Antenna apparatus

Abstract

Provided is an antenna apparatus (10), comprising: a first base plate (1), which comprises a first substrate (11), first signal traces (16) and radiation patches (17), wherein the first signal traces (16) are connected to the radiation patches (17); a second base plate (2), which comprises a second substrate (21), second signal traces (26) and slot electrodes (27), wherein the second signal traces (26) are connected to the slot electrodes (27), and orthographic projections of radiation slots (28) in the slot electrodes (27) on the first substrate (11) at least partially overlap the corresponding radiation patches (17); and a dielectric layer (3), which is located between the first base plate (1) and the second base plate (2). In the embodiments of the present disclosure, a planar waveguide structure can be formed on the basis of a plurality of radiation patches (17) and slot electrodes (27), thereby ensuring the high efficiency of the antenna apparatus (10) and also achieving low-profile characteristics.

Description

Antenna device Technical Field

[0001] This disclosure relates to the field of communication technology, and more specifically, to an antenna device. Background Technology

[0002] With the rapid development of modern radar and satellite communication, electromagnetic spectrum resources are becoming increasingly scarce. Electromagnetic interference is becoming more and more serious at the low end of the widely used microwave frequency band. Therefore, the operating frequency band of electronic information systems is constantly developing towards higher frequency bands such as Ku band (12GHz~18GHz) and Ka band (26.5GHz~40GHz).

[0003] Currently, the most widely used antennas in the Ku band include microstrip patch antennas and waveguide slot antennas. Microstrip patch antennas have certain advantages in terms of size and polarization implementation, and are easy to array, integrate, and conformally conform to. However, due to the relatively high losses (including dielectric loss, ohmic loss, and radiation loss) in the Ku band, it is difficult to achieve high antenna efficiency. Waveguide slot antennas have the characteristics of high efficiency and compact structure, but are limited by structural constraints, resulting in a high profile and large volume. Therefore, there is an urgent need for a high-efficiency and low-profile antenna device.

[0004] It should be noted that the information disclosed in the background section above is only used to enhance the understanding of the background of this disclosure, and therefore may include information that does not constitute prior art known to those skilled in the art. Summary of the Invention

[0005] The purpose of this disclosure is to provide an antenna device.

[0006] According to one aspect of this disclosure, an antenna device is provided, comprising:

[0007] The first substrate includes a first substrate, a plurality of first signal traces located on one side of the first substrate, and a plurality of radiating patches arranged in an array, wherein one first signal trace is connected to one of the radiating patches.

[0008] The second substrate includes a second substrate, a second signal trace and a slot electrode located on one side of the second substrate. The slot electrode has a plurality of radiating slots. The second signal trace is connected to the slot electrode. The plurality of radiating slots correspond one-to-one with a plurality of radiating patches, and the orthographic projection of each radiating slot on the first substrate at least partially overlaps with the corresponding radiating patch.

[0009] A dielectric layer is located between the first substrate and the second substrate.

[0010] According to any of the antenna devices described in this disclosure, the plurality of radiating patches are arranged in a circular array, and the angle between the length direction of each radiating slot and the radial direction of the center point of the radiating slot is greater than or equal to 30 degrees and less than or equal to 60 degrees.

[0011] According to any of the antenna devices described in this disclosure, each ring of multiple radiating patches includes a first radiating patch and a second radiating patch;

[0012] The length of the radiation gap corresponding to the first radiation patch pointing away from the center of the circle forms a first angle along the radial direction from the center point of the radiation gap clockwise, and the length of the radiation gap corresponding to the second radiation patch pointing away from the center of the circle forms a second angle along the radial direction from the center point of the radiation gap counterclockwise, and the first angle and the second angle are equal.

[0013] According to any of the antenna devices described in this disclosure, along the width direction of the radiating slot, both ends of the orthographic projection of the radiating patch on the second substrate are located outside the area enclosed by the radiating slot; along the length direction of the radiating slot, both ends of the radiating slot are located outside the area where the orthographic projection of the radiating patch on the second substrate is located.

[0014] According to any of the antenna devices described in this disclosure, the radiating patch is rectangular, and the end of the first signal trace is perpendicular to one side of the radiating patch and faces the center point of the radiating patch.

[0015] According to any of the antenna devices described in this disclosure, the end of the first signal trace is pointed perpendicular to the narrow side of the radiating patch.

[0016] According to any of the antenna devices described in this disclosure, the linewidth of the first signal trace is equal to the length of the narrow side of the radiating patch.

[0017] According to any of the antenna devices described in this disclosure, the orthographic projection of each of the first signal traces on the second substrate is located between the radiating slots on the slot electrodes.

[0018] According to any of the antenna devices described in this disclosure, the first substrate includes a first wiring layer and a first electrode layer sequentially stacked on one side of the first substrate;

[0019] The first trace layer includes a plurality of first signal traces, and the first electrode layer includes a plurality of radiating patches. The orthographic projection of each radiating patch on the first trace layer overlaps with the end of the corresponding first signal trace.

[0020] According to any of the antenna devices described in this disclosure, the second substrate includes a second wiring layer and a second electrode layer sequentially stacked on one side of the second substrate;

[0021] The second trace layer includes the second signal trace, and the second electrode layer constitutes the slot electrode, which covers the end of the second signal trace.

[0022] According to any of the antenna devices described in this disclosure, the second electrode layer includes a plurality of spaced-apart block electrodes, and the second trace layer includes a plurality of second signal traces;

[0023] Each of the multiple segmented electrodes corresponds one-to-one with a multiple of the second signal traces, and each segmented electrode is connected to the corresponding second signal trace.

[0024] According to any of the antenna devices described in this disclosure, the second signal trace includes a peripheral trace and an inner trace;

[0025] The outer trace is connected to the inner trace and is located outside the second electrode layer. The inner trace is located in the gap between two adjacent segmented electrodes and is connected to one of the segmented electrodes.

[0026] According to any of the antenna devices described in this disclosure, the antenna device includes a radiating region and a control region located outside the radiating region;

[0027] The first signal trace and the radiating patch are both located in the radiation area. The control area is provided with multiple driving modules. The multiple radiating patches include a group of radiating patches that are directly opposite each of the segmented electrodes. Each driving module is connected to the first signal trace connected to at least one group of the radiating patches.

[0028] According to any of the antenna devices described in this disclosure, the second substrate further includes a first insulating layer located on the side of the second electrode layer away from the second substrate, the first insulating layer covering the second electrode layer.

[0029] According to any of the antenna devices described in this disclosure, the second electrode layer has a plurality of perforated holes arranged in an array.

[0030] According to any of the antenna devices described in this disclosure, the perforation is circular, and the diameter of the perforation is greater than or equal to 40 micrometers and less than or equal to 100 micrometers.

[0031] According to any of the antenna devices described in this disclosure, the spacing between the perforated holes is greater than or equal to 400 micrometers and less than or equal to 700 micrometers.

[0032] According to any of the antenna devices described in this disclosure, the antenna device further includes a plurality of support pillars, each of which has its orthographic projection on the second substrate located within the area enclosed by one of the cutout holes.

[0033] According to any of the antenna devices described in this disclosure, the orthographic projections of the perforated hole and the support column on the second substrate are both circular, and the ratio of the diameter of the orthographic projection of the support column to the diameter of the perforated hole is greater than or equal to 0.3 and less than or equal to 0.8.

[0034] It should be understood that the above general description and the following detailed description are exemplary and explanatory only, and are not intended to limit this disclosure. Attached Figure Description

[0035] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this disclosure and, together with the description, serve to explain the principles of this disclosure. It is obvious that the drawings described below are merely some embodiments of this disclosure, and those skilled in the art can obtain other drawings based on these drawings without any inventive effort.

[0036] Figure 1 is a cross-sectional structural diagram of an antenna device provided in an embodiment of this disclosure.

[0037] Figure 2 is a top-view perspective structural diagram of an antenna device provided in an embodiment of this disclosure.

[0038] Figure 3 is a perspective structural diagram of region A shown in Figure 2.

[0039] Figure 4 is a perspective structural diagram of region B shown in Figure 2.

[0040] Figure 5 is a top-view visual effect diagram of an antenna device provided in an embodiment of this disclosure.

[0041] Figure 6 is a schematic diagram of a block design for the second electrode layer provided in an embodiment of this disclosure.

[0042] Figure 7 is a top-view perspective structural diagram of another antenna device provided in this embodiment.

[0043] Figure 8 is a perspective structural diagram of another antenna device provided by the present disclosure in region A of Figure 2.

[0044] Figure 9 is a schematic diagram of the distribution of a radial slit provided in an embodiment of this disclosure.

[0045] Figure 10 is a schematic diagram of another distribution of radiation slots provided in an embodiment of this disclosure.

[0046] Reference numerals: 10. Antenna assembly; AA. Radiating area; BB. Control area; B1. Drive module; 1. First substrate; 2. Second substrate; 3. Dielectric layer; 4. Support pillar; 5. Frame; 11. First substrate; 12. First wiring layer; 13. First electrode layer; 14. Second insulating layer; 15. First alignment layer; 16. First signal trace; 17. Radiating patch; 141. Inorganic insulating layer; 142. Organic insulating layer; 161. Corner; 171. First radiating patch; 172. Second radiating patch; 21. Second substrate; 22. Second wiring layer; 23. Second electrode layer; 24. First insulating layer; 25. Second alignment layer; 26. Second signal trace; 27. Slot electrode; 28. Radiating slot; 231. Segmented electrode; 232. Hole; 261. Outer trace; 262. Inner trace. Detailed Implementation

[0047] Exemplary embodiments will now be described more fully with reference to the accompanying drawings. However, these exemplary embodiments can be implemented in many forms and should not be construed as limited to the embodiments set forth herein; rather, they are provided so that this disclosure will be thorough and complete, and will fully convey the concept of the exemplary embodiments to those skilled in the art. The same reference numerals in the drawings denote the same or similar structures, and therefore detailed descriptions of them will be omitted. Furthermore, the drawings are merely illustrative of this disclosure and are not necessarily drawn to scale.

[0048] Although relative terms such as "up" and "down" are used in this specification to describe the relative relationship of one component of an icon to another, these terms are used only for convenience, such as according to the orientation of the examples shown in the accompanying drawings. It is understood that if the device of the icon is flipped upside down, the component described as "up" will become the component described as "down." When a structure is "up" of another structure, it may mean that the structure is integrally formed on the other structure, or that the structure is "directly" mounted on the other structure, or that the structure is "indirectly" mounted on the other structure through another structure.

[0049] The terms “a,” “one,” “the,” “the,” and “at least one” are used to indicate the presence of one or more elements / components / etc.; the terms “including” and “having” are used to indicate an open-ended inclusion and to mean that there may be other elements / components / etc. in addition to the listed elements / components / etc.; the terms “first,” “second,” and “third,” etc., are used only as markers and are not a limitation on the number of objects.

[0050] Figure 1 illustrates a schematic diagram of the structure of an antenna device 10 provided in an embodiment of the present disclosure. As shown in Figure 1, the antenna device 10 includes: a first substrate 1 and a second substrate 2 disposed opposite to each other, and a dielectric layer 3 located between the first substrate 1 and the second substrate 2; the first substrate 1 includes a first substrate 11, and a plurality of first signal lines 16 and a plurality of radiating patches 17 arranged in an array on one side of the first substrate 11, wherein one first signal line 16 is connected to one radiating patch 17; the second substrate 2 includes a second substrate 21, and a second signal line 26 and a slot electrode 27 located on one side of the second substrate 21, wherein the slot electrode 27 has a plurality of radiating slots 28, the second signal lines 26 are connected to the slot electrode 27, the plurality of radiating slots 28 correspond one-to-one with the plurality of radiating patches 17, and the orthographic projection of each radiating slot 28 on the first substrate 11 at least partially overlaps with the corresponding radiating patch 17.

[0051] In this embodiment, a planar waveguide structure is formed by the plurality of radiating patches 17 included in the first substrate 1 and the slot electrode 27 included in the second substrate 2, thereby achieving low profile characteristics while ensuring high efficiency of the antenna device 10. In addition, based on the first signal trace 16 connected to the radiating patch 17 and the second signal trace 26 connected to the slot electrode 27, a bias voltage can be applied to adjust the dielectric constant of the dielectric layer 3 by forming an electric field, thereby controlling the direction of the electromagnetic waves radiated by the antenna device 10 and ensuring the wide-angle scanning performance of the antenna device 10.

[0052] The first substrate 11 and the second substrate 21 can be commonly used PCB insulating materials such as polytetrafluoroethylene glass fiber laminate, phenolic paper laminate, and phenolic glass cloth laminate, or they can be rigid materials with low microwave loss such as quartz and glass. In addition, the first substrate 11 and the second substrate 21 can be a single-layer board structure or a multi-layer composite board structure.

[0053] In this process, the dielectric constant of dielectric layer 3 changes when subjected to an electric field, thereby changing its refractive index. Based on this change in refractive index, the transmission of electromagnetic waves in dielectric layer 3 is adjusted, achieving the reconfigurable direction of the electromagnetic waves. The material of dielectric layer 3 can be chosen by those skilled in the art according to actual conditions, and is not limited here. For example, dielectric layer 3 may include electro-dielectric-changing materials, such as liquid crystal or graphene. Furthermore, as shown in Figure 1, the first substrate 1 and the second substrate 2 respectively include a first alignment layer 15 and a second alignment layer 25 adjacent to dielectric layer 3 (e.g., made of liquid crystal). The arrangement of the first alignment layer 15 and the second alignment layer 25 enables the alignment of liquid crystal molecules between the first substrate 1 and the second substrate 2, facilitating subsequent adjustment of the electromagnetic wave radiation direction by combining the deflection of the liquid crystal molecules.

[0054] In addition, as shown in Figure 1, the antenna device 10 also includes a frame 5 located between the first substrate 1 and the second substrate 2, and a plurality of support pillars 4 supporting the first substrate 1 and the second substrate 2. The frame 5 realizes the fixed connection between the first substrate 1 and the second substrate 2, while preventing water and oxygen from entering the gap between the first substrate 1 and the second substrate 2. The plurality of support pillars 4 ensure the thickness of the cell between the first substrate 1 and the second substrate 2, thereby ensuring the filling thickness of the dielectric layer 3, so as to effectively realize the reconfigurable direction of electromagnetic waves.

[0055] In some embodiments, as shown in FIG1, the first substrate 1 includes a first wiring layer 12 and a first electrode layer 13 stacked sequentially on one side of the first substrate 11; the first wiring layer 12 includes a plurality of first signal lines 16, and the first electrode layer 13 includes a plurality of radiating patches 17, wherein the orthographic projection of each radiating patch 17 on the first wiring layer 12 overlaps with the end of the corresponding first signal line 16.

[0056] The first wiring layer 12 can be an ITO wiring layer, and the first electrode layer 13 can be a copper layer. Of course, the first wiring layer 12 and the first electrode layer 13 can also be conductive layers of other materials. In addition, the first electrode layer 13 can directly cover the first wiring layer 12. In this case, each radiating patch 17 directly covers the end of the corresponding first signal line 16, thus achieving direct contact between the radiating patch 17 and the first signal line 16, thereby ensuring the stability of the connection between the first signal line 16 and the corresponding radiating patch 17; at the same time, it avoids the need for an insulating layer between the first wiring layer 12 and the first electrode layer 13, simplifying the film structure of the first substrate 1, and thus making it easier to ensure the low profile characteristics of the antenna device 10.

[0057] Alternatively, an insulating layer can be provided between the first trace layer 12 and the first electrode layer 13, and a metal via can be provided on the insulating layer to connect the first signal trace 16 to the corresponding radiating patch 17 through the metal via. This can avoid the influence of the first signal trace 16 other than the first signal trace 16 connected to the radiating patch 17 on the radiating patch 17, thereby ensuring the adjustment effect of the dielectric constant of the dielectric layer 3 and the radiation effect of electromagnetic waves on the radiating patch 17.

[0058] Furthermore, as shown in FIG1, the first substrate 1 also includes a second insulating layer 14 located on the side of the first electrode layer 13 facing away from the first substrate 11, thereby covering the multiple radiating patches 17 and the multiple first signal traces 16 through the second insulating layer 14, thus preventing electrostatic breakdown between the radiating patches 17 and the slot electrode 27.

[0059] The second insulating layer 14 can be an inorganic insulating layer 141 (such as a passivation layer), an organic insulating layer 142 (such as a resin layer (i.e., a planarization layer), or, as shown in Figure 1, an inorganic insulating layer 141 and an organic insulating layer 142 sequentially stacked on the side of the first electrode layer 13 away from the first substrate 11.

[0060] For the first substrate 1 including multiple first signal lines 16 and multiple radiating patches 17, one first signal line 16 can be connected to one radiating patch 17, that is, the first signal line 16 and the radiating patch 17 have a one-to-one correspondence; or one first signal line 16 can be connected to multiple radiating patches 17, that is, the first signal line 16 and the radiating patch 17 have a one-to-many correspondence. In addition, as shown in FIG2, the antenna device 10 has a radiation area AA and a control area BB located outside the radiation area AA. The control area BB of the antenna device 10 is provided with a driving module B1. The first signal lines 16 (not shown in the figure) and the radiating patches 17 included in the first substrate 1 are both located in the radiation area AA, and the end of the first signal line 16 that is not connected to the radiating patch 17 extends to the control area BB and is connected to the driving module B1, so that a voltage signal is sent through the driving module B1, thereby applying voltage to the radiating patch 17 through the first signal line 16.

[0061] The radiating patch 17 can be circular, rectangular, or other shapes. When the radiating patch 17 is rectangular, as shown in Figure 3 or Figure 4, the corners of the radiating patch 17 are rounded to prevent the accumulation of static charge at the corners of the radiating patch 17, and even to prevent electrostatic breakdown between the radiating patch 17 and the slot electrode 27. At the same time, it reduces or even avoids the accumulation of static charge, thus affecting the radiation of electromagnetic waves on the radiating patch 17.

[0062] In this configuration, the orthographic projection of the radiating patch 17 on the second substrate 2 overlaps with the corresponding radiating slot 28. This overlap could mean that the orthographic projection of the radiating patch 17 on the second substrate 2 is completely located within the area enclosed by the radiating slot 28; or the orthographic projection of the radiating patch 17 on the second substrate 2 completely covers the area enclosed by the radiating slot 28; or, along the width direction of the radiating slot 28, at least one end of the orthographic projection of the radiating patch 17 on the second substrate 2 is located outside the area enclosed by the radiating slot 28, and / or along the length direction of the radiating slot 28, at least one end of the radiating slot 28 is located outside the area where the orthographic projection of the radiating patch 17 is located on the second substrate 2. For example, as shown in Figure 3 or Figure 4, along the width direction of the radiating slot 28, both ends of the orthographic projection of the radiating patch 17 on the second substrate 2 are located outside the area enclosed by the radiating slot 28, and along the length direction of the radiating slot 28, both ends of the radiating slot 28 are located outside the area where the orthographic projection of the radiating patch 17 is located on the second substrate 2. Thus, based on the shielding of the radiating patch 17 by the slot electrode 27, the top view of the antenna device 10 is shown in Figure 5, thereby improving the neatness and aesthetics of the antenna device 10.

[0063] In addition, the center point of the radiating patch 17 can be set to coincide with the center point of the radiating slot 28 to ensure that the electric field formed between the radiating patch 17 and the slot electrode 27 can uniformly adjust the dielectric constant of the dielectric layer 3 for the region, thus ensuring the direction control effect of the electromagnetic wave; at the same time, it can ensure the uniformity of electromagnetic wave coupling between the radiating patch 17 and the radiating slot 28, thereby ensuring the uniformity of electromagnetic wave distribution.

[0064] Optionally, the orthographic projection of each first signal trace 16 on the second substrate 2 is located between the radiating slots 28 on the slot electrode 27. This achieves the shielding of the first signal trace 16 by the slot electrode 27, improving the neatness and aesthetics of the antenna device 10.

[0065] In this configuration, at least a portion of the orthographic projection of the radiating patch 17 onto the second substrate 2 lies outside the area enclosed by the corresponding radiating slot 28. This allows the first signal trace 16 to be connected to the portion of the radiating patch 17 located outside the radiating slot 28, ensuring complete shielding of the first signal trace 16 by the slot electrode 27. For example, along the width direction of the radiating slot 28, both ends of the orthographic projection of the radiating patch 17 onto the second substrate 2 lie outside the area enclosed by the radiating slot 28, and the first signal trace 16 is connected to one end of the radiating patch 17 along the width direction of the radiating slot 28.

[0066] As shown in Figure 3 or Figure 4, the first signal trace 16 has a corner portion 161 to realize the winding configuration of the first signal trace 16.

[0067] Optionally, as shown in Figure 3 or Figure 4, the corner 161 is a chamfered structure (such as a right-angled structure or a rounded corner structure). By setting the chamfer, the impedance discontinuity on the first signal trace 16 can be avoided. At the same time, the accumulation of etchant in the corner 161 can be avoided, which could cause the corner 161 to break. It can also prevent the accumulation of static charge in the corner 161, which could cause the corner 161 to discharge or even generate electromagnetic radiation.

[0068] Optionally, the first signal trace 16 has a certain trace width to ensure the continuity of impedance on the first signal trace 16, while avoiding the occurrence of wire breaks at the corner 161 and preventing the accumulation of static charge at the corner 161, which could lead to discharge or even electromagnetic radiation.

[0069] Of course, for the first signal trace 16 with corner portion 161, in addition to the two methods mentioned above, there can be other methods, such as the corner portion 161 being provided with a compensation block, or a combination of multiple methods. For example, the first signal trace 16 has a certain line width, and the corner portion 161 of the first signal trace 16 is a chamfered structure. This disclosure does not limit this aspect.

[0070] In some implementations, the end of the first signal trace 16 is pointed toward the center point of the radiating patch 17, which ensures the uniformity of the signal loaded on the radiating patch 17 by the first signal trace 16, thereby ensuring the signal quality on the radiating patch 17.

[0071] The end pointing of the first signal trace 16 refers to the direction of extension of the end of the first signal trace 16 that is connected to the radiating patch 17.

[0072] Taking a circular radiating patch 17 as an example, the end of the first signal trace 16 can be parallel to the radial direction of the radiating patch 17 to ensure that the end of the first signal trace 16 points toward the center point of the radiating patch 17; taking a rectangular radiating patch 17 as an example, the end of the first signal trace 16 can be perpendicular to one side of the radiating patch 17 and point toward the midpoint of that side to ensure that the end of the first signal trace 16 points toward the center point of the radiating patch 17.

[0073] In the case where the radiating patch 17 is rectangular, the end of the first signal trace 16 can be perpendicular to the long side of the radiating patch 17 or perpendicular to the narrow side of the radiating patch 17. This embodiment does not limit this, as long as the signal quality loaded on the radiating patch 17 can be guaranteed.

[0074] In conjunction with the above, when the first signal trace 16 is set to have a certain line width, taking the example that the end of the first signal trace 16 is perpendicular to the narrow side of the radiating patch 17, the end of the first signal trace 16 is connected to the narrow side of the radiating patch 17. Thus, the line width of the first signal trace 16 can be set to be equal to the length of the narrow side of the radiating patch 17, so as to reduce the wiring pressure of the first signal trace 16 on the first substrate 11 while ensuring the impedance continuity on the first signal trace 16.

[0075] In some embodiments, as shown in FIG1, the second substrate 2 includes a second wiring layer 22 and a second electrode layer 23 stacked sequentially on one side of the second substrate 21; the second wiring layer 22 includes a second signal line 26, and the second electrode layer 23 forms a gap electrode 27, which covers the end of the second signal line 26.

[0076] In this way, by directly covering the end of the second signal trace 26 with the slot electrode 27, direct contact between the slot electrode 27 and the second signal trace 26 is achieved, thereby ensuring the stability of the connection between the second signal trace 26 and the slot electrode 27; at the same time, the setting of an insulating layer between the second trace layer 22 and the second electrode layer 23 is avoided, simplifying the film structure of the second substrate 2, thereby making it easier to ensure the low profile characteristics of the antenna device 10.

[0077] Alternatively, an insulating layer may be provided between the second wiring layer 22 and the second electrode layer 23, and a metal via may be provided on the insulating layer to connect the second signal wiring 26 and the slot electrode 27 through the metal via. This embodiment does not limit this.

[0078] The second trace layer 22 can be an ITO trace layer, and the second electrode layer 23 can be a copper layer. Alternatively, the second trace layer 22 and the second electrode layer 23 can be conductive layers of other materials. The second electrode layer 23 can be a ground electrode layer, meaning the slot electrode 27 of the second electrode layer 23 is grounded through the second signal trace 26; or the second electrode layer 23 can be a common electrode layer, meaning the slot electrode 27 of the second electrode layer 23 is connected to a common point voltage line through the second signal trace 26, as long as a bias voltage can be applied to the slot electrode 27 and the radiating patch 17 to form an electric field. When the second electrode layer 23 is a ground electrode layer, the second signal trace 26 can not only apply voltage to the slot electrode 27 but also release static charge on the slot electrode 27, preventing electrostatic breakdown between the slot electrode 27 and the radiating patch 17 due to static charge accumulation.

[0079] As shown in Figure 2, the second electrode layer 23 can be a monolithic structure, where the entire second electrode layer 23 constitutes the slot electrode 27. In this case, the second electrode layer 23 has multiple radiation slots 28 that correspond one-to-one with the multiple radiation patches 17, thereby simplifying the structure of the second electrode layer 23. Of course, as shown in Figure 6 or Figure 7, the second electrode layer 23 can also be a segmented design, where the second electrode layer 23 includes multiple segmented electrodes 231 that are spaced apart. In this case, each segmented electrode 231 constitutes a slot electrode 27, thereby realizing the small-size splicing design of the slot electrode 27 and reducing the manufacturing process of the slot electrode 27.

[0080] When the slot electrode 27 is a single layer, the second wiring layer 22 includes one or more second signal traces 26 connected to the slot electrode 27 to ensure voltage loading and static charge release on the slot electrode 27. When the second electrode layer 23 is a modular design, the second wiring layer 22 includes multiple second signal traces 26 corresponding one-to-one with the multiple slot electrodes 27. Each second signal trace 26 is connected to its corresponding slot electrode 27, thereby ensuring voltage loading and static charge release on each slot electrode 27.

[0081] It should be noted that for the integral second electrode layer 23, all corners of the second electrode layer 23 can be chamfered (e.g., right-angled or rounded corners); while for the segmented design of the second electrode layer 23, the corners of the slot electrodes 27, as shown in Figure 6 or Figure 7, can all be chamfered (e.g., right-angled or rounded corners). This avoids corner discharge caused by the accumulation of static charge in the second electrode layer 23 or slot electrodes 27, thus preventing electrostatic breakdown between the second electrode layer 23 or slot electrodes 27 and the radiating patch 17. Furthermore, when the second electrode layer 23 is segmented, it avoids the concentrated accumulation of static charge over a large area of ​​the second electrode layer 23, allowing for individual accumulation of static charge on each slot electrode 27, thereby reducing the amount of static charge accumulation on each slot electrode 27 and reducing the likelihood of electrostatic breakdown between the slot electrodes 27 and the radiating patch 17.

[0082] In some embodiments, for the segmented design of the second electrode layer 23, as shown in FIG6, the second signal trace 26 includes an outer trace 261 and an inner trace 262; the outer trace 261 is connected to the inner trace 262 and is located on the periphery of the second electrode layer 23, and the inner trace 262 is located in the gap between two adjacent segmented electrodes 231 and is connected to one segmented electrode 231.

[0083] Thus, by placing the inner ring trace 262 between two adjacent segmented electrodes 231, the protrusion of the inner ring trace 262 is avoided, improving the aesthetics of the antenna device 10; at the same time, the overall thickness of the second substrate 2 at the inner ring trace 262 is reduced, further ensuring the low profile characteristics of the antenna device 10.

[0084] In some embodiments, the antenna device 10 described above includes a drive module B1 located in the control area BB, as shown in FIG7. The control area BB is provided with a plurality of drive modules B1, and a plurality of radiating patches 17 include a set of radiating patches 17 facing each segment electrode 231. Each drive module B1 is connected to a first signal trace 16 connected to at least a set of radiating patches 17.

[0085] In this way, each driving module B1 can be connected to a corresponding set of radiating patches 17, and each set of radiating patches 17 can be controlled separately through multiple driving modules B1, thereby achieving zoned control of the antenna device 10 in combination with each slot electrode 27.

[0086] In this embodiment, one driving module B1 may correspond to one segmented electrode 231, in which case each driving module B1 corresponds to a set of radiating patches 17, that is, one driving module B1 is connected to the first signal trace 16 connected to the set of radiating patches 17; alternatively, one driving module B1 may correspond to multiple segmented electrodes 231, in which case each driving module B1 corresponds to multiple sets of radiating patches 17, that is, one driving module B1 is connected to the first signal trace 16 connected to multiple sets of radiating patches 17. Of course, the number of segmented electrodes 231 corresponding to each driving module B1 may be the same or different, and this embodiment does not limit this.

[0087] For example, as shown in FIG7, the second electrode layer 23 includes four segmented slot electrodes 27, the multiple radiating patches 17 of the first substrate 1 include four sets of radiating patches 17, and the antenna device 10 includes four corresponding driving modules B1. Each driving module B1 is connected to the first signal trace 16 of the corresponding set of radiating patches 17, thereby realizing the partitioned control of the four slot electrodes 27 on the antenna device 10 through the four driving modules B1.

[0088] In some embodiments, as shown in FIG6 or FIG8, the second electrode layer 23 has a plurality of perforated holes 232 arranged in an array. By designing the perforated holes 232, the material consumption of the second electrode layer 23 can be reduced, and the effective area of ​​the second electrode layer 23 can be reduced to reduce the heat dissipation efficiency of the second electrode layer 23, thereby ensuring that the dielectric layer 3 is at a higher ambient temperature and improving the response rate of the dielectric layer 3 in an electric field.

[0089] The perforated hole 232 can be a circular hole, a rectangular hole, a triangular hole, etc. Taking a circular hole 232 as an example, the diameter of the perforated hole 232 is greater than or equal to 40 micrometers and less than or equal to 100 micrometers. For example, the diameter of the perforated hole 232 is 40 micrometers, 50 micrometers, 60 micrometers, 70 micrometers, 80 micrometers, 90 micrometers, 100 micrometers, etc.

[0090] Optionally, the spacing between the perforated holes 232 is greater than or equal to 400 micrometers and less than or equal to 700 micrometers. This ensures that the second electrode layer 23 has a sufficient number of perforated holes 232 to reduce the heat dissipation efficiency of the second electrode layer 23, while ensuring sufficient gaps between adjacent perforated holes 232 to accommodate the radiation slots 28, thereby guaranteeing the antenna performance of the antenna device 10. For example, the spacing between the perforated holes 232 is 400 micrometers, 450 micrometers, 500 micrometers, 550 micrometers, 600 micrometers, 650 micrometers, and 700 micrometers.

[0091] Optionally, the orthographic projections of the plurality of first signal traces 16 onto the second electrode layer 23 are all located in the gaps between the plurality of cutout holes 232. In this way, the second electrode layer 23 can shield the plurality of first signal traces 16, thereby improving the aesthetics of the antenna device 10.

[0092] In some embodiments, as shown in Figures 1 and 8, the antenna device 10 includes a plurality of support pillars 4, each of which has its orthographic projection on the second substrate 2 located within an area enclosed by a cutout 232.

[0093] This can be achieved by having a support pillar 4 within each area enclosed by a perforation 232, or by having a support pillar 4 within each area enclosed by one or more perforations 232. This ensures the uniformity of support provided by the multiple support pillars 4 between the first substrate 1 and the second substrate 2, avoiding over-support in localized areas. Furthermore, to ensure effective support of the support pillars 4 for the first substrate 1 and the second substrate 2, and to guarantee the filling area of ​​the dielectric layer 3, taking a circular orthographic projection of the support pillar 4 on the second substrate 2 as an example, the diameter of the orthographic projection of the support pillar 4 on the second substrate 2 is greater than or equal to 30 micrometers and less than or equal to 80 micrometers.

[0094] The shape of the orthographic projection of the support column 4 on the second substrate 2 can match the shape of the cutout hole 232. For example, both the cutout hole 232 and the orthographic projection of the support column 4 on the second substrate 2 are circular. Furthermore, when both the orthographic projection of the cutout hole 232 and the support column 4 on the second substrate 2 are circular, the ratio of the diameter of the orthographic projection of the support column 4 to the diameter of the cutout hole 232 is greater than or equal to 0.3 and less than or equal to 0.8. This facilitates effective support of the support column 4 for the first substrate 1 and the second substrate 2, while also ensuring the fabrication of the support column 4 within the area enclosed by the cutout hole 232. For example, the ratio of the diameter of the orthographic projection of the support column 4 to the diameter of the cutout hole 232 is 0.3, 0.4, 0.5, 0.6, 0.7, 0.8, etc. Based on the diameter of the aforementioned perforated hole 232, for example, if the diameter of the perforated hole 232 is 40 micrometers, the diameter of the orthographic projection of the support column 4 is 30 micrometers, 31 micrometers, 32 micrometers, etc.; if the diameter of the perforated hole 232 is 50 micrometers, the diameter of the orthographic projection of the support column 4 is 30 micrometers, 35 micrometers, 40 micrometers, etc.; if the diameter of the perforated hole 232 is 80 micrometers, the diameter of the orthographic projection of the support column 4 is 30 micrometers, 40 micrometers, 50 micrometers, 60 micrometers, etc.; if the diameter of the perforated hole 232 is 100 micrometers, the diameter of the orthographic projection of the support column 4 is 30 micrometers, 40 micrometers, 50 micrometers, 60 micrometers, 70 micrometers, 80 micrometers, etc.

[0095] In some embodiments, as shown in FIG1, the second substrate 2 further includes a first insulating layer 24 located on the side of the second electrode layer 23 away from the second substrate 21, and the first insulating layer 24 covers the second electrode layer 23. In this way, by covering the second electrode layer 23 with the first insulating layer 24, insulation between the second electrode layer 23 and the first electrode layer 13 can be achieved, thereby further preventing electrostatic breakdown between the radiating patch 17 and the slot electrode 27.

[0096] The first insulating layer 24 can be disposed corresponding to the second electrode layer 23 of the whole-layer structure, that is, the first insulating layer 24 covers the second electrode layer 23 of the whole-layer structure; or it can be disposed corresponding to the second electrode layer 23 of the segmented design, that is, the first insulating layer 24 covers the multiple slot electrodes 27 included in the second electrode layer 23. In addition, the first insulating layer 24 can be an inorganic insulating layer 141 (such as a passivation layer, etc.), or it can be an organic insulating layer 142 (such as a resin layer (i.e., a planarization layer), etc.), or it can be an inorganic insulating layer 141 and an organic insulating layer 142 sequentially stacked on the side of the second electrode layer 23 away from the second substrate 21.

[0097] In this embodiment of the disclosure, the plurality of radiating patches 17 included in the first substrate 1 may be arranged in a matrix or in a circular array as shown in FIG2 or FIG7. In this way, linear polarization, circular polarization or dual polarization of electromagnetic waves radiated by the antenna device 10 can be realized based on the matrix or circular array distribution of the radiating patches 17.

[0098] The following explanation will take the example of multiple radiating patches 17 arranged in a circular array to achieve circular polarization of the antenna device 10.

[0099] As shown in Figure 9, the angle between the longitudinal direction O of each radial slit 28 and the radial direction R where the center point of the radial slit 28 is located is... Greater than or equal to 30 degrees and less than or equal to 60 degrees.

[0100] For example, the angle formed by the length direction O of each radiation slit 28 and the radial direction R where the center point of the corresponding radiation patch 17 is located is 30 degrees, 35 degrees, 40 degrees, 45 degrees, 50 degrees, 55 degrees, 60 degrees, etc.

[0101] The circumferential spacing between the center points of two adjacent radiating patches 17 on each ring can be unequal to achieve an asymmetrical distribution of multiple radiating patches 17 on each ring. Of course, the circumferential spacing between the center points of two adjacent radiating patches 17 on each ring can also be equal to achieve a uniform distribution (i.e., rotationally symmetric distribution) of multiple radiating patches 17 on each ring, thereby improving the uniformity of the electromagnetic waves radiated by the radiating patches 17 on each ring in the circumferential direction. At the same time, combined with the block design of the second electrode layer 23, the manufacturing process of the radiating gaps 28 on the multiple gap electrodes 27 is simplified. In addition, the radial spacing between the center points of two adjacent rings of radiating patches 17 can be unequal to achieve an asymmetrical distribution of the multi-ring radiating patches 17; of course, the radial spacing between the center points of two adjacent rings of radiating patches 17 can also be equal to achieve a uniform radial distribution of the multi-ring radiating patches 17, thereby improving the uniformity of the radial distribution of electromagnetic waves radiated by the multiple radiating patches 17. At the same time, combined with the block design of the second electrode layer 23, the manufacturing process of the radiating slots 28 on the multiple slot electrodes 27 is simplified.

[0102] In this antenna device 10, the first substrate 1 includes multiple radiating patches 17 of the same size, and the corresponding radiating slots 28 of the multiple radiating patches 17 are also of the same size. Thus, the overall parameters of the radiating elements formed by the radiating patches 17 and radiating slots 28 are identical, meaning each radiating element operates at the same frequency. This allows the antenna device 10 to be used solely for transmitting or receiving electromagnetic waves. Alternatively, the first substrate 1 may include at least two types of radiating patches 17 of different sizes, and / or at least two types of radiating slots 28 of different sizes. This results in at least two types of radiating elements with different overall parameters, meaning the antenna device 10 includes at least two types of radiating elements with different operating frequencies. In this case, electromagnetic wave transmission can be achieved based on one type of radiating element, and electromagnetic wave reception can be achieved based on the other type, thus realizing the integrated transmission and reception performance of the antenna device 10.

[0103] In some embodiments, each ring of multiple radiating patches 17 includes a first radiating patch 171 and a second radiating patch 172; as shown in FIG10, the radial direction O of the radiating slot 28 corresponding to the first radiating patch 171, pointing away from the center, forms a first angle with the radial direction R from the center point of the radiating slot 28 clockwise to the center point of the radiating slot 28. The length of the radiation slot 28 corresponding to the second radiation patch 172, pointing away from the center, points O and forms a second angle with the radial direction R from the center point of the radiation slot 28 counterclockwise. First included angle With the second angle equal.

[0104] Thus, by setting the length direction O of the radiation slot 28 corresponding to the first radiation unit and the length direction O of the radiation slot 28 corresponding to the second radiation unit, the left-hand circular polarization effect and the right-hand circular polarization effect of the multiple radiation patches 17 in each ring can be achieved, thereby facilitating the improvement of the antenna performance of the antenna device 10.

[0105] Among them, the first included angle With the second angle The included angle described above can be used as a reference. The first radiating patch 171 and the corresponding radiating slot 28 constitute a first radiating element, and the second radiating patch 172 and the corresponding radiating slot 28 constitute a second radiating element. The overall structural parameters of the first and second radiating elements can be the same or different, that is, the operating frequencies of the first and second radiating elements can be the same or different. When the operating frequencies of the first and second radiating elements are the same, the antenna device 10 can switch between left-hand circular polarization and right-hand circular polarization when transmitting or receiving electromagnetic waves. When the operating frequencies of the first and second radiating elements are different, the antenna device 10 can transmit electromagnetic waves based on left-hand circular polarization and receive electromagnetic waves based on right-hand circular polarization, or transmit electromagnetic waves based on right-hand circular polarization and receive electromagnetic waves based on left-hand circular polarization. This disclosure does not limit this aspect.

[0106] In conjunction with the above, when the overall structural parameters of the first radiating unit and the second radiating unit are the same, the structural dimensions of the first radiating patch 171 and the second radiating patch 172 may be the same, and the structural dimensions of the radiating gap 28 corresponding to the first radiating patch 171 and the radiating gap 28 corresponding to the second radiating patch 172 may be the same. When the overall structural parameters of the first radiating unit and the second radiating unit are different, the structural dimensions of the first radiating patch 171 and the second radiating patch 172 may be different, and / or the structural dimensions of the radiating gap 28 corresponding to the first radiating patch 171 and the radiating gap 28 corresponding to the second radiating patch 172 may be different.

[0107] Other embodiments of this disclosure will readily occur to those skilled in the art upon consideration of the specification and practice of the invention disclosed herein. This application is intended to cover any variations, uses, or adaptations of this disclosure that follow the general principles of this disclosure and include common knowledge or customary techniques in the art not disclosed herein. The specification and examples are to be considered exemplary only, and the true scope and spirit of this disclosure are indicated by the appended claims.

Claims

1. An antenna device, wherein, include: The first substrate includes a first substrate, a plurality of first signal traces located on one side of the first substrate, and a plurality of radiating patches arranged in an array, wherein one first signal trace is connected to one of the radiating patches. The second substrate includes a second substrate, a second signal trace and a slot electrode located on one side of the second substrate. The slot electrode has a plurality of radiating slots. The second signal trace is connected to the slot electrode. The plurality of radiating slots correspond one-to-one with a plurality of radiating patches, and the orthographic projection of each radiating slot on the first substrate at least partially overlaps with the corresponding radiating patch. A dielectric layer is located between the first substrate and the second substrate.

2. The antenna device as claimed in claim 1, wherein, The plurality of said radiating patches are arranged in a circular array, and the angle between the length direction of each said radiating slit and the radial direction of the center point of the radiating slit is greater than or equal to 30 degrees and less than or equal to 60 degrees.

3. The antenna device as claimed in claim 2, wherein, Each ring includes a first radiating patch and a second radiating patch among its plurality of radiating patches; The length of the radiation gap corresponding to the first radiation patch pointing away from the center of the circle forms a first angle along the radial direction from the center point of the radiation gap clockwise, and the length of the radiation gap corresponding to the second radiation patch pointing away from the center of the circle forms a second angle along the radial direction from the center point of the radiation gap counterclockwise, and the first angle and the second angle are equal.

4. The antenna device as claimed in claim 1, wherein, Along the width direction of the radiating gap, both ends of the orthographic projection of the radiating patch on the second substrate are located outside the area enclosed by the radiating gap; Along the length of the radiating slit, both ends of the radiating slit are located outside the area where the orthographic projection of the radiating patch is on the second substrate.

5. The antenna device as claimed in claim 1, wherein, The radiating patch is rectangular, and the end of the first signal trace is perpendicular to one side of the radiating patch and faces the center point of the radiating patch.

6. The antenna device as claimed in claim 5, wherein, The end of the first signal trace is perpendicular to the narrow side of the radiating patch.

7. The antenna device as claimed in claim 6, wherein, The line width of the first signal trace is equal to the length of the narrow side of the radiating patch.

8. The antenna device as claimed in claim 1, wherein, The orthographic projection of each of the first signal traces on the second substrate lies between the radiating slots on the slot electrodes.

9. The antenna device according to any one of claims 1-8, wherein, The first substrate includes a first wiring layer and a first electrode layer sequentially stacked on one side of the first substrate; The first trace layer includes a plurality of first signal traces, and the first electrode layer includes a plurality of radiating patches. The orthographic projection of each radiating patch on the first trace layer overlaps with the end of the corresponding first signal trace.

10. The antenna device according to any one of claims 1-8, wherein, The second substrate includes a second wiring layer and a second electrode layer sequentially stacked on one side of the second substrate; The second trace layer includes the second signal trace, and the second electrode layer constitutes the slot electrode, which covers the end of the second signal trace.

11. The antenna device as claimed in claim 10, wherein, The second electrode layer includes a plurality of spaced-apart block electrodes, and the second trace layer includes a plurality of second signal traces; Each of the multiple segmented electrodes corresponds one-to-one with a multiple of the second signal traces, and each segmented electrode is connected to the corresponding second signal trace.

12. The antenna device as claimed in claim 11, wherein, The second signal trace includes outer traces and inner traces; The outer trace is connected to the inner trace and is located outside the second electrode layer. The inner trace is located in the gap between two adjacent segmented electrodes and is connected to one of the segmented electrodes.

13. The antenna device as claimed in claim 11, wherein, The antenna device includes a radiating area and a control area located outside the radiating area; The first signal trace and the radiating patch are both located in the radiation area. The control area is provided with multiple driving modules. The multiple radiating patches include a group of radiating patches that are directly opposite each of the segmented electrodes. Each driving module is connected to the first signal trace connected to at least one group of the radiating patches.

14. The antenna device as claimed in claim 10, wherein, The second substrate further includes a first insulating layer located on the side of the second electrode layer away from the second substrate, the first insulating layer covering the second electrode layer.

15. The antenna device as claimed in claim 10, wherein, The second electrode layer has multiple perforated holes arranged in an array.

16. The antenna device as claimed in claim 15, wherein, The perforated hole is circular, and the diameter of the perforated hole is greater than or equal to 40 micrometers and less than or equal to 100 micrometers.

17. The antenna device as claimed in claim 15, wherein, The spacing between the perforated holes is greater than or equal to 400 micrometers and less than or equal to 700 micrometers.

18. The antenna device as claimed in claim 15, wherein, The antenna device further includes a plurality of support columns, each of which has its orthographic projection on the second substrate located within the area enclosed by one of the cutout holes.

19. The antenna device as claimed in claim 18, wherein, The orthographic projections of the perforated hole and the support column on the second substrate are both circular, and the ratio of the diameter of the orthographic projection of the support column to the diameter of the perforated hole is greater than or equal to 0.3 and less than or equal to 0.8.

Images