An antenna

Abstract

An embodiment of the present invention discloses an antenna comprising a reflector, at least two radiating arrays whose operating frequency bands are within a first preset frequency band, and multiple parasitic radiators. Each of the at least two radiating arrays comprises multiple radiating units. Each of the at least two radiating arrays is electrically disposed on the reflector along the length of the reflector, and the multiple parasitic radiators are disposed between adjacent two of the at least two radiating arrays. This application can reduce the horizontal beamwidth of a multi-array antenna.

Description

[0001] This application is a divisional application of Chinese patent application No. 201780090591.8, filed on May 16, 2017, entitled "An Antenna". Technical Field

[0002] This invention relates to the field of wireless communication technology, and in particular to an antenna. Background Technology

[0003] With the popularization of wireless communication systems, multi-array antennas have been widely used. Currently, multi-array antennas mainly consist of a reflector and multiple radiating arrays operating within a preset frequency band, with the multiple radiating arrays mounted on the reflector.

[0004] Because adjacent radiating arrays operating within the same preset frequency band have coupling effects, when one radiating array is working, the generated radiated electromagnetic waves (which can be called the main radiated electromagnetic waves) will excite the adjacent radiating arrays to generate parasitic radiated electromagnetic waves. The superposition of these parasitic and main radiated electromagnetic waves will cause the horizontal beamwidth of the multi-array antenna to widen, thus causing the radiation pattern of the multi-array antenna to fail to meet the requirements of the wireless communication system. Summary of the Invention

[0005] To reduce the horizontal beamwidth of a multi-array antenna, this invention provides an antenna. The antenna includes a reflector, at least two radiating arrays operating within a first preset frequency band, and multiple parasitic radiators. Each of the at least two radiating arrays includes multiple radiating elements, wherein:

[0006] Each of the at least two radiation arrays is electrically disposed on the reflector along the length of the reflector, and the plurality of parasitic radiators are disposed between two adjacent radiation arrays in the at least two radiation arrays.

[0007] In one possible implementation, the plurality of parasitic radiators includes a plurality of transverse parasitic radiators;

[0008] Each of the plurality of transverse parasitic radiators is arranged along the width direction of the reflective device; the plurality of transverse parasitic radiators are respectively arranged on both sides of each pair of radiating elements contained in two adjacent columns of radiating arrays, wherein each column of radiating arrays in two adjacent columns contains one radiating element of each pair of radiating elements.

[0009] In this way, by setting lateral parasitic radiators on both sides of each radiating element in two adjacent columns of radiating arrays, when a column of radiating arrays is working, the lateral parasitic radiators can generate parasitic electromagnetic waves with directions opposite to those generated by the adjacent columns of radiating arrays. This means that the parasitic electromagnetic waves generated by the lateral parasitic radiators can cancel out the parasitic electromagnetic waves generated by the adjacent columns of radiating arrays, thereby reducing the horizontal plane width of the multi-array antenna and thus ensuring that the radiation pattern of the multi-array antenna meets the requirements of the wireless communication system.

[0010] In one possible implementation, the distance from the midpoint of the vertical projection of each lateral parasitic radiator onto the bottom surface of the reflector to the line connecting the corresponding pair of radiating elements of each lateral parasitic radiator is a preset distance value; the vertical projection of each lateral parasitic radiator onto the bottom surface of the reflector is parallel to the line connecting the corresponding pair of radiating elements of each lateral parasitic radiator.

[0011] In one possible implementation, the midpoint of the vertical projection of each lateral parasitic radiator onto the bottom surface of the reflector is on the line connecting the midpoints of the corresponding pair of radiating elements of each lateral parasitic radiator.

[0012] In one possible implementation, the height of the apex of each transverse parasitic radiator from the bottom surface of the reflector is a value within a preset range containing 0.25 times the wavelength, wherein the wavelength is the average wavelength of the wavelengths of the two adjacent columns of the radiation array corresponding to each transverse parasitic radiator.

[0013] In one possible implementation, the effective length of each transverse parasitic radiator is a value in the range of 0.8 to 2.5 times the wavelength, where the wavelength is the average wavelength of the wavelengths of the two adjacent columns of the radiation array corresponding to each transverse parasitic radiator.

[0014] In one possible implementation, the plurality of parasitic radiators includes a plurality of longitudinal parasitic radiators;

[0015] Each of the plurality of longitudinal parasitic radiators is arranged along the length of the reflector; the plurality of longitudinal parasitic radiators are respectively arranged between the two radiation units contained in each radiation unit pair.

[0016] In one possible implementation, the midpoint of the vertical projection of each longitudinal parasitic radiator onto the bottom surface of the reflector coincides with the midpoint of the line connecting the corresponding pair of radiating elements of each longitudinal parasitic radiator, and the vertical projection of each longitudinal parasitic radiator onto the bottom surface of the reflector is perpendicular to the line connecting the corresponding pair of radiating elements of each longitudinal parasitic radiator.

[0017] In one possible implementation, the height of the apex of each longitudinal parasitic radiator from the bottom surface of the reflector is a value within a preset range containing 0.25 times the wavelength, wherein the wavelength is the average wavelength of the wavelengths of the two adjacent columns of radiation arrays corresponding to each longitudinal parasitic radiator.

[0018] In one possible implementation, the effective length of each longitudinal parasitic radiator is a value in the range of 0.8 to 2.5 times the wavelength, where the wavelength is the average wavelength of the wavelengths of the two adjacent columns of the radiation array corresponding to each longitudinal parasitic radiator.

[0019] In one possible implementation, each of the at least two columns of radiation arrays comprises a bipolar dipole radiation element; or...

[0020] Each of the at least two radiation arrays contains a single-polarized dipole radiation element.

[0021] In one possible implementation, the first preset frequency band is a low-frequency preset frequency band; or, the first preset frequency band is a high-frequency preset frequency band.

[0022] The beneficial effects of the technical solution provided by the embodiments of the present invention are as follows:

[0023] In this embodiment of the invention, a parasitic radiator is set between two adjacent columns of radiating arrays. When a column of radiating arrays is working, the parasitic radiator can generate a parasitic electromagnetic wave with a direction opposite to that generated by the adjacent column of radiating arrays. In other words, the parasitic electromagnetic wave generated by the parasitic radiator can cancel out the parasitic electromagnetic wave generated by the adjacent column of radiating arrays, thereby reducing the horizontal plane width of the multi-array antenna and thus enabling the radiation pattern of the multi-array antenna to meet the requirements of the wireless communication system. Attached Figure Description

[0024] Figure 1(a) is a schematic diagram of an antenna provided in an embodiment of the present invention;

[0025] Figure 1(b) is a schematic diagram of an antenna provided in an embodiment of the present invention;

[0026] Figure 2(a) is a schematic diagram of an antenna provided in an embodiment of the present invention;

[0027] Figure 2(b) is a schematic diagram of an antenna provided in an embodiment of the present invention;

[0028] Figure 3(a) is a schematic diagram of an antenna provided in an embodiment of the present invention;

[0029] Figure 3(b) is a schematic diagram of an antenna provided in an embodiment of the present invention;

[0030] Figure 4 This is a schematic diagram of an antenna provided in an embodiment of the present invention;

[0031] Figure 5(a) is a schematic diagram of an antenna provided in an embodiment of the present invention;

[0032] Figure 5(b) is a schematic diagram of an antenna provided in an embodiment of the present invention;

[0033] Figure 5(c) is a schematic diagram of an antenna provided in an embodiment of the present invention;

[0034] Figure 6(a) is a schematic diagram of an antenna provided in an embodiment of the present invention;

[0035] Figure 6(b) is a schematic diagram of an antenna provided in an embodiment of the present invention;

[0036] Figure 6(c) is a schematic diagram of an antenna provided in an embodiment of the present invention;

[0037] Figure 6(d) is a schematic diagram of an antenna provided in an embodiment of the present invention;

[0038] Figure 7(a) is a schematic diagram of an antenna provided in an embodiment of the present invention;

[0039] Figure 7(b) is a schematic diagram of an antenna provided in an embodiment of the present invention;

[0040] Figure 8(a) is a schematic diagram of an antenna provided in an embodiment of the present invention;

[0041] Figure 8(b) is a schematic diagram of an antenna provided in an embodiment of the present invention;

[0042] Figure 9(a) is a schematic diagram of an antenna provided in an embodiment of the present invention;

[0043] Figure 9(b) is a schematic diagram of an antenna provided in an embodiment of the present invention.

[0044] Legend

[0045] 1. Reflecting device 2. Type I radiation array

[0046] 3. Parasitic radiator 31. Lateral parasitic radiator

[0047] 32 Longitudinal parasitic radiator 21 Radiation element of type I radiation array

[0048] 4. Type II Radiation Array 41. Radiation Element of Type II Radiation Array Detailed Implementation

[0049] This invention provides an antenna, as shown in Figure 1(a). The antenna includes a reflecting device 1, at least two radiating arrays 2 operating within a first preset frequency band, and multiple parasitic radiators 3. The first preset frequency band can be a low-frequency preset band, such as 690MHz-960MHz, or a high-frequency preset band, such as 1710MHz-2690MHz. Furthermore, the operating frequency bands corresponding to each of the at least two radiating arrays can be different or the same (that is, the operating frequency band corresponding to each radiating array can be a sub-band within the first preset frequency band), and their corresponding operating bandwidths can be the same or different. For example, the antenna includes radiating array a and radiating array b. The operating frequency of radiating array a can be 850MHz-890MHz (corresponding to an operating bandwidth of 40MHz), and the operating frequency of radiating array b can be 900MHz-940MHz (corresponding to an operating bandwidth of 40MHz).

[0050] The antenna includes at least two rows of radiating arrays 2, each of which may include multiple radiating elements 21. Each row of radiating arrays 2 contains the same number of radiating elements. For each pair of adjacent radiating arrays (both operating in a first preset frequency band), the radiating elements corresponding to the two rows of radiating arrays can be called a radiating element pair in the width direction of the reflecting device 1. The number of radiating element pairs in each pair of adjacent radiating arrays is the same as the number of radiating elements in each row of radiating arrays. For example, if radiating array a and radiating array b are adjacent radiating arrays operating in the same first preset frequency band, then the first radiating element of radiating array a and the first radiating element of radiating array b can be called a radiating element pair, the second radiating element of radiating array a and the second radiating element of radiating array b can be called a radiating element pair, and so on. Each column of radiation arrays can be electrically disposed on the reflector 1 along the length direction (i.e., longitudinal or column direction) of the reflector 1, which is a metal reflector. At least two columns of radiation arrays 2 can be directly electrically connected to the reflector 1 (e.g., directly connected to the reflector 1 by rivets or screws), or electrically coupled to the reflector 1 (e.g., electrically connected to the reflector 1 by a printed circuit board (PCB)).

[0051] Additionally, each radiating element 21 may include at least one grounding device, at least one set of antenna baluns, and radiating arms (when the radiating element is a single-polarized dipole radiating element, each radiating element includes at least two radiating arms; when the radiating element is a dual-polarized dipole radiating element, each radiating element includes at least four radiating arms). At least one grounding device is directly or electrically coupled to the reflecting device 1. The height of the at least one set of antenna baluns can be a value within a preset range containing 0.25 times the wavelength, where the wavelength is the wavelength corresponding to the center frequency of the radiating element's operating frequency band (which may be called the center wavelength). For example, if the radiating element's operating frequency band is 850MHz-890MHz, then the center frequency is (850+890) / 2, and the wavelength is the wavelength corresponding to that center frequency. One end of each set of antenna baluns can be connected to the grounding device, and the other end of the antenna balun can be connected to the radiating arm. The length of each radiating arm can also be a value within a preset range containing 0.25 times the wavelength. In addition, the distance between adjacent radiating elements in each column of radiating array 2 is approximately in the range of 0.5 times to 1.2 times the wavelength, the distance between adjacent radiating elements in each column of radiating array 2 is approximately equal, and the distance between two radiating elements in a pair of adjacent columns of radiating arrays is approximately in the range of 0.4 times to 0.8 times the wavelength.

[0052] The antenna includes multiple parasitic radiators 3, which can be metal strips, or parasitic strips or isolation strips. Multiple parasitic radiators can be arranged between two adjacent columns of radiating arrays.

[0053] Optionally, the length direction of the reflecting device 1 can be defined as longitudinal or column-oriented, and the width direction of the reflecting device 1 can be defined as transverse. Thus, the plurality of parasitic radiators 3 can include a plurality of transverse parasitic radiators 31 arranged along the width direction of the reflecting device 1; that is, each of the plurality of transverse parasitic radiators 31 can be arranged along the width direction of the reflecting device 1. The plurality of transverse parasitic radiators 31 can be respectively arranged on both sides of each pair of radiating elements contained in two adjacent columns of the radiating array, as shown in Figure 1(b). Specifically, lateral parasitic radiators 31 can be provided on both sides of each pair of radiating elements contained in two adjacent columns of radiating arrays; or, lateral parasitic radiators 31 can be provided on both sides of other pairs of radiating elements in two adjacent columns of radiating arrays except for those at the edge; or, lateral parasitic radiators 31 can be provided on both sides of each pair of radiating elements in two adjacent columns of radiating arrays whose corresponding input power is greater than a preset power threshold; or, lateral parasitic radiators 31 can be provided on both sides of a preset number of pairs of radiating elements in two adjacent columns of radiating arrays whose maximum input power is a preset number, wherein the input power is the largest at the middle position, and the input power decreases sequentially from the middle position to the sides of the radiating elements. In this way, lateral parasitic radiators 31 are set on both sides of each radiating element in two adjacent columns of radiating arrays. When a column of radiating arrays is working, the lateral parasitic radiators 31 can generate parasitic electromagnetic waves with directions opposite to those generated by the adjacent columns of radiating arrays. In other words, the parasitic electromagnetic waves generated by the lateral parasitic radiators 31 can cancel out the parasitic electromagnetic waves generated by the adjacent columns of radiating arrays, thereby reducing the horizontal plane width of the multi-array antenna and thus enabling the radiation pattern of the multi-array antenna to meet the requirements of the wireless communication system.

[0054] Optionally, to better reduce the horizontal beamwidth of the multi-array antenna, when setting multiple lateral parasitic radiators 31, the distance from the midpoint of the vertical projection of each lateral parasitic radiator 31 onto the bottom surface of the reflector 1 to the line connecting the corresponding radiating element pair of each lateral parasitic radiator 31 can be a preset distance value. The vertical projection or axis of the vertical projection of each lateral parasitic radiator 31 onto the bottom surface of the reflector 1 is parallel to the line connecting the corresponding radiating element pair of each lateral parasitic radiator 31. The radiating element pair corresponding to each lateral parasitic radiator 31 can be the radiating element pairs on both sides of that lateral parasitic radiator 31. That is, each lateral parasitic radiator 31 can be positioned in the middle of two corresponding radiating element pairs, and the plane containing the lateral parasitic radiator 31 is parallel to the plane containing each corresponding radiating element pair. In this embodiment of the invention, the line connecting the radiating element pairs refers to the line connecting the two radiating elements contained in the radiating element pair on the bottom surface of the reflector.

[0055] For example, if the line connecting the pairs of radiating elements in two adjacent columns of the radiating array is parallel to the wide side of the reflector 1, then the placement of the lateral parasitic radiator 31 can be as shown in Figure 2(a); if the line connecting the pairs of radiating elements in two adjacent columns of the radiating array forms a certain angle with the wide side of the reflector 1, then the placement of the lateral parasitic radiator 31 can be as shown in Figure 2(b). Figures 2(a) and 2(b) are top views of the antenna, i.e., vertical projections of the antenna onto the bottom surface of the reflector.

[0056] Optionally, the midpoint of the vertical projection of each of the multiple transverse parasitic radiators 31 onto the bottom surface of the reflector 1 can be located on the line connecting the midpoints of the corresponding pair of radiating elements (wherein the midpoint can be the midpoint of the line connecting the radiating elements contained in the pair). That is, for each transverse parasitic radiator 31, in some cases, when setting it, it can be made to coincide with the geometric center of the two pairs of radiating elements corresponding to it, i.e., the midpoint of its vertical projection onto the bottom surface of the reflector 1 can be as close as possible to the distance between the axes of the two adjacent columns of radiating arrays. For example, if the line connecting the pairs of radiating elements contained in the two adjacent columns of radiating arrays is parallel to the wide side of the reflector, the transverse parasitic radiator can be placed as shown in Figure 3(a); if the line connecting the pairs of radiating elements contained in the two adjacent columns of radiating arrays forms a certain angle with the wide side of the reflector, the transverse parasitic radiator can be placed as shown in Figure 3(b). Figures 3(a) and 3(b) are top views of the antenna, i.e., vertical projections of the antenna onto the bottom surface of the reflector. Furthermore, when multiple lateral parasitic radiators 31 are provided, the distance from the midpoint of the vertical projection of each lateral parasitic radiator 31 onto the bottom surface of the reflector 1 to the line connecting the corresponding radiating element pair of each lateral parasitic radiator 31 is a preset distance value. Additionally, on the line connecting the midpoints of the corresponding radiating element pairs of each lateral parasitic radiator 31, the vertical projection or axis of the vertical projection of each lateral parasitic radiator 31 onto the bottom surface of the reflector 1 is parallel to the line connecting the corresponding radiating element pairs of each lateral parasitic radiator 31.

[0057] Optionally, when setting each radiation array 2, the geometric center of the radiation element in each pair of radiation elements in two adjacent columns of radiation array can be located on the same straight line parallel to the wide side of the reflector 1, as shown in the arrangement of each pair of radiation elements in Figure 1(a).

[0058] Optionally, when setting each radiation array 2, the geometric centers of the multiple radiation units included in each of the at least two radiation arrays can be located on the same straight line parallel to the long side of the reflector 1, that is, the longitudinal axis of each radiation array can be parallel to the long side of the reflector 1, as shown in the arrangement of each radiation array in Figure 1(a).

[0059] Optionally, when setting multiple lateral parasitic radiators 31, their height and effective length can also meet certain requirements. Specifically, when setting each lateral parasitic radiator 31, the height of the apex of each lateral parasitic radiator 31 from the bottom surface of the reflecting device 1 can be set to a value within a preset range including 0.25 times the wavelength. This wavelength is the average wavelength of the wavelengths of the two adjacent columns of the radiating array corresponding to each lateral parasitic radiator 31 (this wavelength can be called the average wavelength), where the wavelength of the radiating array is the wavelength corresponding to the center frequency of the operating frequency band of the radiating array. For example, if the antenna includes radiating array a and radiating array b, with the center frequency of radiating array a being A and the center frequency of radiating array b being B, then this wavelength is the average of the wavelengths corresponding to A and B. Furthermore, the difference between the endpoint value of the preset range and 0.25 times the wavelength is less than a preset threshold. For example, if 0.25 times the wavelength is p, then the preset range can be from pq to p+q, where q is a smaller value, which can be the aforementioned preset threshold.

[0060] When setting each transverse parasitic radiator 31, the effective length of each transverse parasitic radiator 31 can be set to a value within the range of 0.8 to 2.5 times the wavelength. The effective length of each transverse parasitic radiator 31 can be approximated within this range, allowing for some deviation. The definition of the effective length can be the same as that of the radiating element, as follows: Place the antenna in a Cartesian coordinate system, with the physical geometric center of the antenna at the origin. Place the reflector along the Z-axis in its length direction and along the X-axis in its width direction. Project the transverse parasitic radiators 31 parallel to the width of the reflector onto the XY, XZ, and YZ planes respectively. Select the longest straight line projection among these planes as the effective length of the transverse parasitic radiator 31. That is, the view where the projection of the transverse parasitic radiator 31 is a straight line can be determined from the top view of the antenna, the side view along the length direction of the reflector, or the side view along the width direction of the reflector. Therefore, the length corresponding to the longest straight line can be taken as the effective length of the transverse parasitic radiator 31.

[0061] Optional, such as Figure 4 As shown, the multiple parasitic radiators may also include multiple longitudinal parasitic radiators 32. When setting the longitudinal parasitic radiators 32, each longitudinal parasitic radiator 32 can be set along the length direction of the reflector 1 between the two radiation units contained in the radiation unit pair corresponding to each longitudinal parasitic radiator 32.

[0062] Optionally, to better reduce the horizontal beamwidth of the multi-array antenna, when setting multiple longitudinal parasitic radiators 32, the midpoint of the vertical projection of each longitudinal parasitic radiator 32 onto the bottom surface of the reflector 1 can coincide with the midpoint of the line connecting the two radiating elements in the corresponding radiating element pair of each longitudinal parasitic radiator 32. Furthermore, the axis of the vertical projection or vertical projection of each longitudinal parasitic radiator 32 onto the bottom surface of the reflector 1 is perpendicular to the line connecting the corresponding radiating element pair of each longitudinal parasitic radiator 32. The radiating element pair corresponding to each longitudinal parasitic radiator 32 can be a pair of radiating elements composed of radiating elements on both sides of the longitudinal parasitic radiator 32. In other words, each longitudinal parasitic radiator 32 can be positioned in the middle of the two radiating elements in the corresponding radiating element pair, and perpendicular to the line connecting the corresponding radiating element pair. For example, if the line connecting the pairs of radiating elements in two adjacent columns of radiating arrays is parallel to the wide side of the reflector, the longitudinal parasitic radiator 32 can be positioned as shown in Figure 5(a); if the line connecting the pairs of radiating elements in two adjacent columns of radiating arrays forms a certain angle with the wide side of the reflector, the longitudinal parasitic radiator 32 can be positioned as shown in Figure 5(b). Figures 5(a) and 5(b) are top views of the antenna, i.e., vertical projections of the antenna onto the bottom surface of the reflector. The side view corresponding to Figure 5(a) is shown in Figure 5(c).

[0063] Optionally, when setting multiple longitudinal parasitic radiators 32, their height and effective length can also meet certain requirements. Specifically, when setting each longitudinal parasitic radiator 32, the height of the apex of each longitudinal parasitic radiator 32 from the bottom surface of the reflecting device 1 can be set to a value within a preset range including 0.25 times the wavelength, where the wavelength is the average wavelength of the wavelengths of the two adjacent columns of the radiation array corresponding to each longitudinal parasitic radiator 32 (this wavelength can be called the average wavelength). In addition, the difference between the endpoint value of the preset range and 0.25 times the wavelength is less than a preset threshold. For example, if 0.25 times the wavelength is p, then the preset range can be from pq to p+q, where q is a smaller value, which can be the aforementioned preset threshold.

[0064] When setting each longitudinal parasitic radiator 32, the effective length of each longitudinal parasitic radiator 32 can be set to a value within the range of 0.8 to 2.5 times the wavelength. The effective length of each longitudinal parasitic radiator 32 can be approximated to a value within the range of 0.8 to 2.5 times the wavelength, allowing for a certain degree of deviation. The definition of the effective length of the longitudinal parasitic radiator 32 is the same as the definition of the effective length of the transverse parasitic radiator.

[0065] Furthermore, the lateral parasitic radiator 31 and the longitudinal parasitic radiator 32 can be fixed to the bottom surface of the reflector 1 by a support column, which can be a plastic support column. The shapes of the lateral parasitic radiator 31 and the longitudinal parasitic radiator 32 can vary. Several feasible shapes for the lateral parasitic radiator 31 or the longitudinal parasitic radiator 32 are provided in this embodiment, as follows: Figure 6(a) , 6(b) As shown in 6(c) and 6(d), the transverse parasitic radiator 31 or the longitudinal parasitic radiator 32 can be an axisymmetric parasitic radiator.

[0066] Optionally, each radiating element in each of the at least two columns of radiating arrays included in the antenna can be a dual-polarized dipole radiating element, wherein the dual-polarized dipoles of each radiating element can be placed at a positive / negative 45-degree angle, and each dual-polarized dipole radiating element can be a dipole interlocking element, a dipole bowl-shaped element, or a dipole patch element, etc. Each radiating element can also be a single-polarized dipole radiating element.

[0067] In this scheme, by setting up lateral and longitudinal parasitic radiators, the horizontal plane bandwidth of the multi-array antenna can be reduced. The horizontal plane radiation pattern of the antenna without lateral and longitudinal parasitic radiators is shown in Figure 7(a). The horizontal plane radiation pattern of the antenna after adding the lateral and longitudinal parasitic radiators in this scheme is shown in Figure 7(b). In Figures 7(a) and 7(b), the horizontal axis represents the angle value, and the vertical axis represents the decibel value. Comparing Figures 7(a) and 7(b), it can be found that the 3 dB bandwidth and 10 dB bandwidth shown in Figure 7(b) are smaller than those shown in Figure 7(a).

[0068] Optionally, the at least two columns of radiating arrays operating within the first preset frequency band can be referred to as first-type radiating arrays, and the antenna may further include at least one column of radiating array 4 operating in the second preset frequency band (which can be referred to as a second-type radiating array). Wherein, when the first preset frequency band is a low-frequency preset frequency band, the second preset frequency band can be a high-frequency preset frequency band; when the first preset frequency band is a high-frequency preset frequency band, the second preset frequency band can be a low-frequency preset frequency band. Each column of radiating array 4 in the second-type radiating array includes multiple radiating elements 41. Each column of radiating array is electrically disposed on the reflector 1 along the length direction of the reflector 1.

[0069] Optionally, the geometric centers of the radiating elements 41 included in each pair of radiating elements in the second type of radiating array 4 can be located on the same straight line parallel to the wide side of the reflecting device 1, and the geometric centers of the multiple radiating elements 41 included in each column of the radiating array 4 can be located on the same straight line parallel to the long side of the reflecting device 1. For example, when the first preset frequency band is a low-frequency preset frequency band and the second preset frequency band is a high-frequency preset frequency band, the top view of the antenna can be shown in Figure 8(a), and the side view can be shown in Figure 8(b).

[0070] Optionally, the second type of radiating array 4 can also be coaxial with the first type of radiating array 2, that is, the straight line containing the geometric center of the radiating element of each column of radiating array 2 in the first type of radiating array coincides with the straight line containing the geometric center of the radiating element of each column of radiating array 4 in the second type of radiating array. This allows for a smaller antenna size. Optionally, the geometric centers of the multiple radiating elements 41 included in each column of radiating array 4 in the second type of radiating array can be located on the same straight line parallel to the long side of the reflector 1, and adjacent columns of radiating arrays in the second type of radiating array 4 are staggered in the width direction of the reflector 1. The misalignment distance between each pair of radiating elements in each pair of adjacent columns of radiating arrays in the second type of radiating array 4 is approximately 0.5 times the distance between adjacent radiating elements in each column of radiating array 4, where the misalignment distance between each pair of radiating elements is the offset distance between the two radiating elements in the length direction of the reflector. In other words, when the second type of radiating array 4 has four columns of radiating arrays, the radiating elements 41 corresponding to each column of radiating array 4 in the width direction of the reflector 1 are arranged in an S-shape. For example, when the first preset frequency band is a low-frequency preset frequency band and the second preset frequency band is a high-frequency preset frequency band, the top view of the antenna can be shown in Figure 9(a) and the side view can be shown in Figure 9(b).

[0071] In this embodiment of the invention, lateral parasitic radiators are arranged on both sides of each pair of radiating elements contained in two adjacent columns of radiating arrays, and / or longitudinal parasitic radiators are arranged between the two radiating elements contained in each pair of radiating elements. When a column of radiating arrays is working, the lateral parasitic radiators and / or the longitudinal parasitic radiators can generate parasitic electromagnetic waves with directions opposite to those generated by the adjacent columns of radiating arrays. In other words, the parasitic electromagnetic waves generated by the lateral parasitic radiators and / or the longitudinal parasitic radiators can cancel out the parasitic electromagnetic waves generated by the adjacent columns of radiating arrays, thereby reducing the horizontal plane bandwidth of the multi-array antenna and thus enabling the radiation pattern indicators of the multi-array antenna to meet the requirements of the wireless communication system.

[0072] Those skilled in the art will understand that all or part of the steps of the above embodiments can be implemented by hardware or by a program instructing related hardware. The program can be stored in a computer-readable storage medium, such as a read-only memory, a disk, or an optical disk.

[0073] The above description is merely one embodiment of the present invention and is not intended to limit this application. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of the present invention.

Claims

1. An antenna, characterized in that, The antenna includes a reflector, at least two rows of radiating arrays operating within a first preset frequency band, and multiple parasitic radiators. Each of the at least two rows of radiating arrays includes multiple radiating elements, wherein: Each of the at least two radiation arrays is electrically disposed on the reflector along the length of the reflector, and the plurality of parasitic radiators are disposed between two adjacent radiation arrays in the at least two radiation arrays; The parasitic radiator is axially symmetric in shape, and the plurality of parasitic radiators include a plurality of transverse parasitic radiators; Each of the plurality of transverse parasitic radiators is arranged along the width direction of the reflective device; the plurality of transverse parasitic radiators are respectively arranged on both sides of each pair of radiating elements contained in two adjacent columns of radiating arrays, wherein the radiating elements included in the pair of radiating elements are two corresponding radiating elements in two adjacent columns of radiating arrays.

2. The antenna according to claim 1, characterized in that, The distance between the midpoint of the vertical projection of each lateral parasitic radiator onto the bottom surface of the reflector and the line connecting the radiating element in the corresponding radiating element pair of each lateral parasitic radiator is a preset distance value. The vertical projection of each lateral parasitic radiator onto the bottom surface of the reflector is parallel to the line connecting the radiating elements in the corresponding radiating element pair of each lateral parasitic radiator.

3. The antenna according to claim 1 or 2, characterized in that, The midpoint of the vertical projection of each transverse parasitic radiator onto the bottom surface of the reflector is on the line connecting the midpoints of the corresponding pair of radiating elements of each transverse parasitic radiator.

4. The antenna according to any one of claims 1-3, characterized in that, The height of the apex of each transverse parasitic radiator from the bottom surface of the reflector is a value within a preset range containing 0.25 times the wavelength, where the wavelength is the average wavelength of the wavelengths of the two adjacent columns of the radiation array corresponding to each transverse parasitic radiator.

5. The antenna according to any one of claims 1-4, characterized in that, The effective length of each transverse parasitic radiator is a value ranging from 0.8 to 2.5 times the wavelength, where the wavelength is the average wavelength of the wavelengths of the two adjacent columns of the radiation array corresponding to each transverse parasitic radiator.

6. The antenna according to any one of claims 1-5, characterized in that, The plurality of parasitic radiators includes a plurality of longitudinal parasitic radiators; Each of the plurality of longitudinal parasitic radiators is arranged along the length of the reflector; the plurality of longitudinal parasitic radiators are respectively arranged between two radiation elements contained in each pair of radiation elements in two adjacent columns of radiation arrays.

7. The antenna according to claim 6, characterized in that, The midpoint of the vertical projection of each longitudinal parasitic radiator onto the bottom surface of the reflector coincides with the midpoint of the line connecting the corresponding pair of radiating elements of each longitudinal parasitic radiator, and the vertical projection of each longitudinal parasitic radiator onto the bottom surface of the reflector is perpendicular to the line connecting the corresponding pair of radiating elements of each longitudinal parasitic radiator.

8. The antenna according to claim 6 or 7, characterized in that, The height of the apex of each longitudinal parasitic radiator from the bottom surface of the reflector is a value within a preset range containing 0.25 times the wavelength, wherein the wavelength is the average wavelength of the wavelengths of the two adjacent columns of radiation arrays corresponding to each longitudinal parasitic radiator.

9. The antenna according to any one of claims 6-8, characterized in that, The effective length of each longitudinal parasitic radiator is a value ranging from 0.8 to 2.5 times the wavelength, where the wavelength is the average wavelength of the wavelengths of the two adjacent columns of the radiation array corresponding to each longitudinal parasitic radiator.

10. The antenna according to any one of claims 1-9, characterized in that, Each of the at least two columns of radiation arrays contains a dual-polarized dipole radiation element; or, Each of the at least two radiation arrays contains a single-polarized dipole radiation element.

11. The antenna according to any one of claims 1-10, characterized in that, The first preset frequency band is 690MHz-960MHz; or, the first preset frequency band is 1710MHz-2690MHz.

12. The antenna according to any one of claims 1-11, characterized in that, Each column of radiation array is electrically disposed on the reflector along the length direction of the reflector, comprising: Each column of radiation array is disposed on the reflector along the length of the reflector by means of electrical connection or electrical coupling connection with the reflector.

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