KR101240353B1 - Array circularly polarized antenna and method for manufacturing thereof in a wireless communication system - Google Patents

Abstract

The present invention relates to an array circular polarization antenna which generates a high gain circular polarization using a superstrate in a wireless communication system, and a method of manufacturing the array circular polarization antenna of the present invention. A feed antenna positioned at a predetermined point on a dielectric substrate on a substrate, a unit antenna in which a plurality of conductive structures are arranged in the same predetermined direction on an upper cover spaced apart from the ground substrate by a predetermined distance on the feed antenna, and the unit A plurality of antennas include an array antenna arranged in sequence so as to have a predetermined phase difference, and when the feed antenna emits linearly polarized light, the plurality of conductive structures, the unit antenna, and the array antenna, respectively, circular polarization Radiate.

Array antenna, circular polarization, top cover, high gain

Description

Array circularly polarized antenna and method for manufacturing in a wireless communication system

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a wireless communication system, and more particularly, to an array circular polarization antenna for generating a high gain circular polarization using a superstrate in a wireless communication system and a method of manufacturing the array circular polarization antenna.

Various types of antennas have been proposed for transmitting and receiving signals in a wireless communication system, and among these antennas, patch antennas are not only compact in size, but also lightweight, simple in manufacturing process, and low in cost. However, such a patch antenna has a disadvantage in that it is difficult to widen the bandwidth and is difficult to use in a high frequency band because it induces a large coupling loss.

In addition, a circular polarization antenna which is mainly used in a wireless communication system is implemented using a patch antenna, and various methods have been proposed to further improve the gain of a circular polarization antenna using a patch antenna. In particular, as a method for improving the gain of the circularly polarized antenna using the patch antenna, there is a method of increasing the number of arrays of antennas generating circular polarization by arranging a plurality of patch antennas or a plurality of circular polarized antennas.

However, the scheme of increasing the number of arrays of antennas described above increases the energy loss due to the feeding of the antennas to the arrayed antennas in proportion to the number of feeds to the arrayed antennas, thereby reducing the overall efficiency of the antennas. There is a problem. In addition, in order to obtain an appropriate gain and axial ratio required for the antenna from such a decrease in efficiency, it is necessary to finely adjust the feeding length, the arrangement interval, and the like to each of the arranged antennas, thereby increasing the complexity of the antenna and Due to the complicated structure, it is difficult to implement an antenna.

Accordingly, an object of the present invention is to provide an array circular polarized antenna having a high gain in a wireless communication system and a method of manufacturing the array circular polarized antenna.

Another object of the present invention is to provide an array circular polarized antenna having a high gain and simplifying the structure of the antenna using a patch antenna in a wireless communication system, and a method of manufacturing the array circular polarized antenna.

Another object of the present invention is to provide an array circular polarized antenna and a method of manufacturing the array circular polarized antenna, which can be easily designed with a high gain with a small number of feed antennas using a top cover in a wireless communication system. Is in.

In addition, another object of the present invention, using a top cover and a patch antenna in a wireless communication system to minimize the complexity of the antenna while easy to implement the antenna of the high gain array circular polarized antenna and the method of manufacturing the array circular polarized antenna In providing.

An apparatus of the present invention for achieving the above objects, an array circular polarization antenna, comprising: a feed antenna positioned at a predetermined point on a dielectric substrate on a ground substrate; A unit antenna in which a plurality of conductive structures are arranged in the same predetermined direction on a superstrate which is spaced apart from the ground substrate by a predetermined distance on an upper portion of the feeding antenna; And an array antenna sequentially arranged such that the plurality of unit antennas have a predetermined phase difference. When the feed antenna emits linear polarization, the plurality of conductive structures, the unit antenna, and the array antenna are circular. It is characterized by radiating polarized waves respectively.

A method of the present invention for achieving the above objects, the method comprising the steps of: forming a first dielectric substrate on a ground substrate; Forming a feed antenna at a predetermined point on the first dielectric substrate; Positioning a second dielectric substrate on the power supply antenna spaced apart from the ground substrate by a predetermined distance; Arranging a plurality of conductive structures on the second dielectric substrate in the same predetermined direction; And sequentially arranging a plurality of second dielectric substrates on which the plurality of conductive structures are arranged to have a predetermined phase difference. When the linear polarization is emitted from the feed antenna, the plurality of conductive structures, the plurality of conductive structures In the second dielectric substrate in which the conductive structures are arranged, and the plurality of second dielectric substrates in the sequential order, circular polarizations are respectively radiated.

The present invention can easily implement an array circular polarized antenna having a high gain with a small number of feed antennas using a top cover and a patch antenna in a wireless communication system and having a simplified antenna structure. In addition, the present invention, by placing a plurality of patches of a conductive structure on the top of the antenna, it is possible to generate an array circular polarized antenna simply by one feeding antenna (source source), it is possible to improve the efficiency and gain of the antenna at the same time have. In addition, the present invention can improve the antenna gain, the axial ratio, and the 3dB axial ratio bandwidth by sequentially arranging the high gain array circular polarization antennas designed in this way, and accordingly, when the existing high gain circular polarization sequential array antenna technique is used. The power supply structure can be simplified to minimize the complexity of the antenna design.

In addition, the present invention can minimize the antenna supply power loss, thereby improving the efficiency of the antenna. In addition, in the case of the conventional sequential array antenna, since the gain of the individual patch antenna constituting the sequential array antenna is about 6 dB, the high gain characteristic of 24 dB should be composed of 64 individual antennas. Since the gain has 17.05dB, only four unit antennas can be arranged sequentially to achieve high gain of 22.61dB, improving both the axial and 3dB axial bandwidth.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. It should be noted that in the following description, only parts necessary for understanding the operation according to the present invention will be described, and descriptions of other parts will be omitted so as not to distract from the gist of the present invention.

The present invention proposes a high gain array circular polarization antenna and a method of manufacturing the array circular polarization antenna in a wireless communication system. In an embodiment of the present invention, a circular polarization antenna is implemented by sequentially arranging an antenna structure in which a plurality of patches, which are periodically arranged conductive structures, are attached to an upper portion of a feed antenna including a ground plane. Here, the circularly polarized antenna, the plurality of patches of the conductive structure generates a circular polarization, the antenna gain is increased by periodically arranging the conductive structure, the circularly polarized antenna is formed by the periodically arranged structure In addition, a left handed polarized wave and a right-handed polarized wave are implemented according to the polarization radiated from the feeding antenna, and the gain structure and the ratio of the antenna are arranged by sequentially arranging the arranged conductive structure and the feeding antenna. Improves the 3dB axis ratio bandwidth.

In an embodiment of the present invention, a high gain circular flat panel array antenna using a superstrate is proposed. Here, in the embodiment of the present invention, a plurality of conductive structures that generate circular polarization, that is, a plurality of patches arranged in any particular shape and spacing to be positioned on top of the feed antenna including a ground plane, one feed A high gain circularly polarized antenna is implemented using only the antenna. In addition, according to an embodiment of the present invention, the left polarization and the excellent polarization are implemented according to the characteristics of the linear polarization generated by the feed antenna, and the high gain circular polarization antenna having the upper cover is arranged in order to sequentially arrange the antennas. It not only improves the gain, but also improves the 3dB bandwidth of the axial ratio and axial ratio. Accordingly, the present invention simplifies the complexity of the feed line generated in the circularly polarized antenna of the array antenna structure using a general patch antenna, reduces the loss caused by the feed line, and improves the efficiency of the antenna. Left polarization and even polarization are implemented according to the direction of the sequential array.

In addition, the high gain array circular polarization antenna using the top cover according to an embodiment of the present invention, the structure is arranged in a plurality of patches, which is simply any conductive structure is located on top of the feed antenna including the ground plane circular polarization In this case, the conductive structure generates left and right polarization and good polarization according to the characteristics of linear polarization, that is, x-polarized and y-polarized wave generated in the feed antenna, thereby increasing the antenna gain. Here, the antenna gain is increased as the area of the top cover is increased, and four circularly polarized antennas each including the top cover are sequentially arranged with a phase difference of 90 °, thereby further improving the antenna gain, and the antenna ratio and 3dB. The axial ratio bandwidth is improved. In this case, when four circularly polarized antennas including the upper cover are sequentially arranged, the antennas having left polarization are aligned in the counterclockwise direction and the antennas having even polarization are aligned in clockwise direction according to the feeding antenna of the circularly polarized antenna. do. That is, the present invention sequentially arranges the four circularly polarized antennas with a phase difference of 90 degrees in the counterclockwise and clockwise directions, thereby improving the antenna gain and the 3dB axial ratio bandwidth while further improving the antenna gain.

In addition, the array circular polarization antenna according to the embodiment of the present invention improves the unit antenna gains from the patch antenna through a different arrangement from the conventional array antenna using a conventional patch, and thus uses a smaller number of feed antennas. Acquire a high gain circularly polarized antenna. For example, since the gain of a typical patch antenna is 6 dB, at least 64 patch antennas should be arranged to obtain an antenna gain of 24 dB. However, since the gain of the unit antenna is 17 dB, the array circular polarized antenna according to the embodiment of the present invention obtains a high antenna gain of 22.6 dB by arranging four such unit antennas.

Here, the circularly polarized antenna includes a single feed antenna including a ground plane, and a unit antenna having a structure arranged as a conductive structure that forms a circular flat plate characteristic upon linear polarization incident on the feed antenna. Such a circularly polarized antenna simultaneously improves antenna gain and antenna efficiency, and generates left and right polarizations according to linear polarizations, i.e., x- and y-polarizations of the feed antenna. That is, the circularly polarized antenna may generate a circularly polarized antenna with a single feeding antenna (source source) by placing the conductive array structure on the antenna, and may simultaneously improve the efficiency and gain of the antenna.

In addition, the array circular polarization antenna may improve antenna gain, axial ratio, and 3 dB axial ratio bandwidth by sequentially arranging the high gain circular polarization antennas designed in this manner, and thus, use the existing high gain circular polarization sequential array antenna technique. The complexity of the antenna design can be minimized by simplifying the feed structure than in the case of the present invention. In addition, the circularly polarized antenna can minimize the antenna supply power loss, thereby improving the efficiency of the antenna, and in the case of the conventional sequential array antenna, as described above, the gain of the individual patch antenna constituting the sequential array antenna is weak. It should be composed of 64 individual antennas in order to get high gain of 24dB because it is about 6dB. However, since the gain of the unit antenna has 17.05dB as a single antenna that emits circular polarization through one feeding, only four unit antennas are sequentially The high gain of 22.61dB can be achieved by aligning to improve the ratio and the 3dB ratio bandwidth. Next, an array circular polarization antenna according to an exemplary embodiment of the present invention will be described in more detail with reference to FIG. 1.

1 is a view schematically showing a conductive structure of an array circular polarized antenna in a wireless communication system according to an embodiment of the present invention. 1 is a diagram illustrating a conductive structure formed on an upper cover of a unit antenna structure that simultaneously improves antenna gain and implements circular polarization according to an embodiment of the present invention.

Referring to FIG. 1, the conductive structure includes a dielectric substrate 110 of a predetermined dielectric medium e _r and a conductive plate 120 having a predetermined shape on the dielectric substrate 110. Here, the conductor plate 120 is a radiating part of the circular polarization antenna, and includes a circular polarization inducing unit 130 formed in parallel to each other at the symmetrical edges of the diagonal direction facing the conductor plate 120, the conductive structure May be one patch antenna that emits circular polarizations.

The circular polarization inducing unit 130 is formed by chamfering (chamfering) to remove the diagonal symmetrical edges facing each other in a square patch in parallel to each other. The conductor plate 120 may have various sizes and shapes according to the operating frequency, antenna gain, and polarization characteristics of the circularly polarized antenna. That is, the conductive structure is a circular polarization antenna that emits circular polarizations by the circular polarization inducing unit 130 when linear polarization is supplied. Next, the unit antenna of the array circular polarization antenna according to the embodiment of the present invention will be described in more detail with reference to FIG. 2.

2 is a diagram schematically illustrating a unit antenna upper structure of an array circular polarization antenna in a wireless communication system according to an exemplary embodiment of the present invention. 2 is a view showing a top cover structure formed by arranging the conductive structure shown in FIG. 1 on a top cover according to an embodiment of the present invention.

Referring to FIG. 2, the unit antenna is formed on the upper cover 210 by arranging conductive structures 220, that is, a plurality of patches, as shown in FIG. 1 in the same predetermined direction. Here, the upper cover 210 may be the dielectric substrate 110 shown in FIG. 1, and the plurality of conductive structures 220, that is, the plurality of patches, may be the upper cover (the dielectric substrate 110). 210 is arranged in a predetermined direction.

In addition, the unit antenna, the top cover 210 size of the unit antenna can be increased to further improve the antenna gain, the shape of the top cover 210, rectangular, square, circle, oval, and trapezoidal. And various shapes. Next, the unit antenna structure of the array circular polarization antenna according to the embodiment of the present invention will be described in more detail with reference to FIG. 3.

3 is a diagram schematically illustrating a unit antenna structure of an array circular polarization antenna in a wireless communication system according to an exemplary embodiment of the present invention.

Referring to FIG. 3, as shown in FIG. 2, the unit antenna includes a plurality of conductive structures 320, that is, a top cover 310 having a plurality of patches arranged thereon, and a predetermined distance below the top cover 310. a ground substrate 350 spaced apart from (h), a dielectric substrate 340 formed on the ground substrate 350, and a feed antenna 330 formed on the dielectric substrate 340 to feed linearly polarized waves. do. As described above, the upper cover 310 may be the dielectric substrate 110 illustrated in FIG. 1, and the plurality of conductive structures 320 may be formed on the upper cover 310, which is the dielectric substrate 110. Arranged in a certain direction.

The feed antenna 330 is spaced apart from the top cover 310, thereby indirectly feeding the linear polarization to the top cover 310. That is, in the unit antenna, a predetermined space exists between the feed antenna 330 and the upper cover 310, and the feed antenna 330 is primarily radiated by power feeding, A plurality of conductive structures 320, that is, a plurality of patches, arranged on the upper cover 310 are secondarily radiated through the feeding. Here, the feed antenna 330 emits a linear polarization, and the upper cover 310 and the plurality of conductive structures 320 arranged on the upper cover 310 emit circular polarizations. In addition, the dielectric substrate 340 formed on the ground substrate 350 may be formed of a dielectric having various dielectric constant values including air, and the feed antenna 330 may be formed in the structure of the unit antenna. It can be located regardless of the location.

As such, the unit antenna may be indirectly fed to the plurality of conductive structures 320 serving as the patch antennas through one feeding antenna 330, thereby simplifying the feeding structure and easily designing the antenna. The efficiency of the antenna can be improved by minimizing the antenna supply power loss. That is, the unit antenna does not require a plurality of feed antennas corresponding to each of the plurality of conductive structures 320, and only one feed antenna 330 feeds all of the plurality of conductive structures 320 to each other. Complexity can be significantly reduced. In addition, the unit antenna may increase the gain of the antenna as the plurality of conductive structures 320 are arranged on the upper cover 310, as well as the plurality of antennas arranged on the upper cover 310 and the upper cover 310. The conductive structure 320 emits circularly polarized waves to further increase the gain of the antenna. Next, the power feeding antenna of the array circular polarization antenna according to the embodiment of the present invention will be described in more detail with reference to FIG. 4.

4 is a diagram schematically illustrating a feeding antenna structure of an array circular polarization antenna in a wireless communication system according to an exemplary embodiment of the present invention. 4 is a diagram illustrating a feed point of a feed antenna for generating left polarization and even polarization of a unit antenna according to an exemplary embodiment of the present invention.

Referring to FIG. 4, the array circular polarization antenna includes two types of feeds, that is, a first feed 400 and a second feed 450, depending on the position of the feed point. In the first feeder 400, a feed antenna 420 is positioned at a point spaced apart by a predetermined distance from a center point on the dielectric substrate 410 formed on the ground substrate. Here, in the first feed 400, the dielectric substrate 410 has a length in the y-axis is greater than the length in the x-axis, so that the first feed 400 generates a y-polarization to the upper cover Radiate.

When the feed antenna 420 emits the y-polarized wave through the first feed 400, the upper cover 310 and the plurality of conductive structures 320 arranged on the upper cover 310 shown in FIG. 3. Generates and radiates excellent polarization. That is, the unit antenna first emits y-polarized wave through the feed antenna 420, and radiates even polarized wave through the feeding of the first-radiated y-polarized wave, and thus, the unit antenna may include a first antenna. When the feed antenna 420 generates y-polarized wave through the feed 400, it becomes a circularly polarized antenna that emits even polarized wave.

In the second feed 450, a feed antenna 470 is positioned at a point spaced apart by a predetermined distance from a center point on the dielectric substrate 460 formed on the ground substrate. Here, in the second feed 450, the dielectric substrate 460 has a length in the y-axis smaller than a length in the x-axis, and accordingly, the second feed 450 generates an x-polarization to cover the top cover. To emit.

When the feed antenna 470 radiates x-polarized polarity through the second feed 450, the upper cover 310 and the plurality of conductive structures 320 arranged on the upper cover 310 shown in FIG. 3. Generates and radiates left-handed polarization. That is, the unit antenna first radiates an x-polarized wave through a feed antenna 470, and radiates a left polarized wave through feeding of the first radiated x-polarized wave. When the feed antenna 470 generates x-polarized wave through the feed 450, it becomes a circularly polarized antenna that emits left polarized wave. Next, the arrangement of the array circular polarization antenna according to the embodiment of the present invention will be described in more detail with reference to FIG. 5.

5 is a diagram schematically illustrating an array antenna structure of an array circular polarization antenna in a wireless communication system according to an exemplary embodiment of the present invention. 5 is a diagram illustrating an array antenna in which top covers of a unit antenna are sequentially arranged according to an exemplary embodiment of the present invention.

Referring to FIG. 5, the array antenna has two types of arrays, that is, a first array and a second array, according to the arrangement of unit antennas, and the first array will be described in more detail with reference to FIG. 6. The second array will be described in more detail with reference to FIG. 7.

The array antenna has a plurality of conductive structures 540, that is, the upper covers 510, 530, 550, 570 of the plurality of unit antennas in a clockwise direction with respect to the upper cover 530 of the first unit antenna in which the plurality of patches are arranged. It is formed by rotating at 0 °, 90 °, 180 °, 270 °, or by rotating it counterclockwise at 0 °, 90 °, 180 °, and 270 °. Here, a plurality of conductive structures 520, 540, 560, and 580 are arranged on the upper covers 510, 530, 550, and 570 of the plurality of unit antennas.

The array antennas formed by rotating the upper covers 510, 530, 550, 570 of the plurality of unit antennas in a clockwise or counterclockwise direction have the same shape as illustrated in FIG. 5, and are formed by rotating in a clockwise or counterclockwise direction. The array antenna emits even polarized or left polarized waves. That is, the array antenna may be a circularly polarized antenna that emits left polarized waves according to the feeding of the feed antenna included in the unit antenna, that is, the first or second feed, or a circularly polarized wave that emits even polarization. It becomes an antenna. Next, the array antenna according to the embodiment of the present invention will be described in more detail with reference to FIGS. 6 and 7.

6 and 7 schematically illustrate an array antenna array structure of an array circular polarization antenna in a wireless communication system according to an exemplary embodiment of the present invention. 6 shows an array antenna formed by a first array of unit antennas according to an embodiment of the present invention, and FIG. 7 shows an array antenna formed by a second array of unit antennas according to an embodiment of the present invention. It is shown.

Referring to FIG. 6, the array antenna is formed by rotating four counterpart antennas 610, 630, 650, and 670 that are radiated left-right polarized by x-polarized power supplied through a second feed 450. . In other words, the first unit antenna 610 that emits the left-handed polarization through the second feed 450 is sequentially arranged at 0 °, 90 °, 180 °, and 270 °, and thus the first array to emit the left-handed polarization. Form an antenna. In the array antenna, the unit antennas 610, 630, 650, and 670 have a phase difference of 0 °, 90 °, 180 °, and 270 ° based on the first unit antenna 610.

The array antenna is a circularly polarized antenna that emits left-handed polarization, and each of the unit antennas 610, 630, 650, and 670 radiates left-handed polarization by feeding the respective feed antennas 620, 640, 660, and 680 radiating x-polarized light. Accordingly, the plurality of conductive structures arranged on the top cover of the respective unit antennas 610, 630, 650, 670 forming the array antenna emit circular circular polarization, and the respective unit antennas 610, 630, 650, 670 radiate circular polarization as well. The array antenna also radiates circular polarizations. As a result, the array antenna becomes a circularly polarized antenna having a simple structure having high gain with a small number of feed antennas.

Referring to FIG. 7, the array antenna is formed by rotating four counter-antennas 710, 730, 750, and 770 that rotate a counterclockwise or clockwise direction in which y-polarized power is supplied through the first feed 400 to radiate even polarized waves. . In other words, the first unit antenna 710 that emits even polarization through the first feed 400 is sequentially arranged at 0 °, 90 °, 180 °, and 270 ° to emit a second polarization that emits even polarization. Form an antenna. Herein, the array antennas have phase differences of 0 °, 90 °, 180 °, and 270 ° of the unit antennas 710, 730, 750, and 770 based on the first unit antenna 710.

The array antenna is a circular polarization antenna that emits even polarization, and each of the unit antennas 710, 730, 750, and 770 radiates even polarization by feeding power of the respective feeding antennas 720, 740, 760, and 780 that emit y-polarization. Accordingly, the plurality of conductive structures arranged on the top cover of the respective unit antennas 710, 730, 750, 770 forming the array antenna emit circular circular polarization, and the respective unit antennas 710, 730, 750, 770 radiate circular polarization as well. The array antenna also radiates circular polarizations. As a result, the array antenna becomes a circularly polarized antenna having a simple structure having high gain with a small number of feed antennas. Then, the gain and the axial ratio of the array circular polarization antenna according to the embodiment of the present invention will be described in more detail with reference to FIGS. 8 to 11.

8 and 9 are graphs illustrating unit antenna axis ratios and gains of an array circular polarization antenna in a wireless communication system according to an exemplary embodiment of the present invention. 8 is a graph illustrating axial ratios of left-handed polarization and even-polarized polarization radiated from the unit antenna according to an embodiment of the present invention, and FIG. 9 is a diagram of the axial ratio of the unit antenna according to an embodiment of the present invention. It is a graph showing the realized gain of the left-wing polarization and the even-polarized polarization emitted.

8 and 9, the antenna axis ratio 810 of the even polarization and the antenna axis ratio 820 of the left polarization radiated from the unit antenna are 0.5 dB at 5.24 GHz and the 3 dB axial ratio bandwidth is 2.4%. The effective gain 910 of the even polarized wave and the left gain polarized wave 920 of the unit antenna are 17.05 dB at a center frequency of 5.24 GHz and a 3 dB bandwidth of 6.8%.

10 and 11 are graphs showing the array antenna axial ratio and the gain of the array circular polarization antenna in the wireless communication system according to the present invention. Here, FIG. 10 is a graph showing the axial ratios of left polarization and even polarization emitted from the array antenna according to an embodiment of the present invention, and FIG. 11 is a left polarization polarization emitted from the array antenna according to an embodiment of the present invention. And a graph showing the effective gain of the excellent polarization.

Referring to FIGS. 10 and 11, the antenna axis ratio 1010 of the even polarization and the antenna axis ratio 1020 of the left-hand polarization radiated from the array antenna are 0.005 dB at 5.24 GHz, and the 3 dB axial bandwidth has a value of 28% or more. The effective gain 1110 of the even polarized wave and the left gain polarized wave 1120 are 22.61 dB at 5.1 GHz and a 3 dB bandwidth of 5.7%.

In the array antenna in which the unit antennas are sequentially arranged, the gain, the axial ratio, and the 3 dB axial ratio bandwidth of the antenna are improved. That is, the array circular polarization antenna according to the embodiment of the present invention improves the unit antenna gains from the patch antenna through a different arrangement from that of the conventional general patch, and thus uses a smaller number of feed antennas. Acquire a high gain circularly polarized antenna. In other words, since the gain of a general patch antenna is 6dB, to obtain an antenna gain of 24dB, at least 64 patch antennas should be arranged. However, in the array circular polarization antenna according to the embodiment of the present invention, the gain of the unit antenna is 17dB. In addition, arranging these four unit antennas yields a high antenna gain of 22.6dB. That is, since the array circular polarization antenna according to the embodiment of the present invention has a gain of 17.05 dB of an individual antenna that emits circular polarization through feeding by one feeding antenna, that is, a unit antenna, only four unit antennas are used. By sequentially arranging, an array antenna having a high gain of 22.61 dB can be easily realized. Next, the manufacturing process of the array circular polarization antenna according to the embodiment of the present invention will be described in more detail with reference to FIG. 12.

12 is a diagram schematically illustrating a manufacturing process of an array circular polarization antenna in a wireless communication system according to an exemplary embodiment of the present invention.

Referring to FIG. 12, in operation 1210, one feed antenna is formed on a dielectric substrate formed on a ground substrate. Here, the feeding antenna is formed by a point that is spaced apart by a predetermined distance from the center point on the dielectric substrate, the first feed 400 or the second feed 450 according to the formed point, that is, the feed point It is determined that the feed antenna emits x-polarized waves or y-polarized waves.

Next, in operation 1220, a plurality of conductive structures are formed on the top cover of the feed antenna, using a top cover of a dielectric substrate positioned to be spaced apart by a predetermined distance h from the ground substrate on which the dielectric substrate and the feed antenna are formed. Ie form a plurality of patches. In this case, the plurality of conductive structures are formed by being arranged in the same predetermined direction, and when the linearly polarized wave is fed, the symmetrical edges of the diagonal directions facing from the square patch are removed in parallel to each other so as to generate and radiate the circularly polarized wave. Here, the plurality of conductive structures may have various sizes and shapes according to the operating frequency, antenna gain, and polarization characteristics of the circularly polarized antenna, and the upper cover has a larger size to further improve the antenna gain. It may have various shapes such as rectangular, square, circle, oval, and trapezoid.

Further, when the feed antenna radiates x-polarized light to feed the top cover, the plurality of conductive structures and the top cover become a circularly polarized antenna that radiates left polarization, and the feed antenna radiates y-polarized wave. When the upper cover is fed to the upper cover, the plurality of conductive structures and the upper cover become a circularly polarized antenna that emits even polarized waves. That is, one unit antenna is formed by one feed antenna and an upper cover of the feed antenna on which the plurality of conductive structures are formed, and the unit antenna becomes a circularly polarized antenna. In this case, the structure of the antenna is simplified as the plurality of conductive structures are fed through one feeding antenna. When the plurality of conductive structures are fed, not only the upper cover but also the plurality of conductive structures arranged on the upper cover radiate circular polarizations to gain antenna gain. This is improved.

Next, in step 1230, the plurality of unit antennas formed as described above are rotated by a predetermined phase difference, for example, four unit antennas are rotated at 0 °, 90 °, 180 °, and 270 ° in a clockwise or counterclockwise direction. Four unit antennas are sequentially arranged at 0˚, 90˚, 180˚, and 270˚ based on the unit antenna of. The array antennas are formed by sequentially arranging a plurality of unit antennas having a phase difference, and the array antennas emit left or right polarized waves according to feeding of the feed antennas included in each of the arranged unit antennas.

In other words, the array antenna formed by sequentially arranging a plurality of unit antennas each including a feed antenna for radiating x-polarized waves is a circularly polarized antenna for radiating left polarized waves, and the feed antenna for radiating y-polarized waves An array antenna formed by sequentially arranging a plurality of unit antennas included in each, becomes a circularly polarized antenna that emits even polarization. Here, when the x-polarized wave is fed, not only the array antenna and the plurality of unit antennas, but also a plurality of conductive structures included in the plurality of unit antennas radiate left polarized wave, and when the y-polarized wave is fed, the array antenna and In addition to the plurality of unit antennas, a plurality of conductive structures included in the plurality of unit antennas emit left-handed polarization. In addition, as the power is fed through a small number of feed antennas, the complexity of the antenna is minimized, and when fed, a plurality of arrays arranged in the plurality of top covers as well as an array antenna and a plurality of top covers forming the array antenna are provided. Conductive structures emit circular polarizations to improve antenna gain.

While the invention has been shown and described with reference to certain preferred embodiments thereof, it will be understood by those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the invention. Therefore, the scope of the present invention should not be limited by the described embodiments, but should be determined by the scope of the appended claims, as well as the appended claims.

1 is a view schematically showing a conductive structure of an array circular polarized antenna in a wireless communication system according to an embodiment of the present invention.

2 is a diagram schematically illustrating a unit antenna upper structure of an array circular polarization antenna in a wireless communication system according to an exemplary embodiment of the present invention.

3 is a diagram schematically illustrating a unit antenna structure of an array circular polarization antenna in a wireless communication system according to an exemplary embodiment of the present invention.

4 is a diagram schematically illustrating a feed antenna structure of an array circular polarized antenna in a wireless communication system according to an exemplary embodiment of the present invention.

5 is a diagram schematically illustrating an array antenna structure of an array circular polarization antenna in a wireless communication system according to an exemplary embodiment of the present invention.

6 and 7 schematically illustrate an array antenna array structure of an array circular polarized antenna in a wireless communication system according to an embodiment of the present invention.

8 and 9 are graphs showing unit antenna axis ratios and gains of an array circular polarization antenna in a wireless communication system according to an exemplary embodiment of the present invention.

10 and 11 are graphs showing an array antenna axis ratio and a gain of an array circular polarization antenna in a wireless communication system according to an embodiment of the present invention.

12 is a diagram schematically illustrating a manufacturing process of an array circular polarization antenna in a wireless communication system according to an exemplary embodiment of the present invention.

Claims (20)

An array circular polarized antenna in a wireless communication system, A feed antenna positioned at a predetermined point on the dielectric substrate on the ground substrate; A unit antenna in which a plurality of conductive structures are arranged in the same predetermined direction on a superstrate which is spaced apart from the ground substrate by a predetermined distance on an upper portion of the feeding antenna; And And an array antenna arranged in sequence so that the plurality of unit antennas have a predetermined phase difference. And the plurality of conductive structures, the unit antenna, and the array antenna radiate circular polarizations, respectively, when the feed antenna emits linearly polarized waves. The method of claim 1, And wherein the plurality of conductive structures, the unit antenna, and the array antenna emit left handed polarized waves, respectively, when the feed antenna emits x-polarized light. The method of claim 1, The array antenna is an array circular polarized antenna, characterized in that the plurality of unit antennas including a feed antenna for emitting x-polarized light are arranged in sequence so as to have a phase difference of 0 °, 90 °, 180 °, 270 °. The method according to claim 2 or 3, The x-polarized wave is radiated from a feed antenna having a feed point at a point spaced a predetermined distance from a center point on the dielectric substrate having a shape whose length in the y-axis is smaller than the length in the x-axis. Array circular polarization antenna. The method of claim 1, And wherein the plurality of conductive structures, the unit antenna, and the array antenna emit right-handed polarized waves, respectively, when the feed antenna emits y-polarized light. The method of claim 1, The array antenna is an array circular polarization antenna, characterized in that the plurality of unit antennas including a feed antenna that emits y-polarization are sequentially arranged so as to have a phase difference of 0 °, 90 °, 180 °, 270 °. The method according to claim 5 or 6, The y-polarized light is emitted from a feed antenna having a feed point at a point spaced a predetermined distance from a center point on the dielectric substrate having a shape whose length in the y-axis is larger than the length in the x-axis. Array circular polarization antenna. The method of claim 1, And the plurality of conductive structures have a shape in which diagonally symmetrical edges facing each other in a rectangular patch are removed in parallel to each other. The method of claim 1, And the plurality of conductive structures are indirectly fed with the linear polarization from the feeding antenna and radiate different circularly polarized waves corresponding to the indirectly fed linearly polarized wave. The method of claim 1, And the plurality of conductive structures are determined in size and shape according to operating frequency, antenna gain, and polarization characteristics of the circularly polarized antenna. In the method of manufacturing an array circular polarized antenna in a wireless communication system, Forming a first dielectric substrate on the ground substrate; Forming a feed antenna at a predetermined point on the first dielectric substrate; Positioning a second dielectric substrate on the feeding antenna spaced apart from the ground substrate by a predetermined distance; Arranging a plurality of conductive structures on the second dielectric substrate in the same predetermined direction; And And sequentially arranging a plurality of second dielectric substrates on which the plurality of conductive structures are arranged to have a predetermined phase difference. When linear polarization is radiated from the feed antenna, circular polarizations are radiated from the plurality of conductive structures, the second dielectric substrate on which the plurality of conductive structures are arranged, and the plurality of sequentially arranged second dielectric substrates, respectively. Method of manufacturing an array circular polarized antenna, characterized in that. 12. The method of claim 11, When x-polarized radiation is emitted from the feed antenna, left polarization is performed in the plurality of conductive structures, the second dielectric substrate in which the plurality of conductive structures are arranged, and the plurality of second dielectric substrates in the sequence. Method for manufacturing an array circular polarized antenna, characterized in that each handed polarized wave (emission). 12. The method of claim 11, The sequentially arranging may include sequentially arranging a plurality of second dielectric substrates disposed on the feed antenna radiating x-polarized waves so as to have a phase difference of 0 °, 90 °, 180 °, and 270 °. Method for manufacturing a circularly polarized antenna. 12. The method of claim 11, The forming of the feed antenna may include x at a predetermined point such that a point spaced a predetermined distance from a center point on the first dielectric substrate having a shape whose length in the y-axis is smaller than the length in the x-axis is a feeding point. A polarizing feed antenna is formed. An array circular polarizing antenna manufacturing method. 12. The method of claim 11, When y-polarized radiation is emitted from the feed antenna, right polarization is performed in the plurality of conductive structures, the second dielectric substrate in which the plurality of conductive structures are arranged, and the plurality of second dielectric substrates in the sequence. and -handed polarized wave respectively radiate. 12. The method of claim 11, The sequentially arranging may include sequentially arranging a plurality of second dielectric substrates positioned on the feed antenna that emits y-polarization so as to have a phase difference of 0 °, 90 °, 180 °, and 270 °. Method for manufacturing a circularly polarized antenna. 12. The method of claim 11, The forming of the feeding antenna may include y at a predetermined point such that a point spaced a predetermined distance from a center point on the first dielectric substrate having a shape whose length in the y-axis is larger than the length in the x-axis is a feeding point. A polarizing feed antenna is formed. An array circular polarizing antenna manufacturing method. 12. The method of claim 11, The arranging in the predetermined direction may include forming the plurality of conductive structures in a shape in which symmetrical edges of diagonal directions facing each other in a rectangular patch are removed in parallel to each other. 19. The method of claim 18, Forming the plurality of conductive structures comprises determining the size and shape according to the operating frequency, antenna gain, and polarization characteristics of the circularly polarized antenna. 12. The method of claim 11, The linearly polarized wave is indirectly fed from the feed antenna, and different circularly polarized waves corresponding to the indirectly fed linearly polarized wave are radiated from the plurality of conductive structures.

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