A breakpoint-free metal frame flat panel antenna

Abstract

The embodiment of the application provides a breakpoint-free metal frame flat plate antenna, and relates to the technical field of flat plate antennas.The breakpoint-free metal frame flat plate antenna comprises a dielectric frame body, a metal frame, a metal ground plate, at least one parasitic branch and at least two feeders.The metal frame is a closed loop structure and is arranged around the dielectric frame body.The metal ground plate is arranged on the dielectric frame body and is electrically connected with the metal frame.A closed slot is formed in the metal ground plate.Each of the at least one parasitic branch is electrically connected with one of the at least two feeders.The other feeder is electrically connected with the metal ground plate and the metal frame or is electrically connected with the other parasitic branch.Each of the feeders is used for electrically connecting a feed source.The breakpoint-free metal frame flat plate antenna provided by the embodiment of the application solves the problem that in the related art, the overall structural strength of the metal frame is easily weakened and the use effect of the metal frame is affected in the scene of expanding the bandwidth of the flat plate antenna.

Description

Technical Field

[0001] This application relates to the field of flat panel antenna technology, and in particular to a flat panel antenna with a seamless metal frame. Background Technology

[0002] Flat panel antennas can be easily integrated into electronic devices such as mobile communication terminals, tablets, and laptops, achieving structural reuse with the device casing or frame. This satisfies the requirements for lightweight and integrated device design, while also enabling the transmission and reception of multi-band signals such as Wi-Fi, Bluetooth, and 5G.

[0003] In related technologies, a flat panel antenna includes a dielectric frame, a metal frame, a metal ground plane, and a feed port. The metal ground plane is disposed on the lower surface of the dielectric frame. The metal frame has a closed-loop structure and is wound around the dielectric frame and electrically connected to the metal ground plane. The feed port connects the metal ground plane and the metal frame, and also serves to electrically connect to the feed source. During operation, after the feed source is connected through the feed component, the radio frequency signal excites the metal frame, which is electrically connected to the metal ground plane, to resonate. The metal frame then acts as a radiator, radiating electromagnetic waves outward.

[0004] To extend the bandwidth of a flat panel antenna, breaks, slits, or windows are often added to the metal frame to provide a path for the antenna's radiation, thus expanding the bandwidth. However, this can weaken the overall structural strength of the metal frame, affecting its performance. Summary of the Invention

[0005] This application provides a seamless metal frame planar antenna to solve the problem in related technologies where the overall structural strength of the metal frame is easily weakened and the performance of the metal frame is affected when expanding the bandwidth of the planar antenna.

[0006] This application provides a seamless metal frame planar antenna, comprising:

[0007] Medium frame;

[0008] A metal frame, wherein the metal frame is a closed-loop structure and is wound around the medium frame;

[0009] A metal floor is disposed on the medium frame and electrically connected to the metal frame. A closed groove is formed on the metal floor.

[0010] At least one parasitic branch and at least two feeders, at least one of the feeders being electrically connected to one of the parasitic branches; at least another feeder being electrically connected to the metal floor and the metal frame, or electrically connected to the other parasitic branches; each of the feeders is used to electrically connect to a feed source.

[0011] In one possible implementation, at least one of the parasitic branches is a first parasitic branch, at least one of the power supply components is electrically connected to the first parasitic branch, and at least another power supply component is electrically connected to the metal floor and the metal frame.

[0012] In one possible implementation, the power supply component, which is electrically connected to the metal floor, is electrically connected to a portion of the metal floor corresponding to the edge of the closed groove.

[0013] In one possible implementation, at least one of the parasitic segments is a second parasitic segment, which is electrically connected to the metal floor and coupled to the edge of the closed groove.

[0014] In one possible implementation, at least two of the parasitic branches are designated as a third parasitic branch and a fourth parasitic branch, with the power supply component electrically connected to the third parasitic branch and at least one other power supply component electrically connected to the fourth parasitic branch.

[0015] In one possible implementation, at least one of the power supply components is electrically connected to the metal floor and the metal frame.

[0016] In one possible implementation, the power supply components are spaced apart.

[0017] In one possible implementation, each of the parasitic nodes is located inside the closed groove.

[0018] In one possible implementation, the media frame includes a central plate and a plurality of side plates, the side plates being connected to the edge of the central plate and the plurality of side plates being arranged around the central plate, and the metal floor being disposed on the lower surface of the central plate;

[0019] The metal frame includes multiple metal patches, which are respectively disposed on the outer surface of the side panel. The multiple metal patches are interconnected to form a closed loop structure, and at least one metal patch is electrically connected to the metal floor.

[0020] In one possible implementation, it further includes a power divider and at least two phase shifters, with the power supply corresponding to the power divider electrically connected via the phase shifters, and the power divider being used to electrically connect to the feed source.

[0021] This application provides a seamless metal-framed planar antenna, comprising: a dielectric frame; a metal frame, which is a closed-loop structure and is wound around the dielectric frame; a metal ground plane, which is disposed on the dielectric frame and electrically connected to the metal frame, and has a closed slot; at least one parasitic stub and at least two feed elements, at least one feed element being electrically connected to one of the parasitic stubs; at least another feed element being electrically connected to the metal ground plane and the metal frame, or electrically connected to other parasitic stubs; each feed element is used to electrically connect to a feed source. During operation, the feed source signal can be collaboratively excited by at least two feed elements (based on multi-feed technology) to one of the parasitic stubs and the closed-slot antenna (i.e., the metal frame and the metal ground plane with the closed slot) or other parasitic stubs, thereby forming a multi-mode composite operating state and effectively expanding the bandwidth of the planar antenna. Simultaneously, there is no need to set breakpoints or slots on the metal frame, thus minimizing the weakening of the overall structural strength of the metal frame and ensuring better performance. Therefore, while expanding the bandwidth of the flat panel antenna, the overall structural strength of the metal frame can be guaranteed at the same time. This solves the problem in related technologies where the overall structural strength of the metal frame is easily weakened and the performance of the metal frame is affected when expanding the bandwidth of the flat panel antenna. Attached Figure Description

[0022] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this application and, together with the description, serve to explain the principles of this application.

[0023] Figure 1 This is a schematic diagram of the structure of a seamless metal frame planar antenna provided in Embodiment 1 of this application;

[0024] Figure 2 This is a cross-sectional view of a flat panel antenna with a seamless metal frame provided in Embodiment 1 of this application;

[0025] Figure 3 S11 comparison diagram of single-fed excited closed slot antenna and multi-fed excited closed slot antenna and parasitic stub antenna in Embodiment 1 of this application;

[0026] Figure 4 A comparison diagram of the radiation efficiency of a single-fed excited closed slot antenna and a multi-fed excited closed slot antenna and a parasitic stub antenna in Embodiment 1 of this application;

[0027] Figure 5 A comparison diagram of the system efficiency of a single-fed excited closed slot antenna and a multi-fed excited closed slot antenna and a parasitic stub antenna in Embodiment 1 of this application;

[0028] Figure 6 This is a schematic diagram of the structure of a seamless metal frame planar antenna provided in Embodiment 2 of this application. Figure 1;

[0029] Figure 7 This is a schematic diagram of the structure of a seamless metal frame planar antenna provided in Embodiment 2 of this application. Figure 2 ;

[0030] Figure 8 This is a schematic diagram of the structure of a seamless metal frame planar antenna provided in Embodiment 3 of this application;

[0031] Figure 9 This is a structural schematic diagram of a flat panel antenna with a seamless metal frame provided in Embodiment 4 of this application.

[0032] Explanation of reference numerals in the attached figures:

[0033] 10-Feed source;

[0034] 100 - Media frame; 110 - Center plate; 120 - Side plate; 121 - First side plate; 122 - Second side plate; 123 - Third side plate; 124 - Fourth side plate;

[0035] 200 - Metal frame; 210 - Metal patch; 211 - First metal patch; 212 - Second metal patch; 213 - Third metal patch; 214 - Fourth metal patch;

[0036] 300 - Metal Flooring;

[0037] 400 - Closed groove;

[0038] 500-Power supply component;

[0039] 600 - First parasitic node;

[0040] 700 - Second parasitic node;

[0041] 800 - Third parasitic branch;

[0042] 900 - Fourth parasitic branch segment;

[0043] 1000-Phase Shifter;

[0044] 1100-Power Divider.

[0045] The accompanying drawings illustrate specific embodiments of this application, which will be described in more detail below. These drawings and descriptions are not intended to limit the scope of the concept in any way, but rather to illustrate the concepts of this application to those skilled in the art through reference to particular embodiments. Detailed Implementation

[0046] Exemplary embodiments will now be described in detail, examples of which are illustrated in the accompanying drawings. When the following description relates to the drawings, unless otherwise indicated, the same numbers in different drawings denote the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with this application. Rather, they are merely examples of apparatuses and methods consistent with some aspects of this application as detailed in the appended claims.

[0047] In related technologies, flat panel antennas can be easily integrated into electronic devices such as mobile communication terminals, tablets, and laptops, achieving structural reuse with the device shell or frame. This satisfies the requirements for lightweight and integrated device design, while also enabling the transmission and reception of multi-band signals such as Wi-Fi, Bluetooth, and 5G.

[0048] The flat panel antenna includes a dielectric frame, a metal frame, a metal ground plane, and a feed port. The metal ground plane is disposed on the lower surface of the dielectric frame. The metal frame has a closed-loop structure and is wound around the dielectric frame (equivalent to a radiating patch) and electrically connected to the metal ground plane. The feed port connects the metal ground plane and the metal frame, and is also used to connect a feed source. During operation, after the feed source is connected through the feed component, the radio frequency signal excites the metal frame electrically connected to the metal ground plane to resonate, and the metal frame acts as a radiator to radiate electromagnetic waves outward.

[0049] However, the metal frame can significantly shield antenna radiation, causing the continuous conductor loop of the metal frame to form an equivalent Faraday shield, making it difficult for mid-to-high frequency antennas to obtain sufficient radiation channels and operating bandwidth under limited clearance conditions.

[0050] Therefore, to extend the bandwidth of planar antennas, breaks, local slits, or windows are often added to the metal frame to provide a path for the antenna's radiation, thus achieving the goal of extending the bandwidth. However, this can easily weaken the overall structural strength of the metal frame, affecting its performance; for example, it can significantly increase the probability of deformation when the metal frame is subjected to external forces.

[0051] Therefore, this application provides a seamless metal-framed planar antenna, comprising: a dielectric frame; a metal frame, which is a closed-loop structure and is wound around the dielectric frame; a metal ground plane, which is disposed on the dielectric frame and electrically connected to the metal frame, and has a closed slot; at least one parasitic stub and at least two feed elements, wherein at least one feed element is electrically connected to one of the parasitic stubs; at least another feed element is electrically connected to the metal ground plane and the metal frame, or electrically connected to other parasitic stubs; each feed element is used to electrically connect to a feed source. During operation, the feed source signal can be collaboratively excited by at least two feed elements (based on multi-feed technology) to one of the parasitic stubs and the closed-slot antenna (i.e., the metal frame and the metal ground plane with the closed slot) or other parasitic stubs, thereby forming a multi-mode composite operating state and effectively expanding the bandwidth of the planar antenna. At the same time, there is no need to set breakpoints or slots on the metal frame, thus avoiding weakening the overall structural strength of the metal frame and ensuring better performance of the metal frame. Therefore, while expanding the bandwidth of the flat panel antenna, the overall structural strength of the metal frame can be guaranteed at the same time. This solves the problem in related technologies where the overall structural strength of the metal frame is easily weakened and the performance of the metal frame is affected when expanding the bandwidth of the flat panel antenna.

[0052] The technical solution of this application and how the technical solution of this application solves the above-mentioned technical problems are described in detail below with specific embodiments. These specific embodiments can be combined with each other, and the same or similar concepts or processes may not be described again in some embodiments. The embodiments of this application will now be described with reference to the accompanying drawings.

[0053] Example 1:

[0054] like Figure 1 and Figure 2 As shown, Embodiment 1 of this application provides a seamless metal frame planar antenna, comprising:

[0055] Medium frame 100;

[0056] Metal frame 200, which is a closed-loop structure, is wrapped around the medium frame 100.

[0057] A metal floor 300 is disposed on the medium frame 100. The metal floor 300 is electrically connected to the metal frame 200. A closed groove 400 is provided on the metal floor 300.

[0058] At least one parasitic branch and at least two feeders 500, at least one feeder 500 being electrically connected to one of the parasitic branches; at least another feeder 500 being electrically connected to the metal floor 300 and the metal frame 200, or electrically connected to other parasitic branches; each feeder 500 is used to electrically connect to the feed source 10.

[0059] It should be noted that the dielectric frame 100 can be made of FR-4 dielectric with a dielectric constant of 4.3 or other dielectrics, and the metal frame 200 and the metal ground plane 300 can be made of copper or other conductive materials, without limitation. In implementation, the metal ground plane 300 and the metal frame 200 can be connected by a metal transmission line (which can be a copper wire) with welded lumped components (such as capacitors, inductors, resistors, etc.), and there are matching lumped components on the metal transmission line.

[0060] A closed groove 400 is formed on the metal floor 300. In this embodiment, the closed groove 400 is a rectangular groove. In other embodiments, the closed groove 400 can also be other shapes, such as circular, fan-shaped, arc-shaped, etc.

[0061] The parasitic segments are made of metal, such as copper or aluminum. They can be manufactured using laser direct forming (LDS) technology, or other processes. In implementation, each parasitic segment can be supported and fixed inside the closed slot 400 using brackets or other structural components, thus making efficient use of the internal space of the flat panel antenna, reducing the overall space occupied, and facilitating integration. Furthermore, in some embodiments, it also facilitates coupling and feeding between the parasitic segments and the edge of the closed slot 400.

[0062] During operation, the signal at feed 10 can be collaboratively excited by at least two feed components 500 (based on multi-feed technology) to excite one of the parasitic stubs, as well as the closed slot antenna (i.e., the metal frame 200 and the metal ground plane 300 with the closed slot 400) or other parasitic stubs, thereby forming a multi-mode composite operating state and effectively expanding the bandwidth of the planar antenna. At the same time, there is no need to set breakpoints or slots on the metal frame 200, thus minimizing the overall structural strength of the metal frame 200 and ensuring its optimal performance. Therefore, while expanding the bandwidth of the planar antenna, the overall structural strength of the metal frame 200 can be guaranteed simultaneously, solving the problem in related technologies where the overall structural strength of the metal frame 200 is easily weakened in scenarios involving expanding the bandwidth of the planar antenna, thus affecting its performance.

[0063] This embodiment can be applied to the mid-to-high frequency band as an example to achieve a significant expansion of the bandwidth of the mid-to-high frequency band.

[0064] like Figure 1 As shown, in some embodiments, at least one parasitic branch is a first parasitic branch 600, at least one power supply 500 is electrically connected to the first parasitic branch 600, and at least another power supply 500 is electrically connected to the metal floor 300 and the metal frame 200. The power supply 500s are spaced apart.

[0065] In this embodiment, one parasitic branch is provided, and this parasitic branch is the first parasitic branch 600, which is located inside the closed groove 400. Two feed elements 500 are provided. The feed elements 500 can be radio frequency lines to form a mid-to-high frequency feed port; of course, the feed elements 500 can also be other forms of feed ports, such as microstrip lines, probes, etc.

[0066] It should be noted that one of the power supply components 500 can be electrically connected to the first parasitic branch 600 by welding, bonding, or other means; the other power supply component 500 can be electrically connected to the metal floor 300 and the metal frame 200 by welding, bonding, or other means, so that the power supply component 500 spans between the metal floor 300 and the metal frame 200. Furthermore, the two power supply components 500 are spaced apart and both are electrically connected to the feed source 10.

[0067] Therefore, during operation, the closed slot antenna (i.e., the metal frame 200 and the metal ground plane 300 with the closed slot 400) and the first parasitic stub 600 can be excited simultaneously by the two feed components 500, thereby fully exciting the half-wavelength mode of the closed slot antenna and the quarter-wavelength mode of the first parasitic stub 600, thus significantly widening the bandwidth of the planar antenna.

[0068] In other words, when the feed source 10 simultaneously feeds signals to the two feed components 500, one signal excites the first parasitic stub 600 to resonate and radiate through one of the feed components 500; the other signal excites the main radiating structure composed of the metal frame 200 and the metal ground plane 300 (and the closed slot 400) to resonate and radiate through the other feed component 500; thus, the first parasitic stub 600 and the main radiating structure interact through spatial electromagnetic coupling, jointly expanding the bandwidth of the flat panel antenna and achieving stable coverage of the target frequency band.

[0069] The power supply component 500, which is electrically connected to the metal floor 300, is electrically connected to the edge of the corresponding closed groove 400 of the metal floor 300.

[0070] Since the radiated current and electromagnetic field are mainly concentrated at the edge of the closed slot 400, connecting the feed element 500 to the edge of the closed slot 400 allows for the direct introduction of radio frequency signals into the region of strongest radiation, efficiently exciting the half-wavelength mode of the closed slot antenna. Furthermore, directly exciting the current at the edge of the closed slot 400 results in higher energy utilization, good impedance matching, and low reflection loss.

[0071] In addition, since each power supply component is spaced 500mm apart, it can easily form an independent radiation channel, reducing signal correlation and improving anti-interference capability.

[0072] like Figure 1As shown, in some embodiments, the unbroken metal frame planar antenna also includes a power divider 1100 and at least two phase shifters 1000. The feed element 500 is electrically connected to the power divider 1100 via the phase shifters 1000. The power divider 1100 is used to electrically connect to the feed source 10.

[0073] In this embodiment, the number of phase shifters 1000 corresponds to the number of power feeders 500. Specifically, two phase shifters 1000 are provided, and the two power feeders 500 are electrically connected to the power divider 1100 through the two phase shifters 1000 respectively. Both the phase shifters 1000 and the power divider 1100 can be existing products, and their structures are not limited. The electrical connections can be made by welding, bonding, or other methods.

[0074] Therefore, the power divider 1100 can be used to simultaneously excite the closed slot antenna and the first parasitic stub 600 from a single feed 10, reducing the number of feeds 10 and simplifying the overall excitation structure. The phase relationship between the two feed signals can be adjusted by the phase shifter 1000, enabling effective fusion of the two radiation modes.

[0075] During implementation, to ensure stable coverage of the flat panel antenna within the target communication frequency band, matching components (such as capacitors, inductors, and resistors) can be connected in series at the input of the power divider 1100 to achieve three-resonant-point characteristics. Simultaneously, the three resonant points can be tuned to achieve the required mid-to-high frequency impedance matching performance. For example, this allows the antenna to form continuous impedance coverage in the mid-to-high frequency range of 1.7-2.7 GHz, meeting the bandwidth requirements of multi-mode communication in electronic devices.

[0076] like Figure 1 As shown, in some embodiments, the media frame 100 includes a central plate 110 and a plurality of side plates 120, the side plates 120 being connected to the edge of the central plate 110, the plurality of side plates 120 being arranged around the central plate 110, and a metal floor 300 being disposed on the lower surface of the central plate 110.

[0077] The metal frame 200 includes a plurality of metal patches 210, which are respectively disposed on the outer surface of the side panel 120. The plurality of metal patches 210 are interconnected to form a closed loop structure, and at least one metal patch 210 is electrically connected to the metal floor 300.

[0078] In this embodiment, the central plate 110 has a rectangular structure and is horizontally arranged. Four side plates 120 are provided, and their lower edges can be integrally formed, welded, or otherwise connected to the four sides of the central plate 110 respectively. The four side plates 120 are also connected sequentially. The side plates 120 are perpendicular to the central plate 110; however, they can also form other angles. Both the central plate 110 and each side plate 120 can be an FR-4 dielectric substrate with a dielectric constant of 4.3.

[0079] Specifically, the four side panels 120 are the first side panel 121, the second side panel 122, the third side panel 123, and the fourth side panel 124, respectively. The first side panel 121 and the third side panel 123 correspond to the two long sides of the central panel 110, respectively, and the second side panel 122 and the fourth side panel 124 correspond to the two wide sides of the central panel 110, respectively.

[0080] At this time, the metal floor 300 is also set as a rectangular structure, and its shape corresponds to the shape of the central plate 110. The metal floor 300 can be covered on the lower surface of the central plate 110 by bonding, welding or other means. The width of the metal floor 300 can be slightly larger than the length of the fourth side plate 124.

[0081] Based on this, the closure groove 400 can be opened in the part of the metal floor 300 near one of the wide sides. Specifically, the closure groove 400 can be set near the second side plate 122.

[0082] In this embodiment, four metal patches 210 are provided, and the four metal patches 210 are interconnected to form a closed loop structure. Specifically, the four metal patches 210 are a first metal patch 211, a second metal patch 212, a third metal patch 213, and a fourth metal patch 214. The first metal patch 211, the second metal patch 212, the third metal patch 213, and the fourth metal patch 214 can be respectively disposed on the outer surfaces of the first side plate 121, the second side plate 122, the third side plate 123, and the fourth side plate 124 by bonding, welding, or other methods.

[0083] At this time, the power supply component 500, which is electrically connected to the metal frame 200, is electrically connected to the second metal patch 212.

[0084] Thus, a stable shell structure can be formed by the central plate 110 and multiple side plates 120 to provide solid support for the metal frame 200 and the metal floor 300. This allows the metal frame 200 to perform its radiation function while also having good structural strength.

[0085] In implementation, the thickness of each side plate 120 can be 0.5mm, the thickness of the center plate 110 can be 0.8mm, and the thickness of each metal patch 210 can be 0.02mm. Of course, the thickness of each component can be set to other thicknesses according to actual needs, and there are no restrictions on this.

[0086] In other embodiments, the side plate 120 and the metal patch 210 can also be set to other quantities according to actual needs, such as two, three, five, etc.; of course, it can also be one, in which case it can form a circular structure.

[0087] In this embodiment, the advantages of the multi-feed structure formed by the multi-feed component 500 compared to the single-feed structure can be further illustrated by examples.

[0088] For example, when only the feed element 500, which is electrically connected to the metal ground plane 300 and the metal frame 200, is fed, the planar antenna can only excite the slot 400 mode. When the feed element 500, which is electrically connected to the first parasitic stub 600, is fed, and the two feed elements 500 are connected to the phase shifter 1000 and the power divider 1100 to achieve multiple feeding, the planar antenna can simultaneously excite the slot 400 mode and the parasitic stub mode.

[0089] Specifically, such as Figure 3 As shown, this is a comparison diagram of S11 for a single-fed (S11A) excited closed slot antenna and a multi-fed (S11B) excited closed slot antenna and parasitic stub antenna in this embodiment. The single-fed excited closed slot antenna has a -4dB impedance bandwidth of 560MHz (1.76-2.32GHz). In contrast, the multi-fed antenna simultaneously excites the closed slot antenna and the parasitic stub antenna, and the mode is fused by adjusting the phase shifter 1000, resulting in a -4dB bandwidth of 890MHz (1.85-2.74GHz), an increase of 340MHz. Therefore, compared to the single-fed excited closed slot antenna, the multi-fed structure formed by the multi-fed component 500, which simultaneously excites the closed slot 400 mode and the parasitic stub mode, has a wider bandwidth.

[0090] like Figure 4 As shown, this is a comparison of the radiation efficiency of a single-fed (radiation efficiency A) excited closed slot antenna, a multi-fed (radiation efficiency B) excited closed slot antenna, and a parasitic stub antenna in this embodiment. In the mid-to-high frequency band (1.85-2.69GHz), the radiation efficiency of the multi-fed excited closed slot antenna and the parasitic stub antenna remains basically unchanged compared to the single-fed excited closed slot antenna.

[0091] like Figure 5As shown, this is a comparison of the system efficiency of a single-fed (system efficiency A) excited closed slot antenna and, in this embodiment, a multi-fed (system efficiency B) excited closed slot antenna and a parasitic stub antenna. In the mid-to-high frequency band (1.85-2.69 GHz), the -4dB system efficiency bandwidth of the single-fed excited closed slot antenna is 620 MHz (1.74-2.36 GHz), while the -4dB system efficiency bandwidth of the multi-fed excited closed slot antenna and the parasitic stub antenna is 960 MHz (1.80-2.76 GHz), representing an increase in system efficiency of 340 MHz.

[0092] In summary, the uninterrupted metal frame planar antenna provided in Embodiment 1 of this application allows the signal at the feed 10 to be co-excited by at least two feed components 500 (based on multi-feed technology) to excite one of the parasitic stubs, as well as the closed slot antenna (i.e., the metal frame 200 and the metal ground plane 300 with the closed slot 400) or other parasitic stubs, thereby forming a multi-mode composite working state and effectively expanding the bandwidth of the planar antenna. At the same time, there is no need to set any breaks or slots on the metal frame 200, thus minimizing the overall structural strength of the metal frame 200 and ensuring better performance. Therefore, while expanding the bandwidth of the planar antenna, the overall structural strength of the metal frame 200 can be guaranteed simultaneously, solving the problem in related technologies where the overall structural strength of the metal frame 200 is easily weakened in scenarios involving expanding the bandwidth of the planar antenna, affecting the performance of the metal frame 200.

[0093] Example 2:

[0094] like Figure 6 As shown, the difference between this embodiment 2 and embodiment 1 is that at least one parasitic branch is a second parasitic branch 700, the second parasitic branch 700 is electrically connected to the metal floor 300, and the second parasitic branch 700 is coupled to the edge of the closed groove 400.

[0095] Specifically, two parasitic segments can be set, one as the first parasitic segment 600 and the other as the second parasitic segment 700. In implementation, the first parasitic segment 600 and the second parasitic segment 700 can be distributed at intervals along the length of the closed groove 400.

[0096] For example, such as Figure 6 As shown, the first parasitic node 600 can be placed on the left side, and the second parasitic node 700 can be placed on the right side; as... Figure 7 As shown, the second parasitic branch 700 can also be placed on the left side and the first parasitic branch 600 can be placed on the right side.

[0097] In summary, the uninterrupted metal frame planar antenna provided in Embodiment 2 of this application can be directly excited by two feed components 500, respectively, for the first parasitic stub 600 and the closed slot antenna (i.e., the metal frame 200 and the metal ground plane 300 with the closed slot 400). The second parasitic stub 700 can be excited by edge coupling of the closed slot 400, thereby expanding the bandwidth of the planar antenna while ensuring the overall structural strength of the metal frame 200.

[0098] Example 3:

[0099] like Figure 8 As shown, the difference between this embodiment 3 and embodiment 1 is that at least two parasitic branches are the third parasitic branch 800 and the fourth parasitic branch 900, respectively. The power supply component 500 is electrically connected to the third parasitic branch 800, and at least one other power supply component 500 is electrically connected to the fourth parasitic branch 900.

[0100] Specifically, two parasitic branches can be set, namely the third parasitic branch 800 and the fourth parasitic branch 900. In this case, the two power supply components 500 are electrically connected to the third parasitic branch 800 and the fourth parasitic branch 900 respectively. The power supply components 500 are not electrically connected to the metal floor 300 and the metal frame 200, so that the edge of the closed groove 400 is coupled to the third parasitic branch 800 and the fourth parasitic branch 900.

[0101] In summary, the seamless metal frame planar antenna provided in Embodiment 3 of this application uses two feeders 500 to directly excite the third parasitic stub 800 and the fourth parasitic stub 900, respectively. The closed slot antenna is coupled and excited by the third parasitic stub 800 and the fourth parasitic stub 900, thereby expanding the bandwidth of the planar antenna while ensuring the overall structural strength of the metal frame 200.

[0102] Example 4:

[0103] like Figure 9 As shown, the difference between this embodiment 4 and embodiment 3 is that at least one other power supply 500 is electrically connected to the metal floor 300 and the metal frame 200.

[0104] Specifically, three power supply components 500 can be set at this time. One power supply component 500 is electrically connected to the third parasitic branch 800, one power supply component 500 is electrically connected to the fourth parasitic branch 900, and one power supply component 500 is electrically connected to the metal floor 300 and the metal frame 200.

[0105] Correspondingly, three phase shifters 1000 are also provided, and the three power supply components 500 are respectively electrically connected to the power divider 1100 through the three phase shifters 1000.

[0106] In summary, the seamless metal frame planar antenna provided in Embodiment 4 of this application uses three feed components 500 to simultaneously excite the closed slot antenna, the third parasitic stub 800, and the fourth parasitic stub 900. Furthermore, by configuring phase shifters 1000 in each of the three feed paths to adjust the phase relationship of each signal, multiple radiation modes are effectively fused, thereby further widening the overall operating bandwidth of the antenna.

[0107] It should be further noted that the technical solution of this invention has broad applicability and is not limited by any specific frequency band, structural parameters, or implementation method. In addition to being applicable to existing mobile communication frequency bands such as 4G, 5G, and millimeter wave, this invention is also applicable to other wireless communication frequency bands and standards that may emerge in the future. The geometric characteristics such as antenna element size, the structural form of the metal ground plane 300 or metal frame 200, and the dielectric material and thickness can be flexibly adjusted according to different product forms, different terminal structures, or different installation environments without affecting the applicability of the technical solution of this invention. Furthermore, this invention is not limited by factors such as the matching network type (including multiple network topologies), whether a phase shifter 1000 is configured and its phase shifting structure, phase shift angle, the type of power divider 1100 (including but not limited to active and passive power dividers 1100), the type of radiating element (such as a line antenna, slot antenna, patch antenna, or even other arbitrary radiators), or the antenna's arrangement or layout. The core technical concept of this invention can adapt to diverse engineering implementation paths. Without departing from the technical concept of this invention, any adjustments, replacements, improvements, or extensions to parameters or modules such as matching network parameters, antenna size ratio, phase shifter 1000 phase setting, power divider 1100 structure, parasitic structure morphology, and radiating element configuration can be applied to different frequency bands, different terminal forms, and different antenna integration schemes. As long as its technical implementation is based on the fundamental principles proposed in this invention, namely, exciting the radiating slot through a multi-feed method and combining parasitic branches to achieve radiation mechanism regulation and bandwidth performance improvement, then regardless of its specific structural form, parameter combination, or system architecture, it should be considered an equivalent solution of this invention. Any engineering modifications, structural derivations, parameter optimizations, or module replacements made based on the above ideas should be included within the protection scope of this invention.

[0108] Finally, it should be noted that other embodiments of the invention will readily occur to those skilled in the art upon consideration of the specification and practice of the invention disclosed herein. This invention is intended to cover any variations, uses, or adaptations of the invention that follow the general principles of the invention and include common knowledge or customary techniques in the art not disclosed herein, and is not limited to the precise structures described above and shown in the accompanying drawings, and various modifications and changes can be made without departing from its scope. The scope of the invention is limited only by the appended claims.

Claims

1. A seamless metal frame planar antenna, characterized in that, include: Medium frame (100); Metal frame (200), the metal frame (200) is a closed loop structure, the metal frame (200) is wrapped around the medium frame (100); A metal floor (300) is disposed on the medium frame (100), the metal floor (300) is electrically connected to the metal frame (200), and a closed groove (400) is provided on the metal floor (300). At least one parasitic stub and at least two feed elements (500), at least one of the feed elements (500) being electrically connected to one of the parasitic stubs; at least another feed element (500) being electrically connected to the metal ground plane (300) and the metal frame (200), or electrically connected to other parasitic stubs, to form a multimode composite operating state by co-exciting one of the parasitic stubs and the closed slot antenna or other parasitic stubs through at least two feed elements (500); each of the feed elements (500) is used to electrically connect to the feed source (10). At least one of the parasitic segments is a first parasitic segment (600), at least one of the power supply components (500) is electrically connected to the first parasitic segment (600), and at least another power supply component (500) is electrically connected to the metal floor (300) and the metal frame (200); or, At least two of the parasitic branches are a third parasitic branch (800) and a fourth parasitic branch (900), the power supply (500) is electrically connected to the third parasitic branch (800), at least one other power supply (500) is electrically connected to the fourth parasitic branch (900), and at least one other power supply (500) further includes a third power supply electrically connected to the metal floor (300) and the metal frame (200).

2. The seamless metal frame planar antenna according to claim 1, characterized in that, The power supply component (500) electrically connected to the metal floor (300) is electrically connected to the portion of the metal floor (300) corresponding to the edge of the closed groove (400).

3. The seamless metal frame planar antenna according to claim 1, characterized in that, At least one of the parasitic segments further includes a second parasitic segment (700) electrically connected to the metal floor (300) and coupled to the edge of the closed groove (400).

4. The seamless metal frame planar antenna according to any one of claims 1-3, characterized in that, Each of the aforementioned power supply components (500) is spaced apart.

5. The seamless metal frame planar antenna according to any one of claims 1-3, characterized in that, Each of the parasitic nodes is located inside the closed groove (400).

6. The seamless metal frame planar antenna according to any one of claims 1-3, characterized in that, The medium frame (100) includes a central plate (110) and a plurality of side plates (120), the side plates (120) being connected to the edge of the central plate (110), the plurality of side plates (120) being arranged around the central plate (110), and the metal floor (300) being disposed on the lower surface of the central plate (110); The metal frame (200) includes a plurality of metal patches (210), which are respectively disposed on the outer surface of the side panel (120). The plurality of metal patches (210) are connected to each other to form a closed loop structure, and at least one of the metal patches (210) is electrically connected to the metal floor (300).

7. The seamless metal frame planar antenna according to any one of claims 1-3, characterized in that, It also includes a power divider (1100) and at least two phase shifters (1000), the power supply unit (500) being electrically connected to the power divider (1100) via the phase shifters (1000), the power divider (1100) being used to electrically connect to the feed source (10).

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