Antenna device and feed line including air strip line

Abstract

An antenna device capable of suppressing deterioration of characteristics is provided. [Solution] The antenna device includes a plate, a first dielectric plate engaged with one side of the plate, a plurality of radiating elements arranged along a first direction on the first dielectric plate, and a plurality of first feed lines having an air stripline structure configured to feed the plurality of radiating elements, wherein the first dielectric plate includes a first groove configured to penetrate the upper and lower surfaces and allow the first feed line to float, and the first feed line is configured to float in the first groove.

Description

[Technical Field]

[0001] The present disclosure relates to air striplines and antenna devices including air striplines. [Background technology]

[0002] The material described in this section merely provides background information related to the present disclosure and may not constitute prior art.

[0003] The antenna device includes a plate, a radiating element, and a feed line for feeding the radiating element. The size of the radiating element varies depending on the operating frequency. For example, the higher the operating frequency, the smaller the size of the radiating element.

[0004] A large number of feed lines are printed on the substrate, but since the substrate is made of a PCB material (e.g., FR4 material) having a certain dielectric constant, the large number of printed feed lines increases insertion loss, degrading the performance of the antenna device.

[0005] Losses in a feed line can be divided into conductor losses in the conductor through which the signal flows and dielectric losses in the dielectric surrounding the conductor. These losses directly reduce the gain of the antenna device. To improve the gain of an antenna device, loss must be improved, and since changing or modifying the medium is relatively advantageous, improving dielectric loss is effective.

[0006] A typical feed line used to improve dielectric loss is an air-strip line structure, which refers to a feed line structure in which the dielectric portion is embodied as air.

[0007] In a feed line with an air stripline structure, the dielectric loss is close to 0 because the conductor is surrounded by air. Therefore, when a feed line with an air stripline structure is used, the dielectric loss can be reduced and the gain of the antenna device can be increased.

[0008] In a conventional air stripline structure, the impedance is varied by adjusting the width of the feed line. However, because the width of the feed line is wider in a conventional air stripline structure at the same impedance compared to the PCB type, there are design limitations to how much the impedance can be varied by adjusting the width of the feed line in an antenna device.

[0009] Furthermore, when the width of the feeder line is adjusted, a step occurs between the feeder lines during processing, which causes a problem of degrading the characteristics of the antenna device. Summary of the Invention [Problem to be solved by the invention]

[0010] The antenna device according to one embodiment adjusts the distance between the feed line and the dielectric plate and the thickness of the dielectric plate.

[0011] In the antenna device according to one embodiment, the change in width of the feed line is small, and only the structure of the dielectric is changed to form a circuit.

[0012] The problems to be solved by the present invention are not limited to those mentioned above, and other problems not mentioned will be clearly understood by those skilled in the art from the following description. [Means for solving the problem]

[0013] According to one embodiment of the present disclosure, there is provided an antenna device including: a plate; a first dielectric plate engaged with one side of the plate; a plurality of radiating elements arranged on the first dielectric plate along a first direction; and a plurality of first feed lines having an air stripline structure configured to feed the plurality of radiating elements, wherein the first feed lines include first grooves that are penetrated on the upper and lower surfaces and configured to allow the first feed lines to float, and the first feed lines are configured to float in the first grooves.

[0014] According to one embodiment of the present disclosure, there is provided a feeder line having an air stripline structure for feeding a radiating element of an antenna device, the feeder line including a dielectric plate, a groove formed by penetrating an upper surface and a lower surface of the dielectric plate, and a line portion configured to float at a predetermined distance from a side wall of the groove. [Effects of the Invention]

[0015] According to one embodiment, the antenna device has an advantage that the impedance can be varied by adjusting the distance between the feed line and the dielectric plate and the thickness of the dielectric plate.

[0016] According to one embodiment, the antenna device has an effect of minimizing steps that occur when manufacturing the feed line by reducing changes in the width of the feed line. [Brief explanation of the drawings]

[0017] [Figure 1] 1 is an engagement perspective view of an antenna device according to an embodiment of the present disclosure. [Figure 2] FIG. 1 is an exploded perspective view of an antenna device according to an embodiment of the present disclosure. [Figure 3] FIG. 2 is an enlarged top view of part B in FIG. [Figure 4] 2 is a cross-sectional view taken along the line AA′ of FIG. 1 and a graph showing the change in impedance depending on the distance between the feed line and the dielectric plate. [Figure 5]10 is a graph showing a dielectric portion added to a lower end of a feed line according to an embodiment of the present disclosure and a change in impedance depending on the thickness of the dielectric portion; [Figure 6] FIG. 10 is an engagement perspective view of an antenna device according to another embodiment of the present disclosure. [Figure 7] FIG. 10 is an exploded perspective view of an antenna device according to another embodiment of the present disclosure. [Figure 8] FIG. 10 is a bottom view of an antenna device according to another embodiment of the present disclosure. [Figure 9] FIG. 2 is a diagram illustrating a connection relationship of a power supply line according to an embodiment of the present disclosure. DETAILED DESCRIPTION OF THE INVENTION

[0018] Some embodiments of the present disclosure will be described in detail below with reference to the accompanying drawings. When assigning reference numerals to components in each drawing, it should be noted that the same reference numerals are used for the same components even if they are displayed in different drawings. Furthermore, when describing the present disclosure, if a detailed description of related known structures or functions is deemed to obscure the gist of the present disclosure, such a detailed description will be omitted.

[0019] In describing components of the embodiments of the present disclosure, reference numerals such as 1, 2, i), ii), a), b) are used. Such reference numerals are used only to distinguish the components from other components, and do not limit the essence or order or sequence of the components. In this specification, when a part is said to "include" or "comprise" a certain component, this does not mean that other components are excluded, but that the part may further include other components, unless explicitly stated to the contrary.

[0020] In this specification, "top" or "upper" refers to the direction in which the radiating elements 14, 24 of the antenna devices 1, 2 are engaged, and "bottom" or "lower" refers to the direction in which the plates 11, 21 of the antenna devices 1, 2 are engaged.

[0021] FIG. 1 is an engagement perspective view of an antenna device according to an embodiment of the present disclosure.

[0022] FIG. 2 is an exploded perspective view of an antenna apparatus according to an embodiment of the present disclosure.

[0023] Referring to Figures 1 and 2, an antenna device 1 includes all or part of a plate 11, a first dielectric plate 12, a first feed line 13, and a plurality of radiation elements 14.

[0024] A first dielectric plate 12 is engaged with the upper surface of the plate 11. The plate 11 is made of a metal material and provides a ground plane for the radiating element 14 of the antenna device 1.

[0025] The plate 11 includes a plurality of holes 111. The plurality of holes 111 are formed to penetrate the plate 11. The plurality of holes 111 include a plurality of first holes and a plurality of second holes. Protrusions (not shown) of the first dielectric plate 12 are inserted into the plurality of first holes to engage the plate 11 and the first dielectric plate 12. An RF filter, a connector, a port, etc. are engaged into the plurality of second holes to connect to the antenna device 1.

[0026] The first dielectric plate 12 includes all or part of a first groove 121, a second groove 122, a first support unit 123, a first connect unit 124, a second connect unit 125, and a protrusion (not shown).

[0027] The first dielectric plate 12 is formed by injection on the upper surface of the plate 11. Therefore, all or some of the components of the first dielectric plate 12, including the first groove 121, the second groove 122, the first support portion 123, the first connecting portion 124, the second connecting portion 125, and the protrusion, are integrally formed. In this case, the first dielectric plate 12 is made of a dielectric material, such as a plastic material.

[0028] The first groove 121 is formed to penetrate the upper and lower surfaces of the first dielectric plate 12. The first groove 121 extends longitudinally along a first direction, which is parallel to the Y-axis in FIG. 1. The first groove 121 is formed to correspond to the shape of the first feed line 13, which will be described later, so that the first feed line 13 is suspended in the first groove 121.

[0029] The first feed line 13 is configured to float in the first groove 121. For example, the first feed line 13 floats at a predetermined distance from the sidewall of the first groove 121. The first feed line 13 also floats at a predetermined distance from the plate 11 engaged with the lower surface of the first dielectric plate 12.

[0030] Air is filled in the space between the first feed line 13 and the sidewall of the first groove 121 and / or the plate 11. That is, the first feed line 13 has an air-strip line structure. The air-strip line structure is a general strip line structure in which the dielectric portion is embodied with air.

[0031] The feed line 13 with the air stripline structure has a dielectric loss close to 0 because the conductor is surrounded by air. Therefore, by reducing the dielectric loss, the gain of the antenna device 1 can be increased.

[0032] The first support portions 123 are formed in the first grooves 121. The first support portions 123 are formed at the lower ends of the first grooves 121 and connect opposing side walls of the first grooves 121. The first support portions 123 are connected to the first grooves 121 and formed integrally with the first dielectric plate 12, and the thickness of the first support portions 123 is thinner than the thickness of the first grooves 121. The first support portions 123 are formed in the first grooves 121 at predetermined intervals along the first direction.

[0033] The first feed line 13 is engaged with the upper surfaces of the plurality of first supports 123 formed at predetermined intervals. By engaging the first feed line 13 with the upper surfaces of the first supports 123, the first feed line 13 can be suspended at a predetermined interval from the sidewall of the first groove 121 and / or the plate 11. In other words, by using the first supports 123, it is possible to form an air stripline structure using only a minimum amount of dielectric.

[0034] The second grooves 122 are formed in at least a portion of the first dielectric plate 12 where the first grooves 121 are not formed. The second grooves 122 are formed so as to penetrate the upper and lower surfaces of the first dielectric plate 12. The second grooves 122 are formed regularly having a predetermined pattern. For example, the second grooves 122 are formed in a honeycomb pattern. However, this is not limiting, and the second grooves 122 may be formed irregularly. Forming a plurality of second grooves 122 in the first dielectric plate 12 has the effect of reducing the weight of the first dielectric plate 12 and reducing the manufacturing cost of the antenna device 1.

[0035] The first connecting portions 124 are formed to protrude from the upper surface of the first dielectric plate 12. The first connecting portions 124 connect the first dielectric plate 12 and the radiating element 14. Four first connecting portions 124 are formed at predetermined intervals to connect the first dielectric plate 12 and the radiating element 14. For example, the four first connecting portions 124 are arranged to form a rectangular shape. However, the present invention is not limited to this, and the number and arrangement of the first connecting portions 124 can be variously designed as needed.

[0036] The second connecting portion 125 is formed to protrude from the upper surface of the first dielectric plate 12. The second connecting portion 125 connects the first dielectric plate 12 and the first feed line 13. The second connecting portion 125 is formed at the lower end of the radiating element 14 so that the first feed line 13 can feed the radiating element 14. That is, the height of the second connecting portion 125 may be lower than the height of the first connecting portion 124. The second connecting portions 125 are formed in pairs to connect a pair of first feed lines 13. However, the present invention is not limited thereto, and the number and arrangement of the second connecting portions 125 may be variously designed as needed.

[0037] The protrusions are formed on the lower surface of the first dielectric plate 12. The protrusions are formed so as to protrude from the lower surface of the first dielectric plate 12, and are inserted into the holes 111 of the plate 11. When the protrusions are inserted into the holes 111, the first dielectric plate 12 and the plate 11 are engaged. A plurality of protrusions are formed corresponding to the positions of the holes 111 of the plate 11. The plurality of protrusions are formed integrally with the first dielectric plate 12.

[0038] The radiating elements 14 are arranged in a line along a first direction, which is parallel to the Y-axis in FIG. 1, forming an antenna column.

[0039] If the spacing between one radiating element 14 and its adjacent radiating element 14 in an antenna array is greater than 1 lambda, where lambda is the intermediate frequency of the operating frequency band, undesirable grating lobes will appear in the radiation pattern.

[0040] Therefore, the first directional spacing between one radiating element 14 and its adjacent radiating element 14 is preferably less than 1 lambda, however, the present disclosure is not limited in this respect and the first directional spacing between two radiating elements 14 may have a value outside the ranges mentioned above.

[0041] The antenna device 1 includes a plurality of antenna arrays arranged along a second direction perpendicular to the first direction on the plate 11. Here, the second direction is parallel to the X-axis in FIG.

[0042] The multiple radiating elements 14 are configured to realize dual polarization. A pair of first feed lines 13 is configured so that the radiating elements 14 realize dual polarization. The pair of first feed lines 13 is arranged symmetrically. For example, two types of polarized signals, +45 degrees and -45 degrees, are radiated from one radiating element 14. However, the present disclosure is not limited thereto, and the radiating elements 14 may be configured to realize single polarization or quadruple polarization.

[0043] The first feed line 13 is configured to feed the plurality of radiating elements 14. That is, the plurality of radiating elements 14 use the first feed line 13 to transmit and receive signals and to receive power.

[0044] The first feed line 13 includes a main line region 131, a coupling line region 132, and an input / output region 133. The main line region 131 extends longitudinally along a first direction. One end of the coupling line region 132 is connected to the second coupling portion 125, and the other end is connected to the main line region 131. The coupling line region 132 is formed by bending the main line region 131 at a predetermined angle. For example, the coupling line region 132 is formed by bending the main line region 131 in an V-shape. However, the present disclosure is not limited thereto, and the coupling line region 132 may be formed at an angle.

[0045] The coupling line regions 132 branch off from the main line region 131, and each coupling line region 132 is connected to a corresponding radiating element 14. The coupling line region 132 may be connected to the radiating element 14 directly or via a coupling method.

[0046] The input / output area 133 branches off from the main line area 131 and connects the RF circuit to the main line area 131. One end of the input / output area 133 is connected to the main line area 131, and the other end of the input / output area 133 is connected to the RF circuit equipped with a filter, a power amplifier, a power supply unit, etc.

[0047] The RF circuit may be provided inside the antenna device 1, or may be provided in a device external to the antenna device 1, such as an RRH (remote radio head). When the RF circuit is provided in an external device such as an RRH, the antenna device 1 and the external device provided with the RF circuit are connected using an RF cable, a connector, or the like.

[0048] The input / output area 133 uses the main line area 131 and the coupling line area 132 to transmit signals transmitted from the RF circuit to the plurality of radiating elements 14 and to transmit signals received from the plurality of radiating elements 14 to the RF circuit. The input / output area 133 also uses the main line area 131 and the coupling line area 132 to supply power to the plurality of radiating elements 14.

[0049] In order to minimize the phase difference or power loss caused by the increased length of the first feed line 13 , the input / output region 133 is located near the middle region of the main line region 131 .

[0050] Meanwhile, in the air stripline structure, the dielectric portion is realized by air, so the length of the first feed line 13 for inputting the same phase to the plurality of radiating elements 14 becomes relatively long.

[0051] For example, when the intermediate frequency of the operating frequency band is lambda, the length of the first feed line 13 required to input signals of the same phase to the first radiating element and the second radiating element adjacent to the first radiating element is 1 lambda. That is, the length of the first feed line 13 from the first coupling line area to the second coupling line area adjacent to the first coupling line area is 1 lambda.

[0052] As described above, in order to minimize the occurrence of grating lobes, it is preferable that the first directional spacing between two adjacent radiating elements 14 is less than 1 lambda. In this case, the length of the first feed line connecting the two adjacent radiating elements 14 becomes longer than the spacing between the two adjacent radiating elements 14, which becomes a problem.

[0053] To solve this problem, the main line region 131 includes a delay line. The delay line is formed in at least a part of the main line region 131. The delay line is a region formed by bending a part of the main line region 131, and partially compensates for the increased length of the first feed line 13.

[0054] In a pair of first feed lines 13, the delay line may have a concave or convex shape toward the other first feed line 13. For example, the delay line may have a U-shape, but the present disclosure is not limited thereto.

[0055] The main line region 131 includes a delay line, which prevents the first direction interval between two adjacent radiating elements 14 from becoming too large. Therefore, the antenna device 1 can be made compact, and the occurrence of undesirable grating lobes can be minimized.

[0056] FIG. 3 is an enlarged top view of part B in FIG.

[0057] 3 , the first feed line 13 of the antenna device 1 of the present disclosure is configured to float in the first groove 121. The first feed line 13 floats at a predetermined distance from the sidewall of the first groove 121. The first support portion 123 supports the first feed line 13 so that the first feed line 13 floats at a predetermined distance from the sidewall of the first groove 121.

[0058] The antenna device 1 of the present disclosure can vary impedance by adjusting the gap between the first feed line 13 and the sidewall of the first groove 121 while maintaining a constant width of the first feed line 13. The width of the first feed line 13 is uniform. Therefore, unlike a conventional air stripline structure in which the width of the feed line is adjusted to vary the impedance, this has the effect of minimizing steps that occur during the fabrication of the first feed line 13. Therefore, the antenna device 1 of the present disclosure can also minimize the problem of burrs that occur during the fabrication of the air stripline structure.

[0059] FIG. 4 is a cross-sectional view taken along the line AA′ in FIG. 1 and a graph showing the change in impedance depending on the distance between the feed line and the dielectric plate.

[0060] 4, the antenna device 1 of the present disclosure is capable of adjusting the distance between the first feed line 13 and the sidewall of the first groove 121. Since the width of the first feed line 13 is constant, the width of the first groove 121 must be adjusted to adjust the distance between the first feed line 13 and the sidewall of the first groove 121. For example, the thickness of the sidewall of the first groove 121 can be adjusted to increase or decrease the distance between the first feed line 13 and the sidewall of the first groove 121. The width of the first groove 121 is designed using a preset value during the manufacturing process of the first dielectric plate 12.

[0061] 4, it can be seen that the impedance increases as the distance (clearance) between the first feed line 13 and the sidewall of the first groove 121 increases. That is, the antenna device 1 of the present disclosure has the effect of adjusting the permittivity and impedance by adjusting the distance between the first feed line 13 and the sidewall of the first groove 121.

[0062] FIG. 5 is a graph showing a dielectric portion added to the lower end of a feed line according to an embodiment of the present disclosure and a change in impedance depending on the thickness of the dielectric portion.

[0063] Referring to FIG. 5, the first dielectric plate 12 of the antenna device 1 of the present disclosure further includes a dielectric portion 126 .

[0064] The dielectric portion 126 is formed in the first groove 121. The dielectric portion 126 is formed at the lower end of the first groove 121 and connects opposing side walls of the first groove 121. The dielectric portion 126 is connected to the first groove 121 and is formed integrally with the first dielectric plate 12, and the thickness of the dielectric portion 126 is thinner than the thickness of the first groove 121.

[0065] The dielectric portion 126 is formed in at least a portion of the first groove 121 where the first support portion 123 is not formed. The dielectric portion 126 may be formed continuously or regularly at predetermined intervals. The dielectric portion 126 is formed at the lower end of the first dielectric plate 12 and is formed to have a predetermined interval from the first feed line 13. The shape and thickness of the dielectric portion 126 may be variously designed as needed.

[0066] 5, it can be seen that the impedance varies depending on the distance between the first feed line 13 and the dielectric portion 126. It can be seen that the impedance increases as the thickness t of the dielectric portion 126 increases, that is, as the distance between the first feed line 13 and the dielectric portion 126 decreases. In other words, the antenna device 1 of the present disclosure has the effect of being able to adjust the dielectric constant and impedance by adjusting the distance between the first feed line 13 and the dielectric portion 126.

[0067] FIG. 6 is an engagement perspective view of an antenna device according to another embodiment of the present disclosure.

[0068] FIG. 7 is an exploded perspective view of an antenna device according to another embodiment of the present disclosure.

[0069] FIG. 8 is a bottom view of an antenna device according to another embodiment of the present disclosure.

[0070] Referring to Figures 6 to 8, an antenna device 2 according to another embodiment of the present disclosure includes all or part of a plate 21, a first dielectric plate 22, a first feed line 23, a plurality of radiating elements 14, a second dielectric plate 25, and a second feed line 26.

[0071] The first dielectric plate 22 includes all or part of a first groove 221, a second groove 222, a first support portion 223, a first connecting portion 224, and a second connecting portion 225. The first feed line 23 includes a main line region 231, a connecting line region 232, and an input / output region 233.

[0072] Among the descriptions of the plate 21, the first dielectric plate 22, the first feed line 23, the plurality of radiating elements 14, and each configuration of the antenna device 2 according to another embodiment of the present disclosure, the descriptions of the parts that overlap with the antenna device 1 according to the embodiment of the present disclosure will be omitted as they have already been described. Note that, for convenience of explanation, only one antenna array is arranged in Figures 6 to 8, but this is not limiting and multiple antenna arrays may be arranged.

[0073] A first dielectric plate 22 is engaged with the upper surface of the antenna device 2, and a second dielectric plate 25 is engaged with the lower surface. The first dielectric plate 22 and the second dielectric plate 25 are formed by double injection on the upper and lower surfaces of the plate 21.

[0074] The plate 21 includes a variable circuit board 211 and an engaging portion 212. The variable circuit board 211 is a type of printed circuit board, and a variable circuit having at least one disconnection point that can change the frequency phase using the feed lines 23 and 26 is patterned on its upper surface. The variable circuit board 211 is electrically connected to the first feed line 23 and / or the second feed line 26. The engaging portion 212 engages the plate 21, the first dielectric plate 22, and the second dielectric plate 25. Each of the engaging portions 212 may have a pair of bolt and nut structure, but is not limited thereto, and may have any structure that can engage the plate 21, the first dielectric plate 22, and the second dielectric plate 25.

[0075] The second dielectric plate 25 includes all or part of the third groove 251 and the fourth groove 252. The third groove 251 and the fourth groove 252 are integrally formed in the second dielectric plate 25. In this case, the second dielectric plate 25 is made of a dielectric material, for example, a plastic material.

[0076] The third groove 251 is formed to penetrate the upper and lower surfaces of the second dielectric plate 25. The third groove 251 extends longitudinally along a first direction, which is parallel to the Y-axis in FIG. 7. The third groove 251 is formed to correspond to the shape of the second feed line 26 so that the second feed line 26 is suspended in the third groove 251.

[0077] The second feed line 26 is configured to float in the third groove 251. For example, the second feed line 26 floats at a predetermined distance from the sidewall of the third groove 251. The second feed line 26 also floats at a predetermined distance from the plate 21 engaged with the lower surface of the second dielectric plate 25.

[0078] The space between the second feed line 26 and the sidewall of the third groove 251 and / or the plate 21 is filled with air. That is, the second feed line 26 has an air stripline structure similar to the first feed line 23.

[0079] The fourth grooves 252 are formed in at least a portion of the second dielectric plate 25 where the third grooves 251 are not formed. The fourth grooves 252 are formed so as to penetrate the upper and lower surfaces of the second dielectric plate 25. The fourth grooves 252 are formed regularly having a predetermined pattern. For example, the fourth grooves 252 are formed in a honeycomb pattern. However, this is not limiting, and the fourth grooves 252 may be formed irregularly. Forming a plurality of fourth grooves 252 in the second dielectric plate 25 has the effect of reducing the weight of the second dielectric plate 25 and reducing the manufacturing cost of the antenna device 2.

[0080] Unlike the first feed line 23, the second feed line 26 does not have to have a bent shape. The second feed lines 26 are arranged in a pair symmetrically to each other. The second feed lines 26 extend long along the first direction. The second feed line 26 is used when length compensation using the delay line of the first feed line 23 is not possible. By using the second feed line 26, a parallel feed design, which will be described later, can be applied. For example, one end of the second feed line 26 is connected to the input / output region 233 of the first feed line 23, and the other end is connected to an RF circuit. The other end of the second feed line 26 is connected to an RF circuit equipped with a filter, a power amplifier, a power supply unit, etc.

[0081] FIG. 9 is a diagram illustrating a connection relationship of a power supply line according to an embodiment of the present disclosure.

[0082] 9(a) is a schematic diagram of a circuit when multiple radiating elements 14, 24 are fed in series. In the case of series feeding, the spacing between every two adjacent radiating elements 14, 24 differs by 1 lambda. In the case of series feeding, the phase difference between the multiple radiating elements 14, 24 on the phase slope is large, which can cause side lobes to occur, making it difficult to achieve a wide bandwidth for the antenna devices 1, 2.

[0083] 9(b) is a schematic diagram showing a circuit diagram when multiple radiating elements 14, 24 are fed in parallel. In the case of parallel feeding, the phases of two adjacent radiating elements 14, 24 are the same. In the case of parallel feeding, the phase difference on the phase slope is gentle, so that the antenna devices 1, 2 can achieve a wide bandwidth.

[0084] The series feeding and the parallel feeding are respectively applied to the antenna device 1 according to one embodiment of the present disclosure and the antenna device 2 according to another embodiment. However, without being limited to this, the series feeding may be applied to the antenna device 2 according to another embodiment, and the parallel feeding may be applied to the antenna device 1 according to one embodiment. Furthermore, the series feeding and the parallel feeding may be combined and applied to the antenna device 1 according to one embodiment of the present disclosure and the antenna device 2 according to another embodiment.

[0085] The above description merely exemplifies the technical concept of the present embodiment, and various modifications and variations may be made by a person skilled in the art without departing from the essential characteristics of the present embodiment. Therefore, the present embodiment is intended to illustrate, rather than limit, the technical concept of the present embodiment, and the scope of the technical concept of the present embodiment is not limited by such an embodiment. The scope of protection of the present embodiment should be interpreted by the scope of the claims, and all technical concepts within the scope equivalent thereto should be interpreted as being included in the scope of rights of the present embodiment.

[0086] [CROSS-REFERENCE TO RELATED APPLICATION] This patent application claims priority to patent application number 10-2022-0002899 filed in Korea on January 7, 2022, and patent application number 10-2022-0041049 filed in Korea on April 1, 2022, the entire contents of which are incorporated herein by reference. [Explanation of symbols]

[0087] 1 antenna device, 11 plates 111 hole, 12 first dielectric plate 121 first groove, 122 second groove 123 first support portion, 124 first connecting portion 125 second coupling portion, 13 first power supply line 131 Main track area, 132 Connecting track area 133 input / output area, 14 radiating elements 2 antenna devices, 21 plates 211 hole, 22 first dielectric plate 221 First groove, 222 Second groove 223 first support portion, 224 first connecting portion 225 second coupling portion, 23 first power supply line 231 Main track area, 232 Connecting track area 233 input / output area, 24 radiating elements 25 second dielectric plate, 251 third groove

Claims

1. Plate and a first dielectric plate engaged with one side of the plate; a plurality of radiating elements arranged on the first dielectric plate along a first direction; a plurality of first feed lines configured to feed the plurality of radiating elements and having an air stripline structure; an antenna device, characterized in that the first dielectric plate includes a first groove through which an upper surface and a lower surface are penetrated and which is configured to allow the first feed line to float, and the first feed line is configured to float in the first groove.

2. The first power supply line includes:

2. The antenna device according to claim 1, wherein the antenna device is suspended at a predetermined distance from the sidewall of the first groove.

3. The first dielectric plate comprises:

2. The antenna device according to claim 1, further comprising a dielectric portion between said first feed line and said plate.

4. The first groove is 2. The antenna device according to claim 1, having a shape corresponding to a shape of said first feed line.

5. The first dielectric plate comprises:

2. The antenna device according to claim 1, further comprising one or more first support portions formed in at least a part of the first groove and supporting the first feed line.

6. The first support portion includes:

6. The antenna device according to claim 5, wherein the first and second dielectric plates are arranged at predetermined intervals and are formed integrally with the first dielectric plate.

7. The first dielectric plate comprises: further comprising a first coupling portion that couples the first dielectric plate to the radiating element and a second coupling portion that couples the first dielectric plate to the first feed line; 2. The antenna device according to claim 1, wherein the first connecting portion and the second connecting portion are formed integrally with the first dielectric plate.

8. 2. The antenna device according to claim 1, further comprising: a second dielectric plate engaged with the other surface of the plate; and a plurality of second feed lines configured to transmit signals to the first feed line.

9. The second dielectric plate comprises:

9. The antenna device according to claim 8, further comprising a third groove configured to penetrate the upper and lower surfaces and to allow the second feed line to be placed therein, the second feed line being configured to float in the third groove.

10. The first dielectric plate and the second dielectric plate are 9. The antenna device according to claim 8, characterized in that it is injection molded.

11. The first power supply line includes:

2. The antenna device according to claim 1, wherein the width is uniform.

12. In a feeder line having an air stripline structure that feeds power to a radiating element of an antenna device, a dielectric plate; a groove formed by penetrating the upper and lower surfaces of the dielectric plate; a line portion configured to float at a predetermined interval from a side wall of the groove, The power supply line further includes one or more support portions formed in at least a portion of the groove and supporting the line portion.

13. The groove is formed to extend in a first direction, The power supply line according to claim 12, wherein the support portions are arranged at predetermined intervals along the first direction.

14. The line portion is 13. The feeder line according to claim 12, wherein the width is uniform.

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