CN101533964A

CN101533964A - Broadband plane array directional antenna

Info

Publication number: CN101533964A
Application number: CN200910036576A
Authority: CN
Inventors: 刘良涛
Original assignee: Comba Telecom Systems China Ltd
Current assignee: Comba Telecom Technology Guangzhou Ltd; Comba Telecom Systems Guangzhou Co Ltd
Priority date: 2009-01-12
Filing date: 2009-01-12
Publication date: 2009-09-16
Anticipated expiration: 2029-01-12
Also published as: CN101533964B

Abstract

The invention discloses a broadband plane array directional antenna, which comprises a power-dividing network, a reflecting plate, a substrate material and N array half-wave vibrators, wherein N is more than or equal to 2, and the power-dividing network is formed by performing shunt feed on each half-wave vibrator by a feed line; the half-wave vibrators is provided with two vibrator arms which have frame-shaped structures; the power-dividing network and the half-wave vibrators are printed on at least one side of the substrate material; and the reflecting plate and the substrate material are supported by media and are fixed with each other. Compared with the prior art, the broadband plane array directional antenna has the following advantages that: the unique design of the vibrator arms is applied to the prior printed antenna to ensure the consistency of antenna processing for the convenience of debugging and mounting, and the broadband plane array directional antenna is suitable for batch production with thin thickness, light weight and low cost.

Description

Broadband plane array directional antenna

[technical field]

The present invention relates to the antenna of mobile communication base station field, especially relate to a kind of broadband plane array directional antenna.

[technical background]

Along with the fast development of mobile communication, electromagnetic environment is complicated day by day, has proposed very high requirement for the design of the directional antenna that is fit to long-distance transmissions.Require gain high on the electric property, long transmission distance; Require good directivity, ambient signals is not caused interference.Consider on the structure actual needs set up is installed, and, cube little the coordination shape of surrounding environment, in light weight, good looking appearance.And cost is low could satisfy the market competition demand.

Plane array directional antenna is one of principal mode of gain directional antenna, and what adopt usually in the market is the form of double-deck microstrip patch antenna array, and this antenna structure is relatively complicated, and the antenna material of requirement is many, the cost height.The employing ordinary rectangular antenna dipole array that has, this beamwidth of antenna is narrow usually.Other gain directional antenna, as parabolic antenna, short backfire antenna etc. have good electricity function index, but antenna volume are big, and weight is big, sets up to require the space big, and the cost height.

[summary of the invention]

Purpose of the present invention will overcome above-mentioned deficiency exactly, and a kind of broadband plane array directional antenna with low cost, high bandwidth, small size is provided.

For realizing this purpose, the present invention adopts following technical scheme:

A kind of broadband plane array directional antenna of the present invention comprises power division network, reflecting plate, backing material and N half-wave dipole that is array, wherein, and N 〉=2, and:

Described power division network carries out parallelly feeding by feeder line to each half-wave dipole and forms;

Described half-wave dipole has two oscillator arms, and described oscillator arms is frame shape structure;

Described power division network and half-wave dipole are printed on the one side at least of backing material;

Between described reflecting plate and the backing material by dielectric support and fix.

Preferable, the rectangular frame shape of the oscillator arms of described half-wave dipole structure.

The oscillator arms of first side of described each half-wave dipole is printed on first of backing material, and the oscillator arms of second side then is printed on second of backing material.

The feeder line that described power division network adopted is a parallel wire, is printed in respectively on described two faces of described backing material to electrically connect with each oscillator arms with each half-wave dipole.

Described backing material is PCB (medium) plate.

The array that described each half-wave dipole is formed, its line width and col width are 0.5-1 times of operation wavelength.

Being printed with respectively on the described backing material two sides is connected to each other is used for the feeder line of short circuit, respectively with this two sides on the feeder line of power division network electrically connect.

The described feeder line that is used for short circuit is 1/4 operation wavelength.

As interchangeable example, the oscillator arms of described half-wave dipole also can be regular polygon frame shape structure or rounded or oval frame shape structure.

Compared with prior art, the present invention possesses following advantage: be applied in traditional printed antenna by unique design, guaranteed the consistency of antenna processing, be convenient to debugging and install, be fit to produce in batches oscillator arms, and thin thickness, light weight, cost is low.

[description of drawings]

Fig. 1 is the structural representation of an embodiment of broadband plane array directional antenna of the present invention;

Fig. 2 is the side structure schematic diagram of Fig. 1;

Fig. 3 is the structural representation of the half-wave dipole of the present invention's employing;

Fig. 4 is operated in the horizontal radiation pattern of 2450MHz for antenna of the present invention;

Fig. 5 is operated in the elevation radiation patytern of 2450MHz for antenna of the present invention.

[embodiment]

The present invention is further illustrated below in conjunction with drawings and Examples:

Please in conjunction with Fig. 1, broadband plane array directional antenna of the present invention comprises reflecting plate 1 that metal material makes, adopt PCB (medium) plate as backing material 2, as 16 secondary half-wave dipoles 3 of radiating element, and the power division network 4 that each half-wave dipole 3 is carried out parallelly feeding.

Backing material 2 shown in Figure 1 has two faces, promptly towards reader's the upper surface lower surface opposite with it, solid line shown in Figure 1 is partly represented the parts that print on the upper surface, dotted portion is then represented the parts that print on lower surface, because power division network 4 has adopted parallel wire, so its feeder line that is in lower surface can't dot on figure.

In conjunction with Fig. 1 and Fig. 3 as can be known, the half-wave dipole 3 that present embodiment adopted has two

oscillator arms

31,32, two

oscillator arms

31,32 feeder lines by power division network 4 carry out feed, with Fig. 1 in like manner, solid line is depicted as the parts of backing material 2 upper surfaces among Fig. 3, and dotted line then is the parts of lower surface, thereby, in the present invention, two

oscillator arms

31,32 of described half-wave dipole 3 place respectively on two faces of backing material 2, and among Fig. 1, the oscillator arms 31 of the same side (as left side among Fig. 3) all is printed in same (lower surface) of

backing material

2, and 32 of the oscillator arms of opposite side (as the right side among Fig. 3) all are printed in another face (upper surface) of backing material 2.Described power division network 4 adopts parallel wire to be connected with each half-wave dipole 3, it shows that on the backing material 2 of Fig. 3 be equitant feeder line 40 on two faces of backing material 2,40 ', but the feeder line 40 ' of lower surface is covered by the feeder line 40 of upper surface and does not show.

Oscillator arms 31, the 32 rectangular frame shape structures of half-wave dipole 3 among Fig. 3, it is removed a central region by a rectangular sheet metal and forms the frame shape, and it does suitable distortion near power division network feeder line place and form, with suitable concrete electric requirement.Although the present invention does not provide concrete parameter, but, those skilled in the art are after reading over the present invention, should know, with

oscillator arms

31,32 shape replaces with polygon frame shape structure or circular frame shape structure or oval frame shape structure, under the prerequisite of carrying out suitable optimization, also can reach the identical or similar effect of present embodiment.

Please consult Fig. 1 again, based on mentioned above principle, array antenna among Fig. 1 is formed based on 16 half-wave dipoles 3, the oscillator arms 31 of first side of 16 half-wave dipoles 3 (upper left side among the figure) is printed on the lower surface of

backing material

2, and 32 of the oscillator arms of opposite side (lower right side among the figure) are printed on the upper surface of backing material 2 towards the reader.16 half-wave dipoles 3 are formed the array of 4x4, and it has line width and col width, to the 0.5-1 times of operation wavelength that be constrained to of line width, col width.

As seen from Figure 1, on with one side, after adjacent 4 half-wave dipoles 3 adopt two sections feeder lines 401,402 to link to each other in twos, connect these two sections feeder lines 401 by another feeder line 403 again, 402, can form I-shaped power division network 4 feed structures, form elementary cell by so I-shaped substantially feed structure for 4, make it form array antenna in present embodiment by the two-stage I-shape construction then, conceive exquisitely, Butut is proper.And in fact, no matter be half-wave dipole 3 combinations of the same delegation (row) among Fig. 1, still the described elementary cell of forming by I-shaped feed structure, and the like the array of several half-wave dipoles 3 compositions of flexible combination, all can form an independently antenna.Just for the antenna of single file (row), the Butut mode of power division network 4 will change to some extent, in addition, all can be those skilled in the art's flexible combination.

Among Fig. 1, also show the feeder line that is used for short circuit 5,5 ' that is positioned at medium position, it in like manner adopts parallel wire, promptly comprises second section 5 ' of being printed on backing material 2 lower surfaces and is printed on first section 5 of backing material 2 upper surfaces, respectively with the parallel wire 40 of power division network 4,40 ' electrically connects, two sections feeder line 5,5 ' mutual short circuits that short circuit is used play the effect of DC earthing alarm, thereby, in the occasion that does not need the DC earthing alarm, also can remove this two sections short

circuits feeder line

5,5 '.These two sections short circuits suit to adopt the length of 1/4 operation wavelength with feeder line 5,5 '.

See also Fig. 2, Fig. 2 shows the structural relation between metallic reflection plate 1 and the backing material 2, be in each other on two faces that parallel, support and fix by medium member 6, mid portion just forms air layer 7, so, just complete the presenting of overall structure of broadband plane array directional antenna of the present invention.With number in the figure is that 8 places are the aerial signal input interface, just can bring into play the allomeric function of antenna.

By the planar array antenna sample that this embodiment constitutes, under the varying environment of indoor and outdoor, to test, full frequency band has good directional diagram.2400～2500MHz frequency range, voltage standing wave ratio are less than 1.5, and the actual measurement gain is greater than 18dBi.Consult Fig. 4 and Fig. 5, horizontal plane 3dB beamwidth is 17 degree, and vertical beamwidth is 19 degree.Environmental test is qualified, can satisfy the requirement of mobile communication system well.

Find out that easily this antenna will have simple and compact for structure and high performance advantage made in accordance with the present invention, and be easy to make, conveniently install and use.And compare with the principal mode of current similar product, bandwidth of the present invention is wide, and cost is extremely low, has considerable economic worth.

The foregoing description is a preferred implementation of the present invention; but not merely be restricted to the described embodiments; other any do not deviate from change, the modification done under spirit of the present invention and the principle, substitutes, combination, simplify; all should be the substitute mode of equivalence, all be included within protection scope of the present invention.

Claims

1, a kind of broadband plane array directional antenna comprises power division network, reflecting plate, backing material and N half-wave dipole that is array, wherein, and N 〉=2, it is characterized in that:

2, broadband plane array directional antenna according to claim 1 is characterized in that: the rectangular frame shape of the oscillator arms of described half-wave dipole structure.

3, broadband plane array directional antenna according to claim 2 is characterized in that: the oscillator arms of first side of described each half-wave dipole is printed on first of backing material, and the oscillator arms of second side then is printed on second of backing material.

4, broadband plane array directional antenna according to claim 3, it is characterized in that: the feeder line that described power division network adopted is a parallel wire, is printed in respectively on described two faces of described backing material to electrically connect with each oscillator arms with each half-wave dipole.

5, broadband plane array directional antenna according to claim 4 is characterized in that: described backing material is PCB (medium) plate

6, according to any described broadband plane array directional antenna in the claim 1 to 5, it is characterized in that: the array that described each half-wave dipole is formed, its line width and col width are 0.5-1 times of operation wavelength.

7, according to any described broadband plane array directional antenna in the claim 1 to 5, it is characterized in that: being printed with respectively on the described backing material two sides is connected to each other is used for the feeder line of short circuit, respectively with this two sides on the feeder line of power division network electrically connect.

8, broadband plane array directional antenna according to claim 7 is characterized in that: the described feeder line that is used for short circuit is 1/4 operation wavelength.

9, broadband plane array directional antenna according to claim 1 is characterized in that: the oscillator arms of described half-wave dipole is regular polygon frame shape structure.

10, broadband plane array directional antenna according to claim 1 is characterized in that: the rounded or oval frame shape structure of the oscillator arms of described half-wave dipole.