5D braiding structures |
| CN108281797B (en) * | 2017-12-08 | 2019-11-15 | 西安电子科技大学 | High angle stability frequency-selective surfaces based on 2.5D braiding structure |
| CN111077170A (en) * | 2019-12-25 | 2020-04-28 | 杭州电子科技大学 | High-sensitivity microwave microfluidic sensor based on electromagnetic band gap structure |
| CN111122981A (en) * | 2019-12-25 | 2020-05-08 | 杭州电子科技大学 | High-sensitivity microfluidic sensor for measuring dielectric constant of liquid |
| CN111122981B (en) * | 2019-12-25 | 2022-02-18 | 杭州电子科技大学 | High-sensitivity microfluidic sensor for measuring dielectric constant of liquid |
| CN111077170B (en) * | 2019-12-25 | 2022-02-22 | 杭州电子科技大学 | High-sensitivity microwave microfluidic sensor based on electromagnetic band gap structure |
| CN112271447A (en) * | 2020-09-14 | 2021-01-26 | 广东盛路通信科技股份有限公司 | Millimeter wave magnetic electric dipole antenna |
| CN112271447B (en) * | 2020-09-14 | 2023-09-15 | 广东盛路通信科技股份有限公司 | Millimeter wave magneto-electric dipole antenna |
| CN113552539A (en) * | 2021-06-22 | 2021-10-26 | 珠海市海米软件技术有限公司 | Resonance electromagnetic decoupling component for improving millimeter wave radar receiving and transmitting isolation |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140806 Termination date: 20151127 |