Base station antenna assembly and printed circuit board used in base station antenna

Abstract

The invention relates to a base station antenna assembly. The base station antenna assembly comprises a reflector; a first radiator; a second radiator; the feeding plate comprises a dielectric substrate and a conductor plane which is formed on the rear surface of the dielectric substrate and is capacitively coupled with the grounding plane; the first feed path comprises a first section of feed line extending from the rear of the feed panel to the front of the feed panel and a second section of feed line formed on the front surface of the dielectric substrate; the second feed path comprises a first section of feed line extending from the rear of the feed panel to the front of the feed panel and a second section of feed line formed on the front surface of the dielectric substrate; and a slot resonator positioned between a portion of a first segment of the feed line of the first feed path extending to a front of the feed panel and a portion of a first segment of the feed line of the second feed path extending to a front of the feed panel, the slot resonator configured to resonate at a first frequency, wherein the first frequency is located within an operating frequency band of the first radiator and the second radiator.

Description

Technical Field

[0001] The present disclosure relates to wireless communication systems, and more particularly, to a base station antenna assembly and a printed circuit board used in the base station antenna. Background Art

[0002] Radio base stations are well known in the art and typically include a baseband unit, a radio unit, and a base station antenna, among other components. The base station antenna is configured to provide two-way radio frequency ("RF") communications with fixed and mobile subscribers ("users") located throughout a cell. The base station antenna is typically mounted on a tower or raised structure such as a pole, rooftop, water tower, etc., to which separate baseband units and radio units are connected.

[0003] Figure 1 9 is a schematic diagram of the structure of a base station 90. The base station 90 includes a base station antenna 95 that can be mounted on a protruding structure 94. The base station 90 also includes base station equipment, such as a baseband unit 91 and a radio unit 92. To simplify the drawings, Figure 1 A single baseband unit 91 and a single radio unit 92 are shown in the figure. However, it should be understood that more than one baseband unit 91 and / or radio unit 92 may be provided. In addition, although the radio unit 92 is shown as being co-located with the baseband unit 91 at the bottom of the raised structure 94, it should be understood that in other cases, the radio unit 92 may be a remote radio head (RRH) mounted on the raised structure 94 adjacent to the base station antenna 95. The baseband unit 91 may receive data from another source, such as a backhaul network (not shown), and may process the data and provide a data stream to the radio unit 92. The radio unit 92 may generate RF signals including data encoded therein and may amplify and transmit these RF signals to the base station antenna 95 via a radio frequency cable 93 (e.g., a coaxial transmission line). It should also be understood that Figure 1 The base station 90 may typically include various other devices (not shown), such as a power supply, a backup battery, a power bus, an antenna interface signal group (AISG) controller, etc.

[0004] Typically, a base station antenna includes one or more phased arrays of radiating elements, wherein the radiating elements are arranged in one or more columns when the antenna is mounted for use. In order to transmit RF signals to and receive RF signals from a defined coverage area, the antenna beam of the base station antenna 95 is typically tilted at a specific downward angle relative to the horizontal plane (referred to as the "down tilt"). In some cases, the base station antenna 95 may be designed so that the "electronic down tilt" of the base station antenna 95 can be adjusted from a remote location. With a base station antenna 95 that includes such an electronic tilt capability, the physical orientation of the base station antenna 95 is fixed, but the effective angle of the antenna beam can still be electronically adjusted, for example, by controlling phase shifters that adjust the phase of the signal provided to each radiating element of the base station antenna 95. Phase shifters and other related circuits are typically built into the base station antenna 95 and can be controlled from a remote location. Typically, AISG control signals are used to control the phase shifters.

[0005] Many different types of phase shifters are known in the art, including rotary wiperarm phase shifters, trombone style phase shifters, sliding dielectric phase shifters, and sliding metal phase shifters. Phase shifters are usually constructed together with power dividers as part of a feed network (or feed assembly) for feeding a phased array. The power divider divides the RF signal input to the feed network into a plurality of sub-components, and the phase shifter applies a variable respective phase shift to each sub-component so that each sub-component is fed to one or more radiators. Summary of the invention

[0006] One of the objects of the present disclosure is to provide a base station antenna assembly and a printed circuit board used in the base station antenna.

[0007] According to a first aspect of the present disclosure, a base station antenna assembly is provided, comprising: a reflector configured to provide a ground plane; a first radiator positioned in front of the reflector, the first radiator being configured to send and receive electromagnetic radiation within a first frequency band; a second radiator positioned in front of the reflector, the second radiator being configured to send and receive electromagnetic radiation within the first frequency band; a feed board positioned between the reflector and the first radiator and between the reflector and the second radiator, the feed board comprising a dielectric substrate and a conductor plane formed on a rear surface of the dielectric substrate and capacitively coupled to the ground plane; a first feeding path configured to feed a first radio frequency signal to the first radiator, the first feeding path The dielectric substrate includes a first feeding path including a first feeding line extending from the rear of the feeding board to the front of the feeding board and a second feeding line formed on the front surface of the dielectric substrate; a second feeding path configured to feed a second RF signal to a second radiator, the second feeding path including a first feeding line extending from the rear of the feeding board to the front of the feeding board and a second feeding line formed on the front surface of the dielectric substrate; and a slot resonator positioned between a portion of the first feeding line of the first feeding path extending to the front of the feeding board and a portion of the first feeding line of the second feeding path extending to the front of the feeding board, the slot resonator being configured to resonate at a first frequency, wherein the first frequency is within a first frequency band.

[0008] According to a second aspect of the present disclosure, a base station antenna assembly is provided, comprising: a grounded reflector; a grounded first shell, positioned behind the reflector; a grounded second shell, positioned behind the reflector; a first conductive line, comprising a first portion positioned inside the first shell and a second portion extending outside the first shell, the first portion of the first conductive line being configured to form a first stripline transmission line with the first shell; a second conductive line, comprising a first portion positioned inside the second shell and a second portion extending outside the second shell, the first portion of the second conductive line being configured to form a second stripline transmission line with the second shell; and a feed board, positioned in front of the reflector, the feed board comprising a dielectric substrate and a grounded conductor plane formed on a rear surface of the dielectric substrate, wherein the second portion of the first conductive line passes through the reflector and the feed board and extends in front of the feed board, the second portion of the second conductive line passes through the reflector and the feed board and extends in front of the feed board, and a gap is formed in the conductor plane between the second portion of the first conductive line and the second portion of the second conductive line.

[0009] According to a third aspect of the present disclosure, a base station antenna assembly is provided, comprising: a reflector configured to provide a ground plane; a first radiator positioned in front of the reflector, the first radiator being configured to send and receive electromagnetic radiation within a first frequency band; a second radiator positioned in front of the reflector, the second radiator being configured to send and receive electromagnetic radiation within a second frequency band, the second frequency band overlapping the first frequency band within a third frequency band; a grounded first shell positioned behind the reflector; a grounded second shell positioned behind the reflector; a first conductive line for feeding the first radiator, comprising a first portion positioned inside the first shell and a first portion extending outside the first shell and passing through the reflector; The first conductive line is configured to form a first stripline transmission line with the first shell; a second conductive line for feeding the second radiator comprises a first portion positioned inside the second shell and a second portion extending outside the second shell and extending through the reflector to the front of the reflector, the first portion of the second conductive line is configured to form a second stripline transmission line with the second shell; and a decoupling unit is positioned in front of the reflector and located between the second portion of the first conductive line and the second portion of the second conductive line, the decoupling unit being configured to decouple the second portion of the first conductive line and the second portion of the second conductive line at least within a third frequency band.

[0010] According to a fourth aspect of the present disclosure, there is provided a printed circuit board for use in a base station antenna, wherein the printed circuit board is positioned in front of a reflector of the base station antenna and behind a dual-polarization radiating element of the base station antenna, the printed circuit board comprising: a dielectric substrate; a first conductive trace and a second conductive trace formed on a front surface of the dielectric substrate, the first conductive trace being used to feed a first polarized radiator of the dual-polarization radiating element, and the second conductive trace being used to feed a second polarized radiator of the dual-polarization radiating element; and a conductor plane formed on a rear surface of the dielectric substrate, wherein a gap is formed in the conductor plane, and the gap extends between the first conductive trace and the second conductive trace.

[0011] Other features and advantages of the present disclosure will become apparent from the following detailed description of exemplary embodiments of the present disclosure with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] The accompanying drawings, which constitute a part of the specification, illustrate embodiments of the present disclosure and, together with the description, serve to explain the principles of the present disclosure.

[0013] Figure 1 It is a structural diagram of a base station.

[0014] Figure 2A and 2BSchematic diagram of a radiator and a radiating element of the present disclosure.

[0015] Figure 3 is a bottom view of a base station antenna assembly according to an embodiment of the present disclosure.

[0016] Figure 4 yes Figure 3 A side view of a portion of the first feed line section of a base station antenna assembly.

[0017] Figure 5A and Figure 5B yes Figure 3 An enlarged view of the housing element of the base station antenna assembly.

[0018] Figure 6 is a perspective view of a portion of a base station antenna assembly according to an embodiment of the present disclosure, showing an opening on a reflector and a structure on a rear surface of a feed board.

[0019] Figure 7 yes Figure 6 A perspective view of a portion of a housing element of a base station antenna assembly.

[0020] Figure 8 It is shown Figure 6 A perspective view of a base station antenna assembly in which a second portion of a first feed line extends in front of a reflector.

[0021] Fig. 9 yes Figure 6 A plan view of the rear surface of a feed board in a base station antenna assembly.

[0022] Fig.10 is a schematic diagram of a slot in a feed plate in a base station antenna assembly according to an embodiment of the present disclosure.

[0023] Fig.11 is a schematic diagram of a slot in a feed plate in a base station antenna assembly according to an embodiment of the present disclosure.

[0024] Fig.12 Shows Figure 6 The isolation curve between the two polarizations when the base station antenna assembly is used to feed the crossed dipole radiating element is Fig. 9 Isolation curve between the two polarizations when a base station antenna assembly is used to feed a crossed dipole radiating element.

[0025] Note that in the embodiments described below, sometimes the same reference numerals are used in common between different drawings to represent the same parts or parts with the same functions, and their repeated descriptions are omitted. In some cases, similar numbers and letters are used to represent similar items, so once an item is defined in one drawing, it does not need to be further discussed in subsequent drawings.

[0026] For ease of understanding, the position, size, range, etc. of each structure shown in the drawings and the like may not represent the actual position, size, range, etc. Therefore, the present disclosure is not limited to the position, size, range, etc. disclosed in the drawings and the like. DETAILED DESCRIPTION

[0027] The present disclosure will be described below with reference to the accompanying drawings, wherein the accompanying drawings illustrate several embodiments of the present disclosure. However, it should be understood that the present disclosure can be presented in a variety of different ways and is not limited to the embodiments described below; in fact, the embodiments described below are intended to make the disclosure of the present disclosure more complete and fully illustrate the scope of protection of the present disclosure to those skilled in the art. It should also be understood that the embodiments disclosed herein can be combined in various ways to provide more additional embodiments.

[0028] It should be understood that the terms used herein are only used to describe specific embodiments and are not intended to limit the scope of the present disclosure. All terms (including technical terms and scientific terms) used herein have meanings commonly understood by those skilled in the art unless otherwise defined. For the sake of simplicity and / or clarity, well-known functions or structures may not be described in detail.

[0029] In this article, when an element is said to be "on", "attached" to, "connected" to, "coupled" to, or "contacting" another element, the element may be directly on, attached to, connected to, coupled to, or contacting another element, or there may be an intermediate element. In contrast, when an element is said to be "directly" "on", "directly attached" to, "directly connected" to, "directly coupled" to, or "directly contacting" another element, there may be no intermediate element. In this article, a feature is arranged to be "adjacent" to another feature, and may refer to a feature having a portion overlapping an adjacent feature or a portion located above or below an adjacent feature.

[0030] In this document, reference may be made to elements or nodes or features being "coupled" together. Unless expressly stated otherwise, "coupled" means that one element / node / feature can be mechanically, electrically, logically or otherwise connected to another element / node / feature in a direct or indirect manner to allow interaction, even though the two features may not be directly connected. That is, "coupled" is intended to include direct and indirect connections of elements or other features, including connections using one or more intermediate elements.

[0031] As used herein, spatial relational terms such as "upper," "lower," "left," "right," "front," "rear," "higher," "lower," etc. may describe the relationship of one feature to another feature in the accompanying drawings. It should be understood that the spatial relational terms encompass different orientations of the device in use or operation in addition to the orientation shown in the accompanying drawings. For example, features previously described as being "below" other features may now be described as being "above" the other features when the device in the accompanying drawings is turned over. The device may also be otherwise oriented (rotated 90 degrees or in other orientations), and the relative spatial relationships will be interpreted accordingly.

[0032] Herein, the term "A or B" includes "A and B" and "A or B" rather than exclusively including only "A" or only "B", unless specifically stated otherwise.

[0033] In this document, the word "exemplary" means "used as an example, instance or illustration" rather than as a "model" to be exactly copied. Any implementation described as an example herein is not necessarily to be construed as preferred or advantageous over other implementations. Moreover, the present disclosure is not limited by any expressed or implied theory given in the above technical field, background technology, summary of the invention or detailed description.

[0034] As used herein, the term "substantially" is intended to include any minor variations due to design or manufacturing imperfections, device or component tolerances, environmental influences, and / or other factors. The term "substantially" also allows for deviations from a perfect or ideal situation due to parasitic effects, noise, and other practical considerations that may exist in actual implementations.

[0035] In addition, the terms "first", "second" and the like may also be used herein for reference purposes only, and thus are not intended to be limiting. For example, the terms "first", "second" and other such numerical terms referring to structures or elements do not imply a sequence or order unless the context clearly indicates otherwise.

[0036] It should also be understood that when the term “include / comprises” is used in this document, it indicates the existence of the specified features, steps, operations, units and / or components, but does not exclude the existence or addition of one or more other features, steps, operations, units and / or components and / or their combinations.

[0037] Reference Figure 2A and 2B ,In this document, when referring to a "radiator", unless otherwise specified, it means a radiator including one or more radiating arms, e.g. Figure 2BThe dipole radiator 11 shown includes a radiating arm 111 and a radiating arm 112, and the dipole radiator 12 includes a radiating arm 121 and a radiating arm 122. When referring to a "radiating element", unless otherwise specified, it refers to a radiating element including a radiator and a support / feeding member therefor. For example Figure 2A The radiating element shown includes a radiator 11 and a support / feeding element 13 for the radiator 11. The "dual-polarization radiating element" mentioned herein includes two radiating elements arranged orthogonally to each other. For example, it can be a cross-dipole radiating element arranged in an "X" shape or a "cross" shape, or a box-type dual-polarization radiating element arranged in a "mouth" shape. The front view of the cross-dipole radiating element arranged in an "X" shape is shown in FIG. Figure 2B As shown, it includes a radiator 11 and its support / feeding element (not shown) tilted +45 degrees relative to a center line (a dotted line in the figure, which may be, for example, the longitudinal axis of a base station antenna) and a radiator 12 and its support / feeding element (not shown) tilted -45 degrees.

[0038] Figure 3 A base station antenna assembly 200 according to an embodiment of the present disclosure is shown in a bottom view. The base station antenna assembly 200 includes a reflector 211, a plurality of dual-polarized radiating elements 221, 222, 223 mounted to extend forward (in the positive direction of the x-axis shown in the figure) from the front surface of the reflector 211, and a plurality of housing elements 212 located behind the reflector 211. The reflector 211 can be configured to include a metal plate extending substantially along the entire length (longitudinal dimension, in the z-axis direction shown in the figure) of the base station antenna assembly 200 and substantially along the entire width (lateral dimension, in the y-axis direction shown in the figure) of the base station antenna assembly 200. The reflector 211 provides a ground plane, which can be connected to the outer conductor of a coaxial transmission line used to transmit between the base station antenna and the radio unit by galvanic connection, for example.

[0039] The radiator of each radiating element 221, 222, 223 is positioned at a specific position in front of the reflector 211 by the support of the corresponding radiating element. In the illustrated embodiment, the radiating elements include a radiating element 221 operating in a lower frequency band (e.g., transmitting and receiving electromagnetic radiation), a radiating element 223 operating in a higher frequency band, and a radiating element 222 operating in an intermediate frequency band at least partially higher than the lower frequency band and at least partially lower than the higher frequency band. Figure 3 It is shown from a bottom view perspective, so it should be understood that each radiating element shown may correspond to a plurality of identical radiating elements arranged in a column along the longitudinal direction of the base station antenna.

[0040] The base station antenna assembly 200 further includes a plurality of feed boards 51, and each radiating element 221, 222, 223 is mounted to the reflector 211 by being mounted on the feed board 51. The feed board 51 is positioned between the reflector 211 and the radiator corresponding to the feed board 51, for example, fixed on the front surface of the reflector 211. The feed board 51 couples RF signals to the radiators of each radiating element 221, 222, 223 (via the support / feeding member of the corresponding radiating element) and couples RF signals from the radiators of each radiating element 221, 222, 223. Each feed board 51 can be used for one radiating element, or for a plurality of adjacent (for example, 2 or 3) radiating elements in a column of radiating elements. The feed board 51 can be implemented as a printed circuit board (PCB), including a dielectric substrate, a grounded conductor plane formed on the rear surface of the dielectric substrate (for example, by capacitive coupling to the reflector 211), and a conductive trace formed on the front surface of the dielectric substrate.

[0041] The feeding path for feeding the RF signal to each radiator of each radiating element 221, 222, 223 includes a first section of the feeding line extending from the rear of the reflector 211 to the front of the reflector 211, and a second section of the feeding line (e.g., the aforementioned conductive trace) formed on the front surface of the dielectric substrate of the feeding board 51, so that the first section of the feeding line is fed to the corresponding radiator via the second section of the feeding line. The first section of the feeding line can be implemented as a conductive line 310 to be described below, for example. The first section of the feeding line includes a first portion located behind the reflector 211 and a second portion located in front of the reflector 211. The housing element 212 is positioned behind the reflector 211, for example, fixed on the rear surface of the reflector 211, and a chamber for accommodating the first portion of the first section of the feeding line is provided inside it. The housing element 212 is configured to be grounded, for example, capacitively coupled with a ground plane provided by the reflector 211, so that the housing element 212 and the first portion of the first section of the feed line contained therein form a stripline transmission line to transmit RF signals. The second section of the feed line formed on the front surface of the feed board 51 forms a microstrip line transmission line with a grounded conductor plane formed on the rear surface of the feed board 51 to transmit RF signals. The second portion of the first section of the feed line extends to the outside of the housing element 212, extends to the front of the reflector 211 through an opening on the reflector 211, and extends to the front of the feed board 51 through an opening on the feed board 51. The second portion of the first section of the feed line is galvanically connected to the second section of the feed line on the front surface of the feed board 51 to form a feeding path for feeding RF signals to each radiator of each radiating element 221, 222, 223.

[0042] Figure 43 is a side view of a portion of the first section of the feed line in the base station antenna assembly 200. In this example, the first section of the feed line is implemented as a strip-shaped conductive line 310. The conductive line 310 extends in the longitudinal direction of the base station antenna assembly 200 (the z-axis direction in the figure) so as to feed the radiators of a column of radiation elements. The conductive line 310 includes a first portion 311 and a second portion 312. The first portion 311 is located behind the reflector 211 and is accommodated in a cavity provided by the housing element 212. The second portion 312 extends to the outside of the housing element 212, extends to the front of the reflector 211 through the opening on the reflector 211, and extends to the front of the feed board 51 through the opening on the feed board 51. Figure 4 The conductive line 310 shown in FIG. 5 has a plurality of second portions 312 in its length direction (in the z-axis direction shown in the figure). Each second portion 312 extends to the front of a corresponding feed board 51 to feed the corresponding radiator (e.g., a radiator with a specific polarization direction) of one or more radiating elements mounted on the feed board 51. The first portion 311 has an input portion 3111, which can be galvanically connected to the inner conductor of the coaxial transmission line used for transmitting between the base station antenna and the radio unit, so that the input RF signal can be received from the radio unit. The conductive line 310 provides a power divider (a power combiner in the receiving path of the antenna) from the input portion 3111 to the plurality of second portions 312, which are used to divide the RF signal received at the input portion 3111 into a plurality of sub-components output through the respective second portions 312. Each second portion 312 is coupled to the radiator in the corresponding radiating element, for example, via the first section of the feed line on the feed board, so that the plurality of sub-components of the RF signal are respectively fed to the radiators in each radiating element.

[0043] Figure 5A and Figure 5B2 is an enlarged bottom view of the housing element 212 of the base station antenna assembly 200, which shows that the first portion 311 of the conductive wire 310 is accommodated in the cavity provided by the housing element 212, and the second portion 312 of the conductive wire 310 extends to the front of the feed board 51. The housing element 212 includes a housing 23-1 and a housing 23-2, which respectively accommodate the first portion 311-1 of the conductive wire 310-1 and the first portion 311-2 of the conductive wire 310-2. It should be noted that similar elements may be referred to individually by their full reference numerals (e.g., conductive wire 310-1) or collectively by the first portion of their reference numerals (e.g., conductive wire 310). Each housing 23 includes two side walls extending rearward from the reflector 211 substantially perpendicular to the reflector 211, and the two side walls are substantially parallel to the first portion 311 of the conductive wire 310 accommodated therein. The housing element 212 further includes a coupling portion 21 extending substantially parallel to the reflector 211, the coupling portion 21 being capacitively coupled to the reflector 211 via a dielectric layer so that the housing element 212 is grounded, thereby grounding the two side walls of each housing 23, so that the two side walls of the housing 23 and the first portion 311 of the conductive line 310 located between the two side walls form a stripline transmission line.

[0044] The shell 23-1 and the shell 23-2 can be constructed as an integral piece, namely the shell element 212. The entire shell element 212 can be integrally formed of a metal material (e.g., aluminum) using a pultrusion process. In the illustrated embodiment, the shell 23-1 and the shell 23-2 in the shell element 212 are constructed to be separated from each other. In other embodiments, the shell 23-1 and the shell 23-2 in the shell element 212 can be constructed to be adjacent, for example, the side wall of the shell 23-1 close to the shell 23-2 and the side wall of the shell 23-2 close to the shell 23-1 are common side walls, such as Figure 7 shown.

[0045] Will Figure 5A and Figure 5B and Figure 3 It can be seen from the combination that the conductive line 310-1 and the conductive line 310-2 are respectively used to feed the radiator with the first polarization direction (for example, tilted at +45 degrees relative to the center line) and the radiator with the second polarization direction (for example, tilted at -45 degrees) of the dual-polarization radiation element. Figure 4 As shown, there are a plurality of second portions 312 in the length direction. The conductive line 310-1 is used to feed a dual-polarized radiation element (eg Figure 3 The radiators of the first polarization direction of the radiating element 222 are arranged in a linear array, and the conductive line 310-2 is used to feed the dual-polarization radiating element (for example Figure 3The radiators of the second polarization direction of the radiating element 222) are arranged in a linear array.

[0046] Continue to refer to Figure 5A and Figure 5B In the internal chamber of the housing 23, there is a dielectric element 33 between the conductive wire 310 and the side wall of the housing 23. The dielectric element 33 includes a retaining element filled between the conductive wire 310 and the side wall of the housing 23 to retain the conductive wire 310 roughly in the middle of the chamber, which is useful when the conductive wire 310 is thin and / or soft. In a stripline transmission line, a higher dielectric constant of the dielectric between the conductor strip (strip-shaped conductive wire 310) and the ground plane (the two side walls of the housing 23) will result in a lower speed of the RF signal transmitted on the conductor strip. Therefore, it is desired that the retaining element in the dielectric element 33 can cover the conductive wire 310 as little as possible, so that the dielectric between the conductive wire 310 and the side wall of the housing 23 is only air with a low dielectric constant as much as possible. For example, an opening can be constructed on the retaining element to reduce the coverage area of ​​the conductive wire 310 by the retaining element. For another example, the retaining element may be filled only between the dielectric substrate on which the conductive wire 310 depends (for example, when the conductive wire 310 is a conductive trace on a PCB) and the side wall of the housing 23, so that the retaining element may not substantially cover the conductive wire 310. In addition, the dielectric element 33 may also include a moving element that is movable relative to the conductive wire 310 to adjust the relative phase shift applied to the corresponding sub-component of the RF signal output through the conductive wire 310. The relative phase shift is adjusted by changing the coverage area or length of the moving element on different parts of the conductive wire 310, so that the conductive wire 310 can be formed as a sliding dielectric phase shifter integrated with a power divider. It should be understood that the retaining element may be provided with a yield structure at the corresponding position to facilitate the placement and movement of the moving element.

[0047] In some embodiments, the conductive line 310 may be a conductive trace printed on a dielectric substrate. In these embodiments, in order to reduce the loss caused by the dielectric substrate (for example, when the dielectric substrate is thick), the conductive line 310 may include a pair of lines printed on two opposite surfaces of the dielectric substrate. The projection of the first line in the pair of lines on the dielectric substrate completely overlaps with the projection of the second line in the pair of lines on the dielectric substrate, that is, the first line and the second line are symmetrical about the plane where the dielectric substrate is located. For example, Figure 4 Visible in the figure may be a first circuit printed on the first surface of the dielectric substrate or a second circuit printed on the second surface of the dielectric substrate. The first circuit and the second circuit are connected by a conductive through hole (e.g., a plated through hole (PTH)) passing through the dielectric substrate. It should be understood that in other embodiments, the conductive line 310 may be implemented by a sheet of metal. In these embodiments, the conductive line 310 may not rely on the dielectric substrate.

[0048] In other embodiments, the housing 23-1 and the housing 23-2 in the housing element 212 may be constructed to be adjacent and have a common side wall, such as Figure 7 As shown. Figure 7 In the illustrated embodiment, the front portion of the housing element 212 includes a coupling portion 21 that substantially completely covers the cavity provided by the housing 23-1 and the housing 23-2. The coupling portion 21 is formed as a metal plane extending substantially parallel to the reflector 211 so as to capacitively couple to the reflector 211 to ground the housing element 212. The coupling portion 21 that substantially completely covers the cavity of the housing element 212, on the one hand, can make the cavity substantially closed, which helps to improve the efficiency of the stripline transmission line in transmitting RF signals; on the other hand, it can make the coupling area between the coupling portion 21 and the reflector 211 as large as possible, thereby ensuring the degree of coupling between the two grounding elements. In addition, in order to ensure the effectiveness of the grounding connection, a current connection can also be provided between the reflector 211 and the housing element 212, such as Figure 8 As shown, the coupling portion 21 of the housing element 212 is soldered to the reflector 211 (for example, soldered to the opening 24 of the reflector 211 ) by means of conductive solder 25 , so that the ground potentials of the reflector 211 and the housing element 212 are as close to or equal as possible.

[0049] An opening 22 is provided in the coupling portion 21 at the front of the housing element 212 so that the second portion 312 of the conductive wire 310 extends from the opening 22 to the outside (front) of the housing element 212, as shown in FIG. Figure 8 Correspondingly, where the second portion 312 of the conductive wire 310 extends to the outside of the housing element 212, an opening is also provided in the reflector 211, for example Figure 8 The opening 24 shown is provided so that the second portion 312 of the conductive line 310 can pass through. In addition, an opening is also provided at a corresponding position of the feed board 51, for example Fig. 9 The opening 513 is shown so that the second portion 312 of the conductive line 310 passes through and extends to the front of the feed board 51, as shown in FIG. Figure 5B , Figure 6 and Fig. 9 A second section of feed line is formed on the front surface of the feed board 51, which is a conductive trace 511 printed on a dielectric substrate in the illustrated embodiment. Fig. 9As shown, the rear surface of the feed board 51 is printed with a conductor plane 515. The conductor plane 515 is capacitively coupled to the reflector 211, for example, the feed board 51 is mounted on the front surface of the reflector 211, so that the conductor plane 515 printed on its rear surface is capacitively coupled to the reflector 211 via the solder resist material coated on the conductor plane 515, so that the conductor plane 515 on the rear surface of the feed board 51 is grounded. The grounded conductor plane 515 and the dielectric substrate of the feed board 51 form a microstrip line transmission line with the conductive trace 511 to transmit an RF signal to feed the radiator. The conductive trace 511 includes a conductive trace 511-1 for feeding a radiator having a first polarization direction (for example, tilted by +45 degrees relative to the center line) of a dual-polarization radiating element, and a conductive trace 511-2 for feeding a radiator having a second polarization direction (for example, tilted by -45 degrees) of the dual-polarization radiating element. Each conductive trace 511 is coupled to a corresponding radiator, for example, by coupling to a feed of the radiating element to feed the corresponding radiator. The second portion 312 of the conductive line 310 extends to the front of the feed board 51 and is galvanically connected to the conductive trace 511 on the front surface of the feed board 51, for example, by soldering with conductive solder 514, so that the conductive line 310 can feed the RF signal to the radiator of the radiating element via the conductive trace 511.

[0050] like Figure 8 As shown, the second portion 312 of the conductive line 310 extending to the outside of the housing element 212 and continuing to protrude forward may emit electromagnetic radiation outward because it does not have a corresponding ground plane located on one or both sides thereof. In this way, the first electromagnetic radiation emitted by the second portion 312-1 of the conductive line 310-1 used to feed the radiator with a first polarization direction may be coupled to the conductive line 310-2 used to feed the radiator with a second polarization direction, and the second electromagnetic radiation emitted by the second portion 312-2 of the conductive line 310-2 used to feed the radiator with the second polarization direction may be coupled to the conductive line 310-1 used to feed the radiator with the first polarization direction, thereby reducing the isolation between the signals of the two polarization directions of the dual-polarization radiation element. This is caused by the distance between the second portion 312-1 of the conductive line 310-1 and the second portion 312-2 of the conductive line 310-2 (e.g. Figure 5B and Figure 8 This is especially true when the distance D) is close, for example, Figure 7 The case element 212 is shown in which the two cases 23 - 1 and 23 - 2 are constructed adjacent to each other and have a common portion.

[0051] Figure 6The base station antenna assembly 100 according to an embodiment of the present disclosure is shown in a perspective view. In the following description of the base station antenna assembly 100, detailed descriptions of the same or similar elements as those in the base station antenna assembly 200 in the previous embodiment are omitted. The base station antenna assembly 100 includes a reflector 211 configured to provide a ground plane, a feed board 51 positioned in front of the reflector 211, and a housing element 212 positioned behind the reflector 211. Figure 6 The housing element 212 in Figure 7 As shown, it includes a first shell 23-1 and a second shell 23-2. The shell element 212 is capacitively coupled to the ground plane of the reflector 211 so that the first shell 23-1 and the second shell 23-2 are grounded. It should be understood that the base station antenna assembly 100 may also include a radiator positioned in front of the reflector 211 and in front of the feed board 51, including a first radiator and a second radiator. In the illustrated embodiment, the first radiator and the second radiator may be two polarized radiators of a dual-polarization radiating element, and the two radiators are configured to operate within a first frequency band, that is, to send and receive electromagnetic radiation within the first frequency band. The first frequency band may be, for example, a 1.4 to 2.8 GHz band or a sub-band thereof. In other embodiments, the first radiator and the second radiator may not belong to the same radiating element, but may belong to two different radiating elements respectively. In such a case, the first radiator may be configured to transmit and receive electromagnetic radiation within a first frequency band, the second radiator may be configured to transmit and receive electromagnetic radiation within a second frequency band, and the second frequency band overlaps with the first frequency band within a third frequency band (e.g., the first frequency band overlaps with the second frequency band in whole or in part). The feed board 51 may be implemented as a printed circuit board. The feed board 51 includes a dielectric substrate, a conductor plane 515 formed on the rear surface of the dielectric substrate and capacitively coupled to the ground plane to thereby be grounded, and a conductive trace 511 formed on the front surface of the dielectric substrate. It should be understood that Figure 6 Only a portion of the conductive trace 511 is schematically shown.

[0052] A first RF signal is fed to a first radiator through a first feeding path so as to be transmitted in a first polarization direction of a dual-polarization radiating element, and a second RF signal is fed to a second radiator through a second feeding path so as to be transmitted in a second polarization direction of the dual-polarization radiating element. The first feeding path includes a first section of a feeding line extending from the rear of a feeding board 51 to the front of the feeding board 51 and a second section of a feeding line formed on a front surface of a dielectric substrate of the feeding board 51. The first section of the feeding line of the first feeding path is implemented as a first conductive line, for example, it may be the conductive line 310-1 in the aforementioned embodiment. The second section of the feeding line of the first feeding path may be implemented as a conductive trace 511-1 formed on the front surface of the feeding board 51. The first section of the feeding line of the first feeding path is galvanically connected to the second section of the feeding line of the first feeding path, for example, on the front surface of the dielectric substrate, so that the first conductive line is fed to the first radiator via the conductive trace 511-1. The second feeding path includes a first section of the feeding line extending from the rear of the feeding board 51 to the front of the feeding board 51 and a second section of the feeding line of the feeding board 51 formed on the front surface of the dielectric substrate. The first section of the feeding line of the second feeding path is implemented as a second conductive line, for example, it can be the conductive line 310-2 in the aforementioned embodiment. The second section of the feeding line of the first feeding path can be implemented as a conductive trace 511-2 formed on the front surface of the feeding board 51. The first section of the feeding line of the second feeding path is connected to the second section of the feeding line of the second feeding path, for example, on the front surface of the dielectric substrate, so that the second conductive line is fed to the second radiator via the conductive trace 511-2.

[0053] The first section of the feeding line of the first feeding path (hereinafter also referred to as "the first conductive line") includes a first portion positioned (or accommodated) inside the grounded first housing 23-1, so that the first housing 23-1 and the first portion of the first conductive line form a first stripline transmission line. The first conductive line also includes a second portion 312-1 extending to the outside of the first housing 23-1 and extending to the front of the feeding board 51 through the opening 22 on the housing element 212 (the opening 22 penetrates the coupling portion 21 of the cavity formed by the cover housing located at the front of the housing element 212), the opening 24 on the reflector 211 (the opening 24 penetrates the reflector 211 at the point where the second portion 312 protrudes from the housing 23), and the opening 513 on the feeding board 51 (the opening 513 penetrates the feeding board 51 at the point where the second portion 312 protrudes from the housing 23). The second portion 312-1 can be soldered (e.g., by conductive solder 514) to a first end portion of the conductive trace 511-1 adjacent to the opening 513 at the front surface of the feed board 51 so as to feed the first radiator via the conductive trace 511-1. The first section of the feed line of the second feeding path (hereinafter also referred to as "the second conductive line") includes a first portion positioned (or accommodated) inside the grounded second housing 23-2 so that the second housing 23-2 and the first portion of the second conductive line form a second stripline transmission line. The second conductive line also includes a second portion 312-2 extending to the outside of the second housing 23-2 and extending to the front of the feed board 51 through the opening 22 on the housing element 212, the opening 24 on the reflector 211, and the opening 513 on the feed board. The second portion 312-2 can be soldered to a first end portion of the conductive trace 511-2 adjacent to the opening 513 at the front surface of the feed board 51 so as to feed the second radiator via the conductive trace 511-2.

[0054] The base station antenna assembly 100 also includes a decoupling unit positioned in front of the reflector 211 and between the second portion 312-1 of the first conductive line and the second portion 312-2 of the second conductive line. The decoupling unit is configured to decouple the second portion 312-1 of the first conductive line and the second portion 312-2 of the second conductive line. In the case where the first radiator and the second radiator are two polarized radiators of a dual-polarized radiation element operating in the first frequency band, the first conductive line transmits a first RF signal in the first frequency band for the first radiator, and the second conductive line transmits a second RF signal in the first frequency band for the second radiator. At this time, the decoupling unit is configured to decouple the second portion 312-1 of the first conductive line and the second portion 312-2 of the second conductive line in the first frequency band. In the case where the first radiator and the second radiator are two separate radiators operating in the first frequency band and the second frequency band respectively (where the second frequency band overlaps with the first frequency band in the third frequency band), the first conductive line transmits a first RF signal in the first frequency band for the first radiator, and the second conductive line transmits a second RF signal in the second frequency band for the second radiator. At this time, the decoupling unit is configured to decouple the second portion 312 - 1 of the first conductive line and the second portion 312 - 2 of the second conductive line at least within the third frequency band.

[0055] In the illustrated embodiment, the decoupling unit is implemented as a slot resonator. The slot resonator includes a conductor plane and a slot formed in the conductor plane. In the illustrated embodiment, the conductor plane of the slot resonator is a grounded conductor plane 515 formed on the rear surface of the feed board 51, and a slot 512 is formed in the conductor plane 515. The slot 512 is formed in the conductor plane 515 of the feed board 51 to form a slot resonator used as a decoupling unit, and the existing structure in the base station antenna can be reused, thereby adding a decoupling unit without adding additional components. In this case, the conductive trace 511 used as a feeding path formed on the front surface of the feed board 51 needs to avoid the slot 512 (in the front plan view of the base station antenna assembly 100).

[0056] The slot resonator is configured to resonate at a first frequency (e.g., have a resonant frequency of the first frequency). In the case where the first radiator and the second radiator are two polarized radiators of a dual-polarized radiating element operating in a first frequency band, the slot resonator is configured to have a resonant frequency within the first frequency band. In the case where the first radiator and the second radiator are two separate radiators operating in the first frequency band and the second frequency band, respectively (wherein the second frequency band overlaps with the first frequency band in a third frequency band), the slot resonator is configured to have a resonant frequency within the third frequency band. As shown in the figure, the slot resonator is positioned between the second portion 312-1 of the first conductive line and the second portion 312-2 of the second conductive line. Optionally, the decoupling unit is disposed closer to the reflector 211 in the thickness direction of the base station antenna (the direction of the x-axis shown in the figure), for example, the distance between the rear surface of the decoupling unit and the front surface of the reflector 211 is less than the thickness of the reflector 211. In the illustrated embodiment, the slot resonator is disposed on the rear surface of the feeding board 51.

[0057] The slot resonator is positioned between the second portion 312-1 of the first conductive line and the second portion 312-2 of the second conductive line, so that the slot resonator can be excited by both the energy radiated by the second portion 312-1 of the first conductive line and the energy radiated by the second portion 312-2 of the second conductive line. Fig. 9 as shown) and width W (as Fig. 9 The slot resonator 512 is configured as required. The length L of the slot resonator 512 affects the resonant frequency of the slot resonator, and the width W of the slot resonator 512 affects the amplitude and bandwidth of the slot resonator resonance. The slot resonator can be configured so that the electromagnetic radiation emitted by the slot resonator due to the energy excitation radiated by the second part 312-1 of the first conductive line and the electromagnetic radiation emitted by the second part 312-1 of the first conductive line are substantially equal in amplitude and anti-phase when reaching the second part 312-2 of the second conductive line, thereby canceling each other out; and the electromagnetic radiation emitted by the slot resonator due to the energy excitation radiated by the second part 312-2 of the second conductive line and the electromagnetic radiation emitted by the second part 312-2 of the second conductive line are substantially equal in amplitude and anti-phase when reaching the second part 312-1 of the first conductive line, thereby canceling each other out. In this way, the second part 312-1 of the first conductive line and the second part 312-2 of the second conductive line can be decoupled by configuring the slot resonator to improve the isolation performance between the first radiator and the second radiator.

[0058] It should be understood that in other embodiments, the decoupling unit may also be implemented in other forms besides the slot resonator. For example, the decoupling unit may include a radiator having a first resonant frequency, the first resonant frequency being within both the operating frequency band of the first radiator and the operating frequency band of the second radiator. The radiator may be excited by both the energy radiated by the second portion 312-1 of the first conductive line and the energy radiated by the second portion 312-2 of the second conductive line. Thus, the electromagnetic radiation mutually coupled between the second portion 312-1 of the first conductive line and the second portion 312-2 of the second conductive line may be offset or reduced by configuring the radiator, thereby decoupling between the second portion 312-1 of the first conductive line and the second portion 312-2 of the second conductive line.

[0059] The slot resonator includes a slot 512 extending between the second portion 312-1 of the first conductive line and the second portion 312-2 of the second conductive line. In the illustrated embodiment, the second portion 312-1 of the first conductive line and the second portion 312-2 of the second conductive line are opposite in a first direction (e.g., direction D1 in the illustration), and the slot 512 extends in a second direction (e.g., direction D2 in the illustration) perpendicular to the first direction in a conductor plane 515. In the case where the slot resonator is implemented as including the slot 512 formed in the conductor plane 515 on the rear surface of the feeding board 51, a schematic plan view of the rear surface of the feeding board 51 is shown in FIG. Fig. 9 Two openings 513 penetrating the feed board 51 for passing the conductive wire 310 are opposite to each other in a first direction, and the slit 512 extends between the two openings 513 along a second direction perpendicular to the first direction. Figure 6 and Fig. 9 The shape of the gap 512 in the embodiment shown is as follows: Fig.10 As shown in (a) of FIG. 1 , the main diameter of the slot 41 includes a U-shaped slot main diameter 41 extending in the second direction and a pair of slot branches 42 extending in opposite directions in the first direction. The extending direction of the slot branches 42 is substantially perpendicular to the extending direction of the slot main diameter 41. It should be understood that the shape of the slot main diameter 41 is not limited to the U-shape. In other embodiments, for example, it can be a linear slot (such as Fig.11 (e) in the figure), U-shaped gap (as shown in Fig.11 (c) and (d) in the figure), double U-shaped gap (as shown in Fig.11 (a) in the figure), C-shaped gap (as shown in Fig.11 half of the gap shown in (e) in FIG. 1 ), or a double C-shaped gap (such as Fig.11The number and form of the slit branches 42 are also not limited to a pair of slit branches 42 extending oppositely along the first direction. For example, only one slit branch 42 (rather than a pair of slit branches 42) may be provided on one slit main diameter 41 (rather than two opposite slit main diameters 41). The two oppositely arranged slit branches 42 may not be directly opposite, for example, the positions of the two slit branches 42 along the second direction may be different. The slit branches 42 may be provided at the ends of the slit main diameter 41 (such as Fig.10 (b) in the figure), it can also be set in the middle of the main diameter of the gap 41 (as shown in Fig.10 As shown in (a) in FIG. 1 ). A plurality of pairs of gap branches 42 may be included, such as Fig.10 As shown in (c) in the figure. The two slot branches 42 in each pair of the multiple pairs of slot branches 42 can be opposite (as shown in the figure) or staggered (not shown). In addition, the slot branch 42 can also include a sub-branch (not shown) that extends further, for example, the middle or end of the slot branch 42 can include a sub-branch extending along the second direction. The provision of the slot branch 42 helps to reduce the size of the slot 512 in the first direction and / or the second direction, thereby saving its occupied area on the feed board 51.

[0060] Fig.12 Shows Figure 6 The curve of the isolation between the two polarizations when the base station antenna assembly 100 is used to feed the cross-dipole radiating element (curve 2) and the curve of the isolation between the two polarizations when the base station antenna assembly without the above-mentioned decoupling unit is used to feed the cross-dipole radiating element (curve 1) are compared with the frequency variation. It can be seen that the base station antenna assembly including the above-mentioned decoupling unit is used to feed the cross-dipole radiating element. Figure 6 The base station antenna assembly 100 of the decoupling unit shown can improve the isolation between the two polarizations of the cross-dipole radiating element to less than -30 dB in the frequency range of 1.4 to 2.7 GHz.

[0061] In addition, the embodiments of the present disclosure may also include the following examples:

[0062] 1. A base station antenna assembly, comprising:

[0063] a reflector configured to provide a ground plane;

[0064] a first radiator positioned forward of the reflector, the first radiator being configured to transmit and receive electromagnetic radiation within a first frequency band;

[0065] a second radiator positioned forward of the reflector, the second radiator configured to transmit and receive electromagnetic radiation within a first frequency band;

[0066] A first feeding path, configured to feed a first radio frequency signal to a first radiator, the first feeding path comprising a first feeding line extending from the rear of the reflector to the front of the reflector;

[0067] a second feeding path configured to feed a second radio frequency signal to a second radiator, the second feeding path comprising a first section of a feeding line extending from the rear of the reflector to the front of the reflector; and

[0068] A slot resonator is positioned between a portion of a first section of a feed line of a first feed path extending in front of the reflector and a portion of a first section of a feed line of a second feed path extending in front of the reflector, wherein the slot resonator is configured to resonate at a first frequency, wherein the first frequency is within a first frequency band.

[0069] 2. The base station antenna assembly according to item 1, further comprising:

[0070] a feed board positioned between the reflector and the first radiator and between the reflector and the second radiator, the feed board comprising a dielectric substrate and a conductor plane formed on a rear surface of the dielectric substrate and capacitively coupled to the ground plane, wherein

[0071] The first section of the feeding line of the first feeding path also passes through the feeding board and extends to the front of the feeding board, and the first section of the feeding line of the second feeding path also passes through the feeding board and extends to the front of the feeding board, and

[0072] The slot resonator includes a slot formed in the conductor plane.

[0073] 3. The base station antenna assembly according to 2, wherein:

[0074] The first feed path further includes a second feed line segment formed on the front surface of the dielectric substrate, the first feed line segment of the first feed path being galvanically connected to the second feed line segment of the first feed path on the front surface of the dielectric substrate; and

[0075] The second feeding path further includes a second feeding line segment formed on the front surface of the dielectric substrate, and the first feeding line segment of the second feeding path is galvanically connected to the second feeding line segment of the second feeding path on the front surface of the dielectric substrate.

[0076] 4. The base station antenna assembly according to 2, wherein:

[0077] A portion of the first section of the first feeding line of the first feeding path extending in front of the feeding board is opposite to a portion of the first section of the second feeding line of the second feeding path extending in front of the feeding board in a first direction, and

[0078] The slit extends along a second direction perpendicular to the first direction.

[0079] 5. The base station antenna assembly according to 2, wherein the slot comprises a linear slot, a U-shaped slot, a double U-shaped slot, a C-shaped slot, or a double C-shaped slot.

[0080] 6. The base station antenna assembly according to 2, wherein the slot comprises one or more slot branches extending along the first direction.

[0081] 7. The base station antenna assembly according to 3, wherein the second feeding line section of the first feeding path or the second feeding line section of the second feeding path avoids the gap in a front plan view of the base station antenna assembly.

[0082] 8. The base station antenna assembly according to item 1, further comprising:

[0083] a first housing positioned behind the reflector and capacitively coupled to the ground plane, the first housing being configured to receive a first portion of a first feed line segment of a first feed path therein, so that the first housing and the first portion of the first feed line segment of the first feed path form a first stripline transmission line;

[0084] a second housing positioned behind the reflector and capacitively coupled to the ground plane, the second housing being configured to receive a first portion of a first section of a feed line of a second feed path therein, so that the second housing and the first portion of the first section of the feed line of the second feed path form a second stripline transmission line, wherein

[0085] A second portion of the first section of the feeding line of the first feeding path extends from the inside of the first housing, passes through the reflector, and extends to the front of the reflector; and

[0086] A second portion of the first section of the feeding line of the second feeding path extends out from the interior of the second housing, passes through the reflector, and extends to the front of the reflector.

[0087] 9. The base station antenna assembly according to 8, wherein the first housing and the second housing are constructed as an integral piece and the first housing and the second housing include a common portion.

[0088] 10. The base station antenna assembly according to 1, wherein the first radiator has a first polarization direction, and the second radiator has a second polarization direction orthogonal to the first polarization direction.

[0089] 11. The base station antenna assembly according to item 1, wherein the first feed line segment of the first feed path or the first feed line segment of the second feed path is formed of sheet metal or a conductive trace printed on a dielectric substrate.

[0090] 12. The base station antenna assembly according to 3, wherein the second section of the feed line of the first feed path or the second section of the feed line of the second feed path is formed by a conductive trace on the dielectric substrate.

[0091] 13. A base station antenna assembly, comprising:

[0092] Grounded reflector;

[0093] A grounded first housing positioned behind the reflector;

[0094] a grounded second housing positioned behind the reflector;

[0095] a first conductive line, comprising a first portion positioned inside the first housing and a second portion extending outside the first housing, the first portion of the first conductive line being configured to form a first stripline transmission line with the first housing;

[0096] a second conductive line including a first portion positioned inside the second housing and a second portion extending outside the second housing, the first portion of the second conductive line being configured to form a second stripline transmission line with the second housing; and

[0097] A feed board is positioned in front of the reflector, the feed board comprising a dielectric substrate and a grounded conductor plane formed on a rear surface of the dielectric substrate, wherein:

[0098] The second portion of the first conductive line passes through the reflector and the feed plate and extends to the front of the feed plate.

[0099] A second portion of the second conductive line passes through the reflector and the feed plate and extends to the front of the feed plate, and

[0100] A gap is formed in the conductor plane between the second portion of the first conductive line and the second portion of the second conductive line.

[0101] 14. The base station antenna assembly according to 13, wherein:

[0102] The second portion of the first conductive line is opposite to the second portion of the second conductive line in the first direction, and

[0103] The slit extends along a second direction perpendicular to the first direction.

[0104] 15. The base station antenna assembly according to 13, wherein the slot comprises a linear slot, a U-shaped slot, a double U-shaped slot, a C-shaped slot, or a double C-shaped slot.

[0105] 16. The base station antenna assembly according to 14, wherein the slot comprises one or more slot branches extending along the first direction.

[0106] 17. The base station antenna assembly of 13, wherein the feed board further comprises a conductive trace formed on the front surface of the dielectric substrate, the conductive trace avoiding the gap in a front plan view of the base station antenna assembly.

[0107] 18. The base station antenna assembly according to 13, wherein the first conductive line or the second conductive line is formed of a sheet metal or a conductive trace printed on a dielectric substrate.

[0108] 19. The base station antenna assembly according to 13, wherein the first shell and the second shell are adjacent.

[0109] 20. The base station antenna assembly according to 13, wherein the first housing and the second housing are constructed as an integral piece and the first housing and the second housing include a common portion.

[0110] 21. The base station antenna assembly of claim 13, wherein the first housing and the second housing are capacitively coupled to the ground plane.

[0111] 22. The base station antenna assembly according to 13, further comprising:

[0112] a first radiator positioned in front of the reflector and having a first polarization direction, the first radiator being configured to transmit and receive electromagnetic radiation within a first frequency band; and

[0113] a second radiator, positioned in front of the reflector and having a second polarization direction orthogonal to the first polarization direction, the second radiator being configured to transmit and receive electromagnetic radiation within a first frequency band, wherein,

[0114] The feed board further includes a conductive trace formed on the front surface of the dielectric substrate, the first conductive line is fed to the first radiator via the conductive trace, the second conductive line is fed to the second radiator via the conductive trace, and

[0115] The slot is configured to resonate at a first frequency, wherein the first frequency is within a first frequency band.

[0116] 23. The base station antenna assembly according to 13, further comprising:

[0117] a first radiator positioned forward of the reflector, the first radiator being configured to transmit and receive electromagnetic radiation within a first frequency band;

[0118] a second radiator, positioned in front of the reflector, the second radiator being configured to transmit and receive electromagnetic radiation within a second frequency band, wherein:

[0119] The feed board further includes a conductive trace formed on the front surface of the dielectric substrate, the first conductive line is fed to the first radiator via the conductive trace, the second conductive line is fed to the second radiator via the conductive trace, and

[0120] The slot is configured to resonate at a first frequency, wherein the first frequency is within a first frequency band and within a second frequency band.

[0121] 24. A base station antenna assembly, comprising:

[0122] a reflector configured to provide a ground plane;

[0123] a first radiator positioned forward of the reflector, the first radiator being configured to transmit and receive electromagnetic radiation within a first frequency band;

[0124] a second radiator positioned forward of the reflector, the second radiator being configured to transmit and receive electromagnetic radiation within a second frequency band that overlaps the first frequency band within a third frequency band;

[0125] A grounded first housing positioned behind the reflector;

[0126] a grounded second housing positioned behind the reflector;

[0127] A first conductive line for feeding a first radiator, comprising a first portion positioned inside the first housing and a second portion extending outside the first housing and extending through the reflector to the front of the reflector, the first portion of the first conductive line being configured to form a first stripline transmission line with the first housing;

[0128] a second conductive line for feeding a second radiator, comprising a first portion positioned inside the second housing and a second portion extending outside the second housing and extending through the reflector to the front of the reflector, the first portion of the second conductive line being configured to form a second stripline transmission line with the second housing; and

[0129] A decoupling unit is positioned in front of the reflector and between the second portion of the first conductive line and the second portion of the second conductive line, and is configured to decouple the second portion of the first conductive line and the second portion of the second conductive line at least within a third frequency band.

[0130] 25. The base station antenna assembly according to 24, wherein a distance between a rear surface of the decoupling unit and a front surface of the reflector is less than a thickness of the reflector.

[0131] 26. The base station antenna assembly of claim 24, wherein the decoupling unit comprises a radiator configured to resonate at a first frequency, wherein the first frequency is within a third frequency band.

[0132] 27. The base station antenna assembly according to any one of 24-23, wherein the decoupling unit comprises a slot formed in a conductor plane, the slot being configured to resonate at a first frequency, wherein the first frequency is within a third frequency band.

[0133] 28. The base station antenna assembly according to 27, wherein:

[0134] The second portion of the first conductive line is opposite to the second portion of the second conductive line in the first direction, and

[0135] The slit extends along a second direction perpendicular to the first direction.

[0136] 29. The base station antenna assembly according to 27, wherein the slot comprises a linear slot, a U-shaped slot, a double U-shaped slot, a C-shaped slot, or a double C-shaped slot.

[0137] 30. The base station antenna assembly according to 27, wherein the slot comprises one or more slot branches extending along the first direction.

[0138] 31. The base station antenna assembly according to 27, further comprising:

[0139] a printed circuit board positioned between the reflector and the first radiator and between the reflector and the second radiator, wherein

[0140] The slit is formed on a rear surface of the printed circuit board.

[0141] 32. A base station antenna assembly according to 31, wherein the printed circuit board includes a conductive trace formed on its front surface, a first conductive line is fed to the first radiator via the conductive trace, a second conductive line is fed to the second radiator via the conductive trace, and wherein the conductive trace avoids the gap in the front plan view of the base station antenna assembly.

[0142] 33. The base station antenna assembly according to 24, wherein the first conductive line or the second conductive line is formed of a sheet metal or a conductive trace printed on a dielectric substrate.

[0143] 34. The base station antenna assembly of 24, wherein the first shell and the second shell are adjacent.

[0144] 35. The base station antenna assembly of claim 24, wherein the first shell and the second shell are constructed as an integral piece and the first shell and the second shell include a common portion.

[0145] 36. The base station antenna assembly of claim 24, wherein the first shell and the second shell are capacitively coupled to the ground plane.

[0146] 37. A printed circuit board for use in a base station antenna, the printed circuit board being positioned in front of a reflector of the base station antenna and behind a dual polarized radiating element of the base station antenna, the printed circuit board comprising:

[0147] dielectric substrate;

[0148] A first conductive trace and a second conductive trace formed on the front surface of the dielectric substrate, the first conductive trace being used to feed a first polarized radiator of the dual-polarized radiating element, and the second conductive trace being used to feed a second polarized radiator of the dual-polarized radiating element;

[0149] A conductor plane is formed on the rear surface of the dielectric substrate, wherein

[0150] The conductor plane has a slot formed therein, the slot extending between the first conductive trace and the second conductive trace.

[0151] 38. The printed circuit board of 37, wherein the slot is configured to resonate at a frequency within an operating band of the dual polarized radiating element.

[0152] 39. The printed circuit board according to 37, wherein the gap comprises a linear gap, a U-shaped gap, a double U-shaped gap, a C-shaped gap, or a double C-shaped gap.

[0153] 40. The printed circuit board of claim 37, wherein the gap comprises one or more gap branches.

[0154] 41. The printed circuit board according to 37, further comprising:

[0155] a first opening extending through the printed circuit board, a first end of the first conductive trace adjacent the first opening; and

[0156] a second opening extending through the printed circuit board, the first end of the second conductive trace being adjacent to the second opening,

[0157] The first opening and the second opening are opposite to each other in a first direction, and the gap extends between the first opening and the second opening along a second direction perpendicular to the first direction.

[0158] 42. The printed circuit board of claim 37, wherein the first conductive trace or the second conductive trace avoids the gap in a front plan view of the printed circuit board.

[0159] 43. The printed circuit board of claim 37, wherein the conductor plane is capacitively coupled to the reflector.

[0160] Although some specific embodiments of the present disclosure have been described in detail by way of example, it should be understood by those skilled in the art that the above examples are for illustration only and are not intended to limit the scope of the present disclosure. The various embodiments disclosed herein may be combined in any manner without departing from the spirit and scope of the present disclosure. It should also be understood by those skilled in the art that various modifications may be made to the embodiments without departing from the scope and spirit of the present disclosure. The scope of the present disclosure is defined by the appended claims.

Claims

1. A base station antenna assembly, comprising: a reflector configured to provide a ground plane; a first radiator positioned forward of the reflector, the first radiator being configured to transmit and receive electromagnetic radiation within a first frequency band; a second radiator positioned forward of the reflector, the second radiator being configured to transmit and receive electromagnetic radiation within a first frequency band; A first feeding path, configured to feed a first radio frequency signal to a first radiator, the first feeding path comprising a first feeding line extending from the rear of the reflector to the front of the reflector; A second feeding path, configured to feed a second radio frequency signal to a second radiator, the second feeding path comprising a first section of a feeding line extending from the rear of the reflector to the front of the reflector; as well as A slot resonator is positioned between a portion of a first section of a feed line of a first feed path extending in front of the reflector and a portion of a first section of a feed line of a second feed path extending in front of the reflector, wherein the slot resonator is configured to resonate at a first frequency, wherein the first frequency is within a first frequency band.

2. The base station antenna assembly according to claim 1, further comprising: a feed board positioned between the reflector and the first radiator and between the reflector and the second radiator, the feed board comprising a dielectric substrate and a conductor plane formed on a rear surface of the dielectric substrate and capacitively coupled to the ground plane, wherein The first section of the feeding line of the first feeding path also passes through the feeding board and extends to the front of the feeding board, and the first section of the feeding line of the second feeding path also passes through the feeding board and extends to the front of the feeding board, and The slot resonator includes a slot formed in the conductor plane.

3. The base station antenna assembly according to claim 2, wherein: The first feed path further comprises a second section of feed line formed on the front surface of the dielectric substrate, the first section of feed line of the first feed path being galvanically connected to the second section of feed line of the first feed path on the front surface of the dielectric substrate; as well as The second feeding path further includes a second feeding line segment formed on the front surface of the dielectric substrate, and the first feeding line segment of the second feeding path is galvanically connected to the second feeding line segment of the second feeding path on the front surface of the dielectric substrate.

4. The base station antenna assembly according to claim 2, wherein: A portion of the first section of the first feeding line of the first feeding path extending in front of the feeding board is opposite to a portion of the first section of the second feeding line of the second feeding path extending in front of the feeding board in a first direction, and The slit extends along a second direction perpendicular to the first direction.

5. The base station antenna assembly according to claim 2, wherein: The gap includes a linear gap, a U-shaped gap, a double U-shaped gap, a C-shaped gap, or a double C-shaped gap.

6. The base station antenna assembly according to claim 2, wherein: The slit includes one or more slit branches extending along a first direction.

7. The base station antenna assembly according to claim 3, wherein: The second section of the feeding line of the first feeding path or the second section of the feeding line of the second feeding path avoids the gap in the front plan view of the base station antenna assembly.

8. A base station antenna assembly, comprising: Grounded reflector; A grounded first housing positioned behind the reflector; a grounded second housing positioned behind the reflector; a first conductive line, comprising a first portion positioned inside the first housing and a second portion extending outside the first housing, the first portion of the first conductive line being configured to form a first stripline transmission line with the first housing; a second conductive line including a first portion positioned inside the second housing and a second portion extending outside the second housing, the first portion of the second conductive line being configured to form a second stripline transmission line with the second housing; as well as A feed board is positioned in front of the reflector, the feed board comprising a dielectric substrate and a grounded conductor plane formed on a rear surface of the dielectric substrate, wherein: The second portion of the first conductive line passes through the reflector and the feed plate and extends to the front of the feed plate. A second portion of the second conductive line passes through the reflector and the feed plate and extends to the front of the feed plate, and A gap is formed in the conductor plane between the second portion of the first conductive line and the second portion of the second conductive line.

9. A base station antenna assembly, comprising: a reflector configured to provide a ground plane; a first radiator positioned forward of the reflector, the first radiator being configured to transmit and receive electromagnetic radiation within a first frequency band; a second radiator positioned forward of the reflector, the second radiator being configured to transmit and receive electromagnetic radiation within a second frequency band that overlaps the first frequency band within a third frequency band; A grounded first housing positioned behind the reflector; a grounded second housing positioned behind the reflector; A first conductive line for feeding a first radiator, comprising a first portion positioned inside the first housing and a second portion extending outside the first housing and extending through the reflector to the front of the reflector, the first portion of the first conductive line being configured to form a first stripline transmission line with the first housing; a second conductive line for feeding a second radiator, comprising a first portion positioned inside the second housing and a second portion extending outside the second housing and extending through the reflector to the front of the reflector, the first portion of the second conductive line being configured to form a second stripline transmission line with the second housing; as well as A decoupling unit is positioned in front of the reflector and between the second portion of the first conductive line and the second portion of the second conductive line, and is configured to decouple the second portion of the first conductive line and the second portion of the second conductive line at least within a third frequency band.

10. A printed circuit board for use in a base station antenna, the printed circuit board being positioned in front of a reflector of the base station antenna and behind a dual-polarized radiating element of the base station antenna, the printed circuit board comprising: dielectric substrate; A first conductive trace and a second conductive trace formed on the front surface of the dielectric substrate, the first conductive trace being used to feed a first polarized radiator of the dual-polarized radiating element, and the second conductive trace being used to feed a second polarized radiator of the dual-polarized radiating element; A conductor plane is formed on the rear surface of the dielectric substrate, wherein The conductor plane has a slot formed therein, the slot extending between the first conductive trace and the second conductive trace.

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