Filtering antenna and electronic equipment

Abstract

The invention provides a filtering antenna and electronic equipment, and belongs to the technical field of antennas. The filtering antenna comprises a first dielectric layer, a first conductor layer and a feed layer. The first conductor layer and the feed layer are respectively positioned on the upper and lower surfaces of the first dielectric layer; the first conductor layer comprises a first gap and a second gap, the first gap is located in the middle of the first conductor layer and is of an asymmetric structure, and the second gap is located between the first gap and the first edge of the first dielectric layer; the feed layer comprises an excitation port, a filtering structure and a feeder line; the excitation port is located at the first edge, the filtering structure is electrically connected with the excitation port, one end of the feeder line is in telecommunication connection with the filtering structure, and the other end of the feeder line extends into a corresponding area of the first gap. The filtering antenna has the advantages of being small in size, simple in structure, good in bandwidth, stable in gain and the like, and is more suitable for a 5G millimeter wave wireless communication system.

Description

Technical Field

[0001] This application relates to the technical field of antennas, and particularly to a filtering antenna and an electronic device. Background Art

[0002] With the rapid development of millimeter-wave communication technology, the wireless communication module of electronic devices is developing towards miniaturization, high integration, and high efficiency. For the important components in the wireless communication module: antennas and filters, for better integration and miniaturization, antennas and filters are comprehensively designed into a module - a filtering antenna (Filering antenna, Filtenna).

[0003] In related technologies, there are still problems with the performance of filtering antennas in terms of bandwidth and axial ratio. Summary of the Invention

[0004] This application provides a filtering antenna and an electronic device, which can solve the problems of insufficient performance of filtering antennas in terms of bandwidth and axial ratio.

[0005] The technical solution is as follows:

[0006] On the one hand, a filtering antenna is provided. The filtering antenna includes: a first dielectric layer, a first conductor layer, and a feeding layer;

[0007] The first conductor layer and the feeding layer are respectively located on the upper and lower surfaces of the first dielectric layer;

[0008] The first conductor layer includes a first slot and a second slot. The first slot is located in the middle of the first conductor layer, and the first slot is an asymmetric structure. The second slot is located between the first slot and the first edge of the first dielectric layer;

[0009] The feeding layer includes an excitation port, a filtering structure, and a feeding wire;

[0010] The excitation port is located at the first edge. The filtering structure is electrically connected to the excitation port. One end of the feeding wire is electrically connected to the filtering structure, and the other end of the feeding wire extends into the corresponding area of the first slot.

[0011] In some embodiments, the excitation port includes a conductive patch extending inwards along the first edge;

[0012] The filtering structure includes a first conductive branch and a second conductive branch. The first conductive branch and the second conductive branch are respectively electrically connected to the conductive patch;

[0013] The first conductive stub and the second conductive stub are arranged at intervals, the end of the feeder line is located between the first conductive stub and the second conductive stub, and the feeder line is not in electrical contact with any of the first conductive stub, the second conductive stub, and the conductive patch.

[0014] In some embodiments, the first conductive stub and the second conductive stub are arranged in parallel at intervals on both sides of the feeder line.

[0015] In some embodiments, the shapes of the first conductive stub and the second conductive stub are symmetric or asymmetric along the feeder line.

[0016] In some embodiments, the filtering structure further includes a third conductive stub, the third conductive stub is located at the end of the first conductive stub or the second conductive stub facing the middle of the first dielectric layer, and the third conductive stub is used to construct at least one closed conductive loop at the end of the first conductive stub or the second conductive stub.

[0017] In some embodiments, the third conductive stub is a closed loop or an open loop;

[0018] When the third conductive stub is a closed loop, the third conductive stub is electrically connected to the end of the first conductive stub or the second conductive stub;

[0019] When the third conductive stub is an open loop, the third conductive stub is connected to the side of the first conductive stub or the second conductive stub facing away from the feeder line, and a partial structure of the first conductive stub or the second conductive stub closes the third conductive stub.

[0020] In some embodiments, the third conductive stub is an open rectangular loop, the third conductive stub is connected to the side of the first conductive stub or the second conductive stub facing away from the feeder line, and a partial structure of the first conductive stub or the second conductive stub serves as the unclosed side of the third conductive stub to close the third conductive stub.

[0021] In some embodiments, the size of the conductive patch in the first direction is L11, and the size of the conductive patch in the second direction is W1, where the value range of L11 / W1 is 1-2;

[0022] and / or,

[0023] The width of the feeder line is W2, and the widths of the first conductive stub and the second conductive stub are both W3, where the value range of W1 / W3 is 2-3;

[0024] and / or,

[0025] The distance W4 between the first conductive branch or the second conductive branch and the feeder line ranges from 0.08 to 0.16 mm;

[0026] Wherein, the first direction is the extending direction of the feeder line, and the second direction is perpendicular to the first direction.

[0027] In some embodiments, the extending length of the filtering structure in the first direction is L12, and the overlapping length of the filtering structure and the projection of the feeder line in the first direction is L13, wherein the value range of L13 / L12 is 0.75 - 0.95.

[0028] In some embodiments, the first slot is rectangular, and a first perturbation sheet and a second perturbation sheet are arranged in the first slot. Both the first perturbation sheet and the second perturbation sheet are rectangular and have different areas;

[0029] The first perturbation sheet and the second perturbation sheet are respectively arranged at two of the four opposite corners of the first slot and are respectively electrically connected to the first conductor layer.

[0030] In some embodiments, the area of the first slot is S0, the area of the first perturbation sheet is S1, the area of the second perturbation sheet is S2, and the area of the second slot is S3;

[0031] Wherein, the quality factor Q of the filtering antenna is inversely proportional to the sum of the areas of the first perturbation sheet, the second perturbation sheet and the second slot, S1 + S2 + S3;

[0032] The quality factor Q of the filtering antenna is directly proportional to the area S0 of the first slot.

[0033] In some embodiments, the filtering antenna further includes a periodic structure layer and a second dielectric layer. The second dielectric layer is located on the side of the feeding layer away from the first dielectric layer, and the periodic structure layer is located on the side of the second dielectric layer away from the feeding layer.

[0034] In some embodiments, the periodic structure layer includes a patch array layer, a third dielectric layer and a second conductor layer arranged in a stacked manner;

[0035] The patch array layer is located on the side of the third dielectric layer facing the second dielectric layer, and the second conductor layer is located on the side of the third dielectric layer away from the second dielectric layer;

[0036] Each patch unit in the patch array layer respectively penetrates through the third dielectric layer along the stacking direction through a metal via to electrically connect to the second conductor layer.

[0037] On the other hand, an electronic device is provided, which includes the filtering antenna described in the present application.

[0038] The beneficial effects brought by the technical solution provided in the present application at least include:

[0039] The filtering antenna of the present application utilizes the asymmetric first slot and second slot to achieve the circular polarization radiation characteristics of wide bandwidth, low profile, and good directivity. By arranging a filtering structure between the excitation port and the feeder line, the impedance bandwidth and axial ratio bandwidth of the filtering antenna are further improved, making the filtering antenna have the advantages of small size, simple structure, good bandwidth, and stable gain, and being more suitable for 5G millimeter-wave wireless communication systems. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the drawings in the following description are only some embodiments of the present application. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0041] Figure 1 is an exploded view of the structure of the filtering antenna provided by the embodiment of the present application;

[0042] Figure 2 is a schematic structural diagram of the feeding layer provided by the embodiment of the present application;

[0043] Figure 3 is a schematic structural diagram of the feeding layer provided by another embodiment of the present application;

[0044] Figure 4 is a schematic diagram of the working principle of the filtering structure provided by the embodiment of the present application;

[0045] Figure 5 is a schematic structural diagram of the first conductor layer provided by the embodiment of the present application;

[0046] Figure 6 is a schematic structural diagram of the periodic structure layer provided by the embodiment of the present application;

[0047] Figure 7 is a performance test diagram of the filtering antenna provided by the embodiment of the present application.

[0048] The reference numerals in the drawings are respectively represented as:

[0049] 1. First dielectric layer;

[0050] 11. First edge;

[0051] 2. First conductor layer;

[0052] 21. First gap; 211. First perturbation piece; 212. Second perturbation piece; 22. Second gap;

[0053] 3. Feeding layer;

[0054] 31. Excitation port; 311. Conductive patch; 32. Feeding wire; 33. Filtering structure; 331. First conductive branch; 332. Second conductive branch; 333. Third conductive branch;

[0055] 4. Periodic structure layer;

[0056] 41. Patch array layer; 42. Third dielectric layer; 43. Second conductor layer; 44. Metal via;

[0057] 5. Second dielectric layer;

[0058] a. First direction; b. Second direction. Detailed implementation mode

[0059] Here, the exemplary embodiments will be described in detail, and the examples are shown in the drawings. When the following description refers to the drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements. The implementation manners described in the following exemplary embodiments do not represent all the implementation manners consistent with the present application. On the contrary, they are only examples of the devices and methods consistent with some aspects of the present application as detailed in the appended claims.

[0060] In the description of the present application, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate the orientation or positional relationship based on the Figure 1 orientation or positional relationship shown, and are only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present application.

[0061] Unless otherwise defined, all technical terms used in the embodiments of the present application have the same meaning as commonly understood by those of ordinary skill in the art.

[0062] The wireless communication module mainly consists of three parts: an antenna, a radio frequency front end, and a main chip, which are used for the mutual conversion between binary signals and radio electromagnetic wave signals during signal transmission and reception: converting binary signals into high-frequency radio electromagnetic wave signals during signal transmission; and converting received electromagnetic wave signals into binary digital signals during signal reception. Among them, the filter is a key component in the radio frequency front end.

[0063] The function of the antenna is to transmit and receive electromagnetic wave signals. The function of the filter is to perform frequency selection and filter out unwanted out-of-band spurious signals, thereby effectively improving the anti-interference ability of the entire mobile phone communication system. Therefore, improving the performance of both can improve the transmission efficiency and communication quality of the wireless communication module. For better integration and miniaturization, the antenna and the filter are integrally designed into a module - a filtering antenna, which has received extensive attention in the industry.

[0064] A circularly polarized antenna can receive electromagnetic waves in any polarization direction, which can reduce the energy loss caused by polarization mismatch of the signal. Therefore, circularly polarized antennas are widely used in mobile phone navigation. However, most of the current designs for filtering antennas focus on linearly polarized performance antennas, and the design of filtering antennas with circularly polarized performance is relatively difficult, which makes many advantages of circular polarization unable to be realized in filtering antennas.

[0065] Therefore, this application provides a filtering antenna, which has broadbandwidth, low profile, and good directivity circularly polarized radiation characteristics, and arranges a filtering structure to improve the impedance bandwidth and axial ratio bandwidth of the filtering antenna, making the filtering antenna have advantages such as small size, simple structure, good bandwidth, and stable gain, and is more suitable for 5G millimeter-wave wireless communication systems.

[0066] The technical solution provided by this application is applicable to electronic devices using one or more of the following communication technologies: Bluetooth (BT) communication technology, Global Positioning System (GPS) communication technology, Wireless Fidelity (WiFi) communication technology, Global System for Mobile Communications (GSM) communication technology, Wideband Code Division Multiple Access (WCDMA) communication technology, Long Term Evolution (LTE) communication technology, 5G communication technology, and future other communication technologies, etc.

[0067] The electronic device in the embodiments of the present application may be a mobile phone, a tablet computer, a laptop computer, a smart bracelet, a smart watch, a smart helmet, a smart glasses, etc. The electronic device may also be a cellular phone, a cordless phone, a Session Initiation Protocol (SIP) phone, a Wireless Local Loop (WLL) station, a Personal Digital Assistant (PDA), a handheld device with wireless communication function, a computing device or other processing devices connected to a wireless modem, a vehicle-mounted device, an electronic device in a 5G network or an electronic device in a future evolved Public Land Mobile Network (PLMN), etc. The embodiments of the present application are not limited thereto.

[0068] In some cases, the electronic device may perform multiple functions (for example, playing music, displaying videos, storing pictures, and receiving and sending phone calls). If necessary, the electronic device may be a device such as a cellular phone, a media player, other handheld devices, a wristwatch device, a pendant device, a headset device, or other compact portable devices.

[0069] To make the objectives, technical solutions, and advantages of the present application clearer, the following will further describe the embodiments of the present application in detail with reference to the accompanying drawings.

[0070] On the one hand, as shown in Figure 1 this embodiment provides a filtering antenna, which includes: a first dielectric layer 1, a first conductor layer 2, and a feeding layer.

[0071] The first conductor layer 2 and the feeding layer 3 are respectively located on the upper and lower surfaces of the first dielectric layer 1.

[0072] The first conductor layer 2 includes a first slot 21 and a second slot 22. The first slot 21 is located in the middle of the first conductor layer 2, and the first slot 21 has an asymmetric structure. The second slot 22 is located between the first slot 21 and the first edge 11 of the first dielectric layer 1.

[0073] The feeding layer includes an excitation port 31, a filtering structure 33, and a feeding line 32. The excitation port 31 is located at the first edge 11. The filtering structure 33 is electrically connected to the excitation port 31. One end of the feeding line 32 is electrically connected to the filtering structure 33, and the other end of the feeding line 32 extends into the corresponding area of the first slot 21.

[0074] The filtering antenna of this embodiment utilizes the asymmetric first slot 21 and second slot 22 to achieve circularly polarized radiation characteristics with wide bandwidth, low profile, and good directivity. By arranging a filtering structure 33 between the excitation port 31 and the feeder line 32, the impedance bandwidth and axial ratio bandwidth of the filtering antenna are further improved, making the filtering antenna have the advantages of small size, simple structure, good bandwidth, and stable gain, and being more suitable for 5G millimeter-wave wireless communication systems.

[0075] In addition, the structure of the filtering antenna of this application is simple. Based on processing, integration, and packaging, the problem of complex structure of the filtering antenna is solved.

[0076] The first slot 21 and the second slot 22 in this embodiment can form a perturbation structure. By using this perturbation structure, two electric field components with the same amplitude and a phase difference of 90° can be generated in the filtering antenna, so as to radiate circularly polarized electromagnetic waves outward. At the same time, the second slot 22 located between the first slot 21 and the excitation port 31 can introduce additional resonance zeros, increasing the impedance matching of the filtering antenna in this embodiment.

[0077] It should be noted that the first slot 21 in this embodiment is an asymmetric structure, indicating that the first slot 21 is neither an axisymmetric structure nor a point-symmetric structure.

[0078] In some possible implementation manners, the material of the first conductor layer 2 is copper.

[0079] Optionally, with the surface of the first dielectric layer 1 as the reference plane, it is filled with copper so that the surface of the first dielectric layer 1 is evenly and comprehensively covered with copper.

[0080] Another option is that the first conductor layer 2 is formed by fitting a copper foil to the surface of the first dielectric layer 1.

[0081] In some other possible implementation manners, the feeding layer 3 is formed by printing on the surface of the first dielectric layer 1 using a printing process.

[0082] In some other possible implementation manners, the main function of the first dielectric layer 1 is the antenna radiation layer and the filtering function layer. Optionally, Rogers 5880 dielectric material with a dielectric constant of 2.2, a loss tangent of 0.0009, and a thickness of 0.508 mm is used. Thus, it has the advantages that the material can be processed and produced and stably applied, the electromagnetic loss is small, the material cost is low, and it is beneficial to control the cost of the filtering antenna.

[0083] Exemplarily, the first slit 21 of the present embodiment is formed by combining a basic shape feature and an additional shape feature, making it have an asymmetric characteristic, where the basic shape feature includes but is not limited to a rectangle, a circle, an ellipse, a triangle, an L shape, a T shape, a U shape, an E shape, etc., and the additional shape feature also includes but is not limited to a rectangle, a circle, an ellipse, a triangle, an L shape, a T shape, a U shape, an E shape, etc.

[0084] Another exemplarily, the shape of the second slit 22 includes but is not limited to a rectangle, a circle, an ellipse, a triangle, an L shape, a T shape, a U shape, an E shape, etc.

[0085] Combined Figure 2 As shown, in some embodiments, the excitation port 31 includes a conductive patch 311 extending inwards along the first edge 11; the filtering structure 33 includes a first conductive branch 331 and a second conductive branch 332, and the first conductive branch 331 and the second conductive branch 332 are electrically connected to the conductive patch 311 respectively.

[0086] The first conductive branch 331 and the second conductive branch 332 are arranged at intervals, and the end of the feeder line 32 is located between the first conductive branch 331 and the second conductive branch 332, and the feeder line 32 is not in electrical contact with any one of the first conductive branch 331, the second conductive branch 332, and the conductive patch 311.

[0087] In this embodiment, the first conductive branch 331 and the second conductive branch 332 in the filtering structure 33 are electrically connected through the conductive patch 311 and are distributed on both sides of the end of the feeder line 32. The first conductive branch 331 and the second conductive branch 332 can play a filtering effect at the end of the feeder line 32. Compared with the filter in the related art, it has the advantages of simple structure, easy encapsulation and processing, etc., and is more suitable for 5G millimeter-wave wireless communication systems.

[0088] In some possible implementation manners, the conductive patch 311 is formed on the surface of the first dielectric layer 1 by processes such as copper plating process, metal printing, etc.

[0089] Combined Figure 2 As shown, in some embodiments, the first conductive branch 331 and the second conductive branch 332 are arranged in parallel at intervals on both sides of the feeder line 32.

[0090] Through the above arrangement, the first conductive branch 331 and the second conductive branch 332 can form currents parallel to the extension direction of the feeder line 32 on both sides of the feeder line 32, and can achieve a filtering effect.

[0091] In some embodiments, the shapes of the first conductive branch 331 and the second conductive branch 332 are symmetric or asymmetric along the feed line 32. The shapes of the first conductive branch 331 and the second conductive branch 332 can be symmetric or asymmetric. When the shapes of the first conductive branch 331 and the second conductive branch 332 are asymmetric, a gain zero point can be constructed in a certain conductive branch, and finally the filtering function is realized.

[0092] Combined Figure 3 As shown, in some embodiments, the filtering structure 33 further includes a third conductive branch 333. The third conductive branch 333 is located at the end of the first conductive branch 331 or the second conductive branch 332 facing the middle of the first dielectric layer 1. The third conductive branch 333 is used to construct at least one closed conductive loop at the end of the first conductive branch 331 or the second conductive branch 332.

[0093] Through the above arrangement, the third conductive branch 333 can construct a closed conductive loop at the end of the first conductive branch 331 or the second conductive branch 332. At a certain moment, the current of the closed conductive loop is cancelled, so that the antenna radiation cannot be excited, and a gain zero point is constructed, thereby realizing the filtering purpose.

[0094] Exemplarily, the third conductive branch 333 is located at the end of the second conductive branch 332, and a closed conductive loop is constructed at the end of the second conductive branch 332. Thus, the second conductive branch 332 and the third conductive branch 333 are constructed into a shape similar to 9 and are located on the left side of the feed line 32. The first conductive branch 331 is linear and is located on the right side of the feed line 32. The first conductive branch 331 and the second conductive branch 332 are asymmetric.

[0095] Refer to Figure 4 As shown, when the current of the second conductive branch 332 is upward and the feed line 32 and the first conductive branch 331 are downward, the equivalent subtracted current is 0. Thus, there is no current at the second conductive branch 332 and the third conductive branch 333, so that the antenna radiation cannot be excited, which constructs a gain zero point, and thus the filtering effect can be realized.

[0096] For the filtering structure provided in this embodiment, the first conductive branch 331, the second conductive branch 332, the third conductive branch 333 and the middle feed line 32 form a three-finger filtering structure, which has advantages such as broadband, simple structure, zero-point controllability, and mature theory. And compared with the three-finger filter in the related technology, it has the advantages of simple structure, convenient packaging and processing, and is very suitable for application in 5G millimeter-wave wireless communication systems.

[0097] Exemplarily, the widths of the first conductive branch 331, the second conductive branch 332, and the third conductive branch 333 are the same. By adjusting the widths of the first conductive branch 331, the second conductive branch 332, and the third conductive branch 333, the position of the gain zero point can be controlled, so that the filtering structure 33 has better adaptability and can meet the filtering requirements of different filtering antennas.

[0098] In some possible implementation manners, the third conductive branch 333 can be formed into a rectangle, a square, a circle, an ellipse, etc., and the present application does not limit this.

[0099] In some embodiments, the third conductive branch 333 is a closed ring or an unclosed ring.

[0100] When the third conductive branch 333 is a closed ring, the third conductive branch 333 is electrically connected to the end of the first conductive branch 331 or the second conductive branch 332.

[0101] When the third conductive branch 333 is an unclosed ring, the third conductive branch 333 is connected to the side of the first conductive branch 331 or the second conductive branch 332 facing away from the feed line 32, and a partial structure of the first conductive branch 331 or the second conductive branch 332 closes the third conductive branch 333.

[0102] Combined with Figure 3 As shown, in some embodiments, the third conductive branch 333 is an unclosed rectangular ring. The third conductive branch 333 is connected to the side of the first conductive branch 331 or the second conductive branch 332 facing away from the feed line 32, and a partial structure of the first conductive branch 331 or the second conductive branch 332 serves as the unclosed side in the third conductive branch 333 to close the third conductive branch 333. This filtering structure 33 has a simple structure, is easy to process and package, and is beneficial to ensuring that the widths of the first conductive branch 331, the second conductive branch 332, and the third conductive branch 333 are the same, and improving the regulation accuracy of the gain zero point.

[0103] Combined with Figure 2 As shown, in some embodiments, the size of the conductive patch 311 along the first direction a is L11, and the size of the conductive patch 311 along the second direction b is W1, where the value range of L11 / W1 is 1 - 2; wherein, the first direction a is the extending direction of the feed line 32, and the second direction b is perpendicular to the first direction a. Thus, the filtering antenna in this embodiment can achieve the circular polarization radiation characteristics of wide bandwidth, low profile, and good directivity, and can cover the working frequency band of 26.10 GHz - 34.78 GHz.

[0104] Exemplarily, the value of L11 / W1 is, for example, 1.1, 1.2, 1.3, 1.4, 1.5, 1.6, 1.7, 1.8, 1.9, 2, etc. Optionally, the value of L11 / W1 is approximately 1.6.

[0105] In some possible implementation manners, the value of the dimension L11 of the conductive patch 311 along the first direction a is, for example, 1.0 mm, 1.1 mm, 1.2 mm, 1.3 mm, 1.4 mm, 1.5 mm, 1.6 mm, 1.7 mm, 1.8 mm, 1.9 mm, 2.0 mm, etc. Exemplarily, the value of L11 is 1.6 mm.

[0106] In some other possible implementation manners, the value of the dimension W1 of the conductive patch 311 along the second direction b is, for example, 0.5 mm, 0.6 mm, 0.7 mm, 0.8 mm, 0.9 mm, 1.0 mm, 1.1 mm, 1.2 mm, 1.3 mm, 1.4 mm, 1.5 mm, etc. Exemplarily, the value of W1 is 1.0 mm.

[0107] Combined with Figure 2 As shown, the width of the feed line 32 is W2, and the widths of the first conductive branch 331 and the second conductive branch 332 are both W3, where the value range of W1 / W3 is 2 - 3; when the widths of the feed line 32, the first conductive branch 331, and the second conductive branch 332 satisfy the above value range, the filtering structure 33 can construct gain zeros at the upstream and downstream of the target frequency band (5G frequency band) respectively, achieving a good filtering effect.

[0108] Exemplarily, the value of W1 / W3 is, for example, 2, 2.1, 2.2, 2.3, 2.4, 2.5, 2.6, 2.7, 2.8, 2.9, 3, etc. Optionally, the value of W1 / W3 is approximately 2.5.

[0109] In some possible implementation manners, the value of the width W2 of the feed line 32 is, for example, 0.16 mm, 0.17 mm, 0.18 mm, 0.19 mm, 0.2 mm, 0.21 mm, 0.22 mm, 0.23 mm, 0.24 mm, 0.25 mm, 0.26 mm, 0.27 mm, 0.28 mm, etc. Exemplarily, the value of W2 is 0.2 mm.

[0110] In some other possible implementation manners, the value of the width W3 of the first conductive branch 331 and the second conductive branch 332 is, for example, 0.04 mm, 0.05 mm, 0.06 mm, 0.07 mm, 0.08 mm, 0.09 mm, 0.10 mm, 0.11 mm, 0.12 mm, 0.13 mm, 0.14 mm, etc. Exemplarily, the value of W3 is 0.08 mm.

[0111] Combined with Figure 2 As shown, the distance W4 between the first conductive branch 331 or the second conductive branch 332 and the feeder line 32 ranges from 0.08 to 0.16 mm; when the distance between the conductive branch and the feeder line 32 satisfies the above range, the filtering effect of the filtering structure 33 is better.

[0112] Exemplarily, the value of the distance W4, for example, is 0.08 mm, 0.09 mm, 0.10 mm, 0.11 mm, 0.12 mm, 0.13 mm, 0.14 mm, 0.15 mm, 0.16 mm, etc. Optionally, the value of the distance W4 is 0.12 mm.

[0113] Combined with Figure 2 As shown, in some embodiments, the extension length of the filtering structure 33 in the first direction a is L12, and the overlapping length of the projection of the filtering structure 33 and the feeder line 32 in the first direction a is L13, where the value range of L13 / L12 is 0.75 - 0.95. When the lengths of the filtering structure 33 and the feeder line 32 in the first direction a satisfy the above range, the filtering structure 33 can construct gain zeros at the upstream and downstream of the target frequency band (5G frequency band) respectively, achieving a better filtering effect.

[0114] Exemplarily, the value of L13 / L12, for example, is 0.75, 0.77, 0.80, 0.82, 0.85, 0.87, 0.9, 0.92, 0.95, etc. Optionally, the value of L13 / L12 is approximately 0.85.

[0115] In some possible implementation manners, the value of the extension length L12 of the filtering structure 33 in the first direction a, for example, is 1.0 mm, 1.2 mm, 1.4 mm, 1.6 mm, 1.8 mm, 2.0 mm, 2.2 mm, 2.4 mm, 2.6 mm, 2.8 mm, 3.0 mm, etc. Optionally, the value of L12 is 2.0 mm.

[0116] In some other possible implementation manners, the value of the overlapping length L13 of the projection of the filtering structure 33 and the feeder line 32 in the first direction a, for example, is 1.0 mm, 1.1 mm, 1.2 mm, 1.3 mm, 1.4 mm, 1.5 mm, 1.6 mm, 1.7 mm, 2.0 mm, 2.2 mm, 2.5 mm, etc. Optionally, the value of L13 is 1.7 mm.

[0117] Combined with Figure 5As shown, in some embodiments, the first slot 21 is rectangular, and a first perturbation sheet 211 and a second perturbation sheet 212 are provided in the first slot 21. Both the first perturbation sheet 211 and the second perturbation sheet 212 are rectangular, and their areas are different;

[0118] The first perturbation sheet 211 and the second perturbation sheet 212 are respectively arranged at two of the four opposite corners of the first slot 21, and are respectively electrically connected to the first conductor layer 2.

[0119] In this embodiment, the first slot 21 is designed to be rectangular, and the first perturbation sheet 211 and the second perturbation sheet 212 arranged at two opposite corners of the first slot 21 make the first slot 21 have an asymmetric characteristic, so as to realize electromagnetic perturbation.

[0120] Compared with other shapes, the rectangular design and processing of the first slot 21 are simpler, which is beneficial to reducing the design and processing difficulty of the filtering antenna. Through experimental verification, the rectangular first slot 21 has a higher center operating frequency, a higher bandwidth, and a better out-of-band rejection level.

[0121] In some possible implementation manners, each of the first perturbation sheet 211 and the second perturbation sheet 212 can be formed by a reserved part after removing material from the first conductor layer 2, or can be formed by assembling an external material.

[0122] Using the first perturbation sheet 211 and the second perturbation sheet 212 that are rectangular and have different areas can make the first slot 21 have an asymmetric characteristic, so as to be able to radiate circularly polarized electromagnetic waves outward, and have a larger bandwidth and a better out-of-band rejection level.

[0123] In some embodiments, the area of the first slot 21 is S0, the area of the first perturbation sheet 211 is S1, the area of the second perturbation sheet 212 is S2, and the area of the second slot 22 is S3.

[0124] Among them, the quality factor Q of the filtering antenna is inversely proportional to the sum of the areas S1 + S2 + S3 of the first perturbation sheet 211, the second perturbation sheet 212, and the second slot 22; the quality factor Q of the filtering antenna is directly proportional to the area S0 of the first slot 21.

[0125] Exemplarily, this embodiment satisfies:

[0126]

[0127] In the above formula, Q is the quality factor of the filtering antenna. The quality factor is specifically a parameter for measuring the loss of the resonant circuit, and δ is a correction factor. Among them, the value range of δ is 1.8 - 2.2.

[0128] When the first slot 21 and the second slot 22 satisfy the above formula, it can be ensured that the amplitudes of the electric field components generated by the first perturbation piece 211 and the second perturbation piece 212 are the same, and the phase difference is 90 degrees, so that the first slot 21 can radiate circularly polarized electromagnetic waves outward.

[0129] Combined with Figure 5 As shown, in some embodiments, the size of the first slot 21 in the first direction a is L1, and the size of the first slot 21 in the second direction b is L2; the size of the first perturbation piece 211 in the first direction a is L3, and the size of the first perturbation piece 211 in the second direction b is L4; the size of the second perturbation piece 212 in the first direction a is L5, and the size of the second perturbation piece 212 in the second direction b is L6.

[0130] It satisfies that the value range of L3 / L1 is 0.5 - 0.7, and the value range of L4 / L2 is 0.1 - 0.3; the value range of L5 / L1 is 0.15 - 0.35, and the value range of L6 / L2 is 0.2 - 0.4.

[0131] Wherein, the first direction a is the extending direction of the feeder line 3232, and the second direction b is perpendicular to the first direction a.

[0132] When the sizes of the first slot 21, the first perturbation piece 211 and the second perturbation piece 212 satisfy the above value ranges, the filtering antenna of this embodiment can achieve circularly polarized radiation characteristics with wide bandwidth, low profile and good directivity, and can cover the operating frequency band of 26.10 GHz - 34.78 GHz.

[0133] Exemplarily, the value of L3 / L1, for example, is 0.5, 0.55, 0.6, 0.65, 0.67, 0.7, etc. Optionally, the value of L3 / L1 is about 0.67.

[0134] Another exemplarily, the value of L4 / L2, for example, is 0.1, 0.15, 0.2, 0.25, 0.3, etc. Optionally, the value of L4 / L2 is about 0.2.

[0135] Another exemplarily, the value of L5 / L1, for example, is 0.15, 0.2, 0.25, 0.3, 0.35, etc. Optionally, the value of L5 / L1 is about 0.25.

[0136] Another exemplarily, the value of L6 / L2, for example, is 0.2, 0.25, 0.3, 0.35, 0.4, etc. Optionally, the value of L6 / L2 is about 0.3.

[0137] In some possible implementation manners, the size L1 of the first slit 21 along the first direction a is 4 mm - 8 mm. Exemplarily, the value of the size L1, for example, is 4 mm, 5 mm, 6 mm, 7 mm, 8 mm, and so on. Optionally, the size L1 = 6 mm.

[0138] The size L2 of the first slit 21 along the second direction b is 4 mm - 8 mm. Exemplarily, the value of the size L2, for example, is 4 mm, 5 mm, 6 mm, 7 mm, 8 mm, and so on. Optionally, the size L2 = 6 mm.

[0139] In some possible implementation manners, the size L3 of the first perturbation piece 211 along the first direction a is 2 mm - 6 mm. Exemplarily, the value of the size L3, for example, is 2 mm, 3 mm, 4 mm, 5 mm, 6 mm, and so on. Optionally, the size L3 = 4 mm.

[0140] The size L4 of the first perturbation piece 211 along the second direction b is 0.2 mm - 2.2 mm. Exemplarily, the value of the size L4, for example, is 0.2 mm, 0.4 mm, 0.6 mm, 0.8 mm, 1 mm, 1.2 mm, 1.4 mm, 1.6 mm, 1.8 mm, 2 mm, 2.2 mm, and so on. Optionally, the size L4 = 1.2 mm.

[0141] In some possible implementation manners, the size L5 of the second perturbation piece 212 along the first direction a is 0.5 mm - 2.5 mm. Exemplarily, the value of the size L5, for example, is 0.5 mm, 1 mm, 1.5 mm, 2 mm, 2.5 mm, and so on. Optionally, the size L5 = 1.5 mm.

[0142] The size L6 of the second perturbation piece 212 along the second direction b is 0.8 mm - 2.8 mm. Exemplarily, the value of the size L6, for example, is 0.8 mm, 1 mm, 1.2 mm, 1.4 mm, 1.6 mm, 1.8 mm, 2 mm, 2.2 mm, 2.4 mm, 2.6 mm, 2.8 mm, and so on. Optionally, the size L6 = 1.8 mm.

[0143] In some embodiments, the first perturbation piece 211 and the second perturbation piece 212 satisfy that the value range of L3 / L5 is 2 - 3, and the value range of L4 / L6 is 0.5 - 1.5. Thus, the filtering antenna of this embodiment can achieve the circular polarization radiation characteristics of wide bandwidth, low profile, and good directivity, and can cover the operating frequency band of 26.10 GHz - 34.78 GHz.

[0144] Exemplarily, the value of L3 / L5, for example, is 2, 2.2, 2.4, 2.6, 2.67, 2.8, 3, and so on. Optionally, the value of L3 / L5 is approximately 2.67.

[0145] Exemplarily, the value of L4 / L6, for example, is 0.5, 0.55, 0.6, 0.65, 0.67, 0.7, etc. Optionally, the value of L4 / L6 is approximately 0.67.

[0146] Combined with Figure 5 As shown, in some embodiments, the size of the first slit 21 in the first direction a is L1, and the size of the first slit 21 in the second direction b is L2; the size of the first conductor layer 2 in the first direction a is L7, and the size of the first conductor layer 2 in the second direction b is L8.

[0147] It satisfies that the value range of L1 / L7 is 0.23 - 0.43, and the value range of L2 / L8 is 0.15 - 0.25.

[0148] Wherein, the first direction a is the extending direction of the feeder line 3232, and the second direction b is perpendicular to the first direction a.

[0149] When the sizes of the first slit 21, the first perturbation piece 211, and the second perturbation piece 212 satisfy the above value ranges, the filtering antenna of this embodiment can achieve circularly polarized radiation characteristics with wide bandwidth, low profile, and good directivity, and can cover the operating frequency band of 26.10 GHz - 34.78 GHz.

[0150] Exemplarily, the value of L1 / L7, for example, is 0.23, 0.25, 0.27, 0.3, 0.33, 0.35, 0.4, 0.43, etc. Optionally, the value of L1 / L7 is 0.23 - 0.43.

[0151] Exemplarily, the value of L2 / L8, for example, is 0.15, 0.17, 0.2, 0.22, 0.25, etc. Optionally, the value of L2 / L8 is approximately 0.2.

[0152] In some possible implementation manners, the size L7 of the first conductor layer 2 in the first direction a is 10 mm - 20 mm. Exemplarily, the value of the size L7, for example, is 10 mm, 12 mm, 14 mm, 15 mm, 16 mm, 18 mm, 20 mm, etc. Optionally, the size L7 = 15 mm.

[0153] The size L8 of the first conductor layer 2 in the second direction b is 6 mm - 18 mm. Exemplarily, the value of the size L8, for example, is 6 mm, 8 mm, 10 mm, 12 mm, 14 mm, 15 mm, 16 mm, 18 mm, etc. Optionally, the size L8 = 12 mm.

[0154] Combined with Figure 7As shown, in some embodiments, the size of the second slot 22 in the first direction a is L9, and the size of the second slot 22 in the second direction b is L10; it satisfies that the value range of (L9 + L10) is 2.4 mm - 4.4 mm. Thus, the filtering antenna of this embodiment can achieve a circular polarization radiation characteristic with a wide bandwidth, low profile, and good directivity, and can cover the operating frequency band of 26.10 GHz - 34.78 GHz.

[0155] Exemplarily, the shape of the second slot 22 is L-shaped. The size L9 of the second slot 22 in the first direction a = 0.7 mm - 2.1 mm. Exemplarily, 0.7 mm, 0.8 mm, 1 mm, 1.2 mm, 1.4 mm, 1.6 mm, 1.8 mm, 2 mm, 2.1 mm, etc. Optionally, the size L9 = 1.4 mm.

[0156] The size L10 of the second slot 22 in the second direction b = 1 mm - 3 mm. Exemplarily, the value of the size L10, for example, is 1 mm, 1.2 mm, 1.4 mm, 1.5 mm, 1.6 mm, 1.8 mm, 2.0 mm, 2.2 mm, 2.4 mm, 2.5 mm, 2.6 mm, 2.8 mm, 3.0 mm, etc. Optionally, the size L7 = 2 mm.

[0157] Another exemplarily, the value range of the width D of the second slot 22 is 0.25 mm - 1.25 mm. Exemplarily, the value of the width D, for example, is 0.25 mm, 0.5 mm, 0.75 mm, 1 mm, 1.25 mm, etc. Optionally, the width D = 0.75 mm.

[0158] Combined with Figure 1 、 6 As shown, in some embodiments, the filtering antenna further includes a periodic structure layer 4 and a second dielectric layer 5. The second dielectric layer 5 is located on the side of the feeding layer 3 away from the first dielectric layer 1, and the periodic structure layer 4 is located on the side of the second dielectric layer 5 away from the feeding layer 3.

[0159] Among them, the second dielectric layer 5 is used to isolate the structures on both sides to avoid mutual interference between the structures on both sides. The periodic structure layer 4 can construct an electromagnetic band gap (EBG) structure at the bottom of the filter antenna to form a perfect magnetic conductor layer (PMC), which can effectively suppress plane waves, reduce spatial radiation losses, and solve the problem of spatial resonance. Since the electromagnetic band gap can "tune out" a specific frequency, it can suppress unnecessary electromagnetic interference (EMI) and improve electromagnetic compatibility (EMC).

[0160] In some possible implementations, the second dielectric layer 55 is made of Rogers 5880 dielectric material with a dielectric constant of 2.2, a loss tangent of 0.0009, and a thickness of 0.254 mm. Its main function is to separate the bottom layer and the top layer so that they do not interfere with each other.

[0161] Combination Figure 6 As shown, in some embodiments, the periodic structure layer 4 includes a patch array layer 41, a third dielectric layer 42 and a second conductor layer 43 which are stacked.

[0162] The patch array layer 41 is located on the side of the third dielectric layer 42 facing the second dielectric layer 5, and the second conductor layer 43 is located on the side of the third dielectric layer 42 facing away from the second dielectric layer 5; each patch unit in the patch array layer 41 penetrates the third dielectric layer 42 along the stacking direction through a metal via 44 to be electrically connected to the second conductor layer 43.

[0163] The patch array layer 41 is composed of multiple patch units distributed in a periodic array, and each patch unit is electrically connected to the second conductor layer 43 through a metal via 44, thereby forming an electromagnetic bandgap array structure, which can serve as a virtual ground plane of the filtering antenna, reflect the radiation energy outward, and effectively curb the formation of surface waves, reduce the loss of radiation energy, and improve the radiation efficiency of the radiator.

[0164] In some possible implementations, the planar shape of the patch unit includes but is not limited to a circle, a rectangle, a positive direction, a triangle, an ellipse, and the like.

[0165] Exemplarily, the planar shape of the patch unit is circular, and the diameter W of the patch unit has a value range of 0.7 mm-2.7 mm. Specifically, the diameter W of the patch unit has a value of, for example, 0.7 mm, 0.9 mm, 1 mm, 1.2 mm, 1.5 mm, 1.7 mm, 1.9 mm, 2 mm, 2.7 mm, etc. Further, the diameter W of the patch unit is 1.7 mm.

[0166] In some other possible implementation manners, the value range of the center spacing P between adjacent patch units is 1.2 mm - 3.2 mm. Specifically, the value of the center spacing P between adjacent patch units, for example, is 1.2 mm, 1.5 mm, 1.7 mm, 1.9 mm, 2 mm, 2.2 mm, 2.5 mm, 2.7 mm, 3 mm, 3.2 mm, and so on. Further, the center spacing P between adjacent patch units = 2.2 mm.

[0167] In some other possible implementation manners, the value range of the radius r of the metal via 44 is 0.25 mm - 0.45 mm. Specifically, the value of the radius r of the metal via 44, for example, is 0.25 mm, 0.3 mm, 0.35 mm, 0.4 mm, 0.45 mm, and so on. Further, the radius r of the metal via 44 = 0.35 mm.

[0168] In some other embodiments, the third dielectric layer 42 uses Rogers 5880 dielectric material with a dielectric constant of 2.2, a tangent of loss angle of 0.0009, and a thickness of 0.787 mm. The main function is to provide a high-impedance surface to prohibit the propagation of surface waves.

[0169] The overall size of the filtering antenna provided by this application is 15 mm * 12 mm * 1.549 mm. Compared with traditional filtering antennas, it has a simpler structure and smaller size, and is more suitable for the miniaturization and small-size scenarios of electronic devices.

[0170] Combined with Figure 7 As shown, the return loss, axial ratio, and gain diagrams of the filtering antenna provided by this application. The center operating frequency of this filtering antenna is 30.4 GHz, the -10 dB impedance bandwidth is 26.10 GHz - 34.78 GHz (relative bandwidth is 28.6%), the 3 dB axial ratio bandwidth is 27.94 GHz - 30.97 GHz (relative axial ratio bandwidth is 10%), and the gain is approximately 6.36 dBi at 31 GHz.

[0171] The above shows that the filtering antenna provided by this application performs well in terms of bandwidth, axial ratio, and gain, is superior to the related technical level, and can be applied to 5G millimeter-wave wireless communication systems.

[0172] On the other hand, this embodiment provides an electronic device, and the electronic device includes the filtering antenna of this application.

[0173] The electronic device of this embodiment uses the filtering antenna of this application and has all the beneficial technical effects of all embodiments herein.

[0174] It should be noted that the "several" and "at least one" mentioned in this article refer to one or more, and "multiple" and "at least two" refer to two or more. The "and / or" describes the association relationship of associated objects and indicates that there can be three relationships. For example, A and / or B can represent three situations: A exists alone, A and B exist simultaneously, and B exists alone. The character " / " generally represents an "or" relationship between the associated objects before and after.

[0175] In addition, the terms "first" and "second" are only used for descriptive purposes and should not be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more features. In the description of this application, "multiple" means two or more unless otherwise specifically defined.

[0176] In the description of this specification, the description with reference to the terms "certain embodiments", "one embodiment", "some embodiments", "schematic embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials, or characteristics described in connection with the embodiments or examples are included in at least one embodiment or example of this application.

[0177] The above are only the embodiments of this application and are not intended to limit this application. Any modifications, equivalent replacements, improvements, etc. made within the principles of this application shall be included in the protection scope of this application.

Claims

1. A filtering antenna, characterized in that, The filtering antenna includes: a first dielectric layer (1), a first conductor layer (2), and a feeding layer (3); The first conductor layer (2) and the feeding layer (3) are respectively located on the upper and lower surfaces of the first dielectric layer (1); The first conductor layer (2) includes a first slot (21) and a second slot (22). The first slot (21) is located in the middle of the first conductor layer (2), and the first slot (21) is of an asymmetric structure. The second slot (22) is located between the first slot (21) and the first edge (11) of the first dielectric layer (1); The feeding layer (3) includes an excitation port (31), a filtering structure (33), and a feeding wire (32); The excitation port (31) is located at the first edge (11). The filtering structure (33) is electrically connected to the excitation port (31). One end of the feeding wire (32) is electrically connected to the filtering structure (33), and the other end of the feeding wire (32) extends into the corresponding area of the first slot (21).

2. The filtering antenna according to claim 1, characterized in that The excitation port (31) includes a conductive patch (311) extending inwards along the first edge (11); The filtering structure (33) includes a first conductive branch (331) and a second conductive branch (332). The first conductive branch (331) and the second conductive branch (332) are respectively electrically connected to the conductive patch (311); The first conductive branch (331) and the second conductive branch (332) are arranged at intervals. The end of the feeding wire (32) is located between the first conductive branch (331) and the second conductive branch (332), and the feeding wire (32) is not in electrical contact with any one of the first conductive branch (331), the second conductive branch (332), and the conductive patch (311).

3. The filtering antenna according to claim 2, characterized in that, The first conductive branch (331) and the second conductive branch (332) are arranged in parallel at intervals on both sides of the feeding wire (32).

4. The filtering antenna according to claim 2 or 3, characterized in that The shapes of the first conductive branch (331) and the second conductive branch (332) are symmetric or asymmetric along the feeding wire (32).

5. The filtering antenna according to claim 2 or 3, characterized in that, The filtering structure (33) further includes a third conductive branch (333). The third conductive branch (333) is located at the end of the first conductive branch (331) or the second conductive branch (332) facing the middle of the first dielectric layer (1). The third conductive branch (333) is used to construct at least one closed conductive loop at the end of the first conductive branch (331) or the second conductive branch (332).

6. The filtering antenna according to claim 5, characterized in that, The third conductive branch (333) is in a closed ring shape or a non-closed ring shape; When the third conductive branch (333) is in a closed ring shape, the third conductive branch (333) is electrically connected to the end of the first conductive branch (331) or the second conductive branch (332); When the third conductive branch (333) is a non-closed loop, the third conductive branch (333) is connected to a side of the first conductive branch (331) or the second conductive branch (332) facing away from the feed line (32), and a partial structure of the first conductive branch (331) or the second conductive branch (332) closes the third conductive branch (333).

7. The filtering antenna according to claim 5, wherein The third conductive branch (333) is a non-closed rectangular loop. The third conductive branch (333) is connected to a side of the first conductive branch (331) or the second conductive branch (332) facing away from the feed line (32). A partial structure of the first conductive branch (331) or the second conductive branch (332) serves as the unclosed side of the third conductive branch (333) to close the third conductive branch (333).

8. The filtering antenna according to any one of claims 2 to 7, wherein The size of the conductive patch (311) in the first direction is L11, and the size of the conductive patch (311) in the second direction is W1, where the value range of L11 / W1 is 1 - 2; and / or The width of the feed line (32) is W2, and the widths of the first conductive branch (331) and the second conductive branch (332) are both W3, where the value range of W1 / W3 is 2 - 3; and / or The value range of the spacing W4 between the first conductive branch (331) or the second conductive branch (332) and the feed line (32) is 0.08 - 0.16 mm; Wherein, the first direction is the extending direction of the feed line (32), and the second direction is perpendicular to the first direction.

9. The filtering antenna according to any one of claims 2 to 7, characterized in that, The extending length of the filtering structure (33) in the first direction is L12, and the overlapping length of the filtering structure (33) and the projection of the feed line (32) in the first direction is L13, where the value range of L13 / L12 is 0.75 - 0.

95.

10. The filtering antenna according to any one of claims 1 to 9, characterized in that, The first slot (21) is rectangular. A first perturbation piece (211) and a second perturbation piece (212) are arranged in the first slot (21). Both the first perturbation piece (211) and the second perturbation piece (212) are rectangular and have different areas; The first perturbation piece (211) and the second perturbation piece (212) are respectively arranged at two of the four opposite corners of the first slot (21) and are respectively electrically connected to the first conductor layer (2).

11. The filtering antenna according to claim 10, characterized in that, The area of the first slot (21) is S0, the area of the first perturbation piece (211) is S1, the area of the second perturbation piece (212) is S2, and the area of the second slot (22) is S3; Wherein, the quality factor Q of the filtering antenna is inversely proportional to the sum of the areas S1 + S2 + S3 of the first perturbation piece (211), the second perturbation piece (212), and the second slot (22); The quality factor Q of the filtering antenna is directly proportional to the area S0 of the first slot (21).

12. The filtering antenna according to any one of claims 1 to 11, characterized in that, The filtering antenna further includes a periodic structure layer (4) and a second dielectric layer (5). The second dielectric layer (5) is located on a side of the feeding layer (3) away from the first dielectric layer (1), and the periodic structure layer (4) is located on a side of the second dielectric layer (5) away from the feeding layer (3).

13. The filtering antenna according to claim 12, characterized in that, The periodic structure layer (4) includes a patch array layer (41), a third dielectric layer (42), and a second conductor layer (43) which are arranged in a stacked manner; The patch array layer (41) is located on a side of the third dielectric layer (42) facing the second dielectric layer (5), and the second conductor layer (43) is located on a side of the third dielectric layer (42) away from the second dielectric layer (5); Each patch unit in the patch array layer (41) penetrates through the third dielectric layer (42) along the stacking direction through a metal via (44) to electrically connect to the second conductor layer (43).

14. An electronic device, characterized in that, The electronic device includes the filtering antenna according to any one of claims 1 to 13.

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