Antenna equipment

Abstract

An antenna device according to one embodiment includes a substrate and a waveguide antenna disposed in close proximity to at least a portion of the substrate, wherein the waveguide antenna has a field of view (FoV) in a first direction and a field of view in a second direction different from the first direction, and may comprise at least two layers.

Description

Technical Field

[0001] The present invention relates to an antenna device and to a waveguide antenna structure capable of antenna radiation in both the front and rear directions.

Background Art

[0002] With the development of communication technology, devices equipped with various antennas have become widely popular. Such devices can wirelessly transmit and receive data or signals via antennas.

[0003] Antenna devices can serve as a means of communication that can replace mechanically fragile and inconvenient wired cables between devices through wireless connections. Such devices have spread to digital equipment, and various forms are being studied.

[0004] In the electrical equipment field, various forms of antenna modules are also used. In particular, radar systems have been developed for purposes such as object detection. In such a trend, there is a demand for radar modules that minimize dead zones.

Summary of the Invention

Means for Solving the Problems

[0005] An antenna device according to an embodiment includes a substrate and a waveguide antenna disposed in proximity to at least a part of the substrate. The waveguide antenna has a first field of view (FoV) centered on a first direction and a second field of view centered on a second direction different from the first direction, and can include at least two layers.

[0006] The first field of view or the second field of view can be an angle of 0° to 180°. The second field of view can at least partially overlap with the first field of view. The first direction and the second direction can be opposite to each other.

[0007] In one embodiment, the at least two layers may include a first waveguide layer and a second waveguide layer disposed on the first waveguide layer.

[0008] In one embodiment, the at least two layers may further include a first backed cavity layer positioned above the first waveguide layer or the second waveguide layer, and a second backed cavity layer positioned below the first waveguide layer or the second waveguide layer.

[0009] In one embodiment, the first back cavity layer and the second back cavity layer may be arranged in opposite directions relative to the first waveguide layer or the second waveguide layer.

[0010] In one embodiment, the at least two layers may further include a first radiating layer positioned above the first back cavity layer and a second radiating layer positioned below the second back cavity layer.

[0011] In one embodiment, the first radiating layer and the second radiating layer may be arranged in opposite directions relative to the first waveguide layer or the second waveguide layer.

[0012] In one embodiment, at least a portion of the first waveguide layer or at least a portion of the second waveguide layer may extend in the first direction or the second direction.

[0013] In one embodiment, at least a portion of the first waveguide layer or at least a portion of the second waveguide layer may extend perpendicular to the first direction or perpendicular to the second direction. The first direction or the second direction may be perpendicular to the longitudinal direction of the first waveguide layer.

[0014] In one embodiment, the waveguide antenna may be arranged to surround at least a portion of the substrate.

[0015] In one embodiment, the second radiating layer may be positioned in close proximity to the first side surface of the substrate's outer casing.

[0016] In one embodiment, the at least two layers further include a third buck cavity layer disposed below the first waveguide layer or the second waveguide layer, and a third radiating layer disposed below the third buck cavity layer, wherein the third buck cavity layer may be disposed in close proximity to a second side of the substrate outer casing that is different from the first side.

[0017] In one embodiment, the waveguide antenna may be arranged so as to pass through at least a portion of the substrate.

[0018] In one embodiment, the second radiating layer may be positioned in close proximity to one of the ends of the substrate.

[0019] In one embodiment, the at least two layers further include a third buck cavity layer disposed below the first waveguide layer or the second waveguide layer, and a third radiating layer disposed below the third buck cavity layer, wherein the third radiating layer may be disposed in close proximity to the other end of the substrate.

[0020] The substrate according to one embodiment may include a printed circuit board (PCB).

[0021] In one embodiment, the length of at least a portion of the first radiating layer may be smaller than the length of at least a portion of the first waveguide layer or the length of at least a portion of the second waveguide layer.

[0022] The horizontal length of the first radiating layer corresponding to the horizontal length of the upper part of the waveguide antenna according to an embodiment may be smaller than the maximum horizontal length of the first waveguide layer or the maximum horizontal length of the second waveguide layer.

[0023] The length of at least a part of the second radiating layer according to an embodiment may be smaller than the length of at least a part of the first radiating layer.

[0024] When the first viewing angle in the first direction and the second viewing angle in the second direction according to an embodiment are continuous, the total viewing angle can be an angle of 360° or less.

Brief Description of the Drawings

[0025] [Figure 1] It is a diagram showing an antenna device according to an embodiment.

[0026] [Figure 2] It is a diagram showing the structure of an antenna device having a bidirectional FOV according to an embodiment.

[0027] [Figure 3] It is a diagram showing the structure of an antenna device having a bidirectional FOV according to an embodiment.

[0028] [Figure 4] It is a diagram showing the structure of an antenna device according to an embodiment.

[0029] [Figure 5] It is a diagram showing the structure of an antenna device according to an embodiment.

[0030] [Figure 6] It is a top view of an antenna device according to an embodiment.

[0031] [Figure 7] It is a bottom view of an antenna device according to an embodiment.

[0032] [Figure 8] This is a cross-sectional view of an antenna device according to one embodiment. [Modes for carrying out the invention]

[0033] The present invention can be modified in various ways and may have various embodiments; therefore, specific embodiments are illustrated and described in the drawings. However, this is not intended to limit the present invention to specific embodiments, but should be understood to include all modifications, equivalents, or substitutions that fall within the scope of the spirit and art of the present invention.

[0034] Terms including ordinal numbers such as "second," "first," etc., can be used to describe a variety of components, but the components are not limited by the terms. The terms are used solely for the purpose of distinguishing one component from another. For example, without departing from the scope of the invention, the second component can be named the first component, and similarly, the first component can be named the second component. The terms "and" and / or include either a combination of multiple related and described items or any of multiple related and described items.

[0035] When one component is referred to as being "linked" or "connected" to another component, it should be understood that it is directly linked to or may be connected to the other component, but that other components may be in between. On the other hand, when one component is referred to as being "directly linked" or "directly connected" to another component, it should be understood that there are no other components in between.

[0036] The terms used in this application are used solely to describe specific embodiments and are not intended to limit the invention. Singular expressions include plural expressions unless the context clearly indicates otherwise. In this application, terms such as “includes” or “having” are intended to specify the existence of features, figures, steps, actions, components, parts, or combinations thereof described in the specification, and should be understood not to preemptively exclude the existence or possibility of the presence or addition of one or more other features or figures, steps, actions, components, parts, or combinations thereof.

[0037] Unless otherwise defined, all terms used herein, including technical or scientific terms, have the same meaning as those generally understood by a person of ordinary skill in the art to which this invention pertains. Terms such as those defined in commonly used dictionaries should be interpreted as having the meaning consistent with their meaning in the context of the relevant art, and should not be interpreted in an ideal or overly formal sense unless expressly defined herein.

[0038] The embodiments will be described in detail below with reference to the attached drawings. Regardless of the reference numerals used in the drawings, identical or corresponding components will be given the same reference numerals, and redundant descriptions thereof will be omitted.

[0039] Referring to Figure 1, an antenna device according to one embodiment can be seen.

[0040] According to one embodiment, the antenna device may include a substrate 110 and a waveguide antenna 120 positioned in close proximity to at least a portion of the substrate 110.

[0041] The antenna device can provide a waveguide antenna configuration that significantly improves the field of view (FoV) by either penetrating the substrate or using the edge of the substrate as an antenna to the opposite side.

[0042] The antenna device may include at least a portion of a circuit board, an antenna, or an antenna module. The antenna device may include at least a portion of a vehicle component. The antenna device may be mounted on at least a portion of a vehicle. The antenna device may include at least a portion of an antenna used in a vehicle radar module.

[0043] The antenna device can provide a waveguide structure having an expanded field of view (FOV) on both sides.

[0044] The waveguide antenna 120 has a first field of view (FoV) in a first direction and a second field of view in a second direction different from the first direction, and may comprise at least two layers. Each of the at least two layers may contain multiple layers of the same material. At least a portion of the at least two layers may be made of different or the same material. In at least a portion of the cross-section of the waveguide antenna 120, each of the at least two layers may have different lengths.

[0045] The first field of view in the first direction or the second field of view in the second direction is an angle between 0° and 180°, and the second field of view in the second direction may follow at least a portion of the first field of view in the first direction or be in the opposite direction to the field of view in the first direction. If the first field of view in the first direction and the second field of view in the second direction are consecutive, the total field of view may be an angle of 360° or less. If the first field of view in the first direction and the second field of view in the second direction are each an angle of 180°, are in opposite directions to each other, and are consecutive, the total field of view may be 360°.

[0046] At least a portion of the waveguide antenna 120 may have empty space / unfilled areas, which has the effect of minimizing signal transmission loss. At least a portion of the waveguide antenna 120 (for example, areas that are not at least two layers or areas between at least two layers) may be filled with a dielectric (for example, an insulator such as plastic), which has the advantage of reducing the size by preventing the size from increasing at low frequencies.

[0047] The waveguide antenna 120 can have a size proportional to the frequency. In the case of a radar such as a 77GHz ADAS radar, the cross-section of the waveguide antenna 120 may have a width / height of approximately 2-1 mm and a horizontal length parallel to the top or bottom surface of approximately 10-100 mm.

[0048] According to one embodiment, at least two layers of the waveguide antenna 120 may include a first waveguide layer 141 and a second waveguide layer 142 positioned on the first waveguide layer 141.

[0049] According to one embodiment, at least two layers of the waveguide antenna 120 may further include a third waveguide layer (not shown) positioned on the second waveguide layer 142. If a third waveguide layer is further positioned, the configurations related to the second waveguide layer 142 described above or below may be applied to the third waveguide layer. For example, a configuration adjacent to the second waveguide layer 142 may become a configuration adjacent to the third waveguide layer, and a configuration positioned above / below the second waveguide layer 142 may be positioned above / below the third waveguide layer.

[0050] According to one embodiment, at least two layers of the waveguide antenna 120 may include a first backed cavity layer 131 positioned above a first waveguide layer 141 or a second waveguide layer 142, and a second backed cavity layer 132 positioned below the first waveguide layer 141 or the second waveguide layer 142.

[0051] According to one embodiment, the first back cavity layer 131 and the second back cavity layer 132 may be arranged in opposite directions relative to the first waveguide layer 141 or the second waveguide layer 142.

[0052] According to one embodiment, at least two layers of the waveguide antenna 120 may include a first radiating layer 121 positioned above a first buck cavity layer 131, and a second radiating layer 122 positioned below a second buck cavity layer 132.

[0053] According to one embodiment, the first radiating layer 121 and the second radiating layer 122 may be arranged in opposite directions relative to the first waveguide layer 141 or the second waveguide layer 142.

[0054] According to one embodiment, at least a portion of the first waveguide layer 141 or at least a portion of the second waveguide layer 142 may extend in a first direction (FOV direction) or a second direction (other FOV direction).

[0055] According to one embodiment, at least a portion of the first waveguide layer 141 or at least a portion of the second waveguide layer 142 may extend perpendicular to the first direction or perpendicular to the second direction.

[0056] According to one embodiment, the substrate 110 may include a printed circuit board (PCB).

[0057] According to one embodiment, the length of at least a portion of the first radiating layer 121 may be smaller than the length of at least a portion of the first waveguide layer 141 or the length of at least a portion of the second waveguide layer 142.

[0058] According to one embodiment, the horizontal length of the first radiating layer 121, which corresponds to the horizontal length of the upper part of the waveguide antenna 120, may be less than or equal to the maximum horizontal length of the first waveguide layer 141 or the maximum horizontal length of the second waveguide layer 142.

[0059] The maximum horizontal length of the first waveguide layer 141 or the second waveguide layer 142 may be between 10 and 100 mm, and the maximum height of the first waveguide layer 141 or the second waveguide layer 142 may be between 2 and 1 mm.

[0060] The horizontal length of the first radiating layer 121 may be 10 to 100 mm or less, and the height of the first radiating layer 121 may be 2 to less than 1 mm.

[0061] According to one embodiment, the length of at least a portion of the second radiating layer 122 may be smaller than the length of at least a portion of the first radiating layer 121.

[0062] According to one embodiment, the antenna device can significantly expand the radar field of view (FoV) using at least some of its components. The antenna device has the effect of reducing the number of radar modules, waveguide antennas (structures), or substrates such as PCBs in a system requiring multiple radars by using at least some of its components. The antenna device can be realized with radar modules having one or more antenna sections. This makes it possible to cover a wide range of FoV using fewer radar modules than in the prior art.

[0063] According to one embodiment, the antenna device may include / utilize at least four radiating slots, a T-junction, a waveguide, a coupling feed, and the like.

[0064] Referring to Figure 2, the structure of an antenna device having a bidirectional field of view according to one embodiment can be seen.

[0065] According to one embodiment, the waveguide antenna 220 may be arranged to surround at least a portion of the substrate 210.

[0066] The waveguide antenna 220 can utilize the outer casing of the substrate 210 to position the antenna radiation aperture on the side or back of the substrate 210.

[0067] According to one embodiment, the second radiating layer 222, which is located on the opposite side of the first radiating layer 221, may be positioned close to the first side (e.g., the left side) of the outer casing of the substrate 210.

[0068] According to one embodiment, at least two layers of the waveguide antenna 220 may further include a third buck cavity layer located below the first waveguide layer or the second waveguide layer, and a third radiating layer 223 located below the third buck cavity layer.

[0069] The third radiating layer 223, located on the opposite side from the first radiating layer 221, may be positioned close to a second side (e.g., the right side) that is different from the first side of the substrate's outer casing.

[0070] The waveguide antenna 220 may have a first field of view (FoV) in a first direction with respect to the first radiating layer 221 and a second field of view in a second direction with respect to the second radiating layer 222 or the third radiating layer 223. The first direction may be the upward direction of the first radiating layer 221, and the second direction may be the downward direction of the second radiating layer 222 or the third radiating layer 223. Therefore, the first and second directions may be opposite directions. The first and second directions may be opposite directions with respect to the substrate 210. The first direction of the first field of view in the first direction may be the propagation / radiation direction of the antenna pattern / antenna radiation pattern radiated in relation to the first radiating layer 221. The first field of view in the first direction may include an area / range / angle from which the antenna pattern / antenna radiation pattern or signal / wave etc. radiated in relation to the first radiating layer 221 can be received. The second direction of the second field of view in the second direction may be the direction of propagation / radiation of an antenna pattern / antenna radiation pattern radiated in relation to the second radiating layer 222 or the third radiating layer 223. The second field of view in the second direction may include an area / range / angle from which an antenna pattern / antenna radiation pattern or signal / wave etc. radiated in relation to the second radiating layer 222 or the third radiating layer 223 can be received.

[0071] With respect to a horizontal line at least parallel to a horizontal line extending from the substrate 210 or the first radiating layer 221, if the first viewing angle in the first direction is an angle between 0° and 180°, then the second viewing angle in the second direction on the opposite side may be an angle between 180° and 360°.

[0072] If the second field of view in the second direction follows at least a portion of the first field of view in the first direction, the second field of view in the second direction may begin at one angle from the angle at which the first field of view in the first direction begins to the angle at which it ends, and end at another angle from the angle at which the first field of view in the first direction begins again (if it connects to 360°).

[0073] Referring to Figure 3, the structure of an antenna device having a bidirectional field of view according to one embodiment can be seen.

[0074] According to one embodiment, the waveguide antenna 320 may be positioned to pass through at least a portion of the substrate 310. The waveguide antenna 320 may be positioned to penetrate a portion of the substrate 310, such as a PCB.

[0075] According to one embodiment, the second radiating layer 322, which is located on the opposite side from the first radiating layer 321, may be positioned close to one of the ends of the substrate 310 (for example, the left end).

[0076] According to one embodiment, the at least two layers may further include a third back cavity layer located below a first waveguide layer or a second waveguide layer, and a third radiating layer 323 located below the third back cavity layer.

[0077] The third radiating layer 323, located on the opposite side from the first radiating layer 321, may be positioned close to the other end of the substrate 310 (for example, the right end).

[0078] Referring to Figure 4, the structure of an antenna device according to one embodiment can be seen.

[0079] According to one embodiment, the waveguide antenna 420 may be arranged to surround at least a portion of the substrate 410.

[0080] According to one embodiment, the second radiating layer 422, which is located on the opposite side from the first radiating layer 421, may be positioned close to the first side (e.g., the left side) of the outer casing of the substrate 410.

[0081] According to one embodiment, at least two layers of the waveguide antenna 420 may further include a third buck cavity layer located below the first waveguide layer or the second waveguide layer, and a third radiating layer 423 located below the third buck cavity layer.

[0082] The third radiating layer 423, located on the opposite side from the first radiating layer 421, may be positioned close to a second side (e.g., the right side) that is different from the first side of the substrate's outer casing.

[0083] According to one embodiment, at least two layers of the waveguide antenna 420 may further include a fourth buck cavity layer located below the first waveguide layer or the second waveguide layer, and a fourth radiating layer 424 located below the fourth buck cavity layer.

[0084] The fourth radiating layer 424, located on the opposite side from the first radiating layer 421, may be positioned close to the first and second sides of the substrate's outer casing. The fourth radiating layer 424 may be positioned in or near the center of the substrate, or it may be positioned so as to pass through the center of the substrate. The fourth radiating layer 424 may be positioned in or near the center of the substrate.

[0085] Referring to Figure 5, the structure of an antenna device according to one embodiment can be seen.

[0086] According to one embodiment, the waveguide antenna 520 may be arranged so as to pass through at least a portion of the substrate 510.

[0087] According to one embodiment, the second radiating layer 522, which is located on the opposite side from the first radiating layer 521, may be positioned close to one of the ends of the substrate 510 (for example, the left end).

[0088] According to one embodiment, the at least two layers may further include a third back cavity layer positioned below a first waveguide layer or a second waveguide layer, and a third radiating layer 523 positioned below the third back cavity layer.

[0089] The third radiating layer 523, located on the opposite side from the first radiating layer 521, may be positioned close to the other end of the substrate 510 (for example, the right end).

[0090] According to one embodiment, at least two layers of the waveguide antenna 520 may further include a fourth buck cavity layer located below the first waveguide layer or the second waveguide layer, and a fourth radiating layer 524 located below the fourth buck cavity layer.

[0091] The fourth radiating layer 524, located on the opposite side from the first radiating layer 521, may be positioned close to at least a portion of the substrate between the second radiating layer 522 and the third radiating layer 523. The fourth radiating layer 524 may be positioned in or near the center of the substrate, or it may be positioned so as to pass through the center of the substrate. The fourth radiating layer 524 may be positioned in or near the center of the substrate.

[0092] Figure 6 is a top view of an antenna device according to one embodiment.

[0093] The antenna devices can be arranged in directions in which they rotate simultaneously in various directions, and the directions described herein may be modified depending on the various embodiments applied. For example, an up-and-down arrangement may be changed to a front-to-back or left-to-right arrangement.

[0094] The antenna device may include a substrate and a waveguide antenna positioned in close proximity to at least a portion of the substrate.

[0095] The waveguide antenna may include a first upper antenna section 611, a second upper antenna section 612, and a third upper antenna section 613. If the antenna device rotates to change its orientation from vertical to horizontal, the first upper antenna section 611, the second upper antenna section 612, and the third upper antenna section 613 may each become a first front antenna section, a second front antenna section, and a third front antenna section.

[0096] Each antenna section of a waveguide antenna may include at least a part of the antenna and may represent the part that performs the antenna's operation / function.

[0097] The waveguide antenna may further include a first side antenna section 621 and a second side antenna section 622.

[0098] The waveguide antenna can have a first field of view (FoV) centered on a first direction by using at least one of the first upper antenna section 611, the second upper antenna section 612, and the third upper antenna section 613.

[0099] The first direction of the first field of view in the first direction is upward relative to the upper surface of the antenna device or waveguide antenna. The first direction may also be perpendicular to the upper surface of the antenna device or waveguide antenna.

[0100] The waveguide antenna can have a second field of view centered on a second direction by using at least one of the first side antenna section 621 and the second side antenna section 622.

[0101] The second direction may be different from the first direction. The second direction of the second field of view of the second direction is a direction that is lateral (e.g., to the right) to the side of the antenna device or waveguide antenna. The second direction may also be perpendicular to the side of the antenna device or waveguide antenna.

[0102] A waveguide antenna may have at least two layers. The first or second field of view may be an angle between 0° and 180°. The second and first field of view may overlap at least partially. The first or second direction may be perpendicular to at least one longitudinal direction of the first waveguide layer.

[0103] Figure 7 is a bottom view of an antenna device according to one embodiment.

[0104] The waveguide antenna of the antenna device may include a first bottom antenna section 731 and a second bottom antenna section 732. When the antenna device rotates to change its orientation from vertical to front-to-back, the first bottom antenna section 731 and the second bottom antenna section 732 may become a first rear antenna section and a second rear antenna section, respectively.

[0105] The waveguide antenna can have a second field of view centered on a second direction by using at least one of the first bottom antenna section 731 and the second bottom antenna section 732.

[0106] The second direction may be different from the first direction. If the waveguide antenna has a second field of view centered on the second direction using at least one of the first bottom antenna section 731 and the second bottom antenna section 732, the second direction of the second field of view of the second direction is downward with respect to the bottom surface of the antenna device or waveguide antenna. The second direction may also be perpendicular to the bottom surface of the antenna device or waveguide antenna.

[0107] A waveguide antenna may have at least two layers. The first or second field of view may be an angle between 0° and 180°. The first and second directions may be opposite to each other. The first or second direction may be perpendicular to at least one longitudinal direction of the first waveguide layer.

[0108] The antenna device may further include antenna feed sections corresponding to each antenna section. The antenna feed section may include at least a portion of the PCB antenna feed.

[0109] The antenna device may include a first upper antenna feed section 741, a second upper antenna feed section 742, a third upper antenna feed section 743, a first side antenna feed section 751, a second side antenna feed section 752, a first bottom antenna feed section 761, and a second bottom antenna feed section 762.

[0110] Each of the first upper antenna feed section 741, the second upper antenna feed section 742, the third upper antenna feed section 743, the first side antenna feed section 751, the second side antenna feed section 752, the first bottom antenna feed section 761, and the second bottom antenna feed section 762 may be positioned on the bottom surface of the antenna device or waveguide antenna, or in close proximity to the bottom surface of the antenna device or waveguide antenna.

[0111] The first upper antenna feed section 741, the second upper antenna feed section 742, the third upper antenna feed section 743, the first side antenna feed section 751, the second side antenna feed section 752, the first bottom antenna feed section 761, and the second bottom antenna feed section 762 may be arranged in a specific arrangement. This specific arrangement may include a first arrangement and a second arrangement, the first and second arrangements of which may be arranged vertically.

[0112] The first arrangement may include a linear arrangement of the first upper antenna feed section 741, the second upper antenna feed section 742, the second lower antenna feed section 762, and the first side antenna feed section 751. The second arrangement may include a linear arrangement of the third upper antenna feed section 743, the first lower antenna feed section 761, and the second side antenna feed section 752.

[0113] When the antenna device rotates to change its orientation from vertical to horizontal, the first upper antenna feed section 741, the second upper antenna feed section 742, and the third upper antenna feed section 743 can each become the first front antenna feed section, the second front antenna feed section, and the third front antenna feed section, respectively, and the first bottom antenna feed section 761 and the second bottom antenna feed section 762 can each become the first rear antenna feed section and the second rear antenna feed section.

[0114] Figure 8 is a cross-sectional view of an antenna device according to one embodiment.

[0115] By examining the structure of one end face of the antenna device or waveguide antenna, the internal structure of the first side antenna section 821 and the second side antenna section 822 can be seen.

[0116] The first side antenna section 821 and the second side antenna section 822 may include multiple layers. The multiple layers may include at least a portion of at least two of the layers described above.

[0117] The above description has focused on embodiments, but these are merely illustrative examples and do not limit the present invention. Anyone with ordinary skill in the art to which the present invention belongs will understand that various modifications and applications not exemplified above are possible, as long as they do not deviate from the essential characteristics of these embodiments. For example, each component specifically shown in the embodiments can be modified and implemented. Such differences related to modifications and applications should be interpreted as being within the scope of the present invention as defined in the appended claims.

Claims

1. circuit board and The substrate includes a waveguide antenna positioned in close proximity to at least a portion of it, The waveguide antenna is The first field of view (FoV) is centered on the first direction, It has a second field of view centered in a second direction different from the first direction, It has at least two layers, The first field of view or the second field of view is an angle between 0° and 180°. An antenna device in which the second field of view and the first field of view overlap in at least part, or the first direction and the second direction are opposite to each other.

2. The aforementioned two layers are, The first waveguide layer, The antenna apparatus according to claim 1, further comprising a second waveguide layer disposed on the first waveguide layer.

3. The aforementioned two layers are, A first backed cavity layer is positioned on the first waveguide layer or the second waveguide layer, The antenna apparatus according to claim 2, further comprising a second back cavity layer disposed below the first waveguide layer or the second waveguide layer.

4. The first back cavity layer and the second back cavity layer are The antenna device according to claim 3, wherein the first waveguide layer or the second waveguide layer is arranged in opposite directions relative to each other.

5. The aforementioned two layers are, A first radiating layer is positioned on top of the first back cavity layer, The antenna device according to claim 3, further comprising a second radiating layer disposed below the second back cavity layer.

6. The first radiating layer and the second radiating layer are The antenna device according to claim 5, wherein the first waveguide layer or the second waveguide layer are arranged in opposite directions relative to each other.

7. The aforementioned second radiating layer is The antenna device according to claim 5, which is positioned in close proximity to the first side surface of the outer casing of the substrate.

8. The aforementioned two layers are, A third back cavity layer positioned below the first waveguide layer or the second waveguide layer, The present invention further includes a third radiating layer positioned below the third back cavity layer, The aforementioned third radiating layer is The antenna device according to claim 7, which is positioned in close proximity to a second side surface of the outer casing of the substrate that is different from the first side surface.

9. The aforementioned second radiating layer is The antenna device according to claim 5, which is positioned in close proximity to one of the ends of the substrate.

10. The aforementioned two layers are, A third back cavity layer positioned below the first waveguide layer or the second waveguide layer, The present invention further includes a third radiating layer positioned below the third back cavity layer, The aforementioned third radiating layer is The antenna device according to claim 9, which is positioned in close proximity to one of the other ends of the substrate.

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