CN205122754U - Four miniaturized unit dual -frenquency MIMO antennas - Google Patents
Four miniaturized unit dual -frenquency MIMO antennas Download PDFInfo
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- CN205122754U CN205122754U CN201520845356.5U CN201520845356U CN205122754U CN 205122754 U CN205122754 U CN 205122754U CN 201520845356 U CN201520845356 U CN 201520845356U CN 205122754 U CN205122754 U CN 205122754U
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Abstract
The utility model provides a four miniaturized unit dual -frenquency MIMO antennas, sets up in a surface of medium base plate, including an antenna element, the 2nd antenna element, the 3rd antenna element and fourth antenna element, an antenna element and the 2nd antenna element for the symmetry set up in the PIFA antenna of the relative both sides in surface, the 3rd antenna element is loop aerial, with the 2nd antenna element is coupled and sets up between an antenna element and the 2nd antenna element, fourth antenna element is vertical polarized antenna, set up in the surface is located an antenna element with in the 2nd antenna element's the symmetry axis extension line orientation. Through PIFA antenna, loop aerial and the vertical polarized antenna who adopts two similar horizontal polarisation, increase the isolation between antenna element through the pertinent mode of putting, the mode that promotes the isolation need not add any uncoupling, EBG structure, crack etc. Reduces the method of coupling.
Description
Technical field
The utility model relates to antenna technology, particularly relates to a kind of miniaturized four unit double frequency mimo antenna.
Background technology
Along with mobile communication terminal is miniaturized and the development of complanation, current most communication device calls antenna is under the prerequisite of retention, and size is little as much as possible.For mimo system, along with the reduction of antenna size, the coupling between antenna unit is strengthened gradually, thus causes the isolation between antenna element to diminish, and affects the transmission rate of communication equipment further.Current four unit mimo antenna adopt the method for uncoupling to mainly contain: adopt EBG floor panel structure; Floor embeds finedraw and forms decoupling structure; Increase floor branched structure.
Four current unit mimo antenna, have the antenna of employing 4 same units to pass through to embed decoupling structure on floor thus the effect reaching high-isolation.Antenna is printed on PCB double sided board, and four identical element antennas are placed on four corners of PCB by the form of being put up and down by left and right.Antenna promotes the isolation between antenna element by embedding 3 gap decoupling cells on floor.In the program, antenna puts spacing comparatively greatly, and structure is compact not and decoupling structure complicated.
Also the slot antenna of employing four same units is had by loading short circuit minor matters thus reaching double-frequency resonance effect.Antenna is printed on PCB double sided board, and four slot antennas mutually vertically put by four are placed on four limits of PCB.Antenna forms new resonance frequency by loading short circuit minor matters thus reaches double frequency effect simultaneously.In this antenna scheme, antenna adopts slot antenna form, and the size needed for slot antenna is comparatively large, is greater than 1/2 wavelength, and four antennas put spacing comparatively greatly, are unfavorable for antenna miniaturization.Simultaneously slot antenna to PCB and gap size more responsive, slight change will have a strong impact on the performance of antenna, and consistency is poor, affect the production in enormous quantities of antenna.
Utility model content
The utility model object is to provide a kind of miniaturized four unit double frequency mimo antenna, be intended to solve existing double frequency mimo antenna exist need to add uncoupling, EBG structure, cracking etc. reduces the problem of coupling.
The utility model provides a kind of miniaturized four unit double frequency mimo antenna, be arranged at a surface of medium substrate, comprise the first antenna element, the second antenna element, third antenna unit and the 4th antenna element, described first antenna element and the second antenna element are the PIFA antenna being symmetricly set in relative both sides, described surface; Described third antenna unit is loop aerial, and described second antenna element couples and is arranged between described first antenna element and the second antenna element; Described 4th antenna element is vertical polarized antenna, is arranged at described surface, is positioned on the symmetry axis extended line direction of described first antenna element and described second antenna element.
Preferably, described first antenna element comprises the first radiant body, the second radiant body, the 3rd radiant body and earth electrode, wherein:
Described first radiant body, for establishing slotted rectangular configuration, is coupled by the feed line of a bending type and described second radiant body;
Described second radiant body is trapezium structure, and its hypotenuse is relative with described first radiant body, and the right-angle side relative with this hypotenuse is coupled by described feed line and described first radiant body, is provided with distributing point near the base of described third antenna unit side;
Described 3rd radiant body is linear structure, and one end is vertical with the right-angle side of described second radiant body to be coupled;
Earth electrode is coupled by an earth connection and described feed line, and described earth connection is parallel relative with described 3rd radiant body.
Preferably, the fluting on described first radiant body is inverted "L" shaped, and described fluting is inwardly offered by the edge of described first radiant body.
Preferably the wiring path length of the wiring path length of described first radiant body and described 3rd radiant body is all corresponding with the quarter-wave presetting the first antenna frequencies.
Preferably, described third antenna unit comprises the first Department of Radiation, the second Department of Radiation and the 3rd Department of Radiation, wherein:
Described first Department of Radiation is open annular structure, and one end and described second antenna element couple, and one end of the other end and described second Department of Radiation couples;
Described second Department of Radiation is bending type, is arranged at the side of described first Department of Radiation away from described 4th antenna element;
Described 3rd Department of Radiation is bending type, misplaces relative with described second Department of Radiation, and the middle part of one end and described second Department of Radiation couples, and described 3rd Department of Radiation and the described second Department of Radiation place of coupling are provided with distributing point.
Preferably, described second Department of Radiation is in " L " type; Described 3rd Department of Radiation is inverted "L" shaped.
Preferably, the wiring path length of described 3rd Department of Radiation is corresponding with the quarter-wave presetting the second antenna frequencies.
Preferably, the wiring path length of described first Department of Radiation is corresponding with 1/2nd wavelength presetting the first antenna frequencies.
Preferably, described 4th antenna element comprises the radiating element of two specular, and the symmetry axis of its symmetry axis and described first antenna element and the second antenna element is parallel to each other; Described radiating element is " G " type structure.
Preferably, described radiating element comprises:
First radiant section is " C " type structure, and wiring path length is corresponding with the quarter-wave presetting the first antenna frequencies;
Second radiant section, wiring path length is corresponding with the quarter-wave presetting the second antenna frequencies.
Above-mentioned double frequency mimo antenna is by the PIFA antenna of employing two similar horizontal polarizations, loop aerial and vertical polarized antenna, by appropriate disposing way reach increase antenna element interval from, promote that the mode of isolation need not add any uncoupling, EBG structure, cracking etc. reduces the method for coupling.
Accompanying drawing explanation
Fig. 1 is the structural representation of the utility model preferred embodiment miniaturization four unit double frequency mimo antenna;
The S parameter curve chart of the first frequency range four element antennas that Fig. 2 A is the mimo antenna of double frequency shown in Fig. 1;
The S parameter curve chart of the second frequency range four element antennas that Fig. 2 B is the mimo antenna of double frequency shown in Fig. 1;
Isolation curve chart between the first frequency range four element antennas that Fig. 3 A is the mimo antenna of double frequency shown in Fig. 1;
Isolation curve chart between the second frequency range four element antennas that Fig. 3 B is the mimo antenna of double frequency shown in Fig. 1.
Embodiment
In order to make the technical problems to be solved in the utility model, technical scheme and beneficial effect clearly understand, below in conjunction with drawings and Examples, the utility model is further elaborated.Should be appreciated that specific embodiment described herein only in order to explain the utility model, and be not used in restriction the utility model.
Refer to Fig. 1, the utility model preferred embodiment miniaturization four unit double frequency mimo antenna, the first antenna frequencies: 2.4 ~ 2.5GHz, second antenna frequencies 5.15 ~ 5.85GHz.But be not limited thereto frequency range, the technical staff being familiar with antenna can convert antenna size in proportion according to the wavelength of different frequency range, thus obtains the antenna of different frequency range.Double frequency mimo antenna is arranged at a surface of medium substrate 10, comprises the first antenna element 11, second antenna element 12, third antenna unit 13 and the 4th antenna element 14.
In the present embodiment, the long limit of medium substrate 10 is about 7/12 wavelength of the first antenna frequencies, and broadside is about 1/4 wavelength of the first antenna frequencies.Medium substrate 10 material can be the conventional material such as FR4, FR1, PTFE, CEM1, but is not limited to these materials.
First antenna element 11 and the second antenna element 12 are for being symmetricly set in the PIFA antenna of relative both sides, surface.First antenna element 11 (with the second antenna element 12) comprises the first radiant body 110, second radiant body 112, the 3rd radiant body 114 and earth electrode 116.
First radiant body 110, for being provided with the rectangular configuration of fluting 111, is coupled by the feed line 113 of a bending type and the second radiant body 112; Second radiant body 112 is ladder structure of right angle, and its hypotenuse is relative with the first radiant body 110, and the right-angle side relative with this hypotenuse is coupled by feed line 113 and the first radiant body 110, is provided with distributing point 115 near the base of third antenna unit 13 side; 3rd radiant body 114 is linear structure, and one end is vertical with the right-angle side of the second radiant body 112 to be coupled, and the other end is free end; Earth electrode 116 is coupled with feed line 113 by an earth connection 117, and earth connection 117 is parallel relative with the 3rd radiant body 114, and earth electrode 116 and earth connection 117 are coupled to mutually in " L " type structure.
Preferably, the fluting 111 on the first radiant body 110 is in inverted "L" shaped, and fluting 111 is inwardly offered by the edge of the first radiant body 110.The wiring path length of the first radiant body 110 and the wiring path length of the 3rd radiant body 114 are all corresponding with the quarter-wave presetting the first antenna frequencies.In first antenna element 11 1 afterbody the first radiant body 110 on make its size appropriate through fluting 111 1/4 wavelength being adjusted to the first antenna frequencies, thus the resonance effect of effective adjustment antenna band one, by 111 effective dimensions reducing antenna of slotting.As shown in Figure 2 A and 2 B, wherein, S11, S22, S33, S44 represent the S parameter of first, second, third and fourth antenna element to antenna S parameter figure respectively.
Third antenna unit 13 is double frequency loop aerial, couples with the second antenna element 12, and is arranged between the first antenna element 11 and the second antenna element 12.
Third antenna unit 13 comprises the first Department of Radiation 130, second Department of Radiation 131 and the 3rd Department of Radiation 132.First Department of Radiation 130 is open annular structure, and one end and the second antenna element 12 couple, and specifically couple with the feed line 113 of the second antenna element 12 or earth connection 117, one end of the other end and the second Department of Radiation 131 couples; Second Department of Radiation 131, in bending type, is arranged at the side of the first Department of Radiation 130 away from the 4th antenna element 14; 3rd Department of Radiation 132 is in bending type, and misplace relative with the second Department of Radiation 131, and the middle part of one end and the second Department of Radiation 131 couples, the 3rd Department of Radiation 132 and the second Department of Radiation 131 place of coupling are provided with distributing point 133.
Second Department of Radiation 131 is in " L " type; 3rd Department of Radiation 132 is in inverted "L" shaped.The wiring path length of the 3rd Department of Radiation 132 is corresponding with the quarter-wave presetting the second antenna frequencies.The wiring path length of the first Department of Radiation 130 is corresponding with 1/2nd wavelength presetting the first antenna frequencies.
4th antenna element 14 is the double frequency dipole antenna of perpendicular polarization, is understandable that, the 4th antenna element 14 adopts the antenna form of perpendicular polarization, is not limited to adopt dipole form.4th antenna element 14 is arranged at surface, is positioned on the symmetry axis extended line direction of the first antenna element 11 and the second antenna element 12.
4th antenna element 14 comprises the radiating element 140 of two specular, and the symmetry axis of its symmetry axis and the first antenna element 11 and the second antenna element 12 is parallel to each other; Radiating element 140 is " G " type structure.
Particularly, radiating element 140 comprises the first radiant section 142 and the second radiant section 144.First radiant section 142 is " C " type structure, and wiring path length is corresponding with the quarter-wave presetting the first antenna frequencies; Second radiant section 144 is connected with one end of the first radiant section 142, is contained in the first radiant section 142, and its wiring path length is corresponding with the quarter-wave presetting the second antenna frequencies.
4th antenna element 14 adopts perpendicular polarization mode dipole antenna, the effective isolation promoted between antenna element, and is effectively reduced the size of antenna by meandered antenna radiating element 140.
Four antenna adopt the dipole antenna of the PIFA antenna of two similar horizontal polarizations, loop aerial and perpendicular polarization to put through appropriate, what four antennas made were compact is placed in long is frequency range 1 wavelength, broadside is about on the dielectric-slab of 1/4 wavelength of frequency range one, and isolation between antennae all reaches more than 12dBi.Four antenna element interval from degree as shown in Figure 3 A and Figure 3 B, wherein, curve S 12, S13, S14, S23, S24, S34 represent the first antenna element 11 and the second antenna element 12, first antenna element 11 and third antenna unit 13, first antenna element 11 and the 4th antenna element 14, second antenna element 12 and third antenna unit 13, second antenna element 12 and the 4th antenna element 14, isolation between third antenna unit 13 and the 4th antenna element 14 respectively.
Third antenna unit 13 structure adopts loop aerial version to be placed between the first antenna element 11 and the second antenna element 12, effectively reduces the size of antenna.The dipole antenna of the PIFA antenna of two similar horizontal polarizations, loop aerial and perpendicular polarization in four antenna elements, wherein the Research of Antenna Polarization and loop antenna version thereof are the keys realizing high-isolation in the program.The appropriate disposing way of four antenna elements is placed in the middle of the PIFA antenna of two horizontal polarizations by loop aerial, reduce the isolation of two PIFA antennas preferably.Promote that the mode of isolation need not add any uncoupling, EBG structure, cracking etc. reduces the method for coupling.
The foregoing is only preferred embodiment of the present utility model; not in order to limit the utility model; all do within spirit of the present utility model and principle any amendment, equivalent to replace and improvement etc., all should be included within protection range of the present utility model.
Claims (10)
1. a miniaturization four unit double frequency mimo antenna, be arranged at a surface of medium substrate, it is characterized in that, comprise the first antenna element, the second antenna element, third antenna unit and the 4th antenna element, described first antenna element and the second antenna element are the PIFA antenna being symmetricly set in relative both sides, described surface; Described third antenna unit is loop aerial, and described second antenna element couples and is arranged between described first antenna element and the second antenna element; Described 4th antenna element is vertical polarized antenna, is arranged at described surface, is positioned on the symmetry axis extended line direction of described first antenna element and described second antenna element.
2. miniaturized four unit double frequency mimo antenna as claimed in claim 1, it is characterized in that, described first antenna element comprises the first radiant body, the second radiant body, the 3rd radiant body and earth electrode, wherein:
Described first radiant body, for establishing slotted rectangular configuration, is coupled by the feed line of a bending type and described second radiant body;
Described second radiant body is trapezium structure, and its hypotenuse is relative with described first radiant body, and the right-angle side relative with this hypotenuse is coupled by described feed line and described first radiant body, is provided with distributing point near the base of described third antenna unit side;
Described 3rd radiant body is linear structure, and one end is vertical with the right-angle side of described second radiant body to be coupled;
Earth electrode is coupled by an earth connection and described feed line, and described earth connection is parallel relative with described 3rd radiant body.
3. miniaturized four unit double frequency mimo antenna as claimed in claim 2, it is characterized in that, the fluting on described first radiant body is inverted "L" shaped, and described fluting is inwardly offered by the edge of described first radiant body.
4. miniaturized four unit double frequency mimo antenna as claimed in claim 2, is characterized in that, the wiring path length of described first radiant body and the wiring path length of described 3rd radiant body are all corresponding with the quarter-wave presetting the first antenna frequencies.
5. miniaturized four unit double frequency mimo antenna as claimed in claim 1, it is characterized in that, described third antenna unit comprises the first Department of Radiation, the second Department of Radiation and the 3rd Department of Radiation, wherein:
Described first Department of Radiation is open annular structure, and one end and described second antenna element couple, and one end of the other end and described second Department of Radiation couples;
Described second Department of Radiation is bending type, is arranged at the side of described first Department of Radiation away from described 4th antenna element;
Described 3rd Department of Radiation is bending type, misplaces relative with described second Department of Radiation, and the middle part of one end and described second Department of Radiation couples, and described 3rd Department of Radiation and the described second Department of Radiation place of coupling are provided with distributing point.
6. miniaturized four unit double frequency mimo antenna as claimed in claim 5, is characterized in that, described second Department of Radiation is in " L " type; Described 3rd Department of Radiation is inverted "L" shaped.
7. miniaturized four unit double frequency mimo antenna as claimed in claim 5, is characterized in that, the wiring path length of described 3rd Department of Radiation is corresponding with the quarter-wave presetting the second antenna frequencies.
8. miniaturized four unit double frequency mimo antenna as claimed in claim 5, is characterized in that, the wiring path length of described first Department of Radiation is corresponding with 1/2nd wavelength presetting the first antenna frequencies.
9. miniaturized four unit double frequency mimo antenna as claimed in claim 1, it is characterized in that, described 4th antenna element comprises the radiating element of two specular, and the symmetry axis of its symmetry axis and described first antenna element and the second antenna element is parallel to each other; Described radiating element is " G " type structure.
10. miniaturized four unit double frequency mimo antenna as claimed in claim 9, it is characterized in that, described radiating element comprises:
First radiant section is " C " type structure, and wiring path length is corresponding with the quarter-wave presetting the first antenna frequencies;
Second radiant section, wiring path length is corresponding with the quarter-wave presetting the second antenna frequencies.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520845356.5U CN205122754U (en) | 2015-10-28 | 2015-10-28 | Four miniaturized unit dual -frenquency MIMO antennas |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520845356.5U CN205122754U (en) | 2015-10-28 | 2015-10-28 | Four miniaturized unit dual -frenquency MIMO antennas |
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| CN205122754U true CN205122754U (en) | 2016-03-30 |
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| CN201520845356.5U Active CN205122754U (en) | 2015-10-28 | 2015-10-28 | Four miniaturized unit dual -frenquency MIMO antennas |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107706507A (en) * | 2016-06-21 | 2018-02-16 | 智易科技股份有限公司 | Dual-band antenna |
| CN108923110A (en) * | 2018-08-21 | 2018-11-30 | 中电科航空电子有限公司 | A kind of MIMO airborne antenna using WiFi and LTE |
| CN110854523A (en) * | 2019-11-28 | 2020-02-28 | 歌尔科技有限公司 | Electronic equipment and antenna system thereof |
| CN114976598A (en) * | 2022-06-01 | 2022-08-30 | 西安电子科技大学 | High-isolation inverted-L-shaped antenna pair applied to zero-clearance mobile terminal |
-
2015
- 2015-10-28 CN CN201520845356.5U patent/CN205122754U/en active Active
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107706507A (en) * | 2016-06-21 | 2018-02-16 | 智易科技股份有限公司 | Dual-band antenna |
| CN108923110A (en) * | 2018-08-21 | 2018-11-30 | 中电科航空电子有限公司 | A kind of MIMO airborne antenna using WiFi and LTE |
| CN108923110B (en) * | 2018-08-21 | 2024-04-09 | 中电科航空电子有限公司 | MIMO (multiple input multiple output) airborne antenna adopting WiFi and LTE (Long term evolution) |
| CN110854523A (en) * | 2019-11-28 | 2020-02-28 | 歌尔科技有限公司 | Electronic equipment and antenna system thereof |
| CN110854523B (en) * | 2019-11-28 | 2021-12-31 | 歌尔科技有限公司 | Electronic equipment and antenna system thereof |
| CN114976598A (en) * | 2022-06-01 | 2022-08-30 | 西安电子科技大学 | High-isolation inverted-L-shaped antenna pair applied to zero-clearance mobile terminal |
| CN114976598B (en) * | 2022-06-01 | 2023-10-31 | 西安电子科技大学 | High-isolation inverted L-shaped antenna pair applied to zero-headroom mobile terminal |
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