WO2018135831A1 - Phase shift module and communication device comprising same - Google Patents

Abstract

Provided are a phase shift module and a communication device comprising same. The phase shift module, according to one embodiment of the present invention, comprises: a plurality of phase shifters which are arranged in parallel and respectively comprise a fixed line, a plurality of transmission lines and a coupling shifter, the fixed line having one end connected to an input terminal into which a wireless signal is inputted, having the other end connected to one of a plurality of output terminals from which the wireless signal is outputted, and having a coupling point formed between the one end and the other end, the plurality of transmission lines being spaced apart from each other on the upper side of the fixed line, having an arc shape, and having both ends respectively connected to different output terminals, and the coupling shifter being formed at the coupling point, rotating within a predetermined angle range, and shifting the phase of the wireless signal by coupling-feeding each of the plurality of transmission lines; a first gear which is disposed between the plurality of phase shifters; a rod extending in one direction from one side of the first gear; and a second gear which comprises a hollow part through which the rod passes, and engages with the first gear by rotating with the rod, wherein the first gear is connected with the respective coupling shifters of the phase shifters, and by being engaged with the second gear, simultaneously rotates each of the coupling shifters within a predetermined angle range.

Description

Phase displacement module and communication device including the same

Embodiments of the present invention relate to a phase shift module for adjusting the angle of a beam radiated from a base station antenna and a communication device including the same.

A phase shifter is a device that adjusts the angle of a beam emitted from a base station antenna by varying the phase of a radio signal according to a power distribution principle. The beam radiated from the base station antenna may be tilted up or down by a phase shifter, and a service provider may use the same to provide an optimal service in various communication environments.

However, in the case of the conventional phase shifter, the phase of the radio signal is varied by rotating the coupling variable or controlling the power distribution ratio of the coupling variable, and the transmission line merely performs a role of power transmission. Accordingly, in the related art, there is a problem in that a loss variation of each band at each output terminal of the phase shifter, that is, a power distribution ratio variation between the low frequency band and the high frequency band is large. In this case, the sophistication of the phase shifter is degraded, which may degrade the performance and quality of the base station antenna. In addition, in the prior art, there was a physical difficulty in changing the transmission line itself, and thus there was a limit in extending the bandwidth for smooth signal transmission and reception.

Embodiments of the present invention are to provide a phase shift module and a communication device including the same to minimize the loss variation of each band of the output stage.

According to an exemplary embodiment of the present invention, one end is connected to an input terminal to which a wireless signal is input, the other end is connected to one of a plurality of output terminals from which the wireless signal is output, and a coupling point is formed between the one end and the other end. Fixed lines, a plurality of transmission lines are formed spaced apart from each other on the upper side of the fixed line and formed in an arc shape and both ends are connected to different output ends, and formed at the coupling point and rotate within a set angle range. A plurality of phase shifters, each of which comprises a coupling variabler for coupling and feeding the plurality of transmission lines to vary the phase of the radio signal, the plurality of phase shifters being parallel to each other; A first gear disposed between the plurality of phase shifters; A rod extending in one direction from one side of the first gear; And a second gear through which the rod penetrates, the second gear being engaged with the first gear while rotating with the rod, wherein the first gear is connected to a coupling variable of each phase shifter, A phase shift module is provided, which meshes with a second gear to simultaneously rotate each of the coupling variable within a set angle range.

In the coupling point, a fitting hole is formed, and in the first gear, a rotation shaft fitted to the fitting hole and simultaneously rotating each of the coupling variable as the first gear rotates is directed toward the plurality of phase shifters. Each may be extended.

A fixing member may be formed at each end of each coupling variabler to fix the coupling variabler to each other.

At least one of the plurality of phase shifters may include at least one support member formed on a substrate to support the rod.

In the support member, a through hole for penetrating the rod may be formed.

The plurality of phase shifters includes a first phase shifter and a second phase shifter disposed in parallel with the first phase shifter, wherein an area of the second phase shifter is greater than that of the first phase shifter. Can be large.

Each of the plurality of transmission lines may be provided with a plurality of slots having an arc shape along an extension direction of the transmission line, and the plurality of slots may be stacked in a predetermined interval.

At least one of the plurality of transmission lines may be formed with one or more slits.

The plurality of transmission lines include a first transmission line and a second transmission line, and the coupling variable couples the first coupling input unit and the second transmission line to couple and feed the first transmission line. And a second coupling input for ring feeding.

A plurality of slits may be formed on the first transmission line at predetermined intervals, and at least a portion of the first transmission line between the plurality of slits may protrude to a side of the second transmission line by a predetermined thickness.

In the coupling variable, a slot may be formed along an extension direction of the coupling variable.

The plurality of transmission lines may include a first group slot in which a plurality of first slots are stacked and a second group slot in which a plurality of second slots are stacked, and the second group slot may include the first group slot. It may be formed to be spaced apart from the predetermined interval.

An insulating film may be further disposed on the plurality of transmission lines, and the coupling variable may be seated on the insulating film.

According to another exemplary embodiment of the present invention, a phase shift module described above; And a base station antenna having a plurality of radiating elements connected with the phase shift module.

The plurality of radiating elements may be formed on the front surface of the base station antenna, and the phase shift module may be formed on the rear surface of the base station antenna.

According to embodiments of the present invention, by forming a plurality of arc-shaped slots in the transmission line, it is possible to extend the operating frequency band of the base station antenna and reduce the loss variation for each band of each output terminal of the phase shifter. In particular, according to embodiments of the present invention, by changing the physical structure of the transmission line, unlike the conventional phase shifter, it is possible to vary the impedance of the phase shifter and minimize the difference in signal magnitude values at the output stage.

In addition, according to embodiments of the present invention, by allowing the first gear, the rod and the second gear to operate in conjunction with each other, it is possible to integrate a plurality of phase shifters in a simpler way. In this case, the structure of the phase shift module can be simplified to reduce the unit cost of the phase shift module, and the user can adjust the angle of the beam emitted from the base station antenna in a simpler manner.

1 is an exemplary view of a phase shifter according to an embodiment of the present invention.

2 is an exemplary view of a slot according to an embodiment of the present invention.

3 is an exemplary diagram of a coupling variable according to an embodiment of the present invention.

4 is an exemplary view of a phase shifter according to another embodiment of the present invention.

5 is an exemplary view of a phase shifter according to another embodiment of the present invention.

6 is an exemplary view illustrating a process of rotating a coupling variable of a phase shifter according to embodiments of the present invention.

7 is a diagram illustrating a communication device and a base station antenna according to an embodiment of the present invention.

8 is a perspective view of a phase shift module according to an embodiment of the present invention;

9 is an exploded view of a phase shift module according to an embodiment of the invention;

10 is a side view of a phase shift module according to an embodiment of the invention

11 is a graph showing the loss deviation of each output stage of the conventional phase shifter for each band

12 is a graph illustrating loss deviation of each output stage of a phase shifter according to embodiments of the present invention;

Hereinafter, specific embodiments of the present invention will be described with reference to the drawings. The following detailed description is provided to assist in a comprehensive understanding of the methods, devices, and / or systems described herein. However, this is only an example and the present invention is not limited thereto.

In describing the embodiments of the present invention, when it is determined that the detailed description of the known technology related to the present invention may unnecessarily obscure the gist of the present invention, the detailed description thereof will be omitted. In addition, terms to be described below are terms defined in consideration of functions in the present invention, which may vary according to the intention or custom of a user or an operator. Therefore, the definition should be made based on the contents throughout the specification. The terminology used in the description is for the purpose of describing embodiments of the invention only and should not be limiting. Unless expressly used otherwise, the singular forms “a,” “an,” and “the” include plural forms of meaning. In this description, expressions such as "comprises" or "equipment" are intended to indicate certain features, numbers, steps, actions, elements, portions or combinations thereof, and one or more than those described. It should not be construed to exclude the presence or possibility of other features, numbers, steps, actions, elements, portions or combinations thereof.

1 is an exemplary view of a phase shifter 100 according to an embodiment of the present invention, FIG. 2 is an exemplary view of a slot 140 according to an embodiment of the present invention, and FIG. 3 is an embodiment of the present invention. An illustration of a coupling variable variable 120 according to an example.

Phase shifter 100 according to an embodiment of the present invention is a device for adjusting the angle of the beam radiated from the base station antenna (not shown), and receives a wireless signal through the input terminal 162 a plurality of output terminals 164 , 166, 168, 170, and 172 may output the wireless signal. In this case, the base station antenna may include a plurality of radiating elements (not shown), and each radiating element may be formed in front of the base station antenna. In addition, the phase shifter 100 is formed on the rear surface of the base station antenna to perform a heat dissipation role and a power transmission role, and may be connected to the plurality of radiating elements through a cable (not shown).

In the present embodiments, for convenience of description, it is assumed that the base station antenna includes five radiating elements, and the phase shifter 100 includes one input terminal 162 and five output terminals 164, 166, 168, 170, and 172. It is assumed to be provided. In this case, the first output terminal 164 is connected to the first radiating element of the base station antenna via a cable, the second output terminal 166 is connected to the second radiating element of the base station antenna via a cable, and the third output terminal 168. ) Is connected to the third radiating element of the base station antenna via a cable, and the fourth output terminal 170 is connected to the fourth radiating element of the base station antenna via a cable, and the fifth output end 172 is connected to the third radiating element of the base station antenna via a cable. It may be connected with the fifth radiating element. Hereinafter, a detailed configuration of the phase shifter 100 will be described in detail with reference to FIGS. 1 to 3.

1 to 3, the phase shifter 100 according to an embodiment of the present invention includes a fixed line 102, a plurality of transmission lines 104 and 106, a substrate 110, and a coupling variable. Group 120.

The fixed line 102 has one end connected to an input terminal 162 through which a wireless signal is input, and the other end is connected to one of a plurality of output terminals from which the wireless signal is output, for example, the first output terminal 164. The fixed line 102 may be formed on the substrate 110 and may be made of a conductive material. In addition, as shown in FIG. 1, the fixed line 102 may be formed of a combination of a plurality of straight portions and curved portions, and at least one of each of the straight portions may have a different thickness or extend in different directions. have.

In addition, a coupling point 102a may be formed between one end and the other end of the fixed line 102. As will be described later, the coupling variable 120 may be formed at the coupling point 102a, and the plurality of transmission lines 104 while rotating within a set angle range (for example, in the range of 45 to 180 degrees). 106) may be coupled to each other. In this case, the electrical length from the current position of the coupling variable 120 to the corresponding radiating element may be changed so that the phase of the wireless signal may be varied. In this case, fitting holes 102b and feeding points 120a having a predetermined size may be formed in the coupling point 102a and the coupling variable 120, respectively, and a rotating shaft (not shown) may be formed in the fitting hole 102b. This can be inserted to rotate the coupling variable 120.

The transmission lines 104 and 106 are lines for transmitting a radio signal to an output terminal, and may include, for example, a first transmission line 104 and a second transmission line 106. However, the number of transmission lines 104 and 106 is not limited thereto, and the number of transmission lines 104 and 106 may include the number of output terminals 164, 166, 168, 170, and 172 or the radiating elements provided in the base station antenna. It may vary depending on the number of.

The first transmission line 104 and the second transmission line 106 may be formed on the substrate 110 and may be made of a conductive material. In this case, the first transmission line 104 and the second transmission line 106 may be formed spaced apart from each other on the upper side of the fixed line (102). In addition, the first transmission line 104 and the second transmission line 106 may be formed in an arc shape and both ends may be connected to different output terminals, respectively. As an example, one end of the first transmission line 104 may be connected to the second output terminal 166 and the other end of the first transmission line 104 may be connected to the third output terminal 168. 170, and the other end thereof may be connected to the fifth output terminal 172.

In addition, a plurality of arc-shaped slots 140 may be formed in each of the first transmission line 104 and the second transmission line 106 along the extending direction of the transmission lines 104 and 106. Slot 140 is to extend the operating frequency band of the base station antenna and to reduce the loss deviation for each band of the output stage (164, 166, 168, 170, 172) of the phase shifter 100, each transmission line (104, 106) It may be formed in plural. As illustrated in FIGS. 1 and 2, the plurality of slots 140 may be stacked on the transmission lines 104 and 106 at predetermined intervals in one direction. In this case, each of the transmission lines 104 and 106 may include a first group slot 140a in which a plurality of first slots are stacked and a second group slot 104b in which a plurality of second slots are stacked. As an example, the first group slot 140a may include three first slots, and the second group slot 140b may include three second slots. In addition, the second group slot 140b may be formed to be spaced apart from the first group slot 140a by a predetermined interval. However, the number, thickness, size, length, and the like of the slots 140 for each transmission line 104 and 106 shown in FIGS. 1 and 2 may vary depending on the frequency band of a signal to be transmitted and received by the base station antenna.

In addition, one or more slits 150 and slit may be formed in at least a portion of each transmission line 104 or 106. The slit 150 is for finely adjusting the operating frequency band of the base station antenna, and may be formed on at least a portion of each transmission line 104, 106. As illustrated in FIGS. 1 and 2, two slits 150 may be formed in the first transmission line 104 and the second transmission line 106 at predetermined intervals. In this case, the slit 150 may be formed to have a predetermined thickness, for example, at a predetermined angle (for example, 80 degrees to 100 degrees) with the extending direction of the slot 140. Here, the predetermined thickness is, for example, the stacking thickness T of the plurality of slots included in the first group slot 140a (or the second group slot 140b) (that is, the thickness of the plurality of slots and the plurality of slots). Corresponding to a length including a distance between the two slots). In this case, a reduction effect of the band-specific loss variation of each output terminal 164, 166, 168, 170, and 172 of the phase shifter 100 may be maximized.

In addition, as illustrated in FIG. 1, a plurality of slits 150 may be formed in the first transmission line 104 at predetermined intervals, and the first transmission line 104 between the plurality of slits 150 may be formed. At least a portion of may protrude to the second transmission line 106 side by a predetermined thickness (eg, 1 mm). As a result, the impedance of the phase shifter 100 is changed, and the loss variation for each band of the output terminals 164, 166, 168, 170, and 172 of the phase shifter 100 is reduced. In this case, as the power distribution for each radiating element of the base station antenna is adjusted, the beam radiated from each radiating element may be more concentrated in a specific direction (for example, the center side of the base station antenna). Signal transmission and reception efficiency can be improved.

The substrate 110 is a plate on which the fixed line 102 and the transmission lines 104 and 106 are formed, and may be, for example, a printed circuit board (PCB).

Coupling variable 120 is coupled to feed the plurality of transmission lines (104, 106) while rotating within a set angle range to vary the phase of the radio signal. As described above, the coupling variable 120 may be formed at the coupling point 102a to rotate within a set angle range. In this case, fitting holes 102b and feeding points 120a having a predetermined size may be formed in the coupling point 102a and the coupling variable 120, respectively, and a rotation shaft may be inserted in the fitting hole 102b to couple the coupling points 102a and the coupling variable 102. The variable adjuster 120 may be rotated.

In addition, as illustrated in FIG. 3, the coupling variable 120 may include a first coupling input unit 120b and a second coupling input unit 120c. The first coupling input unit 120b and the second coupling input unit 120c may be made of a conductive material. The first coupling input unit 120b may couple and feed the first transmission line 104, and the second coupling input unit 120c may couple and feed the second transmission line 106. To this end, the first coupling input unit 120b may be disposed at a position corresponding to the first transmission line 104, and the second coupling input unit 120c may be spaced apart from the first coupling input unit 120b by a predetermined distance. And may be disposed at a position corresponding to the second transmission line 106. The power distribution by the first coupling input unit 120b and the second coupling input unit 120c has the effect of increasing the operating frequency band of the base station antenna as compared with the power distribution by one coupling input unit. In addition, the coupling variabler 120 may extend to the upper side of the phase shifter 100, that is, the first transmission line 104 and the second transmission line 106. The slot 120d may be formed along the extending direction of the coupling variable 120. The slot 120d serves to extend the operating frequency band of the base station antenna.

In addition, although not shown in the drawings, an insulating film (not shown) may be formed on each of the transmission lines 104 and 106, and the coupling variable 120 may be seated on the insulating film. As a result, it is possible to prevent the transmission lines 104 and 106 from being short-circuited due to the coupling variable 120, and to prevent a phenomenon in which phase shift due to rotation of the coupling variable 120 is delayed. The insulating layer serves to prevent unwanted waves in the performance of passive inter modulation modulation (PIMD).

The ground hole 130 is a configuration for stably grounding the cables connected to the input terminal 162 and the output terminals 164, 166, 168, 170, and 172 as much as possible, and the ground area is reduced due to the ground hole 130. By enlarging, the power of the radio signal can be stably transmitted to each transmission line (104, 106).

As described above, according to embodiments of the present invention, by forming a plurality of arc-shaped slots in the transmission lines 104 and 106, the operating frequency band of the base station antenna is extended and each output terminal 164 of the phase shifter 100 is expanded. , 166, 168, 170, and 172 may reduce the loss variation for each band. In particular, according to embodiments of the present invention, unlike the conventional phase shifter by changing the physical structure of the transmission line (104, 106), the impedance of the phase shifter 100 is varied and the output stage (164, 166, 168, The difference in signal magnitude values at 170 and 172 may be minimized.

4 is an exemplary view of a phase shifter 100 according to another embodiment of the present invention. Here, the components corresponding to the components of the phase shifter 100 according to the embodiment of the present invention described with reference to FIG. 1 perform the same or similar functions as described above, and thus a detailed description thereof will be omitted. Do it.

Referring to FIG. 4, the slit 150 is not formed in the transmission lines 104 and 106 in the phase shifter 100 according to another embodiment of the present invention. That is, the slit 150 may be omitted in some embodiments. In addition, a configuration in which at least a portion of the second transmission line 106 between the slits 150 described above protrudes by a predetermined thickness toward the first transmission line 104 may also be omitted according to an embodiment.

5 is an exemplary view of a phase shifter according to another embodiment of the present invention. Here, the components corresponding to the components of the phase shifter 100 according to the embodiment of the present invention described with reference to FIG. 1 perform the same or similar functions as described above, and thus a detailed description thereof will be omitted. Do it.

Referring to FIG. 5, the first transmission line 104 and the second transmission line 106 may include only the first group slot 140a in which a plurality of first slots are stacked, and the second group slot described above. 140b may not be formed. In this case, the operating frequency band of the base station antenna may vary slightly.

6 is an exemplary view illustrating a process of rotating the coupling variable 120 of the phase shifter 100 according to embodiments of the present invention. As described above, the coupling variable 120 may vary the phase of the wireless signal by coupling and feeding the plurality of transmission lines 104 and 106 while rotating within the set angle range.

Referring to FIG. 6, the coupling variable 120 is rotated clockwise in a state of being disposed at a reference position (center position of the coupling variable 120 of FIG. 6) (the coupling variable 120 of FIG. 6). ) Or rotate counterclockwise (left position of coupling variable 120 of FIG. 6). When the coupling variable 120 rotates clockwise, the beam radiated from the base station antenna tilts downward (eg, beam angle: 0 degrees → 10 degrees → 20 degrees → 30 degrees → 40 degrees…). When the coupling variable is rotated counterclockwise, the beam radiated from the base station antenna is tilted upward (for example, the beam angle is 40 degrees → 30 degrees → 20 degrees → 10 degrees → 0 degrees). Can be

7 to 10 are diagrams for describing the communication device 500 according to an embodiment of the present invention. The communication device 500 according to an embodiment of the present invention includes a base station antenna 300 and a phase shift module 400.

7 to 10 are diagrams for describing the communication device 500 according to an embodiment of the present invention. The communication device 500 according to an embodiment of the present invention includes a base station antenna 300 and a phase shift module 400.

First, referring to FIG. 7, the base station antenna 300 may include a plurality of radiating elements 302, 304, 306, 308, 310, and each radiating element 302, 304, 306, 308, 310 may be It is formed on the front surface of the base station antenna 300 may emit a beam. Here, for convenience of description, the base station antenna 300 has been described as having five radiating elements 302, 304, 306, 308, 310, but this is only an example and the radiating elements 302, 304, 306, 308, The number of 310 may be more or less than this.

In addition, the phase shift module 400 illustrated in FIGS. 8 to 10 is formed on the rear surface of the base station antenna 300, and includes a plurality of phase shifters 100 and 200, a first gear 402, and a rod 404. rod). The second gear 406, the support member 410 and the fixing member 412 are included.

The phase shifters 100 and 200 perform the same functions as the phase shifters shown in FIGS. 1 to 6. The phase shift module 400 may include a first phase shifter 100 and a second phase shifter 200. In this case, the phase shift module 400 of the base station antenna 300 may be compared with when only one phase shifter is used. Performance can be improved. The first phase shifter 100 and the second phase shifter 200 may be disposed in parallel with each other, and may be connected to the plurality of radiating elements 302, 304, 306, 308, and 310. Specifically, the first output terminal 164 of the first phase shifter 100 and the second phase shifter 200 is connected to the first radiating element 302 of the base station antenna 300 through a cable (not shown). The second output terminal 166 of the first phase shifter 100 and the second phase shifter 200 is connected to the second radiating element 304 of the base station antenna 300 through a cable, and has a first phase. The third output terminal 168 of the displacer 100 and the second phase shifter 200 is connected to the third radiating element 306 of the base station antenna 300 through a cable, the first phase shifter 100 And a fourth output terminal 170 of the second phase shifter 200 is connected to the fourth radiating element 308 of the base station antenna 300 through a cable, and the first phase shifter 100 and the second phase shifter. The fifth output terminal 172 of the crisis 200 may be connected to the fifth radiating element 310 of the base station antenna 300 through a cable. In this case, the phase shifters 100 and 200 may adjust angles of beams emitted from the radiating elements 302, 304, 306, 308, and 310.

8 to 10, the area of the second phase shifter 200 (or the substrate area of the second phase shifter 200) is the area of the first phase shifter 100 (or It may be larger than the substrate area of the first phase shifter 100, in which case the operator's convenience in the manufacturing process or handling process of the communication module 500 can be improved.

The first gear 402 is a gear disposed between the plurality of phase shifters 100 and 200 and may be connected to the coupling variable 120 of each phase shifter 100 and 200. As described above, a fitting hole 102b and a feeding point 120a having a predetermined size may be formed in the coupling point 102a and the coupling variable 120, respectively, and the rotation shaft may be formed in the fitting hole 102b. 408 may be accommodated. The rotation shaft 408 may extend to the first phase shifter 100 and the second phase shifter 200, respectively, and may be fixed to the fitting hole 102b. In addition, the first gear 402 may rotate in conjunction with the second gear 406. In detail, the first gear 402 is engaged with the second gear 406 as the second gear 406 rotates, thereby coupling the first phase shifter 100 and the second phase shifter 200. Each of the variables 102 can be rotated simultaneously within a set angle range.

Meanwhile, the first gear 402 may be, for example, a spur gear and the second gear 406 may be, for example, a worm gear. In this case, the area occupied by the first gear 402 and the second gear 406 is minimized to simplify the structure of the phase shift module 400, thereby facilitating the manufacture of the miniaturized phase shift module 400. Become. In addition, the gear ratio between the first gear 402 and the second gear 406, for example, the size (or number) of the protrusions (or teeth) of the first gear 402 and the protrusions of the second gear 406 ( Alternatively, the ratio of the size (or number) may be adjusted to more broadly or more finely adjust the phase shift width of the radio signal. To this end, the first gear 402 and the second gear 406 are configured to be detachable and replaceable with the first gear 402 or the second gear 406 having projections of different sizes (or numbers). Do.

The rod 404 is a member manipulated by a user to rotate the coupling variable 102, and may extend in one direction from one side of the first gear 402. The rod 404 may, for example, be in the shape of a rod and may serve as the axis of rotation of the second gear 406. The user can rotate in a clockwise or counterclockwise direction while holding the rod 404 by hand, in which case the second gear 406 rotates with the rod 404.

The second gear 406 includes a hollow portion through which the rod 404 penetrates and engages with the first gear 402 while rotating with the rod 404. The second gear 406 may be seated on the outer surface of the rod 404, and may rotate together with the rod 404 when the rod 404 rotates according to a user's manipulation. In this case, the first gear 402 may rotate in conjunction with the second gear 406, and as the second gear 406 rotates, the first gear 402 meshes with the second gear 406 to form a first phase shifter. Each of the coupling variable 102 of the 100 and the second phase shifter 200 may be simultaneously rotated within a set angle range.

The support member 410 is formed on the substrate of the second phase shifter 200 to support the rod 404. In this case, the through member 410 may have a through hole 410a through which the rod 404 penetrates. In addition, a plurality of support members 410 may be formed spaced apart from the substrate of the second phase shifter 200 by a predetermined interval. Accordingly, the rod 404 may pass through the through hole 410a and may be supported by the plurality of support members 410 to stably rotate.

The fixing member 412 fixes the coupling variable 120 of the first phase shifter 100 and the coupling variable 120 of the second phase shifter 200 to each other. The fixing member 412 may be fixed to an end of the coupling variabler 120 of the first phase shifter 100 and an end of the coupling variabler 120 of the second phase shifter 200, respectively. Accordingly, the coupling variable 120 of the first phase shifter 100 and the second phase shifter 200 is simultaneously rotated as the first gear 402 rotates.

As described above, according to embodiments of the present invention, the first gear 402, the rod 404, and the second gear 406 interoperate with each other, thereby providing a plurality of phase shifters 100 and 200. It can be integrated in an easy way. In this case, the structure of the phase shift module 500 may be simplified to reduce the unit cost of the phase shift module 500, and the user may adjust the angle of the beam emitted from the base station antenna 300 in a simpler manner.

11 is a graph illustrating loss variation for each band of output stages of a conventional phase shifter. FIG. 11A illustrates the loss variation for each band of the third output terminal of the conventional phase shifter, and FIG. 11B illustrates loss variation for each band of the fifth output terminal of the conventional phase shifter.

Referring to (a) of FIG. 11, it can be seen that loss deviation between the low frequency band and the high frequency band, that is, the power distribution ratio deviation between the high frequency band and the low frequency band is large.

In addition, referring to FIG. 11B, as in FIG. 11A, it can be seen that loss deviation between the low frequency band and the high frequency band, that is, the power distribution ratio deviation between the high frequency band and the low frequency band is large.

12 is a graph illustrating loss deviation of each output terminal of the phase shifters 100 and 200 according to embodiments of the present invention. 12 (a) shows the loss variation for each band of the third output terminal 168 of the phase shifters 100 and 200 according to the embodiments of the present invention, and FIG. 12 (b) shows an embodiment of the present invention. The loss variation for each band of the fifth output terminal 172 of the phase shifters 100 and 200 according to the above-mentioned.

Referring to FIG. 12 (a), it can be seen that the loss deviation between the low frequency band and the high frequency band, that is, the power distribution ratio deviation between the high frequency band and the low frequency band is significantly improved compared to FIG. 11 (a).

In addition, referring to FIG. 12B, the loss deviation between the low frequency band and the high frequency band, that is, the power distribution ratio deviation between the high frequency band and the low frequency band, as in FIG. 12A is greatly improved compared to FIG. 11B. You can see that.

Although the present invention has been described in detail with reference to exemplary embodiments above, those skilled in the art to which the present invention pertains can make various modifications without departing from the scope of the present invention with respect to the above-described embodiments. I will understand. Therefore, the scope of the present invention should not be limited to the described embodiments, but should be defined by the claims below and equivalents thereof.

Claims (15)

1. A fixed line having one end connected to an input terminal to which a wireless signal is input and the other end connected to one of a plurality of output terminals at which the wireless signal is output, and a coupling point formed between the one end and the other end, the upper side of the fixed line A plurality of transmission lines which are formed spaced apart and formed in an arc shape, and both ends of which are connected to different output terminals, respectively, and are coupled to the plurality of transmission lines while being rotated within a set angle range at the coupling point. A plurality of phase shifters disposed in parallel with each other and including a coupling variable for varying the phase of the radio signal;

   A first gear disposed between the plurality of phase shifters;

   A rod extending in one direction from one side of the first gear; And

   A hollow portion through which the rod penetrates, a second gear meshing with the first gear while rotating with the rod,

   And the first gear is connected to the coupling variable of each phase shifter, and meshes with the second gear to rotate each of the coupling variable in the set angle range simultaneously.
2. The method according to claim 1,

   In the coupling point, a fitting hole is formed,

   And a rotation shaft fitted to the fitting hole and simultaneously rotating each of the coupling variable as the first gear rotates to the plurality of phase shifters, respectively.
3. The method according to claim 1,

   At the end of each of the coupling variable, a phase shifting module is provided with a fixing member for fixing each of the coupling variable.
4. The method according to claim 1,

   At least one of the plurality of phase shifters includes at least one support member formed on a substrate to support the rod.
5. The method according to claim 4,

   And a through hole through which the rod penetrates the support member.
6. The method according to claim 1,

   The plurality of phase shifters include a first phase shifter and a second phase shifter disposed in parallel with the first phase shifter,

   And the area of the second phase shifter is greater than the area of the first phase shifter.
7. The method according to claim 1,

   In each of the plurality of transmission lines, a plurality of arc-shaped slots are formed along an extension direction of the transmission line.

   The plurality of slots, the phase shift module is formed by laminating a predetermined interval apart.
8. The method according to claim 7,

   At least some of said plurality of transmission lines, at least one slit (slit) is formed, the phase shift module.
9. The method according to claim 7,

   The plurality of transmission lines include a first transmission line and a second transmission line,

   And the coupling variable includes a first coupling input for coupling feed the first transmission line and a second coupling input for coupling feed the second transmission line.
10. The method according to claim 9,

    In the first transmission line, a plurality of slits are formed at predetermined intervals,

    At least a portion of the first transmission line between the plurality of slits is formed to protrude to the second transmission line by a predetermined thickness.
11. The method according to claim 6,

    The coupling variable, the phase shift module, a slot is formed along the extension direction of the coupling variable.
12. The method according to claim 7,

    The plurality of transmission lines may include a first group slot in which a plurality of first slots are stacked and a second group slot in which a plurality of second slots are stacked.

    And the second group slot is formed spaced apart from the first group slot by a predetermined distance.
13. The method according to claim 6,

    And an insulating film seated on the plurality of transmission lines,

    And the coupling variable is seated on the insulating film.
14. A phase shift module according to any one of claims 1 to 13; And

    And a base station antenna having a plurality of radiating elements coupled with the phase shift module.
15. The method according to claim 14,

    The plurality of radiating elements are formed on the front surface of the base station antenna,

    And the phase shift module is formed on a rear surface of the base station antenna.

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