KR101484154B1 - Multi band antenna system - Google Patents

Abstract

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a multi-band antenna system and a method for performing beam tilting while providing multi-band service using a broadband radiating element supporting multi-band. A multi-band antenna system according to the present invention includes at least one broadband radiating element, a branching filter, and a plurality of phase shifters. At least one broadband radiating element supports multi-band. The branching filter is connected to at least one wideband radiating element, and branches the band-by-band signals contained in the multi-band. A plurality of phase shifters are provided corresponding to the number of multi-bands, and beam tilt is performed in accordance with the bands of the branched signals. In this case, the band does not mean a band for distinguishing transmission / reception in a specific band, but a service band for each service provider.

Description

[0001] Multi-band antenna system [0002]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an antenna system, and more particularly, to a multi-band antenna system capable of beam tilting while serving multi-band with a broadband radiating element supporting multi-band.

As a service provider allocates a plurality of bands (bands) due to diversification of communication services, an antenna according to a frequency band of each service is installed when the base station and the relay station are stationary.

Accordingly, antennas corresponding to a plurality of service bands of a plurality of service providers are sent to the tower of the base station and the relay station. However, there is a limit to the number of antennas that can be installed on a steel tower having a limited installation space. Also, when too many antennas are installed on a steel tower, it has a problem of detracting from the beauty of the city.

To reduce this problem, a service provider uses a multiband antenna that can service two or more frequency bands with one antenna.

For example, in the case of implementing a dual band antenna for a base station, a method generally used is a method in which radiating elements supporting each band are superimposed or arranged in a horizontal direction or a vertical direction. That is, when the difference between the frequency band of the low band and the frequency band of the high band is large and the wavelength becomes about twice, the radiating element supporting the low band and the supporting element supporting the high band are superimposed and arranged . This has the advantage of reducing the overall antenna size.

However, when the difference between the frequency bands of the low band and the high band is not as large as twice the wavelength or less, for example, in the 700 MHz band and the 900 MHz band, the 1.8 GHz band and the 2.1 GHz band, Arrange the antenna of the band. In this case, since the overall size of the antenna becomes large, various problems arise such as occupying a large space for installing the antenna when the base station is stationary.

Korean Patent Publication No. 2002-0048760 (Jun. 24, 2002)

In order to solve this problem, it is possible to consider that a single antenna can transmit and receive two frequency bands, for example, the 700 MHz band, the 900 MHz band, the 1.8 GHz band, and the 2.1 GHz band by making the radiating element wide.

However, since an antenna having a broadband wireless element supporting such a multi-band can not control the beam for each band, there is a problem that the service coverage of each can not be optimized.

Accordingly, it is an object of the present invention to provide a multi-band antenna system capable of beam tilting while serving multi-bands with a broadband radiating element supporting multi-band.

In order to achieve the above object, the present invention provides a multi-band antenna system including at least one broadband radiating element, a branching filter, and a plurality of phase shifters. Wherein the at least one broadband radiating element supports multi-band. The branching filter is connected to the at least one wideband radiating element and branches the band-by-band signals included in the multi-band. The plurality of phase shifters are provided corresponding to the number of multi-bands, and beam tilts the branched signals according to bands.

In the multi-band antenna system according to the present invention, the branching filter may be a diplexer or a triplexer.

In the multiband antenna system according to the present invention, when the wideband radiating element supports two bands, the branching filter is a diplexer or a triplexer. When the wideband radiating element supports three bands, the branching filter is a triplexer.

In the multi-band antenna system according to the present invention, when the broadband radiating element supports two bands, the phase shifter may include two phase shifters each supporting two bands. If the wideband radiating element supports three bands, the phase shifter may include three phase shifters each supporting three bands.

In the multi-band antenna system according to the present invention, the phase shifter includes a base substrate and a variable substrate. Wherein the base substrate has an input port and a plurality of output ports, and the plurality of first transmission lines connecting the input port and the plurality of output ports through at least one Wilkinson divider are discontinuous Respectively. Wherein the variable substrate includes a plurality of second transmission lines connected to the plurality of first transmission lines to form a continuous transmission line, And the length of the transmission line between them is variable.

In the multi-band antenna system according to the present invention, the base substrate has an input port and a plurality of output ports. The base substrate includes at least one Wilkinson divider connected to the input port, the at least one Wilkinson distributor each having two connection ports. In the base substrate, a pair of first transmission lines are discontinuously formed in the two connection ports symmetrically with respect to each other. The plurality of output ports are connected to ends of the first transmission line.

In the multiband antenna system according to the present invention, the variable substrate is movably coupled to the base substrate, and a second transmission line, which physically contacts the first transmission line and continuously connects the first transmission line formed discontinuously, And the second transmission line is superimposed on the first transmission line in accordance with the movement so as to vary the length of the transmission line between the input port and the plurality of output ports.

In the multiband antenna system according to the present invention, the Wilkinson distributor may include a first wire, two connection ports and a resistor. A signal is input to the first wiring. The two connection ports are respectively formed in a second wiring which is symmetrically branched in the first wiring. And the resistor connects the two connection ports.

In the multiband antenna system according to the present invention, the Wilkinson distributor may be arranged such that the two connection ports are located close to each other with respect to a branch point of the first wiring, and the two connection ports, which are close to each other, .

In the multi-band antenna system according to the present invention, the base substrate may include one Wilkinson distributor. At this time, the Wilkinson distributor may connect the first wiring to the input port and the pair of first transmission lines to the second wiring extended from the two connection ports, respectively.

In the multi-band antenna system according to the present invention, the base substrate may include first to third Wilkinson distributors. The first wilkinson distributor has the first wiring connected to the input port and the first wirings of the second and third Wilkinson distributors respectively connected to a second wiring extended from the two connection ports. And a pair of first transmission lines are connected to a second wiring extending from two connection ports of the second Wilkinson distributor. And a pair of first to twelfth transmission lines are connected to a second wiring extending from two connection ports of the third Wilkinson distributor.

The multi-band antenna system according to the present invention divides a signal for each band transmitted and received in a broadband wireless device supporting multi-band through a branching filter, and performs beam tilting for each band through a phase changer Thereby optimizing the respective service coverage.

In addition, since the multi-band antenna system according to the present invention does not need to arrange the antenna for each band for multi-band service, there is an advantage that the number of times of antenna tuning can be reduced.

1 is a block diagram illustrating a multi-band antenna system according to a first embodiment of the present invention.
2 is a block diagram illustrating a multi-band antenna system according to a second embodiment of the present invention.
3 is a block diagram illustrating a multi-band antenna system according to a third embodiment of the present invention.
4 is an exploded perspective view showing a first example of a phase shifter applicable to a multi-band antenna system according to the present invention.
5 is a perspective view showing the phase changer of FIG.
FIGS. 6 to 8 are diagrams showing examples of use of the phase changer of FIG.
9 is a graph showing s-parameters in the 700 MHz band and the 900 MHz band of the phase shifter of FIG.
10 is a graph showing s-parameters in a 700 MHz band in a multi-band antenna system using a call-based phase shifter according to a comparative example.
11 is a graph showing s-parameters in a 700 MHz band in a multi-band antenna system using a phase shifter according to a first example of the present invention.
12 is an exploded perspective view showing a phase shifter using a Wilkinson distributor according to a second example of the present invention.
Figure 13 is an enlarged view of the Wilkinson distributor of Figure 12;
Figure 14 is a perspective view of the phase changer of Figure 12;
FIGS. 15 to 17 are diagrams showing examples of use of the phase changer of FIG.

In the following description, only parts necessary for understanding the embodiments of the present invention will be described, and the description of other parts will be omitted so as not to obscure the gist of the present invention.

The terms and words used in the present specification and claims should not be construed as limited to ordinary or dictionary meanings and the inventor is not limited to the meaning of the terms in order to describe his invention in the best way. It should be interpreted as meaning and concept consistent with the technical idea of the present invention. Therefore, the embodiments described in the present specification and the configurations shown in the drawings are merely preferred embodiments of the present invention, and are not intended to represent all of the technical ideas of the present invention, so that various equivalents And variations are possible.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

1 is a block diagram illustrating a multi-band antenna system according to a first embodiment of the present invention.

Referring to FIG. 1, a multi-band antenna system 100 according to a first embodiment of the present invention includes a broadband radiating element 10, a branching filter 20, and a plurality of phase changers 30. At this time, the wideband radiating element 10 is a radiating element supporting multi-band. The branching filter 20 is connected to the wideband radiating element 10 and branches the band-specific signal included in the multi-band. A plurality of phase shifters 30 are provided corresponding to the number of multi-bands, and perform beam tilting according to the bands-by-band signal for each band.

The multi-band antenna system 100 according to the first embodiment will be described in detail as follows.

The multiband supported by the broadband radiating element 10 includes two or more bands. The band does not mean a band that distinguishes transmission and reception in a specific band but a service band for each service provider. For example, the band includes the 800 MHz band, the 900 MHz band, the 1.8 GHz band, the 2.1 GHz band, and the 2.3 GHz band, and the multi-band includes two or more of the aforementioned bands. At this time, the broadband radiating element 10 can support two or three service bands.

The branching filter (20) branches the band-specific signal included in the multiband supported by the wideband radiating element (10). As the branching filter 20, a diplexer or a triplexer may be used. For example, if the broadband radiating element 10 supports two bands, a diplexer or a triplexer can be used as the branching filter 20. When the broadband radiating element 10 supports three bands, a triplexer can be used as the branching filter 20.

This branching filter 20 can be installed on the back side of the reflector, assuming that the broadband radiating element 10 is installed on the front face of the reflector.

At this time, the diplexer can transfer the signals coming out from two circuits (phase shifters) to one circuit (broadband radiating element) without mutual influence, or the signals coming out from one circuit (broadband radiating element) To the two circuits (phase shifters) without passing through. Such a diplexer mainly refers to a branch filter used to send and receive two signals having different frequencies at the same time. Since the diplexer can only separate two signals of which the frequency difference is clear, the low-pass filter (LBF) and the high-pass filter (HBF) through which a low-frequency signal passes are generally transmitted. High Band Filter).

The triplexer is a passive filter element that separates the three frequency bands. The triplexer incorporates low pass, band pass and high pass filters, allowing three frequencies to pass through at once.

The phase changer 30 is provided to correspond to the number of multi-bands, and performs beam tilting according to the bands of each band. When the multiband is m, the phase changer 30 includes m (m is a natural number of 2 or more) phase changers 31, 33, ..., 37. That is, the multi-band antenna system 100 according to the first embodiment includes first, second, ... , And m-th band phase shifters (31, 33, ..., 37).

As described above, the multi-band antenna system 100 according to the first embodiment divides a band-specific signal transmitted and received by the broadband RF element 10 supporting multi-band through a branching filter 20, By performing a beam tilt for each band through the phase shifter 30, thereby optimizing the respective service coverage.

Also, the multi-band antenna system 100 according to the first embodiment is advantageous in that it is not necessary to arrange the antennas for each band for multi-band services, so that it is possible to reduce the number of tuning stations of the antennas.

On the other hand, in the first embodiment, the multi-band antenna system 100 including one wideband radiating element 10 is disclosed, but the present invention is not limited thereto. For example, as shown in FIGS. 2 and 3, a multi-band antenna system 200 or 300 including a plurality of broadband RF elements 10 may be implemented.

2 is a block diagram illustrating a multi-band antenna system 200 according to a second embodiment of the present invention.

Referring to FIG. 2, the multi-band antenna system 200 according to the second embodiment is an antenna system that supports two bands, and includes a plurality of broadband radiating elements 10, a plurality of branching filters 20, And a phase changer 30.

The branching filter 20 is connected to the plurality of broadband radiating elements 10, respectively. Therefore, when the broadband radiating elements 10 are n (n is a natural number of 2 or more), n number of branching filters 20 are also used. The broadband radiating element 10 according to the second embodiment supports two bands. For example, the two bands may be the 700 MHz band and the 900 MHz band, or the 1.8 GHz band and the 2.1 GHz band. The multi-band antenna system 200 according to the second embodiment includes first, second, ... , Nth wideband radiating elements (11,13, ..., 17).

As the branching filter 20, a diplexer or a triplexer may be used. In the second embodiment, an example in which a diplexer capable of separating two bands is used as the branching filter 20 has been described. For example, the multi-band antenna system 200 according to the second embodiment includes first, second, ... , N-branch filters (21, 23, ..., 27).

The plurality of phase shifters 30 includes first and second band phase shifters 31 and 33. The first band phase changer 31 performs electrical tilting on signals included in the first band among the two bands separated by the plurality of branching filters 20. [ The second band phase changer 33 performs electrical tilting on signals included in the second band among the two bands separated by the plurality of branching filters 20. [ For example, the first band phase shifter 31 performs phase shifting for a signal in the 700 MHz band and the second band phase shifter 33 can perform phase shifting for a signal in the 900 MHz band.

Therefore, in the multi-band antenna system 200 according to the second embodiment, the signal for each band transmitted and received by the broadband RF element 10 supporting the multi-band is branched through the branching filter 20, By performing beam tilting for each band through the first and second phase shifters 31 and 33, the respective service coverage can be optimized.

FIG. 3 is a block diagram illustrating a multi-band antenna system 300 according to a third embodiment of the present invention.

3, the multi-band antenna system 300 according to the third embodiment is an antenna system that supports three bands and includes a plurality of broadband radiating elements 10, a plurality of branching filters 20, And a phase changer 30.

The branching filter 20 is connected to the plurality of broadband radiating elements 10, respectively. Therefore, when the broadband radiating element 10 is n, n number of branching filters 20 are also used. The broadband radiating element 10 according to the third embodiment supports three bands. For example, the three bands may be selected in the 800 MHz band, the 900 MHz band, the 1.8 GHz band, the 2.1 GHz band, and the 2.3 GHz band, but are not limited thereto. The multi-band antenna system 300 according to the third embodiment includes first, second, , Nth wideband radiating elements (11,13, ..., 17).

As the branching filter 20, a triplexer capable of separating three bands can be used. For example, the multi-band antenna system 300 according to the third embodiment includes first, second, , N-branch filters (21, 23, ..., 27).

The plurality of phase shifters 30 includes first to third band phase shifters 31, 33 and 35. The first band phase shifter 31 performs electrical tilting on signals included in the first band among the three bands separated by the plurality of branching filters 20. [ The second band phase changer 33 performs electrical tilting on signals included in the second band among the three bands separated by the plurality of branching filters 20. [ The third band phase shifter 35 performs electrical tilting on signals included in the third band among the three bands separated by the plurality of branching filters 20. [ For example, the first band phase changer 31 performs a phase change for a signal in the 700 MHz band, the second band phase changer 33 performs a phase change for a signal in the 900 MHz band, The baseband processor 35 can perform the phase change on the 2.1 GHz band signal.

The phase changer applicable to the multi-band antenna system according to the present invention will now be described with reference to FIGS. 4 to 17. FIG.

The phase changer 30 according to the first example will be described with reference to FIGS. 4 and 5. FIG. 4 is an exploded perspective view showing a first example of a phase changer 30 applicable to a multi-band antenna system according to the present invention. And FIG. 5 is a perspective view showing the phase changer 30 of FIG.

Referring to FIGS. 4 and 5, the phase shifter 30 according to the first example includes a base substrate 40 and a variable substrate 70.

An input port 41 and a plurality of output ports 43 are formed in the base substrate 40. The input port 41 and the plurality of output ports 43 are connected to each other via at least one Wilkinson distributor 50 A plurality of first transmission lines 60 are formed discontinuously.

The variable substrate 70 has a plurality of second transmission line paths 71 connected to the plurality of first transmission lines 60 to form a continuous transmission line TL, And the length of the transmission line TL between the input port 41 and the plurality of output ports 43 is changed.

The phase changer 30 according to the first embodiment may further include a movable member 80 that moves the variable substrate 70 with respect to the base substrate 40.

The phase changer 30 according to the first example will be described in detail as follows.

The base substrate 40 has an input port 41 and a plurality of output ports 43. The base substrate 40 includes at least one Wilkinson distributor 50 connected to the input port 41. At least one Wilkinson distributor 50 has two connection ports 55 each. A pair of first transmission lines 60 are discontinuously formed in the two connection ports 55 of the Wilkinson distributor 50 so as to be symmetrical to each other. A plurality of output ports (43) are connected to ends of the first transmission line (60) of the base substrate (40).

The variable transmission substrate 70 is movably coupled to the base substrate 40 and is connected to a second transmission line 60 which continuously connects the first transmission line 60 formed in discontinuous contact with the first transmission line 60, (71) are formed. The length of the transmission line TL between the input port 41 and the plurality of output ports 43 can be varied by superimposing the second transmission line 71 on the first transmission line 60 as the variable substrate 70 moves. .

The first transmission line 60 of the base substrate 40 and the second transmission line 71 of the variable substrate 70 are connected to each other via a flexible printed circuit board Are formed on the surfaces facing each other. That is, when the first transmission line 60 is formed on the upper surface of the base substrate 40, the second transmission line 71 is formed on the lower surface of the variable substrate 70.

The Wilkinson distributor 50 includes a first wiring 51, two connection ports 55, and a resistor 57. The first wiring 51 is connected to the input port 41. The two connection ports 55 are respectively formed in the second wiring 53 branched symmetrically from the first wiring 51. The resistor 57 connects the two connection ports 55. Since the Wilkinson distributor 50 connects the two connection ports 55 with the resistor 57, the impedance of the two connection ports 55 is matched, and the isolation between the two connection ports 55 ).

The Wilkinson distributor 50 connects the two connection ports 55 adjacent to each other with the resistor 57 around the branched point of the first wiring 51 . Accordingly, the portions of the second wiring 53 connected to the two connection ports 55 around the branch point of the first wiring 51 are symmetrical with respect to each other with respect to the branched point. For example, the portion of the second wiring 53 connected to the two connection ports 55 around the branch point of the first wiring 51 is formed in a "⊂" shape on one side and the "⊃" shape on the other side .

The phase shifter 30 according to the first example has disclosed an example including one Wilkinson distributor 50. The Wilkinson distributor 50 connects the first wiring 51 to the input port 41 and the second wiring 53 extending from the two connection ports 55 to the pair of first transmission lines 60 are connected.

A pair of first transmission lines 60 are symmetrically formed on both sides of the Wilkinson distributor 50. The first transmission line 60 includes a start transmission line 61 and an end transmission line 63, and may include a connection transmission line 65.

The start transmission line 61 is connected to the second wiring 53 extending from the connection port 55 and extends in the horizontal direction. Here, the horizontal direction is a direction perpendicular to the forming direction of the second wiring 53 connected to the starting transmission line 61.

The termination transmission line 63 is formed parallel to the starting transmission line 61 and is connected to the output port 43. [

At least one connection transmission line 65 is formed between the start transmission line 61 and the termination transmission line 63 and is formed in one of "⊃" and "⊂". For example, the connection transmission line 65 formed in the pair of first transmission lines 60 is formed such that the "⊂" type and the "⊃" form are opposed to each other.

In this case, when the first transmission line 60 does not have the connection transmission line 65, the second transmission line 71 connects the unconnected start transmission line 61 to the termination transmission line 63, And has a portion overlapping with the transmission line 61 and the termination transmission line 63.

When the first transmission line 60 has the connection transmission line 65, the second transmission line 71 is connected to the unconnected start transmission line 61, the connection transmission line 65 and the termination transmission line 63, And has a portion overlapping with the start transmission line 61, the connection transmission line 65, and the termination transmission line 63.

The variable substrate 70 is movably and physically coupled to the upper surface of the base substrate 40 on which the first transmission line 60 is formed. At this time, as a member movably fixing the variable substrate 70 to the base substrate 40, "⊂" shaped clips 90 may be used. The clip 90 is fitted to the variable substrate 70 and the base substrate 40 so as to be engaged with each other to fix the variable substrate 70 to the base substrate 40. Even if the variable substrate 70 and the base substrate 40 are fixed by the clip 90 as described above, when the force acts on the base substrate 40 and the variable substrate 70 in the direction of contact with each other, The variable substrate 70 moves. A plurality of clips 90 for fixing the base substrate 40 and the variable substrate 70 function to guide the movement of the variable substrate 70 when the variable substrate 70 is moved.

For example, in the base substrate 40, since the pair of first transmission lines 60 around the Wilkinson distributor 50 are formed in a plurality of lines in parallel in the horizontal direction, a pair of first transmission lines 60 Is formed in a shape close to a rectangular plate. Accordingly, the variable substrate 70 is also formed in a rectangular plate shape corresponding to a portion where the pair of first transmission line 60 is formed. The plurality of clips 70 are fitted and fitted to the variable substrate 70 and the base substrate 40 on both sides of the Wilkinson distributor 50 in a direction perpendicular to the direction in which the first transmission line 60 is formed .

A pair of second transmission lines 71 are formed on the lower surface of the variable substrate 70 to correspond to the pair of first transmission lines 60. The second transmission line 71 includes at least one overlap transmission line 73 having a "⊂" or "⊃" shape to connect the first transmission line 60 formed discontinuously. At this time, when the number of connection transmission lines 65 is n (n is an integer of 0 or more), the number of nested transmission lines 73 is (n + 1).

The overlap transmission line 73 has the opposite form of the connection transmission line 65. [ For example, when the connection transmission line 65 has a "⊃" form, the overlap transmission line 73 has a "⊂" form. Conversely, when the connection transmission line 65 has the form of "?, &Quot; the overlap transmission line 73 has "?. &Quot;

Therefore, when the variable substrate 70 is coupled to the base substrate 40, the first transmission line 60 and the second transmission line 71, which are formed discontinuously, respectively, are connected to the transmission line TL close to a square waveform, . The second transmission line 71 is superimposed on the first transmission line 60 in accordance with the movement of the variable substrate 70 so that the lengths of the transmission lines TL on both sides of the Wilkinson distributor 50 are different do.

As described above, the phase shifter 30 according to the first example performs the phase change using the difference in length of the pair of transmission lines TL. The amount of phase variation can be adjusted by adjusting the lengths of the first and second transmission lines 60 and 71 and the size of the phase changer 30 can be minimized even if the phase variable amount is increased .

The movable member 80 moves the variable substrate 70 relative to the base substrate 40 in a linear direction parallel to the direction in which the start transmission line 61 is formed. The moving member 80 includes a rotating shaft 81, a moving shaft 83, and a moving bar 85. The rotating shaft 81 is installed on the base substrate 40 and is rotatably installed. The movable shaft 83 is provided on the variable substrate 70. The moving bar 85 connects the rotating shaft 81 and the moving shaft 83 and moves the moving shaft 83 in a linear direction around the rotating shaft 81 by an external force.

At this time, the rotary shaft 81 may be integrally formed with the moving bar 85 and may be rotatably fixed to the hole 48 formed in the base substrate 40.

The moving shaft 83 has a guide hole 45 formed parallel to the starting transmission line 61 formed in the base substrate 40 in the horizontal direction and a hole 45 formed in the variable substrate 70 corresponding to the guide hole 45 75). As a result, the moving shaft 83 moves linearly along the guide hole 45 as the moving bar 85 is driven.

The movable member 80 may further include a dummy shaft 87 that is spaced apart from the movable shaft 83 and installed in the variable substrate 70. The dummy shaft 87 functions to guide a stable linear movement of the moving shaft 83 and can be installed as required. The dummy shaft 87 includes a dummy guide hole 49 formed in parallel with the guide hole 45 in the horizontal direction on the base substrate 40 and a dummy guide hole 49 formed in the dummy guide hole 49, And the hole 77 is connected. The dummy shaft 87 moves linearly along with the moving shaft 83 along the dummy guide hole 49 as the moving bar 85 is driven.

The rotating shaft 81, the moving shaft 83 and the dummy shaft 87 are rotatably installed on the base substrate 40 or the variable substrate 70 through the washer 91.

The moving bar 85 is coupled to the rotating shaft 81 and the moving shaft 83 and the moving bar 85 rotates around the rotating shaft 81 by a force externally applied within a predetermined angle range. The hole 85a to which the moving shaft 83 of the moving bar 85 is engaged is moved in the direction of the moving shaft 83 in consideration of the moving distance of the moving shaft 83 because the moving shaft 83 linearly moves in accordance with the rotation of the moving bar 85 . The moving bar 85 is formed so as to extend outwardly of the rotating shaft 81 on the side opposite to the side on which the moving shaft 83 is installed. A transfer bar (not shown) may be connected to the extended portion of the movable bar 85 to transmit an externally acting force. The distance between the rotation shaft 81 and the portion where the transmission bar is connected is longer than the distance between the rotation shaft 81 and the movement shaft 83 so that the movement bar 85 can be more stably rotated.

On the other hand, in the first example, the moving bar is provided on the upper portion of the variable substrate 70, but the moving bar may be provided below the base substrate.

An example of the use of the phase changer 30 according to the first example will be described with reference to FIGS. 6 to 8. FIG. Here, FIGS. 6 to 8 illustrate examples of use of the phase changer 30 of FIG. In the drawing, the pair of output ports 43 includes a first output port 43a located on the right side and a second output port 43b located on the left side. The transmission line connecting the input port 41 and the first output port 43a is denoted by TL1 and the transmission line connecting the input port 41 and the second output port 43b is denoted by TL2.

As shown in FIG. 6, when the movable bar 85 is positioned at the center, the transmission lines TL1 and TL2 connected to the first and second output ports 43a and 43b at the input port 41, respectively, The lengths are the same. In this state, the phase change does not occur.

7, when the movable bar 85 moves counterclockwise about the rotational axis 81, the variable substrate 70 moves to the left with respect to the base substrate 40. As shown in Fig.

The length of the transmission line TL1 connected to the first output port 43a is increased and the length of the transmission line TL2 connected to the second output port 43b is shortened. Is output through the first and second output ports 43a, 43b. On the contrary, the signals input to the first and second output ports 43a and 43b may be output through the input port 41 in a variable phase.

At this time, the overlapped portion between the first and second transmission lines 60 and 71 on the first output port 43a side is reduced, and the length of the transmission line TL1 is increased. On the other hand, as the overlapping portion between the first and second transmission preferences 60 and 71 on the side of the second output port 43b increases, the length of the transmission line TL2 decreases.

8, when the movable bar 85 moves clockwise about the rotation axis 81, the variable substrate 70 moves to the right with respect to the base substrate 40. As shown in Fig.

The length of the transmission line TL2 connected to the second output port 43b is increased and the length of the transmission line TL1 connected to the first output port 43a is shortened. Are output through the first and second output ports 43a and 43b. On the contrary, the signals input to the first and second output ports 43a and 43b may be output through the input port 41 in a variable phase.

At this time, the overlapped portion between the first and second transmission lines 60 and 71 on the side of the second output port 43b is reduced, and the length of the transmission line TL2 is increased. On the other hand, as the overlapping portion between the first and second transmission lines 60 and 71 on the first output port 43a side increases, the length of the transmission line TL1 is reduced.

The phase changer 30 according to the first example is configured to change the phase of the signal inputted to the phase changer 30 in accordance with the change in the length of both transmission lines TL1 and TL2 in accordance with the left- And performs phase change.

The s-parameters in the 700 MHz band and the 900 MHz band of the multi-band antenna system using the phase changer 30 according to the first example will be described with reference to FIG. Here, FIG. 9 is a graph showing s-parameters in the 700 MHz band and the 900 MHz band of the multi-band antenna system 200 of FIG.

Referring to FIG. 7, S21 indicates the degree of separation between output ports.

S21 is -17.404 dB at 698.000 MHz, -18.173 dB at 718.000 MHz, -26.709 dB at 859.000 MHz and -702 dB at 960.000 MHz. That is, since the multi-band antenna system 200 according to the second embodiment uses the phase shifter having the Wilkinson's divider, it can be confirmed that the isolation between the output ports is ensured.

In the multi-band antenna system using the phase shifter according to the first example, even if a plurality of branching filters are connected to the phase shifter, the isolation characteristics between the output ports are ensured. On the other hand, It can be confirmed that the separation characteristics between the output ports can not be secured.

10 is a graph showing s-parameters in a 700 MHz band in a multi-band antenna system using a call-based phase shifter according to a comparative example.

Referring to FIG. 10, the multi-band antenna system according to the comparative example has two branching filters installed in two output ports of a call-based phase changer, . The position A to C is the position of the rotating body in the phase shifter, the position B is the position where the rotating body is located at the center and the phase is not changed, the position A is the state in which the rotating body is moved to the right, It has been moved to the left.

In the case of connecting another component, that is, a branching filter, to the call-based phase shifter according to the comparative example, the isolation between the output ports is not ensured, and the passing characteristic of the branching filter is distorted depending on the position of the rotation- .

11 is a graph showing s-parameters in a 700 MHz band in a multi-band antenna system using a phase shifter according to a first example of the present invention.

Referring to FIG. 11, the multi-band antenna system according to the first example includes a phase shifter having one output port and one output port, and two branch filters disposed at two output ports of the phase shifter. A to C positions are shifted from the phase changer to the position of the movable bar, the position B is the position where the movable bar is located at the center and there is no phase change (Fig. 6), the position A is the state in which the movable bar is moved to the right , And C indicates that the movable bar has moved to the left (Fig. 8).

The phase changer according to the first example ensures that the separation characteristics between the output ports are secured even when the branch filters are connected so that the passing characteristics of the branch filters are not distorted depending on the position of the movable bar.

Since the phase changer 100 according to the first example connects the input port 41 and the plurality of output ports 43 using the Wilkinson distributor 50, The problem of the phase changer can be solved. That is, since the phase changer 30 uses the Wilkinson distributor 50, the separation between the output ports 43 can be ensured.

Since the phase changer 30 according to the first example only needs to increase the lengths of the first and second transmission lines 60 and 71 in order to increase the phase variable amount, Can be minimized.

Also, since the phase changer 30 according to the first example can secure the separation between the output ports 43 by using the Wilkinson distributor 50, it is not necessary to install a phase changer for each band, It can cope effectively.

The phase changer 30 according to the first embodiment can secure the separation between the output ports 43 using the Wilkinson distributor 50. Even if other components are added to the back surface of the phase changer 30, It is possible to suppress the occurrence of distortion in the intrinsic characteristics of the phase difference signal and the distortion of the phase signal.

Also, since the phase changer 30 according to the first example can secure the separation between the output ports 43 by using the Wilkinson distributor 50, even when applied to the array antenna, the amplitude and phase distortion The problem can be solved.

In the first example, a 3-port phase changer 100 is illustrated. However, when there are four branch filters 21, a 5-port phase changer 130, as shown in FIGS. 12 to 17, have.

12 is an exploded perspective view showing a phase changer 130 using Wilkinson distributors 50a, 50b and 50c according to a second example of the present invention. FIG. 13 is an enlarged view of the Wilkinson dispensers 50a, 50b, and 50c of FIG. And FIG. 14 is a perspective view showing the phase changer 130 of FIG.

12 to 14, the phase shifter 130 according to the second example is a 5-port phase changer, and includes four output ports 43a, 43b, 43c, and 43d having one input port 41 Three Wilkinson distributors 50a, 50b, and 50c for the sake of simplicity. The phase changer 130 according to the second example includes a base substrate 40 on which three Wilkinson distributors 50a, 50b and 50c are formed, a variable substrate 70a and 70b movably mounted on the base substrate 40, .

The base substrate 40 includes first to third Wilkinson distributors 50a, 50b and 50c. Since the first to third Wilkinson distributors 50a, 50b and 50c have the same structure as the Wilkinson distributor 50 according to the first example, the first to third Wilkinson distributors 50a, 50b, The description of the individual structures is omitted.

The first Wilkinson distributor 50a has a first wiring 51a connected to the input port 41 and a second wiring 53a extended from the two first connection ports 55a to the second and third Wilkinson distributors 50a, And the first wirings 51b and 51c of the distributor 50b.50c are connected. A pair of first transmission line paths 61a are connected to the second wiring lines 53b extending from the two second connection ports 55b of the second Wilkinson distributor 50b. And a pair of the first-second transmission lines 60b are connected to the second wirings 53c extending from the two third connection ports 55c of the third Wilkinson distributor 50c.

At this time, the base substrate 40 is formed with second and third Wilkinson distributors 50b and 50c facing each other with respect to the first Wilkinson distributor 50a. Two second connection ports 55b of the second Wilkinson distributor 50b are formed on one side of the direction in which the two first connection ports 51a of the first Wilkinson distributor 50a are formed and on the other side, Two third connection ports 55c of the Wilkinson distributor 50c are formed.

The variable substrates 70a and 70b include a first variable substrate 70a and a second variable substrate 70b. The first variable substrate 70a is formed with a second-1 transmission line 71a connected to the second Wilkinson distributor 50b. The second variable transmission substrate 70b is separated from the first variable substrate 70a and is symmetrically disposed with respect to the 2-1 transmission line 71a and connected to the second 2-2 transmission line 70c connected to the third Wilkinson distributor 50c. As shown in Fig. Here, the second transmission lines 71a and 71b include a 2-1 transmission line 71a and a 2-2 transmission line 71b.

The pair of first transmission line 60a is symmetrically formed on both sides of the second Wilkinson distributor 50b. The 1-1 transmission line 60a includes a first start transmission line 61a and a first end transmission line 63a, and may further include a first connection transmission line.

The first start transmission line 61a is connected to the second wire 53b extending from the second connection port 55b and extends in the horizontal direction. Here, the horizontal direction is a direction perpendicular to the forming direction of the second wiring 53b connected to the first starting transmission line 61a.

The first end transmission line 63a is formed parallel to the first start transmission line 61a and is connected to the output ports 43a and 43b.

At least one of the first connection transmission line may be formed between the first connection transmission line 61a and the first transmission transmission line 63a and may be formed in one of "⊃" and "⊂". For example, a connection transmission line formed in a pair of the first transmission line 61a is formed such that a "⊂" shape and a "⊃" shape are opposed to each other.

In this case, when the 1-1 transmission line 60a does not have the first connection transmission line, the 2-1 transmission line 71a is connected to the first connection transmission line 61a and the first connection transmission line 61a, 63a and has a portion overlapping the first start transmission line 61a and the first end transmission line 63a.

When the 1-1 transmission line 60a includes the first connection transmission line, the 2-1 transmission line 71a is connected to the first connection transmission line 61a, the first connection transmission line, Terminating transmission line 63a, and has a portion overlapping with the first starting transmission line 61a, the first connecting transmission line, and the first terminating transmission line 63a.

The pair of the first to-second transmission lines 60b are symmetrically formed on both sides of the third Wilkinson distributor 50c. The first-second transmission line 60b includes a second start transmission line 61b and a second end transmission line 63b, and may further include a second connection transmission line.

The pair of the first to twelfth transmission lines 60b are formed to be connected to the third Wilkinson distributor 50c symmetrically to the pair of the first transmission lines 60a, And is connected to the third Wilkinson distributor 50c in the same manner as the first Wilkinson distributor 50a, detailed description thereof will be omitted.

The first and second variable substrates 70a and 70b are physically and movably coupled to the upper surface of the base substrate 40 on which the 1-1 and 1-2 transmission lines 60a and 60b are formed, respectively. At this time, as a member movably fixing the variable substrate 70a, 70b to the base substrate 40, "⊂" shaped clips 90 may be used. The clip 90 is fitted to the variable substrates 70a and 70b and the base substrate 40 so as to be engaged with each other to fix the variable substrates 70a and 70b to the base substrate 40. [ Even if the variable substrates 70a and 70b and the base substrate 40 are fixed by the clip 90 in this way, when a force acts in the direction of the surface where the base substrate 40 and the variable substrates 70a and 70b are in contact with each other, The variable substrates 70a and 70b move with respect to the substrate 40. A plurality of clips 90 for fixing the base substrate 40 and the variable substrates 70a and 70b function to guide the movement of the variable substrates 70a and 70b when the variable substrates 70a and 70b move .

Since the first variable substrate 70a and the second variable substrate 70b are coupled to the base substrate 40 in the same shape, the first variable substrate 70a is coupled to the base substrate 40 Let me explain.

For example, in the base substrate 40, since the pair of first transmission line paths 60a around the second Wilkinson distributor 50b are formed in a plurality of lines in parallel in the horizontal direction, -1 transmission line 60a is formed in a shape close to a rectangular plate. Thus, the first variable substrate 70a is also formed in a rectangular plate shape corresponding to a portion where the pair of first transmission line paths 60a are formed. The plurality of clips 90 are disposed on both sides of the second Wilkinson distributor 50b in the direction perpendicular to the direction in which the first transmission line 60a is formed and the first variable substrate 70a and the base substrate 40 And are fit-engaged to fit.

Of course, the second variable substrate 70b is also mounted on the base substrate 40 so as to be connected to the 1-2 transmission line 60b of the base substrate 40 in the same manner as the first variable substrate 70a.

The first variable substrate 70a has a pair of second-1 transmission lines 71a formed on the lower surface thereof so as to correspond to a pair of the first transmission line 60a. The 2-1 transmission line 71a includes at least one first superposition transmission line 73a having a "⊂" or "⊃" shape to connect the 1st transmission line 60a formed discontinuously do. At this time, when the number of the first connection transmission lines is n (n is an integer of 0 or more), the number of the first superposition transmission line 73a is (n + 1).

The first superposition transmission line 73a has an opposite form of the first connection transmission line. For example, when the first connection transmission line has a "⊃" shape, the first superposition transmission line 73a has a "⊂" shape. On the other hand, when the first connection transmission line has the form of "?, &Quot; the first overlapping transmission line 73a has"?.

Therefore, when the first variable substrate 70a is coupled to the base substrate 40, the first-first transmission line 60a and the second-1 transmission line 71a, which are formed discontinuously, And is formed in a close form. As the first variable substrate 70a moves, the 2-1 transmission line 71a is superimposed on the 1-1 transmission line 60a and the two transmission lines TL1 and TL2 around the second Wilkinson distributor 50b , TL2) are different from each other.

When the first variable substrate 70a is coupled to the base substrate 40, the first-first transmission line 60a and the second-1 transmission line 71a, which are formed discontinuously, And is formed in a close form. As the first variable substrate 70a moves, the 2-1 transmission line 71a is superimposed on the 1-1 transmission line 60a and the two transmission lines TL1 and TL2 around the second Wilkinson distributor 50b , TL2) are different from each other.

When the second variable substrate 70b is coupled to the base substrate 40, the first to second transmission line 60b and the second to second transmission line 71b, which are discontinuously formed, And is formed in a close form. As the second variable substrate 70b moves, the second-2 transmission line 71b is superimposed on the first-second transmission line 60b and the two transmission lines TL3 , TL4) are different from each other.

Thus, the phase shifter 130 according to the second example performs the phase change using the length difference of the four pairs of transmission lines TL1, TL2, TL3, TL4. The phase variable amount can be adjusted by adjusting the lengths and the lengths of the 1-1, 1-2, 2-1 and 2-2 transmission lines 60a, 60b, 71a and 71b, The increase in the size of the phase changer 130 can be minimized.

The movable member 80 moves the first and second variable substrates 70a and 70b in a linear direction parallel to the direction in which the first start transmission line path 61a is formed with respect to the base substrate 40. [ At this time, the moving member 80 moves the first and second variable substrates 70a and 70b in directions opposite to each other.

The moving member 80 includes a rotating shaft 81, a first moving shaft 83a, a second moving shaft 83b, and a moving bar 85. The rotating shaft 81 is formed on the base substrate 40 and is rotatably installed. The first moving shaft 83a is provided on the first variable substrate 70a. And the second moving axis 83b is provided on the second variable substrate 70b. The moving bar 85 connects the rotating shaft 81 and the first and second moving shafts 83a and 83b and moves the first and second moving shafts 83a and 83b around the rotating shaft 81 by an external force, 83a, 83b in a linear direction opposite to each other.

The rotating shaft 81, the first moving shaft 83a and the second moving shaft 83b are rotatably installed on the base substrate 40 or the variable substrates 70a and 70b via a washer 91. [

The rotating shaft 81 and the first moving shaft 83a are connected to the output ports 43a, 43b, 43c and 43d so that the lengths of the transmission lines TL1, TL2, TL3 and TL4 can be varied. And the second moving shaft 83b are located on the same line, and the distances between the first and second moving shafts 83a and 83b are different from each other with respect to the rotating shaft 81 as a center.

The first moving shaft 83a has a first guide hole 45a formed in parallel with the first starting transmission line 61a formed in the base substrate 40 in the horizontal direction and a second guide hole 45b formed in parallel with the first guide hole 45a And the first hole 75a formed in the first variable substrate 70a.

The second moving shaft 83b has a second guide hole 45b formed in parallel with the second starting transmission line 61b formed in the base substrate 40 in the horizontal direction and a second guide hole 45b formed in parallel with the second guide transmission hole 61b And a second hole 75b formed in the two variable substrate 70b.

The first and second moving shafts 83a and 83b move linearly in the directions opposite to each other along the first and second guide holes 45a and 45b as the moving bar 85 is driven.

The moving bar 85 is coupled to the rotating shaft 81 and the first and second moving shafts 83a and 83b so that the moving bar 85 is rotated about the rotating shaft 81 by an external force, Lt; / RTI > The first and second moving shafts 83a and 83b of the moving bar 85 move in the opposite directions from each other because the first and second moving shafts 83a and 83b linearly move in opposite directions in accordance with the rotation of the moving bar 85, The engaging holes 85a and 85b are elongated in consideration of the moving distance of the first and second moving shafts 83a and 83b.

The moving bar 85 is installed on the second and third Wilkinson distributors 50b and 50c so as to secure a maximum moving distance between the left and right sides. The movement bar 85 in the state of no phase change can be located on the same line as the second and third Wilkinson distributors 50b and 50c. The rotating shaft 81 is also formed in one of the second and third Wilkinson distributors 50b and 50c.

The moving bar 85 rotates around the rotating shaft 81 by a force acting from the outside. The force externally acting is transmitted to the second moving shaft 83b located at a great distance about the rotating shaft 81 You can connect. Of course, the force externally acting on the first moving shaft 83a can be transmitted. In this case, since the distance between the first moving shaft 83a and the second moving shaft 83b is shorter than that between the second moving shaft 83b and the second moving shaft 83b, a force greater than the force acting on the second moving shaft 83b must be applied.

On the other hand, in the first example, the movable bar 85 is provided on the upper portion of the variable substrate 70a, but the movable bar 85 may be provided below the base substrate 40. [

The phase changer 130 according to the second example uses only three Wilkinson distributors 50a, 50b and 50c. The basic structure of the phase changer 130 is the same as that of the phase changer 30 of FIG. 5 The effect according to the phase changer (30 in Fig. 5) according to the first example can be equally expected.

An example of the use of the phase changer 130 according to the second example will be described with reference to FIGS. 15 to 17. FIG. Here, FIGS. 15 through 17 are diagrams showing examples of use of the phase changer 130 of FIG. The four output ports 43a, 43b, 43c and 43d are connected to the first and second output ports 43a and 43b located below and the third and fourth output ports 43c and 43d located above . The first and third output ports 43a and 43c are located on the left side and the second and fourth output ports 43b and 43d are located on the right side.

The length of the transmission line connected to the first to fourth output ports 43a, 43b, 43c and 43d at the input port 41 when the movable bar 85 is located at the center as shown in Fig. 15, Are the same.

16, when the movable bar 85 moves clockwise about the rotation axis 81, the first variable substrate 70a moves to the left with respect to the base substrate 40, (70b) moves to the right.

The length of the transmission line TL1 connected to the first output port 43a is increased and the length of the transmission line TL2 connected to the second output port 43b is shortened. Are output through the first and second output ports 43a and 43b. On the contrary, the signals input to the first and second output ports 43a and 43b may be output through the input port 41 in a variable phase.

At this time, the overlapped portion between the 1-1 and 2-1 transmission lines 60a and 71a on the side of the first output port 43a is reduced, and the length of the transmission line TL1 is increased. On the other hand, the length of the transmission line TL2 is reduced while the overlapping portion between the 1-1 and 2-1 transmission lines 60a and 71a on the side of the second output port 43b increases.

The length of the transmission line TL3 connected to the third output port 43c is reduced and the length of the transmission line TL4 connected to the fourth output port 43d is increased so that the signal input to the input port 41 is The phase is varied and output through the third and fourth output ports 43c and 43d. On the contrary, the signals input to the third and fourth output ports 43c and 43d may be outputted through the input port 41 with a variable phase.

At this time, the overlapped portion between the 1-2 and 2-2 transmission lines 60b and 71b on the fourth output port 43d side is reduced, and the length of the transmission line TL4 is increased. On the other hand, the length of the transmission line TL3 is reduced while the overlapping portion between the 1-2 and 2-2 transmission preferences 60b and 71b on the third output port 43c side increases.

Since the distances between the first and second moving shafts 83a and 83b are different from each other about the rotating shaft 81 so that a difference in the linear moving distance of the first and second variable substrates 70a and 70b also occurs, The lengths of the transmission lines TL1, TL2, TL3 and TL4 connected to the first to fourth output ports 43a, 43b, 43c and 43d are also different from each other. Therefore, signals input to the input port 41 can be output as signals having different phases through the first to fourth output ports 43a, 43b, 43c, and 43d.

17, when the movable bar 85 is moved counterclockwise about the rotating shaft 81, the first variable substrate 70a is moved to the right with respect to the base substrate 40, And the two variable substrate 70b moves to the left.

The length of the transmission line TL2 connected to the second output port 43b is increased and the length of the transmission line TL1 connected to the first output port 43a is shortened. Are output through the first and second output ports 43a and 43b. On the contrary, the signals input to the first and second output ports 43a and 43b may be output through the input port 41 in a variable phase.

At this time, the overlapped portion between the 1-1 and 2-1 transmission lines 60a and 71a on the side of the second output port 43a is reduced, and the length of the transmission line TL2 is increased. On the other hand, the overlap length between the 1-1 and 2-1 transmission preferences 60a and 71a on the first output port 43a side increases and the length of the transmission line TL1 is reduced.

The length of the transmission line TL4 connected to the fourth output port 43d is reduced and the length of the transmission line TL3 connected to the third output port 43c is increased so that the signal input to the input port 41 is The phase is varied and output through the third and fourth output ports 43c and 43d. On the contrary, the signals input to the third and fourth output ports 43c and 43d may be outputted through the input port 41 with a variable phase.

At this time, the overlapped portion between the 1-2 and 2-2 transmission lines 60b and 71b on the side of the third output port 43c is reduced, and the length of the transmission line TL3 is increased. On the other hand, the length of the transmission line TL4 is reduced while the overlapping portion between the 1-2 and 2-2 transmission preferences 60b and 71b on the fourth output port 43d side increases.

Since the distances between the first and second moving shafts 83a and 83b are different from each other about the rotating shaft 81 so that a difference in the linear moving distance of the first and second variable substrates 70a and 70b also occurs, The lengths of the transmission lines TL1, TL2, TL3 and TL4 connected to the first to fourth output ports 43a, 43b, 43c and 43d are also different from each other. Therefore, signals input to the input port 41 can be output as signals having different phases through the first to fourth output ports 43a, 43b, 43c, and 43d.

The phase changer 130 according to the second example is provided with the transmission lines TL1, TL2, and TL3 connected to the first to fourth output ports 43a, 43b, 43c, and 43d in accordance with the left- TL3, TL4) according to the length of the input signal.

It should be noted that the embodiments disclosed in the present specification and drawings are only illustrative of specific examples for the purpose of understanding, and are not intended to limit the scope of the present invention. It will be apparent to those skilled in the art that other modifications based on the technical idea of the present invention are possible in addition to the embodiments disclosed herein.

10: broadband radiating element 20: branch filter
30: phase changer 40: base substrate
41: input port 43: output port
43a: first output port 43b: second output port
45: guide hole 46: first guide hole
47: second guide hole 48: hole
49: Dummy guide hole 50: Wilkinson distributor
50a: first Wilkinson distributor 50b: second Wilkinson distributor
50c: third Wilkinson distributor 51: first wiring
53: second wiring 55: connection port
57: Resistor 55a: First connection port
55b: second connection port 55c: third connection port
60: first transmission line 61: starting transmission line
63: Termination transmission line 65: Connection transmission line
70: variable substrate 70a: first variable substrate
70b: second variable substrate 71: second transmission line
71a: 2nd-1st transmission line 71b: 2nd-2nd transmission line
73: overlap transmission line 75: hole
75a: first hole 75b: second hole
77: dummy hole 80: movable member
81: rotating shaft 83: moving shaft
83a: first moving shaft 83b: second moving shaft
85: Move bar 87: Dummy axis
90: Clip 91: Washer
100, 200, 300: Multiband Antenna System

Claims (11)

At least one broadband radiating element supporting multi-band;
A branching filter connected to the at least one broadband radiating element and branching the band-specific signals included in the multi-band;
And a plurality of phase shifters provided corresponding to the number of multi-bands and performing beam tilting for each band according to a branched band signal,
Wherein the phase shifter comprises:
And a plurality of first transmission lines connecting the input port and the plurality of output ports via at least one Wilkinson divider are discontinuously formed A base substrate;
A plurality of second transmission lines connected to the plurality of first transmission lines to form a continuous transmission line are formed and connected to the base substrate and connected to the transmission line between the input port and the plurality of output ports A variable substrate having a variable length;
And a moving member for moving the variable substrate in a linear direction with respect to the base substrate to vary a length of a transmission line between the input port and the plurality of output ports,
The moving member includes:
A rotating shaft formed on the base substrate and rotatably installed;
A moving shaft installed on the variable substrate;
A movement bar connecting the rotation axis and the movement axis and moving the movement axis in a linear direction about the rotation axis by an external force;
Band antenna system. The method according to claim 1,
Wherein the branching filter is a diplexer or a triplexer. 3. The method of claim 2,
If the wideband radiating element supports two bands, the branching filter is a diplexer or triplexer,
Wherein the branching filter is a triplexer when the broadband radiating element supports three bands. The method of claim 3,
If the wideband radiating element supports two bands, the phase shifter includes two phase shifters each supporting two bands,
Wherein when the broadband radiating element supports three bands, the phase shifter includes three phase shifters each supporting three bands. 5. The method according to claim 4,
A guide hole formed in parallel with the start transmission line formed in the base substrate in the horizontal direction and a hole formed in the variable substrate corresponding to the guide hole,
And the moving shaft moves linearly along the guide hole in accordance with driving of the moving bar. 6. The apparatus according to claim 5,
And a dummy shaft spaced apart from the moving axis and installed on the variable substrate,
The dummy shaft
A dummy guide hole formed in parallel with the guide hole in a horizontal direction on the base substrate and a hole formed in the variable substrate corresponding to the dummy guide hole,
And the dummy shaft is linearly moved together with the moving shaft along the dummy guide hole according to driving of the moving bar. 7. The semiconductor device according to claim 6,
At least one Wilkinson divider having an input port and a plurality of output ports and connected to the input port, the at least one Wilkinson distributor each having two connection ports, the two connection ports A first transmission line is discontinuously formed symmetrically with respect to the first transmission line, the plurality of output ports are connected to ends of the first transmission line,
The variable-
A second transmission line that is movably coupled to the base substrate and continuously connects the first transmission line formed in discontinuous contact with the first transmission line physically and is connected to the second transmission line, Wherein the length of the transmission line between the input port and the plurality of output ports is varied by overlapping the first transmission line. The apparatus of claim 7, wherein the Wilkinson distributor comprises:
A first wiring through which a signal is input;
The two connection ports each formed in a second wiring that is symmetrically branched in two in the first wiring;
A resistor for connecting the two connection ports;
Band antenna system. ≪ Desc / Clms Page number 20 > 9. The apparatus of claim 8, wherein the Wilkinson distributor comprises:
Wherein the two connection ports are located close to each other with respect to a branch point of the first wiring and the two connection ports close to each other are connected to each other by the resistor. 10. The method of claim 9,
The base substrate comprising a Wilkinson distributor,
Wherein the Wilkinson distributor has the first wire connected to the input port and the pair of first transmission lines connected to a second wire extended from the two connection ports. 10. The method of claim 9,
Wherein the base substrate comprises first to third Wilkinson distributors,
Wherein the first wilkinson distributor has the first wiring connected to the input port and the first wirings of the second and third Wilkinson distributors respectively connected to a second wiring extended from the two connection ports,
A pair of first transmission lines are connected to a second wiring extending from two connection ports of the second Wilkinson distributor,
And a pair of first to twelfth transmission lines are connected to a second wiring extending from two connection ports of the third Wilkinson distributor.

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