A CPE array antenna capable of improving antenna isolation and performance

Abstract

The application provides a CPE array antenna capable of improving antenna isolation and performance, and belongs to the field of antenna structures. The CPE array antenna capable of improving antenna isolation and performance comprises two or more groups of antennas, and all the antennas form a ring-shaped antenna array; each group of antennas comprises two antennas which are completely identical in structure; the CPE array antenna comprises two groups of antennas with the same frequency band, namely a first group of antennas and a second group of antennas; the first group of antennas comprises a first antenna and a second antenna; the first antenna and the second antenna are arranged in parallel; a vertical center line of the first antenna and the second antenna is taken as a central axis plane; the second group of antennas is symmetrically arranged on both sides of the central axis plane; the first group of antennas and the second group of antennas are arranged vertically, and the distance between the first group of antennas and the second group of antennas is not less than 1 / 4 wavelength. The application has the advantages of compact structure, small mutual influence between antennas with the same frequency band, and improved antenna isolation and performance.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of antenna structure, in particular to a CPE array antenna capable of improving antenna isolation and performance. BACKGROUND

[0002] CPE is the abbreviation of Customer premises equipment, which is a device located in the terminal user's premises, usually a telephone or other services. Common ones are telephone, cable TV set-top box and digital subscriber line (DSL) router, etc. Due to communication requirements, the CPE device usually includes various antennas, and it is inevitable that the same frequency band antennas will be set on a CPE device at the same time. In order to avoid the influence between various antennas, the antennas are usually set at different positions of the CPE device, or isolation structures are set, so as to improve the isolation as much as possible. This kind of structure leads to too large antenna occupation volume and high cost. SUMMARY

[0003] In order to solve the problems in the prior art, the present application provides a CPE array antenna capable of improving antenna isolation and performance, which is designed into a ring-shaped antenna array, and each antenna is uniformly arranged on the circular ring, so that the structure is more compact, which is beneficial to the miniaturization of the product and reduces the product cost.

[0004] The CPE array antenna capable of improving antenna isolation and performance of the present application includes two or more groups of antennas, and all the antennas form a ring-shaped antenna array. Each group of antennas includes two antennas which are completely identical in structure. Among them, the CPE array antenna includes two groups of antennas with the same frequency band, which are a first group of antennas and a second group of antennas. The first group of antennas includes a first antenna and a second antenna, and the first antenna and the second antenna are arranged in parallel. A vertical center line of the first antenna and the second antenna is taken as a central axis plane, and the second group of antennas is symmetrically arranged on both sides of the central axis plane. The first group of antennas and the second group of antennas are arranged vertically, and the distance between them is not less than 1 / 4 wavelength.

[0005] Further, an antenna path is arranged above the first group of antennas and the second group of antennas respectively, and the cross section of the antenna path of the first group of antennas and the second group of antennas does not intersect.

[0006] Further, a third group of antennas and a fourth group of antennas different from or not intersecting the first group of antennas are further included, the third group of antennas and the fourth group of antennas are symmetrically arranged on both sides of the central axis surface, the second group of antennas, the third group of antennas and the fourth group of antennas are arranged in staggered layers not in one plane, and the second group of antennas, the third group of antennas and the fourth group of antennas do not intersect the extension line of the plane where the first group of antennas is located, and the second group of antennas, the third group of antennas and the fourth group of antennas do not overlap in the respective plane projections.

[0007] Further, the first group of antennas is a 5G antenna, including symmetrically arranged 5G main antennas and 5G diversity antennas, the second group of antennas is a 5G MIMO antenna, the third group of antennas is a 2.4G / 5.8G WIFI antenna, and the fourth group of antennas is a 4G antenna, including 4G main diversity antennas and 4G diversity antennas, and the 2.4G / 5.8G WIFI antenna is arranged between the 5G MIMO antenna and the 4G antenna.

[0008] Further, the 5G antenna includes a first antenna PCB board, a line structure arranged on the front of the first antenna PCB board, the line structure includes a bandwidth control ring, an antenna element upper arm and an antenna element lower arm arranged on the periphery of the bandwidth control ring, the bandwidth control ring is arranged at one end of the first antenna PCB board, the bandwidth control ring is provided with a partition gap towards the other end of the first antenna PCB board, the antenna element upper arm and the antenna element lower arm are arranged on both sides of the partition gap respectively, the antenna element upper arm is provided with a first feeding point and a groove near the partition gap and the bandwidth control ring, the antenna element lower arm is provided with a protrusion extending into the groove through the partition gap, and the protrusion is provided with a first feeding point.

[0009] Further, the width of the partition gap towards the other end of the antenna PCB board gradually increases, and the end of the first antenna PCB board is further provided with an antenna frequency control block at a distance from the end of the antenna element lower arm, and the antenna frequency control block is connected with the antenna element lower arm.

[0010] Further, the 5G MIMO antenna comprises a 5G MIMO3 antenna and a 5G MIMO4 antenna which are structurally identical, the 5G MIMO3 antenna comprises a second antenna PCB board, the first and second radiating elements are arranged on the second antenna PCB board, the first radiating element is provided with a first feeding point in the middle, two extension arms are arranged at one end of the first radiating element away from the second radiating element, a first coupling channel is arranged near the middle of the second radiating element, the feeding point is arranged at the bottom of the first coupling channel, the second radiating element is provided with an end portion extending into the first coupling channel, the end portion is provided with a second feeding point, and the second radiating element is further provided with a plurality of radiating extension ends which can be coupled with the extension arms of the first radiating element to form a coupling frequency of 3-5GHz, the frequencies controlled by the first and second radiating elements are superimposed on each other, and the working frequency is set to be between 2000-5500MHz.

[0011] Further, the 2.4G / 5.8G WIFI antenna comprises a third antenna PCB board, one end of the front surface of the third antenna PCB board is provided with a circuit structure, the circuit structure comprises an extension ground structure and an antenna frequency control structure connected with the extension ground structure, wherein a coupling gap is arranged between the extension ground structure and the antenna frequency control structure, a third feeding point and a third feeding point are arranged on both sides of the coupling gap, the extension ground structure comprises a ground structure and an extension ground extending towards the other end of the third antenna PCB board, and the extension ground and the ground structure are provided with a gap which is in communication with each other and the coupling gap.

[0012] Further, the 4G antenna comprises a fourth antenna PCB board, the fourth antenna PCB board is provided with a low-frequency radiating element, a high-frequency radiating element and a coupling radiating element, wherein a bandwidth expansion unit is arranged between the low-frequency radiating element and the coupling radiating element, a second coupling channel is arranged in the middle of the coupling radiating element, a fourth feeding point is arranged at the bottom of the second coupling channel, one end of the high-frequency radiating element extends into the second coupling channel, and a fourth feeding point corresponding to the fourth feeding point is arranged at the front end of the high-frequency radiating element, the coupling radiating units are symmetrically arranged on the front and back surfaces of the fourth antenna PCB board, and a plurality of through holes are uniformly arranged on the coupling radiating units to guide the front and back surfaces of the fourth antenna PCB board.

[0013] Further, it further comprises a ring-shaped fixing structure, the ring-shaped fixing structure is provided with mounting positions corresponding to the antennas, respectively, and four groups of eight antennas are fixed on the corresponding mounting positions.

[0014] Compared with the prior art, the present application has the beneficial effects that: the present application can improve the signal isolation degree between antennas in limited space by vertically arranging two groups of antennas with the same frequency or frequency overlap, and the distance between the two groups is not less than 1 / 4 wavelength, and the symmetrical design of double antennas effectively improves the signal strength and performance indicators of the antenna

[0015] The present application designs the CPE array antenna into a ring-shaped antenna array, and uniformly arranges each antenna on the side wall of the ring, so that the structure is more compact, which is beneficial to the miniaturization of the product and reduces the cost of the product. BRIEF DESCRIPTION OF DRAWINGS

[0016] In order to more clearly illustrate the scheme in the present application or the prior art, the drawings needed in the following embodiment or prior art description will be briefly introduced. Obviously, the drawings in the following description are some embodiments of the present application, and those skilled in the art can also obtain other drawings according to these drawings without creative labor.

[0017] Figure 1 and Figure 2 It is a structural schematic diagram of an embodiment of the present application.

[0018] Figure 3 It is a schematic diagram of the arrangement position of each antenna of an embodiment of the present application.

[0019] Figure 4 It is a schematic diagram of the structure of a 5G antenna.

[0020] Figure 5 It is a schematic diagram of the structure of a 5G MIMO antenna.

[0021] Figure 6 It is a schematic diagram of the structure of a 2.4G / 5.8G WIFI antenna.

[0022] Figures 7-8 It is a schematic diagram of the structure of a 4G antenna.

[0023] Figures 9-16 It is a curve diagram of the performance test results of each antenna. DETAILED DESCRIPTION

[0024] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs; the terminology used in the description herein is for describing particular embodiments only and is not intended to be limiting of the application; the description herein and the claims and the appended drawings are inclusive of what is commonly understood by terms such as "including", "having", "containing" and "comprising" and their conjugates as well as the singular and plural of each thereof. The use of "first", "second" and the like in the description herein is for clarity only and is not intended to limit the scope of the application. The terms "comprise", "comprising", "comprises", "include", "including", "includes", "contain", "containing", "contains", "characterized by", "characterized into" and the like are used herein to mean including, but not limited to.

[0025] Reference to "an embodiment" or "the embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment is included in at least one embodiment of the application. The appearances of the phrase "in one embodiment" or "in an embodiment" in various places in the specification are not necessarily all referring to the same embodiment, nor are they necessarily all directed to the same embodiment, or to a single alternative embodiment.

[0026] In order to make the technical personnel in the art better understand the application scheme, the technical solutions in the embodiments of the application will be clearly and completely described below in conjunction with the drawings.

[0027] As shown in Figures 1-3 The CPE array antenna capable of improving antenna isolation and performance of the application comprises four groups of antennas, which are a first group of antennas composed of antenna 1 and antenna 5, a second group of antennas composed of antenna 2 and antenna 6, a third group of antennas composed of antenna 3 and antenna 7, and a fourth group of antennas composed of antenna 4 and antenna 8. In this example, the four groups of antennas form a ring-shaped antenna array, and each group of antennas comprises two antennas that are completely identical in structure. In this example, the antenna 1 and the antenna 5 of the first group of antennas are parallel, and the front surfaces of the antennas are oppositely arranged. In this example, the antenna 2 and the antenna 6 of the second group of antennas have the same frequency or partially overlapping frequencies. In order to reduce the interference between them as much as possible, the second group of antennas to the fourth group of antennas are vertically symmetrically arranged on both sides of the central axis plane of the longitudinal vertical center line of the antenna 1 and the antenna 5.

[0028] Preferably, the second group of antennas, the third group of antennas, and the fourth group of antennas are arranged in staggered layers that are not in the same plane, and the second group of antennas, the third group of antennas, and the fourth group of antennas do not intersect the extension line of the plane where the first group of antennas is located. In this example, the three groups of antennas can be in a stepped shape, successively away from the central axis plane, or arranged in a way that the third group of antennas in the middle are far away, and the second group of antennas and the fourth group of antennas on both sides are close.

[0029] As one of the embodiments of the present application, the four groups of antennas in the embodiment are fixed at the end of the annular fixing structure 9, and the annular fixing structure 9 is provided with mounting positions 901 corresponding to the antennas, and the eight antennas are fixed in the corresponding mounting positions 901.

[0030] The embodiment can also be provided with baffles or housings around the eight antennas below the annular fixing structure 9, so as to form a complete whole, and the mounting structure can also be provided on the housing to realize the quick connection with the CPE device.

[0031] Of course, the mounting structure in the embodiment is not limited to the annular fixing structure 9, and the mounting positions can also be provided on the housing, or the effect of the present application can also be realized by directly fixing through screws.

[0032] As one of the preferred embodiments of the present application, the eight antenna circuit boards in the embodiment adopt the PCB-FR4 material, which is stable, will not be deformed and bent, and is easy to assemble. When assembling, the buckle positions are reserved on the housing, and the PCB can be directly buckled in the specified position, and the phenomenon of falling off will not occur.

[0033] As the third embodiment of the present application, the antennas are independent and not an integral whole before being mounted to the CPE device. The mounting structure can be arranged on the CPE device, and the antennas can be fixed in the specified positions according to the mounting positions of the mounting structure during installation, so as to realize the technical effect of the present application.

[0034] Of course, the present application is not limited to four groups of antennas, and can also be set to two groups, three groups or more groups according to the communication requirements of the CPE device.

[0035] The embodiment adopts four groups of symmetrical antennas, and the eight antennas form a ring-shaped antenna array. The paths and working frequencies of each group of symmetrical antennas are consistent, and the adjacent antennas are spaced apart by a certain distance, so as to meet the premise of isolation and non-interference, and the structure is more compact, which is beneficial to the miniaturization of the product, reduces the product cost, and the antennas are integrated by the fixing structure and separated from the CPE device, which is beneficial to the assembly of the product and improves the assembly efficiency of the product.

[0036] With the rapid development of 5G network, 5G antennas are increasingly applied to CPEs, and the antenna array in the example is also a 5G antenna array, specifically, the first group of antennas in the example is a 5G antenna, including a 5G main antenna and a 5G diversity antenna arranged symmetrically, the second group of antennas is a 5G MIMO antenna, the third group of antennas is a 2.4G / 5.8G WIFI antenna, and the fourth group of antennas is a 4G antenna, including a 4G main antenna and a 4G diversity antenna, and the 2.4G / 5.8G WIFI antenna is arranged between the 5G MIMO antenna and the 4G antenna.

[0037] The 5G MAIN (main) antenna and the 5G DIV (diversity) antenna in the example are symmetrically placed, and the distance between the two antennas is 79mm. This distance is much larger than 1 / 4 wavelength, so the influence between them is very small. The 5G MAIN / DIV antenna mainly interferes with the 5G MIMO antenna in the same frequency band. In order to reduce the interference between them and improve the isolation and antenna performance, the following three aspects are optimized:

[0038] 1. The 5G antenna and the 5G MIMO antenna are placed at 90 degrees, because from the principle and radiation pattern of the antenna, the two groups of antennas are placed at 90 degrees, which is the best (the shape of the radiation pattern is similar to an apple, and there is no signal at the two poles), the strongest is combined with the weakest part, and two groups form a spherical shape.

[0039] 2. The structure of the two groups of antennas is optimized, so that the lines on the top of the two groups of antennas are placed vertically, the 5G MAIN / DIV antenna path is placed on the top, and the 5G MIMO antenna path is placed below, and there is no intersection in the horizontal direction of the overall structure, which maximally reduces the interference between the two.

[0040] 3. The distance between the two groups of antennas meets the minimum requirement of λ / 4 (calculated at 5G MHz, λ / 4 = 15mm), and the distance between the two groups of antennas is not less than 15mm.

[0041] The 4G MAIN antenna and the 4G DIV antenna in the example are symmetrically placed, and the distance between the two is 80.6mm, which is exactly λ / 4 of the low frequency band, which improves the isolation between them and also improves the antenna gain, and the superposition of the two antennas makes the gain increase exponentially. The working frequency of the adjacent antenna (2.4G / 5.8G WIFI antenna and 5G MAIN / DIV antenna) is staggered, and a distance is also staggered, so the mutual influence is very small.

[0042] 5G MIMO3 antenna and 5G MIMO4 antenna are symmetrically placed, and the distance between the two is 60mm. This distance is much larger than its 1 / 4 wavelength, so the influence between each other is very small. The interference of 5G MIMO antenna mainly comes from the interference of adjacent antennas, and the interference between 5G MAIN / DIV antenna and the solution method has been shown above, the focus is to solve the interference between it and 2.4 / 5G WiFi antenna.

[0043] Due to the compactness of the layout, the distance between each antenna is as small as possible, and they are evenly distributed on the circular ring. The distance between 5G MIMO antenna and 2.4 / 5.8G WiFi antenna is 9.4mm, which is not enough. Therefore, the paths of the two groups of antennas are staggered in the up and down positions, that is, the distance between them is pulled apart from the vertical projection direction, and the circuit boards of each antenna are arranged in parallel, as much as possible to reduce the directional interference of each other's signals, and improve their isolation and performance.

[0044] 2.4 / 5.8G WiFi antenna and 2.4 / 5.8G WiFi antenna are symmetrically placed, and the distance between them is 78mm, which is much larger than its 1 / 4 wavelength, so the influence between each other is very small.

[0045] The specific structure of each antenna is described below. It should be understood that the main innovation of the present application is mainly in the arrangement method of the antenna array. Other structures of the antenna arranged according to the present application can also achieve the effect of improving the isolation capability and performance in a limited space.

[0046] As shown in Figure 4 , the 5G antenna of the present example is a single-sided design, including a first antenna PCB board, a circuit structure arranged on the front of the first antenna PCB board, the circuit structure including a bandwidth control ring 101, an antenna element upper arm 102 and an antenna element lower arm 103 arranged on the periphery of the bandwidth control ring 101, the bandwidth control ring 101 being arranged at one end of the first antenna PCB board, the bandwidth control ring being provided with a partition gap 107 towards the other end of the first antenna PCB board, the antenna element upper arm 102 and the antenna element lower arm 103 being arranged on the two sides of the partition gap 107 respectively, the antenna element upper arm 102 being provided with a first feed point 105 and a recess near the partition gap 107 and the bandwidth control ring 101, the antenna element lower arm 103 being provided with a protrusion extending into the recess through the partition gap 107, and the protrusion being provided with a first feed point 106.

[0047] The length and width of the outer circle of the bandwidth control ring 101 of the present example are equivalent to loading an inductor to the antenna, and the size of the blank inside the bandwidth control ring 101 is equivalent to loading a capacitor to the antenna, and the combination of the two forms an "LC" circuit, which controls the bandwidth of the antenna.

[0048] Preferably, in this example, the width of the dividing gap gradually increases towards the other end of the antenna PCB board from 107. An antenna frequency control block 104 is also provided at the end of the first antenna PCB board at a set distance from the end of the lower arm 103 of the antenna vibrator. The antenna frequency control block 104 is connected to the lower arm 103 of the antenna vibrator. A blank block 108 is provided at the end of the upper arm 102 of the antenna vibrator at a certain distance from the antenna frequency control block 104.

[0049] To achieve wide bandwidth operation in the 5G antenna of this invention, it is difficult to meet the requirements by simply adjusting the bandwidth control loop 101 and the antenna frequency control block 4. This invention optimizes the structure of the upper arm 102 and the lower arm 103 of the antenna vibrator and sets up a blank block 108, which plays a crucial role in the coupling of this invention. This enables more convenient and faster coupling under wide bandwidth, effectively reduces the size of the first antenna PCB board, and allows the bandwidth of this invention to reach 3.5GHz when the operating frequency is in the range of 2000 to 5500MHz.

[0050] like Figure 5 As shown, the 5G MIMO antenna in this example includes two antennas with identical structures: a 5G MIMO3 antenna and a 5G MIMO4 antenna. The MIMO3 antenna includes a second antenna PCB board. The second antenna PCB board has a first radiating element 201 and a second radiating element 202. The first radiating element 201 has a first feed point 203 in the middle. The end of the first radiating element 201 away from the second radiating element 202 has two extension arms 2011 and 2012 extending horizontally towards the second antenna PCB board. The middle part near the second radiating element 202 has a first coupling channel. The feed point 203 is located at the bottom of the first coupling channel. The second radiating element 202 has an end extending to the first coupling channel. The end has a second feed point 204. The second radiating element 202 also has four radiating extension ends 2021 and 2022. The radiating extension ends 2021 are located close to the first radiating element 201 and perpendicular to the extension arms 2011 and 2012. The number of radiating extension ends 2022 is three, extending in the opposite direction to the extension arms. The central radiating extension end is aligned with the second feed point 204. The other two radiating extension ends are located on either side of the central radiating extension end, with their lengths set according to the coupling effect. In this example, through a specific structural design, it can couple with the extension arms 2011 and 2012 of the first radiating element 201 to form a coupling frequency of 3 to 5 GHz. The frequencies controlled by the first radiating element 201 and the second radiating element 202 are superimposed, and the operating frequency is set between 2000 and 5500 MHz.

[0051] The two extension arms 2011 and 2012 of this invention effectively increase the ground length, while the radiating extension ends 2021 and 2022 are used to change the antenna wavelength and control the operating frequency. Since the 5G MIMO antenna and the 5G antenna operate at the same frequency, if their paths are similar or identical, their spacing is close, and their radiation patterns are the same, they will interfere with each other, resulting in poor isolation. Therefore, this invention, through structural design, makes the structures of the two antennas completely different, and places the 5G MIMO antenna at one end of the second PCB board. The circuit path of the 5G MIMO antenna does not intersect with the cross-section of the antenna path of the 5G antenna, thus placing them perpendicularly. This results in significant differences in their paths and radiation patterns, thereby reducing mutual interference between the antennas, improving their isolation, and enhancing the overall performance of the antennas.

[0052] like Figure 6 As shown, the 2.4G / 5.8G WIFI antenna in this example operates in two frequency bands: 2400-2500MHz and 5000-5900MHz. The 2.4G / 5.8G WIFI antenna of this invention includes a third antenna PCB board. One end of the front of the third antenna PCB board is provided with a circuit structure. The circuit structure includes an extended ground structure 301 and an antenna frequency control structure 302 connected to the extended ground structure 301. The antenna frequency control structure 302 is arranged in a gate shape, and the extended ground structure 301 is arranged inside the antenna frequency control structure 302. A coupling gap 306 is provided between the extended ground structure 301 and the antenna frequency control structure 302. A third feed point 305 and a third feed power point 304 are respectively provided on both sides of the coupling gap 306.

[0053] Preferably, in this example, the extended ground structure 301, in addition to the ground structure disposed inside the antenna frequency control structure 302 and presenting a semi-enclosed structure, also includes an extended ground 303 extending toward the other end of the third antenna PCB board. The extended ground is connected to the sidewall inside the antenna frequency control structure 302. A gap 307, which is interconnected with the extended ground 303 and the ground structure and communicates with the coupling gap 306, is provided in the middle. By controlling the gap 307, the present invention can control the bandwidth of the antenna. By setting the coupling gap, the antenna frequency can be coupled in the range of 5000-5900MHz. This frequency is very high, and its wavelength is very short, which places high demands on the width and length of the gap. By setting it into a semi-enclosed structure, the present invention can reduce the difficulty of setting the coupling gap 306.

[0054] like Figure 7 and Figure 8As shown, the example 4G antenna includes a double-sided circuit design fourth antenna PCB, which is provided with a low-frequency radiation element 401, a high-frequency radiation element 403, and a coupling radiation element 404, wherein a bandwidth expansion unit 402 is arranged between the low-frequency radiation element 401 and the coupling radiation element 404, a second coupling channel is arranged in the middle of the coupling radiation element 404, a fourth feeding point 407 is arranged at the bottom of the second coupling channel, one end of the high-frequency radiation element 403 extends into the second coupling channel, and a fourth feeding point 408 corresponding to the fourth feeding point 407 is arranged at the front end of the high-frequency radiation element 403, and the coupling radiation elements 404 are symmetrically arranged on the front and back surfaces of the fourth antenna PCB, and two ground connection structures 409 and 410 identical to the structure of the front surface of the fourth antenna PCB are further arranged on the back surface of the fourth antenna PCB, and eight through holes 405 for connecting the front and back surfaces of the fourth antenna PCB are further uniformly arranged on the coupling radiation elements 404.

[0055] The working frequency of the low-frequency radiation element 401 of the application is 700-960MHz, the bandwidth expansion unit 402 in the middle of the snake shape is equivalent to loading a group of LC circuits between the front and back of the low frequency through the combination of length and gap, which has the effect of widening the low-frequency bandwidth and controlling the frequency point, so that it works within the specified frequency. The working frequency of the high-frequency radiation element 403 of the example is 1700-2200MHz, and the length controls the frequency band, and the gap and shape between each element around control the bandwidth. The coupling radiation element 404 arranged on the front and back surfaces can increase the length of the ground (the length of the reference ground for the antenna is λ / 4), which can improve the performance of the antenna, and the eight through holes 405 make the circuit paths on the front and back surfaces connected together to form a whole.

[0056] Test verification

[0057] The CPE array antenna capable of improving the isolation and performance of the antenna of the application is arranged on the CPE device, and a darkroom + network analyzer 5701B is used to test the 3D passive efficiency, the gain and efficiency of each antenna are tested, and then the antenna gain value is used to illustrate the superior effect of the application. Antenna gain refers to: under the condition that the input power is equal, the ratio of the power density of the signal generated by the actual antenna and the ideal radiation element at the same point in space, which can quantitatively describe the degree of concentration of input power of an antenna, and is one of the most important parameters for selecting a base station antenna.

[0058] As Figure 9 and Figure 10As shown, the operating frequency of the 5G antenna of this invention is 2000-5500MHz. This invention selects the lowest and highest frequency bands for testing. The test results show that the gain of this invention is in the range of 0-3dB in the frequency band of 2000-2700MHz, and in the high frequency band of 3300-5000MHz, the gain is in the range of -1.00-6dB.

[0059] like Figures 11-12 As shown, the operating frequency of the 5G MIMO antenna of this invention is also 2000-5500MHz. This invention selects the lowest and highest frequency bands for testing. The test results show that the gain of this invention is in the range of 0.5-4.2dB in the 2000-2700MHz band, and in the high-frequency band of 3300-5000MHz, the gain is in the range of -0.5-5.5dB.

[0060] The above two results show that the antenna array arrangement of the present invention can effectively avoid interference between 5G antennas and 5G MIMO antennas in the same frequency band, with good isolation and effective improvement of antenna performance.

[0061] like Figure 13 and Figure 14 As shown, the operating frequencies of the 2.4G / 5.8G WIFI antenna of the present invention are 2400~2500MHz and 5000~5900MHz. The present invention tested the two frequency bands respectively. The test results show that the gain value is stable at 1dB in the 2.4G frequency band and between -0.5 and 3.5dB in the 5.8G frequency band.

[0062] like Figures 15-16 As shown, the operating frequencies of the 4G antenna of this invention are 700-960MHz and 1700-2200MHz. This invention tested the two frequency bands respectively. The test results show that in the low frequency band, the gain is in the range of -0.7 to 3dB, and in the high frequency band, the gain is in the range of 1.2 to 4.8dB.

[0063] As can be seen from the performance of the four antennas, the array antenna of the present invention, through its unique layout, can improve the signal isolation between antennas within a limited space. The dual-antenna symmetrical design effectively improves the signal strength and various performance indicators of the antenna.

[0064] The specific embodiments described above are preferred embodiments of the present invention and are not intended to limit the specific scope of the present invention. The scope of the present invention includes, but is not limited to, these specific embodiments. All equivalent changes made in accordance with the present invention are within the protection scope of the present invention.

Claims

1. A CPE array antenna capable of improving antenna isolation and performance, characterized in that: The CPE array antenna comprises two or more groups of antennas, all the antennas form a ring-shaped antenna array, each group of antennas comprises two antennas which are structurally identical, wherein the CPE array antenna comprises two groups of antennas with the same frequency band, namely a first group of antennas and a second group of antennas, the first group of antennas comprises a first antenna and a second antenna, the first antenna and the second antenna are arranged in parallel, a central line vertically to the first antenna and the second antenna is taken as a central axis plane, the second group of antennas is symmetrically arranged on both sides of the central axis plane, the first group of antennas and the second group of antennas are vertically arranged, and the distance between the first group of antennas and the second group of antennas is not less than 1 / 4 wavelength, The first group of antennas is a 5G antenna, the 5G antenna comprises a first antenna PCB board, a circuit structure arranged on the front of the first antenna PCB board, the circuit structure comprises a bandwidth control ring, an antenna element upper arm and an antenna element lower arm arranged on the periphery of the bandwidth control ring, the bandwidth control ring is arranged at one end of the first antenna PCB board, the bandwidth control ring is provided with a split gap towards the other end of the first antenna PCB board, the antenna element upper arm and the antenna element lower arm are arranged on both sides of the split gap respectively, the antenna element upper arm is provided with a first feed point and a groove near the split gap and the bandwidth control ring, the antenna element lower arm is provided with a protrusion extending into the groove through the split gap, and the protrusion is provided with a first feed point.

2. The CPE array antenna capable of improving antenna isolation and performance according to claim 1, characterized in that: The first group of antennas and the second group of antennas are respectively provided with antenna paths above, and the cross sections of the antenna paths of the first group of antennas and the second group of antennas do not intersect.

3. The CPE array antenna capable of improving antenna isolation and performance according to claim 2, characterized in that: The first group of antennas and the second group of antennas are respectively provided with antenna paths above, and the cross sections of the antenna paths of the first group of antennas and the second group of antennas do not intersect.

4. The CPE array antenna capable of improving antenna isolation and performance according to claim 3, characterized in that: The first group of antennas and the second group of antennas are respectively provided with antenna paths above, and the cross sections of the antenna paths of the first group of antennas and the second group of antennas do not intersect.

5. The CPE array antenna capable of improving antenna isolation and performance according to claim 4, characterized in that: The 5G antenna comprises a 5G main antenna and a 5G diversity antenna arranged symmetrically, the second group of antennas is a 5G MIMO antenna, the third group of antennas is a 2.4G / 5.8G WIFI antenna, and the fourth group of antennas is a 4G antenna comprising a 4G main diversity antenna and a 4G diversity antenna, the 2.4G / 5.8G WIFI antenna is arranged between the 5G MIMO antenna and the 4G antenna. The width of the split gap towards the other end of the antenna PCB board gradually increases, and an antenna frequency control block is further arranged at a position with a certain distance from the end of the first antenna PCB board and the end of the antenna element lower arm, and the antenna frequency control block is connected with the antenna element lower arm.

6. The CPE array antenna capable of improving antenna isolation and performance according to claim 4, characterized in that: The 5G MIMO antenna comprises 5G MIMO3 and 5G MIMO4 antennas with the same structure, the 5G MIMO3 antenna comprises a second antenna PCB plate, the first and second radiating elements are arranged on the second antenna PCB plate, the first radiating element is provided with a first feeding point in the middle part, two extension arms are arranged at one end of the first radiating element away from the second radiating element, a first coupling channel is arranged in the middle part close to the second radiating element, the feeding point is arranged at the bottom of the first coupling channel, the second radiating element is provided with an end part extending to the first coupling channel, the end part is provided with a second feeding point, and the second radiating element is further provided with a plurality of radiating extension ends which can be coupled with the extension arms of the first radiating element to form a coupling frequency of 3-5GHz, the frequencies controlled by the first and second radiating elements are superimposed on each other, and the working frequency is set to be between 2000-5500MHz.

7. The CPE array antenna capable of improving antenna isolation and performance according to claim 4, characterized in that: The 2.4G / 5.8G WIFI antenna comprises a third antenna PCB plate, one end of the front surface of the third antenna PCB plate is provided with a circuit structure, the circuit structure comprises an extension ground structure and an antenna frequency control structure connected with the extension ground structure, wherein a coupling gap is arranged between the extension ground structure and the antenna frequency control structure, a third feeding point and a third feeding point are arranged on both sides of the coupling gap, the extension ground structure comprises a ground structure and an extension ground extending towards the other end of the third antenna PCB plate, and the extension ground and the ground structure are provided with a gap which is in communication with each other and the coupling gap.

8. The CPE array antenna capable of improving antenna isolation and performance of claim 4, wherein: The 4G antenna comprises a fourth antenna PCB plate, the fourth antenna PCB plate is provided with a low-frequency radiating element, a high-frequency radiating element and a coupling radiating element, wherein a bandwidth expansion unit is arranged between the low-frequency radiating element and the coupling radiating element, a second coupling channel is arranged in the middle part of the coupling radiating element, a fourth feeding point is arranged at the bottom of the second coupling channel, one end of the high-frequency radiating element extends into the second coupling channel, and a fourth feeding point corresponding to the fourth feeding point is arranged at the front end of the high-frequency radiating element, the coupling radiating elements are symmetrically distributed on the front and back surfaces of the fourth antenna PCB plate, and a plurality of through holes are uniformly arranged on the coupling radiating elements and can lead to the front and back surfaces of the fourth antenna PCB plate.

9. The CPE array antenna capable of improving antenna isolation and performance according to any one of claims 1-8, characterized in that: Further comprising a ring-shaped fixing structure, the ring-shaped fixing structure is provided with mounting positions corresponding to the antennas, respectively, and four groups of eight antennas are fixed on the corresponding mounting positions.

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