Small base station antenna device and connector thereof

Abstract

The present invention relates to a small base station antenna device and a connector thereof, in particular, comprising: a radio unit (RU; (Radio Unit); at least one antenna module provided so as to be able to tilt and turn with respect to the wireless unit; and a multi-function link for intervening in the setting of the wireless unit by each of the antenna modules, the multi-function link comprising: a center body; a first fixing portion connected between the antenna modules in both end portions of the center body; and a second fixing portion connected between the wireless units at both end portions of the center body, the first fixing portion and the second fixing portion being coupled via a ball socket joint portion such that the antenna module is provided so as to be able to tilt and turn relative to the wireless units.

Description

Technical Field

[0001] The present invention relates to a small cell base station antenna device and a connector thereof, and more particularly, to a small cell base station antenna device and a connector thereof, which can prevent the appearance of cables from being exposed and facilitate the construction of an indoor small cell, and can cover different frequency bands by dividing a part of an antenna module or making multiple antenna modules cover different frequency bands respectively, thereby realizing beamforming in a dual-band manner. Background Art

[0002] In order to meet the demand for wireless data traffic, which is on an increasing trend after the commercialization of 4G communication systems, efforts are being made to develop improved 5G communication systems or pre-5G communication systems. Therefore, 5G communication systems or pre-5G communication systems are called communication systems beyond 4G networks or systems after LTE systems (Post LTE). In order to achieve high data transmission rates, 5G communication systems are considering implementation in ultra-high frequency (mmWave) bands (for example, 60 gigahertz (60GHz) bands, etc.). In order to alleviate the path loss of radio waves in ultra-high frequency bands and increase the transmission distance of radio waves, beamforming, massive multiple-input multiple-output (massive MIMO), full-dimensional multiple-input multiple-output (Full Dimensional MIMO: FD-MIMO), array antennas, analog beam-forming, and large scale antenna technologies are being discussed in 5G communication systems.

[0003] In particular, in future 5G cellular networks that require higher capacity than the current capacity, various technologies that improve frequency efficiency can be applied. Small Cell Network (SCN) technology, one of the candidate technologies, can improve channel utility by miniaturizing the cell size, and can improve frequency efficiency and increase capacity by increasing the density of cells.

[0004] Small Cell is different from the previous macrocell with high transmission power and wide coverage. It is a small base station with low transmission power and narrow coverage. The scope of small cell is small power base station equipment below 10W, which is a general term for pico cell, femto cell, Wi-Fi, etc. The advantage of small cell is that it reduces the construction cost compared to macrocell and is smaller in size, which can improve space efficiency.

[0005] If such microcells are overlapped in public places, densely populated areas, and indoor areas such as large shopping malls or airport buildings, the capacity per unit area can be increased. This is also an advantage because the power consumed by a macrocell base station and the installation cost can be reduced. Since microcell base stations alone can achieve 1,000 times the capacity of conventional LTE, microcells are expected to become the basic technology for connecting 4G and 5G.

[0006] Figure 1 FIG. 1 is a perspective view showing the appearance of a base station antenna device according to a conventional embodiment.

[0007] like Figure 1 As shown, the base station antenna device of the prior embodiment is formed into the following structure: it is set outdoors (outdoors), and the antenna module 10 is installed on the upright support pole 11 by means of fixing brackets 30 and 31, and the wireless unit 12 is installed on the lower side of the antenna module 10 by means of fixing brackets 32 and 33, and the antenna module 10 and the wireless unit 12 are electrically connected by means of multiple cables 14. The fixing brackets 30 and 31 are formed into the following structure: they are respectively arranged at the upper and lower ends of the antenna module 10 to be fixed to the support pole 11, and are respectively arranged at the upper and lower ends of the wireless unit 12 to be fixed to the support pole 11. The fixing brackets 30, 31, 32, and 33 play the role of fixing by means of fasteners such as screws, bolts, nuts, etc.

[0008] However, the existing base station antenna device has a structure that is limited to outdoor (indoor) installation and must be installed via a support pole 11, and is formed in a structure in which an antenna module 10 is installed on the relatively upper side of the support pole 11, and a wireless unit 12, such as an RRH (Remote Radio Head), is installed on the relatively lower side, and then connected using a cable 14. Therefore, there is a problem of reduced aesthetics due to the cable 14 being exposed to the outside.

[0009] As described above, when a microcell base station is set up indoors, the appearance is reduced due to the complex cable connection between the wireless unit (RRH) and the antenna module, and each wireless unit (RRH) has only one antenna module, so it is difficult to actually achieve dual-band coverage. Summary of the invention

[0010] Technical issues

[0011] The present invention is proposed to solve the above technical problems, and its purpose is to provide a small base station antenna device and its connector that are convenient for building micro cells in public places, densely populated areas, large shopping malls or airport buildings.

[0012] At the same time, another object of the present invention is to provide a small base station antenna device and its connector that can adjust the directivity even without exposing various cables for electrical connection between the wireless unit and the antenna module to the outside, thereby preventing the reduction of aesthetics (appearance beauty).

[0013] Furthermore, another object of the present invention is to provide a small base station antenna device and its connector that can realize dual-band in various locations by dividing a part of an antenna module to cover different frequency bands or making multiple antenna modules cover different frequency bands respectively.

[0014] Furthermore, another object of the present invention is to provide a small base station antenna device and a connector thereof that greatly ensures the directivity adjustment angle by interposing multiple antenna modules on each multifunctional link of the wireless unit.

[0015] Meanwhile, another object of the present invention is to provide a small base station antenna device and a connector thereof that are easy to install by utilizing the multifunctional connecting rod of the small base station antenna device.

[0016] The technical problems of the present invention are not limited to the problems mentioned above, and ordinary technicians in the technical field to which the present invention belongs can clearly understand other technical problems not mentioned through the following description.

[0017] Solutions to the problem

[0018] A small base station antenna device according to one embodiment of the present invention includes: a radio unit (RU); at least one antenna module, which is arranged in a manner that can be tilted and turned relative to the radio unit; and a multi-function link (Multi Function Link), which is used to intervene in the setting of each antenna module to the radio unit, and the multi-function link includes: a central body; a first fixing part, which is connected between the antenna modules at both ends of the central body; and a second fixing part, which is connected between the radio units at both ends of the central body, and the first fixing part and the second fixing part are combined via a ball joint part, so that the antenna module is arranged in a manner that can be tilted, rotated and turned relative to the radio unit.

[0019] Among them, the ball and socket joint part may include: a first ball and socket joint part, a part of one of the two end parts is accommodated and combined with the internal space of the first fixed part, and the other end part is connected to the antenna module, so that the antenna module can be directionally adjusted by tilting or turning action; and a second ball and socket joint part, a part of one of the two end parts is accommodated and combined with the internal space of the second fixed part, and the other end part is connected to a cable receiving tube used to intervene in the connection with the wireless unit, so as to further adjust the direction of the antenna module.

[0020] Furthermore, the multifunctional link may be electrically connected to the antenna module and the wireless unit via a connector.

[0021] Furthermore, the connector may include: a male connector connected to the front end of a plurality of coaxial cables hidden and accommodated inside the multifunctional connecting rod; and a female connector provided at the antenna module and the wireless unit.

[0022] Furthermore, the present invention may include a coupling flange and a female terminal, wherein, when the female connector is disposed in the wireless unit, the coupling flange has an inner side surface directly connected to the RF filter disposed inside the wireless unit, and the female terminal has an outer side surface connected to the male connector.

[0023] Furthermore, in the female connector, a number of through pin terminals corresponding to the number of the coaxial cables may be formed through the female connector to connect the inner side surface of the coupling flange and the outer side surface of the female terminal.

[0024] Furthermore, the number of the multiple coaxial cables can be set to two for constructing a 2T2R transmission line between the wireless unit and the antenna module and one of four for constructing a 4T4R transmission line between the wireless unit and the antenna module, and terminal pins corresponding to the number of the multiple coaxial cables can be formed in the male connector, and terminal grooves into which the terminal pins are respectively inserted and connected can be correspondingly formed in the female connector.

[0025] Furthermore, in the female connector, the coupling flange may be directly fastened to the RF filter using a plurality of screws in a state of being engaged with the RF filter.

[0026] Furthermore, the front end of each through-pin terminal of the female connector can be directly connected to the feeding connector provided on the RF filter.

[0027] Furthermore, the male connector may further include a grounding washer. When four coaxial cables are provided, the grounding washers are provided in odd numbers at the center of the terminal pins corresponding to the coaxial cables.

[0028] Furthermore, the cable storage tube can accommodate multiple coaxial cables so as to be hidden from the outside, one end of which is connected to the wireless unit and the other end is connected to the fixing part, and the male connector can be connected to one end and the other end of the coaxial cable.

[0029] Furthermore, the positive connector may include: a male terminal connected to one end and the other end of the coaxial cable; a plurality of guide pins protruding from the male terminal toward the female connector; a plurality of terminal pins extending from the coaxial cable and extending while protruding from the male terminal toward the female connector; and a fixing nut maintaining the electrical connection force of the plurality of terminal pins on the female connector.

[0030] Furthermore, the fixing nut can maintain the connection force by being fastened to the nut fastening end provided on the female connector.

[0031] Furthermore, the antenna module can arrange a plurality of antenna sub-arrays covering dual frequency bands on one antenna board, and implement antenna beamforming in different frequency bands within the same direction of the antenna module set by the multifunctional link.

[0032] Furthermore, a plurality of antenna sub-arrays may be arranged on the antenna module to cover different frequency bands, and the directivities may be set in different directions by means of the multifunctional connecting rod.

[0033] Furthermore, the antenna module may be configured to be used as a micro cell base station.

[0034] Furthermore, the wireless unit may be installed on one of a supporting pole, a wall and a ceiling installed indoors.

[0035] Furthermore, the first fixing portion and the second fixing portion may be connected to the central body in a manner orthogonal to each other.

[0036] Furthermore, the multifunctional connecting rod may further include an anti-over-rotation locking portion, and the anti-over-rotation locking portion is used to limit the angle of the first ball joint portion or the second ball joint portion relative to the first fixing portion or the second fixing portion in the rotation direction.

[0037] Furthermore, the anti-over-rotation locking portion can be fixed in the internal space corresponding to the first fixing portion and the first ball joint portion or between the second fixing portion and the second ball joint portion, and a pair of locking protrusions that protrude in opposite directions in the internal space can be arranged in a manner that can be locked to a pair of locking plates that extend toward the center body side inside the first ball joint portion or the second ball joint portion.

[0038] Furthermore, when the antenna module is not tilting or turning, the rotational direction separation angles between the pair of locking plates and the pair of locking protrusions may be 90 degrees.

[0039] In the connector of a small base station antenna device in one embodiment of the present invention, the small base station antenna device includes: a wireless unit (RU; Radio Unit); at least one antenna module, which is arranged in a manner that can be tilted and turned relative to the wireless unit; and a multi-function link (Multi Function Link), which is used to intervene in the setting of each antenna module to the wireless unit. The connector of the small base station antenna device includes: a male connector, which is combined with the front end of a plurality of coaxial cables hidden and accommodated inside the multi-function link; and a female connector, including a coupling flange and a female terminal, the coupling flange having an inner side surface directly connected to the RF filter arranged inside the wireless unit, and the female terminal having an outer side surface connected to the male connector.

[0040] Wherein, in the female connector, a number of through-pin terminals corresponding to the number of the coaxial cables may be formed through-through to connect the inner side surface and the outer side surface.

[0041] Furthermore, the number of the multiple coaxial cables can be set to two for constructing a 2T2R transmission line between the wireless unit and the antenna module and one of four for constructing a 4T4R transmission line between the wireless unit and the antenna module, and terminal pins corresponding to the number of the multiple coaxial cables can be formed in the male connector, and terminal grooves into which the terminal pins are respectively inserted and connected can be correspondingly formed in the female connector.

[0042] Furthermore, in a state where the coupling flange is in contact with the RF filter, the female connector may be directly fastened to the RF filter using a plurality of screws.

[0043] Furthermore, the front end of each through-pin terminal of the female connector may be directly connected to a feed connector provided on the RF filter.

[0044] Furthermore, the male connector may further include a grounding washer. When four coaxial cables are provided, the grounding washers are provided in odd numbers at the center of the terminal pins corresponding to the coaxial cables.

[0045] Furthermore, when the multifunctional connecting rod includes: a central body; a first fixing part, which is connected between the antenna modules at the two ends of the central body; a second fixing part, which is connected between the wireless units at the two ends of the central body; a first ball joint part, a part of one of the two ends is accommodated and combined in the internal space of the first fixing part, and the other end of the two ends is connected to the antenna module, so that the antenna module is directionally adjusted by tilting or turning action; and a second ball joint part, a part of one of the two ends is accommodated and combined in the internal space of the second fixing part, and the other end of the two ends is connected to a cable receiving tube for intervening in the connection with the wireless unit, so that the antenna module can be further directionally adjusted, in the female connector, a number of through-pin terminals corresponding to the coaxial cable received in the cable receiving tube can be penetrated to connect the inner side surface and the outer side surface.

[0046] Effects of the Invention

[0047] According to the small base station antenna device and the connector thereof according to an embodiment of the present invention, the following multiple effects can be derived.

[0048] First, by using the multi-function link, the antenna module can be easily adjusted in directivity even in a small space, thereby making it easy to build a micro-cell base station.

[0049] Secondly, even when various cables for electrically connecting the wireless unit and the antenna module are not exposed to the outside, the directivity can be adjusted, thereby having an effect of preventing the aesthetics (outer appearance) from being degraded.

[0050] Thirdly, the multifunctional connecting rod can be centered on the central body and realize angle adjustment through ball joints at two locations at both ends, thereby having the effect of greatly ensuring the directional adjustment angle of multiple antenna modules to the wireless unit.

[0051] Fourth, the female connector arranged in the wireless unit directly contacts the feed connector of the RF filter so as to be connected to the male connector of the multi-functional connecting rod, and the through-pin terminals corresponding to the number of coaxial cables are electrically connected, thereby reducing the product size, expanding the space utilization, reducing the insertion loss and saving costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0052] Figure 11 is a perspective view showing the appearance of a conventional small base station antenna device.

[0053] Figure 2 1 is a perspective view showing the appearance of a small base station antenna device according to the present invention.

[0054] Figure 3 for Figure 2 Exploded stereogram of

[0055] Figure 4 for Figure 2 The main view and the cross-sectional view along the AA line,

[0056] Figure 5 for Figure 2 A side cross-sectional view of

[0057] Figure 6 To express Figure 2 A side view of the structure of the antenna module in a tilted state,

[0058] Figure 7 To express Figure 2 A perspective view of a structure of a wireless unit in different embodiments of the configuration,

[0059] Figure 8 This is a conceptual diagram showing the beamforming state based on CBRS and DoD two frequency bands in one antenna module.

[0060] Fig. 9 for Figure 8 A top view of the physical antenna device.

[0061] Fig.10a and Fig.10b Examples of dual-band antenna modules of different types are shown in the front view of various examples of support rod-bonded and wall-bonded types.

[0062] Fig.11 1 is a perspective view showing the appearance of a small base station antenna device (support pole combined type) according to a first embodiment of the present invention.

[0063] Fig.12 2 is a perspective view showing the appearance of a small base station antenna device (wall-mounted type) according to a second embodiment of the present invention.

[0064] Fig.13 1 is a perspective view showing the appearance of a small base station antenna device (ceiling mounted type) according to a third embodiment of the present invention.

[0065] Fig.14 and Fig.15 A short version of the multifunctional connecting rod for connecting the wireless unit and the antenna module ( Fig.14 (a) of the ) and the long type ( Fig.14(b) of the stereogram and its cut-away stereogram ( Fig.15 Part (a) of Fig.15 (b) of

[0066] Fig.16 is a cross-sectional view taken along line BB of FIG10 ,

[0067] Fig.17 To express Fig.14 and Fig.15 The long type ( Fig.14 (b) Exploded perspective view of the multifunctional connecting rod.

[0068] Fig.18a and Fig.18b FIG. 2 is an exploded perspective view showing an example of a wireless unit equipped with a connector according to an embodiment of the present invention.

[0069] Fig.19 The present invention is a perspective view of a wireless unit provided in a connector structure of a small base station antenna device as an embodiment of the present invention, showing a modified example of a wireless unit side female connector.

[0070] Fig. 20 To indicate the male connector pair of the multi-function link Fig.18a and Fig.18b A partially cutaway perspective view of the connection state of the female connector on the wireless unit side,

[0071] Fig.21 is a perspective view showing a small base station antenna device according to a modified example in which a multifunctional link is applied.

[0072] Fig.22a and Figure 22b 18 is an exploded perspective view of the front and rear sides.

[0073] Fig.23 For Fig.21 An exploded perspective view of a multifunctional connecting rod according to a modified example of the present invention.

[0074] Fig.24 To express Fig.21 A cross-sectional view of the inner and outer joints of the multifunctional connecting rod of the modified example,

[0075] Fig.25 for Fig.21 A cross-sectional view of a multifunctional connecting rod of a modified example,

[0076] Fig.26 To express Fig.21 A cross-sectional view of a male connector of a multifunctional connecting rod according to a modified example,

[0077] Fig. 27 for Fig.21 An exploded perspective view of a multifunctional connecting rod according to a modified example of

[0078] Fig.28 for Fig. 27 A cutaway stereogram of

[0079] Fig.29 for Fig. 27 A cross-sectional view of

[0080] Fig.30 To express Figure 27 to Figure 29 The cutaway perspective view of the anti-over-rotation locking portion referred to,

[0081] Fig.31 To express Fig.30 The internal front view of the operating state of the anti-over-rotation locking part,

[0082] Fig.32 To express Fig.21 A cross-sectional view, a cutaway stereoscopic view and a partially enlarged view of a cable receiving tube in a structure of a multifunctional connecting rod according to a modified example of the present invention;

[0083] Fig.33 For illustration Fig.21 A projected top view of the effect of the multifunctional connecting rod of the modified example.

[0084] Description of Reference Numerals

[0085] 100: Base station antenna device 110: Antenna module

[0086] 111: Antenna housing 113: Radome

[0087] 115: Antenna board 117: Patch component

[0088] 118: Antenna subarray 119: Radiating element module

[0089] 120: Wireless unit 121: Setting panel part

[0090] 122: rear housing 123: front housing

[0091] 150: Female connector 151: Female terminal block

[0092] 152: Guide groove 153: Terminal groove

[0093] 154: Ring receiving groove 155: Prevent foreign matter from entering the ring

[0094] 200: Multifunctional connecting rod 205: Center body

[0095] 200': Multifunctional connecting rod of modified example 210: Fixed part

[0096] 210A: first fixing portion 210B: second fixing portion

[0097] 217: Assembly screw 220: Ball joint

[0098] 220A: first ball joint portion 220B: second ball joint portion

[0099] 225: movable lock part 230: cable storage tube

[0100] 240: Coaxial cable 250: Male connector

[0101] 251: Male terminal 252: Guide pin

[0102] 253: Terminal pin 254: Guide ring

[0103] 256: Fixing nut 257: C-ring DETAILED DESCRIPTION

[0104] Hereinafter, a small base station antenna device and a connector thereof according to various embodiments of the present invention will be described in detail with reference to the accompanying drawings.

[0105] It should be noted that, in the process of assigning reference numerals to the structural elements of each drawing, the same reference numerals should be assigned to the same structural elements as much as possible even if they are shown in different drawings. In addition, in the process of describing the embodiments of the present invention, if it is determined that the detailed description of the relevant known structure or function will hinder the understanding of the embodiments of the present invention, the detailed description of this will be omitted.

[0106] In the process of describing the structural elements of the embodiments of the present invention, the terms such as first, second, A, B, (a), (b) can be used. Such terms are only used to distinguish the structural elements from other structural elements, and the nature, order or sequence of the corresponding structural elements will not be limited by these terms. As long as they are not defined in a different way, all terms used herein, including technical terms or scientific terms, have the same meaning as the terms commonly understood by ordinary technicians in the technical field to which the present invention belongs. The commonly used terms that are the same as those defined in the dictionary should be interpreted as having a meaning consistent with the meaning of the context of the relevant technology, and will not be interpreted as an overly ideal or formal meaning as long as they are not clearly defined in this application.

[0107] Figure 2 1 is a perspective view showing the appearance of a small base station antenna device according to the present invention. Figure 3 for Figure 2 Exploded stereogram of Figure 4 for Figure 2 The main view and the cross-sectional view along the AA line, Figure 5 for Figure 2 A side cross-sectional view of Figure 6 To express Figure 2 A side view of the structure of the antenna module in a tilted state.

[0108] like Figures 2 to 5 As shown, a small base station antenna device 100 according to an embodiment of the present invention includes a wireless unit 120 and an antenna module 110 installed at a specified location. The specified location where the small base station antenna device 100 of the present invention is installed means a public place, a densely populated area, a large shopping mall, or an airport building, etc., which performs the function of a microcell base station. As described later, it can be a support pole combined type (refer to the following description). Fig.11 ), wall-mounted type (see below for Fig.12 ) and ceiling-mounted type (see below Fig.13 ) and other structures suitable for installation inside a building (indoors).

[0109] The antenna module 110 may refer to an antenna device having at least one frequency band. Furthermore, the radio unit (RU; Radio Unit) 120 means a device that is connected to antennas of different frequency bands provided in the antenna module 110 and performs transmission / reception between the antenna and the base station. An example of the radio unit 120 may be an RRH (Remote Radio Head) that remotely separates a part of the radio unit in the base station device. The radio unit 120 is a relay device that receives a weakened signal between a base station and a mobile communication terminal in a mobile communication system, amplifies or retransmits it, or performs functions such as shaping a distorted waveform and readjusting the timing.

[0110] like Figure 3 As shown, a small base station antenna device 100 according to an embodiment of the present invention first installs a wireless unit 120 on a structure such as a support pole, wall or ceiling indoors (in a house), and the antenna module 110 can be installed on the front surface of the wireless unit 120 in a tiltable and rotatable manner via the antenna clamping unit 200 described later.

[0111] However, if Figures 2 to 5 As shown, the wireless unit 120 does not have to be installed on the indoor structure (support pole, wall and ceiling) first, but as described later Figures 11 to 13 As shown, the antenna module 110 may be first provided in the wireless unit 120 and then installed in the structure in each room.

[0112] like Figure 4 As shown, the antenna module 110 may include: an antenna housing 111 ; and a radome 113 , which is provided in a manner of covering a front surface of the antenna housing 111 and forming a predetermined space between the radome 113 and the antenna housing 111 .

[0113] An antenna board 115 in the form of a printed circuit board may be provided in a predetermined space of the antenna housing 111, and a plurality of radiating elements may be installed and configured on the front surface of the antenna board 115. The radiating elements installed and configured on the antenna board 115 may vary depending on the type of antenna. In one embodiment of the present invention, a patch element (patch element) 117 is used as an example for description.

[0114] On the other hand, Figures 2 to 5 As shown, the base station antenna device 100 of the present invention may further include a multifunctional connecting rod 200 , and the multifunctional connecting rod 200 is involved in the connection with the front surface of the wireless unit 120 .

[0115] In more detail, Figures 2 to 5 As shown, the wireless unit 120 may include a rear housing 122, which is connected to the indoor support rod P, the wall W, and the ceiling C via a panel portion (see Fig.11 and a front housing 123, forming a predetermined space between the rear housing 122, and a plurality of internal components may be provided in the predetermined space.

[0116] Although not shown in the figure, the internal components provided in the wireless unit 120 may include a main board (see below). Fig.18a and Fig.18b front panel 126A), RF filter (see below) Fig.18a and Fig.18b denoted by the reference numeral “130”), two power amplifying units (PAU: Power Amplifing Unit) and a power supply unit (PSU: Power Supplying Unit).

[0117] In the wireless unit 120, a plurality of heat sink pins 125 may be integrally formed on the front surface of the front housing 123, so that the heat generated in the predetermined space can be dissipated to the outside through the plurality of heat sink pins 125. In the small base station antenna device 100 of one embodiment of the present invention, it should be noted in advance that although the description is limited to the mode in which the plurality of heat sink pins 125 are formed only on the front housing 123 in the wireless unit 120, it is not limited thereto, and as described in another embodiment of the present invention described later, the plurality of heat sink pins 125 may also be formed on the rear housing 122.

[0118] On the other hand, a plurality of grooves 127 may be provided on the front surface of the front housing 123, where a portion of the radiator pins 125 is cut out to form a quadrilateral shape, and the multifunctional link 200 may be coupled to the grooves 127 by means of a plurality of assembly screws 217. However, in order to set the multifunctional link 200, it is not necessary to provide the grooves 127 on the front surface of the front housing 123, where a portion of the radiator pins 125 is cut out to form a quadrilateral shape, but as described later, Figures 11 to 13 As shown in the referenced embodiments (100A, 100B, 100C), the multifunctional link 200 can be connected to the side portion (including the concepts of the upper side, lower side, left side and right side) of the wireless unit 120. When the installation position of the multifunctional link 200 relative to the wireless unit 120 is changed, it is inevitable that the shape of the RF filter installed inside the wireless unit 120 is changed. This will be described in more detail in the following content.

[0119] Among them, Figures 3 to 5 As shown, the multifunctional connecting rod 200 may include: a fixing portion 210, one side of which is configured to be a partially open cylindrical shape, and the other side allows the cable housing tube 230 described later to be inserted or is directly connected to the wireless unit 120 in the absence of the cable housing tube 230; and a ball joint portion 220, a portion of one end of which is inserted into one side of the opening of the fixing portion 210, and the other end is combined with the antenna module 110.

[0120] Will explain Figures 11 to 13 After the first to third embodiments, the following content will more specifically describe an embodiment in which the cable housing tube 230 is inserted and the fixing portion 210 is connected to the wireless unit 120. In particular, the multifunctional connecting rod 200 including the cable housing tube 230 basically performs the function of inserting the connection of the antenna module 110 to the wireless unit 120. In this regard, the cable housing tube 230 is preferably made of a rigid material that can partially perform the function of the support rod.

[0121] The ball joint 220 accommodated in the fixing portion 210 may be roughly in the shape of a ball with a portion of one end opened, and is locked by the end of the opening of the fixing portion 210 to prevent it from escaping to the outside (especially, forward). The opening of one end of the ball joint 220 is to achieve the through-setting of a plurality of coaxial cables 240 described later.

[0122] Furthermore, as for the ball joint portion 220, the interior is empty to the part provided at the fixing portion 210 and the part provided at the antenna module 110, and is connected to the internal space of the fixing portion 210, and a coaxial cable 240 for performing electrical connection between the wireless unit 120 and the antenna module 110 can be provided in the internal space connecting the fixing portion 210 and the ball joint portion 220.

[0123] The coaxial cable 240 is preferably made of a flexible material so that the antenna module 110 can perform the tilting and turning actions described below and at least will not interfere with the movement of the ball joint 220 to the fixing portion 210 .

[0124] An antenna side male connector and a wireless unit side male connector may be provided at one end and the other end of the coaxial cable 240, respectively, and an antenna side female connector and a wireless unit side female connector connected to the antenna side connector or the wireless unit side connector may be provided at the back of the antenna module and the outer side of the wireless unit, respectively. The specific description of this will be described in more detail in the following content.

[0125] As described above, the small base station antenna device 100 of the present invention can prevent the appearance from being deteriorated because the plurality of coaxial cables 240 that electrically connect the wireless unit 120 and the antenna module 110 are hidden from the outside without being entangled.

[0126] The ball joint 220 can perform tilting and turning movements in a manner that it can maintain a predetermined angle in four directions including the up-down or left-right directions relative to the fixing part 210. The term tilting movement is a concept including all movements of the upper and lower ends of the antenna module 110 swinging in the front-back direction, and the term turning movement is a concept including all movements of the left and right ends of the antenna module 110 swinging in the left-right direction. In the small base station antenna device 100 of an embodiment of the present invention, the ball joint 220 can be set in a manner that the tilting movement and the turning movement are performed simultaneously or sequentially, rather than performing only one of the tilting movement and the turning movement.

[0127] In more detail, the ball joint 220 can be tilted and turned at a predetermined angle in four directions including up and down or left and right directions with any reference point of one end portion received in the fixing portion 210 as the center. As the ball joint 220 is tilted and turned, the antenna module 110 combined therewith can also be tilted and turned, and the antenna module 110 can be directional-adjusted in the direction required by the designer.

[0128] The ball joint 220 can form some friction with the inner surface of the fixing part 210 and perform tilting and turning movements. To this end, a friction pad (or friction component, not shown) that forms a mutually predetermined friction force can be provided on the inner surface of the fixing part 210 or a part of the inserted outer surface of the ball joint 220.

[0129] On the other hand, Figure 5As shown, the antenna clamping unit 200 may further include a movable locking portion 225, which fixes the ball joint portion 220 to the fixing portion 210 at a movable fixing point after the ball joint portion 220 tilts and turns the fixing portion 210 at a specified angle.

[0130] As long as the structure is such that the ball joint portion 220 is fixed to the fixed portion 210, any mechanism can be used for the movable locking portion 225. For example, the outer side of the fixed portion 210 that accommodates the ball joint portion 220 is penetrated, and locking is achieved by means of an unillustrated fixing bolt that interferes with a portion of the outer peripheral surface of the ball joint portion 220.

[0131] As described above, according to the small base station antenna device 100 of the present invention, the multifunctional connecting rod 200 is used to suppress the external exposure of multiple coaxial cables 240 connecting the wireless unit 120 and the antenna module 110, thereby preventing the aesthetics from being reduced. In addition, only the antenna module 110 with a relatively small size is allowed to perform tilting and turning movements, and the wireless unit 120 with a relatively large size cannot perform tilting and turning movements, thereby maximizing the use of space.

[0132] Furthermore, according to the small base station antenna device 100 of the present invention, Figure 6 As shown, the following advantages can be provided: the front surface ( Figure 6 Only the tilting action is shown in the figure), and the directionality can be adjusted to match a densely populated or multiple required spaces regardless of the location in the indoor space or outdoor space.

[0133] Figure 7 To express Figure 2 A perspective view of a structure of a wireless unit in different embodiments of the configuration, Figure 8 This is a conceptual diagram showing the beamforming state based on CBRS and DoD two frequency bands in one antenna module. Fig. 9 for Figure 8 A top view of the physical antenna device. Fig.10a and Fig.10b The present invention is a front view showing various examples of dual-band antenna modules of different types, including a support rod-attached type and a wall-attached type.

[0134] like Figure 7 As shown, the antenna module 110 is different only in the configuration of the patch antenna element or the configuration of the wireless unit 120. Figures 2 to 6 Referring to the wireless unit 120, Figure 7Although the referenced wireless unit 120 is relatively short in width in the left-right direction, it can be relatively longer in length in the up-down direction. At this time, preferably, the antenna module 110 is disposed at an appropriate position considering the weight of the antenna module 110 and the tilting and turning movements.

[0135] However, in the small base station antenna apparatus 100 of the present invention, not only the configuration of the wireless unit 120 is applied differently.

[0136] That is, Figure 8 and Fig. 9 As shown, a radiation element module 119 in which a plurality of patch elements 117 for forming a beam forming in a specific frequency band are arranged to form a plurality of antenna sub-arrays 118 may be provided on the front surface of the antenna module 110 .

[0137] The plurality of radiation element modules 119 can be used as a form of constructing a frequency band corresponding to a microcell base station, and can be embodied as an antenna board 115 in an antenna module 110. Figure 8 and Fig. 9 As shown, it can also be embodied in a dual-band form in which one antenna board 115 for macro use is divided into frequency bands for covering DoD (Depart of Defense) and CBRS (Citizens Broadband Radio Services).

[0138] In more detail, Figure 8 and Fig. 9 As shown, multiple radiating element modules 119 can be arranged on the upper side of the front surface of the macro antenna board 115 to form multiple antenna subarrays 118 based on multiple patch elements 117, so that a DoD channel in the 3450-3550 MHz band in the dual-band can be realized to achieve a gain of 17.5 dBi, and multiple antenna subarrays 118 based on multiple patch elements 117 can be arranged on the lower side of the front surface of the macro antenna board 115 to form multiple antenna subarrays 118 based on multiple patch elements 117 to achieve a gain of 15.5 dBi.

[0139] Like this, Figure 8 As shown, multiple radiation element modules 119 constructed in a manner capable of covering dual frequency bands can form antenna beamforming in a manner that the H-Beam width in the DoD and CBRS channels both have values ​​of 55° to 90°, and can form different antenna beamforming in a manner that the V-Beam width in the DoD channel has a value of 7.5° and the CBRS channel has a value of 14.6°.

[0140] That is, as described above, the antenna module 110 can be implemented in a single antenna board 115 in a manner of forming an antenna beam that covers a macro frequency band and a micro cell frequency band. Furthermore, even when the directivity of the antenna module 110 is adjusted in the same manner, the UL (Up Link) Coverage can be maximized by separating the TRx of different bands and the antenna subarray 118.

[0141] However, it is not necessary to arrange the antenna subarrays 118 in one antenna board 115 in such a manner as to cover dual frequency bands, as described later. Fig.10a and Fig.10b As shown, of course, two or more antenna modules 110A, 110B covering the inherent frequency band can be respectively set on a wireless unit 120 via a multi-functional connecting rod 200, and the multi-functional connecting rod 200 can be used to adjust the direction of each antenna module 110A, 110B in the direction with a stronger coverage range requirement value, thereby achieving this goal.

[0142] If, for example, it is set as a support rod combination type Fig.10a (a) and is configured as a wall-connected type Fig.10b As shown in part (a) of FIG. 1 , the antenna modules 110A and 110B configured as two dual-band antenna modules can be directional-adjusted in the same direction (front), and the antenna modules 110A and 110B configured as a support rod-combined antenna module can be directional-adjusted in the same direction (front). Fig.10a (b) and is configured as a wall-connected type Fig.10b As shown in part (b), the antenna modules 110A and 110B can be directional-adjusted in opposite directions, and as shown in part (c) of 10a which is configured as a support rod-combined type and part (c) of 10a which is configured as a wall-combined type Fig.10b As shown in part (c) of the embodiment, the directionality of the antenna module 110A of the antenna modules 110A and 110B can be adjusted toward the front, and the directionality of the other antenna module 110B can be adjusted toward the side.

[0143] At this time, each radiation element module 119 of the antenna modules 110A and 110B is set to a configuration suitable for microcell base stations rather than macroscopic use, and is respectively configured to achieve a maximum gain rate of one of 15dBi, 13dBi and 11dBi. Directional adjustment is performed in the desired direction, thereby maximizing the effect of the microcell base station, which is a matter of course.

[0144] Fig.11 1 is a perspective view showing the appearance of a small base station antenna device (support pole combined type) according to a first embodiment of the present invention. Fig.12 2 is a perspective view showing the appearance of a small base station antenna device (wall-mounted type) according to a second embodiment of the present invention. Fig.131 is a perspective view showing the appearance of a small base station antenna device (ceiling mounted type) according to a third embodiment of the present invention. Fig.14 and Fig.15 A short version of the multifunctional connecting rod for connecting the wireless unit and the antenna module ( Fig.14 (a) of the ) and the long type ( Fig.14 (b) of the stereogram and its cut-away stereogram ( Fig.15 Part (a) of Fig.15 (b) of Fig.16 is a cross-sectional view taken along line BB of FIG10 , Fig.17 To express Fig.14 and Fig.15 The long type ( Fig.14 (b) Part) Exploded perspective view of the multi-function connecting rod.

[0145] like Figures 11 to 13 As shown, the small base station antenna device 100 of the present invention can fix or hide the rear shell 122 of the wireless unit 120 in one of the support poles P, wall W and ceiling C installed indoors via the setting panel part 121, and in the wireless unit 120, at least one (two in this embodiment) or more antenna modules 110A, 110B are combined in a manner that can be tilted or turned via the multi-functional connecting rod 200.

[0146] Reference Fig.11 A support pole P for setting up the base station antenna device 100 of this embodiment can be installed indoors in large buildings, etc. The small base station antenna device 100A of the first embodiment of the present invention can be configured to be combined with the support pole (Pole) P, and the rear shell 122 corresponding to the back part of the wireless unit 120 can be fixed in a preset manner with a directional support pole.

[0147] And, refer to Fig.12 The small base station antenna device 100B of the second embodiment of the present invention can be configured to be a wall-mounted type that is equivalent to a wall (Wall) W in a large building or the like, and the rear housing 122 corresponding to the back of the wireless unit 120 can be fixed in a close-fitting manner.

[0148] At the same time, refer to Fig.13 The small base station antenna device 100C of the third embodiment of the present invention can be configured to be mounted on a ceiling (C, Ceiling) in a large building or other indoor space, and the rear housing 122 corresponding to the back portion of the wireless unit 120 is fixed in a close fit, or the wireless unit 120 is fixed to the interior of the ceiling C in a hidden manner.

[0149] The wireless unit 120 and the antenna modules 110A and 110B can be appropriately used according to different surrounding environments such as the location where they are installed and whether there is interference with surrounding structures for adjusting the directionality of the antenna modules 110A and 110B. Fig.14 and Fig.15 The multifunctional link 200 of one of the short multifunctional link (hereinafter referred to as “short link 200S”) or the long multifunctional link (hereinafter referred to as “long link 200L”) is referenced to realize the electrical signal connection.

[0150] like Fig.14 , Fig.15 Part (a) and Fig.15 As shown in (b), the short link 200S and the long link 200L can be set to have the same configuration in structure and function, and can be divided according to the relative length of the cable storage tube 230 that stores a plurality of coaxial cables 240. Generally, the length of the cable storage tube 230 means the distance between the connection part with the wireless unit 120 and the fixed part 210 of the multifunctional link 200. When the distance is long, it is preferred to have a long link 200L, and when the distance is short, it is preferred to have a short link 200S.

[0151] Reference Figures 14 to 17 In the small base station antenna device 100 of the embodiment of the present invention, the multifunctional connecting rod 200 may include the above-mentioned fixing portion 210, the ball joint portion 220, the cable receiving tube 230, and a plurality of coaxial cables 240.

[0152] At the same time, in the multi-functional connecting rod 200, as a component arranged at each end of the multiple coaxial cables 240, an antenna side positive connector 250, 250A for electrically connecting to the antenna module 110 can be provided at one end of the multiple coaxial cables 240, and a wireless unit side positive connector 250, 250B for electrically connecting to the wireless unit 120 can be provided at the other end of the multiple coaxial cables 240.

[0153] In the antenna side male connector 250A, as Fig.15 As shown, the antenna side end of the ball joint 220 may be provided with a male guide pin 252 and a terminal pin 253 in a bare manner. In the wireless unit side male connector 250B, as shown in FIG. Fig.15 As shown, a male guide pin 252 and a terminal pin 253 described below may be provided in an exposed manner at the end of the cable housing tube 230 .

[0154] Hereinafter, the antenna side male connector 250A and the wireless unit side male connector 250B differ only in their installation positions, and have the same basic structure, and therefore will be simply referred to as "male connector 250" for description.

[0155] At the same time, the antenna module 110 and the wireless unit 120 may be provided with antenna-side female connectors 150 , 150A and wireless unit-side female connectors 150 , 150B for connecting to the male connector 250 , respectively.

[0156] like Figures 11 to 13 and Fig.15 As shown, in the antenna side female connector 150A, the female guide groove 152 and the terminal groove 153 described later can be set in a naked manner on the back side of the antenna module 110, and in the wireless unit side female connector 150B, the female guide groove 152 and the terminal groove 153 described later can be set in a naked manner on the side portion of the wireless unit 120.

[0157] Hereinafter, the antenna side female connector 150A and the wireless unit side female connector 150B differ only in their installation positions, and their basic structures are the same, so they will be simply referred to as "female connector 150" for description.

[0158] Two or four coaxial cables 240 are arranged to transmit electrical signals respectively and are accommodated in the cable accommodation tube 230, and one end and the other end can be connected to the male connector 250 respectively. In the following, for the sake of convenience, it is assumed that four (4) coaxial cables 240 are arranged.

[0159] The male connector 250 may further include a male terminal 251, which is combined with one end of the four coaxial cables 240 and is respectively connected to multiple terminal pins 253. The female connector 150 may further include a female terminal 151 that is processed to form the above-mentioned guide groove 152 and terminal groove 153.

[0160] The four guide pins 252 are arranged to protrude from the male terminal 251 at intervals of 90 degrees, and the four terminal pins 253 can be arranged to protrude at intervals of 90 degrees within a range not overlapping with the four guide pins 252 .

[0161] In addition, four guide grooves 152 and four terminal grooves 153 can be configured at corresponding positions in the female terminal 151, and the four guide pins 252 of the male terminal 251 can be respectively inserted into the four guide grooves 152 and accommodated, and the four terminal pins 253 of the male terminal 251 can be inserted into the four terminal grooves 153 and connected.

[0162] Meanwhile, a guide ring 254 may be provided on the male terminal 251, and the guide ring 254 protects the four guide pins 252 and the four terminal pins 253 while protruding in a ring shape toward the female connector 150. In addition, a ring receiving groove 154 may be provided on the female terminal 151, and the guide ring 254 of the male terminal 251 is inserted into the ring receiving groove 154. Among them, a foreign matter inflow prevention ring 155 for preventing the inflow of foreign matter from the outside may be provided inside the ring receiving groove 154.

[0163] The four guide pins 252, guide ring 254 and four terminal pins 253 provided on the male connector 250 can be respectively inserted into the four guide grooves 152, ring receiving groove 154 and four terminal grooves 153 provided on the female connector 150, and can realize the electrical connection of the antenna module 110 and the wireless unit 120 of the multi-function connecting rod 200.

[0164] On the other hand, Figures 15 to 17 As shown, the multi-function link 200 may further include a fixing nut 256 , which provides a prescribed maintaining force to maintain the electrical connection between the male connector 250 and the female connector 150 .

[0165] An internal thread 256a can be formed on the inner circumference of the fixing nut 256, and the internal thread 256a of the fixing nut 256 is fastened to the external thread 156a formed on the outer circumference of the nut fastening end 156 formed on the outer circumference of the female terminal 151 of the female connector 150, thereby forming the above-mentioned specified retaining force.

[0166] A C-ring 257 may be inserted into the end of the male terminal 251 to limit the tightening force of the fixing nut 256. The C-ring 257 may be inserted into a C-ring installation groove 257h formed at the end of the cable receiving tube 230 in one direction.

[0167] As such, the small base station antenna device 100 of the embodiment of the present invention can realize the electrical connection between the wireless unit 120 and multiple antenna modules 110 via the multifunctional connecting rod 200, and enable the antenna module 110 to be tilted or turned, providing the benefit of being able to perform the setting operation on site more simply and conveniently.

[0168] Furthermore, the male connector 250 and the female connector 150 can be made symmetrical to each other, so that the four terminal pins 253 and the four terminal slots 153 can be connected in any direction, thereby providing the benefit of further improving the directional design diversity of the antenna module 110.

[0169] Fig.18a and Fig.18b FIG. 2 is an exploded perspective view showing an example of a wireless unit equipped with a connector according to an embodiment of the present invention. Fig.19The present invention is a perspective view of a wireless unit provided in a connector structure of a small base station antenna device as an embodiment of the present invention, showing a modified example of a wireless unit side female connector. Fig. 20 To express the Fig.18a and Fig.18b A partially cutaway perspective view of the male connector of the multifunctional connecting rod of the wireless unit side female connector connected to the state.

[0170] like Fig.18a , Fig.18b and Fig.19 As shown, the connectors 150', 250 of the small base station antenna device of one embodiment of the present invention include: a male connector 250, which is combined with the front end of a plurality of coaxial cables 240 hidden inside the multi-function connecting rod 200; and a modified female connector 150', which is directly connected to the RF filter 130 arranged inside the wireless unit 120.

[0171] Among them, the female connector 150' of the modified example includes: a coupling flange 157 formed on one side of the female connector 150' so as to be coupled with the RF filter 130 provided inside the installation space of the wireless unit 120; and a female terminal 151 protruding from the coupling flange 157 to the other side toward the male connector 250.

[0172] A nut fastening end 156 may be formed on an outer circumferential surface of the female terminal 151 , and an outer thread 156 a for fastening to the inner thread 256 a of the fixing nut 256 may be formed on an outer circumferential surface of the nut fastening end 156 .

[0173] A ring receiving groove 154 in the form of a groove for inserting a guide ring 254 formed in the male connector 250 may be provided between the nut fastening end 156 and the center portion of the female terminal 151 .

[0174] Among them, four terminal grooves 153 can be formed in the central part of the female terminal 151 which is physically divided by the ring receiving groove 154 and the nut fastening end 156, and the four terminal pins 253 of the male connector 250 electrically connected to the four terminals of the coaxial cable 240 are inserted into the four terminal grooves 153.

[0175] Furthermore, in addition to the four terminal pins 253, the male connector 250 may be provided with two guide pins 252 protruding toward the female connector 150' of the modified example, and the female connector 150' of the modified example may be formed with guide grooves 152 for inserting and guiding the guide pins 252 of the male connector 250.

[0176] Preferably, the two guide grooves 152 are spaced 180 degrees apart from the center of the outer side surface of the female terminal 151 and are formed at a position not overlapping with the four terminal grooves 153 , and can be formed in a form that partially overlaps with the above-mentioned ring receiving groove 154 .

[0177] As reference Figures 11 to 17 The advantages are as follows: when four guide pins 252 and four guide slots 152 are formed so that the male connector 250 and the female connector 150 correspond to the four terminal pins 253 and the four terminal slots 153, respectively, the connection can be achieved as long as they are matched with each other at intervals of 90 degrees. However, when the same male connector 250 and female connector 150 are used, as long as two coaxial cables 240 are replaced instead of four, it will be difficult to guide the two terminal pins 253 and the two terminal slots 153 to match each other at the correct position, and there is a disadvantage of limited versatility in this regard. In the connectors 150', 250 of the small base station antenna device of an embodiment of the present invention, even when four coaxial cables 240 can be used, they are designed to be two, so that the guide pins 252 and the guide slots 152 are spaced 180 degrees apart.

[0178] At the same time, if Fig.18a , Fig.18b and Fig. 20 As shown, in the female connector 150' of the modified example, four through-pin terminals 165 for connecting respectively independent electrical signals to the RF filter 130 through four terminal pins 253 can be located at positions corresponding to the four terminal slots 153 so as to pass through from the outer side surface of the female terminal 151 to the outer side surface of the coupling flange 157.

[0179] A plurality of one-side through holes 156h penetrated by four through-pin terminals 165 may be formed on the outer side surface of the female terminal 151, and a plurality of other-side through holes 157h penetrated by four through-pin terminals 165 may be formed on the outer side surface of the coupling flange 157. The one-side through holes 156h and the other-side through holes 157h may be formed in a manner of being interconnected.

[0180] Among them, Fig.19 As shown, a pin-shaped insulator 166 may be provided around each outer peripheral surface of the four through-pin terminals 165 to prevent electrical short circuit.

[0181] On the other hand, the female connector 150' of the modified example may also include: a filter side gasket 159, which is inserted and clamped in a gasket groove 159h formed between the boundary of the coupling flange 157 and the female terminal 151; and a first external gasket 161 and a second external gasket 162, which are clamped on the outer peripheral surface of the female terminal 151, supported on the outer side surface of the wireless unit 120, and are linked when the external fastening nut 160 is tightened.

[0182] In reference Figures 11 to 17 In the case of the wireless unit side female connector 150 described above, it is limited to being installed only on the outside of the wireless unit 120 and performing the physical connection function of connecting the male connector 250 of the multi-function link 200. This is because, in order to substantially complete the electrical connection between the RF filter 130 of the wireless unit 120 and the antenna module 110, an internal connector (not shown) for electrically connecting the wireless unit side female connector 150 and the RF filter 130 needs to be provided inside the wireless unit 120.

[0183] On the contrary, in the female connector 150' of the modified example, the coupling flange 157 side is stably fixed directly to the connection part (feed connector) 131 provided on the RF filter 130 by means of multiple screws 158, and the through pin terminals 165 corresponding to the number of the above-mentioned coaxial cables 140 are configured in a manner that passes through the inner side surface of the coupling flange 157 and the outer side surface of the female terminal 151, so that the electrical connection between the RF filter 130 and the antenna module 110 can be directly completed at the moment of connecting the male connector 250 of the multi-function connecting rod 200.

[0184] If, such as Fig. 20 As shown, in the female connector 150' of the modified example, the outer side surface (one side surface) of the flange 157 is stably connected by means of multiple screws 158 so as to be in direct contact with the connecting portion (feed connector) 131 arranged on the side of the RF filter 130. Thereafter, in a state where the female terminal 151 is exposed to the outside through the setting hole 128 formed in the wireless unit 120, the first external gasket 161 and the second external gasket 162 are clamped in, and then fixed to the wireless unit 120 by using the external fastening nut 160. In the female terminal 151 exposed to the outside, each terminal pin 253 of the male connector 250 of the multi-function connecting rod 200 is electrically connected to the through pin terminal 165 exposed through the terminal groove 153, so that the RF filter 130 can be directly fed back.

[0185] At this time, the through pin terminal 165 is connected to the male connector 250 of the multi-function link 200 in a state of being inserted and fastened in advance by respectively energizing the through pin terminal coupling hole 131h formed in the feed connector 131 provided on the RF filter 130 side.

[0186] The female connector 150' according to this modified example has the following advantages: as the design is changed to directly achieve electrical connection with the RF filter 130 inside the wireless unit 120, there is no need to further set up additional cable structures that were previously used for such connection, or there is no need to further design additional air lines and other structures that must be set up when constructing the feed connector of the RF filter 130 for impedance mismatching.

[0187] However, in the case of the female connector 150' of the modified example, the wireless unit 120 is directly electrically connected to the RF filter 130, and a stable connection is required. In this regard, the shape design of the connection part (feed connector) 131 of the conventional RF filter 130 should also be changed to match this.

[0188] In more detail, refer to Figures 11 to 17 The RF filter 130 inside the wireless unit 120 of the wireless unit side female connector 150 described has the following advantages: in the case of the existing MMR (Massive MIMO Radio) which is a product stacked in the order of "main board-RF filter-antenna radiating element", even if it is applied intactly to the structure in which feed connectors are respectively provided at the rear and front parts of the filter body (not shown), electrical connection can be easily achieved using the above-mentioned cable structure (internal connector, not shown) without additionally changing the shape of the RF filter 130.

[0189] However, as for the female connector 150' of the modified example, as described above, it is necessary to directly connect the through pin terminal 165 to the RF filter 130. In this regard, it is necessary to change the position of the feed connector 131 of the front part of the RF filter 130. However, in one embodiment of the present invention, as described later, the position design of the internal components of the wireless unit 120 is changed, including not only the change of the position of the feed connector 131 of the front part of the RF filter 130, but also the change of the position of the feed connector 131 of the rear part (see Fig.19 a) has changed its position.

[0190] Reference Fig.18a and Fig.18b This is described in more detail as follows: With respect to the wireless unit 120 , a predetermined space for various internal components described below may be formed between the rear housing 122 and the front housing 123 , and a plurality of heat sink pins 125 may be integrally formed on the front surface of the front housing 123 .

[0191] A plurality of heat sink pins 125 for smoothly dissipating the front surface of the front shell 123 may be formed in the setting space of the wireless unit 120, and the front panel 126A may be in close contact with the back surface of the front shell 123, so that a plurality of heating elements (for example, FPGA elements or PA elements, etc.) installed on the front surface of the front panel 126A may be configured in direct surface thermal contact.

[0192] The front panel 126A may be configured as an integrated single panel having the functions of an existing digital panel and an AMP panel.

[0193] On the other hand, a shielding plate 127 may be provided between the front plate 126A and the RF filter 130 to block the heat flow or electromagnetic wave flow therebetween.

[0194] A rear plate 126B may be disposed below the RF filter 130, and electronic components with negligible heat dissipation may be mounted on the rear plate 126B. The rear plate 126B may be a surge substrate.

[0195] In the case of an antenna device composed of the existing MMR, since the antenna module (radiating element module) is arranged at the front, a main board configured and designed with heat dissipation as the top priority cannot be set close to the front shell 123 side. However, as the antenna module 110 can be separated by the multi-function link 200 and the internal components are arranged by the structure as described above, in the case of the wireless unit 120 in this embodiment, the electrical connection structure between the RF filter 130 and the antenna module 110 via the multi-function link 200 is also changed in design.

[0196] When the wireless unit 120 uses the female connector 150' of the modified example described above, there is no need to set up an additional internal connector, which can not only reduce the size and installation space of the wireless unit 120, but also achieve the benefit of cost saving. In addition, the RF filter 130 can be directly electrically connected by passing through the pin terminal 165, so the insertion loss caused by the additional cable-shaped internal connector or air line structure in the past can be greatly reduced, thereby improving the performance of the antenna device, which is reasonable.

[0197] Fig.21 is a perspective view showing a small base station antenna device according to a modified example in which a multifunctional link is applied. Fig.22a and Figure 22b for Fig.21 Exploded perspective view of the front and rear sides of Fig.23 For Fig.21 An exploded perspective view of a multifunctional connecting rod of a modified example.

[0198] Below, it should be noted that in reference Figure 21 to Figure 23 In the modified example of the multifunctional link 200', although the example in which two coaxial cables 240-1 are provided is shown and described, the invention is not limited thereto and does not exclude the example in which four coaxial cables 240-1 are provided.

[0199] like Figure 21 to Figure 23 As shown, the small base station antenna device 100 according to the embodiment of the present invention may include a multifunctional connecting rod 200 ′ of a modified example.

[0200] Different from reference Figures 5 to 7 as well as Figures 11 to 17 The multifunctional link 200 (hereinafter referred to as the "ordinary multifunctional link") has been described. In the modified multifunctional link 200', the fixing portion 210 can be separated into two fixing portions 210A and 210B, and a central body 205 is arranged between the two fixing portions 210A and 210B. The two fixing portions 210A and 210B can be combined in an orthogonal manner relative to the central body 205.

[0201] For convenience of description, the fixing portion 210A and 210B connected to the antenna module 110 is referred to as the first fixing portion 210A, and the fixing portion 210A and 210B connected to the cable housing tube 230 is referred to as the second fixing portion 210B.

[0202] That is, unlike the above-mentioned ordinary multifunctional link 200 which only has a fixing portion 210 and a ball joint portion 220 connected to the side of the antenna module 110, thereby realizing the directional adjustment of the tilt rotation and the steering rotation of the antenna module 110 at only one point, the multifunctional link 200' of the modified example has a first fixing portion 210A and a first ball joint portion 220A connected to the side of the antenna module 110, and has a second fixing portion 210B and a second ball joint portion 220B which are additionally connected on the side of the cable receiving tube 230.

[0203] In more detail, Figure 21 to Figure 23As shown, the multifunctional link 200' of the modified example may include: a central body 205; a first fixed portion 210A, connected between the antenna modules 110 at the two ends of the central body 205; a second fixed portion 210B, connected between the cable receiving tube 230 at the two ends of the central body 205; a first ball joint portion 220A, a portion of one of the two ends is received and combined in the internal space of the first fixed portion 210A, and the other of the two ends is connected to the antenna module 110, so as to adjust the direction of the antenna module 110 by tilting or turning action; and a second ball joint portion 220B, a portion of one of the two ends is received and combined in the internal space of the second fixed portion 210B, and the other of the two ends is connected to the cable receiving tube 230 used for intervening in the connection with the wireless unit 120, so as to further adjust the direction of the antenna module 110.

[0204] Fig.24 To express Fig.21 A cross-sectional view of the inner and outer joints of the multifunctional connecting rod of the modified example, Fig.25 for Fig.21 A cross-sectional view of a multifunctional connecting rod of a modified example, Fig.26 To express Fig.21 A cross-sectional view of a male connector of a multifunctional connecting rod according to a modified example, Fig. 27 for Fig.21 An exploded perspective view of a multifunctional connecting rod according to a modified example of Fig.28 for Fig. 27 A cutaway stereogram of Fig.29 for Fig. 27 A cross-sectional view of Fig.30 To express Figure 25 to Figure 29 The cutaway perspective view of the anti-over-rotation locking portion referred to, Fig.31 To express Fig.30 The internal front view of the operating state of the anti-over-rotation locking part, Fig.32 To express Fig.21 A sectional view, a cutaway stereoscopic view and a partially enlarged view of a cable housing tube in the structure of a multifunctional connecting rod of a modified example.

[0205] In the modified example of the multifunctional connecting rod 200 ′, as Fig.24 As shown, the male connector 250 disposed at the end of the first ball joint portion 220A or the second ball joint portion 220B can be coupled to the female connector 150 disposed at the antenna module 110 or the wireless unit 120 by an inside-out coupling action.

[0206] In more detail, the guide ring 254 of the male connector 250 can be received inside the ring receiving groove 154 formed in the female terminal 151 of the female connector 150, and contact with the foreign matter inflow prevention ring 155 clamped on the inner side of the ring receiving groove 154 to perform waterproofing. At the same time, the guide pin 252 and the terminal pin 253 of the male connector 250 can be inserted into the guide groove 152 and the terminal groove 153 of the female connector 150 to achieve electrical connection.

[0207] Among them, Fig.24 As shown, a grounding gasket 258 may also be provided between the female connector 150 and the male connector 250 .

[0208] The grounding gasket 258 can be fixed to the gasket setting groove (see Fig.28 As shown in the figure mark "258h", when the male connector 250 is combined with the female connector 150 inside and outside, the contact between the male terminal 251 of the male connector 250 and the female terminal 151 of the female connector 150 can be guided to perform the grounding (GND) function.

[0209] At the same time, the grounding gasket 258 is a structural element that can perform the electromagnetic interference (EMI) shielding function while performing the above-mentioned grounding (GND) function. Generally, in the case of the coaxial cable 240, it can be set to a gasket shape surrounding the periphery of the corresponding terminal pin 253, but in the case of the male connector 250 in the multifunctional connecting rod 200 of the present invention, it is set to a single metal gasket shape between each terminal pin 253, especially in the center. This grounding gasket 258 can prevent signal crosstalk between each terminal pin 253 of the connector of the present invention.

[0210] In such a male connector 250 , a part of the male terminal 251 may be inserted and fixed to the front end portion side of the first ball joint portion 220A or the second ball joint portion 220B.

[0211] The male connector 250 may be fixed via at least one headless bolt 259 to prevent rotation relative to the first ball joint portion 220A or the second ball joint portion 220B.

[0212] In more detail, Figure 25 to Figure 27 As shown, two bolt through holes 259h-1 can be formed at intervals of 180 degrees at the front end of the first ball joint portion 220A or the second ball joint portion 220B, and the bolt fastening hole 259h-2 for fastening the headless bolt 259 can be formed in a corresponding manner on the outer peripheral surface of the male terminal 251 of the male connector 250.

[0213] A tool groove 259T for inserting the front end of a fastening tool (not shown) with a four-corner profile is formed on the outer side of the headless bolt 259. The male connector 250 can be conveniently fixed using a fastening tool through the tool groove 259T to prevent the headless bolt 259 from being exposed to the outside.

[0214] Like this, the male connector 250 is inserted and fixed to the front end of the first ball joint part 220A or the second ball joint part 220B by means of the headless bolt 259, and at the same time, is locked in the rotation direction, thereby preventing the male connector 250 from arbitrarily rotating the first ball joint part 220A or the second ball joint part 220B, thereby preventing the terminal pin 253 or the guide pin 252 from changing the connection direction of the terminal groove 153 or the guide groove 152 of the female connector 150.

[0215] On the other hand, the fixing nut 256 is pre-installed temporarily on the outer peripheral surface of the first ball joint portion 220A or the second ball joint portion 220B in a snap-on manner, and, as described above, when the male connector 250 completes the electrical connection with the female connector 150, the fixing nut 256 is tightened to the external thread (not shown in the drawings) formed on the outer peripheral surface of the female terminal 151 of the female connector 150 and is firmly fixed.

[0216] At this time, a C-ring fastening groove 257h can be formed on the outer peripheral surface of the first ball joint part 220A or the second ball joint part 220B. When the C-ring 257 is fastened to the C-ring fastening groove 257h, the rotational force is limited when the fixing nut 256 is tightened, thereby preventing component damage caused by over-assembly of the fixing nut 256.

[0217] On the other hand, Figure 28 to Figure 31 As shown, the multifunctional connecting rod 200' of the modified example may also have an over-rotation prevention locking portion 226A, which is used to prevent over-rotation of the first fixing portion 210A or the second fixing portion 210B of the first ball joint portion 220A or the second ball joint portion 220B.

[0218] The over-rotation prevention locking portion 226A has a locking protrusion 226A-1, which is fixed to the internal space corresponding to the first fixing portion 210A and the first ball joint portion 220A or the second fixing portion 210B and the second ball joint portion 220B, and protrudes in the internal space in the opposite directions. That is, in the over-rotation prevention locking portion 226A, a pair of locking protrusions 226A-1 are arranged approximately 180 degrees apart and can extend toward the internal space by a predetermined length.

[0219] On the other hand, a pair of locking plates 228 may be formed inside the first ball joint 220A or the second ball joint 220B, and the pair of locking plates 228 extend toward the center body 205 so as to be locked with a pair of locking protrusions 226A-1 at least within the rotation radius.

[0220] like Fig.31 As shown, when no tilting or turning action is performed, the rotational direction separation angles of the pair of locking plates 228 of the first ball joint portion 220A or the second ball joint portion 220B and the pair of locking protrusions 226A-1 are 90 degrees (refer to Fig.31 (a) part), and when the first ball joint portion 220A or the second ball joint portion 220B is rotated to tilt or turn in one direction or another, the rotation angle in each direction can be limited to a maximum of 90 degrees.

[0221] This is to prevent the plurality of coaxial cables 240 from becoming entangled in the internal space due to excessive rotation of the first ball joint portion 220A or the second ball joint portion 220B.

[0222] The first ball joint 220A is connected to the female connector 150 of the antenna module 110 via the male connector 250, and the second ball joint 220B is connected to the upper end of the cable receiving tube 230 formed vertically from top to bottom via the male connector 250. Theoretically, in the absence of an anti-over-rotation locking portion 260A, the left and right turning angle of the antenna module 110 is 360 degrees without any restrictions.

[0223] However, due to the over-rotation prevention locking portion 260A, the rotation angle of the second ball joint portion 220B relative to the upper end of the cable storage tube 230 is limited to 90 degrees, and can be limited to rotate to 90 degrees in addition to the maximum rotation limit angle a of the second ball joint portion 220B in the physical one side and the other side. For example, when the maximum rotation limit angle a is 40 degrees, the maximum turning angle of the antenna module 110 can be limited to 130 degrees at a time in one direction or the other direction.

[0224] On the other hand, in the structure of the multifunctional connecting rod 200' of the modified example, as shown in FIG. Fig.32 As shown, the cable receiving tube 230 can be defined as having the male connector 250 and the female connector (at both ends) respectively disposed thereon. Fig.32 ” (indicated by reference numeral “ 250C” in the figure), and includes a concept for connecting a plurality of coaxial cables 240 between a male connector 250 and a female connector 250C.

[0225] Among them, unlike the coaxial cables 240 arranged inside the central body 205, the first fixed part 210A, the second fixed part 210B, the first ball joint part 220A and the second ball joint part 220B, which are formed of flexible materials so as to move in conjunction with the tilting or turning movement of the antenna module 110, the multiple coaxial cables 240 do not need to move in the cable receiving tube 230, and therefore, can be formed of a strong material, or can be firmly fixed to prevent movement in the cable receiving tube 230.

[0226] At the same time, in order to distinguish with the setting direction, at the two ends of the cable housing tube 230, the part combined with the male connector 250 of the second ball joint part 220B can be set to the form of a female connector 250C, and the part combined with the female connector 150 of the wireless unit 120 can be set to the form of a male connector 250.

[0227] Fig.33 For illustration Fig.21 A projected top view of the effect of the multifunctional connecting rod of the modified example.

[0228] like Fig.33 As shown, the multifunctional link 200 ′ of the modified example constructed in this way can increase the tilting or turning action of the antenna module 110 compared to the ordinary multifunctional link 200 to adjust the directivity of the antenna module 110 .

[0229] In more detail, generally, when the antenna module 110 constructs a 2T2R transmission channel, two coaxial cables 240 housed in the cable housing tube 230 can be set; when the antenna module 110 constructs a 4T4R transmission channel, four coaxial cables 240 housed in the cable housing tube 230 can be set.

[0230] Among them, according to the ordinary multi-functional connecting rod 200, once the cable storage tube 230 is fixed to the female connector 150 of the antenna module 110 using the male connector 250, if the antenna module 110 is turned in the direction of the arrow (including one direction and the other direction), it has the limitation that the turning action can only be performed within the range of the maximum rotation angle a in the left and right horizontal directions of the ball joint part 220.

[0231] In particular, when the two coaxial cables 240 are housed in the cable housing tube 230, although not shown in the drawings, the terminal grooves 153 and the terminal pins 253 in the female connector 150 and the male connector 250 for electrically connecting the two coaxial cables 240 to the wireless unit 120 are formed at the 3 o'clock direction and the 9 o'clock direction, respectively, with reference to the ground, and thus, the directivity of the antenna module 110 cannot be adjusted by turning more than 90 degrees in one direction or the other direction, respectively. This is because the connection direction of the two coaxial cables 240 of the female connector 150 with respect to the wireless unit 120 has been preset to the 3 o'clock direction and the 9 o'clock direction.

[0232] For this reason, in the case of two coaxial cables 240, it is impossible to accurately set the directivity of the antenna module 110 at 90 degrees to the left or right relative to the front surface of the wireless unit 120 within the limit that the maximum rotation angle a in the left and right horizontal directions mentioned above fails to be 90 degrees to the left or right direction (this is also impossible to achieve when the female connector 150 and the male connector 250 are separated and the connection position of the terminal pin 253 relative to the terminal slot 153 is changed for reassembly). In order to achieve this, reassembly must be performed so that the setting position of the terminal slot 153 of the female connector 150 combined with the wireless unit 120 is changed. In this case, the setting of the 90-degree directivity in a certain direction is still limited.

[0233] However, this limitation is reduced when the four coaxial cables 240 are accommodated in the cable receiving tube 230. Fig.33 As shown, this is because the terminal grooves 153 and the terminal pins 253 in the female connector 150 and the male connector 250 for electrically connecting the four coaxial cables 240 to the wireless unit 120 are spaced apart at 90 degrees in the circumferential direction at four locations. In this case, even if there is no process of separating the female connector 150 from the wireless unit 120 and reassembling it, the directionality adjustment in the left and right 90-degree direction with respect to the front surface of the wireless unit 120 can be performed by simply releasing the connection between the female connector 150 and the male connector 250 and then reconnecting them in a process matching the terminal pins 253 and the terminal grooves 153 that can be designed to be directional in the direction desired by the designer.

[0234] On the contrary, the multifunctional link 200' of the modified example has a first fixed portion 210A and a first ball joint portion 220A, a second fixed portion 210B and a second ball joint portion 220B in a manner orthogonal to the two end portions, based on the central body 205. Therefore, in an embodiment in which two coaxial cables 240 are accommodated in a cable accommodation tube 230, even if the antenna module 110 is rotated to one side or the other side by a turning action to adjust the directivity, the limitation of the maximum limited turning angle a of the second fixed portion 210B and the second ball joint portion 220B based on the two fixed portions 210A, 210B and the two ball joint portions 220A, 220B that perform a 360-degree turning action based on the vertical axis will disappear. Therefore, even in the process of not separating from the wireless unit 120 and re-combining the female connector 150, the directionality can be adjusted in all directions of 360 degrees. Of course, as described above, when the rotation of the second ball joint portion 220B relative to the second fixed portion 210B is limited to 90 degrees due to the anti-over-rotation locking portion 260A, in addition to the above-mentioned maximum limited steering angle a, the rotation limit on one side or the other side of the antenna module 110 can derive the same result in terms of expanding 90 degrees each time.

[0235] That is, in the modified example of the multifunctional link 200', since the second fixing portion 210B and the second ball joint portion 220B are additionally provided, the restricted range of the turning movement of the antenna module 110 based on the wireless unit 120 can be removed. Therefore, even in the case of resetting the directional adjustment, there is no need to separate and reassemble the female connector 150 from the wireless unit 120, and the directional adjustment of the antenna module 110 can be easily performed on site.

[0236] For reference, when the antenna module 110 is tilted, Fig.24 As shown in the figure mark "a", the maximum tilt limit angle a of the antenna module 110 combined with the multifunctional connecting rod 200' of the modified example is also based on the central body 205, and has two fixing parts 210A, 210B and two ball joint parts 220A, 220B at both ends, thereby creating the benefit of doubling 2a.

[0237] The small base station antenna device 100 and its connector 150' according to one embodiment of the present invention are described in detail with reference to the accompanying drawings. However, the embodiments of the present invention are not limited to the above-mentioned one embodiment, and can be modified in many ways and implemented in the equivalent scope by ordinary technicians in the technical field to which the present invention belongs. Therefore, the true protection scope of the present invention should be determined by the claims.

[0238] Industrial Applicability

[0239] The present invention provides a small base station that is convenient for constructing micro cells in public places, densely populated areas, large shopping malls, airport buildings, etc., and can adjust the directivity even when the various cables for electrically connecting the wireless unit and the antenna module are not exposed to the outside, thereby preventing the aesthetics (appearance beauty) from being reduced. In addition, a part of an antenna module can be divided to cover different frequency bands or multiple antenna modules can be made to cover different frequency bands respectively, thereby realizing a dual-band small base station antenna device and its connector in a variety of places.

Claims

1. A small base station antenna device, characterized in that: include: Wireless unit; at least one antenna module arranged in a manner to perform tilting and turning movements relative to the wireless unit; as well as A multifunctional connecting rod, used to intervene in the setting of each antenna module to the wireless unit, The multifunctional connecting rod comprises: centrosome; A first fixing portion connected between the antenna modules at both ends of the central body; and A second fixing portion is connected between the wireless units at both ends of the central body, The first fixing portion and the second fixing portion are connected via a ball joint portion, so that the antenna module is arranged in a manner of tilting and rotating relative to the wireless unit.

2. The small base station antenna device according to claim 1, characterized in that: The ball joint portion comprises: A first ball joint, wherein a portion of one of the two ends is received and coupled to the inner space of the first fixing portion, and the other of the two ends is connected to the antenna module, so as to adjust the directionality of the antenna module by tilting or turning; and The second ball joint part has a portion of one of the two end portions received and coupled to the internal space of the second fixing portion, and the other of the two end portions is connected to a cable receiving tube for intervening in the connection with the wireless unit, so as to further adjust the directionality of the antenna module.

3. The small base station antenna device according to claim 1, characterized in that: The multifunctional link is electrically connected to the antenna module and the wireless unit via a connector.

4. The small base station antenna device according to claim 3, characterized in that: The connector comprises: a male connector coupled to a front end of a plurality of coaxial cables hidden within the multifunctional connecting rod; and The female connector is arranged on the antenna module and the wireless unit.

5. The small base station antenna device according to claim 4, characterized in that: It includes a coupling flange and a female terminal. When the female connector is arranged on the wireless unit, the coupling flange has an inner side surface directly connected to the RF filter arranged inside the wireless unit, and the female terminal has an outer side surface connected to the male connector.

6. The small base station antenna device according to claim 5, characterized in that: In the female connector, a number of through pin terminals corresponding to the number of the coaxial cables are formed to penetrate the inner side surface of the coupling flange and the outer side surface of the female terminal.

7. The small base station antenna device according to claim 6, characterized in that: The number of the plurality of coaxial cables is set to be one of two for constructing a 2T2R transmission line between the wireless unit and the antenna module and four for constructing a 4T4R transmission line between the wireless unit and the antenna module. The male connector is formed with terminal pins corresponding to the number of the plurality of coaxial cables. The female connector is correspondingly formed with terminal grooves into which the terminal pins are respectively inserted and connected.

8. The small base station antenna device according to claim 6, characterized in that: In the female connector, the coupling flange is directly fastened to the RF filter using a plurality of screws in a state of being engaged with the RF filter.

9. The small base station antenna device according to claim 6, characterized in that: The front end of each through-pin terminal of the female connector is directly connected to a feed connector provided on the RF filter.

10. The small base station antenna device according to claim 7, characterized in that: The male connector further includes a grounding washer, and in the case where four coaxial cables are provided, the grounding washer is provided in odd numbers at the center of the terminal pins corresponding to the coaxial cables.

11. The small base station antenna device according to claim 4, characterized in that: The cable storage tube stores a plurality of coaxial cables so as to be hidden from the outside, one end of which is connected to the wireless unit, and the other end of which is connected to the second ball joint portion of the second fixing portion. The male connector is connected to one end and the other end of the coaxial cable.

12. The small base station antenna device according to claim 11, characterized in that: The male connector comprises: A male terminal connected to one end and the other end of the coaxial cable; a plurality of guide pins protruding from the male terminal toward the female connector side; a plurality of terminal pins extending from the coaxial cable and extending from the male terminal to protrude toward the female connector; and The fixing nut maintains the electrical connection force of the plurality of terminal pins to the female connector.

13. The small base station antenna device according to claim 12, characterized in that: The fixing nut maintains the connection force by being fastened to the nut fastening end provided on the female connector.

14. The small base station antenna device according to claim 1, characterized in that: The antenna module arranges multiple antenna sub-arrays on an antenna board to cover dual frequency bands. Antenna beam forming is achieved in different frequency bands within the same direction of the antenna module set by the multifunctional link.

15. The small base station antenna device according to claim 1, characterized in that: Arrange multiple antenna sub-arrays in the antenna module to cover different frequency bands. Furthermore, the directionality is set in different directions by means of the multifunctional connecting rod.

16. The small base station antenna device according to claim 1, characterized in that: The antenna module is configured to be used as a microcell base station.

17. The small base station antenna device according to claim 1, characterized in that: The wireless unit is arranged on one of a supporting pole, a wall and a ceiling arranged indoors.

18. The small base station antenna device according to claim 2, characterized in that: The first fixing portion and the second fixing portion are connected to the central body in a mutually orthogonal manner.

19. The small base station antenna device according to claim 2, characterized in that: The multifunctional connecting rod also includes an anti-over-rotation locking portion, which is used to limit the angle of the first ball joint portion or the second ball joint portion relative to the first fixing portion or the second fixing portion in the rotation direction.

20. The small base station antenna device according to claim 2, characterized in that: The anti-over-rotation locking portion is fixed to the internal space corresponding to the first fixing portion and the first ball joint portion or the second fixing portion and the second ball joint portion, and a pair of locking protrusions protruding in opposite directions in the internal space are arranged in a manner of locking to a pair of locking plates extending toward the center body side inside the first ball joint portion or the second ball joint portion.

21. The small base station antenna device according to claim 20, characterized in that: When the antenna module is not tilting or turning, the pair of locking plates and the pair of locking protrusions are arranged such that a spaced angle in the rotation direction is 90 degrees.

22. A connector for a small base station antenna device, characterized in that: The small base station antenna device includes: Wireless unit; at least one antenna module arranged in a manner to perform tilting and turning movements relative to the wireless unit; and A multifunctional connecting rod, used to intervene in the setting of each antenna module to the wireless unit, The connectors for the small base station antenna assembly include: a male connector coupled to a front end of a plurality of coaxial cables hidden within the multifunctional connecting rod; and The female connector comprises a coupling flange and a female terminal, wherein the coupling flange has an inner side surface directly connected to an RF filter arranged inside the wireless unit, and the female terminal has an outer side surface connected to the male connector.

23. The connector of the small base station antenna device according to claim 22, characterized in that: In the female connector, a number of through pin terminals corresponding to the number of the coaxial cables are formed to penetrate to connect the inner side surface and the outer side surface.

24. The connector of the small base station antenna device according to claim 23, characterized in that: The number of the plurality of coaxial cables is set to be one of two for constructing a 2T2R transmission line between the wireless unit and the antenna module and four for constructing a 4T4R transmission line between the wireless unit and the antenna module. The male connector is formed with terminal pins corresponding to the number of the plurality of coaxial cables. The female connector is correspondingly formed with terminal grooves into which the terminal pins are respectively inserted and connected.

25. The connector of the small base station antenna device according to claim 23, characterized in that: In a state where the coupling flange is in contact with the RF filter, the female connector is directly fastened to the RF filter using a plurality of screws.

26. The connector of the small base station antenna device according to claim 23, characterized in that: The front end of each through-pin terminal of the female connector is directly connected to a feed connector provided on the RF filter.

27. The connector of the small base station antenna device according to claim 24, characterized in that: The male connector further includes a grounding washer, and in the case where four coaxial cables are provided, the grounding washer is provided in odd numbers at the center of the terminal pins corresponding to the coaxial cables.

28. The connector of the small base station antenna device according to claim 22, characterized in that: When the multifunctional connecting rod includes: a central body; a first fixing part, which is connected between the antenna modules at the two ends of the central body; a second fixing part, which is connected between the wireless units at the two ends of the central body; a first ball joint part, a part of one of the two ends is accommodated and combined in the internal space of the first fixing part, and the other end of the two ends is connected to the antenna module, so as to adjust the direction of the antenna module by tilting or turning action; and a second ball joint part, a part of one of the two ends is accommodated and combined in the internal space of the second fixing part, and the other end of the two ends is connected to a cable receiving tube for intervening in the connection with the wireless unit, so as to further adjust the direction of the antenna module, in the female connector, a number of through-pin terminals corresponding to the coaxial cable received in the cable receiving tube are penetrated to connect the inner side surface and the outer side surface.

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