CN210272674U - Antenna pair and MIMO antenna system - Google Patents
Antenna pair and MIMO antenna system Download PDFInfo
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- CN210272674U CN210272674U CN201921290600.0U CN201921290600U CN210272674U CN 210272674 U CN210272674 U CN 210272674U CN 201921290600 U CN201921290600 U CN 201921290600U CN 210272674 U CN210272674 U CN 210272674U
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Abstract
The utility model provides an antenna is to reaching MIMO antenna system, this antenna is to including dielectric-slab, first antenna and second antenna, first antenna with the second antenna is located the homonymy of dielectric-slab, first antenna includes two first metal sections, and connects two the second metal section of first metal section, the second antenna includes third metal section, two first metal section the equal parallel arrangement of third metal section, two are located to the third metal section between the first metal section. The utility model provides an antenna is to reaching MIMO antenna system, the galvanic couple of two first metal sections during to the third metal section, the electric current offsets each other, makes two galvanic couples after to the third metal section from neutralization, under the nearer condition of first antenna and second antenna distance, also can guarantee better port isolation between first antenna and the second antenna under the less condition of size promptly for the antenna.
Description
Technical Field
The utility model belongs to the technical field of the antenna, more specifically say, relate to an antenna is to reaching MIMO antenna system.
Background
In order to increase the channel capacity of a mobile communication system, the use of MIMO antennas (MIMO means multiple input multiple output) is a necessary trend. The MIMO antenna is sometimes referred to as a spatial diversity technique because it transmits and receives data using multiple spatial channels, and the capacity of a channel can be increased using the MIMO technique. However, the volume of the terminal antenna is limited, multiple antennas are inevitably needed to realize the MIMO antenna, and in order to reduce the interference between the antennas, a larger distance between each antenna needs to be ensured, so that the overall size of the MIMO antenna system is larger, but when the antennas are closer, the antenna units interfere with each other, the isolation between each antenna unit needs to be optimized, and the requirement of high isolation cannot be met.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide an antenna is right to solve the too big, lower technical problem of isolation of the MIMO antenna system overall dimension that exists among the prior art.
In order to achieve the above object, the utility model adopts the following technical scheme: the utility model provides an antenna pair, includes dielectric-slab, first antenna and second antenna, first antenna with the second antenna is located the homonymy of dielectric-slab, first antenna includes two first metal sections, and connects two the second metal section of first metal section, the second antenna includes third metal section, two first metal section the equal parallel arrangement of third metal section, the third metal section is located two between the first metal section, make two current coupling on the first metal section extremely when the third metal section, two the electric current of first metal section offsets each other.
Further, the third metal segment is equidistant from the two first metal segments.
Further, the lengths of the two first metal segments are the same.
Furthermore, the second antenna further comprises a fourth metal segment connected with the third metal segment, and the fourth metal segment extends back to the dielectric plate.
Furthermore, the first antenna is arranged symmetrically by taking the plane where the second antenna is located as a central plane.
Furthermore, the second metal section is semi-closed frame-shaped, the second metal section is provided with a head end and a tail end which are adjacently arranged, and the two first metal sections are respectively connected to the head end and the tail end of the second metal section.
Furthermore, one end of one of the first metal segments, which is close to the edge of the dielectric slab, is a feed point, and the width of the first metal segment is smaller than that of the other first metal segment.
Further, the first antenna is a loop antenna or a dipole antenna, and the second antenna is a monopole antenna.
The invention also provides a MIMO antenna system which comprises the high-isolation antenna pair.
Further, the MIMO antenna system further includes at least one pair of the first antennas.
The utility model provides an antenna is to reaching MIMO antenna system's beneficial effect lies in: compared with the prior art, the antenna pair of the utility model comprises a dielectric plate, a first antenna and a second antenna, wherein the first antenna and the second antenna are arranged at the same side of the dielectric plate, so that the antenna pair has simple structure, the first antenna comprises two first metal sections and a second metal section connecting the two first metal sections, the second antenna comprises a third metal section, the third metal section is arranged between the two first metal sections, and the two first metal sections and the third metal section are parallel to each other, when the first antenna works in a resonant mode of a wavelength, the current routing of the two first metal sections are opposite, and when the currents of the two first metal sections are coupled to the third metal section, the currents are mutually offset, so that the two currents are coupled to the third metal section and then are neutralized, and under the condition that the first antenna is close to the second antenna, namely, the antenna pair can also ensure better port isolation between the first antenna and the second antenna under the condition of smaller size.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for the embodiments or the prior art descriptions will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without inventive labor.
Fig. 1 is a schematic perspective view of an antenna pair according to an embodiment of the present invention;
fig. 2 is a front view of an antenna pair provided in an embodiment of the present invention;
fig. 3 is a schematic current direction diagram of an antenna pair according to an embodiment of the present invention;
fig. 4 is a simulation diagram of isolation of the antenna pair according to an embodiment of the present invention.
Wherein, in the figures, the respective reference numerals:
1-a dielectric plate; 2-a first antenna; 21-a first metal segment; 210-a feeding point of the first antenna; 22-a second metal segment; 3-a second antenna; 31-a third metal segment; 310-feeding point of the second antenna; 32-fourth metal segment.
Detailed Description
In order to make the technical problem, technical solution and advantageous effects to be solved by the present invention more clearly understood, the following description is given in conjunction with the accompanying drawings and embodiments to illustrate the present invention in further detail. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
It will be understood that when an element is referred to as being "secured to" or "disposed on" another element, it can be directly on the other element or be indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or be indirectly connected to the other element.
It will be understood that the terms "length," "width," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like are used in an orientation or positional relationship indicated in the drawings for convenience in describing the invention and to simplify the description, and are not intended to indicate or imply that the device or element so referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be construed as limiting the invention.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically limited otherwise.
With reference to fig. 1 to fig. 3, an antenna pair according to an embodiment of the present invention will be described. In one embodiment, the antenna pair includes a dielectric plate 1, a first antenna 2 and a second antenna 3, and the first antenna 2 and the second antenna 3 are disposed on the same side of the dielectric plate 1. The first antenna 2 includes two first metal segments 21 and a second metal segment 22, the two first metal segments 21 are parallel to each other, and both ends of the second metal segment 22 are connected to the two first metal segments 21, respectively. The second antenna 3 includes a third metal segment 31, the third metal segment 31 is disposed between the two first metal segments 21, and the third metal segment 31 is disposed in parallel with the first metal segments 21. When the first antenna 2 is fed by one of the first metal segments 21, the current in the first antenna 2 flows to one of the first metal segments 21, the second metal segment 22 and the other metal segment, and since the two first metal segments 21 are arranged in parallel, the current directions in the two first metal segments 21 are opposite, and then the two currents are mutually cancelled when the first antenna is coupled to the third metal segment 31, so that the influence on the second antenna 3 is reduced, and the isolation between the first antenna 2 and the second antenna 3 is improved.
The antenna pair in the above embodiment includes a dielectric plate 1, a first antenna 2 and a second antenna 3, the first antenna 2 and the second antenna 3 are disposed on the same side of the dielectric plate 1, so that the antenna pair has a simple structure, the first antenna 2 includes two first metal segments 21 and a second metal segment 22 connecting the two first metal segments 21, the second antenna 3 includes a third metal segment 31, the third metal segment 31 is disposed between the two first metal segments 21, and the two first metal segments 21 and the third metal segment 31 are parallel to each other, so that when the first antenna 2 operates in a resonant mode of one wavelength, current routing of the two first metal segments 21 are opposite, and when currents of the two first metal segments 21 are coupled to the third metal segment 31, the currents cancel each other, so that the two currents coupled to the third metal segment 31 are self-neutralized, and when the first antenna 2 and the second antenna 3 are closer to each other, i.e. a better port isolation between the first antenna 2 and the second antenna 3 is ensured even if the antenna pair is small in size.
Furthermore, one end of the first metal segment 21 extends to the edge of the dielectric plate 1, and two ends of the second metal segment 22 are respectively connected to the other end of the first metal segment 21. One end of one of the first metal segments 21 close to the dielectric plate 1 is a feeding point 210 of the first antenna 2, the first metal segment 21 is an AB segment, and the other first metal segment 21 is a CD segment. The end of the third metal segment 31 near the edge of the dielectric plate 1 is the feeding point 310 of the second antenna 3. As shown in fig. 3, where the current in the segment AB is IABThe current in the CD section is ICDWhen I isABAfter being coupled into the third metal segment 31, the current value is IAB’When I isCDAfter being coupled into the third metal segment 31, the current value is ICD’,IAB’And ICD’In the opposite direction, the current I in the third metal segment 3121=IAB’+ICD’=k1IAB+k2ICD. Wherein k is1The current coupling coefficient between the AB segment and the third metal segment 3141 in FIG. 3 is mainly related to the distance between the AB segment and the third metal segment 31 and the relative positions of the two metal branches, and k2Is the current coupling coefficient between the AB segment and the third metal segment 31 in FIG. 4, which isThe size is mainly related to the distance between the CD segment and the third metal segment 31 and the relative position of the CD segment and the third metal segment.
Referring to fig. 1 and fig. 2, in one embodiment, the third metal segment 31 is equidistant from the two first metal segments 21, so that the currents when the two first metal segments 21 are coupled into the third metal segment 31 are also substantially equal, and the influence of the two first metal segments 21 on the third metal segment 31 is counteracted as much as possible, thereby increasing the port isolation of the first antenna 2 and the second antenna. Of course, it is within the scope of the present invention that the distances between the two first metal segments 21 and the third metal segments 31 are substantially equal.
Referring to fig. 1 and 2, in one embodiment, the two first metal segments 21 have the same length. More specifically, one end of each of the two first metal segments 21 is disposed near the edge of the dielectric plate 1, and the other ends of the two first metal segments 21 are flush with each other. When the currents of the two first metal segments 21 are coupled to the third metal segment 31, and the current in each of the first metal segments 21 is coupled to the third metal segment 31, the other first metal segment 21 has a coupling current corresponding to the above-mentioned coupling current, so that the currents of each of the two first metal segments 21 can be cancelled out when coupled to the third metal segment 31. Of course, it is within the scope of the present invention for the lengths of the two first metal segments 21 to be substantially the same.
Optionally, the two first metal segments 21 differ in width. Illustratively, when the width of the AB segment is smaller than the width of the CD segment, the imbalance just offsets the slight imbalance caused by the loop antenna feed, which may result in better isolation of the overall loop antenna from the monopole antenna. As shown in FIG. 2, the width of the AB segment is 0.2mm, and the width of the CD segment is 0.4 mm. Exemplarily, when the sizes of the first antenna 2 and the second antenna 3 are as shown in fig. 2, the size unit is millimeter, and the length of the fourth metal segment 32 is 7mm, as shown in fig. 4, the simulation result is shown when the width of the AB segment is 0.2mm, and the width of the CD segment is 0.2mm, 0.4mm, and 0.6mm, respectively. Specifically, in fig. 4, the horizontal axis represents frequency, and the vertical axis represents isolation (dB) between the first antenna 2 and the second antenna 3, so that when the resonant frequency band of the antenna is 4.8GHz-5.0GHz, the isolation between the first antenna 2 and the second antenna 3 in the frequency band range is less than-18 dB, that is, the antenna pair has better port isolation. And the width of the CD segment is 0.4mm, the isolation between the first antenna 2 and the second antenna 3 may be-20 dB.
Referring to fig. 1, in one embodiment, the second antenna 3 further includes a fourth metal segment 32 connected to the third metal segment 31, and the fourth metal segment 32 is extended away from the dielectric plate 1. In this embodiment, the fourth metal segment 32 is suspended, so as to ensure that the radiation efficiency of the second antenna 3 is as high as possible. Further, the third antenna segment and the fourth antenna segment are connected perpendicularly or at an acute or obtuse angle, and are not limited herein.
Referring to fig. 2, in one embodiment, the second metal segment 22 is in a semi-closed frame shape, the second metal segment 22 has a head end and a tail end which are adjacently disposed, and the two first metal segments 21 are respectively connected to the head end and the tail end of the second metal segment 22. The first metal segment 21, the second metal segment 22 and the first metal segment 21 are connected in sequence, so that the direction of the current is the above-mentioned connection direction. One end of the first metal segment 21 close to the dielectric plate 1 is a feeding point 210.
Further, the first antenna 2 is a loop antenna or a dipole antenna, the second antenna 3 is a monopole antenna, and one loop antenna/one dipole antenna and one monopole antenna are an antenna pair. The patterns of the loop/dipole and monopole antennas are approximately orthogonal in terms of directional performance of the antenna. Therefore, although the first antenna 2 and the second antenna 3 are closer to each other, the ECC simulation value between the two antennas is less than 0.1, and a better spatial isolation is achieved.
Referring to fig. 1 and fig. 2, in one embodiment, the first antenna 2 is disposed symmetrically with respect to a plane where the second antenna 3 is located. In this way, the currents formed by feeding the first antenna 2 are also arranged in plane symmetry with the plane in which the second antenna 3 is located as the center, so that the currents coupled from the second metal segment 22 to the third metal segment 31 can cancel and neutralize each other, and the influence of the first antenna 2 on the second antenna 3 is eliminated as much as possible.
The utility model also provides a MIMO antenna system, MIMO antenna system includes the antenna pair in any embodiment of the aforesaid.
The utility model provides a MIMO antenna system has adopted the antenna in above-mentioned arbitrary embodiment to right, when the resonant mode of first antenna 2 work at a wavelength, two first metal section 21's electric current is walked the line conversely, two first metal section 21's electric current coupling is to the time of third metal section 31, the electric current offsets each other, make two electric current couplings to the third metal section 31 back from neutralization, under the nearer condition of first antenna 2 and second antenna 3 distance, also can guarantee better port isolation between first antenna 2 and the second antenna 3 under the less condition of size promptly.
Optionally, the MIMO antenna system comprises two antenna pairs, i.e. 4MIMO antennas; or, the MIMO antenna system includes two high-isolation antenna pairs and four first antennas 2, where one high-isolation antenna pair and two first antennas 2 are disposed on one side of the terminal housing, and the other high-isolation antenna pair and the remaining two first antennas 2 are disposed on the other side of the terminal housing. More specifically, one of the first antennas 2, the high-isolation antenna, and the other first antenna 2 are sequentially arranged on one side of the antenna system; or, the MIMO antenna system includes four antenna pairs and two first antennas 2, where two antenna pairs and one first antenna 2 are disposed on one side of the terminal housing, and the other two antenna pairs and the remaining one first antenna 2 are disposed on the other side of the terminal housing. More specifically, one of the antenna pairs, the first antenna 2 and the other antenna pair are arranged in sequence on one of the sides of the antenna system.
The above description is only exemplary of the present invention and should not be taken as limiting the scope of the present invention, as any modifications, equivalents, improvements and the like made within the spirit and principles of the present invention are intended to be included within the scope of the present invention.
Claims (10)
1. Antenna pair, its characterized in that: the antenna comprises a dielectric plate, a first antenna and a second antenna, wherein the first antenna and the second antenna are arranged on the same side of the dielectric plate, the first antenna comprises two first metal sections and a second metal section for connecting the two first metal sections, the second antenna comprises a third metal section and two first metal sections, the third metal sections are arranged in parallel, the third metal sections are arranged between the two first metal sections, and the two third metal sections are enabled to be coupled with currents on the first metal sections to offset the currents of the first metal sections.
2. An antenna pair according to claim 1, wherein: the third metal section is equidistant from the two first metal sections.
3. An antenna pair according to claim 1, wherein: the lengths of the two first metal sections are the same.
4. An antenna pair according to claim 1, wherein: the second antenna further comprises a fourth metal section connected with the third metal section, and the fourth metal section extends back to the dielectric plate.
5. An antenna pair according to claim 4, wherein: the first antenna is arranged symmetrically by taking the plane where the second antenna is located as a central plane.
6. An antenna pair according to claim 1, wherein: the second metal section is semi-closed frame form, just the second metal section has head end and tail end that adjacent setting, two first metal section connect respectively in the head end and the tail end of second metal section.
7. An antenna pair according to claim 1, wherein: one end of one of the first metal sections, which is close to the edge of the dielectric slab, is a feed point, and the width of the first metal section is smaller than that of the other first metal section.
8. An antenna pair according to any of claims 1-7, wherein: the first antenna is a loop antenna or a dipole antenna, and the second antenna is a monopole antenna.
A MIMO antenna system characterized by: comprising an antenna pair according to any of claims 1-8.
10. The MIMO antenna system of claim 9, wherein: the MIMO antenna system further includes at least one pair of first antennas.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201921290600.0U CN210272674U (en) | 2019-08-10 | 2019-08-10 | Antenna pair and MIMO antenna system |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201921290600.0U CN210272674U (en) | 2019-08-10 | 2019-08-10 | Antenna pair and MIMO antenna system |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112448163A (en) * | 2019-08-10 | 2021-03-05 | 深圳市卓睿通信技术有限公司 | High-isolation antenna pair and MIMO antenna system |
| CN113690587A (en) * | 2021-08-19 | 2021-11-23 | 昆山睿翔讯通通信技术有限公司 | Dual-frequency MIMO antenna assembly and mobile terminal |
| CN113764885A (en) * | 2020-06-05 | 2021-12-07 | 华为技术有限公司 | Electronic equipment |
-
2019
- 2019-08-10 CN CN201921290600.0U patent/CN210272674U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112448163A (en) * | 2019-08-10 | 2021-03-05 | 深圳市卓睿通信技术有限公司 | High-isolation antenna pair and MIMO antenna system |
| CN112448163B (en) * | 2019-08-10 | 2024-06-11 | 深圳市卓睿通信技术有限公司 | High-isolation antenna pair and MIMO antenna system |
| CN113764885A (en) * | 2020-06-05 | 2021-12-07 | 华为技术有限公司 | Electronic equipment |
| CN113690587A (en) * | 2021-08-19 | 2021-11-23 | 昆山睿翔讯通通信技术有限公司 | Dual-frequency MIMO antenna assembly and mobile terminal |
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