CN202178382U

CN202178382U - Wide-frequency bipolarization low-isolation die-casting radiating unit

Info

Publication number: CN202178382U
Application number: CN2011203081661U
Authority: CN
Inventors: 陈小平; 魏巍; 田佰文; 汪永刚; 汤斌
Original assignee: Wuhan Hongxin Telecommunication Technologies Co Ltd
Current assignee: CICT Mobile Communication Technology Co Ltd
Priority date: 2011-08-23
Filing date: 2011-08-23
Publication date: 2012-03-28
Anticipated expiration: 2021-08-23

Abstract

The utility model discloses a wide-frequency bipolarization low-isolation die-casting radiating unit, relating to an antenna radiating unit. The structure of the wide-frequency bipolarization low-isolation die-casting radiating unit is as follows: a plastic base (5) is arranged in a middle connecting hole of a metal reflection board (6); the plastic base (5), a U-shaped Balun and support arm (4), a radiating unit vibrator arm short-circuit bar (9) and two mutually orthogonal symmetric vibrators are sequentially connected from the bottom up; each symmetric vibrator is formed by connecting two vibrator arms (2) with an insulating spacer (3) through a metal feed sheet (1); and the vibrators and a feed cable (7) are connected, the feed cable (7) passes through the plastic base (5) and then is externally connected with an antenna feed network. The utility model has the advantages of simple and reliable structure, easiness for installation, low manufacturing cost, and excellent wide band and low isolation performances; in addition, the utility model can be widely applied to communication systems of WCDMA (Wideband Code Division Multiple Access), PCS (Personal Communication Service), GSM (Global System for Mobile Communication) and the like.

Description

A kind of band dual polarization hangs down isolation die-casting die radiating element

Technical field

The utility model relates to a kind of antenna radiation unit, relates in particular to the low isolation die-casting die radiating element of a kind of band dual polarization, is applied on the Bipolarization antenna for base station.

Background technology

In information age today, along with issuing of 3G license, the mobile communication business development is rapid, and traffic carrying capacity becomes explosive growth.In order to attract more user, the competition between the operator is growing more intense, and various value-added services emerge in an endless stream, and this just causes power system capacity constantly to expand, and base station number is more and more.

In order to reduce base station number and to build a station cost, dual polarized antenna is widely used in the Modern Mobile Communications Systems.The advantage of dual polarized antenna is that it can overcome the signal fadeout phenomenon that causes owing to multipath effect, reduces call loss, reduces to disturb, and improves communication quality, thereby reduces the quantity of required base station.

Influence an isolation that important indicator is exactly a dual polarized antenna of dual polarized antenna performance, the isolation of the radiating element on the dual polarized antenna directly influences the isolation index of this antenna, generally requires in bandwidth range the isolation should be less than-28dB.Conventional vibrator type dual-polarization radiating unit is existing deficiency aspect the isolation index; Can only reach about 15% at isolation less than the bandwidth of-28dB; Index such as compare if take into account standing-wave ratio and front and back simultaneously, bandwidth can be narrower, and this obviously can not adapt to the needs of present Communication Development.

Summary of the invention

The purpose of the utility model just is to overcome the shortcoming and defect that prior art exists, and provides a kind of band dual polarization to hang down isolation die-casting die radiating element.

The purpose of the utility model is achieved in that

The utility model comprises metal feed tab, oscillator arms, insulation spacer, U-shaped Ba Lun and support arm, plastic feet, metallic reflection plate, feeder cable, radiating element fixing feet and radiating element oscillator arms short-circuiting bar;

Its annexation is:

Middle connecting hole at the metallic reflection plate is provided with plastic feet, and from top to bottom, plastic feet, U-shaped Ba Lun and support arm, radiating element oscillator arms short-circuiting bar and two mutually orthogonal symmetrical dipoles are connected successively; Each symmetrical dipole is formed by connecting through metal feed tab and insulation spacer two oscillator arms;

Oscillator is connected with feeder cable, and feeder cable passes external antenna feeding network behind the plastic feet;

U-shaped Ba Lun and support arm are fixed on the plastic feet through the radiating element fixing feet.

Operation principle:

Two symmetrical dipoles of the utility model are mutually orthogonal to be ± 45 ° of polarization, accomplishes balance-imbalance conversion through U type barron structure, and high-frequency energy produces mutually orthogonal ± 45 ° antenna pattern after being fed into this radiating element through feeding network.

The utlity model has advantage and good effect:

1. simple and reliable for structure, be easy to low cost of manufacture is installed;

2. has the low isolation performance of good broadband;

3. can solve the problem of passive intermodulation well through special coating process;

4. through the improvement to existing radiating element, the utility model can reach 23.7% in the isolation index less than the bandwidth the under-30dB situation, simultaneously VSWR < 1.4;

5. can be widely used in the communication systems such as WCDMA, PCS, GSM.

Description of drawings

Fig. 1 is the front view of the utility model;

Fig. 2 is the stereogram of the utility model;

Fig. 3 is part (U-shaped Ba Lun and support arm and the radiating element fixing feet) front view of the utility model;

Fig. 4 is part (oscillator) vertical view of the utility model;

Fig. 5 is the stereogram of metal feed tab.

Among the figure:

1-metal feed tab; 2-oscillator arms; 3-insulation spacer;

4-U-shaped Ba Lun and support arm; 5-plastic feet; 6-metallic reflection plate;

7-feeder cable; 8-radiating element fixing feet;

9-radiating element oscillator arms short-circuiting bar.

Embodiment

Specify below in conjunction with accompanying drawing and embodiment:

1, overall

The utility model comprises metal feed tab 1, oscillator arms 2, insulation spacer 3, U-shaped Ba Lun and support arm 4, plastic feet 5, metallic reflection plate 6, feeder cable 7, radiating element fixing feet 8 and radiating element oscillator arms short-circuiting bar 9;

Its annexation is:

Middle connecting hole at metallic reflection plate 6 is provided with plastic feet 5, and from top to bottom, plastic feet 5, U-shaped Ba Lun and support arm 4, radiating element oscillator arms short-circuiting bar 9 and two mutually orthogonal symmetrical dipoles are connected successively; Each symmetrical dipole is formed by connecting through metal feed tab 1 and insulation spacer 3 two oscillator arms 2;

Oscillator is connected with feeder cable 7, and feeder cable 7 passes plastic feet 5 back external antenna feeding networks;

U-shaped Ba Lun and support arm 4 are fixed on the plastic feet 5 through radiating element fixing feet 8.

2, functional part

1) the metal feed tab 1

Like Fig. 5, metal feed tab 1 is a kind of arcuate tab, and two ends are provided with connecting hole.

Through connecting hole and insulation spacer 3 two oscillator arms 2 are connected to a symmetrical dipole.

2) oscillator arms 2

Like Fig. 1,2,4, oscillator arms 2 presents a kind of square structure, and hollow space is through lines bending Qu Chengxian ellipsoidal structure, and adjacent vibration generators arm 2 is connected through radiating element oscillator arms short-circuiting bar 9.

Be connected through metal feed tab 1 between the dipole arm 2; Two metal feed tab 1 are vertical each other up and down; The bow direction of top metal feed tab 1 upwards, below metal feed tab 1 bow direction downward, improve the isolation of radiating element through the spacing of adjustment metal feed tab 1; The phase center of radiating element is overlapped with geometric center, improve axially and wait the directional diagram index with ± 60 ° of cross polarization ratios.

3) insulation spacer 3

Like Fig. 1,2, be provided with connecting hole in the middle of the plastic spacer 3.

Metal feed tab 1 is kept apart through insulation spacer 3 and radiating element, and the thickness of insulation spacer 3 can adjust according to index requests such as isolation, standing-wave ratios.

4) U-shaped Ba Lun and support arm 4

Like Fig. 1,2, U-shaped Ba Lun and support arm 4 are a kind of U type metal support structure, and its effect is to support and balance-imbalance conversion.

Dipole arm 2 interconnects as a whole through U-shaped Ba Lun and support arm 4; U-shaped Ba Lun and support arm 4 convert the uneven feed of 7 pairs of radiating elements of feeder cable into balanced feeding, radiating element symmetrical dipole two arm size of current are equated and direction identical; U-shaped Ba Lun and support arm 4 play impedance matching and the effect of supporting oscillator arms simultaneously, and length is 1/4th of operation wavelength.

5) plastic feet 5

Like Fig. 1,2, plastic feet 5 is a kind of insulator foots, and draw-in groove is arranged on the base.

Radiating element is installed on the metallic reflection plate 6 through plastic feet 5; Plastic feet 5 is kept apart radiating element and metallic reflection plate 6; Avoid between radiating element and the metallic reflection plate 6 can solving the passive intermodulation problem of dual polarized antenna so well owing to the discontinuous current phenomenon that combines closely not produce.

6) the metallic reflection plate 6

Like Fig. 1,2, metallic reflection plate 6 is a kind of concave metal thin plates, is provided with connecting hole between wherein.

The size of metallic reflection plate 6 can be done suitable adjustment according to the requirement of directional diagram index.

7) feeder cable 7

Like Fig. 1, feeder cable 7 is low loss coaxial line cables, and its effect is to this radiating element feed.

8) the radiating element fixing feet 8

Like Fig. 3, radiating element fixing feet 8 is placed in the draw-in groove of plastic feet 5, can prevent effectively that radiating element from rotating.

9) radiating element oscillator arms short-circuiting bar 9

Like Fig. 2, radiating element oscillator arms short-circuiting bar 9 is a kind of bonding jumpers, and its effect is to connect adjacent vibration generators arm 2.

The length of radiating element oscillator arms short-circuiting bar 9 is 1/2nd to 1/4th of operation wavelength.

3, manufacture craft

The utility model is confirmed the overall dimension of radiating element through software emulation with the mode that actual test combines, so that let the performance of background radiation unit reach optimum.Adopt die sinking die casting in the manufacturing, one-time formed mode guarantees the consistency of radiating element.Radiating element adopts alloy material, and the surface uses special plating to be coated with the passive intermodulation problem that technology solves radiating element.Aspect antenna array, can all use this radiating element, the mode that also can take the background radiation unit to combine with other radiating element reaches needed S parameter and directional diagram index.

The utlity model has the characteristics of the low isolation of broadband, the dual polarized antenna that forms through the group battle array can obtain good interport isolation performance, can be applied in the communication systems such as WCDMA, GSM, PCS.

Although the best case study on implementation of the utility model has been represented and described to content as stated, shall not be construed as restriction to the utility model self.Any modification of being done within all spirit and principles at the utility model, be equal to replacement and improvement etc., all should be included within the protection range of the utility model.

Claims

1. a band dual polarization hangs down isolation die-casting die radiating element, it is characterized in that:

Comprise metal feed tab (1), oscillator arms (2), insulation spacer (3), U-shaped Ba Lun and support arm (4), plastic feet (5), metallic reflection plate (6), feeder cable (7), radiating element fixing feet (8) and radiating element oscillator arms short-circuiting bar (9);

Its annexation is:

Middle connecting hole at metallic reflection plate (6) is provided with plastic feet (5), and from top to bottom, plastic feet (5), U-shaped Ba Lun and support arm (4), radiating element oscillator arms short-circuiting bar (9) and two mutually orthogonal symmetrical dipoles are connected successively; Each symmetrical dipole is formed by connecting through metal feed tab (1) and insulation spacer (3) two oscillator arms (2);

Oscillator is connected with feeder cable (7), and feeder cable (7) passes plastic feet (5) back external antenna feeding network;

U-shaped Ba Lun and support arm (4) are fixed on the plastic feet (5) through radiating element fixing feet (8).

2. by the low isolation die-casting die radiating element of the described a kind of band dual polarization of claim 1, it is characterized in that:

Described metal feed tab (1) is a kind of arcuate tab, and two ends are provided with connecting hole.

3. by the low isolation die-casting die radiating element of the described a kind of band dual polarization of claim 1, it is characterized in that:

Described oscillator arms (2) presents a kind of square structure, and hollow space is through lines bending Qu Chengxian ellipsoidal structure.

4. by the low isolation die-casting die radiating element of the described a kind of band dual polarization of claim 1, it is characterized in that:

Described U-shaped Ba Lun and support arm (4) are a kind of U type metal support structure, and its length is 1/4th of operation wavelength.

5. by the low isolation die-casting die radiating element of the described a kind of band dual polarization of claim 1, it is characterized in that:

Described plastic feet (5) is a kind of insulator foot, and draw-in groove is arranged on the base.

6. by the low isolation die-casting die radiating element of the described a kind of band dual polarization of claim 1, it is characterized in that:

Described metallic reflection plate (6) is a kind of concave metal thin plate, is provided with connecting hole between wherein.

7. by the low isolation die-casting die radiating element of the described a kind of band dual polarization of claim 1, it is characterized in that:

Described radiating element oscillator arms short-circuiting bar (9) is a kind of bonding jumper, and its length is 1/2nd to 1/4th of operation wavelength.