CN201562752U

CN201562752U - mimo ceiling antenna

Info

Publication number: CN201562752U
Application number: CN2009202457849U
Authority: CN
Inventors: 曾召华
Original assignee: Xian University of Science and Technology
Current assignee: Xian University of Science and Technology
Priority date: 2009-12-15
Filing date: 2009-12-15
Publication date: 2010-08-25
Anticipated expiration: 2019-12-15

Abstract

The utility model relates to an MIMO ceiling antenna, which comprises a first radiation unit formed by a half-wave array, a second radiation unit formed by a second half-wave array, and a support rod used for fixing the first radiation unit and the second radiation unit. The first radiation unit is horizontally disposed, the second half-wave array of the second radiation unit is perpendicularly disposed on two sides of the first radiation unit, the upper ends of the first radiation unit and the second radiation unit are provided with a first grounding reflection board, the lower ends of the first radiation unit and the second radiation unit are provided with a second grounding reflection board, the second grounding reflection board is a round board or inverted conical board, and the second grounding reflection board has a size smaller than that of the first grounding reflection board. The MIMO ceiling antenna improves the radiation form a dual-polarized ceiling antenna, relatively simplifies the structure of the dual-polarized ceiling antenna, and relatively preferably meets requirement of indoor coverage.

Description

A kind of MIMO ceiling mount antenna

Technical field

The utility model relates to a kind of mobile communication antenna, relates in particular to a kind of MIMO ceiling mount antenna of mobile communication indoor distribution system.

Background technology

Cover and capacity is two major parameters that the mobile communication performance is weighed,, adopt outdoor grand station covering chamber inner region, can cause coverage hole, like this mobile communication poor-performing of indoor user because building walls can be to the electromagnetic transmission generation than overdamp.Usually the method that addresses this problem is indoor covering scheme.Indoor ceiling mount antenna is the visual plant of indoor covering, and common indoor ceiling mount antenna is inner to adopt omni directional monopoles a period of time to carry out electromagenetic wave radiation.

MIMO (multiple-input and multiple-output) technology has improved the availability of frequency spectrum of wireless communication system greatly, and especially indoor stable, abundant multipath wireless environment is very beneficial for using the MIMO multi-antenna technology.For indoor distributed system, the passage correlation is the major parameter that influences many days systematic functions of MIMO, and the wireless channel correlation is more little between the passage, is suitable for using MIMO multithread transmission more, finally improves the indoor covering system availability of frequency spectrum.In order to guarantee there is constant low correlation between different each passage, introduced indoor dual polarization ceiling mount antenna.But because the directionality of dual polarization antenna radiation unit, the antenna radiation unit modes of emplacement directly influences dual polarization ceiling mount antenna forms of radiation, and existing MIMO ceiling mount antenna can't satisfy the requirement of indoor covering, and complex structure.

The utility model content

The purpose of this utility model is to provide a kind of MIMO ceiling mount antenna, makes it when satisfying the dual polarization characteristic, the more excellent requirement of satisfying indoor covering.

Another purpose of the present utility model is: realize that only finishing indoor dual polarization with a pair of directed dual polarization a period of time covers, thereby reduced the implementation complexity and the size of common indoor dual polarized antenna.

In order to achieve the above object, the utility model is achieved in that a kind of MIMO ceiling mount antenna, it is characterized in that comprising:

First radiating element of forming by first half-wave a period of time;

Second radiating element of forming by second half-wave a period of time;

The support stick that is used for fixing described first radiating element and described second radiating element;

Described first radiating element is horizontally disposed with and passes support stick, and described second radiating element is vertically set on the described first radiating element both sides;

Described first radiating element and described second radiating element upper end are provided with the first ground connection reflecting plate;

Described first radiating element and the described second radiating element lower end are provided with the second ground connection reflecting plate;

The described second ground connection reflecting plate is circular slab or turbination; The described second ground connection reflecting plate size is less than the first ground connection reflecting plate size.

The distance of described first radiating element and the described first ground connection reflecting plate is the integral multiple wavelength.

The distance of described first radiating element and the described second ground connection reflecting plate is a 0.2-0.4 times of wavelength.

Described first ground connection reflecting plate and the described second ground connection reflecting plate are metallic plate.

Compared with prior art, the utility model utilizes the little reflecting plate of half-wave a period of time below, with the signal reflex of the radiating element downward radiation of horizontal polarization directions to the next door radiation, can improve the forms of radiation of dual polarization ceiling mount antenna like this, the structure of indoor dual polarization ceiling mount antenna is simplified relatively, the more excellent requirement of satisfying indoor covering.

Description of drawings

Fig. 1 is a three-dimensional schematic side view of the present utility model;

Fig. 2 is a three-dimensional schematic top plan view of the present utility model.

Embodiment

Working frequency range comprises following part at the MIMO of the TDD-LTE of 2310MHz ceiling mount antenna as shown in Figure 1, 2:

First radiating element of forming by half-wave a period of time of a metal material 1, second radiating element of forming by half-wave a period of time of a metal material 2;

First radiating element 1 is horizontally disposed with, and the center is that support stick 3, the second radiating elements 2 are vertically set on first radiating element, 1 both sides; First radiating element, 1 radiation direction along vertical line downwards and upwards, the half-wave dipole radiation direction along continuous straight runs of second radiating element 2 carries out radiation;

Be mutually cross polarization characteristics between first radiating element 1 and second radiating element 2;

First radiating element 1 and second radiating element 2 are fixing by the support stick 3 of metal material;

First radiating element 1 and second radiating element, 2 upper ends are provided with the first circular metallic reflection plate 4, are used for the radiated wave that first radiating element 1 makes progress is reflected;

First radiating element 1 and second radiating element, 2 lower ends are provided with the second circular metallic reflection plate 5, are used for first radiating element, 1 downward radiated wave is reflected;

The distance of first radiating element 1 and the first metallic reflection plate 4 is a wavelength;

The distance of first radiating element 1 and the second metallic reflection plate 5 is a quarter-wave;

The second metallic reflection plate 5 can be circular slab or turbination;

The second metallic reflection plate, 5 sizes are less than its top reflecting plate size.

Be provided with support frame 6 between the first metallic reflection plate 4 and the second metallic reflection plate 5.

Because the second metallic reflection plate 5 is less, thus first radiating element, 1 downward radiated wave partly be reflected, thereby can be with radiated wave to the radiation of antenna peripheral region, rather than concentrated downward radiation.

According to different demands, the distance of first radiating element 1 and the first metallic reflection plate 4 can be set to other integral multiple wavelength; The distance of first radiating element 1 and the second metallic reflection plate 5 is a 0.2-0.4 times of wavelength.

The utility model utilizes the little reflecting plate of half-wave a period of time below, with the signal reflex of the radiating element downward radiation of horizontal polarization directions to the next door radiation, can improve the forms of radiation of dual polarization ceiling mount antenna like this, the structure of indoor dual polarization ceiling mount antenna is simplified relatively, improved radiation effect, the more excellent requirement of satisfying indoor covering.

Claims

1. MIMO ceiling mount antenna is characterized in that comprising:

First radiating element of forming by first half-wave a period of time;

Second radiating element of forming by second half-wave a period of time;

Described first radiating element is horizontally disposed with, and described second radiating element is vertically set on the described first radiating element both sides;

2. a kind of MIMO ceiling mount antenna according to claim 1, the distance that it is characterized in that described first radiating element and the described first ground connection reflecting plate is the integral multiple wavelength.

3. a kind of MIMO ceiling mount antenna according to claim 1 and 2, the distance that it is characterized in that described first radiating element and the described second ground connection reflecting plate are 0.2-0.4 times of wavelength.

4. a kind of MIMO ceiling mount antenna according to claim 1 and 2 is characterized in that described first ground connection reflecting plate and the described second ground connection reflecting plate are metallic plate.