Antenna unit and antenna equipment

Abstract

The invention provides an antenna unit and antenna equipment, belongs to the technical field of antennas, and aims to enable a transparent antenna to have a filtering effect. The radiation layer is located on one side of the feed structure and comprises a first substrate layer and a radiation patch located on the side, away from the feed structure, of the first substrate layer; wherein the first substrate layer is a transparent substrate layer; the filtering structure and the radiation patch are arranged in the thickness direction of the radiation layer, and a gap is formed between the filtering structure and the radiation patch in the thickness direction of the radiation layer; wherein the filtering structure comprises at least one annular electrode pattern, and the orthographic projection of the annular electrode pattern on the first substrate layer is at least partially overlapped with the orthographic projection of the radiation patch on the first substrate layer.

Description

TECHNICAL FIELD

[0001] The present disclosure relates to the technical field of antennas, and in particular, to an antenna unit and an antenna device. BACKGROUND

[0002] At present, antennas are applied to high-rise buildings, commercial areas, residential areas, parks and other places for signal coverage, but the aesthetic appearance and the coping ability in complex electromagnetic environment still need to be improved. SUMMARY

[0003] Based on the content of the background art, the present disclosure provides an antenna unit and an antenna device.

[0004] In a first aspect, the present disclosure provides an antenna unit, comprising:

[0005] a feeding structure;

[0006] a radiation layer located on one side of the feeding structure, comprising a first substrate layer and a radiation patch located on a side of the first substrate layer away from the feeding structure; wherein the first substrate layer is a transparent substrate layer;

[0007] a filter structure arranged in a thickness direction of the radiation layer with the radiation patch, and having a spacing between the filter structure and the radiation patch in the thickness direction of the radiation layer;

[0008] wherein the filter structure comprises at least one ring-shaped electrode pattern, and a normal projection of the ring-shaped electrode pattern on the first substrate layer at least partially overlaps a normal projection of the radiation patch on the first substrate layer.

[0009] Optionally, the filter structure comprises a plurality of ring-shaped electrode patterns, and the plurality of ring-shaped electrode patterns are located on the same side of the radiation layer.

[0010] wherein the spacing between the plurality of ring-shaped electrode patterns and the radiation layer in the thickness direction of the radiation layer is not completely the same.

[0011] Optionally, the filter structure further comprises a second substrate layer.

[0012] wherein part of the ring-shaped electrode patterns are located on a side of the second substrate layer away from the radiation layer, and part of the ring-shaped electrode patterns are located on a side of the second substrate layer close to the radiation layer.

[0013] Optionally, the antenna unit further comprises a reflecting plate, and the reflecting plate is located at an end of the feeding structure away from the radiation layer.

[0014] The filter structure is located on a side of the radiation layer close to the reflecting plate, and a distance between the filter structure and the radiation layer is less than or equal to a distance between the filter structure and the reflecting plate.

[0015] Optionally, part of the plurality of ring-shaped electrode patterns is located on a side of the first substrate layer away from the radiation patch.

[0016] The filter structure includes a third substrate layer, and part of the plurality of ring-shaped electrode patterns is located on the third substrate layer.

[0017] Optionally, the filter structure includes a plurality of ring-shaped electrode patterns, and a projection of two adjacent ring-shaped electrode patterns in the first substrate layer is inside a projection of the other ring-shaped electrode pattern in the first substrate layer.

[0018] Optionally, a geometric center of a projection of at least part of the ring-shaped electrode patterns on the radiation layer is coincident.

[0019] Optionally, an outer contour of a projection of the filter structure on the radiation layer is inside the radiation layer.

[0020] Optionally, a distance between projections of two adjacent ring-shaped electrode patterns on the radiation layer is greater than or equal to 0.25λ, where λ is a wavelength of the antenna unit in a working frequency band.

[0021] Optionally, the radiation patch includes a first structural unit and a second structural unit, and the first structural unit is orthogonal to the second structural unit.

[0022] The first structural unit includes a first slit, and the second structural unit includes a second slit, and a projection of the first slit and the second slit on the first substrate layer is an axisymmetric pattern with a diagonal line of the first substrate layer as a symmetric axis.

[0023] The projection of the first slit and the second slit on the first substrate layer does not overlap with a projection of the ring-shaped electrode pattern on the first substrate layer.

[0024] A second aspect of the present disclosure provides an antenna device including the antenna unit as described in the first aspect.

[0025] The antenna unit provided by the present disclosure comprises a feeding structure, a radiation layer located on one side of the feeding structure, a first substrate layer, and a radiation patch located on the side of the first substrate layer away from the feeding structure; wherein the first substrate layer is a transparent substrate layer; a filtering structure arranged in the thickness direction of the radiation layer and having a spacing between the filtering structure and the radiation patch in the thickness direction of the radiation layer; wherein the filtering structure comprises at least one ring-shaped electrode pattern, and the orthographic projection of the ring-shaped electrode pattern on the first substrate layer at least partially overlaps the orthographic projection of the radiation patch on the first substrate layer.

[0026] Therefore, the present disclosure enables the antenna unit to realize the function of a partial filter by adding the filtering structure comprising at least one ring-shaped electrode pattern on the antenna unit, and the first substrate layer of the radiation layer and the feeding structure are both transparent structures, so that the antenna unit has a transparent visual effect and improves the aesthetic appearance.

[0027] The above description is only a summary of the technical solutions of the present disclosure, in order to enable the technical means of the present disclosure to be more clearly understood, and to be implemented according to the content of the specification, and in order to enable the above and other purposes, features and advantages of the present disclosure to be more obvious and easy to understand, the specific embodiments of the present disclosure are described below. BRIEF DESCRIPTION OF DRAWINGS

[0028] In order to more clearly illustrate the technical solutions in the embodiments of the present disclosure or the related art, the drawings needed to be used in the embodiments or related art description will be briefly introduced. Obviously, the drawings in the following description are some embodiments of the present disclosure, and those skilled in the art can also obtain other drawings according to these drawings without creative labor. It should be noted that the proportions in the drawings are only for illustration and do not represent the actual proportions.

[0029] Figure 1 A structural schematic diagram of an antenna unit provided by an embodiment of the present disclosure is shown;

[0030] Figure 2 A structural schematic diagram of an antenna unit provided by an embodiment of the present disclosure is shown; Figure 1 A top view of the radiation layer in the shown antenna unit is shown;

[0031] Figure 3 A structural schematic diagram of an antenna unit provided by an embodiment of the present disclosure is shown; Figure 1 A top view of the filtering structure in the shown antenna unit is shown;

[0032] Figure 4 A structural schematic diagram of an antenna unit provided by another embodiment of the present disclosure is shown;

[0033] Figure 5 A structural schematic diagram of an antenna unit provided by another embodiment of the present disclosure is shown;

[0034] Figure 6 A top view of the antenna unit is shown. Figure 4 A top view of the filter structure of the antenna unit is shown.

[0035] Figure 7 A structure diagram of the radiation patch in the radiation layer is shown. Figure 2 A structure diagram of the radiation patch in the radiation layer is shown.

[0036] Figure 8 A gain curve of the antenna unit provided in Example One is shown.

[0037] Figure 9 A horizontal radiation pattern of the antenna unit provided in Example One is shown.

[0038] Figure 10 A vertical radiation pattern of the antenna unit provided in Example One is shown.

[0039] Figure 11 A gain curve of the antenna unit provided in Example One is shown.

[0040] Figure 12 A top view of the radiation layer of the antenna unit provided in Example Four is shown. DETAILED DESCRIPTION

[0041] In order to make the above objectives, features and advantages of the present disclosure more obvious and easy to understand, the technical solutions in the embodiments of the present disclosure will be clearly and completely described below with reference to the drawings in the embodiments of the present disclosure. Obviously, the described embodiments are part of the embodiments of the present disclosure, rather than all the embodiments. Based on the embodiments in the present disclosure, all other embodiments obtained by those of ordinary skill in the art without creative labor fall within the scope of protection of the present disclosure.

[0042] With the increasing emphasis on the quality of life and the beauty of the environment, traditional antennas are often criticized for their large and conspicuous appearance. Beautifying antennas aims to solve this problem, which skillfully combines the functionality and aesthetics of antennas together. Beautified transparent antennas emerge as the times require. Whether it is a high-rise building in the city, a business district, or a residential area, a park, etc., a harmonious visual effect can be achieved, reducing the damage to the landscape, improving the overall beauty of the environment, and reducing people's fear of electromagnetic radiation. Today, with the rapid popularization of 4 / 5G network and other high-speed communication technologies, in order to improve the system's response capability in a complex electromagnetic environment, it is very important for the system to have strong filtering function. As the front end of the system, if the antenna can integrate the filtering function, it will definitely greatly reduce the requirements of the later system on the filter, achieving the function of reducing cost and increasing efficiency.

[0043] Therefore, the present disclosure provides an antenna unit and an antenna device, a filtering structure is added to the antenna unit, the filtering structure includes at least one ring-shaped electrode pattern, and ring-shaped electrode patterns of different sizes can generate different radiation zeros, so that the antenna unit has a filtering effect, and the radiation layer of the antenna unit is a transparent substrate layer, which makes the antenna unit have a transparent effect and can improve its aesthetic appearance.

[0044] Referring to Figure 1 , Figure 2 and Figure 3 , Figure 1 a structural schematic diagram of an antenna unit provided by an embodiment of the present disclosure is shown, Figure 2 a top view of the radiation layer shown in Figure 1 is shown, Figure 3 a top view of the feed structure of the antenna unit shown in Figure 1 is shown, the antenna unit specifically includes: Figures 1-3 a feed structure 3;

[0045] a radiation layer 1 located on one side of the feed structure 3, including a first substrate layer 11 and a radiation patch 12 located on the side of the first substrate layer 11 away from the feed structure 3; wherein the first substrate layer 11 is a transparent substrate layer;

[0046] a filtering structure 2 arranged in the thickness direction of the radiation layer 1 with the radiation patch 12, and having a spacing between the filtering structure 2 and the radiation patch 12 in the thickness direction of the radiation layer 1;

[0047] wherein the filtering structure 2 includes at least one ring-shaped electrode pattern 21, and the orthographic projection of the ring-shaped electrode pattern 21 on the first substrate layer 11 at least partially overlaps the orthographic projection of the radiation patch 12 on the first substrate layer 11.

[0048] In this embodiment, the feed structure 3, the radiation layer 1 and the filtering structure 2 can all include a plurality of transparent materials to make the antenna unit have a transparent effect, for example, the feed structure can include transparent PC (Polycarbonate, polycarbonate) material, optical conductive glue, PET (polyethylene terephthalate, polyethylene terephthalate) material and a grid-shaped metal layer formed on the surface of the PET material, and similarly, the first substrate layer 11 in the radiation layer 1 can include multiple layers of transparent materials, and the radiation patch 12 can be a grid-shaped metal layer, etc.

[0049]

[0050] ​The radiation patch 12 can be an orthogonal dipole, and the dipole shape can be a rectangle with a cut corner, a parallelogram, a sector, an ellipse, or the like. The surface of the radiation patch 12 can be provided with a plurality of slots, so that the radiation patch 12 can also achieve a partial filtering effect. The feeding structure 3 is a transparent feeding balun, and the balun line adopts a microstrip gradual change structure to achieve impedance matching. The feeding balun converts the input single-ended signal into a differential signal to input the radiation patch 12 to achieve signal radiation.

[0051] The filtering structure 2 can include one ring-shaped electrode pattern 21, or can include a plurality of ring-shaped electrode patterns 21. The number of ring-shaped electrode patterns 21 can be determined according to filtering requirements. For example, if two layers of filtering are required, the filtering structure 2 can include two ring-shaped electrode patterns 21; if three layers of filtering are required, the filtering structure 2 can include three ring-shaped electrode patterns 21; and so on. The filtering structure 2 can be located on the side of the radiation layer 1 away from the feeding structure 3, or can be located on the side of the radiation layer 1 close to the feeding structure 3. Specifically, when the filtering structure 2 is located on the side of the radiation layer 1 away from the feeding structure 3, the filtering structure 2 can further include a second substrate layer. In this case, the ring-shaped electrode pattern 21 is formed on the second substrate layer. The ring-shaped electrode pattern 21 can be formed on the side of the second substrate layer close to the radiation layer 1, or can be formed on the side of the second substrate layer away from the radiation layer 1. Alternatively, the ring-shaped electrode pattern 21 can be formed on both sides of the second substrate layer. When the filtering structure 2 is located on the side of the radiation layer 1 close to the feeding structure 3, the ring-shaped electrode pattern 21 can be formed on the surface of the first substrate layer 11 away from the radiation patch 12. Alternatively, the filtering structure 2 can further include a third substrate layer. The third substrate layer is located on the side of the radiation layer 1 away from the radiation patch 12. The ring-shaped electrode pattern 21 can be formed on both sides of the third substrate layer.

[0052] In this embodiment, the filtering structure 2 and the radiation patch 12 have a spacing therebetween. The spacing can be adjusted according to the structure of the antenna unit to be simulated. Figure 1 For example, the spacing between the filtering structure 2 and the radiation patch 12 is the distance therebetween in the direction indicated by the y-axis. The distance is less than 0.5λ, where λ is the wavelength of the antenna unit at the working frequency band. It can be understood that the spacing can be adjusted according to the structure of the antenna unit to be simulated.

[0053] In the case where the filtering structure 2 comprises a plurality of ring-shaped electrode patterns 21, the heights of the plurality of ring-shaped electrode patterns 21 relative to the radiation layer 1 can be the same or different. For example, the plurality of ring-shaped electrode patterns 21 can be formed on opposite sides of the second substrate layer. The plurality of ring-shaped electrode patterns 21 can also be partially located on the side of the first substrate layer 11 away from the radiation patch 12 and partially located on the surface of the third substrate layer. Of course, the plurality of ring-shaped electrode patterns 21 can also be located on the side of the second substrate layer away from the radiation layer 1, or on the side of the first substrate layer 11 away from the radiation patch 12. The heights of the plurality of ring-shaped electrode patterns 21 relative to the radiation layer 1 can be the same or different, and all of them can achieve the filtering effect.

[0054] The orthographic projection of the ring-shaped electrode pattern 21 on the first substrate layer 11 overlaps with the orthographic projection of the radiation patch 12 on the first substrate layer 11 to achieve the filtering effect. In the case where the ring-shaped electrode pattern 21 comprises a plurality of ring-shaped electrode patterns 21, the plurality of ring-shaped electrode patterns 21 can be concentric rings, and the distance between any two adjacent ring-shaped electrode patterns 21 is greater than 0.25λ, where λ represents the operating wavelength of the antenna element. The plurality of ring-shaped electrode patterns 21 all have filtering effects, and the circumference of the plurality of ring-shaped electrode patterns 21 determines the filtering frequency point. The shape of the ring-shaped electrode pattern 21 is not limited, and the plurality of ring-shaped electrode patterns 21 can all be rectangular or circular, or some of them can be rectangular and some of them can be circular.

[0055] The antenna element provided by the embodiments of the present disclosure has the filtering structure 2 added therein. The filtering structure 2 comprises at least one ring-shaped electrode pattern 21. The orthographic projection of the ring-shaped electrode pattern 21 on the first substrate layer 11 overlaps with the orthographic projection of the radiation patch 12 on the first substrate layer 11 to achieve the filtering effect. In addition, the first substrate layer 11 of the radiation layer is a transparent substrate layer, so that the antenna element as a whole has a transparent effect and improves the aesthetic appearance of the antenna element.

[0056] In an embodiment, referring to Figure 4 or Figure 5 , Figure 4 FIG. 1 shows a structural schematic diagram of an antenna element provided by another embodiment of the present disclosure, Figure 5 FIG. 2 shows a structural schematic diagram of an antenna element provided by yet another embodiment of the present disclosure, as Figure 4 or Figure 5 The filtering structure 4 comprises a plurality of ring-shaped electrode patterns 21, and the plurality of ring-shaped electrode patterns 21 are located on the same side of the radiation layer 1.

[0057] In the thickness direction of the radiation layer 1, the spacing between the plurality of ring-shaped electrode patterns 21 and the radiation layer 1 is not completely the same.

[0058] In the embodiment, the intervals between the plurality of ring-shaped electrode patterns 21 and the radiation layer 1 are not completely same, which indicates that at least part of the plurality of ring-shaped electrode patterns 21 are located on different planes, so that the interference between the plurality of ring-shaped electrode patterns 21 can be reduced, and the filtering structure has a better filtering effect.

[0059] Specifically, if the ring-shaped electrode patterns 21 are all located on the side of the radiation layer 1 close to the radiation patch 12, a second substrate layer can be arranged on the side of the radiation layer 1 close to the radiation patch 12, and the ring-shaped electrode patterns 21 are formed on the second substrate layer, at this time, the plurality of ring-shaped electrode patterns 21 can be located on the upper and lower sides of the transparent substrate, so that the intervals between the plurality of ring-shaped electrode patterns 21 and the radiation layer 1 are not completely same; if the ring-shaped electrode patterns 21 are all located on the side of the radiation layer 1 away from the radiation patch 12, the ring-shaped electrode patterns 21 can be formed on the surface of the first substrate layer 11 away from the radiation patch 12, or a third substrate layer can be arranged between the reflector plate 4 and the radiation layer 1 of the antenna unit, and the ring-shaped electrode patterns 21 are formed on both sides of the third substrate layer, at this time, part of the ring-shaped electrode patterns 21 can be formed on the first substrate layer 11, and part of the ring-shaped electrode patterns 21 can be formed on the third substrate layer between the reflector plate and the radiation layer 1. Among them, taking the radiation layer 1 as an example, the thickness direction of the radiation layer 1 is the direction indicated by the y axis. Figure 4

[0060] In an embodiment, continuing to refer to Figure 4 , the filtering structure 2 further comprises a second substrate layer 22.

[0061] Among them, part of the ring-shaped electrode patterns 21 are located on the side of the second substrate layer 22 away from the radiation layer 1, and part of the ring-shaped electrode patterns 21 are located on the side of the second substrate layer 22 close to the radiation layer 1.

[0062] ​In the embodiment, the second substrate layer 22 is also a transparent substrate layer, and the material of the second substrate layer 22 can be the same as that of the first substrate layer 11. The plurality of ring-shaped electrode patterns 21 can be partially located on the side of the second substrate layer 22 away from the radiation layer 1 and partially located on the side of the second substrate layer 22 close to the radiation layer 1. It should be noted that, at this time, the orthographic projections of the plurality of ring-shaped electrode patterns 21 on the first substrate layer 11 do not overlap, so as to avoid affecting the filtering between the plurality of ring-shaped electrode patterns 21. The number of ring-shaped electrode patterns 21 located on the side of the second substrate layer 22 away from the radiation layer 1 and the number of ring-shaped electrode patterns 21 located on the side of the second substrate layer 22 close to the radiation layer 1 are not specifically limited in the embodiment. For example, when the plurality of ring-shaped electrode patterns 21 includes three ring-shaped electrode patterns 21, one ring-shaped electrode pattern 21 can be located on the side of the second substrate layer 22 away from the radiation layer 1, and the remaining two ring-shaped electrode patterns 21 can be located on the side of the second substrate layer 22 close to the radiation layer 1. Alternatively, two ring-shaped electrode patterns 21 can be located on the side of the second substrate layer 22 away from the radiation layer 1, and the remaining one ring-shaped electrode pattern 21 can be located on the side of the second substrate layer 22 close to the radiation layer 1.

[0063] In an embodiment, continuing to refer to Figure 5 , the antenna unit further comprises a reflecting plate 4, and the reflecting plate 4 is located at the end of the feeding structure 3 away from the radiation layer 1.

[0064] In the embodiment, the filtering structure 2 is located on the side of the radiation layer 1 close to the reflecting plate 4, and the distance between the filtering structure 2 and the radiation layer 1 is less than or equal to the distance between the filtering structure 2 and the reflecting plate 4.

[0065] In the embodiment, the antenna unit further comprises a reflecting plate 4, and the reflecting plate 4 is located at the end of the feeding structure 3 away from the radiation layer 1. The reflecting plate 4 can comprise a transparent substrate and a metal mesh located on the side of the transparent substrate, so that the antenna unit has a transparent effect.

[0066] In the embodiment, the filtering structure 2 is located on the side of the radiation layer 1 close to the reflecting plate 4, and the distance between the filtering structure 2 and the radiation layer 1 is less than or equal to the distance between the filtering structure 2 and the reflecting plate 4.

[0067] For example, the distance between the filter structure 2 and the radiation layer 1 can be 0.25λ, and the distance between the filter structure 2 and the reflecting plate 4 can also be 0.25λ. Alternatively, the distance between the filter structure 2 and the radiation layer 1 can be 0.05λ, and the distance between the filter structure 2 and the reflecting plate 4 can be 0.2λ.

[0068] In an embodiment, continuing to refer to Figure 5 , part of the plurality of annular electrode patterns 21 is located on the side of the first substrate layer 11 away from the radiation patch 12.

[0069] In the embodiment, the filter structure 2 comprises a third substrate layer 23, and part of the plurality of annular electrode patterns 21 is located on the third substrate layer 23.

[0070] In the embodiment, the third substrate layer 23 can be the same as the first substrate layer 11 and the second substrate layer 22, and is a transparent substrate. The third substrate layer 23 is located between the radiation layer 1 and the reflecting plate 4. The annular electrode pattern 21 can be located on the side of the third substrate layer 23 away from the reflecting plate 4, or can be located on the side of the third substrate layer 23 close to the reflecting plate 4.

[0071] Specifically, part of the annular electrode pattern 21 can be located on the side of the first substrate layer 11 away from the radiation patch 12, and part of the annular electrode pattern 21 can be located on the side of the third substrate layer 23 away from the reflecting plate 4. Alternatively, part of the annular electrode pattern 21 can be located on the side of the first substrate layer 11 away from the radiation patch 12, and part of the annular electrode pattern 21 can be located on the side of the third substrate layer 23 close to the reflecting plate 4. Alternatively, part of the plurality of annular electrode patterns 21 can be located on the side of the first substrate layer 11 away from the radiation patch 12 and on the opposite sides of the third substrate layer 23. It should be noted that the orthographic projections of the plurality of annular electrode patterns 21 on the first substrate layer 11 do not overlap, so as to avoid affecting the filtering effect of the filter structure.

[0072] For any of the above embodiments, continuing to refer to Figure 3 , the filter structure 2 comprises a plurality of annular electrode patterns 21. In the orthographic projection of the first substrate layer 11, one annular electrode pattern 21 is located inside another annular electrode pattern 21.

[0073] In the embodiment, the geometric center of the orthographic projection of at least part of the annular electrode pattern 21 on the radiation layer 1 coincides.

[0074] In the embodiment, the orthographic projections of the plurality of annular electrode patterns 21 on the first substrate layer 11 can be regarded as a plurality of annular shapes around the center of the first substrate layer 11. The circumferences of the plurality of annular shapes increase from inside to outside, and one annular shape is located inside another annular shape, i.e., the two annular shapes do not overlap, so as to avoid affecting the filtering effect.

[0075] It can be understood that the circumference of each annular electrode pattern 21 is one wavelength of the corresponding filtering frequency, which can achieve the filtering effect of the corresponding frequency. Therefore, the shape of the annular electrode pattern 21 is not limited, and it can be a circle, square, parallelogram, rhombus, triangle, etc.; wherein, the shapes of the multiple annular electrode patterns 21 can be the same, or partially the same, or completely different. For example, the multiple annular electrode patterns 21 can be square rings, or some of the annular electrode patterns 21 can be circular rings and some can be square rings; wherein, referring to Figure 6 , Figure 6 Shown Figure 4 The top view of the filter structure 2 is shown as Figure 6 As shown, the filtering structure 2 includes three annular electrode patterns, namely annular electrode pattern 21a, annular electrode pattern 21b and annular electrode pattern 21c, wherein the annular electrode pattern 21a is a diamond ring, the annular electrode pattern 21b is a circular ring, and the annular electrode pattern 21c is a square ring.

[0076] In one embodiment, continue to refer to Figure 4 , the outer contour of the orthographic projection of the filtering structure 2 on the radiation layer 1 is located inside the radiation layer 1 .

[0077] Specifically, Figure 4 For example, the dimension of the filter structure 2 in at least the length direction, i.e., the direction indicated by the x-axis, is smaller than the dimension of the radiation layer 1 in the direction indicated by the x-axis, so that the orthographic projection of the filter structure 2 on the first substrate layer 11 overlaps with the radiation patch 12, thereby achieving a filtering effect. The dimension of the filter structure 2 in the width direction may be the same as that of the radiation layer 1, or may be smaller than that of the radiation layer 1, and this is not specifically limited in this embodiment.

[0078] In one embodiment, the distance between the orthographic projections of two adjacent annular electrode patterns 2 on the radiation layer 1 is greater than or equal to 0.25λ, where λ is the wavelength of the antenna unit in the working frequency band.

[0079] For example, the distance between the orthographic projections of two adjacent annular electrode patterns 2 on the radiation layer 1 may be 0.25λ, 0.3λ, 0.35λ, or 0.4λ, etc.

[0080] Specifically, when the distance between the orthographic projections of two adjacent annular electrode patterns 2 on the radiation layer 1 is greater than or equal to 0.25λ, the filtering effect between the two adjacent electrode patterns 2 is small, multiple filtering effects can be avoided, and the filtering effect of the antenna unit is improved.

[0081] In one embodiment, continue to refer to Figure 2The radiation patch 12 includes a first structural unit 121 and a second structural unit 122, and the first structural unit 121 and the second structural unit 122 are orthogonal;

[0082] The first structural unit 121 includes a first slit 131, and the second structural unit 122 includes a second slit 132. The orthogonal projections of the first slit 131 and the second slit 132 on the first substrate layer 11 are axisymmetric patterns with the diagonal line of the first substrate layer 11 as the axis of symmetry.

[0083] The orthogonal projections of the first slit 131 and the second slit 132 on the first substrate layer 11 do not overlap with the orthogonal projection of the annular electrode pattern 21 on the first substrate layer 11.

[0084] In this embodiment, a plurality of slits can be formed on the radiation patch 12 to generate partial high-frequency zero points and achieve filtering of partial frequency points. The radiation patch 12 includes orthogonal first and second structural units 121 and 122. The pattern obtained by rotating the first structural unit 121 (or the second structural unit 122) by 90° around the center of the radiation patch 12 is completely the same as the second structural unit 122 (or the first structural unit 121), so as to realize dual polarization. In addition, the first and second structural units 121 and 122 are symmetric patterns with the diagonal line of the first substrate layer 11 as the axis of symmetry. For example, the orthogonal projection of the first structural unit 121 on the first substrate layer 11 includes two cut-corner rectangles that are symmetric with respect to the diagonal line of the first substrate layer 11. Similarly, the orthogonal projection of the second structural unit 122 on the first substrate layer 11 also includes two symmetric cut-corner rectangles. Figure 5

[0085] To ensure the symmetry of the radiation patch 12 as a whole, the first slit 131 formed on the first structural unit 121 and the second slit 132 formed on the second structural unit 122 are also axisymmetric patterns with the diagonal line of the first substrate layer 11 as the axis of symmetry. The first slit 131 can include two parts, which are located on the two symmetric sides of the first structural unit 121, respectively.

[0086] Similarly, the second slit 132 can also include two parts, which are located on the two symmetric sides of the second structural unit 122, respectively. The orthogonal projection of each part of the first slit 131 or the second slit 132 on the first substrate layer 11 can be a straight line, an L shape, a U shape, a T shape, etc. The orthogonal projections of the first slit 131 and the second slit 132 on the first substrate layer 11 are symmetric patterns.

[0087] For example, the orthogonal projection of the first structural unit 121 on the first substrate layer 11 includes two cut-corner rectangles that are symmetric with respect to the diagonal line of the first substrate layer 11. Figure 7 Figure 7 ​​A planar structure schematic diagram of the radiation patch 12 is shown, wherein a is a structure schematic diagram of the first structure unit 121, and b is a structure schematic diagram of the second structure unit 122; the first slit 131 includes a first part 131a and a second part 131b, and each of the first part 131a and the second part 131b includes two straight slits perpendicular to each other, and the two straight slits are not overlapped, and the orthographic projection of the first part 131a and the second part 131b on the first substrate layer 11 is symmetrical with the diagonal line of the first substrate layer 11 as the axis of symmetry; similarly, the second slit 132 includes a third part 132a and a fourth part 132b, and each of the third part 132a and the fourth part 132b includes two straight slits perpendicular to each other, and the two straight slits are not overlapped, and the orthographic projection of the first part 231a and the second part 132b on the first substrate layer 11 is symmetrical with the diagonal line of the first substrate layer 11 as the axis of symmetry.

[0088] It should be noted that the orthographic projection of the first slit 131 and the second slit 132 on the first substrate layer 11 does not overlap with the orthographic projection of the ring-shaped electrode pattern 21 on the first substrate layer 11, so that the slits and the filter structure 2 opened on the radiation patch 12 include different filter frequency points, and multiple frequency point filtering is realized.

[0089] For example, the orthographic projection of the ring-shaped electrode pattern 21 on the first substrate layer 11 can be located inside the area enclosed by the orthographic projection of the first slit 131 and the second slit 132 on the first substrate layer 11, or the orthographic projection of the ring-shaped electrode pattern 21 on the first substrate layer 11 can be located outside the area enclosed by the orthographic projection of the first slit 131 and the second slit 132 on the first substrate layer 11, or part of the orthographic projection of the ring-shaped electrode pattern 21 on the first substrate layer 11 can be located inside the area enclosed by the orthographic projection of the first slit 131 and the second slit 132 on the first substrate layer 11, and part of the orthographic projection of the ring-shaped electrode pattern 21 on the first substrate layer 11 can be located outside the area enclosed by the orthographic projection of the first slit 131 and the second slit 132 on the first substrate layer 11.

[0090] The antenna unit provided by the embodiments of the present disclosure increases a plurality of ring-shaped electrode patterns 21 in the antenna unit and opens a plurality of slits on the radiation patch 12, so that the antenna unit can realize the filtering function and ensure that the antenna unit has a good gain effect, in addition, the feed structure 3, the radiation layer 1 and the filter structure 2 of the antenna unit all have a transparent effect, so that the antenna unit has high aesthetic appearance.

[0091] Next, the antenna unit provided by the embodiments of the present disclosure will be introduced in combination with specific examples:

[0092] Example one: refer to Figures 1-3 and Figure 7The antenna unit comprises a feeding structure 3, a radiation layer 1, a filtering structure 2 and a reflecting plate 4. The radiation layer 1 comprises a first substrate layer 11 and a radiation patch 12 located on the side of the first substrate layer 11 away from the feeding structure 3. The radiation patch 12 comprises a first structural unit 121 and a second structural unit 122. The shapes of the projections of the first structural unit 121 and the second structural unit 122 on the first substrate layer 11 are both two cut-corner rectangles symmetrical along the diagonal of the first substrate layer 11. The first structural unit 121 is provided with a first slit 131, and the second structural unit is provided with a second slit 132. The first slit 131 comprises a first part 131a and a second part 131b located on the two cut-corner rectangles of the first structural unit 121 respectively. The first part 131a and the second part 131b each comprise two straight slits perpendicular to each other and not overlapping with each other. The second slit 132 comprises a third part 132a and a fourth part 132b located on the two cut-corner rectangles of the second structural unit 122 respectively. The third part 132a and the fourth part 132b each comprise two straight slits perpendicular to each other and not overlapping with each other.

[0093] The filtering structure 2 is located on the side of the radiation layer 1 away from the feeding structure 3. The distance between the filtering structure 2 and the radiation layer 1 is 0.5λ, and λ is the wavelength of the antenna at 1.7 GHz. The filtering structure 2 comprises a second substrate layer 22 and two ring-shaped electrode patterns 21 located on the side of the second substrate layer 22 away from the radiation layer 1. The projections of the two ring-shaped electrode patterns 21 on the first substrate layer 11 form a character-shaped pattern. The distance between the two adjacent ring-shaped electrode patterns 21 is 0.25λ. Moreover, the projections of the two ring-shaped electrode patterns 21 on the first substrate layer 11 do not overlap with the projections of the first slit 131 and the second slit 132 on the first substrate layer 11. The circumferences of the larger square ring and the smaller square ring of the two ring-shaped electrode patterns 21 are 224 mm and 89 mm respectively.

[0094] The radiation layer 1, the filtering structure 2 and the reflecting plate 4 each comprise a transparent substrate composed of transparent PET material, OCA adhesive and PC plate, and a metal mesh film layer or a transparent conductive layer located on the surface of the transparent substrate. The feeding structure 3 is a balun feeding assembly. The transparent substrate is formed by laminating OCA adhesive and transparent PET material on both sides of the PC plate, and the metal mesh film layer or the transparent conductive layer is formed on the surfaces of both sides, so that the whole antenna unit is transparent.

[0095] The simulation of the antenna unit provided in Example 1 is performed, and the results are shown in Figures 8-10 Figure 8 is the gain diagram of the antenna unit provided in Example 1, Figure 9 ​The horizontal plane radiation pattern of the antenna unit provided in Example One is shown, wherein curves 1-11 are respectively the horizontal plane radiation pattern of the antenna unit at 1.9GHz-2.6GHz frequencies and 0 degrees elevation, Figure 10 The vertical plane radiation pattern of the antenna unit provided in Example One is shown, wherein curves 1-11 are respectively the vertical plane radiation pattern of the antenna unit at 1.9GHz-2.6GHz frequencies and 0 degrees elevation, according to Figures 8-10 It can be seen that the antenna gain in the entire frequency band is between 7.6-8dBi, the in-band gain is flat, the antenna horizontal and vertical plane wave width in the frequency band is between 60.5-68.8, is relatively stable, and the cross-polarization ratio of the antenna 0° direction is greater than 33.3dB, has good polarization isolation. Comparing Example One with the antenna unit not including the filtering structure and related technology, the results shown in Figure 11 are obtained, wherein curve 1 is the gain curve of the antenna unit in the related technology, curve 2 is the gain curve of the antenna unit provided in Example One, according to Figure 11 It can be seen that compared with the antenna unit in the related technology, the antenna unit provided in Example One has good suppression effect at 1.1GHz, 3.3GHz and 4GHz, and in the entire communication frequency band of 1.7GHz-2.7GHz, the antenna gain is basically lossless, indicating that the filtering antenna can work normally in the frequency band and has good out-of-band suppression capability.

[0096] Example Two: referring to Figure 2 , Figure 4 , Figure 6 and Figure 7 , the antenna unit includes a feeding structure 3, a radiation layer 1, a filtering structure 2 and a reflecting plate 4, wherein the radiation layer 1 includes a first substrate layer 11 and a radiation patch 12 located on the side of the first substrate layer 11 away from the feeding structure 3, the radiation patch 12 includes a first structure unit 121 and a second structure unit 122, the first structure unit 121 and the second structure unit 122 are both in the shape of two cut-corner rectangles symmetrical along the diagonal of the first substrate layer 11 in orthographic projection on the first substrate layer 11; wherein the first structure unit 121 is provided with a first slit 131, and the second structure unit is provided with a second slit 132, the first slit 131 includes a first part 131a and a second part 131b located on the two cut-corner rectangles of the first structure unit 121 respectively, the first part 131a and the second part 131b both include two straight slits perpendicular to each other and not overlapping between the two straight slits; the second slit 132 includes a third part 132a and a fourth part 132b located on the two cut-corner rectangles of the second structure unit 122 respectively, the third part 132a and the third part 132b both include two straight slits perpendicular to each other and not overlapping between the two straight slits.

[0097] The filter structure 2 is located on the same side of the radiation layer 1 as the radiation patch 12, the distance between the filter structure 2 and the radiation layer 1 is 0.5λ, λ is the wavelength of the antenna at 1.7GHz, the filter structure 2 includes a second substrate layer 22 and three annular electrode patterns 21 located on the side of the second substrate layer 22 away from the radiation layer 1, the shapes of the three annular electrode patterns 21 are different, and the distance between two adjacent annular electrode patterns 21 is 0.25λ. Moreover, the orthographic projection of the three annular electrode patterns 21 on the first substrate layer 11 does not overlap with the orthographic projection of the first slit 131 and the second slit 132 on the first substrate layer 11.

[0098] Wherein, the radiation layer 1, the filter structure 2 and the reflector plate 4 all include a transparent substrate composed of transparent PET material, OCA adhesive, PC plate, and a metal mesh film layer or a transparent conductive layer located on the surface of the transparent substrate; the feed structure 3 is a balun feed assembly, which forms a transparent substrate by laminating OCA adhesive and transparent PET material on both sides of the PC plate, and forms a metal mesh film layer or a transparent conductive layer on both surfaces, so that the whole antenna unit is transparent.

[0099] Example three: refer to Figure 2 , Figure 3 , Figure 5 and Figure 7 , the antenna unit includes a feed structure 3, a radiation layer 1, a filter structure 2 and a reflector plate 4, wherein the radiation layer 1 includes a first substrate layer 11 and a radiation patch 12 located on the side of the first substrate layer 11 away from the feed structure 3, the radiation patch 12 includes a first structure unit 121 and a second structure unit 122, the orthographic projection shapes of the first structure unit 121 and the second structure unit 122 on the first substrate layer 11 are both two cut-corner rectangles symmetrical along the diagonal of the first substrate layer 11; wherein the first structure unit 121 is provided with a first slit 131, and the second structure unit is provided with a second slit 132, the first slit 131 includes a first part 131a and a second part 131b located on the two cut-corner rectangles of the first structure unit 121 respectively, the first part 131a and the second part 131b both include two mutually perpendicular straight slits, and the two straight slits do not overlap; the second slit 132 includes a third part 132a and a fourth part 132b located on the two cut-corner rectangles of the second structure unit 122 respectively, the third part 132a and the third part 132b both include two mutually perpendicular straight slits, and the two straight slits do not overlap.

[0100] The filter structure 2 is located between the radiation layer 1 and the reflector 4. The filter structure 2 includes a third substrate layer 23 and two annular electrode patterns 21. One annular electrode pattern 21 is located on the side of the first substrate layer 11 facing away from the radiation patch 12, and the other annular electrode pattern 21 is located on the side of the third substrate layer 23 close to the radiation layer 1. The orthographic projections of the two annular electrode patterns 21 on the first substrate layer 11 are in the shape of a circle. The spacing between two adjacent annular electrode patterns 21 is 0.25λ, where λ is the antenna wavelength at 1.7GHz. Furthermore, the orthographic projections of the two annular electrode patterns 21 on the first substrate layer 11 do not overlap with the orthographic projections of the first slit 131 and the second slit 132 on the first substrate layer 11.

[0101] Among them, the radiation layer 1, the filtering structure 2 and the reflector 4 all include a transparent substrate composed of transparent PET material, OCA adhesive, and a PC board, and a metal mesh film layer or a transparent conductive layer located on the surface of the transparent substrate; the feeding structure 3 is a balun feeding component, which is formed by laminating OCA adhesive and transparent PET material on both sides of the PC board to form a transparent substrate, and forming a metal mesh film layer or a transparent conductive layer on both sides of the surface, so that the antenna unit as a whole is transparent.

[0102] Example 4: Figure 3 、 Figure 4 as well as Figure 12 , Figure 12 A top view of the radiating layer 1 of the antenna unit in this example is shown, where the antenna unit includes a feeding structure 3, a radiating layer 1, a filtering structure 2, and a reflector 4, wherein the radiating layer 1 includes a first substrate layer 11 and a radiating patch 12 located on the side of the first substrate layer 11 away from the feeding structure 3, the radiating patch 12 includes a first structural unit 121 and a second structural unit 122, and the orthographic projections of the first structural unit 121 and the second structural unit 122 on the first substrate layer 11 are both two ellipses symmetrical along the diagonal of the first substrate layer 11; wherein the first structural unit 121 is provided with a first slot 131, and the second structural unit is provided with a second slot 132, the first slot 131 includes two T-shaped slots located in the two ellipses of the first structural unit 121 respectively; the second slot 132 includes two T-shaped slots located in the two ellipses of the second structural unit 122 respectively.

[0103] The filter structure 2 is located between the radiation layer 1 and the reflecting plate 4, and the filter structure 2 comprises a third substrate layer 23 and two annular electrode patterns 21, one of which is located on the side of the first substrate layer 11 away from the radiation patch 12, and the other is located on the side of the third substrate layer 23 close to the radiation layer 1, the orthographic projection of the two annular electrode patterns 21 on the first substrate layer 11 is a Chinese character-shaped, the distance between the two adjacent annular electrode patterns 21 is 0.25λ, and λ is the wavelength of the antenna at 1.7GHz. Moreover, the orthographic projection of the two annular electrode patterns 21 on the first substrate layer 11 does not overlap with the orthographic projection of the first and second slots 131 and 132 on the first substrate layer 11.

[0104] The radiation layer 1, the filter structure 2 and the reflecting plate 4 all comprise a transparent substrate composed of transparent PET material, optical glue, PC plate, and a metal mesh film layer or a transparent conductive layer on the surface of the transparent substrate; the feed structure 3 is a balun feed assembly, which forms a transparent substrate by laminating optical glue and transparent PET material on both sides of the PC plate, and forms a metal mesh film layer or a transparent conductive layer on the surfaces of both sides, so that the whole antenna unit is transparent.

[0105] Based on the same inventive concept, the embodiment of the present disclosure also provides an antenna device comprising the antenna unit of any of the above-mentioned embodiments.

[0106] Each of the embodiments in the specification is described in a progressive manner, and each embodiment focuses on the difference from other embodiments, and the same or similar parts between the embodiments can be referred to each other.

[0107] Finally, it should be noted that, in this document, the relationship terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between the entities or operations. Moreover, the terms "include", "contain" or any other variants thereof are intended to cover non-exclusive inclusion, so that the process, method, product or equipment including a series of elements not only includes those elements, but also includes other elements not explicitly listed or inherent to such process, method, product or equipment. Without more limitations, the element defined by the statement "including a" does not exclude the presence of other identical elements in the process, method, product or equipment including the element.

[0108] The above is a detailed introduction to an antenna unit and antenna device provided by the present disclosure. Specific examples are used herein to illustrate the principles and implementation methods of the present disclosure. The description of the above embodiments is only used to help understand the method and core ideas of the present disclosure. At the same time, for those skilled in the art, according to the ideas of the present disclosure, there will be changes in the specific implementation methods and application scopes. In summary, the content of this specification should not be understood as a limitation on the present disclosure.

[0109] Other embodiments of the present disclosure will readily occur to those skilled in the art after considering the specification and practicing the invention disclosed herein. This disclosure is intended to cover any variations, uses, or adaptations of the present disclosure that follow the general principles of the present disclosure and include common knowledge or customary techniques in the art not disclosed herein. The description and examples are to be considered as exemplary only, with the true scope and spirit of the present disclosure being indicated by the following claims.

[0110] It should be understood that the present disclosure is not limited to the exact structures that have been described above and shown in the drawings, and that various modifications and changes can be made without departing from the scope thereof. The scope of the present disclosure is limited only by the appended claims.

[0111] References herein to "one embodiment," "an embodiment," or "one or more embodiments" mean that a particular feature, structure, or characteristic described in connection with the embodiment is included in at least one embodiment of the present disclosure. Furthermore, please note that instances of the phrase "in one embodiment" do not necessarily all refer to the same embodiment.

[0112] In the description provided herein, numerous specific details are described. However, it is understood that embodiments of the present disclosure may be practiced without these specific details. In some instances, well-known methods, structures, and techniques are not shown in detail so as not to obscure the understanding of this description.

[0113] In the claims, any reference signs placed between parentheses shall not be construed as limiting the claim. The word "comprising" does not exclude the presence of elements or steps not listed in the claim. The word "a" or "an" preceding an element does not exclude the presence of a plurality of such elements. The present disclosure may be implemented by means of hardware comprising several different elements and by means of a suitably programmed computer. In a unit claim enumerating several means, several of these means may be embodied by the same item of hardware. The use of the words first, second, and third etc. does not indicate any order. These words may be interpreted as names.

[0114] Finally, it should be noted that: the above examples are only used to illustrate the technical solutions of the present disclosure, but not to limit them; although the present disclosure has been described in detail with reference to the foregoing examples, those skilled in the art should understand that: it can still modify the technical solutions recorded in the foregoing examples, or make equivalent replacement for part of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present disclosure.

Claims

1. An antenna unit, characterized in that: include: Feed structure; a radiation layer, located on one side of the feed structure, comprising a first substrate layer and a radiation patch located on a side of the first substrate layer facing away from the feed structure; wherein the first substrate layer is a transparent substrate layer; a filtering structure, arranged with the radiation patch in the thickness direction of the radiation layer, and having a spacing between the filtering structure and the radiation patch in the thickness direction of the radiation layer; The filtering structure includes at least one annular electrode pattern, and an orthographic projection of the annular electrode pattern on the first substrate layer at least partially overlaps with an orthographic projection of the radiation patch on the first substrate layer.

2. The antenna unit according to claim 1, wherein: The filtering structure includes a plurality of annular electrode patterns, and the plurality of annular electrode patterns are located on the same side of the radiation layer; Wherein, in the thickness direction of the radiation layer, the intervals between the plurality of the annular electrode patterns and the radiation layer are not completely the same.

3. The antenna unit according to claim 2, wherein: The filtering structure further includes a second substrate layer; Part of the annular electrode pattern is located on a side of the second base layer away from the radiation layer, and part of the annular electrode pattern is located on a side of the second base layer close to the radiation layer.

4. The antenna unit according to claim 2, wherein: The antenna unit further includes a reflector, which is located at an end of the feed structure away from the radiation layer; The filtering structure is located on a side of the radiation layer close to the reflector, and the distance between the filtering structure and the radiation layer is less than or equal to the distance between the filtering structure and the reflector.

5. The antenna unit according to claim 4, characterized in that Some of the plurality of annular electrode patterns are located on a side of the first substrate layer away from the radiation patch; The filtering structure includes a third base layer, and some of the multiple annular electrode patterns are located on the third base layer.

6. The antenna unit according to any one of claims 1 to 5, characterized in that: The filtering structure includes a plurality of the annular electrode patterns; wherein, in the orthographic projection of two adjacent annular electrode patterns on the first substrate layer, one annular electrode pattern is located inside the other annular electrode pattern.

7. The antenna unit according to claim 6, characterized in that The geometric centers of at least some of the annular electrode patterns' orthographic projections on the radiation layer coincide with each other.

8. The antenna unit according to claim 1, wherein: An outer contour of the orthographic projection of the filtering structure on the radiation layer is located inside the radiation layer.

9. The antenna unit according to claim 1, wherein: The distance between the orthographic projections of two adjacent annular electrode patterns on the radiation layer is greater than or equal to 0.25λ, where λ is the wavelength of the antenna unit in the working frequency band.

10. The antenna unit according to item 1, characterized in that The radiation patch includes a first structural unit and a second structural unit, wherein the first structural unit is orthogonal to the second structural unit; The first structural unit includes a first slit, the second structural unit includes a second slit, and the orthographic projections of the first slit and the second slit on the first base layer are axially symmetrical figures with the diagonal line of the first base layer as the symmetry axis; The orthographic projections of the first slit and the second slit on the first base layer do not overlap with the orthographic projection of the annular electrode pattern on the first base layer.

11. An antenna device, characterized in that: The invention comprises the antenna unit as described in any one of claims 1 to 10.

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