CN113224510B

CN113224510B - 5G low-profile broadband slot patch antenna

Info

Publication number: CN113224510B
Application number: CN202110387930.7A
Authority: CN
Inventors: 褚庆昕; 温成龙; 常玉林
Original assignee: South China University of Technology SCUT
Current assignee: South China University of Technology SCUT
Priority date: 2021-04-12
Filing date: 2021-04-12
Publication date: 2023-02-14
Anticipated expiration: 2041-04-12
Also published as: CN113224510A

Abstract

The invention discloses a 5G low-profile broadband slot patch antenna, which comprises a bottom plate, a bracket and a substrate, wherein the bottom plate is provided with a through hole; the base plate passes through the support frame and erects in the bottom plate top, the support comprises two perpendicular criss-cross backup pads, backup pad perpendicular to bottom plate and base plate, every backup pad both sides are equallyd divide and do not are equipped with looks coupled feeder and conductor, the bottom surface of bottom plate is equipped with the conductor layer, the base plate top surface is equipped with the metal irradiator, the irradiator is equipped with the triangle incision all around, be equipped with perpendicular crossing gap on the irradiator intermediate position, the feeder and the conductor of two backup pads are connected with four tip one-to-one of perpendicular crossing gap respectively, the feeder and the conductor of a backup pad are connected to a gap both ends of perpendicular crossing gap promptly, the conductor is connected with the conductor layer. According to the invention, through a unique gap radiation structure, under the condition of not increasing the size of the antenna, the antenna oscillator has the structural advantages of low section height, light weight and low cost, and meanwhile, excellent working bandwidth, good port isolation and radiation performance are realized.

Description

5G low-profile broadband slot patch antenna

Technical Field

The invention relates to the technical field of wireless communication, in particular to a 5G low-profile broadband slot patch antenna.

Background

The rapid development of 5G technology has led to an explosive increase in the number of 5G base station antennas required. Massive MIMO technology and beamforming technology in 5G base station antennas are realized by adopting large-scale arrays. Considering the increase of the size and the cost of the antenna array scale, the 5G antenna unit has to meet the design requirements of small size, low cost and the like.

At present, the design and manufacturing industry of 5G antennas is relatively mature. In order to reduce the profile height of the antenna, a patch antenna scheme or a direct reduction of the height of a dipole antenna element is mainly adopted in the industry. In order to realize the stability of the antenna and the reduction of the cost, the 5G antenna is designed by adopting a die-cast metal oscillator. The patch antenna and the die-cast metal resonator can be miniaturized, but the antenna impedance bandwidth is limited. Although the dipole antenna can achieve a sufficient bandwidth, the effect of reducing the antenna profile is insignificant. Therefore, how to reduce the profile of the antenna on the basis of ensuring the impedance bandwidth of the antenna is a problem to be solved by the 5G base station antenna.

Disclosure of Invention

The invention aims to overcome the defects of the prior art and provides a 5G low-profile broadband slot patch antenna, wherein through a unique slot radiation structure, an antenna oscillator has the structural advantages of low profile height, light weight and low cost under the condition of not increasing the size of the antenna, and meanwhile, the 5G low-profile broadband slot patch antenna realizes excellent working bandwidth, good port isolation and radiation performance.

In order to realize the purpose, the technical scheme provided by the invention is as follows: A5G low-profile broadband slot patch antenna comprises a bottom plate, a support and a substrate; the base plate passes through the support frame and erects in the bottom plate top, the support comprises two vertically crossed's backup pad, backup pad perpendicular to bottom plate and base plate, and the both sides of every backup pad are equallyd divide and do not are equipped with the feeder and the conductor of looks coupling, the bottom surface of bottom plate is equipped with the conductor layer, the top surface of base plate is equipped with the metal irradiator, be equipped with the triangle incision around the irradiator, be equipped with the vertically crossed gap on the intermediate position of irradiator, for the dual polarization function is realized to the antenna, the feeder and the conductor of two backup pads meet with four tip one-to-one in the vertically crossed gap respectively, the feeder and the conductor of a backup pad are connected to a gap both ends in vertical crossed gap promptly, the conductor is connected with the conductor layer.

Furthermore, the metal radiator is a square metal radiator with a centrosymmetric structure, four edges of the square metal radiator are provided with triangular notches, and the vertical cross gaps are arranged along the opposite angles of the square metal radiator.

Further, the gap width at the center intersection of the vertical intersection gaps is not consistent with the gap width at the end portions thereof, and the gap width from the end portions to the center intersection gradually increases.

Furthermore, a top pin is formed at the top of each of two ends of the supporting plate, two bottom pins are formed at the bottom of the supporting plate, the supporting plate is connected with the substrate and the bottom plate through the top pins and the bottom pins, a slot matched with the top pins is formed at each of four end parts of the vertical crossing gap, a feed line and a conductor of the supporting plate are connected with the vertical crossing gap at the corresponding slot position, two feet are formed at the bottom of the conductor, and the conductor is connected with the conductor layer through the feet.

Further, the feeder is formed by connecting metal sheets with different widths and is provided with a plurality of bending parts.

Compared with the prior art, the invention has the following advantages and beneficial effects:

1. in terms of structure, the 5G low-profile broadband slot patch antenna has the advantages of low profile height, light weight and low cost.

2. In terms of antenna performance, the 5G low-profile broadband slot patch antenna has excellent performances such as bandwidth, isolation, directional diagram and the like in a simulation result, namely the 5G low-profile broadband slot patch antenna realizes excellent working bandwidth, good port isolation and radiation performance.

In a word, the 5G low-profile broadband slot patch antenna has the advantages of low profile height, light weight and low cost through a unique slot radiation structure under the condition that the size of the antenna is not increased, and meanwhile, the antenna element also realizes excellent working bandwidth, good port isolation and radiation performance, and is suitable for a 5G large-scale array antenna to realize a Massive MIMO technology and a beam forming technology and a Sub-6GHz small base station antenna.

Drawings

Fig. 1 is a schematic structural diagram of a 5G low-profile broadband slot patch antenna.

Fig. 2 is a top view of a substrate for a 5G low-profile broadband slot patch antenna.

Fig. 3 is a schematic diagram of a support structure of a 5G low-profile broadband slot patch antenna.

Fig. 4 is a schematic diagram of port reflection coefficient and port polarization isolation simulation results of a 5G low-profile broadband slot patch antenna.

Fig. 5 is a schematic diagram of gain and horizontal plane half-power lobe width for a 5G low profile broadband slot patch antenna.

Fig. 6 is a horizontal plane radiation pattern of a 5G low-profile broadband slot patch antenna.

Detailed Description

The present invention will be described in further detail with reference to examples and drawings, but the embodiments of the present invention are not limited thereto.

Referring to fig. 1 to fig. 3, the 5G low-profile broadband slot patch antenna provided in this embodiment includes a bottom plate 1, a bracket, and a substrate 3; the substrate 3 is erected above the bottom plate 1 through a support, the support is composed of two support plates 2 which are vertically crossed, the support plates 2 are perpendicular to the bottom plate 1 and the substrate 3, a feed line 5 and a conductor 6 which are coupled are respectively arranged on two sides of each support plate 2, and a conductor layer 7 is arranged on the bottom surface of the bottom plate 1; the top surface of base plate 3 is equipped with central symmetrical structure's square metal irradiator 4, four edges of square metal irradiator 4 have all been opened a triangle incision 9, and the accessible changes the size of triangle incision 9 and adjusts the antenna performance, be equipped with perpendicular intersection gap 8 on the intermediate position of square metal irradiator 4, perpendicular intersection gap 8 sets up along square metal irradiator 4 diagonal angle, realizes dual polarization function for the antenna, the gap width of the center intersection of perpendicular intersection gap 8 is inconsistent rather than the gap width of tip department, and the gap width from tip to center intersection increases gradually, and the impedance matching of antenna is accomplished to the center intersection gap width that the accessible rationally set up perpendicular intersection gap 8.

The top of both ends of the supporting plate 2 is formed with a top pin 11, the bottom of the supporting plate 2 is formed with two bottom pins 10, the supporting plate 2 is connected with the substrate 3 and the bottom plate 1 through the top pin 11 and the bottom pin 10, so that the stability of the antenna structure is realized, four ends of the vertical crossing slot 8 are formed with a slot 12 matched with the top pin 11, the feeder line 5 and the conductor 6 of the supporting plate 2 are connected with the vertical crossing slot 8 at the corresponding slot 12, electromagnetic waves are transmitted onto the square metal radiator 4 from between the feeder line 5 and the conductor 6 and radiated out, the bottom of the conductor 6 is formed with two feet 13, and the conductor 6 is connected with the conductor layer 7 through the feet 13.

The feeder 5 is formed by connecting metal sheets with different widths, and can be provided with a plurality of bending parts, and the bending shapes and the number of the bending parts can be set according to actual conditions. It is easy to understand that the impedance matching of the circuit can be completed by reasonably setting the length and the width of each section of metal sheet. In detail, the feeding position of the vertical cross slot 8 on the square metal radiator 4 can be determined by setting the length of the feeding line 5, so that the effective feeding of the vertical cross slot 8 is completed.

The simulation results of the 5G low-profile broadband slot patch antenna of this embodiment are shown in fig. 4 to 6.

Fig. 4 shows the reflection coefficient and port isolation of the antenna port, and illustrates the following: the working frequency band of the 5G low-profile broadband slot patch antenna is 3.2-3.8GHz, and the isolation of the frequency band is more than 29dB.

Fig. 5 shows antenna gain and horizontal plane half power lobe width, as illustrated in the figure: the gain of the 5G low-profile broadband slot patch antenna in the embodiment at the working frequency band of 3.2-3.8GHz is greater than 8dBi, and the horizontal plane half-power lobe width at the working frequency band is 68 +/-4 degrees.

Fig. 6 is an antenna horizontal plane radiation pattern, illustrating from the figure: the 5G low-profile broadband slot patch antenna of the embodiment realizes stable radiation at the working frequency band of 3.2-3.8 GHz.

The above embodiments are preferred embodiments of the present invention, but the present invention is not limited to the above embodiments, and any other changes, modifications, substitutions, combinations, and simplifications which do not depart from the spirit and principle of the present invention should be construed as equivalents thereof, and all such modifications are intended to be included in the scope of the present invention.

Claims

1. The utility model provides a low profile broadband slot patch antenna of 5G which characterized in that: comprises a bottom plate, a bracket and a substrate; the antenna comprises a base plate, a support and a radiating body, wherein the base plate is erected above the base plate through the support, the support consists of two vertically crossed support plates, the support plates are perpendicular to the base plate and the base plate, a feeder line and a conductor which are coupled are respectively arranged on two sides of each support plate, a conductor layer is arranged on the bottom surface of the base plate, a metal radiating body is arranged on the top surface of the base plate, triangular notches are formed in the periphery of the radiating body, a vertical crossing gap is formed in the middle of the radiating body, a dual-polarization function is achieved for an antenna, the feeder lines and the conductors of the two support plates are respectively connected with four end portions of the vertical crossing gap in a one-to-one correspondence mode, namely two ends of one gap of the vertical crossing gap are connected with the feeder line and the conductor of one support plate, and the conductor is connected with the conductor layer; the width of the gap at the central intersection of the vertical crossed gaps is different from the width of the gap at the end part of the vertical crossed gaps, and the width of the gap from the end part to the central intersection is gradually increased; the top of the two ends of the supporting plate is provided with a top pin, the bottom of the supporting plate is provided with two bottom pins, the supporting plate is connected with the substrate and the bottom plate through the top pin and the bottom pins, the four ends of the vertical crossing gap are provided with a slot matched with the top pin, a feed line and a conductor of the supporting plate are connected with the vertical crossing gap at corresponding slot positions, the bottom of the conductor is provided with two feet, and the conductor is connected with the conductor layer through the feet; the feeder is formed by connecting metal sheets with different widths and is provided with a plurality of bending parts.

2. A 5G low-profile broadband slot patch antenna according to claim 1, wherein: the metal radiating body is a square metal radiating body with a central symmetrical structure, four edges of the square metal radiating body are provided with a triangular notch, and the vertical cross gap is arranged along the diagonal of the square metal radiating body.