CN204375960U - A kind of four port mimo antenna with high-isolation - Google Patents
A kind of four port mimo antenna with high-isolation Download PDFInfo
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- CN204375960U CN204375960U CN201420805773.2U CN201420805773U CN204375960U CN 204375960 U CN204375960 U CN 204375960U CN 201420805773 U CN201420805773 U CN 201420805773U CN 204375960 U CN204375960 U CN 204375960U
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- mimo antenna
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Abstract
The utility model relates to a kind of four port mimo antenna with high-isolation, and it comprises grounding plate (1), medium substrate (2), four antenna radiation units (3), four quarter wavelength impedance transducers (4), four 50 Ω microstrip feed lines (5) and four metal patches (6).This mimo antenna has four antenna elements, and resonance frequency is 5.2GHz, and the minimum distance of adjacent two antenna elements is only 4.75mm, and be about 0.082 times of free space wavelength corresponding to resonance frequency, compact conformation, volume is little.Under the prerequisite not increasing antenna size, utilize perpendicular polarization technology and increase the method for extra coupling path, make the degree of coupling between each antenna element all below-19.5dB, isolation is high.The utility model is expected to be widely used at wireless communication technology field.
Description
Technical field
The utility model relates to wireless communication technology field, and particularly a kind of volume is little, compact conformation, cost are low, have four port mimo antenna of high-isolation, and the resonance frequency of this mimo antenna is 5.2GHz.
Background technology
Along with the fast development of wireless communication technology, require that communication equipment wants miniaturized and portability.In actual applications, owing to being subject to receiver or transmitter size and structural limitations, need to arrange antenna element as much as possible in the confined space.According to the designing requirement of mimo antenna, will have higher isolation between each antenna element, namely the degree of coupling is low.If the space of Wireless Telecom Equipment is sufficient, as long as by increasing the distance between antenna element, make spacing be greater than 1/2nd wavelength, just can be good at reducing the degree of coupling between antenna.But for the Wireless Telecom Equipment of miniaturization, in the uncontrollable scope being not less than 1/2nd wavelength of the distance between each antenna element, the degree of coupling between each antenna element can be very large, thus cause the reduction of systematic function.Therefore, at limited space, and design multiport mimo antenna under ensureing the prerequisite of low cost, high-isolation, there is very large challenge.
At present, Chinese scholars has proposed many mimo antenna mentalities of designing, but still can not meet the designing requirement of Modern wireless communication equipment, hinders the development process of wireless communication technology to a certain extent.Such as, mimo antenna designed in Chinese patent CN102714353A, only has two ports, could not, in limited space, under ensureing the prerequisite of high-isolation, place more antenna, and volume be still larger.
Utility model content
The purpose of this utility model is to provide that a kind of volume is little, compact conformation, cost are low, have four port mimo antenna of high-isolation, and the resonance frequency of this mimo antenna is 5.2GHz, and the degree of coupling between each antenna element is below-19.5dB.
The technical scheme that the utility model adopts:
A kind of four port mimo antenna with high-isolation, it is characterized in that: comprise grounding plate (1), medium substrate (2), four antenna radiation units (3), four quarter wavelength impedance transducers (4), four 50 Ω microstrip feed lines (5) and four metal patches (6), grounding plate (1) lower surface in medium substrate (2), four antenna radiation units (3), four quarter wavelength impedance transducers (4), four 50 Ω microstrip feed lines (5) and the upper surface of four metal patches (6) in medium substrate (2).
Described a kind of four port mimo antenna with high-isolation, is characterized in that: four antenna radiation units (3) are rectangular patch antenna.
Described a kind of four port mimo antenna with high-isolation, it is characterized in that: the both sides of each quarter wavelength impedance transducer (4) are connected with 50 Ω microstrip feed lines (5) with an antenna radiation unit (3) respectively, form an antenna element, four antenna elements are vertically placed mutually.
Described a kind of four port mimo antenna with high-isolation, is characterized in that: the shape of four metal patches (6) is rectangle.
Advantage of the present utility model is:
(1) have four antenna elements in mimo antenna, below the degree of coupling-19.5dB between each antenna element, operating efficiency is high, and compared to the mimo antenna of other Unit two or Unit three, can better improve channel capacity.
In (2) four antenna elements, the minimum distance of two adjacent antennas is only 4.75mm, and be about 0.082 times of free space wavelength corresponding to resonance frequency 5.2GH, compact conformation, volume is little.
(3) grounding plate, antenna radiation unit, quarter wavelength impedance transducer, 50 Ω microstrip feed lines and metal patch select copper foil material, medium substrate selects TP2 material, and this bi-material market is common, and price is low, make mimo antenna cost low, be easy to processing.
Accompanying drawing explanation
Fig. 1 is a kind of front view with four port mimo antenna of high-isolation described in the utility model;
Fig. 2 is a kind of S with four port mimo antenna of high-isolation described in the utility model
1,1, S
2,1, S
3,1and S
4,1characteristic curve;
Embodiment
Have four port mimo antenna of high-isolation, as shown in Figure 1, each antenna element is vertically placed mutually, and between antenna element, placed rectangular metal paster (6).The vertical placement of antenna element can utilize perpendicular polarization technology to suppress near-field coupling, and metal patch (6) can provide extra coupling path to offset the original couple current of non-actuated antenna element, thus improves the isolation between each antenna element.
Medium substrate (2) selects TP2 material, and dielectric constant is 4.3, and thickness is H, and the length of side is L.The whole lower surface of grounding plate (1) overwrite media substrate (2).
Four antenna radiation units (3) are rectangular patch antenna, long and be widely respectively L1 and W1, distance between adjacent antenna radiating element (3) is S1, and four antenna radiation units (3) are S2 apart from the distance at nearer medium substrate (2) edge.
The length of four quarter wavelength impedance transducers (4) and be widely respectively L2 and W2, the both sides of each quarter wavelength impedance transducer (4) are connected with 50 Ω microstrip feed lines (5) with an antenna radiation unit (3) respectively, form an antenna element, the length of four 50 Ω microstrip feed lines (5) and be widely respectively L3 and W3.Quarter wavelength impedance transducer (4) plays the effect of impedance matching.
The length of four metal patches (6) and be widely respectively L4 and W4, each metal patch (6) is between adjacent two antenna elements, and the distance apart from nearer metal patch (6) is S3.
As shown in Figure 1, the concrete structure of this mimo antenna is of a size of: H=1.8mm, L=64mm, L1=12.2mm, W1=17.5mm, L2=11mm, W2=0.4mm, L3=9.8mm, W3=0.4mm, L4=24mm, W4=0.5mm, S1=4.75mm, S2=8.75mm, S3=1.25mm.
Due to the symmetrical configuration of this mimo antenna, only to the S of an antenna element in Fig. 2
1,1, S
2,1, S
3,1and S
4,1characteristic curve is described, the characteristic curve of its excess-three antenna element, S
2,2, S
3,3, S
4,4with S
1,1identical, S
3,2, S
4,3, S
isosorbide-5-Nitraewith S
2,1identical, S
4,2, S
1,3, S
2,4with S
3,1identical, S
1,2, S
2,3, S
3,4with S
4,1identical.As shown in Figure 2, the resonance frequency of this mimo antenna is 5.2GHz, and bandwidth is 180MHz, and in whole bandwidth, the degree of coupling between each antenna element, all below-19.5dB, has very high isolation.
Claims (4)
1. one kind has four port mimo antenna of high-isolation, it is characterized in that: comprise grounding plate (1), medium substrate (2), four antenna radiation units (3), four quarter wavelength impedance transducers (4), four 50 Ω microstrip feed lines (5) and four metal patches (6), grounding plate (1) lower surface in medium substrate (2), four antenna radiation units (3), four quarter wavelength impedance transducers (4), four 50 Ω microstrip feed lines (5) and the upper surface of four metal patches (6) in medium substrate (2).
2. a kind of four port mimo antenna with high-isolation according to claim 1, is characterized in that: four antenna radiation units (3) are rectangular patch antenna.
3. a kind of four port mimo antenna with high-isolation according to claim 1, it is characterized in that: the both sides of each quarter wavelength impedance transducer (4) are connected with 50 Ω microstrip feed lines (5) with an antenna radiation unit (3) respectively, form an antenna element, four antenna elements are vertically placed mutually.
4. a kind of four port mimo antenna with high-isolation according to claim 1, is characterized in that: the shape of four metal patches (6) is rectangle.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420805773.2U CN204375960U (en) | 2014-12-18 | 2014-12-18 | A kind of four port mimo antenna with high-isolation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420805773.2U CN204375960U (en) | 2014-12-18 | 2014-12-18 | A kind of four port mimo antenna with high-isolation |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204375960U true CN204375960U (en) | 2015-06-03 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420805773.2U Expired - Fee Related CN204375960U (en) | 2014-12-18 | 2014-12-18 | A kind of four port mimo antenna with high-isolation |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN106816703A (en) * | 2017-01-17 | 2017-06-09 | 厦门大学 | A kind of quaternary UWB mimo antennas of utilization coplanar wave guide feedback |
| WO2017219490A1 (en) * | 2016-06-24 | 2017-12-28 | Huawei Technologies Co., Ltd. | A low coupling full-duplex mimo antenna array with coupled signal cancelling |
| CN108767453A (en) * | 2018-04-26 | 2018-11-06 | 西安电子科技大学 | A kind of flexibility ultra wide band mimo antenna |
| CN109449594A (en) * | 2018-10-26 | 2019-03-08 | 钟祥博谦信息科技有限公司 | Microstrip antenna |
| CN110112584A (en) * | 2019-04-17 | 2019-08-09 | 烽火通信科技股份有限公司 | A kind of compact type high-isolation mimo antenna |
-
2014
- 2014-12-18 CN CN201420805773.2U patent/CN204375960U/en not_active Expired - Fee Related
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2017219490A1 (en) * | 2016-06-24 | 2017-12-28 | Huawei Technologies Co., Ltd. | A low coupling full-duplex mimo antenna array with coupled signal cancelling |
| US10008782B2 (en) | 2016-06-24 | 2018-06-26 | Huawei Technologies Co., Ltd. | Low coupling full-duplex MIMO antenna array with coupled signal cancelling |
| 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 |
| CN106816703A (en) * | 2017-01-17 | 2017-06-09 | 厦门大学 | A kind of quaternary UWB mimo antennas of utilization coplanar wave guide feedback |
| CN106816703B (en) * | 2017-01-17 | 2019-02-22 | 厦门大学 | A kind of quaternary UWB-MIMO antenna using coplanar wave guide feedback |
| CN108767453A (en) * | 2018-04-26 | 2018-11-06 | 西安电子科技大学 | A kind of flexibility ultra wide band mimo antenna |
| CN109449594A (en) * | 2018-10-26 | 2019-03-08 | 钟祥博谦信息科技有限公司 | Microstrip antenna |
| CN110112584A (en) * | 2019-04-17 | 2019-08-09 | 烽火通信科技股份有限公司 | A kind of compact type high-isolation mimo antenna |
| CN110112584B (en) * | 2019-04-17 | 2021-07-20 | 烽火通信科技股份有限公司 | Compact high-isolation MIMO antenna |
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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: 20150603 Termination date: 20151218 |
|
| EXPY | Termination of patent right or utility model |