Series-fed antenna, dual-polarized antenna array and communication system

Abstract

The utility model discloses a series-fed antenna, a dual-polarized antenna array and a communication system, and relates to the technical field of wireless communication, and the series-fed antenna comprises an antenna unit array, a dielectric plate, a series-fed structural member and a floor. The antenna unit array is attached to the upper surface of the dielectric plate, the series-feed structural member is attached to the lower surface of the dielectric plate, the upper surface of the dielectric plate is arranged on the side away from the floor, and the lower surface of the dielectric plate is arranged on the side close to the floor; the series feed structural member is provided with an upper coupling line and a lower coupling line which are in mirror symmetry, the upper coupling line is coupled with the upper half part of the antenna unit array, and the lower coupling line is coupled with the lower half part of the antenna unit array. According to the utility model, the influence of signal frequency change on the antenna performance is effectively reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of wireless communications, and in particular to a series-fed antenna, a dual-polarized antenna array and a communication system. Background Art

[0002] In the antenna design of wireless communication systems, the traditional series feeding method is widely used due to its simple structure and high cost-effectiveness. However, with the continuous development of wireless communication technology, users' requirements for the performance of series-fed antennas are becoming increasingly stringent.

[0003] At present, during the series feeding process of a pure series-fed antenna, changes in the transmission signal frequency will cause a significant change in the phase delay by affecting the phase constant of the transmission line. This change in phase delay will form an equidistant phase gradient between the antenna elements in the series-fed antenna, which will in turn cause the antenna beam to scan. This undesired beam scanning will cause the maximum beam to shift, which will seriously affect the performance of the series-fed antenna, such as gain reduction, pattern distortion, and difficulty in achieving dual polarization.

[0004] Therefore, how to reduce the impact of signal frequency changes on antenna performance is a technical problem that needs to be solved urgently. Utility Model Content

[0005] The main purpose of the utility model is to provide a series-fed antenna, a dual-polarization antenna array and a communication system, aiming to reduce the influence of signal frequency changes on antenna performance.

[0006] To achieve the above object, the utility model proposes a series-fed antenna, which comprises: an antenna unit array, a dielectric plate, a series-fed structural member and a floor;

[0007] The antenna unit array is mounted on the upper surface of the dielectric plate, the series feed structure is mounted on the lower surface of the dielectric plate, the upper surface of the dielectric plate is arranged on a side away from the floor, and the lower surface of the dielectric plate is arranged on a side close to the floor;

[0008] The series-fed structure is provided with a mirror-symmetrical upper coupling line and a lower coupling line, wherein the upper coupling line is coupled with the upper half of the antenna unit array, and the lower coupling line is coupled with the lower half of the antenna unit array.

[0009] In one embodiment, the upper coupling line includes a first vertical polarization series line, a second vertical polarization series line, and a first vertical polarization connection line;

[0010] The first vertical polarization series line is parallel to the second vertical polarization series line;

[0011] The first vertical polarization series line is vertically arranged at a first end of the first vertical polarization connection line, and the second vertical polarization series line is vertically arranged at a second end of the first vertical polarization connection line.

[0012] In one embodiment, the lower coupling line includes a third vertical polarization series line that is mirror-symmetric to the first vertical polarization series line, a fourth vertical polarization series line that is mirror-symmetric to the second vertical polarization series line, and a second vertical polarization connecting line that is mirror-symmetric to the first vertical polarization connecting line;

[0013] The first vertical polarization connection line and the second vertical polarization connection line are connected in parallel to form a vertical polarization parallel line of the series-fed structural component;

[0014] The third vertical polarization series line is parallel to the fourth vertical polarization series line;

[0015] The third vertical polarization series line is vertically arranged at the first end of the second vertical polarization connection line, and the fourth vertical polarization series line is vertically arranged at the second end of the second vertical polarization connection line.

[0016] In one embodiment, the antenna unit array includes a plurality of antenna units, and a plurality of upper half array central axes are provided on the lower surface of the dielectric plate;

[0017] A mirror-symmetrical lower half array central axis is provided in the vertical direction of each upper half array central axis, and each upper half array central axis and the mirror-symmetrical lower half array central axis respectively overlap with the antenna array central axis formed by the central axis points of the plurality of antenna units in the same column;

[0018] The first vertical polarization series line and the second vertical polarization series line are respectively arranged on different upper half array central axes, and the third vertical polarization series line and the fourth vertical polarization series line are respectively arranged on different lower half array central axes.

[0019] In one embodiment, the middle point of the first vertical polarization connection line and the middle point of the second vertical polarization connection line constitute a vertical polarization feeding point;

[0020] The series feed structure is provided with a vertical polarization parallel link, and the vertical polarization parallel link is that the first end of the first vertical polarization connection line is electrically connected to the second end of the first vertical polarization connection line via the vertical polarization feeding point, and the first end of the second vertical polarization connection line is electrically connected to the second end of the second vertical polarization connection line via the vertical polarization feeding point.

[0021] In one embodiment, the series-fed structure is further provided with a vertically polarized series link;

[0022] The vertical polarization series link is that the vertical polarization feeding point is electrically connected to the first vertical polarization series line through the first end of the first vertical polarization connecting line; or,

[0023] The vertical polarization feeding point is electrically connected to the second vertical polarization series line through the second end of the first vertical polarization connecting line; or,

[0024] The vertical polarization feeding point is electrically connected to the third vertical polarization series line through the first end of the second vertical polarization connecting line; or,

[0025] The vertical polarization feeding point is electrically connected to the fourth vertical polarization series line through the second end of the second vertical polarization connecting line.

[0026] In one embodiment, the series-fed antenna further includes a horizontally polarized feeding network;

[0027] The horizontal polarization feed network passes through the horizontal polarization feed point in the vertical direction to form a vertical center axis of the dielectric plate, the horizontal polarization feed network close to the left side of the vertical center axis constitutes a left coupling line, and the horizontal polarization feed network close to the right side of the vertical center axis constitutes a right coupling line;

[0028] The horizontal polarization feeding point is arranged at a position where the upper surface of the dielectric plate overlaps with the vertical polarization feeding point.

[0029] In one embodiment, the left coupling line is coupled to the left half of the antenna element array, and the right coupling line is coupled to the right half of the antenna element array; wherein,

[0030] The left half of the antenna unit array is a plurality of antenna units arranged close to the left side of the vertical central axis, and the right half of the antenna unit array is a plurality of antenna units arranged close to the right side of the vertical central axis.

[0031] In addition, the utility model also proposes a dual-polarization antenna array, which at least includes any one of the series-fed antennas described above.

[0032] In addition, the utility model also provides a communication system, wherein the dual-polarization antenna array at least includes the above-mentioned dual-polarization antenna array.

[0033] The series-fed antenna provided in the utility model can effectively reduce the influence of signal frequency changes on antenna performance. Specifically, the antenna unit array provided in the utility model is mounted on the upper surface of the dielectric plate, and the series-feed structure is mounted on the lower surface of the dielectric plate, and the upper surface of the dielectric plate is arranged on the side away from the floor, and the lower surface of the dielectric plate is arranged on the side close to the floor, which can not only effectively isolate the antenna unit array from the series-feed structure to avoid potential electromagnetic interference, but also improve the stability of signal transmission of the antenna unit array; then, when the frequency of the transmission signal of the antenna unit array changes, it is coupled with the upper half of the antenna unit array through the upper coupling line in the series-feed structure, and is coupled with the lower half of the antenna unit array through the lower coupling line in the series-feed structure that is mirror-symmetrical to the upper coupling line, so that the upper half of the antenna unit array and the lower half of the antenna unit array form opposite phase difference gradients, that is, the upper half of the antenna unit array and the lower half of the antenna unit array respectively synthesize beams in opposite directions, thereby ensuring that the maximum beam synthesized by the antenna unit array always points to the top of the antenna unit array, avoiding the risk of offset caused by the existing series-feed beam scanning, thereby effectively reducing the impact of signal frequency changes on antenna performance. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.

[0035] Figure 1 It is a conventional series-fed single-polarized microstrip antenna array;

[0036] Figure 2 A schematic diagram of the structure of an embodiment of a series-fed antenna provided by the utility model;

[0037] Figure 3 A top view of an embodiment of a series-fed antenna provided by the utility model;

[0038] Figure 4 It is a schematic diagram of a series-feed structure involved in an embodiment of the utility model;

[0039] Figure 5 A schematic diagram of the bandwidth involved in the series-fed antenna provided by the utility model;

[0040] Figure 6 The vertical polarization pattern of the antenna involved in the embodiment of the utility model;

[0041] Figure 7A schematic diagram of a horizontal polarization feed network involved in an embodiment of the utility model;

[0042] Figure 8 This is the horizontal polarization pattern of the antenna involved in the embodiment of the present utility model.

[0043] Description of Figure Numbers:

[0044] T1, antenna unit array; 10, dielectric board; 20, series-fed structural member; 30, floor; 201, upper coupling line; 202, lower coupling line; 2-1, first vertical polarization connecting line; 2-2, second vertical polarization series line; 2-3, first vertical polarization series line; 2-1', second vertical polarization connecting line; 2-2', fourth vertical polarization series line; 2-3', third vertical polarization series line; 401, left coupling line; 402, right coupling line; 4-1', first horizontal polarization connecting line; 4-2', second horizontal polarization series line; 4-3', first horizontal polarization series line; 4-1, second horizontal polarization connecting line; 4-2, fourth horizontal polarization series line; 4-3, third horizontal polarization series line.

[0045] The realization of the purpose, functional features and advantages of the utility model will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0046] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0047] It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back...), the directional indications are only used to explain the relative position relationship, movement status, etc. between the components in a certain specific posture. If the specific posture changes, the directional indications will also change accordingly.

[0048] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the utility model, the descriptions of "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features limited to "first" and "second" may explicitly or implicitly include at least one of the features. In addition, if "and / or" or "and / or" appears in the full text, its meaning includes three parallel solutions. Taking "A and / or B" as an example, it includes solution A, solution B, or solutions that satisfy both A and B. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of ordinary technicians in this field to implement. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by the utility model.

[0049] In the antenna design of wireless communication systems, the traditional series feeding method is widely used due to its simple structure and high cost-effectiveness. However, with the rapid development of wireless communication technology, the requirements for antenna performance are becoming increasingly stringent.

[0050] Reference Figure 1 , Figure 1 It is a conventional series-fed single-polarized microstrip antenna array. Figure 1 The single-polarized microstrip antenna array shown is a direct contact form of serial feeding method. However, when the frequency of the transmitted signal changes, the phase constant of the transmission line will also change, which leads to a significant change in phase delay. This change in phase delay will form an equal phase gradient between the antenna elements, which will in turn cause the scanning phenomenon of the antenna beam. This undesired beam scanning will cause the maximum beam to shift, which will seriously affect the performance of the antenna, such as gain reduction, pattern distortion, etc. In addition, the direct contact form of serial feeding often leads to a higher overall antenna Q value. The Q value is an important parameter to measure the performance of the antenna, which reflects the ratio between the antenna's radiated energy and stored energy. A high Q value means that the antenna stores more energy and radiates relatively less energy, resulting in a narrower impedance bandwidth and gain bandwidth of the antenna. In communication systems that require wide-band coverage, this narrow bandwidth will greatly limit the application range of the antenna. In addition, this direct contact form of serial feeding method is not easy to achieve dual polarization. Because it will cause the symmetry of the antenna current distribution to be severely weakened, the port isolation is relatively poor, and it has a greater impact on the pattern.

[0051] In summary, in order to solve the above technical defects to improve the performance of the series-fed antenna and meet the high requirements of modern wireless communication systems for antenna performance, the utility model introduces parallel feeding into the series feeding, which enables the antenna units on both sides of the parallel feeding to form opposite phase gradients, thereby avoiding the disadvantages of pattern scanning. In other words, the utility model proposes a series-fed antenna, a dual-polarization antenna array and a communication system.

[0052] In one embodiment of the present invention, please refer to Figure 2 , Figure 2 The schematic diagram of the structure of an embodiment of the series-fed antenna provided by the utility model. The series-fed antenna comprises: an antenna unit array T1, a dielectric plate 10, a series-fed structural member 20 and a floor 30;

[0053] The antenna unit array T1 is mounted on the upper surface of the dielectric plate 10, the series feed structure 20 is mounted on the lower surface of the dielectric plate 10, the upper surface of the dielectric plate 10 is arranged on a side away from the floor 30, and the lower surface of the dielectric plate 10 is arranged on a side close to the floor 30;

[0054] The series-fed structure 20 is provided with a mirror-symmetrical upper coupling line 201 and a lower coupling line 202 . The upper coupling line 201 is coupled with the upper half of the antenna element array T1 , and the lower coupling line 202 is coupled with the lower half of the antenna element array T1 .

[0055] In this embodiment, refer to Figure 2 In the present application, a series-fed structure 20 formed by setting a mirror-symmetrical upper coupling line 201 and a lower coupling line 202 is mounted on the lower surface of the dielectric plate 10, and extends to both ends of the lower surface of the dielectric plate 10, so as to achieve coupling between the upper coupling line 201 and the upper half of the antenna unit array T1 and coupling between the lower coupling line 202 and the lower half of the antenna unit array T1. In other words, the present application acts on the antenna unit array T1 mounted on the upper surface of the dielectric plate 10 through this upper and lower coupling method to achieve feeding.

[0056] It should be noted that the dielectric plate 10 provided in the present application can be understood as an insulating layer, which refers to a polytetrafluoroethylene layer with a thickness of 0.75 mm. The series-feeding structure 20 provided in the present application can be understood as a vertically polarized feeding network.

[0057] Antenna element array T1 can be understood as Figure 2The eight-unit patch antenna array shown, or the 16-unit patch antenna array and more. In addition, the eight-unit patch antenna array is composed of antenna units T1-1, antenna units T1-2, antenna units T1-3, antenna units T1-4, antenna units T1-5, antenna units T1-6, antenna units T1-7 and antenna units T1-8 arranged in an array, and each antenna unit can be understood as a radiation patch, that is, a radiator. The above implementation content is only a feasible implementation method of the present application, and the present application does not make any limitation here.

[0058] Exemplarily, when the frequency of the transmission signal changes, the series-fed antenna of the present invention adopts a unique upper and lower coupling mechanism so that the upper coupling line 201 in the series-fed structure 20 is coupled with the upper half of the antenna unit array T1, and the lower coupling line 202, which is mirror-symmetrical to the upper coupling line 201, is coupled with the lower half of the antenna unit array T1, thereby forming an opposite phase difference gradient between the upper half and the lower half of the antenna unit array T1. This means that when the antenna unit array T1 is working, no matter how the frequency of the transmission signal of the antenna unit array T1 changes, the maximum beam composed of the upper and lower halves of the antenna unit array T1, which will be synthesized in opposite directions, will always point directly above the antenna unit array T1, thereby avoiding the risk of the series-fed antenna beam in the traditional method being scanned as the frequency changes, thereby effectively reducing the impact of signal frequency changes on antenna performance.

[0059] Further, in some feasible embodiments, referring to Figures 3 to 4 , Figure 3 A top view of an embodiment of a series-fed antenna provided by the utility model, Figure 4 Schematic diagram of a series-feed structure 20 according to an embodiment of the present utility model. The upper coupling line 201 includes a first vertical polarization series line 2-3, a second vertical polarization series line 2-2 and a first vertical polarization connection line 2-1;

[0060] The first vertical polarization series line 2-3 is parallel to the second vertical polarization series line 2-2;

[0061] The first vertical polarization series line 2-3 is vertically arranged at a first end of the first vertical polarization connection line 2-1, and the second vertical polarization series line 2-2 is vertically arranged at a second end of the first vertical polarization connection line 2-1.

[0062] Further, in some other feasible embodiments, referring to Figures 3 to 4, the lower coupling line 202 includes a third vertical polarization series line 2-3' that is mirror-symmetrical to the first vertical polarization series line 2-3, a fourth vertical polarization series line 2-2' that is mirror-symmetrical to the second vertical polarization series line 2-2, and a second vertical polarization connection line 2-1' that is mirror-symmetrical to the first vertical polarization connection line 2-1;

[0063] The first vertical polarization connection line 2-1 and the second vertical polarization connection line 2-1' are connected in parallel to form a vertical polarization parallel line of the series feeding structure 20;

[0064] The third vertical polarization series line 2-3' is parallel to the fourth vertical polarization series line 2-2';

[0065] The third vertical polarization series line 2-3' is vertically arranged at the first end of the second vertical polarization connection line 2-1', and the fourth vertical polarization series line 2-2' is vertically arranged at the second end of the second vertical polarization connection line 2-1'.

[0066] In this embodiment, refer to Figure 4 The first vertical polarization connection line 2-1 and the second vertical polarization connection line 2-1' are connected in parallel to form a vertical polarization parallel line of the series-fed structural component 20, wherein the first vertical polarization connection line 2-1 is the upper half of the vertical polarization parallel line, and the second vertical polarization connection line 2-1' is the lower half of the vertical polarization parallel line.

[0067] Further, in some feasible embodiments, referring to Figures 3 to 4 , the antenna unit array T1 includes a plurality of antenna units, and a plurality of upper half array central axes are arranged on the lower surface of the dielectric plate 10;

[0068] A mirror-symmetrical lower half array central axis is provided in the vertical direction of each upper half array central axis, and each upper half array central axis and the mirror-symmetrical lower half array central axis respectively overlap with the antenna array central axis formed by the central axis points of the plurality of antenna units in the same column;

[0069] The first vertical polarization series line 2-3 and the second vertical polarization series line 2-2 are respectively arranged on different upper array central axes, and the third vertical polarization series line 2-3' and the fourth vertical polarization series line 2-2' are respectively arranged on different lower array central axes.

[0070] Further, in some feasible embodiments, referring to 4, the middle point of the first vertical polarization connection line 2-1 and the middle point of the second vertical polarization connection line 2-1' constitute a vertical polarization feeding point;

[0071] The series feed structure 20 is provided with a vertical polarization parallel link, and the vertical polarization parallel link is that the first end of the first vertical polarization connection line 2-1 is electrically connected to the second end of the first vertical polarization connection line 2-1 via the vertical polarization feeding point, and the first end of the second vertical polarization connection line 2-1' is electrically connected to the second end of the second vertical polarization connection line 2-1' via the vertical polarization feeding point.

[0072] In this embodiment, the series-feed structure 20 provided in the present application is fed by two parallel lines on the same layer (i.e., the upper coupling line 201 and the lower coupling line 202 which are mirror-symmetrical). Figure 4 In the present application, the first vertical polarization connection line 2-1 and the first vertical polarization connection line 2-1 are divided into two from their respective midpoints by setting the vertical polarization feeding point, and then Figure 4 The direction of the series current is to feed the upper and lower sides respectively, and the series feeding part is a very long metal strip, which feeds the antenna units in turn. That is, the present application realizes feeding by coupling up and down with the antenna unit array T1 located on the upper surface of the dielectric plate 10, thereby being able to well avoid the Figure 3 The horizontal polarization feeding network formed by the mirror-symmetrical left coupling line 401 and the right coupling line 402 interferes with each other, thereby avoiding damage to the structure of the horizontal polarization feeding network.

[0073] It should be noted that, refer to Figures 3 to 4 The first vertical polarization series line 2-3, the second vertical polarization series line 2-2, the third vertical polarization series line 2-3' and the fourth vertical polarization series line 2-2' shown are all provided with a vertical polarization feed network bending part, which is used to tune the gain of the series-fed antenna and ensure the current is in phase.

[0074] Reference Figures 3 to 4 The first vertical polarization connection line 2-1 and the second vertical polarization connection line 2-1' shown in the figure both use a stepped width, so that the impedance matching of the vertical polarization feed network of the antenna element array T1 can be adjusted, which well expands the Figure 5 The impedance bandwidth of the series-fed antenna is shown in Figure 2. In addition, the vertical polarization direction of the antenna of the vertically polarized feed network is as follows: Figure 6 As shown, Figure 6 This is the vertical polarization pattern of the antenna involved in the embodiment of the utility model.

[0075] Further, in some other feasible embodiments, referring to Figure 3 as well as Figure 7 , Figure 7 Schematic diagram of a horizontal polarization feeding network involved in an embodiment of the utility model. The series-fed antenna also includes a horizontal polarization feeding network;

[0076] The horizontal polarization feeding network passes through the horizontal polarization feeding point in the vertical direction to form the vertical center axis of the dielectric plate 10, the horizontal polarization feeding network close to the left side of the vertical center axis constitutes a left coupling line 401, and the horizontal polarization feeding network close to the right side of the vertical center axis constitutes a right coupling line 402;

[0077] The horizontal polarization feeding point is arranged at a position where the upper surface of the dielectric plate 10 overlaps with the vertical polarization feeding point.

[0078] Further, in some feasible embodiments, referring to Figure 3 as well as Figure 7 , the left coupling line 401 is coupled to the left half of the antenna element array T1, and the right coupling line 402 is coupled to the right half of the antenna element array T1; wherein,

[0079] The left half of the antenna unit array T1 is a plurality of antenna units arranged close to the left side of the vertical central axis, and the right half of the antenna unit array T1 is a plurality of antenna units arranged close to the right side of the vertical central axis.

[0080] In this embodiment, the left coupling line 401 includes a first horizontal polarization series line 4-3', a first horizontal polarization connection line 4-1' and a second horizontal polarization series line 4-2' arranged in sequence along the vertical direction. The left coupling line 401 also includes a third horizontal polarization series line 4-3, a second horizontal polarization connection line 4-1 and a fourth horizontal polarization series line 4-2 arranged in sequence along the vertical direction, wherein the first horizontal polarization series line 4-3' is mirror-symmetrical to the third horizontal polarization series line 4-3, the second horizontal polarization series line 4-2' is mirror-symmetrical to the fourth horizontal polarization series line 4-2, and the first horizontal polarization connection line 4-1' is mirror-symmetrical to the second horizontal polarization connection line 4-1.

[0081] Exemplarily, the horizontal polarization feeding network provided in the present application is also fed by two parallel lines on the same layer (i.e., the mirror-symmetrical left coupling line 401 and the right coupling line 402). Figure 3 as well as Figure 7 In the present application, the first horizontal polarization connection line 4-1' and the second horizontal polarization connection line 4-1 are respectively divided into two from their respective midpoints by setting the horizontal polarization feeding point, and then series feed is conducted to the upper and lower sides, and the series feed part is still a parallel double line. Figure 3 as well as Figure 7 The T-shaped structure shown feeds the radiator. In addition, the horizontal polarization direction of the antenna of the horizontal polarization feed network is as follows Figure 8 As shown, Figure 8 This is the horizontal polarization pattern of the antenna involved in the embodiment of the present utility model.

[0082] In summary, this utility model proposes a new series-parallel dual-polarization antenna array based on parallel double wires, which achieves full coverage of the Wi-Fi 5G frequency band and has good gain and stable radiation pattern (i.e. Figure 6 The vertical polarization pattern of the antenna is shown as well as Figure 8 Specifically, the antenna unit array T1 provided in the utility model is mounted on the upper surface of the dielectric plate 10, and the series feeding structure 20 is mounted on the lower surface of the dielectric plate 10, which can effectively avoid the interference between the series feeding structure 20 (i.e., the vertical polarization feeding network) and the horizontal polarization feeding network provided on the upper surface of the dielectric plate, and at the same time realize the vertical polarization coupling feeding, thereby ensuring the stability of the signal transmission of the antenna unit array T1; then, when the frequency of the transmission signal of the antenna unit array T1 changes, the upper coupling line 201 in the series feeding structure 20 and the upper half of the antenna unit array T1 are connected. The lower coupling line 202 in the series-fed structure 20 is coupled to the lower half of the antenna unit array T1, which is mirror-symmetrical to the upper coupling line 201, so that the upper half of the antenna unit array T1 and the lower half of the antenna unit array T1 form an opposite phase difference gradient, that is, the upper half of the antenna unit array T1 and the lower half of the antenna unit array T1 respectively synthesize beams in opposite directions, thereby ensuring that the maximum beam synthesized by the antenna unit array T1 always points to the top of the antenna unit array T1, thereby effectively reducing the impact of signal frequency changes on antenna performance. In addition, the series-fed antenna set by the utility model can more conveniently integrate the horizontal polarization feed network, so as to cooperate with the series-fed structure 20 to form a dual-polarization feed network to achieve a dual-polarization function.

[0083] The utility model also proposes a dual-polarized antenna array, which includes at least the above-mentioned series-fed antenna. The specific structure of the series-fed antenna refers to the above-mentioned embodiment. Since the dual-polarized antenna array adopts all the technical solutions of all the above-mentioned embodiments, it has at least all the beneficial effects brought by the technical solutions of the above-mentioned embodiments, which will not be repeated here one by one.

[0084] In this embodiment, refer to Figure 3 The dual-polarized antenna array can be understood as a dual-polarized feed network that does not require drilling holes or changing layers, formed by the cooperation between the vertical polarization feed network and the horizontal feed network. This dual-polarized feed network can not only be used for 8-unit patch antenna arrays, but can also be expanded to 16-unit patch antenna arrays and more.

[0085] The utility model also proposes a communication system, which at least includes the above-mentioned dual-polarized antenna array. The specific structure of the dual-polarized antenna array refers to the above-mentioned embodiment. Since the communication system adopts all the technical solutions of all the above-mentioned embodiments, it at least has all the beneficial effects brought by the technical solutions of the above-mentioned embodiments, which will not be repeated here one by one.

[0086] The above description is only an exemplary implementation of the present invention, and does not limit the patent scope of the present invention. All equivalent structural changes made by using the contents of the present invention specification and drawings under the technical concept of the present invention, or directly / indirectly used in other related wireless communication technology fields are included in the patent protection scope of the present invention.

Claims

1. A series-fed antenna, characterized in that: The series-fed antenna comprises: an antenna unit array, a dielectric plate, a series-fed structural member and a floor; The antenna unit array is mounted on the upper surface of the dielectric plate, the series feed structure is mounted on the lower surface of the dielectric plate, the upper surface of the dielectric plate is arranged on a side away from the floor, and the lower surface of the dielectric plate is arranged on a side close to the floor; The series-fed structure is provided with a mirror-symmetrical upper coupling line and a lower coupling line, wherein the upper coupling line is coupled with the upper half of the antenna unit array, and the lower coupling line is coupled with the lower half of the antenna unit array.

2. The series-fed antenna according to claim 1, characterized in that: The upper coupling line includes a first vertical polarization series line, a second vertical polarization series line and a first vertical polarization connection line; The first vertical polarization series line is parallel to the second vertical polarization series line; The first vertical polarization series line is vertically arranged at a first end of the first vertical polarization connection line, and the second vertical polarization series line is vertically arranged at a second end of the first vertical polarization connection line.

3. The series-fed antenna according to claim 2, characterized in that: The lower coupling line includes a third vertical polarization series line that is mirror-symmetrical to the first vertical polarization series line, a fourth vertical polarization series line that is mirror-symmetrical to the second vertical polarization series line, and a second vertical polarization connecting line that is mirror-symmetrical to the first vertical polarization connecting line; The first vertical polarization connection line and the second vertical polarization connection line are connected in parallel to form a vertical polarization parallel line of the series-fed structural component; The third vertical polarization series line is parallel to the fourth vertical polarization series line; The third vertical polarization series line is vertically arranged at the first end of the second vertical polarization connection line, and the fourth vertical polarization series line is vertically arranged at the second end of the second vertical polarization connection line.

4. The series-fed antenna according to claim 3, characterized in that: The antenna unit array includes a plurality of antenna units, and a plurality of upper half array central axes are arranged on the lower surface of the dielectric plate; A mirror-symmetrical lower half array central axis is provided in the vertical direction of each upper half array central axis, and each upper half array central axis and the mirror-symmetrical lower half array central axis respectively overlap with the antenna array central axis formed by the central axis points of the plurality of antenna units in the same column; The first vertical polarization series line and the second vertical polarization series line are respectively arranged on different upper half array central axes, and the third vertical polarization series line and the fourth vertical polarization series line are respectively arranged on different lower half array central axes.

5. The series-fed antenna according to claim 3, characterized in that: The middle point of the first vertical polarization connection line and the middle point of the second vertical polarization connection line constitute a vertical polarization feeding point; The series feed structure is provided with a vertical polarization parallel link, and the vertical polarization parallel link is that the first end of the first vertical polarization connection line is electrically connected to the second end of the first vertical polarization connection line via the vertical polarization feeding point, and the first end of the second vertical polarization connection line is electrically connected to the second end of the second vertical polarization connection line via the vertical polarization feeding point.

6. The series-fed antenna according to claim 5, characterized in that: The series feed structure is also provided with a vertically polarized series link; The vertical polarization series link is that the vertical polarization feeding point is electrically connected to the first vertical polarization series line through the first end of the first vertical polarization connecting line; or, The vertical polarization feeding point is electrically connected to the second vertical polarization series line through the second end of the first vertical polarization connecting line; or, The vertical polarization feeding point is electrically connected to the third vertical polarization series line through the first end of the second vertical polarization connecting line; or, The vertical polarization feeding point is electrically connected to the fourth vertical polarization series line through the second end of the second vertical polarization connecting line.

7. The series-fed antenna according to claim 5, characterized in that: The series-fed antenna also includes a horizontally polarized feeding network; The horizontal polarization feed network passes through the horizontal polarization feed point in the vertical direction to form a vertical center axis of the vertical polarization parallel line, the horizontal polarization feed network close to the left side of the vertical center axis constitutes a left coupling line, and the horizontal polarization feed network close to the right side of the vertical center axis constitutes a right coupling line; The horizontal polarization feeding point is arranged at a position where the upper surface of the dielectric plate overlaps with the vertical polarization feeding point.

8. The series-fed antenna according to claim 7, characterized in that: The left coupling line is coupled to the left half of the antenna element array, and the right coupling line is coupled to the right half of the antenna element array; wherein, The left half of the antenna unit array is a plurality of antenna units arranged close to the left side of the vertical central axis, and the right half of the antenna unit array is a plurality of antenna units arranged close to the right side of the vertical central axis.

9. A dual-polarized antenna array, characterized in that: The dual-polarized antenna array comprises at least the series-fed antenna according to any one of claims 1 to 8.

10. A communication system, characterized in that: The dual-polarized antenna array at least includes the dual-polarized antenna array described in claim 9.

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