CN216773517U

CN216773517U - 5G array antenna

Info

Publication number: CN216773517U
Application number: CN202122810592.1U
Authority: CN
Inventors: 符峰; 牛宝星
Original assignee: Shenzhen Electric Connector Technology Co Ltd
Current assignee: Shenzhen Electric Connector Technology Co Ltd
Priority date: 2021-11-17
Filing date: 2021-11-17
Publication date: 2022-06-17
Anticipated expiration: 2031-11-17

Abstract

The utility model discloses a 5G array antenna, comprising: the power division feed assembly comprises a substrate, a first feed network and a second feed network are printed on the upper surface of the substrate, and a metal ground and a plurality of feed points are arranged on the lower surface of the substrate; the radiation unit assembly consists of a plurality of dual-polarized radiation oscillators, and the dual-polarized radiation oscillators are fixedly connected with the power division feed assembly; the dual-polarized radiation oscillators form a sub-array, the dual-polarized radiation oscillators are composed of a first dielectric sheet and a second dielectric sheet which can be installed in a cross mode, and radiation arms, grounding microstrip lines and feeding microstrip lines are arranged on the first dielectric sheet and the second dielectric sheet. Compared with the prior art, the utility model has the beneficial effects that: the method and the device achieve the purpose of obtaining a wide horizontal plane beam scanning width in a wide frequency band range, and simultaneously obtain a good side lobe suppression value and a high gain value.

Description

5G array antenna

Technical Field

The utility model relates to the technical field of antennas, in particular to a 5G array antenna.

Background

As the frequency band of the 5G network moves up, the single base station coverage capability is weakened. Meanwhile, with the rapid increase of the data traffic of the 5G user, the number of base stations and the number of antennas used are greatly increased. Therefore, the 5G base station will adopt Massive MIMO array antennas on a large scale, and adopt tens or hundreds of antenna units to simultaneously serve up to tens of mobile terminals on the basis of limited time and frequency resources. However, the conventional 5G antenna has a disadvantage of being difficult to realize a wider beam scanning width, a higher gain value, better antenna side lobe suppression, and the like, and thus is still to be improved.

SUMMERY OF THE UTILITY MODEL

The embodiment of the application provides a 5G array antenna, has realized: a wide horizontal plane beam scanning width is obtained in a wide frequency band range, and a good side lobe suppression value and a high gain value are obtained at the same time.

In order to achieve the purpose, the utility model adopts the technical scheme that:

a 5G array antenna, comprising:

the power division feed assembly comprises a substrate, a first feed network and a second feed network are printed on the upper surface of the substrate, and a metal ground and a plurality of feed points are arranged on the lower surface of the substrate;

the radiation unit assembly consists of a plurality of dual-polarized radiation oscillators, and the dual-polarized radiation oscillators are fixedly connected with the power division feed assembly; the dual-polarized radiating oscillators form a sub-array, the dual-polarized radiating oscillators are composed of a first dielectric sheet and a second dielectric sheet which can be installed in a cross mode, a first radiating arm and a first grounding microstrip line are arranged on the front side of the first dielectric sheet, a first feeding microstrip line is arranged on the reverse side of the first dielectric sheet, a second radiating arm and a second grounding microstrip line are arranged on the front side of the second dielectric sheet, and a second feeding microstrip line is arranged on the reverse side of the second dielectric sheet; the first radiation arm and the second radiation arm are parallel to the substrate, the first grounding microstrip line and the second grounding microstrip line are perpendicular to the substrate, and the first feed microstrip line and the second feed microstrip line are orthogonal and perpendicular.

Preferably, the power distribution feed component is composed of a plurality of power distribution subunit, and the power distribution subunit is composed of a power divider in the form of a coplanar microstrip line.

Preferably, the radiating element assembly is composed of M × N dual-polarized radiating elements, and three dual-polarized radiating elements form a sub-array; the power distribution feed assembly is composed of (M multiplied by N)/3 power distribution subunit.

Preferably, the lengths of the input ports of the first feed network and the second feed network are 1/4 wavelengths of central frequency points, and the length of the output port is 1/16 wavelengths of central frequency points.

Preferably, the lengths of the first grounding microstrip line and the second grounding microstrip line are both 1/4 wavelengths of central frequency points.

Preferably, the longitudinal spacing of the dual-polarized radiation oscillator is the wavelength of 2.1-2.2 central frequency points, and the transverse spacing is the wavelength of 0.5-0.6 central frequency points.

Preferably, the operating frequency range of the 5G array antenna is: 3700-3980 MHz.

Preferably, the first dielectric sheet and/or the second dielectric sheet are provided with protrusions, and the substrate is provided with through holes for the insertion of the protrusions.

The utility model has the beneficial effects that: the power distribution feed assembly comprises a substrate, a first feed network and a second feed network are printed on the upper surface of the substrate, and a metal ground and a plurality of feed points are arranged on the lower surface of the substrate; the radiating element assembly consists of a plurality of dual-polarized radiating oscillators, and the dual-polarized radiating oscillators are fixedly connected with the power division feed assembly; the dual-polarized radiating oscillators form a sub-array, the dual-polarized radiating oscillators comprise a first dielectric sheet and a second dielectric sheet which can be installed in a cross manner, a first radiating arm and a first grounding microstrip line are arranged on the front surface of the first dielectric sheet, a first feeding microstrip line is arranged on the back surface of the first dielectric sheet, a second radiating arm and a second grounding microstrip line are arranged on the front surface of the second dielectric sheet, and a second feeding microstrip line is arranged on the back surface of the second dielectric sheet; the first radiation arm and the second radiation arm are parallel to the substrate, the first grounding microstrip line and the second grounding microstrip line are perpendicular to the substrate, and the first feed microstrip line and the second feed microstrip line are orthogonal and perpendicular. Therefore, a wider horizontal plane beam scanning width is obtained in a wider frequency band range, and a better side lobe suppression value and a higher gain value are obtained at the same time.

Drawings

Fig. 1 is a schematic perspective view of a 5G array antenna according to an embodiment of the present invention;

fig. 2 is a schematic structural diagram of a lower surface of a substrate of a 5G array antenna according to an embodiment of the present invention;

fig. 3 is an exploded schematic view of a dual polarized radiating element of a 5G array antenna according to an embodiment of the present invention;

fig. 4 is an exploded view of a sub-array of a 5G array antenna according to an embodiment of the present invention;

FIG. 5a is the gain test data of the 5G array antenna according to the embodiment of the present invention when the horizontal plane beam scanning width reaches +56 ° within the working frequency range of 3700-;

FIG. 5b is the gain test data of the 5G array antenna according to the embodiment of the present invention when the horizontal plane beam scanning width reaches-56 ° in the 3700-;

FIG. 5c is the gain test data when the horizontal plane beam scanning width of the 5G array antenna reaches 0 ° in the working frequency range of 3700-;

fig. 6 is a measured reflection parameter curve of a 5G array antenna according to an embodiment of the present invention.

Detailed Description

The embodiment of the application provides a 5G array antenna, and solves the technical problems that in the prior art, a wider beam scanning width, a higher gain value and better antenna side lobe suppression are difficult to realize.

In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. This invention may, however, be embodied in many different forms than those specifically described herein, and it will be apparent to those skilled in the art that many more modifications are possible without departing from the spirit and scope of the utility model.

In the description of the present invention, it is to be understood that the terms "first", "second" and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implying any number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, such as two, three, etc., and "several" means one and more, such as one, two, three, etc., unless specifically limited otherwise.

Reference numerals in the drawings of the specification include:

100	5G array antenna	24	First radiation arm
				11	Substrate	25	First grounding microstrip line
12	First feed network	26	First feed microstrip line
				13	Second feed network	27	Second radiation arm
14	Metal floor	28	Second grounding microstrip line
				15	Feed point	29	Second feed microstrip line
21	Dual-polarized radiating oscillator	30	Sub-array
				22	First dielectric sheet	41	Projection
23	Second dielectric sheet	42	Through hole

As shown in fig. 1 to 4, the embodiment of the present application:

a 5G array antenna 100, comprising:

the power division feed assembly comprises a substrate 11, wherein a first feed network 12 and a second feed network 13 are printed on the upper surface of the substrate 11, and a metal ground 14 and a plurality of feed points 15 are arranged on the lower surface of the substrate;

the radiating element assembly consists of a plurality of dual-polarized radiating oscillators 21, and the dual-polarized radiating oscillators 21 are fixedly connected with the power division feed assembly; a plurality of the dual-polarized radiation oscillators 21 form a sub-array 30, the dual-polarized radiation oscillators 21 are composed of a first dielectric plate 22 and a second dielectric plate 23 which can be installed in a crisscross manner, a first radiation arm 24 and a first grounding microstrip line 25 are arranged on the front surface of the first dielectric plate 22, a first feed microstrip line 26 is arranged on the back surface of the first dielectric plate, a second radiation arm 27 and a second grounding microstrip line 28 are arranged on the front surface of the second dielectric plate 23, and a second feed microstrip line 29 is arranged on the back surface of the second dielectric plate; the first radiation arm 24 and the second radiation arm 27 are parallel to the substrate 11, the first ground microstrip 25 and the second ground microstrip 28 are perpendicular to the substrate 11, and the first feed microstrip 26 is orthogonal to the second feed microstrip 29.

It should be noted that rectangular mounting grooves may be formed in the first dielectric sheet 22 and the second dielectric sheet 23, so that the two dielectric sheets may be perpendicularly mounted together, and the mounting process is simple.

The feeding mode is back feeding by arranging the plurality of feeding points 15 on the lower surface of the 5G array antenna 100, and when other signals on the equipment are connected at the feeding points 15, the signals are successfully and effectively isolated through the metal ground 14, so that the electromagnetic wave interference of the other signals on the first feeding network 12, the second feeding network 13 and the radiation unit components is reduced.

Preferably, the radiation element assembly is composed of M × N dual-polarized radiation oscillators 21, and three dual-polarized radiation oscillators 21 form a sub-array 30; the power distribution feed assembly is composed of (M multiplied by N)/3 power distribution subunit.

Preferably, the lengths of the input ports of the first feed network 12 and the second feed network 13 are 1/4 wavelengths of central frequency points, and the length of the output port is 1/16 wavelengths of central frequency points.

Preferably, the lengths of the first grounding microstrip line 25 and the second grounding microstrip line 28 are both 1/4 wavelengths of central frequency points.

Preferably, the longitudinal spacing of the dual-polarized radiating oscillator 21 is 2.1-2.2 central frequency point wavelengths, and the transverse spacing is 0.5-0.6 central frequency point wavelengths.

Preferably, the first dielectric sheet 22 and/or the second dielectric sheet 23 are provided with protrusions 41, and the substrate 11 is provided with through holes 42 for the protrusions to be inserted. It will be appreciated that the projections 41 and the through holes 42 mate with one another.

The configuration of 96 dual-polarized radiating elements and 64 1 × 3 feed networks is exemplified:

the upper surface of the substrate 11 is provided with 32 first feeding networks 12 and 32 second feeding networks 13, and the lower surface of the substrate 11 is provided with a metal ground 14 and 64 feeding points 15.

The radiating element assembly is composed of 96 dual-polarized radiating elements 21, a sub-array 30 is composed of 3 dual-polarized radiating elements 21, and each dual-polarized radiating element 21 is composed of a first dielectric sheet 22 and a second dielectric sheet 23 which are installed in a crisscross mode.

Two first radiation arms 24 are arranged on the front surface of the first dielectric sheet 22, the first radiation arms 24 are parallel to the substrate 11, two first grounding microstrip lines 25 are further arranged on the front surface of the first dielectric sheet 22, the first grounding microstrip lines 25 are perpendicular to the substrate 11, similarly, two second radiation arms 27 are arranged on the front surface of the second dielectric sheet 23, the second radiation arms 27 are parallel to the substrate 11, two second grounding microstrip lines 28 are further arranged on the front surface of the second dielectric sheet 23, and the second grounding microstrip lines 28 are perpendicular to the substrate 11; the first radiating arm 24 and the second radiating arm 27 have a length of 1/2 central frequency points and are parallel to the metal ground 14 on the substrate 11, so that the beam width of the dual-polarized radiating element 21 can be controlled advantageously, and the radiation beam of the dual-polarized radiating element 21 can reach a wider width.

The lengths of the first grounding microstrip line 25 and the second grounding microstrip line 28 are 1/4 wavelengths of central frequency points, and when the protrusion 41 on the dual-polarized radiation oscillator 21 is inserted into the through hole 42 on the substrate 11, the first grounding microstrip line 25 and the second grounding microstrip line 28 are connected with the metal ground 14 on the lower surface of the substrate 11, so as to form a microstrip balun structure. Therefore, the free flow of current between the two radiating arms on the dielectric sheet can be realized, the current balance between the radiating arms is ensured, and the impedance of the dual-polarized radiating oscillator 21 is easier to realize matching.

A first feed microstrip line 26 is arranged on the reverse side of the first dielectric sheet 22, and a second feed microstrip line 29 is arranged on the reverse side of the second dielectric sheet 23; the first feeding microstrip line 26 and the second feeding microstrip line 29 are orthogonal and vertical, and are respectively connected with the first feeding network 12 and the second feeding network 13.

The radiation arm is arranged to be parallel to the metal ground 14 on the substrate 11, and the first feed microstrip line 26 and the second feed microstrip line 29 on the dielectric sheet are used for orthogonal vertical coupling feed to generate radiation current and radiation signals, so that the dual-polarized radiation oscillator 21 generates orthogonal dual polarization, a wider beam width on a horizontal plane is realized, and the horizontal plane beam scanning width of the whole 5G array antenna is effectively guaranteed. It should be noted that the first feed microstrip line 26 and the second feed microstrip line 29 are orthogonal, and a certain distance is kept in the direction perpendicular to the substrate 11 at the orthogonal position, so that the isolation of the dual-polarized radiation oscillator and the cross polarization ratio of the antenna array can be effectively improved.

As shown in fig. 4, the first feed network 12 and the second feed network 13 have substantially the same structure, and the signals pass through first-order power dividers of 1/4 center frequency point wavelengths at the input ports of the first feed network 12 and the second feed network 13, so as to divide the incoming signals into three paths of signals with equal power; the current paths on the microstrip lines are increased through the wiring modes of c1 and d1, so that the phases of the three output ports are kept consistent, and a basic guarantee is provided for realizing scanning of the whole array antenna; the impedance at the signal output port is finely adjusted by increasing or reducing the width of the microstrip line at the signal output ports of the c2, d2 and d3 close to the dual-polarized radiating oscillator, so that the amplitude of the signal output port is changed, the inconsistency of the amplitudes of the output ports after various routing lines is reduced, the amplitude values of the three signal output ports in the first feed network 12 and the second feed network 13 are kept consistent, and meanwhile, the amplitude values of the three output ports are finely adjusted by adding open-circuit branches of the wavelengths of 1/16 central frequency points near the signal output ports of the first feed network 12 and the second feed network 13, so that the consistent amplitude values are kept.

A1 x3 sub-array 30 is formed by three dual-polarized radiation oscillators 21, a first feed network 12 and a second feed network 13, and 8 sub-arrays 30 are sequentially arranged in the longitudinal direction at equal intervals of the wavelength with the array element spacing of 0.5-0.6 central frequency points, so that the side lobe level value of the horizontal plane can be effectively reduced, and the side lobe level value of the whole 5G array antenna 100 can be effectively inhibited when the larger beam scanning width is realized. The 4 sub-arrays 30 are sequentially arranged in the transverse direction at the same wavelength and the same distance with the array element spacing of 2.1-2.2 central frequency points, so that the antenna gain of the whole antenna array can be effectively superposed, the maximum gain of the whole antenna array can reach more than 25dBi, and the effect of long-distance radiation is realized.

As shown in fig. 5a, 5b, 5c and 6, the scanning width of the horizontal plane beam in the working frequency range of 3700-; the whole array antenna obtains a higher gain value larger than 25dBi, and a better side lobe value larger than 9dBi is obtained when the horizontal plane realizes the beam scanning width of minus 56 degrees to plus 56 degrees.

The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

The above-mentioned embodiments only express the embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the utility model. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.

Claims

1. A5G array antenna, comprising:

2. The 5G array antenna of claim 1, wherein the power splitting feed assembly is comprised of a plurality of power splitting sub-elements comprised of power splitters in the form of coplanar microstrip lines.

3. The 5G array antenna of claim 2, wherein the radiating element assembly is comprised of M x N dual polarized radiating elements, three of which form a sub-array; the power distribution feed assembly is composed of (M multiplied by N)/3 power distribution subunit.

4. The 5G array antenna of claim 3, wherein the input ports of the first feed network and the second feed network are 1/4 wavelengths of central frequency points in length, and the output ports are 1/16 wavelengths of central frequency points in length.

5. The 5G array antenna according to claim 4, wherein the lengths of the first grounding microstrip line and the second grounding microstrip line are both 1/4 wavelengths of central frequency points.

6. The 5G array antenna of claim 5, wherein the longitudinal spacing of the dual-polarized radiating elements is 2.1-2.2 wavelengths of central frequency points, and the transverse spacing is 0.5-0.6 wavelengths of central frequency points.

7. The 5G array antenna of claim 6, wherein the operating frequency range of the 5G array antenna is: 3700-3980 MHz.

8. The 5G array antenna according to any one of claims 1-7, wherein the first dielectric sheet and/or the second dielectric sheet is provided with a protrusion, and the substrate is provided with a through hole for the protrusion to be inserted.