Phased array antenna capable of multi-polarized wide-angle beam scanning

Abstract

The present invention can provide a phased array antenna capable of multi-polarized optical beam scanning, comprising: an antenna substrate having the planar structure of a planar antenna and having electrical characteristics; a plurality of open cavities formed over the antenna substrate; a plurality of radiation patches arranged and seated on the upper surface of the antenna substrate exposed by the plurality of open cavities; a grid substrate which is positioned above the antenna substrate, and which has partition walls formed to intersect at predetermined angles so as to form the plurality of open cavities; conducting guide rings which are positioned on the upper surface of the grid substrate, and which are formed in respective intersection areas in which the partition walls intersect; a ground line formation layer positioned under the antenna substrate so as to form a ground for the plurality of radiation patches; and a plurality of feed lines for supplying multiple power sources to the plurality of radiation patches.

Description

Phased array antenna capable of multi-polarization wide-angle beam scanning

[0001] The present invention relates to an array antenna, and more particularly, to a phased array antenna capable of multi-polarization wide-angle beam scanning that can expand the beam width of an array antenna formed by arranging a plurality of patch antennas while improving mutual interference phenomena caused by components provided for beam width expansion.

[0002] Patch antennas are generally small, lightweight, easy to manufacture, have uniform signal radiation characteristics, and are inexpensive. These advantages have led to their application in a variety of communication devices.

[0003] The structure of a conventional patch antenna is as illustrated in Fig. 1. Referring to Fig. 1, the patch antenna is composed of a radiator substrate (100) and a radiation patch (102) positioned on the radiator base (100). A ground line (GND) is connected to the bottom of the radiator base (100), and a feed line is connected to the radiator patch (102).

[0004] An array antenna can be formed by arranging a plurality of the above-described patch antennas, and as an example of such technology, there is a patent registered in the Korean Intellectual Property Office under the title of "Patch Array Antenna and Control Method of Patch Array Antenna" No. 10-1806080. This patent discloses a patch array antenna comprising: a plurality of patch antennas arranged in a matrix structure at predetermined intervals; and a feed line arranged to connect the plurality of patch antennas arranged in the matrix structure.

[0005] And, Patent Publication No. 10-2023-0073480, entitled Phased Array Antenna Module, published by the Korean Intellectual Property Office, discloses a phased array antenna module including a package antenna having a plurality of patch antennas formed on an upper surface; and a substrate having a connection pattern electrically connected to the package antenna, on which the package antenna is mounted; wherein the number of the package antennas is plural, and the plurality of package antennas are arranged in a 2N×2N array on the upper surface of the substrate and mounted in contact with each other.

[0006] As described above, the beamforming performance of an array antenna is determined by a combination of the beam pattern and array factor of a single antenna. Therefore, the performance of a single antenna element is crucial. Therefore, the development of a single antenna element that maintains high gain while also possessing a wide beam width over a three-dimensional area has been required.

[0007] A technology proposed in response to such a need is patent No. 10-2221818 registered with the Korean Intellectual Property Office entitled “Multilayer Antenna Utilizing a Dielectric Open Cavity.” This patent discloses a multilayer antenna utilizing a dielectric open cavity, which includes: a grounding portion formed in a lower layer; a feeding portion formed in the same layer as the grounding portion and receiving a signal; a radiator formed in an upper layer of the grounding portion and the feeding portion and radiating a signal applied to the feeding portion into free space; a dielectric having a perforated center and laminated on the radiator to form a step with the radiator; an open cavity formed upward by laminating the dielectric on the radiator; a radiating patch exposed through the perforated center portion of the dielectric and connected to the feeding portion and a feeding line to radiate a signal applied to the feeding portion through the open cavity; and a conductor guide ring formed around the perforated center portion of the dielectric so as to expand a beam width formed from the antenna.

[0008] These multilayer antennas expanded the beam width of patch antennas through conductor guide rings formed around the perforated portion at the center of the dielectric, but when arranging a plurality of patch antennas to form an array antenna, several problems occurred due to the conductor guide rings.

[0009] Fig. 2 illustrates an example of configuring an array antenna by arranging patch antennas equipped with the above-described conductor guide rings. Referring to Fig. 2, when patch-type antennas equipped with conductor guide rings are arranged in close proximity, a phenomenon occurs in which mutual interference increases due to parasitic capacitance formed between the conductor guide rings.

[0010] Accordingly, there has been an urgent need to develop an array antenna capable of improving the mutual interference phenomenon caused by components provided to expand the beam width of an array antenna composed of a plurality of patch antennas.

[0011] The purpose of the present invention is to provide a phased array antenna capable of multi-polarization wide-angle beam scanning that can improve mutual interference phenomenon caused by components provided for beam width expansion in an array antenna composed by arranging a plurality of patch antennas.

[0012] To this end, a phased array antenna capable of multi-polarization optical beam scanning according to the present invention may include: an antenna substrate forming a planar structure of a flat antenna and forming electrical characteristics; a plurality of open cavities formed on an upper surface of the antenna substrate; a plurality of radiating patches arranged and mounted on an upper surface of the antenna substrate exposed by the plurality of open cavities; a grid substrate positioned on an upper surface of the antenna substrate, wherein partition walls are formed to intersect each other at a predetermined angle to form the plurality of open cavities; conductor guide rings positioned on an upper surface of the grid substrate, and formed in each of the intersecting areas where the partition walls intersect each other; a ground line forming layer positioned on a lower surface of the antenna substrate and forming a ground for the plurality of radiating patches; and a plurality of feed lines supplying multiple power sources to the plurality of radiating patches.

[0013] In addition, the size of the open cavity is characterized in that it is set differently in the central region and the edge region of the antenna substrate.

[0014] In addition, the plurality of power supply lines are characterized in that they are connected to each of the plurality of radiating patches through insulated holes formed in the ground line forming layer and the antenna substrate.

[0015] In addition, the plurality of feed lines are positioned in a feed line forming layer located on the lower surface of the ground line forming layer, and the terminal portions of the plurality of feed lines are positioned at preset points on the lower surface of the plurality of radiating patches, and a cavity is formed in each of predetermined areas of the ground line forming layer corresponding to the terminal portions of the plurality of feed lines.

[0016] In addition, the thickness and width of the grid substrate in each of the intersection areas where the partition walls intersect are determined differently depending on the number of intersecting partition walls in each intersection area.

[0017] In addition, the thickness and width of each of the conductor guide rings are determined differently depending on the number of intersecting partitions in the intersection area of ​​the grid substrate on which each conductor guide ring is formed.

[0018] In addition, each of the conductor guide rings is characterized in that it is formed to be a predetermined length in a direction that follows each of the intersecting bulkheads in the intersection area.

[0019] In addition, the length of each of the conductor guide rings is determined differently depending on the number of intersecting partitions in the intersection area of ​​the grid substrate on which each conductor guide ring is formed.

[0020] The present invention has the effect of improving the mutual interference phenomenon caused by components provided for beam width expansion in an array antenna configured by arranging a plurality of patch antennas.

[0021] Figure 1 is a drawing illustrating the structure of a conventional patch antenna.

[0022] Figure 2 is a drawing illustrating a case where an array antenna is configured as a patch antenna having a conductor guide ring.

[0023] FIG. 3 is a drawing showing the overall structure of a phased array antenna capable of multi-polarization wide-angle beam scanning according to the first embodiment of the present invention.

[0024] FIG. 4 and FIG. 5 are cross-sectional views of a portion of a phased array antenna capable of multi-polarization wide-angle beam scanning according to the first embodiment of the present invention.

[0025] FIG. 6 is a drawing showing the overall structure of a phased array antenna capable of multi-polarization wide-angle beam scanning according to a second embodiment of the present invention.

[0026] FIG. 7 and FIG. 8 are cross-sectional views of a portion of a phased array antenna capable of multi-polarization wide-angle beam scanning according to a second embodiment of the present invention.

[0027] FIG. 9 is a diagram illustrating a beam width improvement state in a phased array antenna according to a preferred embodiment of the present invention.

[0028] The present invention enables improvement of mutual interference phenomenon caused by components provided for beam width expansion in an array antenna configured by arranging a plurality of patch antennas.

[0029] Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings so that those skilled in the art can easily practice the present invention. Since the description of the present invention is merely an example for structural and functional explanation, the scope of the present invention should not be construed as being limited to the embodiments described in the text. In other words, the present invention is capable of various modifications and can be implemented in various different forms, and therefore, it should be understood that the scope of the present invention includes equivalents that can realize the technical idea.

[0030] Meanwhile, the meanings of terms described in the present invention should be understood as follows. Terms such as "first" and "second" are intended to distinguish one component from another, and the scope of rights should not be limited by these terms. For example, a first component may be referred to as a second component, and similarly, a second component may also be referred to as a first component. When a component is referred to as being "connected" to another component, it should be understood that it may be directly connected to the other component, but there may also be another component in between. On the other hand, when a component is referred to as being "directly connected" to another component, it should be understood that there is no other component in between. Meanwhile, other expressions describing the relationship between components, such as "between" and "immediately between" or "adjacent to" and "directly adjacent to", should be interpreted similarly.

[0031] Also, singular expressions should be understood to include plural expressions unless the context clearly indicates otherwise, and terms such as "include" or "have" are intended to specify the presence of implemented features, numbers, steps, operations, components, parts, or combinations thereof, and should be understood as not excluding in advance the possibility of the presence or addition of one or more other features, numbers, steps, operations, components, parts, or combinations thereof. In addition, identifiers (e.g., a, b, c, etc.) for each step are used for convenience of explanation and do not describe the order of each step, and each step may occur in a different order than stated unless the context clearly indicates a specific order. That is, each step may occur in the same order as stated, may be performed substantially simultaneously, or may be performed in the opposite order.

[0032] Additionally, all terms used herein, unless otherwise defined, have the same meaning as commonly understood by those of ordinary skill in the art to which the present invention pertains. Terms defined in commonly used dictionaries should be interpreted to be consistent with their meaning within the context of the relevant technology, and should not be interpreted as having ideal or overly formal meanings unless explicitly defined herein.

[0033] Please note that the drawings are schematic and not drawn to scale. The relative dimensions and proportions of parts in the drawings may be exaggerated or reduced for clarity and convenience, and any dimensions are for illustrative purposes only and are not limiting. In addition, identical structures, elements, or components appearing in two or more drawings are designated by the same reference numerals to indicate similar features.

[0034] One embodiment of the present invention specifically illustrates an ideal embodiment of the present invention. Consequently, various modifications to the diagram are anticipated. Therefore, the embodiment is not limited to the specific form of the illustrated area, and includes modifications of the form, for example, due to manufacturing.

[0035] Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the attached drawings.

[0036] <First Embodiment>

[0037] <Configuration and operation of a phased array antenna capable of multi-polarization wide-angle beam scanning>

[0038] FIG. 3 illustrates the entire structure of a phased array antenna capable of multi-polarization wide-angle beam scanning according to a first embodiment of the present invention, and FIGS. 4 and 5 are cross-sectional views of a portion of a phased array antenna capable of multi-polarization wide-angle beam scanning according to a first embodiment of the present invention.

[0039] Referring to FIGS. 3 to 5, the configuration and operation of a phased array antenna capable of multi-polarization wide-angle beam scanning according to the first embodiment will be described. The phased array antenna capable of multi-polarization wide-angle beam scanning is largely configured to include a first antenna substrate (200), a first grid substrate (202), a plurality of first radiation patches (204), a plurality of first conductor guide rings (206), a first antenna ground formation layer (208), first-1 and first-2 feed lines (210, 212), first-1 and first-2 prepregs (214, 216), and a plurality of first open cavities (220).

[0040] The first antenna substrate (200) is one of the main components of the antenna, and plays a role in stabilizing the electrical characteristics of the antenna and forming the geometric structure of the flat antenna. The first antenna substrate (200) has a planar shape for the phased array antenna according to the first preferred embodiment of the present invention. The material, thickness, dielectric constant, loss factor, dielectric properties, etc. of the first antenna substrate (200) are determined to match the characteristics of the antenna, such as bandwidth, radiation efficiency, and efficiency.

[0041] The first grid substrate (202) is located on the upper surface of the first antenna substrate (200), and is a grid-shaped structure in which partition walls are formed by intersecting vertically and horizontally to form a plurality of first open cavities (220). The first grid substrate (202) may be formed of a dielectric having the same dielectric constant as that of the first antenna substrate (200), or may be formed of a dielectric having a different dielectric constant. The thickness, width, and dielectric constant of the grid formed on the first grid substrate (202) are also determined to match the characteristics of the antenna.

[0042] The above-described plurality of first open cavities (220) are open spaces formed by the partition walls of the first grid substrate (202) on the upper surface of the first antenna substrate (200). They electromagnetically resonate at a characteristic frequency and amplify or attenuate radio waves of the corresponding frequency. This improves the characteristics of the antenna in wireless communications and is used to detect radio signals in a specific frequency band.

[0043] The above-described plurality of first radiating patches (204) are installed at the central position of each of the open areas corresponding to the plurality of first open cavities (220) on the upper surface of the first antenna substrate (200), and emit or receive radio waves in a multi-polarization band by power provided through the first-1 and first-2 power lines (210, 212). The size of each of the open areas corresponding to the plurality of first open cavities (220) is determined to be large relative to the radiating patches, so that a portion of the first antenna substrate (200) is formed to be exposed to free space around the radiating patches.

[0044] The above plurality of first conductor guide rings (206) are formed on the upper surface of the first grid substrate (202) formed as the grid-shaped structure to expand the beam width for the above plurality of first radiating patches (204).

[0045] In particular, the plurality of first conductor guide rings (206) are formed in an area where the partition walls forming the grid shape intersect each other and in an area of ​​a predetermined length following the partition walls in order to minimize the parasitic capacitance formed when the plurality of first radiating patches (204) operate, thereby limiting the mutual interference phenomenon and expanding the beam width. In particular, the formation of the conductor guide rings is restricted from the central portion of the partition walls forming the plurality of first open cavities (220), thereby minimizing the occurrence of the mutual interference phenomenon.

[0046] To explain in more detail, area A of FIG. 3 is a point where the first and second bulkheads (W1, W2) intersect, and the conductor guide ring (M1) is formed in an “ㄱ” shape in an area corresponding to a predetermined length while following the intersection of the first and second bulkheads (W1, W2) and the first and second bulkheads (W1, W2). In addition, area B of FIG. 3 is a point where the third to fifth bulkheads (W3 to W5) intersect, and the conductor guide ring (M2) is formed in an “ㅗ” shape in an area corresponding to the intersection of the third to fifth bulkheads (W3 to W5) and the predetermined length while following the third to fifth bulkheads (W3 to W5). And the C area of ​​FIG. 3 is the point where the 6th to 9th bulkheads (W6 to W9) intersect, and the conductor guide ring (M3) is formed in a “+” shape in the intersection area of ​​the 6th to 9th bulkheads (W6 to W9) and in an area corresponding to a predetermined length while following the 6th to 9th bulkheads (W6 to W9).

[0047] Since the above multiple first conductor guide rings (206) have different beam width expansion degrees and mutual interference degrees depending on their lengths, the length of the conductor guide rings is determined depending on the operational purpose of the antenna.

[0048] In addition, among the above-mentioned plurality of conductor guide rings (206), the length of the conductor guide rings located at the center of the array antenna is determined as a second value having a shorter length, and the length of the conductor guide rings located at the edge of the array antenna is determined as a first value having a longer length, so that the mutual interference phenomenon can occur less in the area where the conductor guide rings are densely packed.

[0049] The first ground line forming layer (208) is located on the lower surface of the first antenna substrate (200) and provides grounding to the plurality of first radiating patches (204).

[0050] And, on the lower surface of the first ground line forming layer (208), first other substrates (218) are positioned.

[0051] The above-mentioned first-first and first-second power lines (210, 212) are connected to each of the plurality of first radiating patches (204) through insulated holes that can pass through the first other substrates (218), the first ground line forming layer (208), and the first antenna substrate (200), thereby supplying multiple power sources to the plurality of first radiating patches (204).

[0052] And the 1-1 prepreg (214) is positioned between the first antenna substrate (200) and the first grid substrate (202) to adhere the first antenna substrate (200) and the first grid substrate (202). And the 1-2 prepreg (216) is positioned between the first ground line forming layer (208) and the first other substrates (218) to adhere the first ground line forming layer (208) and the first other substrates (218), and serves to determine electrical characteristics and provide structural strength to the antenna.

[0053]

[0054] <Second Embodiment>

[0055] <Configuration and operation of a phased array antenna capable of multi-polarization wide-angle beam scanning>

[0056] FIG. 6 illustrates the entire structure of a phased array antenna capable of multi-polarization wide-angle beam scanning according to a second embodiment of the present invention, and FIGS. 7 and 8 are cross-sectional views of a portion of a phased array antenna capable of multi-polarization wide-angle beam scanning according to a second embodiment of the present invention.

[0057] Referring to the above drawings 6 to 8, the configuration and operation of a phased array antenna capable of multi-polarization wide-angle beam scanning according to the second embodiment are described. The above-described phased array antenna capable of multi-polarization wide-angle beam scanning is largely configured to include a second antenna substrate (300), a second grid substrate (302), a plurality of second radiation patches (304), a plurality of second conductor guide rings (306), a second ground line (antenna ground) formation layer (308), second-1 and second-2 feed line (310, 312) formation layers, second-1 and second-2 prepregs (314, 316), a plurality of second open cavities (320), and second-1 and second-2 apertures (322, 324).

[0058] The second antenna substrate (300) is one of the main components of the antenna, and plays a role in stabilizing the electrical characteristics of the antenna and forming the geometric structure of the flat antenna. The second antenna substrate (300) has a planar shape for the phased array antenna according to the second embodiment of the present invention. The material, thickness, dielectric constant, loss factor, dielectric properties, etc. of the second antenna substrate (300) are determined to match the characteristics of the antenna, such as bandwidth, radiation efficiency, and efficiency.

[0059] The second grid substrate (302) is located on the upper surface of the second antenna substrate (300), and is a grid-shaped structure in which partition walls are formed by crossing each other vertically and horizontally to form a plurality of second open cavities (320). The second grid substrate (302) may be formed of a dielectric having the same dielectric constant as that of the second antenna substrate (300), or may be formed of a dielectric having a different dielectric constant. The thickness, width, and dielectric constant of the grid formed on the second grid substrate (302) are also determined to match the characteristics of the antenna.

[0060] The above-described plurality of second open cavities (320) are open spaces formed by the partition walls of the second grid substrate (302) on the upper surface of the second antenna substrate (300). They electromagnetically resonate at a characteristic frequency and amplify or attenuate radio waves of the corresponding frequency. This improves the characteristics of the antenna in wireless communications and is used to detect radio signals in a specific frequency band.

[0061] The above-described plurality of second radiating patches (304) are installed at the central position for each of the open areas corresponding to the plurality of second open cavities (320) on the upper surface of the second antenna substrate (300), and emit or receive radio waves in a multi-polarization band by multiple power sources provided through the second-1 and second-2 power supply lines (310, 312). The size of each of the open areas corresponding to the plurality of second open cavities (320) is determined to be large relative to the radiating patches, so that a portion of the second antenna substrate (300) is formed to be exposed to free space around the radiating patches.

[0062] The above-described plurality of second conductor guide rings (306) are formed on the upper surface of the second grid substrate (302) formed as the grid-shaped structure in order to expand the beam width for the above-described plurality of second radiating patches (304). In particular, the above-described plurality of second conductor guide rings (306) are formed in an area where the partition walls forming the grid-shaped structure intersect each other in order to minimize the parasitic capacitance formed during the operation of the plurality of second radiating patches (304) and thereby limit the mutual interference phenomenon while enabling the beam width expansion.

[0063] Since the above plurality of second conductor guide rings (306) have different degrees of beam width expansion and mutual interference depending on their thickness, the thickness of the conductor guide rings can be determined to have different values ​​depending on the operational purpose of the antenna.

[0064] In addition, among the plurality of second conductor guide rings (306) described above, the thickness of the conductor guide rings located at the center of the array antenna is determined to be a preset B value with a thin thickness, and the thickness of the conductor guide rings located at the edge of the array antenna is determined to be a preset A value with a thick thickness, thereby minimizing the occurrence of mutual interference in the area where the conductor guide rings are densely packed.

[0065] The second ground line forming layer (308) is located on the lower surface of the second antenna substrate (300) and provides grounding to the plurality of second radiating patches (304). In addition, first and second apertures (322, 324) are formed in areas of the second ground line forming layer (308) corresponding to the terminal areas of the 2-1 and 2-2 feed lines (310, 312), so that power from the 2-1 and 2-2 feed lines (310, 312) is transmitted to the radiating patches through the first and second apertures (322, 324), respectively.

[0066] The second-first and second-second power supply lines (310, 312) are formed on the lower surface of the second ground line forming layer (308), and the ends of the second-first and second power supply lines (310, 312) are arranged to reach the lower surfaces of the radiating patches, so that power is supplied to the radiating patches through the first and second apertures (322, 324) formed in the second ground line forming layer (308).

[0067] Other substrates (318) are located below the formation layer of the above 2-1 and 2-2 power supply lines (310, 312).

[0068] And the 2-1 prepreg (314) is positioned between the second antenna substrate (300) and the second grid substrate (302) to adhere the second antenna substrate (300) and the second grid substrate (302). And the 2-2 prepreg (316) is positioned between the second ground line formation layer (308) and the formation layers of the 2-1 and 2-2 feed lines (310, 312) to adhere the second ground line formation layer (308) and the formation layers of the 2-1 and 2-2 feed lines (310, 312), and serves to determine electrical characteristics and provide structural strength to the antenna.

[0069] In the first and second preferred embodiments of the present invention described above, only the grid substrate is disclosed to form a hexahedral open cavity by forming the partition walls to intersect vertically and horizontally, but the partition walls may be formed to intersect diagonally to form a diamond-shaped open cavity, and even in this case, the conductor guide rings may be formed in the region where the partition walls intersect each other on the upper surface of the grid substrate, or the conductor guide rings may be formed in the region where the partition walls intersect each other and in the region corresponding to a predetermined length while following the partition walls.

[0070] In addition, in the first and second preferred embodiments of the present invention, only the thickness and width of the partition walls forming the grid substrate are exemplified as being the same, but the thickness and width of the partition walls may be determined differently depending on the number of intersecting partition walls in the intersection area where the partition walls intersect. To explain in more detail, if the number of intersecting partition walls for each of the intersection areas is greater than or equal to the first value, the thickness of the grid substrate may be determined as the second value and the width may be determined as the third value, and if the number of intersecting partition walls is less than the first value, the thickness of the grid substrate may be determined as the fourth value, which is a value greater than the second value, and the width may be determined as the fifth value, which is a value greater than the third value. This reduces the density of the partition walls of the grid substrate, thereby limiting the mutual interference phenomenon concentrated in the central portion of the array antenna.

[0071] In addition, in the first embodiment of the present invention, the thickness and width of the conductor guide rings are only disclosed to be the same, but they may be determined differently depending on the number of intersecting partition walls in the intersection area where the partition walls intersect. To explain in more detail, if the number of intersecting partition walls in the intersection area is greater than or equal to the first value, the thickness of the conductor guide rings may be determined as the sixth value and the width may be determined as the seventh value, and if the number of intersecting partition walls is less than the first value, the thickness of the conductor guide rings may be determined as the eighth value, which is a value greater than the sixth value, and the width may be determined as the ninth value, which is a value greater than the seventh value. This reduces the density of the conductor guide rings, thereby limiting the mutual interference phenomenon concentrated in the central portion of the array antenna.

[0072] In addition, each of the conductor guide rings is disclosed to be formed only in an area corresponding to a predetermined length while following each of the intersecting partition walls in the intersection area, but the length of each of the conductor guide rings may also be determined differently depending on the number of intersecting partition walls in the intersection area. To explain in more detail, for each of the conductor guide rings, if the number of intersecting partition walls in the intersection area where it is formed is greater than or equal to a first value, the length may be determined as a tenth value, and if the number of intersecting partition walls is less than the first value, the length may be determined as an eleventh value greater than the tenth value. This reduces the density of the conductor guide rings, thereby limiting the mutual interference phenomenon concentrated in the central portion of the array antenna.

[0073] Additionally, the size of the open cavity may be set differently in the central and peripheral regions of the antenna substrate. This reduces the density of components that cause mutual interference, thereby reducing the mutual interference phenomenon concentrated in the central region of the array antenna.

[0074] <Experimental Results>

[0075] The beam width improvement effect in the phased array antenna according to the preferred embodiment of the present invention described above was experimentally verified, and the results are illustrated in FIG. 9. FIG. 9 (a) shows a beam formation state when a conductor guide ring is formed over the entire upper portion of the partition walls forming the grid substrate of the phased array antenna, and FIG. 9 (b) shows a beam formation state when a conductor guide ring is formed only on a part of the partition walls according to the first embodiment of the present invention. Referring to FIG. 9, when the conductor guide ring was formed over the entire upper portion of the partition walls forming the grid substrate, there were parts (C) where no beam was formed. However, when the conductor guide rings were formed only for a part of the upper portion of the partition walls forming the grid substrate, that is, the part where the partition walls intersect and a part of the section following the partition walls, it was confirmed that a beam was formed (D) even in the parts where the beam was not formed, thereby improving the beam width.

[0076] The embodiments of the present invention described above are disclosed for the purpose of illustration, and those skilled in the art will recognize that various modifications, changes, and additions can be made within the spirit and scope of the present invention, and such modifications, changes, and additions should be considered to fall within the scope of the present patent claims.

[0077]

[0078] <Explanation of symbols>

[0079] 200: First antenna substrate

[0080] 202: First grid substrate

[0081] 204: Multiple first-radiation patches

[0082] 206: Multiple first conductor guide rings

[0083] 208: First ground line formation layer

[0084] 210,212: No. 1-1 and No. 1-2 power supply lines

[0085] 214,216: Prepregs 1-1 and 1-2

[0086] 220: Multiple first open cavities

[0087] The present invention relates to an array antenna, and can provide a phased array antenna capable of multi-polarization wide-angle beam scanning that can expand the beam width of an array antenna configured by arranging a plurality of patch antennas while improving the mutual interference phenomenon caused by components provided for beam width expansion.

[0088] Furthermore, the phased array antenna is small, lightweight, and easy to manufacture, and boasts uniform signal radiation characteristics and a low price. These advantages make the phased array antenna applicable to a variety of communication devices.

Claims

1. An antenna substrate that forms a flat structure of a flat antenna and forms electrical characteristics; A plurality of open cavities formed on the upper surface of the antenna substrate; A plurality of radiating patches arranged and mounted on the upper surface of the antenna substrate exposed by the plurality of open cavities; A grid substrate positioned on the upper surface of the antenna substrate, wherein the bulkheads are formed to intersect each other at a predetermined angle to form the plurality of open cavities; Conductor guide rings positioned on the upper surface of the grid substrate and formed at each of the intersection areas where the bulkheads intersect each other; A ground line forming layer located on the lower surface of the antenna substrate and forming a ground for the plurality of radiating patches; and A phased array antenna capable of multi-polarization wide-angle beam scanning, comprising a plurality of feed lines supplying multiple power sources to the plurality of radiating patches.

2. An antenna substrate that forms a flat structure of a flat antenna and forms electrical characteristics; A plurality of open cavities formed on the upper surface of the antenna substrate; A plurality of radiating patches arranged and mounted on the upper surface of the antenna substrate exposed by the plurality of open cavities; A grid substrate located on the upper surface of the antenna substrate, wherein the bulkheads are formed to intersect each other to form the plurality of open cavities; Conductor guide rings positioned on the upper surface of the grid substrate and formed at each of the intersection areas where the bulkheads intersect each other; A ground line forming layer located on the lower surface of the antenna substrate and forming a ground for the plurality of radiating patches; and It is composed of a plurality of power supply lines that supply multiple power to the above plurality of radiating patches; A phased array antenna capable of multi-polarization wide-angle beam scanning, wherein the size of the open cavity is set differently in the central and edge regions of the antenna substrate.

3. In paragraph 1 or 2, A phased array antenna capable of multi-polarization wide-angle beam scanning, wherein the plurality of feed lines are connected to each of the plurality of radiating patches through the ground line forming layer and the insulated holes formed in the antenna substrate.

4. In paragraph 1 or 2, The above multiple power supply lines are located in a power supply line formation layer located on the lower surface of the ground line formation layer, The terminal portions of the above plurality of power supply lines are arranged to be located at preset points on the lower surface of the above plurality of radiating patches, A phased array antenna capable of multi-polarization wide-angle beam scanning, in which a cavity is formed in each of predetermined regions of the ground line forming layer corresponding to the terminal portion of the plurality of above-mentioned power supply lines.

5. In paragraph 1 or 2, A phased array antenna capable of multi-polarization wide-angle beam scanning, wherein the thickness and width of the grid substrate in each of the intersection areas where the above-mentioned bulkheads intersect are determined differently according to the number of intersecting bulkheads in each intersection area.

6. In paragraph 1 or 2, The thickness and width of each of the above conductor guide rings are: A phased array antenna capable of multi-polarization wide-angle beam scanning, the number of intersecting baffles being determined differently in the cross-section of the grid substrate on which each conductor guide ring is formed.

7. In paragraph 1 or 2, A phased array antenna capable of multi-polarization optical beam scanning, wherein each of the conductor guide rings is formed to be a predetermined length in a direction that follows each of the intersecting bulkheads in the intersection area.

8. In paragraph 7, A phased array antenna capable of multi-polarization optical beam scanning, wherein the length of each of the conductor guide rings is determined differently depending on the number of intersecting partitions in the intersection area of ​​the grid substrate on which each conductor guide ring is formed.

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