CN104901006A - Multiband microstrip MIMO antenna based on fractal structure - Google Patents
Multiband microstrip MIMO antenna based on fractal structure Download PDFInfo
- Publication number
- CN104901006A CN104901006A CN201510342095.XA CN201510342095A CN104901006A CN 104901006 A CN104901006 A CN 104901006A CN 201510342095 A CN201510342095 A CN 201510342095A CN 104901006 A CN104901006 A CN 104901006A
- Authority
- CN
- China
- Prior art keywords
- radiation patch
- mimo antenna
- micro
- monopole radiation
- multiband
- 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 provides a multiband microstrip MIMO antenna based on a second-order Koch fractal structure, and is used for solving the problem that the size of an existing multiband microstrip MIMO antenna is too large. According to the multiband microstrip MIMO antenna based on the second-order Koch fractal structure, two multiband microstrip MIMO antenna units are vertically placed in the center, each antenna unit includes a radiation patch, a medium substrate, a floor and a feed port, wherein the radiation patch and the floor are printed on upper and lower surfaces of the medium substrate respectively, the feed port is mounted on a side face of the medium substrate and connected with the radiation patch, the radiation patch of each antenna unit consists of three mutually connected monopole radiation patches, each monopole radiation patch partially adopts second-order Koch fractal technology, and the floor adopts a truncated structure and is printed on the bottom of the lower surface of the medium substrate. According to the multiband microstrip MIMO antenna based on the second-order Koch fractal structure, the size of the antenna is reduced by use of the fractal structure, and a result of working on multiple frequency bands simultaneously can be realized, and the multiband microstrip MIMO antenna can be applied to a modern wireless communication system.
Description
Technical field
The invention belongs to antenna technical field, particularly relate to the micro-band mimo antenna of a kind of multiband based on second order Koch fractal structure.
Background technology
Along with the fast development of wireless communication technology, the wretched insufficiency of frequency resource becomes the bottleneck of containment radio communication career development day by day.Radio communication is just towards Large Copacity, high transmission rates and high reliability future development, for frequency spectrum resource limited at present, how to improve the availability of frequency spectrum to greatest extent, be a heat subject of current research, MIMO technology is undoubtedly a technology of most potentiality and most advantage in numerous method.
Mimo system is that a kind of being used for describes the abstract mathematical model of multi-aerial radio communication system, and multiple antennas of transmitting terminal can be utilized independently to send signal separately, to receive simultaneously and recover prime information at receiving terminal with multiple antenna.Because MIMO can, when not needing the data throughout and the transmission range that increase system when increasing bandwidth or total transmitted power consume significantly, make this technology in being subject to many attracting attention in recent years.
In the design of mimo antenna, the factor such as number, array structure, the mode of array placement, the design of antenna element of array element directly affects the spatial coherence of mimo channel.Mimo system requires that in array, each antenna element has less correlation, such guarantee mimo channel response matrix is close to full rank, but owing to being subject to the restriction of receiver or transmitter size and structure, often will in limited space layout antenna element as much as possible.
Because microstrip antenna has, volume is little, lightweight, thin profile, structure simple, be easy to processing and fabricating, so microstrip antenna is one of way of realization forming mimo antenna.Microstrip antenna applies with metal radiation paster, the deposited antenna making ground plate with thin metal layer of one side at one piece of thickness much smaller than the one side of the dielectric substrate of operation wavelength, utilize microstrip line or coaxial feeding, electromagnetic field has been encouraged between conductor patch and ground plate, and by the gap between paster surrounding and ground plate to external radiation.Along with the development of wireless communication technology, whenever the antenna for wireless communications application all will will process more frequency band than ever.
At present, the mode that microstrip antenna realizes multiple-frequency operation mainly contains:
1, adopt single paster, utilize two kinds of different patterns to realize work;
2, multiple-layer overlapped paster structure is adopted;
3, the structure of single layer substrate, multiple paster is adopted;
4, near rectangular patch radiating side, gap etc. is etched.
On April 28th ~ 30,2014, in the 31 National Radio science meeting, paper Design and Implementation of Reconfigurable Quad---the Band Microstrip Antenna for MIMO Wireless Communication Application that the people such as Mohamed Mamdouh M.Ali deliver, the article disclose the micro-band mimo antenna of a kind of four frequency band, its mode adopting monopole paster to combine achieves multiband operation, but because the frequency dependent of monopole paster work is in its physical size, now monopole radiation patch size is larger, this antenna can realize the characteristic of multiband operation, but entire physical is oversize.
Summary of the invention
The object of the invention is to the deficiency overcoming prior art existence, proposing the micro-band mimo antenna of a kind of multiband based on fractal structure, for solving the large problem of existing multiband micro-band mimo antenna size.
For achieving the above object, the technical solution used in the present invention is:
The micro-band mimo antenna of a kind of multiband based on fractal structure, arranged by two multiband micro-band mimo antenna unit and form, this antenna element comprises radiation patch, medium substrate, floor and feed port, radiation patch and floor are printed on the upper and lower surface of medium substrate respectively, feed port is arranged on the side of medium substrate, and is connected with radiation patch; The radiation patch of each antenna element is made up of three monopole radiation patch, and these three monopole radiation patch all partly adopt fractal structure, wherein, the U-shaped minor matters that first monopole radiation patch 1 is saved by major branch and loads on its top are formed, second monopole radiation patch 2 and the 3rd monopole radiation patch 3 all adopt L-type structure, and are connected with the first monopole radiation patch 1; Described floor 4 adopts the structure of brachymemma, is printed on the bottom of medium substrate 5 lower surface.
The micro-band mimo antenna of the above-mentioned multiband based on fractal structure, described three monopole radiation patch 1,2, in 3, the first half of major branch joint of first monopole radiation patch 1 and the perpendicular minor matters of the L-type structure of U-shaped minor matters, the second monopole radiation patch 2 and the 3rd monopole radiation patch 3 all adopt second order Koch fractal structure, for increasing the path of radiation patch surface current.
The micro-band mimo antenna of the above-mentioned multiband based on fractal structure, described radiation patch adopts the copper material of electroplate.
The micro-band mimo antenna of the above-mentioned multiband based on fractal structure, described medium substrate adopts rectangle organic high molecular polymer material, and its relative dielectric constant is 2.95.
The micro-band mimo antenna of the above-mentioned multiband based on fractal structure, the width of described three monopole radiation patch is equal, and the length of the first monopole radiation patch 1, second monopole radiation patch 2 and the 3rd monopole radiation patch 3 reduces successively, for realizing simultaneously in the effect of different frequency range work.
The micro-band mimo antenna of the above-mentioned multiband based on fractal structure, the height on described floor 4 is not more than under the horizontal minor matters of the L-type structure of the second monopole radiation patch 2 along the distance with medium substrate 5 lower end.
The micro-band mimo antenna of the above-mentioned multiband based on fractal structure, described adjacent antenna units puts middle placement in orthogonal mode.
The present invention compared with prior art, has the following advantages:
1, the radiation patch in multiband of the present invention micro-band mimo antenna unit is owing to have employed the structure combined by three monopole radiation patch, wherein the first monopole radiation patch is that the U-shaped paster being saved by major branch and load on its top is formed, patch length after both combinations is the longest, therefore, it is possible to be operated in two lower frequency bands, the length of the second monopole radiation patch is greater than the 3rd monopole radiation patch, can be operated in two higher frequency bands, therefore multiband micro-band mimo antenna unit can be operated in four frequency bands simultaneously.
2, three monopole radiation patch in multiband of the present invention micro-band mimo antenna unit are owing to all have employed the fractal line structure of second order Koch, add the surface-pathlength of electric current in each monopole radiation patch, reduce the length of single monopole radiation patch, thus effectively reduce the physical dimension of whole antenna.
3, the floor in multiband of the present invention micro-band mimo antenna unit have employed the structure of brachymemma, and the height on this floor is not more than the distance of the second monopole radiation patch and medium substrate lower end, reduce the impact of floor on the impedance bandwidth of antenna, therefore make the matching effect that antenna reaches good.
Accompanying drawing explanation
Fig. 1 is the overall structure schematic diagram of two multiband micro-band mimo antenna unit in the present invention;
Fig. 2 is the structural representation of multiband micro-band mimo antenna unit in the present invention;
Fig. 3 is the S of multiband micro-band mimo antenna unit in the present invention
11figure;
Fig. 4 is the S parameter figure of the micro-band mimo antenna of multiband in the present invention.
Embodiment
In order to make the object, technical solutions and advantages of the present invention clearly, below in conjunction with accompanying drawing and instantiation, the present invention is described in further detail.
With reference to Fig. 1, the present invention is made up of two multiband micro-band mimo antenna unit, and the mutual Vertically of radiation patch of these two multiband micro-band mimo antenna unit is placed, and be printed on the upper surface of medium substrate, both spacing are 8.75mm; In order to easy to process, the length on the floor in multiband micro-band mimo antenna unit on right side is equal with the width of medium substrate; Medium substrate in multiband micro-band mimo antenna unit on right side adopts the square that the length of side is identical with its length, and be connected with the medium substrate in the multiband in left side micro-band mimo antenna unit, the size of the medium substrate adopted is 100mm × 55mm × 1.6mm.
With reference to Fig. 2, multiband micro-band mimo antenna unit comprises: radiation patch, feed port, floor 4 and medium substrate 5, and described radiation patch and floor 4 are printed in the upper and lower surface of medium substrate 5 respectively, and feed port is arranged on the side of medium substrate 5.Wherein radiation patch is by the first monopole radiation patch 1, second monopole radiation patch 2 and the 3rd monopole radiation patch 3 form, these three monopole radiation patch 1, the width of 2 and 3 is 4mm, and all part adopts second order Koch fractal structure, the length of side of the fractal corner cut of Koch is 2/3mm, its angle is 60 degree, described first monopole radiation patch 1 was saved and be carried in its top U-shaped minor matters by major branch are formed, wherein the length of major branch joint is 52mm, from distance medium substrate lower end more than 21.67mm, major branch is saved both sides and replace with Fractal Boundary, the lower end of major branch joint is connected with feed port, the left wall of U-shaped minor matters and the length of right arm are respectively 24mm and 18mm, its two-arm border is replaced with Fractal Boundary, the length of coupling part is 33.5mm, also its both sides are replaced with Fractal Boundary, second monopole radiation patch 2 adopts L-type structure, and the horizontal minor matters length of this L-type structure is 5.25mm, and the length of perpendicular minor matters is 29mm, and wherein the both sides of perpendicular minor matters replace with Fractal Boundary, 3rd monopole radiation patch 3 is the shorter L-type structures of a length, and wherein the degree of spreading anyhow of L-type structure is 5.25mm, and the length of perpendicular minor matters is 16mm, and wherein the both sides of perpendicular minor matters replace with Fractal Boundary, horizontal minor matters one end of second monopole radiation patch 2 and the 3rd monopole radiation patch 3 is saved with the major branch of the first monopole radiation patch 1 and is connected, wherein the second monopole radiation patch 2 saves with the major branch of the first monopole radiation patch 1 at distance medium substrate 5 lower boundary 13mm place and is connected, 3rd monopole radiation patch 3 saves with the major branch of the first monopole radiation patch 1 at the lower boundary 22.67mm place of distance medium substrate 7 and is connected, first monopole radiation patch can work at 0.95GHz and 1.98GHz, second monopole radiation patch can work at 2.5GHz, 3rd monopole radiation patch can work at 3.4GHz.Medium substrate 5 is of a size of 55mm × 45mm × 1.6mm, and relative dielectric constant is 2.95; Floor 4 is positioned at the bottom of medium substrate 5 lower surface, is of a size of 45mm × 10.5mm.
Technique effect of the present invention can be described further in conjunction with simulation result:
1, content is emulated
1.1 utilize business simulation software HFSS_13.0 to the S of multiband micro-band mimo antenna unit of employing fractal structure
11parameter carries out simulation calculation, and result as shown in Figure 3.
1.2 utilize business simulation software HFSS_13.0 to carry out simulation calculation to adopting multiband micro-band mimo antenna cell S parameter of fractal structure, and result as shown in Figure 4.
2, simulation result
With reference to Fig. 3, with S
11≤-10dB is standard, adopts multiband micro-band mimo antenna unit of fractal structure to work at 0.95GHz, 1.98GHz, 2.5GHz and 3.4GHz simultaneously.
With reference to Fig. 4, adopt the S of the micro-band mimo antenna of multiband of fractal structure
11substantially the identical S of parameter and its unit
11parameter, the isolation between mimo antenna unit remains on below-20db substantially, has good isolation effect.
The structure that the present invention uses three monopole radiation patch to combine achieves the result of four frequency bands, and utilizes second order Koch fractal structure to reduce the size of antenna.
More than describing is only example of the present invention, does not form any limitation of the invention.Obviously for those skilled in the art; after understanding content of the present invention and principle; all may when not deviating from the principle of the invention, structure; carry out the various correction in form and details and change, but these corrections based on inventive concept and change are still within claims of the present invention.
Claims (7)
1. the micro-band of the multiband based on a fractal structure mimo antenna, arranged by two multiband micro-band mimo antenna unit and form, this antenna element comprises radiation patch, medium substrate, floor and feed port, radiation patch and floor are printed on the upper and lower surface of medium substrate respectively, feed port is arranged on the side of medium substrate, and be connected with radiation patch, it is characterized in that: the radiation patch of each antenna element is made up of three monopole radiation patch, and these three monopole radiation patch all partly adopt fractal structure, wherein, the U-shaped minor matters that first monopole radiation patch (1) is saved by major branch and loads on its top are formed, second monopole radiation patch (2) and the 3rd monopole radiation patch (3) all adopt L-type structure, and be connected with the first monopole radiation patch (1), described floor (4) adopts the structure of brachymemma, is printed on the bottom of medium substrate (5) lower surface.
2. the micro-band mimo antenna of the multiband based on fractal structure according to claim 1, it is characterized in that described three monopole radiation patch (1,2,3) in, the first half of major branch joint and the perpendicular minor matters of U-shaped minor matters, the second monopole radiation patch (2) and the 3rd monopole radiation patch (3) L-type structure of the first monopole radiation patch (1) all adopt second order Koch fractal structure, for increasing the path of radiation patch surface current.
3. the micro-band mimo antenna of the multiband based on fractal structure according to claim 1, is characterized in that described radiation patch adopts the copper material of electroplate.
4. the micro-band mimo antenna of the multiband based on fractal structure according to claim 1, it is characterized in that described medium substrate (5) adopts rectangle organic high molecular polymer material, its relative dielectric constant is 2.95.
5. the micro-band mimo antenna of the multiband based on fractal structure according to claim 1, it is characterized in that the width of described three monopole radiation patch is equal, and the length of the first monopole radiation patch (1), the second monopole radiation patch (2) and the 3rd monopole radiation patch (3) reduces successively, for realizing simultaneously in the effect of different frequency range work.
6. the micro-band mimo antenna of the multiband based on fractal structure according to claim 1, is characterized in that the height on described floor (4) is not more than under the horizontal minor matters of the second monopole radiation patch (2) L-type structure along the distance with medium substrate (5) lower end.
7. the micro-band mimo antenna of the multiband based on fractal structure according to claim 1, is characterized in that putting middle arrangement in orthogonal mode between described two antenna elements.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510342095.XA CN104901006B (en) | 2015-06-18 | 2015-06-18 | Multiband micro-strip mimo antenna based on fractal structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510342095.XA CN104901006B (en) | 2015-06-18 | 2015-06-18 | Multiband micro-strip mimo antenna based on fractal structure |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104901006A true CN104901006A (en) | 2015-09-09 |
| CN104901006B CN104901006B (en) | 2018-05-25 |
Family
ID=54033515
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510342095.XA Active CN104901006B (en) | 2015-06-18 | 2015-06-18 | Multiband micro-strip mimo antenna based on fractal structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104901006B (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106469849A (en) * | 2016-09-30 | 2017-03-01 | 广东顺德中山大学卡内基梅隆大学国际联合研究院 | A kind of multi-frequency monopole sub-antenna dividing shape to radiate Bending minor matters with KOCH |
| CN106785391A (en) * | 2016-12-16 | 2017-05-31 | 华南理工大学 | A kind of light-operated frequency reconfigurable antenna of cognitive radio |
| CN109494463A (en) * | 2018-11-09 | 2019-03-19 | 榆林学院 | A kind of high-isolation mimo antenna of complementation semicircular structure |
| CN111679132A (en) * | 2020-05-28 | 2020-09-18 | 南京邮电大学 | Broadband and high-sensitivity portable microwave radiation detection device and system |
| CN112018510A (en) * | 2019-05-31 | 2020-12-01 | 杭州海康威视数字技术股份有限公司 | Ultra-wideband antenna |
| CN112103638A (en) * | 2020-09-09 | 2020-12-18 | 安徽师范大学 | Four-band cactus palm-shaped small-sized microstrip antenna based on 5G frequency band and WLAN frequency band |
| CN113871863A (en) * | 2021-10-29 | 2021-12-31 | 厦门大学 | Three-fork corner-cut fractal array indoor positioning beacon antenna |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103490155A (en) * | 2013-09-24 | 2014-01-01 | 西安电子科技大学 | Four-frequency-band printed antenna applied to wireless communications |
| CN104282989A (en) * | 2014-10-28 | 2015-01-14 | 成都龙腾中远信息技术有限公司 | Double-antenna shielding structure |
| CN104538731A (en) * | 2015-02-05 | 2015-04-22 | 电子科技大学 | Multi-frequency high-isolation MIMO antenna |
| CN204303993U (en) * | 2015-01-16 | 2015-04-29 | 厦门大学嘉庚学院 | Multiband dipole mobile communication antenna |
-
2015
- 2015-06-18 CN CN201510342095.XA patent/CN104901006B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103490155A (en) * | 2013-09-24 | 2014-01-01 | 西安电子科技大学 | Four-frequency-band printed antenna applied to wireless communications |
| CN104282989A (en) * | 2014-10-28 | 2015-01-14 | 成都龙腾中远信息技术有限公司 | Double-antenna shielding structure |
| CN204303993U (en) * | 2015-01-16 | 2015-04-29 | 厦门大学嘉庚学院 | Multiband dipole mobile communication antenna |
| CN104538731A (en) * | 2015-02-05 | 2015-04-22 | 电子科技大学 | Multi-frequency high-isolation MIMO antenna |
Non-Patent Citations (2)
| Title |
|---|
| CHING-SONG CHUANG等: ""A Compact multi band MIMO antenna"", 《ELECTRICAL AND ELECTRONICS ENGINEERING (ELECO), 2013 8TH INTERNATIONAL CONFERENCE ON》 * |
| QISHENG WANG等: ""A Novel Spherical Conformal Microstrip Patch Antenna Based on Fractal Concepts"", 《MICROWAVE AND MILLIMETER WAVE TECHNOLOGY, 2007》 * |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106469849A (en) * | 2016-09-30 | 2017-03-01 | 广东顺德中山大学卡内基梅隆大学国际联合研究院 | A kind of multi-frequency monopole sub-antenna dividing shape to radiate Bending minor matters with KOCH |
| CN106469849B (en) * | 2016-09-30 | 2019-05-03 | 广东顺德中山大学卡内基梅隆大学国际联合研究院 | A kind of band KOCH divides the multi-frequency monopole sub-antenna of shape radiation Bending minor matters |
| CN106785391A (en) * | 2016-12-16 | 2017-05-31 | 华南理工大学 | A kind of light-operated frequency reconfigurable antenna of cognitive radio |
| CN109494463A (en) * | 2018-11-09 | 2019-03-19 | 榆林学院 | A kind of high-isolation mimo antenna of complementation semicircular structure |
| CN112018510A (en) * | 2019-05-31 | 2020-12-01 | 杭州海康威视数字技术股份有限公司 | Ultra-wideband antenna |
| CN111679132A (en) * | 2020-05-28 | 2020-09-18 | 南京邮电大学 | Broadband and high-sensitivity portable microwave radiation detection device and system |
| CN112103638A (en) * | 2020-09-09 | 2020-12-18 | 安徽师范大学 | Four-band cactus palm-shaped small-sized microstrip antenna based on 5G frequency band and WLAN frequency band |
| CN113871863A (en) * | 2021-10-29 | 2021-12-31 | 厦门大学 | Three-fork corner-cut fractal array indoor positioning beacon antenna |
| CN113871863B (en) * | 2021-10-29 | 2022-12-30 | 厦门大学 | Three-fork corner-cutting fractal array indoor positioning beacon antenna |
Also Published As
| Publication number | Publication date |
|---|---|
| CN104901006B (en) | 2018-05-25 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN106961016B (en) | Four-unit MIMO antenna with different polarization and directional patterns | |
| CN104901006A (en) | Multiband microstrip MIMO antenna based on fractal structure | |
| Haraz et al. | Design of a 28/38 GHz dual-band printed slot antenna for the future 5G mobile communication Networks | |
| CN103858277B (en) | A kind of three poliarizing antennas | |
| CN102110900B (en) | Array antenna of mobile terminal and implementation method of array antenna | |
| CN1922758B (en) | Diversity antenna arrangement | |
| CN101316008B (en) | MIMO mobile terminal multi-antenna with high isolation and low correlated characteristic | |
| US8803742B2 (en) | Dual-band MIMO antenna system | |
| CN102842756B (en) | Dual-polarization MIMO (Multiple Input Multiple Output) antenna array | |
| CN110957576B (en) | Ultra-low profile microstrip laminated dual-polarized base station antenna and array | |
| EP2999046B1 (en) | Multi-antenna system and mobile terminal | |
| US7812768B2 (en) | Multiple input multiple output antenna | |
| CN104701623A (en) | High-isolation MIMO (Multiple Input Multiple Output) antenna | |
| CN102280696A (en) | Half-wave transmission decoupling small-space microstrip array antenna | |
| CN109301486B (en) | Single-layer patch type microwave millimeter wave cross-frequency-band dual-polarized radiation unit for 5G mobile communication | |
| CN104868247A (en) | Circular back cavity structure directivity three-polarization antenna | |
| CN202855895U (en) | Dual polarized MIMO antenna array | |
| CN105356070A (en) | Dual-band co-aperture array antenna | |
| Ren et al. | Coexist design of sub-6GHz and millimeter-wave antennas for 5G mobile terminals | |
| Abdullah et al. | Compact four-port MIMO antenna system at 3.5 GHz | |
| CN108400427A (en) | Antenna system | |
| Ali et al. | Dual-band millimeter-wave microstrip patch array antenna for 5G smartphones | |
| CN103560325A (en) | Broadband Quari-Yagi antenna applied to multi-band frequency wireless communication system | |
| CN109509965B (en) | 5G broadband MIMO antenna system based on coupled loop antenna and mobile terminal | |
| CN114256614A (en) | Ultra-wideband planar antenna array applied to millimeter wave communication system |
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 |