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, and a first conductor layer and a feed structure which are respectively arranged on two sides of the first dielectric layer. The first conductor layer is provided with a first gap and a second gap, the first gap is located in the middle of the first conductor layer, and the first gap is of an asymmetric structure; the feed structure comprises an excitation port and a feeder line, the excitation port is located at the first edge of the first dielectric layer, one end of the feeder line is electrically connected with the excitation port, and the other end of the feeder line extends into an area corresponding to the first gap; the second gap is located between the first gap and the first edge. According to the filtering antenna disclosed by the invention, the circularly polarized radiation characteristic is realized, and the working frequency band of 26.10 GHz to 34.78 GHz can be covered.

Description

Technical Field

[0001] The present disclosure relates to the field of antenna technology, and in particular to a filtering antenna and electronic equipment. Background Art

[0002] With the rapid development of millimeter wave communication technology, the wireless communication modules of electronic devices are developing towards miniaturization, high integration and high efficiency. For the important components of wireless communication modules: antennas and filters, in order to achieve better integration and miniaturization, antennas and filters are integrated into one module - filtering antenna (filtenna).

[0003] In related technologies, the design of filtering antennas usually focuses on linear polarization antennas, while circular polarization antennas with better directivity and higher energy utilization are difficult to achieve. The reason is that circular polarization antennas have narrow bandwidth, complex structure, and difficulty in integration. Summary of the invention

[0004] The present disclosure provides a filtering antenna and electronic equipment, which can solve the problem that a circularly polarized antenna cannot be integrated with a filter to realize a filtering antenna.

[0005] The technical solution is as follows:

[0006] In one aspect, a filtering antenna is provided, the filtering antenna comprising: a first dielectric layer, and a first conductor layer and a feeding structure respectively arranged on two sides of the first dielectric layer;

[0007] The first conductor layer is provided with a first gap and a second gap, the first gap is located in the middle of the first conductor layer, and the first gap is an asymmetric structure;

[0008] The feeding structure comprises an excitation port and a feeding line, wherein the excitation port is located at a first edge of the first dielectric layer, one end of the feeding line is electrically connected to the excitation port, and the other end of the feeding line extends to a region corresponding to the first gap;

[0009] The second gap is located between the first gap and the first edge.

[0010] In some embodiments, the first slit is rectangular, and a first disturbance piece and a second disturbance piece are provided in the first slit;

[0011] The first agitator plate and the second agitator plate are respectively arranged at two of the four opposite corners of the first gap, and are respectively electrically connected to the first conductor layer.

[0012] In some embodiments, the first disturbance piece and the second disturbance piece are respectively rectangular and have different areas.

[0013] In some embodiments, the area of ​​the first gap is S0, the area of ​​the first disturbance piece is S1, the area of ​​the second disturbance piece is S2, and the area of ​​the second gap is S3;

[0014] The quality factor Q of the filtering antenna is inversely proportional to the sum of the areas of the first disturbance piece, the second disturbance piece and the second gap S1+S2+S3;

[0015] The quality factor Q of the filtering antenna is proportional to the area S0 of the first slot.

[0016] In some embodiments, the size of the first gap along the first direction is L1, and the size of the first gap along the second direction is L2;

[0017] The size of the first disturbance piece along the first direction is L3, and the size of the first disturbance piece along the second direction is L4;

[0018] The size of the second disturbance piece along the first direction is L5, and the size of the second disturbance piece along the second direction is L6;

[0019] The value range of L3 / L1 is 0.5-0.7, 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;

[0020] The first direction is the extension direction of the feeder line, and the second direction is perpendicular to the first direction.

[0021] In some embodiments, the first disturbance plate and the second disturbance plate satisfy that the value range of L3 / L5 is 2-3, and the value range of L4 / L6 is 0.5-0.7.

[0022] In some embodiments, the size of the first gap along the first direction is L1, and the size of the first gap along the second direction is L2;

[0023] The dimension of the first conductor layer along the first direction is L7, and the dimension of the first conductor layer along the second direction is L8;

[0024] Satisfied, the value range of L1 / L7 is 0.23-0.43, and the value range of L2 / L8 is 0.15-0.25;

[0025] The first direction is the extension direction of the feeder line, and the second direction is perpendicular to the first direction.

[0026] In some embodiments, the size of the second gap along the first direction is L9, and the size of the second gap along the second direction is L10;

[0027] The value range of L9+L10 is 2.4mm-4.4mm.

[0028] In some embodiments, the filtering antenna further includes a periodic structure layer and a second dielectric layer, the second dielectric layer is located on a side of the feeding structure away from the first dielectric layer, and the periodic structure layer is located on a side of the second dielectric layer away from the feeding structure.

[0029] 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;

[0030] The patch array layer is located on a side of the third dielectric layer facing the second dielectric layer, and the second conductor layer is located on a side of the third dielectric layer facing away from the second dielectric layer;

[0031] Each patch unit in the patch array layer penetrates the third dielectric layer along the stacking direction through a metal via to be electrically connected to the second conductor layer.

[0032] On the other hand, an electronic device is provided, comprising the filtering antenna described in the present disclosure.

[0033] The beneficial effects of the technical solution provided by the present disclosure include at least:

[0034] The filtering antenna disclosed in the present invention utilizes an asymmetric first slot and a second slot to achieve circularly polarized radiation characteristics with wide bandwidth, low profile, and good directivity, and can cover the operating frequency band of 26.10GHz-34.78GHz, so that the filtering antenna covers the 5G frequency band used by mobile phones and other electronic devices; in addition, the filtering antenna disclosed in the present invention has a simple structure, and based on processing, integration, and packaging, it solves the problem of complex structure of the filtering antenna. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] In order to more clearly illustrate the technical solutions in the embodiments of the present disclosure, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present disclosure. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0036] Figure 1 is a structural exploded diagram of a filtering antenna provided by an embodiment of the present disclosure;

[0037] Figure 2 is a schematic structural diagram of a first conductor layer provided in an embodiment of the present disclosure;

[0038] Figure 3 is a schematic structural diagram of a periodic structure layer provided by an embodiment of the present disclosure;

[0039] Figure 4 It is a performance test diagram of the filtering antenna provided in an embodiment of the present disclosure.

[0040] The reference numerals in the figures represent respectively:

[0041] 1. a first dielectric layer; 11. a first edge;

[0042] 2. first conductor layer; 21. first gap; 211. first disturbance plate; 212. second disturbance plate; 22. second gap;

[0043] 3. Feed structure; 31. Excitation port; 32. Feed line;

[0044] 4. Periodic structure layer; 41. Patch array layer; 42. Third dielectric layer; 43. Second conductor layer; 44. Metal vias;

[0045] 5. The second dielectric layer. DETAILED DESCRIPTION

[0046] Exemplary embodiments will be described in detail herein, examples of which are shown in the accompanying drawings. When the following description refers to the drawings, the same numbers in different drawings represent the same or similar elements unless otherwise indicated. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present disclosure. Instead, they are merely examples of devices and methods consistent with some aspects of the present disclosure as detailed in the appended claims.

[0047] In the description of the present disclosure, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate directions or positional relationships based on the attached Figure 1 The orientation or positional relationship shown is only for the convenience of describing the present disclosure and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore should not be understood as a limitation on the present disclosure.

[0048] Unless otherwise defined, all technical terms used in the embodiments of the present disclosure have the same meanings as commonly understood by those of ordinary skill in the art.

[0049] The wireless communication module mainly consists of three parts: antenna, RF front end, and main chip. It is used for the conversion between binary signals and radio electromagnetic wave signals during signal transmission and signal reception: converting binary signals into high-frequency radio electromagnetic wave signals during signal transmission; converting received electromagnetic wave signals into binary digital signals during signal reception. Among them, the filter is a key component in the RF front end.

[0050] The function of the antenna is to transmit and receive electromagnetic wave signals. The function of the filter is to select frequencies and filter out unwanted stray signals outside the band, 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. In order to achieve better integration and miniaturization, the antenna and filter are designed into a module - the filter antenna, which has received widespread attention in the industry.

[0051] Circularly polarized antennas can receive electromagnetic waves of any polarization direction, which can reduce the energy loss of signals due to polarization mismatch, so circularly polarized antennas are widely used in mobile phone navigation. However, most of the current designs for filter antennas focus on antennas with linear polarization performance, while the design of filter antennas with circular polarization performance is more difficult, making it impossible to realize many advantages of circular polarization in filter antennas.

[0052] Therefore, the present disclosure provides a filtering antenna that achieves wide bandwidth, low profile, and circularly polarized radiation characteristics with good directivity, and can cover the operating frequency band of 26.10GHz-34.78GHz, so that the filtering antenna covers the 5G frequency band used by mobile phones and other electronic devices.

[0053] The technical solution provided by the present disclosure is applicable to electronic devices that adopt one or more of the following communication technologies: Bluetooth (Blue Tooth, BT) communication technology, Global Positioning System (Global Positioning System, GPS) communication technology, Wireless Fidelity (Wireless Fidelity, WiFi) communication technology, Global System For mobile communications (Global System For mobile Communications, GSM) communication technology, Wideband Code Division Multiple Access (Wideband Code Division Multiple Access, WCDMA) communication technology, Long Term Evolution (Long Term Evolution, LTE) communication technology, 5G communication technology and other future communication technologies.

[0054] The electronic device in the embodiments of the present disclosure may be a mobile phone, a tablet computer, a laptop computer, a smart bracelet, a smart watch, a smart helmet, 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 device connected to a wireless modem, a vehicle-mounted device, an electronic device in a 5G network, or an electronic device in a future Public Land Mobile Network (PLMN), etc., and the embodiments of the present disclosure are not limited to this.

[0055] In order to make the objectives, technical solutions and advantages of the present disclosure more clear, the embodiments of the present disclosure will be further described in detail below with reference to the accompanying drawings.

[0056] On the one hand, combined with Figure 1 , 2 As shown, this embodiment provides a filtering antenna, which includes: a first dielectric layer 1 , and a first conductor layer 2 and a feeding structure 3 respectively arranged on two sides of the first dielectric layer 1 .

[0057] The first conductor layer 2 is provided with a first slit 21 and a second slit 22 . The first slit 21 is located in the middle of the first conductor layer 2 , and the first slit 21 is an asymmetric structure.

[0058] The feeding structure 3 includes an excitation port 31 and a feeding line 32. The excitation port 31 is located at the first edge 11 of the first dielectric layer 1. One end of the feeding line 32 is electrically connected to the excitation port 31, and the other end of the feeding line 32 extends to the area corresponding to the first gap 21. The second gap 22 is located between the first gap 21 and the first edge 11.

[0059] The filtering antenna of this embodiment utilizes an asymmetric first slot 21 and a second slot 22 to 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, so that the filtering antenna covers the 5G frequency band used by mobile phones and other electronic devices.

[0060] In addition, the filtering antenna disclosed in the present invention has a simple structure and solves the problem of complex structure of the filtering antenna based on processing, integration and packaging.

[0061] The first slot 21 and the second slot 22 in this embodiment can form a perturbation structure, and the perturbation structure can be used to enable the filter antenna to generate two electric field components with the same amplitude and a phase difference of 90°, thereby radiating circularly polarized electromagnetic waves. At the same time, the second slot 22 located between the first slot 21 and the excitation port 31 can introduce an additional resonance zero point to increase the impedance matching of the filter antenna of this embodiment.

[0062] It should be noted that, in this embodiment, the first gap 21 is an asymmetric structure, which means that the first gap 21 is neither an axisymmetric structure nor a point-symmetric structure.

[0063] In some possible implementations, the material of the first conductor layer 2 is metal copper.

[0064] Optionally, the surface of the first dielectric layer 1 is taken as a reference plane and filled with metal copper, so that the surface of the first dielectric layer 1 is evenly and completely covered with the metal copper.

[0065] Alternatively, the first conductor layer 2 is formed by laminating a copper foil to the surface of the first dielectric layer 1 .

[0066] In some other possible implementations, the feeding structure 3 is printed on the surface of the first dielectric layer 1 by using a printing process.

[0067] In some other possible implementations, the first dielectric layer 1 mainly functions as an antenna radiation layer and a filtering functional layer, and can optionally use Rogers 5880 dielectric material with a dielectric constant of 2.2, a loss tangent of 0.0009, and a thickness of 0.508 mm. Thus, the material can be processed and produced and stably applied, the electromagnetic loss is small, the material cost is low, and it is conducive to controlling the cost of the filtering antenna.

[0068] Exemplarily, the first gap 21 of the present embodiment is formed by combining basic shape features and additional shape features so that it has asymmetric characteristics, wherein the basic shape features include but are not limited to rectangle, circle, ellipse, triangle, L-shape, T-shape, U-shape, E-shape, etc., and the additional shape features also include but are not limited to rectangle, circle, ellipse, triangle, L-shape, T-shape, U-shape, E-shape, etc.

[0069] As another example, the shape of the second gap 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, and the like.

[0070] Combination Figure 1 , 2 As shown, in some embodiments, the first slit 21 is rectangular, and a first disturbance piece 211 and a second disturbance piece 212 are provided in the first slit 21 .

[0071] The first agitator 211 and the second agitator 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 .

[0072] In this embodiment, the first slot 21 is designed to be rectangular, and cooperates with the first disturbance piece 211 and the second disturbance piece 212 arranged in two opposite corners of the first slot 21, so that the first slot 21 has an asymmetric feature, thereby achieving electromagnetic disturbance.

[0073] Compared with other shapes, the rectangular first slot 21 is simpler to design and process, which is conducive to reducing the design and processing difficulty of the filter antenna. After experimental verification, the rectangular first slot 21 has a higher central operating frequency and a higher bandwidth, as well as a better out-of-band suppression level.

[0074] In some possible implementations, each of the first agitator 211 and the second agitator 212 may be formed by a reserved portion of the first conductor layer 2 after material removal, or may be formed by assembling with an external material.

[0075] Combination Figure 1 , 2 As shown, in some embodiments, the first agitator 211 and the second agitator 212 are respectively rectangular and have different areas.

[0076] By using the rectangular first disturbance piece 211 and the second disturbance piece 212 with different areas, the first slot 21 can have an asymmetric characteristic, so that circularly polarized electromagnetic waves can be radiated outward with a larger bandwidth and a better out-of-band suppression level.

[0077] In some embodiments, the area of ​​the first slot 21 is S0, the area of ​​the first disturbance piece 211 is S1, the area of ​​the second disturbance 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 disturbance piece 211, the second disturbance 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.

[0078] Exemplarily, this embodiment satisfies:

[0079]

[0080] In the above formula, Q is the quality factor of the filter antenna, which is a parameter for measuring the loss of the resonant circuit, and δ is a correction factor, where the value range of δ is 1.8-2.2.

[0081] When the first slot 21 and the second slot 22 satisfy the above formula, it can be ensured that the electric field components generated by the first agitator 211 and the second agitator 212 have the same amplitude and a 90-degree phase difference, so that the first slot 21 can radiate circularly polarized electromagnetic waves outward.

[0082] Combination Figure 2 As shown, in some embodiments, the size of the first gap 21 along the first direction a is L1, and the size of the first gap 21 along the second direction b is L2; ​​the size of the first disturbance piece 211 along the first direction a is L3, and the size of the first disturbance piece 211 along the second direction b is L4; the size of the second disturbance piece 212 along the first direction a is L5, and the size of the second disturbance piece 212 along the second direction b is L6.

[0083] The value range of L3 / L1 is 0.5-0.7, 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.

[0084] 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.

[0085] When the sizes of the first slot 21, the first disturbance plate 211 and the second disturbance plate 212 meet the above value range, 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 26.10GHz-34.78GHz.

[0086] Exemplarily, the value of L3 / L1 is, for example, 0.5, 0.55, 0.6, 0.65, 0.67, 0.7, etc. Optionally, the value of L3 / L1 is about 0.67.

[0087] In another exemplary embodiment, the value of L4 / L2 is, for example, 0.1, 0.15, 0.2, 0.25, 0.3, etc. Optionally, the value of L4 / L2 is approximately 0.2.

[0088] In another exemplary embodiment, the value of L5 / L1 is, for example, 0.15, 0.2, 0.25, 0.3, 0.35, etc. Optionally, the value of L5 / L1 is approximately 0.25.

[0089] In another exemplary embodiment, the value of L6 / L2 is, for example, 0.2, 0.25, 0.3, 0.35, 0.4, etc. Optionally, the value of L6 / L2 is about 0.3.

[0090] In some possible implementations, the dimension L1 of the first gap 21 along the first direction a is 4 mm-8 mm. Exemplarily, the value of the dimension L1 is, for example, 4 mm, 5 mm, 6 mm, 7 mm, 8 mm, etc. Optionally, the dimension L1 is 6 mm.

[0091] The dimension L2 of the first gap 21 along the second direction b is 4 mm-8 mm. Exemplarily, the value of the dimension L2 is, for example, 4 mm, 5 mm, 6 mm, 7 mm, 8 mm, etc. Optionally, the dimension L2 is 6 mm.

[0092] In some possible implementations, the dimension L3 of the first agitator 211 along the first direction a is 2 mm to 6 mm. For example, the dimension L3 is 2 mm, 3 mm, 4 mm, 5 mm, 6 mm, etc. Optionally, the dimension L3 is 4 mm.

[0093] The dimension L4 of the first disturbance piece 211 along the second direction b is 0.2 mm-2.2 mm. For example, the dimension L4 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, etc. Optionally, the dimension L4 is 1.2 mm.

[0094] In some possible implementations, the dimension L5 of the second agitator 212 along the first direction a is 0.5 mm-2.5 mm. For example, the dimension L5 is 0.5 mm, 1 mm, 1.5 mm, 2 mm, 2.5 mm, etc. Optionally, the dimension L5 is 1.5 mm.

[0095] The dimension L6 of the second disturbance piece 212 along the second direction b is 0.8 mm-2.8 mm. For example, the dimension L6 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, etc. Optionally, the dimension L6 is 1.8 mm.

[0096] In some embodiments, the first disturbance plate 211 and the second disturbance plate 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 circular polarization radiation characteristics with wide bandwidth, low profile and good directivity, and can cover the working frequency band of 26.10GHz-34.78GHz.

[0097] Exemplarily, the value of L3 / L5 is, for example, 2, 2.2, 2.4, 2.6, 2.67, 2.8, 3, etc. Optionally, the value of L3 / L5 is about 2.67.

[0098] In another exemplary embodiment, the value of L4 / L6 is, for example, 0.5, 0.55, 0.6, 0.65, 0.67, 0.7, etc. Optionally, the value of L4 / L6 is approximately 0.67.

[0099] Combination Figure 2 As shown, in some embodiments, the size of the first slit 21 along the first direction a is L1, and the size of the first slit 21 along the second direction b is L2; ​​the size of the first conductor layer 2 along the first direction a is L7, and the size of the first conductor layer 2 along the second direction b is L8.

[0100] The value range of L1 / L7 is 0.23-0.43, and the value range of L2 / L8 is 0.15-0.25.

[0101] 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.

[0102] When the sizes of the first slot 21, the first disturbance plate 211 and the second disturbance plate 212 meet the above value range, 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 26.10GHz-34.78GHz.

[0103] Exemplarily, the value of L1 / L7 is, for example, 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.

[0104] In another exemplary embodiment, the value of L2 / L8 is, for example, 0.15, 0.17, 0.2, 0.22, 0.25, etc. Optionally, the value of L2 / L8 is approximately 0.2.

[0105] In some possible implementations, the dimension L7 of the first conductor layer 2 along the first direction a is 10 mm-20 mm. Exemplarily, the dimension L7 is, for example, 10 mm, 12 mm, 14 mm, 15 mm, 16 mm, 18 mm, 20 mm, etc. Optionally, the dimension L7 is 15 mm.

[0106] The dimension L8 of the first conductor layer 2 along the second direction b is 6 mm-18 mm. Exemplarily, the value of the dimension L8 is, for example, 6 mm, 8 mm, 10 mm, 12 mm, 14 mm, 15 mm, 16 mm, 18 mm, etc. Optionally, the dimension L8 is 12 mm.

[0107] Combination Figure 2As shown, in some embodiments, the size of the second slot 22 along the first direction a is L9, and the size of the second slot 22 along the second direction b is L10; satisfying that the value range of (L9+L10) is 2.4mm-4.4mm. Thus, the filtering antenna of this embodiment can achieve circular polarization radiation characteristics with wide bandwidth, low profile and good directivity, and can cover the working frequency band of 26.10GHz-34.78GHz.

[0108] Exemplarily, the shape of the second slit 22 is L-shaped. The dimension L9 of the second slit 22 along the first direction a is 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 dimension L9 is 1.4 mm.

[0109] The dimension L10 of the second gap 22 along the second direction b is 1 mm-3 mm. For example, the dimension L10 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 dimension L7 is 2 mm.

[0110] In another exemplary embodiment, the width D of the second gap 22 is in the range of 0.25 mm to 1.25 mm. In another exemplary embodiment, the width D is, for example, 0.25 mm, 0.5 mm, 0.75 mm, 1 mm, 1.25 mm, etc. Optionally, the width D=0.75 mm.

[0111] Combination Figure 1 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 structure 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 structure 3 .

[0112] 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).

[0113] In some possible implementations, the second dielectric layer 5 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.

[0114] Combination Figure 3 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.

[0115] 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.

[0116] 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.

[0117] 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.

[0118] 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.

[0119] In some other possible implementations, the center spacing P between adjacent patch units ranges from 1.2 mm to 3.2 mm. Specifically, the center spacing P between adjacent patch units is, for example, 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, etc. Further, the center spacing P between adjacent patch units is 2.2 mm.

[0120] In some other possible implementations, the radius r of the metallized hole ranges from 0.25 mm to 0.45 mm. Specifically, the radius r of the metallized hole ranges from 0.25 mm to 0.45 mm. Specifically, the radius r of the metallized hole ranges from 0.25 mm to 0.3 mm, 0.35 mm, 0.4 mm, 0.45 mm, etc. Furthermore, the radius r of the metallized hole is 0.35 mm.

[0121] In other embodiments, the third dielectric layer 42 is made of Rogers 5880 dielectric material with a dielectric constant of 2.2, a loss tangent of 0.0009, and a thickness of 0.787 mm, and its main function is to provide a high impedance surface to prohibit surface wave propagation.

[0122] The overall size of the filtering antenna provided by the present invention is 15mm*12mm*1.549mm. Compared with the traditional filtering antenna, it has a simpler structure and smaller size, and is more suitable for the miniaturization and miniaturization scenarios of electronic devices.

[0123] Combination Figure 4 As shown, the return loss, axial ratio and gain diagrams of the filtering antenna provided by the present invention have a central operating frequency of 30.4 GHz, a -10 dB impedance bandwidth of 26.10 GHz-34.78 GHz (relative bandwidth of 28.6%), a 3 dB axial ratio bandwidth of 27.94 GHz-30.97 GHz (relative axial ratio bandwidth of 10%), and a gain of approximately 6.36 dBi at 31 GHz.

[0124] The above shows that the filtering antenna provided by the present invention performs well in terms of bandwidth, axial ratio, and gain, is superior to the relevant technical level, and can be applied to 5G millimeter wave wireless communication systems.

[0125] On the other hand, this embodiment provides an electronic device, and the electronic device includes the filtering antenna disclosed in the present invention.

[0126] The electronic device of this embodiment adopts the filtering antenna disclosed in the present invention and has all the beneficial technical effects of all the embodiments herein.

[0127] 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. "And / or" describes the association relationship of the associated objects, indicating that three relationships can exist. For example, A and / or B can mean: A exists alone, A and B exist at the same time, and B exists alone. The character " / " generally indicates that the associated objects before and after are in an "or" relationship.

[0128] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more features. In the description of the present disclosure, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0129] In the description of this specification, the description with reference to the terms "certain embodiments", "one embodiment", "some embodiments", "illustrative embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiments or examples are included in at least one embodiment or example of the present disclosure.

[0130] The above descriptions are merely embodiments of the present disclosure and are not intended to limit the present disclosure. Any modifications, equivalent substitutions, improvements, etc. made within the principles of the present disclosure shall be included in the protection scope of the present disclosure.

Claims

1. A filtering antenna, characterized in that: The filtering antenna comprises: a first dielectric layer (1), and a first conductor layer (2) and a feeding structure (3) respectively arranged on two sides of the first dielectric layer (1); The first conductor layer (2) is provided with a first slit (21) and a second slit (22), the first slit (21) is located in the middle of the first conductor layer (2), and the first slit (21) is an asymmetric structure; The feeding structure (3) comprises an excitation port (31) and a feeding line (32), wherein the excitation port (31) is located at a first edge (11) of the first dielectric layer (1), one end of the feeding line (32) is electrically connected to the excitation port (31), and the other end of the feeding line (32) extends to a region corresponding to the first gap (21); The second gap (22) is located between the first gap (21) and the first edge (11).

2. The filtering antenna according to claim 1, characterized in that: The first slit (21) is rectangular, and a first disturbance piece (211) and a second disturbance piece (212) are provided in the first slit (21); The first disturbance plate (211) and the second disturbance plate (212) are respectively arranged at two of the four opposite corners of the first gap (21), and are respectively electrically connected to the first conductor layer (2).

3. The filtering antenna according to claim 2, characterized in that: The first disturbance plate (211) and the second disturbance plate (212) are respectively rectangular and have different areas.

4. The filtering antenna according to claim 2, characterized in that: The area of ​​the first gap (21) is S0, the area of ​​the first disturbance plate (211) is S1, the area of ​​the second disturbance plate (212) is S2, and the area of ​​the second gap (22) is S3; The quality factor Q of the filtering antenna is inversely proportional to the sum of the areas S1+S2+S3 of the first disturbance piece (211), the second disturbance piece (212) and the second slot (22); The quality factor Q of the filtering antenna is proportional to the area S0 of the first slot (21).

5. The filtering antenna according to claim 2, characterized in that: The size of the first gap (21) along the first direction is L1, and the size of the first gap (21) along the second direction is L2; The size of the first disturbance piece (211) along the first direction is L3, and the size of the first disturbance piece (211) along the second direction is L4; The size of the second disturbance piece (212) along the first direction is L5, and the size of the second disturbance piece (212) along the second direction is L6; The value range of L3 / L1 is 0.5-0.7, 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; The first direction is the extension direction of the feeder line (32), and the second direction is perpendicular to the first direction.

6. The filtering antenna according to claim 5, characterized in that: The first disturbance plate (211) and the second disturbance plate (212) satisfy that the value range of L3 / L5 is 2-3, and the value range of L4 / L6 is 0.5-0.

7.

7. The filtering antenna according to any one of claims 1 to 6, characterized in that: The size of the first gap (21) along the first direction is L1, and the size of the first gap (21) along the second direction is L2; The dimension of the first conductor layer (2) along the first direction is L7, and the dimension of the first conductor layer (2) along the second direction is L8; Satisfied, the value range of L1 / L7 is 0.23-0.43, and the value range of L2 / L8 is 0.15-0.25; The first direction is the extension direction of the feeder line (32), and the second direction is perpendicular to the first direction.

8. The filtering antenna according to claim 7, characterized in that: The dimension of the second gap (22) along the first direction is L9, and the dimension of the second gap (22) along the second direction is L10; The value range of L9+L10 is 2.4mm-4.4mm.

9. The filtering antenna according to any one of claims 1 to 8, characterized in that: The filtering antenna further comprises a periodic structure layer (4) and a second dielectric layer (5), wherein the second dielectric layer (5) is located on a side of the feeding structure (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 structure (3).

10. The filtering antenna according to claim 9, characterized in that: The periodic structure layer (4) comprises a patch array layer (41), a third dielectric layer (42) and a second conductor layer (43) which are stacked; 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) 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).

11. An electronic device, characterized in that: The electronic device comprises the filtering antenna according to any one of claims 1-10.

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