CN202423551U - Triangularly-arranged multiple input multiple output (MIMO) antenna - Google Patents
Triangularly-arranged multiple input multiple output (MIMO) antenna Download PDFInfo
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- CN202423551U CN202423551U CN2011205196265U CN201120519626U CN202423551U CN 202423551 U CN202423551 U CN 202423551U CN 2011205196265 U CN2011205196265 U CN 2011205196265U CN 201120519626 U CN201120519626 U CN 201120519626U CN 202423551 U CN202423551 U CN 202423551U
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Abstract
A triangularly-arranged multiple input multiple output (MIMO) antenna belongs to the technical field of communication. The MIMO antenna is composed of three plane linear polarization antennae to form an array and is in 120 degrees rotational symmetry with the array center as a symmetric point. The three plane linear polarization antennae share one regular triangular medium substrate, the three plane linear polarization antennae are triangularly arranged, namely connection lines of geometric centers of radiating elements of the three plane linear polarization antennae form a regular triangle, and an included angle of polarization directions of any two plane linear polarization antennae is 120 degrees. Each plane linear polarization antenna adopts the micro-strip feed, a feed port of each plane linear polarization antenna is located at a center point of the three sides of the regular triangular medium substrate, and earth plates of the plane linear polarization antennae are mutually independent. The triangularly-arranged MIMO antenna has good polarity diversity characters and port isolation, has good frequency and directional diagram stability, and further has the advantages of having low profile structures, being easy to manufacture and integrate and low in cost and the like.
Description
Technical field
The utility model belongs to communication technical field, relates to antenna technology, especially a kind of MIMO (Multiple-InputMultiple-Output, multiple-input and multiple-output) antenna.
Background technology
Radio communication is one of most active scientific research field in the world today.It has broken through the physical restriction of wire communication, makes the user freely to communicate in the place that any radio wave can arrive, and this has widened communication space and vigor greatly.The subject matter that present radio communication faces is the message transmission rate that how to provide higher.Because it is saturated that radio communication has been on the verge of so as to the traditional resource (frequency bandwidth and transmitting power) that improves transmission rate at present, it is impracticable therefore relying on these two kinds of resources of increase to improve transmission rate.3G (Third Generation) Moblie (3G) is comprising a plurality of national commercial application of China; But because still traditional wireless communication technology that 3G mainly adopts; The message transmission rate that can provide still is (384kbit/s-2Mbit/s) on the low side; Operator can't provide " killer " business and attract the user, and 3G uses in global large-scale commercial applications and has difficulty in taking a step.
In recent years; A kind of new wireless communication technology-MIMO (Multiple-Input Multiple-Output that frequency band and transmit power resource just can increase substantially message transmission rate that need not lose; Multiple-input and multiple-output)-caused widely and paid close attention to; The communication system of this employing space diversity reception to communicate is the antagonism wireless fading channel, improves a kind of effective ways of transport channel capacities.Mimo system can improve the availability of frequency spectrum greatly with respect to traditional a single aerial system, and the data service of higher rate can be transmitted in the system that makes under limited frequency band.At present, the MIMO technology has been regarded as the important component part of the 4th third-generation mobile communication technology (4G).
And, have advantages such as antijamming capability is strong, security performance good, transmitting power is little with the Ultra-wideband Communication Technology that the ultra-narrow pulse mode is carried out wireless transmit and reception.Its special character has been to be completely free of the traditional means that must adopt carrier modulation in the general wireless receiving and dispatching, become the wireless communication technology of direct control in the time domain, and it can obtain the benefit of broadband high-speed, low cost and low-power consumption simultaneously.
MIMO technology combines with Ultra-wideband Communication Technology, comprehensive both advantages, and it will play a significant role at aspects such as radar system, the communications field and military applications.
The MIMO antenna technology is one of main core technology of mimo wireless communication technology, and it is meant simultaneously adopts the complex array antenna at transmitting-receiving two-end.Under the condition that does not increase spectral bandwidth and transmitting power, use the multi-antenna diversity technology, improve the signal to noise ratio of emission or reception signal, to increase the capacity of system, this is the development trend of present wireless communication system.Yet, a plurality of antennas are integrated in the confined space, particularly for handheld device, can produce bigger mutual coupling, the performance of antenna just descends thereupon, just can't realize that channel capacity is along with the increase of number of antennas increases with linear scale.How reducing the aerial array size, the coupling that reduces simultaneously between antenna element is the difficult point of MIMO Antenna Design.
By people such as Zhang Haili " a kind of terminal MIMO antenna " (application number: application for a patent for invention 201020552203.9) has been proposed; Antenna is as shown in Figure 1; Comprise medium substrate; The front of its medium substrate is manufactured with three equilateral triangle radiating elements, and three radiating element distributions triangular in shape, constitutes the terminal MIMO antenna structure of triantennary cloth score of the game collection form; Said three triangle radiating elements respectively have a summit corresponding, and each radiating element base relative with its summit all parallel with a limit of medium substrate, are equipped with the pad that connects inner conductor on said three radiating elements.The antenna bottom is to apply the copper ground plate, and ground plate is divided into independently three parts, has improved interport isolation.This antenna is because size is bigger, and structure is asymmetric, has two unit polarised directions identical, can not make full use of the polarization diversity of antenna.
Summary of the invention
The utility model provides a kind of MIMO antenna of rounded projections arranged, and this MIMO antenna adopts super wide band plane single pole sub antenna or common microband antenna unit as radiating element, through the layout of rounded projections arranged, has improved the space diversity effect of MIMO antenna; Simultaneously, the polarised direction of three radiating elements is in twos 120 ° and intersects, and has improved the polarization diversity effect of MIMO antenna.Antenna bottom ground plate is divided into independently three parts, has improved interport isolation, can greatly improve system's receptivity.Characteristics such as this MIMO antenna also has low cross-section structure, is prone to processing, easy of integration and low cost.
The utility model technical scheme is following:
A kind of MIMO antenna of rounded projections arranged like Fig. 2, shown in 3, by three planar line poliarizing antenna forming arrays, and is that symmetric points are 120 ° of rotation symmetries with the array center; Three shared equilateral triangle dielectric substrates of planar line poliarizing antenna; The radiating element of three planar line poliarizing antennas and microstrip feed line are positioned at the front of equilateral triangle dielectric substrate, and the ground plate of three planar line poliarizing antennas is positioned at the back side of equilateral triangle dielectric substrate; Three planar line poliarizing antennas are triangularly arranged, and promptly the line of the geometric center of the radiating element of three planar line poliarizing antennas forms an equilateral triangle, and the angle between the polarised direction of any two planar line poliarizing antennas is 120 °; Each planar line poliarizing antenna adopts microstrip-fed, and its feed port is positioned at the central spot on three limits of equilateral triangle dielectric substrate; The ground plate of each planar line poliarizing antenna is separate.
In the technique scheme, said planar line poliarizing antenna can be plane single pole sub antenna or microstrip antenna.
The MIMO antenna of the rounded projections arranged that the utility model provides; In order to reduce the size of whole M IMO antenna; Under the situation that guarantees each antenna element operate as normal; On three angles of equilateral triangle dielectric substrate, all clipped the equilateral triangle of an identical size, made the shape of dielectric substrate become hexagon by equilateral triangle.
The MIMO antenna of the rounded projections arranged that the utility model provides; Can also comprise three sub-miniature A connectors; The inner wire of each sub-miniature A connector links to each other with the microstrip feed line of respective planes monopole antenna or microstrip antenna, and the outer conductor of each sub-miniature A connector links to each other with the ground plate of respective planes monopole antenna or microstrip antenna.
The beneficial effect of the utility model is:
The MIMO antenna of the rounded projections arranged that the utility model provides; Because three planar line poliarizing antenna unit of forming array are triangularly arranged; The polarised direction of any two planar line poliarizing antenna unit differs 120 °, makes whole M IMO antenna can obtain good polarization diversity characteristic; Simultaneously, it is far away that three antenna current feed ports are separated by, and adopts the ground plate that separates, thereby make whole M IMO antenna have good interport isolation; Antenna element is symmetrically distributed, and makes this MIMO antenna obtain omni-directional pattern preferably at the H face, and has good frequency and directional diagram stability.In addition, the MIMO antenna of the rounded projections arranged that provides of the utility model also have low cross-section structure, be prone to processing, characteristics such as easy of integration and low cost.
Description of drawings
Fig. 1 is the MIMO antenna structure view of existing a kind of rounded projections arranged (seeing Chinese patent " a kind of terminal MIMO antenna (application number: 201020552203.9) " for details).
The MIMO antenna structure view (vertical view) of the rounded projections arranged that Fig. 2 provides for the utility model.
The MIMO antenna structure view (end view) of the rounded projections arranged that Fig. 3 provides for the utility model.
Fig. 4 is the return loss (S11) of the utility model embodiment and the test result of isolation (S12).
Fig. 5 is the directional diagram test result of the utility model embodiment.Wherein (a) is E face directional diagram, (b) is H face directional diagram.
Embodiment
A kind of MIMO antenna of rounded projections arranged by three plane single pole sub antenna forming arrays, and is that symmetric points are 120 ° of rotation symmetries with the array center; Three shared equilateral triangle dielectric substrates of plane single pole sub antenna; The radiating element of three plane single pole sub antennas and microstrip feed line are positioned at the front of equilateral triangle dielectric substrate, and the ground plate of three plane single pole sub antennas is positioned at the back side of equilateral triangle dielectric substrate; Three plane single pole sub antennas are triangularly arranged, and promptly the line of the geometric center of the radiating element of three plane single pole sub antennas forms an equilateral triangle, and the angle between the polarised direction of any two plane single pole sub antennas is 120 °; Each plane single pole sub antenna adopts microstrip-fed, and its feed port is positioned at the central spot on three limits of equilateral triangle dielectric substrate; The ground plate of each plane single pole sub antenna is separate.An equilateral triangle of identical size is clipped at three angles of equilateral triangle dielectric substrate, makes the shape of dielectric substrate become hexagon by equilateral triangle.The MIMO antenna of said rounded projections arranged also comprises three sub-miniature A connectors; The inner wire of each sub-miniature A connector links to each other with the microstrip feed line of respective planes monopole antenna or microstrip antenna, and the outer conductor of each sub-miniature A connector links to each other with the ground plate of respective planes monopole antenna or microstrip antenna.
The vertical view of whole M IMO antenna is as shown in Figure 2, and end view is as shown in Figure 3, and wherein 1 is dielectric substrate; Thickness is 0.76mm; Dielectric constant is 2.94,3,4,6 to be the radiation patch and the microstrip feed line of dielectric substrate upper surface, and 2,5,7 is the ground plate of dielectric substrate lower surface.Radiation patch center distance d=40.00mm, hexagon minor face L1=47.02mm, the long limit L2=79.90mm of hexagon, lateral dimension W=123.00mm, longitudinal size H=107.32mm.
The utility model has made full use of the space diversity and the polarization diversity of antenna element; In very wide frequency band, can obtain good port return loss and isolation; As shown in Figure 4, because the symmetry of structure has only provided the return loss of port one and the isolation between port one and the port 2 here.In the 2.6GHz-12GHz scope, | S11|＜-10dB, | S12|＜-15dB.
The utility model can obtain the H face directional diagram and the E face directional diagram of 8 fonts that is similar to dipole of omnidirectional, and as shown in Figure 5, the directional diagram of this outside antenna is very little with frequency change, and excellent in stability is suitable in the ultra-wideband communications very much.
The MIMO antenna of the rounded projections arranged that the utility model provides, the antenna element structure that is triangularly arranged, and be that symmetrical centre is 120 ° of rotation symmetries with the array center; If whole M IMO antenna adopts super wide band plane single pole sub antenna as array element, then whole M IMO antenna also has the ultra broadband characteristic, and can obtain good coupling and stable directional diagram; Whole M IMO antenna is not limited to adopt ultra-wideband antenna as array element, and the flat plane antenna that also can adopt other form is as array element.
The utility model can be applied to aspects such as radio communication, satellite communication, as is applied on aircraft, naval vessel, the car-mounted device, and on the fixing or mobile terminal device of radio communication.
Claims (6)
1. the MIMO antenna of a rounded projections arranged by three planar line poliarizing antenna forming arrays, and is that symmetric points are 120 ° of rotation symmetries with the array center; Three shared equilateral triangle dielectric substrates of planar line poliarizing antenna; The radiating element of three planar line poliarizing antennas and microstrip feed line are positioned at the front of equilateral triangle dielectric substrate, and the ground plate of three planar line poliarizing antennas is positioned at the back side of equilateral triangle dielectric substrate; Three planar line poliarizing antennas are triangularly arranged, and promptly the line of the geometric center of the radiating element of three planar line poliarizing antennas forms an equilateral triangle, and the angle between the polarised direction of any two planar line poliarizing antennas is 120 °; Each planar line poliarizing antenna adopts microstrip-fed, and its feed port is positioned at the central spot on three limits of equilateral triangle dielectric substrate; The ground plate of each planar line poliarizing antenna is separate.
2. the MIMO antenna of rounded projections arranged according to claim 1 is characterized in that, said planar line poliarizing antenna is plane single pole sub antenna or microstrip antenna.
3. the MIMO antenna of rounded projections arranged according to claim 1 and 2 is characterized in that, an equilateral triangle of identical size is clipped at three angles of said equilateral triangle dielectric substrate, makes the shape of dielectric substrate become hexagon by equilateral triangle.
4. the MIMO antenna of rounded projections arranged according to claim 1; It is characterized in that; The MIMO antenna of said rounded projections arranged also comprises three sub-miniature A connectors; The inner wire of each sub-miniature A connector links to each other with the microstrip feed line of respective planes monopole antenna or microstrip antenna, and the outer conductor of each sub-miniature A connector links to each other with the ground plate of respective planes monopole antenna or microstrip antenna.
5. the MIMO antenna of rounded projections arranged according to claim 2; It is characterized in that; The MIMO antenna of said rounded projections arranged also comprises three sub-miniature A connectors; The inner wire of each sub-miniature A connector links to each other with the microstrip feed line of respective planes monopole antenna or microstrip antenna, and the outer conductor of each sub-miniature A connector links to each other with the ground plate of respective planes monopole antenna or microstrip antenna.
6. the MIMO antenna of rounded projections arranged according to claim 3; It is characterized in that; The MIMO antenna of said rounded projections arranged also comprises three sub-miniature A connectors; The inner wire of each sub-miniature A connector links to each other with the microstrip feed line of respective planes monopole antenna or microstrip antenna, and the outer conductor of each sub-miniature A connector links to each other with the ground plate of respective planes monopole antenna or microstrip antenna.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011205196265U CN202423551U (en) | 2011-12-14 | 2011-12-14 | Triangularly-arranged multiple input multiple output (MIMO) antenna |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011205196265U CN202423551U (en) | 2011-12-14 | 2011-12-14 | Triangularly-arranged multiple input multiple output (MIMO) antenna |
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| CN202423551U true CN202423551U (en) | 2012-09-05 |
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| CN2011205196265U Expired - Fee Related CN202423551U (en) | 2011-12-14 | 2011-12-14 | Triangularly-arranged multiple input multiple output (MIMO) antenna |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102496778A (en) * | 2011-12-14 | 2012-06-13 | 电子科技大学 | Triangularly-arranged multiple-input-multiple-output (MIMO) antenna |
| CN103730719A (en) * | 2013-12-18 | 2014-04-16 | 清华大学 | Small-size high-isolation three-unit MIMO antenna based on printed circuit board |
-
2011
- 2011-12-14 CN CN2011205196265U patent/CN202423551U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102496778A (en) * | 2011-12-14 | 2012-06-13 | 电子科技大学 | Triangularly-arranged multiple-input-multiple-output (MIMO) antenna |
| CN103730719A (en) * | 2013-12-18 | 2014-04-16 | 清华大学 | Small-size high-isolation three-unit MIMO antenna based on printed circuit board |
| CN103730719B (en) * | 2013-12-18 | 2015-08-19 | 清华大学 | A kind of height of the small size based on printed circuit board (PCB) isolation three unit multi-input/output antennas |
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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: 20120905 Termination date: 20141214 |
|
| EXPY | Termination of patent right or utility model |