KR20040040347A - Antenna system for width and gain and electric tilt of antenna radiation pattern and method for controling the same - Google Patents

Abstract

PURPOSE: An antenna system for varying a width, a gain, and a tilt of an antenna radiation pattern and a controlling method thereof are provided to control the beam width of the antenna radiation pattern and the gain of the vertical beam by changing an overlapped area between an antenna feeding line and a dielectric. CONSTITUTION: An antenna system for varying a width, a gain, and a tilt of an antenna radiation pattern includes a plurality of antenna elements, a plurality of antenna feeding lines connected to the antenna elements, a plurality of dielectrics overlapped on the antenna feeding lines, and a tilt change unit for changing an overlapped area between the antenna elements and the antenna feeding lines. The tilt variation unit controls a vertical beam tilt of the radiation pattern. The antenna system further includes a fixing reflection plate(34) for fixing the antenna elements, a plurality of movable reflection plates(35a,35b) connected to both sides of the fixing reflection plate(34), and a beam width change unit for changing a tilt between the fixing reflection plate(34) and the movable reflection plate(35a,35b).

Description

ANTENNA SYSTEM FOR WIDTH AND GAIN AND ELECTRIC TILT OF ANTENNA RADIATION PATTERN AND METHOD FOR CONTROLING THE SAME}

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an antenna system, and more particularly, to an antenna system for varying the width, gain, and tilt of an antenna radiation pattern without changing the antenna, and an antenna system using the same. It relates to a control method.

In general, in a wireless communication network such as a mobile communication network or a wireless local loop (WLL), a base station is installed between an exchange station and a subscriber station, and radio signals are exchanged between the base station and the subscriber station.

The antenna system installed in the base station is an antenna system that generates a fixed beam type radiation pattern and generates a fixed beam type radiation pattern in consideration of the spatial distribution of the subscriber call. The antenna pattern is designed to have a constant width, gain, and tilt. .

In recent years, the existing mobile communication service providers have diversified their services by acquiring a business right in a frequency band other than the previously allocated frequency band. For example, many mobile operators in the 800 MHz or 900 MHz bands have additionally acquired 1800 MHz, 1900 MHz or 3 GHz business rights.

In PCS (Personal communication system), Cellular (Cellular) system and recently IMT-2000 (International Mobile Telecommunication-2000), which has been spotlighted, antenna system with different antenna characteristics is required for each network optimization. Therefore, the antenna characteristics such as the width, the gain, and the tilt of the antenna radiation pattern need to be changed in response to the change demand of the radio wave environment.

However, since the antenna characteristics of the conventional fixed beam type antenna are fixed, the antenna system of the fixed beam type should be replaced with a new antenna system manufactured with the antenna characteristics of the changed specification.

When the antenna system is replaced in this way, the service is disconnected and the replacement cost is incurred as much as the time required for the antenna replacement, and when the difficulty of the replacement operation is high, the service environment cannot be quickly changed.

On the other hand, recently, an antenna system for changing the tilt without replacing the antenna has been developed and installed in the base station. This antenna system is composed of a bracket including an antenna body (1) in which a plurality of antenna elements are built, as shown in Figures 1a and 1b, and an upper link (3) mounted at the rear of the antenna body (1) and folded in the middle portion do. The bracket is fixed to the tower pole (2). When the tilt is variable, the technician climbs the tower pole (2), loosens several bolts holding the bracket and opens the upper link (3) to open the antenna body (1) with respect to the tower pole pole (2) at a desired angle as shown in FIG. 1B. Will be adjusted. When the angle of the antenna body 1 is adjusted to the desired angle, the technician will tighten the bolt again. Such a method of adjusting the tilt mechanically involves a lot of risks because the technician has to climb the tower pole 2 directly to perform a complicated task, and also requires a lot of work time and cannot cope with the rapid change of the service environment. In particular, in mobile communication, if one base station antenna is adjusted, the base station propagation environment is not optimized, but the work optimization is very important because the network optimization efficiency is maximized only when all adjacent base stations are adjusted in conjunction. Therefore, it is difficult to try network optimization because of the long working time with the existing antenna system.

Accordingly, an object of the present invention is to provide an antenna system for varying the width, gain, and tilt of an antenna radiation pattern without changing the antenna, and a method of controlling the antenna system using the same. In providing.

1A and 1B illustrate a conventional mechanical tilt variable antenna system.

2 is a block diagram illustrating an antenna system according to an exemplary embodiment of the present invention.

3 is a view showing a fixed reflector and a movable reflector in the antenna system according to an embodiment of the present invention.

FIG. 4 is a view showing an angle change between the fixed reflector and the movable reflector shown in FIG. 3.

FIG. 5 is a diagram illustrating in detail a vertical beam width variable driver and a vertical beam tilt variable driver illustrated in FIG. 2.

FIG. 6 is a partial cutaway perspective view of the structure of the vertical beam width variable driver and the vertical beam tilt variable driver illustrated in FIG. 2.

FIG. 7A is a plan view illustrating a case where a dielectric overlap area of an antenna feed line is large in order to explain an operation principle of the vertical beam width variable driver illustrated in FIG. 2.

FIG. 7B is a cross-sectional view illustrating the overlapping area of the dielectric and the antenna feed line taken along the line 'I-I' in FIG. 7A.

FIG. 8A is a plan view illustrating a case where the overlap area of the dielectric with respect to the antenna feed line is small in order to explain the operation principle of the variable vertical beam width driver shown in FIG. 2.

FIG. 8B is a cross-sectional view illustrating the overlapping area of the dielectric and the antenna feed line taken along the line 'II-II' in FIG. 8A.

FIG. 9A is a plan view illustrating a case where a dielectric overlap area of an antenna feed line is large in order to explain an operation principle of the vertical beam tilt variable driver illustrated in FIG. 2.

FIG. 9B is a plan view illustrating a case where the overlapping area of the dielectric with respect to the antenna feed line is relatively small in order to explain the operation principle of the vertical beam tilt variable driver illustrated in FIG. 2.

FIG. 10 is a diagram illustrating tilt of an in-phase equipotential surface of an antenna radiation pattern that is varied by the vertical beam tilt variable driving unit illustrated in FIG. 2.

<Description of Symbols for Main Parts of Drawings>

1 antenna body 2 tower pole

3: link 20: antenna radiation pattern

22: vertical beam width variable drive unit 23, 27, 32: step motor

24, 28, 33: motor drive 25: remote control

26: antenna feed connector 29: vertical beam tilt variable drive unit

30: antenna feed line 31: horizontal beam width variable drive unit

34: fixed reflector 35a, 35b: movable reflector

36a, 36b, 36c, 36d: hinge 37a, 37b: rotary knob

40: dielectric 41: rack gear

1001 to 100n: antenna element 200: in-phase equipotential surface of antenna radiation pattern

In order to achieve the above object, the antenna system according to an embodiment of the present invention, a plurality of antenna elements arranged in a line, an antenna feed line connected to each of the antenna elements, and a plurality of dielectrics overlapping on the antenna feed line And a tilt variable for varying the overlapping area of the antenna elements and the dielectric.

The tilt variable unit may adjust the vertical beam tilt of the radiation pattern.

According to an embodiment of the present invention, an antenna system includes a fixed reflector on which the antenna elements are mounted, movable reflectors rotatably connected to both sides of the fixed reflector, and an angle between the fixed reflector and the movable reflector. It further comprises a beam width variable portion.

According to another embodiment of the present invention, an antenna system includes a plurality of antenna elements arranged in a line, an antenna feed line connected to each of the antenna elements, a plurality of dielectrics overlapping the antenna feed lines, and the antenna elements. A beam width variable portion for varying an overlap area of the antenna feed line and the dielectric connected to the top and bottom antenna elements for determining the beam width, and an overlap area of the antenna feed line and the dielectric connected to each of the antenna elements It has a beam tilt variable for.

The beam width variable part may include an overlapping area of a dielectric overlapping each of an antenna feed line connected to at least one antenna element adjacent to the top antenna element and an antenna feed line connected to at least one antenna element adjacent to the lowest antenna element. It is characterized by extending the beam width variable range by varying.

The beam width variable part includes a rack gear mounted with a first dielectric overlapped with an antenna feed line connected to the uppermost antenna element and a second dielectric overlapped with an antenna feed line connected to the lowest antenna element, and meshed with the rack gear. A rotary knob for linear movement is provided.

The beam width variable part overlaps a first dielectric overlapping an antenna feed line connected to each of the uppermost antenna element and at least one antenna element adjacent thereto and an antenna feed line connected to each of the lowest antenna element and at least one antenna element adjacent thereto. And a rack gear on which a second dielectric is mounted, and a rotary knob engaged with the rack gear to linearly move the rack gear.

The beam tilt variable unit includes a rack gear mounted with a plurality of dielectrics overlapping the antenna feed lines connected to each of the antenna elements, and a rotary knob engaged with the rack gear to linearly move the rack gear.

The antenna system according to another embodiment of the present invention further includes an input terminal feed line for supplying a high frequency signal power to an antenna feed line overlapping a dielectric placed at the center among the plurality of dielectrics.

An antenna system according to another embodiment of the present invention further includes a motor for rotating the rack gear.

The antenna feed line overlapping the antenna element includes a bent portion overlapping the dielectric and bent in any one of a 'U' and 'W' shape.

The antenna element is characterized in that the double polarization antenna element.

The dielectric is characterized by having a dielectric constant of 1 or more.

The dielectric is characterized in that it comprises polytetrafluoroethylene (polytetrafluoroethylene).

According to another aspect of the present invention, an antenna system includes a fixed reflector on which the antenna elements are mounted, movable reflectors rotatably connected to both sides of the fixed reflector, and an angle between the fixed reflector and the movable reflector. It further comprises a second beam width variable for.

According to an embodiment of the present invention, a method of controlling an antenna system includes overlapping a plurality of dielectrics on an antenna feed line connected to a plurality of antenna elements arranged in a line, and overlapping an area of the antenna elements with the dielectric. Adjusting the tilt of the antenna radiation pattern radiated from the antenna elements by varying.

Adjusting the tilt is characterized in that for adjusting the vertical beam tilt of the antenna radiation pattern.

In a control method of an antenna system according to an embodiment of the present invention, the beam width of the antenna radiation pattern is adjusted by varying an angle between a fixed reflector on which the antenna elements are mounted and movable reflectors rotatably connected to both sides of the fixed reflector. It further comprises the step.

According to another aspect of the present invention, there is provided a method of controlling an antenna system, the method including: overlapping a plurality of dielectrics on an antenna feed line connected to each of a plurality of antenna elements arranged in a line; Adjusting a beam width of an antenna radiation pattern radiated from the antenna elements by varying an overlapping area of the top and bottom antenna elements and the dielectric, and an overlapping area of the antenna elements and the dielectric connected to each of the antenna elements. And adjusting the tilt of the antenna radiation pattern.

The control method of an antenna system according to another exemplary embodiment of the present invention further includes supplying high frequency signal power to an antenna feed line overlapping a dielectric positioned at a center among the plurality of dielectrics.

According to another aspect of the present invention, a method of controlling an antenna system includes: an antenna feed line connected to at least one antenna element adjacent to the top antenna element; and an antenna connected to at least one antenna element adjacent to the lowest antenna element. The method may further include expanding a beam width variable range by varying an overlapping area of a dielectric overlapping each of the feed lines.

The adjusting of the beam width of the antenna radiation pattern may include adjusting the vertical beam width of the antenna radiation pattern, and the adjusting of the tilt of the antenna radiation pattern may include adjusting the vertical beam tilt of the antenna radiation pattern.

According to another aspect of the present invention, there is provided a control method of an antenna system, wherein a horizontal beam width of an antenna radiation pattern is varied by varying an angle between a fixed reflector on which the antenna elements are mounted and movable reflectors rotatably connected to both sides of the fixed reflector. Further comprising the step of adjusting.

Hereinafter, exemplary embodiments of the present invention will be described with reference to FIGS. 2 to 10.

2 and 3, an antenna system according to an exemplary embodiment of the present invention includes n antenna elements 1001 to 100n arranged vertically and an antenna feed line 30 connected to the antenna elements 1001 to 100n. And a vertical beam width variable driver 22, a first step motor 23 and a first motor driver 24 for varying the vertical beam width of the antenna radiation pattern, and a vertical beam for varying the vertical beam tilt of the antenna radiation pattern. The tilt variable drive unit 29, the second step motor 27 and the second motor drive unit 28, the horizontal beam width variable drive unit 31, the third step motor 32 for varying the horizontal beam width of the antenna radiation pattern and The 3rd motor drive part 33 and the remote control part 25 for controlling the 1st thru | or 3rd motor drive parts 24, 28, and 33 remotely are provided.

The antenna elements 1001 to 100n are implemented by dipole antenna element Yagi antenna element, logarithmic antenna element, periodic antenna element, planar antenna element, double polarization antenna element and the like and are installed on the fixed reflector 34. The vertical beam width is varied by the phase change of the first antenna element 1001 disposed at the top of the antenna elements 11 to 1n and the n-th antenna element 100n disposed at the bottom. Also, the tilt angles of the antenna elements 1001 to 100n vary in the phase propagation plane of the vertical beam according to the phase difference of the high frequency signal power RF applied to the antenna elements 1001 to 100n.

On both sides of the fixed reflector 34, movable reflectors 35a, 35b are rotatably provided via hinges 36a, 36b, 36c, 36d. The movable reflectors 35a and 35b are rotated by the horizontal beam width variable driver 31 to change the angle with the fixed reflector 34. The horizontal beam width of the antenna radiation pattern varies with the rotation angles of the movable reflecting plates 35a and 35b.

The antenna feed line 30 is connected to the antenna elements 1001 to 100n to supply high frequency signal power to the antenna elements 1001 to 100n. An antenna feed connector 26 is connected to the antenna feed line 30. The antenna feed connector 26 is connected to a main feed cable of a base station (not shown) to supply high frequency signal power (RF) from the base station to the antenna feed line 30.

The vertical beam width variable driver 22 is a high frequency signal power RF applied to the first antenna element 1001 disposed at the top of the antenna elements 1001 to 100n and the nth antenna element 100n disposed at the bottom thereof. By causing the phase change, the vertical beam width of the antenna radiation pattern is varied.

The vertical beam tilt variable driver 29 varies the vertical beam tilt of the antenna radiation pattern by causing a phase change of the high frequency signal power RF applied to each of the antenna elements 1001 to 100n.

The horizontal beam width variable driver 31 varies the horizontal beam width of the antenna radiation pattern by varying the angle of the reflector of the antenna.

The first step motor 23 rotates the rotary knob 37a of the vertical beam width variable driver 22 to automate the driving of the vertical beam width variable driver 22.

The second step motor 27 rotates the rotary knob 37b of the vertical beam tilt variable driver 29 to automate the driving of the vertical beam tilt variable driver 29.

The third step motor 32 rotates the rotary knobs of the hinges 36a, 36b, 36c, and 36d for rotating the reflector plates of the horizontal beam width variable driver 31 to automate the driving of the horizontal beam width variable driver 31.

The first motor driver 24 drives the first step motor 23 under the control of the remote controller 25. The second motor driver 28 drives the second step motor 27 under the control of the remote controller 25. The third motor driver 33 drives the third step motor 32 under the control of the remote controller 25.

The remote control unit 25 controls the vertical beam width, the vertical beam tilt, or the horizontal beam width of the antenna radiation pattern at a remote location in response to a command from an operator or execution of a preset program. For this purpose, the remote controller 25 inputs a memory in which the vertical / horizontal beamwidth data and the vertical beam tilt data are stored, a program for adjusting the vertical / horizontal beamwidth and the vertical beam tilt adjustment, and inputs data or commands from the operator. It includes a receiving input device and an output device for outputting the current state of the antenna system.

4 is a cross sectional view showing a change in angle between the fixed reflector 34 and the movable reflectors 35a, 35b. The angle? Between the fixed reflector 24 and the movable reflectors 35a, 35b and the horizontal beamwidth of the antenna radiation pattern are proportionally inversely proportional to the gain of the horizontal beam. That is, as the angle θ between the fixed reflector 24 and the movable reflectors 35a and 35b increases, the horizontal beam width of the antenna radiation pattern increases and the gain of the horizontal beam decreases, while the fixed reflector 24 and the movable reflector As the angle θ between 35a and 35b decreases, the horizontal beam width of the antenna radiation pattern decreases and the gain of the horizontal beam increases.

FIG. 5 is a plan view illustrating an antenna system in which six polarized wave antenna elements 1001 to 1006 are arranged in a line, a beam width variable driver 22, and a beam tilt variable driver 29 connected to the antenna system.

Referring to FIG. 5, each of the double polarized antenna elements 1001 to 1006 of the antenna system according to an embodiment of the present invention generates first and third antenna element pieces 100a that generate +45 degree polarization (or horizontal polarization). , 100d) and second and fourth antenna element pieces 100b and 100c for generating -45 degree polarization (or vertical polarization).

In the double polarized antenna elements 1001 to 1006, the first to fourth antenna element pieces 100a to 100d are arranged in a quadrilateral shape. The first and third antenna element pieces 100a and 100d are arranged on two sides opposite to each other in a quadrilateral, and are connected to an antenna feed line (not shown) supplied with +45 degree polarization, respectively. The second and fourth antenna element pieces 100b and 100c are arranged to face each other between the first and third antenna element pieces 100a and 100d and are connected to an antenna feed line 30 to which a -45 degree polarization is supplied. . The double polarized antenna elements 1001 to 1006 have little interference between the vertical polarization and the horizontal polarization of the antenna radiation pattern 20 as compared with other types of antenna elements.

Each of the variable beam width driver 22 for varying the vertical beam width of the antenna radiation pattern and the variable beam tilt variable driver 29 for varying the inclination angle (tilt) with respect to the vertical beam in-phase propagation plane of the antenna radiation pattern are illustrated in FIGS. 6, the rotary knobs 37a and 37b, the rack gears 41 engaged with the rotary knobs 37a and 37b, and the dielectric 40 mounted to the rack gears 41 are provided. On the surfaces of the rotary knobs 37a and 37b, a gear train twisted in the form of a right screw or a left screw is formed. The rotary knobs 37a and 37b are connected to the rotary rods of the first and second step motors 23 and 27 and rotated in the same direction as the rotation of the first and second step motors 23 and 27, thereby providing rack gears ( 41) will be linear movement. The rack gear 41 linearly moves in conjunction with the rotation of the rotary knobs 37a and 37b to linearly move the dielectric 40 to the left or the right.

The dielectric 40 overlaps the antenna feed line 30 with an air layer therebetween, and includes a material having a dielectric constant of 1 or more. For example, the dielectric 40 includes polytetrafluoroethylene (trade name 'Teflon'). The dielectric 40 linearly moves together with the rack gear 41 to change the overlapping area overlapping the antenna feed line 30. The antenna feed line 30 has a bent portion bent in a 'U' or 'W' shape at a portion overlapping the dielectric 40 so that the antenna feed line 30 having a relatively long length overlaps the dielectric 40. 30a) is formed. Since the bent portion 30a of the antenna feed line 30 only needs to overlap with the dielectric 40, the bent portion 30a is not limited to the 'U' or 'W' shape, but may not be bent or bent in another form as in the prior art. Of course.

A change in the vertical beam width by the vertical beam width variable driver 22 will be described below with reference to FIGS. 7A to 8B.

7A and 8A overlap the antenna feed line 30 respectively connected to the first antenna element piece 100a of the first antenna element 1001 and the third antenna element piece 100c of the last antenna element 1006. The overlap width change of the dielectric 40 is shown. FIG. 7B illustrates a cross section of the antenna feed line 30 and the dielectric 40 in the line 'I-I' when the antenna feed line 30 and the dielectric 40 overlap as shown in FIG. 7A. FIG. 8B illustrates a cross section of the antenna feed line 30 and the dielectric 40 in the line 'II-II' when the antenna feed line 30 and the dielectric 40 overlap as shown in FIG. 8A.

When the rack gear 41 linearly moves to one side in association with one-side rotation of the rotary knob 37a, the first antenna element 100a of the first antenna element 1001 and the third of the last antenna element 1006 are rotated. The overlap area ΔOvl between the antenna feed line 30 and the dielectric 40 respectively connected to the antenna element piece 100c is increased as shown in Figs. 7A and 7B. When the overlap area ΔOvl with the dielectric 40 increases, the first antenna element piece 100a of the first antenna element 1001 and the third antenna element of the last antenna element 1006 are passed through the antenna feed line 30. The phase delay amount of the high frequency signal power supplied to each of the pieces 100c becomes large, and thus the traveling speed of the vertical beams radiated from the antenna elements 1001 and 1006 is lowered. As a result, the gain of the vertical beam is reduced as the vertical beam width of the antenna radiation pattern 20 becomes larger and the vertical beam width becomes larger.

On the contrary, when the rack gear 41 linearly moves to the other side in association with the rotation of the rotary knob 37a in the other direction, the first antenna element 100a and the last antenna element 1006 of the first antenna element 1001 are rotated. The overlap area ΔOvl between the antenna feed line 30 and the dielectric 40 respectively connected to the third antenna element piece 100c in is reduced as shown in FIGS. 8A and 8B. When the overlap area ΔOvl with the dielectric 40 is reduced in this manner, the first antenna element piece 100a of the first antenna element 1001 and the third antenna element of the last antenna element 1006 via the antenna feed line 30. The amount of phase delay of the high frequency signal power supplied to each of the pieces 100c is reduced, so that the traveling speed of the vertical beams radiated from the antenna elements 1001 and 1006 is increased. As a result, the gain of the vertical beam increases as the vertical beam width of the antenna radiation pattern 20 becomes smaller and the vertical beam width becomes smaller.

Meanwhile, the vertical beam width variable driver 22 may include an antenna feed line 30 connected to at least one other antenna element adjacent to the first antenna element 1001 and at least one other antenna adjacent to the last antenna element 1006. The variable area of the vertical beam width may be extended by varying an overlapping area of the dielectric 40 overlapping each of the antenna feed lines 30 connected to the device.

9A to 10, the change of the vertical beam tilt by the vertical beam tilt variable driver 29 will be described below. 9A and 9B show the variation in the overlap width of the dielectric 40 overlapping the antenna feed line 30 respectively connected to all antenna elements 1001 to 1006 in FIG. 5. FIG. 10 illustrates the vertical beam tilt of the antenna radiation pattern 20 when the overlap area of the dielectric 40 with respect to the antenna feed line 30 is changed as shown in FIGS. 9A and 9B.

When the rack gear 41 linearly moves to one side in association with one-side rotation of the rotary knob 37a, the left side of the antenna feed line 30 overlapped with the center dielectric 40 as shown in Figs. 9A and 9B. The overlap area of is reduced than the overlap area on the right. As a result, the equi-phase propagation surface 200 of the antenna radiation pattern 20 radiated from the third antenna element 1003 and the fourth antenna element 1004 is tilted by θ. At this time, the equi-phase propagation surface 200 of the antenna radiation pattern 20 is tilted by + θ in the third antenna element 1003 and -θ in the fourth antenna element 1004. At the same time, the antenna feed line 30 for supplying the high frequency signal power RF to the second antenna element 1002 and the fifth antenna element 1005 overlaps the two dielectrics 40. The antenna feed line 30 for supplying the high frequency signal power RF to the first antenna element 1001 and the sixth antenna element 1006 overlaps with three dielectric layers 40. Therefore, the high frequency signal power RF supplied to the second antenna element 1002 and the fifth antenna element 1005 is delayed by two times as compared with the third antenna element 1003 or the fourth antenna element 1004. The high frequency signal power RF supplied to the first antenna element 1001 and the sixth antenna element 1006 is delayed by three times as compared with the third antenna element 1003 or the fourth antenna element 1004. do. Therefore, the tilt angle of the equi-phase propagating surface 200 of the antenna radiation pattern 20 radiated from the antenna elements 1001 to 1006 is adjusted according to the overlapping area of the dielectric 40.

Table 1 below shows simulation results of the antenna system according to the embodiment of the present invention. The antennas selected as specimens in the simulation were placed 12 antenna elements vertically for generating vertical beams.

Vertical beam width [degrees] Vertical tilt [degrees] Device phase [degrees] Element 1 Element 2 Element 3 Element 4 Element 5 Element 6 Element 7 Element 8 Element 9 Element 10 Element 11 Element 12 9.5 0 0 0 0 0 0 0 0 0 0 0 0 0 3 45 45 30 30 10 10 -10 -10 -30 -30 -45 -45 6 95 95 54 54 18 18 -18 -18 -54 -54 -95 -95 12 0 105 0 0 0 0 0 0 0 0 0 0 105 3 150 45 30 30 10 10 -10 -10 -30 -30 -45 62 6 200 95 54 54 18 18 -18 -18 -54 -54 -95 10 14 0 135 0 0 0 0 0 0 0 0 0 0 135 3 180 45 30 30 10 10 -10 -10 -30 -30 -45 90 6 230 95 54 54 18 18 -18 -18 -54 -54 -95 40

As can be seen from Table 1, if the phase delay value of the first antenna element (element 1) arranged at the top and the phase delay value of the twelfth antenna element (element 12) arranged at the bottom are different, the phase delay is The vertical beam width of the antenna radiation pattern 20 changes to 9.5 degrees, 12 degrees, 14 degrees, etc. according to the difference in the value. Also, when the phase increases in the + direction toward the left side and increases in the-direction toward the right side with respect to the sixth and seventh antenna elements (elements 6 and 7), the vertical beam tilt of the antenna radiation pattern 20 is performed. Is changed to 0 degrees, 3 degrees, 6 degrees, or the like.

As described above, the antenna system for varying the width, the gain, and the tilt of the antenna radiation pattern according to the embodiment of the present invention, and the method of controlling the antenna system using the same, the highest stage of determining the vertical beam width among the antenna elements arranged in a line The dielectric beam is superimposed on the antenna feed line connected to the antenna element of the antenna element and the lowest antenna element and the overlap area is changed to adjust the vertical beam width and the gain of the vertical beam of the antenna radiation pattern. In addition, according to an embodiment of the present invention, an antenna system for varying the width, gain, and tilt of an antenna radiation pattern, and a method of controlling the antenna system using the antenna system may include a dielectric on an antenna feed line connected to each of the antenna elements arranged in a line. By overlapping and changing the overlap area, the vertical beam tilt of the antenna radiation pattern is adjusted. In addition, according to an embodiment of the present invention, an antenna system for varying the width, gain, and tilt of an antenna radiation pattern, and a method of controlling the antenna system using the antenna system may rotate the reflector on both sides of the fixed reflector and the fixed reflector on which the antenna element is mounted. By separating the movable reflector and changing the angle between the movable reflector and the fixed reflector, the gain of the horizontal beam width and the horizontal beam of the antenna radiation pattern is adjusted. As a result, the antenna system for varying the width, gain, and tilt of the antenna radiation pattern according to the present invention, and the method of controlling the antenna system using the same according to the present invention, the antenna at a minimum time without having to replace the antenna when the antenna characteristic change request Because the characteristics can be changed, it is possible to quickly cope with changes in service environment and to implement an antenna necessary for network optimization. Furthermore, since the antenna system of the present invention has a vertical beam width variable function and a tilt variable function at the same time, it is possible to implement various antenna characteristics required for network optimization.

Those skilled in the art will appreciate that various changes and modifications can be made without departing from the technical spirit of the present invention. Therefore, the technical scope of the present invention should not be limited to the contents described in the detailed description of the specification but should be defined by the claims.

Claims (23)

A number of antenna elements arranged in a line, An antenna feed line connected to each of the antenna elements; A plurality of dielectrics superimposed on the antenna feed line; And a tilt variable for varying the overlapping area of the antenna elements and the dielectric. The method of claim 1, And the tilt variable unit adjusts the vertical beam tilt of the radiation pattern. The method of claim 1, A fixed reflector on which the antenna elements are mounted; Movable reflecting plates rotatably connected to both sides of the fixed reflecting plate; And a beam width variable portion for varying an angle between the fixed reflector and the movable reflector. A number of antenna elements arranged in a line, An antenna feed line connected to each of the antenna elements; A plurality of dielectrics superimposed on the antenna feed line; A beam width variable part for varying an overlapping area of the antenna feed line and the dielectric connected to the top and bottom antenna elements for determining the beam width among the antenna elements; And a beam tilt variable for varying an overlapping area of the antenna feed line and the dielectric connected to each of the antenna elements. The method of claim 4, wherein The beam width variable portion, The beam width is varied by varying an overlapping area of an antenna feed line connected to at least one antenna element adjacent to the top antenna element and a dielectric overlapping each of the antenna feed lines connected to at least one antenna element adjacent to the lowest antenna element An antenna system characterized by extending the range. The method of claim 4, wherein The beam width variable portion, A rack gear mounted with a first dielectric superimposed on an antenna feed line connected to the uppermost antenna element and a second dielectric superimposed on an antenna feed line connected to the lowest antenna element; And a rotary knob engaged with the rack gear to linearly move the rack gear. The method of claim 5, wherein The beam width variable portion, A first dielectric overlapping an antenna feed line connected to each of the uppermost antenna element and at least one antenna element adjacent thereto and a second dielectric overlapping an antenna feed line connected to each of the lowest antenna element and at least one antenna element adjacent thereto Mounted rack gear, And a rotary knob engaged with the rack gear to linearly move the rack gear. The method of claim 4, wherein The beam tilt variable unit, A rack gear mounted with a plurality of dielectrics superimposed on an antenna feed line connected to each of the antenna elements; And a rotary knob engaged with the rack gear to linearly move the rack gear. The method of claim 4, wherein And an input terminal feed line for supplying high frequency signal power to an antenna feed line overlapping with a dielectric positioned at the center of the plurality of dielectrics. The method according to any one of claims 6 to 8, And a motor for rotating the rack gear. The method of claim 4, wherein The antenna feed line overlapping the antenna element, And a bent portion overlapping the dielectric and bent in one of 'U' and 'W' shapes. The method of claim 4, wherein And the antenna element is a double polarization antenna element. The method of claim 4, wherein And the dielectric has a dielectric constant of 1 or more. The method of claim 13, And said dielectric comprises polytetrafluoroethylene. The method of claim 14, A fixed reflector on which the antenna elements are mounted; Movable reflecting plates rotatably connected to both sides of the fixed reflecting plate; And a second beamwidth variable portion for varying an angle between the fixed reflector and the movable reflector. Superimposing a plurality of dielectrics on an antenna feed line connected to each of the plurality of antenna elements arranged in a line; And adjusting the tilt of the antenna radiation pattern radiated from the antenna elements by varying the overlapping area of the antenna elements and the dielectric. The method of claim 16, Adjusting the tilt is a control method of the antenna system, characterized in that for adjusting the vertical beam tilt of the antenna radiation pattern. The method of claim 16, And adjusting a beam width of the antenna radiation pattern by varying an angle between the fixed reflector on which the antenna elements are mounted and the movable reflectors rotatably connected to both sides of the fixed reflector. Control method. Superimposing a plurality of dielectrics on an antenna feed line connected to each of the plurality of antenna elements arranged in a line; Adjusting a beam width of an antenna radiation pattern radiated from the antenna elements by varying an overlapping area of the top and bottom antenna elements and the dielectric for determining the beam width among the antenna elements; And controlling the tilt of the antenna radiation pattern by varying an overlapping area of the antenna elements and the dielectric connected to each of the antenna elements. The method of claim 19, And supplying high frequency signal power to an antenna feed line overlapping a dielectric positioned at a center among the plurality of dielectrics. The method of claim 19, The beam width is varied by varying an overlapping area of an antenna overlapping the antenna feed line connected to at least one antenna element adjacent to the top antenna element and the antenna feed line connected to at least one antenna element adjacent to the lowest antenna element And extending the range. The method of claim 19, Adjusting the beam width of the antenna radiation pattern is to adjust the vertical beam width of the antenna radiation pattern, Adjusting the tilt of the antenna radiation pattern control method of the antenna system, characterized in that for adjusting the vertical beam tilt of the antenna radiation pattern. The method of claim 19, And adjusting a horizontal beam width of the antenna radiation pattern by varying an angle between the fixed reflector on which the antenna elements are mounted and the movable reflectors rotatably connected to both sides of the fixed reflector. Control method.