CN214203987U - Low-frequency broadband antenna array - Google Patents

Abstract

The utility model provides a low frequency broadband antenna array, including the reflecting plate and set up the feed network at the reflecting plate back, still including setting up at the positive radiation array of reflecting plate, the working frequency channel of radiation array is 698 and supplyes 960MHz, the radiation array includes N low frequency broadband radiating element, N low frequency broadband radiating element is along the positive longitudinal centerline interval arrangement of reflecting plate, the feed network respectively with N low frequency broadband radiating element are connected; each low-frequency broadband radiation unit is provided with a concave vertical part at the center, and the concave vertical part is arranged on the periphery of the concave vertical part; and N is a positive integer greater than or equal to 1. The utility model discloses have better radiation performance and electric property, satisfied operator's performance index requirement and frequency channel demand.

Description

Low-frequency broadband antenna array

[ technical field ] A method for producing a semiconductor device

The utility model relates to a mobile communication field, concretely relates to low frequency broadband antenna array.

[ background of the invention ]

With the continuous distribution of 700M spectrum in partial areas, 700MHz becomes a gold spectrum for low-frequency LTE (Long Term Evolution) deployment, 5G networks of 700M frequency bands are built by radio, television and mobile investment, the wide coverage is carried out on rural areas by utilizing the advantage of low frequency, the deep coverage is carried out on urban areas, and a high-quality basic coverage network is developed, wherein 700MHz has the characteristics of low transmission loss, wide coverage range and strong penetrating power, but has smaller capacity, and can be widely used in the field of Internet of things access of 5G networks. According to calculation, only 40 ten thousand base stations are needed to build a national 5G network by using a 700MHz frequency band, and in the face of such a wide market, 700M network antenna arrays on the market are very few, and for the situation, a low-frequency broadband antenna array with a moderate size and very excellent electrical performance and radiation performance is urgently needed to be developed.

[ Utility model ] content

A primary object of the present invention is to provide a low frequency broadband antenna array, which is small and low cost, and has better radiation performance and electrical performance, thereby satisfying the performance index requirements and frequency band requirements of operators.

In order to achieve the above object, the present invention provides a low frequency broadband antenna array, which comprises a reflector plate and a feed network disposed on the back of the reflector plate, and further comprises a radiation array disposed on the front of the reflector plate, wherein the working frequency band of the radiation array is 698 plus 960MHz, the radiation array comprises N low frequency broadband radiation units, the N low frequency broadband radiation units are arranged along the longitudinal center line of the front of the reflector plate at intervals, and the feed network is connected to the N low frequency broadband radiation units respectively; each low-frequency broadband radiation unit is provided with a concave vertical part at the center, and the concave vertical part is arranged on the periphery of the concave vertical part; and N is a positive integer greater than or equal to 1.

Preferably, the two longitudinal sides of the reflector are respectively bent by 90 degrees towards the front surface of the reflector to form metal hemming pieces.

Preferably, spacers are respectively installed on both longitudinal sides of the back surface of the reflection plate.

Preferably, the distance from the bottom end of the spacer to the reflector is smaller than the distance from the top end of the metal hemming piece to the reflector.

As the preferred technical scheme, the low-frequency broadband radiation unit is in including setting up the positive base of reflecting plate, setting are in four support arms and four oscillator arms around the base, the support arm with the base is the slope setting and the contained angle between the two is the obtuse angle, four oscillator arms set up perpendicularly respectively the top of four support arms and respectively towards keeping away from the direction of the center of base extends, four oscillator arms enclose and form a square structure.

As a preferable technical scheme, two adjacent vibrator arms are connected through a plastic buckle.

Preferably, an E-shaped extension portion is formed on one side of each vibrator arm far from the corresponding support arm, and the E-shaped extension portion is perpendicular to the corresponding vibrator arm and extends towards a direction close to the reflection plate.

As a preferred technical scheme, the isolation folding strips around the low-frequency broadband radiation unit respectively correspond to a vibrator arm; the installation department that separates the hem strip is located the below of the oscillator arm that corresponds, the spill vertical part that separates the hem strip is located the below of the E shape extension that corresponds and is relative setting with the E shape extension that corresponds.

As a preferred technical scheme, the base, the four supporting arms and the four vibrator arms are integrally formed.

Preferably, the mounting portion and the concave vertical portion are integrally formed.

The utility model provides a low frequency broadband antenna array, simple structure easily assembles, and is small, with low costs to have better radiation performance and electric property, satisfied operator's performance index requirement and frequency channel demand.

[ description of the drawings ]

To further disclose the specific technical content of the present disclosure, please refer to the attached drawings, wherein:

fig. 1 and fig. 2 are schematic structural diagrams of a low-frequency broadband antenna array according to an embodiment of the present invention;

fig. 3 is a schematic structural diagram of a low-frequency broadband radiating element of the low-frequency broadband antenna array shown in fig. 1.

Description of the symbols:

metal hemming sheet 12 of reflection plate 10

Separator 14

Base 22 of low frequency broadband radiating element 20

Support arm 24 vibrator arm 26

E-shaped extension 28

Isolation edge strip 30 mounting portion 32

Concave vertical portion 34

Plastic fastener 40

[ detailed description ] embodiments

Referring to fig. 1 and fig. 2, the present embodiment provides a low-frequency broadband antenna array, which includes a metal reflector 10, a radiation array disposed on the front surface of the reflector 10, and a feeding network (not shown) disposed on the back surface of the reflector 10. The working frequency range of the radiation array is 698-960MHz, which meets the frequency range requirement of operators.

The radiating array comprises N low-frequency broadband radiating elements 20, and the N low-frequency broadband radiating elements 20 are arranged at intervals along the longitudinal center line of the front surface of the reflecting plate 10. N is a positive integer greater than or equal to 1, and the feeding network is connected to the N low-frequency broadband radiation units 20, respectively, to feed the N low-frequency broadband radiation units 20. The feed network adopts the form of a power divider to feed. Fig. 1 and 2 of the present invention show only a portion of a low frequency broadband antenna array. The number of low frequency broadband radiating elements 20 may be set according to practical circumstances.

Both longitudinal sides of the reflection plate 10 are respectively bent by 90 degrees toward the front surface of the reflection plate 10 to form metal hemming pieces 12. Spacers 14 are respectively installed at both longitudinal sides of the rear surface of the reflection plate 10. The outer side surface of the metal hemming plate 12 (i.e., the surface on the side away from the center of the reflection plate 10) is flush with the outer side surface of the spacer 14 on the same side (i.e., the surface on the side away from the center of the reflection plate 10). The distance from the bottom end of the spacer 14 to the reflection plate 10 is smaller than the distance from the top end of the metal hemming plate 12 to the reflection plate 10. The arranged metal folded edge sheet 12 can improve the directional diagram performance of the radiation array, and the arranged isolating sheet 14 can well improve the front-to-back ratio index of the low-frequency broadband antenna array, so that the low-frequency broadband antenna array has good radiation performance and electrical performance.

Preferably, the spacer 14 is mounted to the rear surface of the reflection plate 10 by a fastener such as a rivet or the like.

As shown in fig. 3, the low frequency broadband radiation unit 20 includes a base 22 disposed on the front surface of the reflection plate 10, four support arms 24 disposed around the base 22, and four vibrator arms 26. The supporting arm 24 and the base 22 are disposed in an inclined manner, and the included angle therebetween is an obtuse angle. The four vibrator arms 26 are respectively vertically arranged at the top ends of the four supporting arms 24 and respectively extend towards the direction far away from the center of the base 22, and the four vibrator arms 26 are enclosed to form a square structure.

Two adjacent oscillator arms 26 are connected through a plastic buckle 40, and the plastic buckle 40 can fix the low-frequency broadband radiation unit 20 well, so that the performance of the low-frequency broadband radiation unit 20 is more stable.

Preferably, the base 22, the four support arms 24 and the four vibrator arms 26 are integrally formed, so that the manufacturing is convenient and the cost is reduced.

Each vibrator arm 26 is formed with an E-shaped extension 28 on a side thereof away from the corresponding support arm 24, and the E-shaped extension 28 is disposed perpendicular to the corresponding vibrator arm 26 and extends toward a direction close to the reflection plate 10. Preferably, a side of each vibrator arm 26 away from the corresponding support arm 24 is bent 90 degrees toward the reflection plate 10 to form the E-shaped extension 28. The E-shaped extension 28 can realize the radiation performance and bandwidth of the low frequency broadband radiation unit 20, thereby realizing 698-960MHz frequency band.

Isolation folding strips 30 are respectively arranged around each low-frequency broadband radiating unit 20, and the isolation folding strips 30 around each low-frequency broadband radiating unit 20 respectively correspond to one vibrator arm 26. The isolation edge strip 30 includes a mounting portion 32 provided on the front surface of the reflection plate 10 and a concave vertical portion 34 formed on one side of the mounting portion 32 away from the center of the corresponding low frequency broadband radiation unit 20. The mounting portion 32 of the isolation hem bar 30 is positioned below the corresponding vibrator arm 26, and the concave vertical portion 34 of the isolation hem bar 30 is positioned below the corresponding E-shaped extension portion 28 and opposite to the corresponding E-shaped extension portion 28. By separating the concave vertical part 34 of the edge folding strip 30, various performances of the low-frequency broadband radiating unit 20 can be well improved, and further, the performance of the low-frequency broadband antenna array is ensured, so that the low-frequency broadband antenna array has high gain, wave width convergence, and better indexes such as half-power wave beam width, front-to-back ratio, cross polarization discrimination rate and the like.

Preferably, the mounting portion 32 and the recessed vertical portion 34 are integrally formed, which facilitates manufacturing and reduces cost.

The utility model discloses simple structure, easily equipment, it is small, with low costs to have better radiation performance and electric property, satisfied operator's performance index requirement and frequency channel demand.

The above-mentioned embodiments only represent some embodiments of the present invention, and the description thereof is specific and detailed, but not to be construed as limiting the scope of the present invention. It should be noted that, for those skilled in the art, without departing from the spirit of the present invention, several variations and modifications can be made, which are within the scope of the present invention. Therefore, the protection scope of the present invention should be subject to the appended claims.

Claims (10)

1. A low-frequency broadband antenna array comprises a reflecting plate and a feed network arranged on the back of the reflecting plate, and is characterized by further comprising a radiation array arranged on the front of the reflecting plate, wherein the working frequency range of the radiation array is 698-960MHz, the radiation array comprises N low-frequency broadband radiation units, the N low-frequency broadband radiation units are arranged at intervals along the longitudinal center line of the front of the reflecting plate, and the feed network is respectively connected with the N low-frequency broadband radiation units; each low-frequency broadband radiation unit is provided with a concave vertical part at the center, and the concave vertical part is arranged on the periphery of the concave vertical part; and N is a positive integer greater than or equal to 1.

2. The low frequency broadband antenna array of claim 1, wherein two longitudinal sides of the reflector plate are respectively bent 90 degrees towards the front surface of the reflector plate to form metal folded edge pieces.

3. The low frequency broadband antenna array of claim 2, wherein spacers are mounted on both longitudinal sides of the back surface of the reflector plate.

4. The low frequency broadband antenna array of claim 3, wherein a distance from a bottom end of the spacer to the reflector plate is less than a distance from a top end of the metal hem tab to the reflector plate.

5. The low-frequency broadband antenna array according to claim 1, wherein the low-frequency broadband radiating unit includes a base disposed on the front surface of the reflector plate, four supporting arms disposed around the base, and four oscillator arms, the supporting arms and the base are disposed in an inclined manner, an included angle between the supporting arms and the base is an obtuse angle, the four oscillator arms are respectively disposed at the top ends of the four supporting arms vertically and respectively extend in a direction away from the center of the base, and the four oscillator arms surround to form a square structure.

6. The low frequency broadband antenna array of claim 5, wherein two adjacent dipole arms are connected by a plastic snap fit.

7. The low frequency broadband antenna array of claim 5, wherein each dipole arm is formed with an E-shaped extension on a side thereof away from the corresponding support arm, the E-shaped extension being perpendicular to the corresponding dipole arm and extending in a direction toward the reflector plate.

8. The low-frequency broadband antenna array of claim 7, wherein the isolation flange strips around the low-frequency broadband radiating element respectively correspond to one oscillator arm; the installation department that separates the hem strip is located the below of the oscillator arm that corresponds, the spill vertical part that separates the hem strip is located the below of the E shape extension that corresponds and is relative setting with the E shape extension that corresponds.

9. The low frequency broadband antenna array of claim 5, wherein the base, the four support arms, and the four dipole arms are integrally formed.

10. The low frequency broadband antenna array of claim 1, wherein the mounting portion and the concave vertical portion are integrally formed.

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