Cooperative enhancement method for bandwidth and isolation of terminal antenna

Abstract

According to the terminal antenna bandwidth and isolation cooperative enhancement method, an antenna is arranged on the edge of a dielectric substrate, one face of a metal patch is attached to the inner side of a rear cover of terminal equipment, the other face of the metal patch is opposite to one face of the dielectric substrate (middle frame), and the metal patch is composed of a plurality of sub metal patches. On one hand, the sub-metal patches are effectively excited by the antenna to realize bandwidth expansion, and on the other hand, the sub-metal patches counteract an original coupling path to realize isolation enhancement. The metal patches are arranged on the periphery of the antenna, and the size and the position of the metal patches are optimized, so that the antenna can realize wide bandwidth and high isolation under the condition of extremely small clearance and distance. The method can be widely applied to the fields of mobile communication terminal equipment, Internet of Things terminal equipment and the like.

Description

Technical Field

[0001] The present invention belongs to the field of antenna technology, and specifically relates to performance improvement of terminal device antennas, and in particular to a method for collaboratively enhancing the bandwidth and isolation of terminal antennas. Background Art

[0002] With the rapid development of 5G communication technology, modern smart terminals are placing higher demands on the performance of multi-antenna systems. However, as space within terminal devices becomes increasingly limited, the contradiction between antenna density and limited bezel space becomes increasingly prominent, posing a severe challenge to traditional bezel antenna design.

[0003] In the existing technology, most studies focus on developing planar antennas on the back cover to expand the radiation space, but often fail to fully consider the potential for collaborative optimization of the back cover structure and the frame antenna. Current improvement methods have obvious shortcomings: although the use of multi-branch or reconfigurable technology can improve performance to a certain extent, it will increase circuit complexity and affect radiation efficiency; the decoupling method based on defective ground structure requires additional circuit board space, which is contrary to the trend of lightweight and thin terminals. Therefore, this field urgently needs to develop new spatial multiplexing technologies. How to achieve the simultaneous improvement of antenna bandwidth and isolation in the extremely small space of the terminal is the focus of the present invention. Summary of the Invention

[0004] In order to overcome the shortcomings of the above-mentioned prior art, the purpose of the present invention is to provide a method for collaboratively enhancing the bandwidth and isolation of terminal antennas, so as to solve the common problems of limited bandwidth and severe mutual coupling under high-density antenna layout, and achieve synchronous optimization of antenna performance without increasing the frame space.

[0005] In order to achieve the above object, the technical solution adopted by the present invention is:

[0006] A method or structure for collaboratively enhancing the bandwidth and isolation of a terminal antenna, wherein an antenna pair is arranged at the edge of a dielectric substrate, one side of a metal patch is attached to the inside of a back cover of the terminal device, and the other side is opposite to one side of the dielectric substrate. The metal patch is designed to be composed of multiple sub-metal patches arranged along a first direction, where the first direction is parallel to the antenna pair. The sub-metal patches have edges along the first direction, and among the edges along the first direction, the one closest to the antenna pair is defined by the present invention as a special edge. The length of the special edge is λ / 2±λ / 4, where λ is the dielectric wavelength corresponding to the antenna center frequency.

[0007] In one embodiment, the sub-metal patch is rectangular, square, trapezoidal, L-shaped, or an irregular shape that can achieve the aforementioned function. The shape can be single or combined. It only needs to ensure that the length of the aforementioned special side meets the requirements to generate effective resonance, and the position of the sub-metal patch and the antenna pair meet the aforementioned requirements to effectively offset the original coupling path.

[0008] In one embodiment, the edge of the sub-metal patch close to the edge of the back cover is the edge along the first direction and closest to the antenna pair. Preferably, when the antenna pair is arranged at the edge of the dielectric substrate, the edge close to the edge is projected opposite to the aforementioned special edge.

[0009] In one embodiment, the number of antenna pairs is N, i.e., there are 2N antennas. The number of sub-metal patches is preferably 2N, arranged in a one-to-one correspondence with the 2N antennas, i.e., 2N sub-metal patches correspond to N groups of antenna pairs. Alternatively, the number of sub-metal patches is 2N+1, where 2N sub-metal patches are arranged in a one-to-one correspondence with the 2N antennas, and the remaining sub-metal patch is arranged at the symmetric center of the antenna pair, forming a 2N+1 configuration, further improving isolation. In the present invention, N ≥ 1. The sub-metal patches are arranged in a single row along the aforementioned first direction.

[0010] In one embodiment, two sub-metal patches are provided for one antenna pair, and the arrangement positions of the two sub-metal patches are determined by the coupling path cancellation equation as follows:

[0011]

[0012] Where, represents the transmission coefficient of the original inter-antenna coupling path path0, It represents the transmission coefficient of the newly added coupling path path1 after the introduction of the first sub-metal patch, It represents the transmission coefficient of the newly added coupling path path2 after the introduction of the second sub-metal patch. Set to 0 to achieve decoupling.

[0013] Furthermore, one antenna can also correspond to multiple sub-metal patches. In this case, the position design can still be performed according to the above formula, that is, pathk is the coupling path added after the introduction of the kth sub-metal patch, is the transmission coefficient of path k. The subscript 21 here indicates the transmission from port 1 to port 2 of the antenna.

[0014] The arrangement of the frame edge of the terminal device of the antenna pair of the present invention can be arbitrary.

[0015] In one embodiment, the terminal device may be a mobile phone, a satellite terminal, a tablet computer, a laptop computer, etc., and the back cover may be a back cover of the terminal body or a detachable protective shell.

[0016] In one embodiment, the dielectric substrate is a midframe of a terminal device, having a front face and a rear face. The rear face is adjacent to and opposite a rear cover, separated by an air layer, while the front face is the face away from the rear cover. In the present invention, the antenna pair is disposed on the front face of the dielectric substrate, with one side of the metal patch disposed on the inner side of the rear cover, with the other side facing the rear face of the dielectric substrate.

[0017] In one embodiment, the present invention designs a matching module for the antenna pair, wherein the matching module includes a variety of lumped elements to achieve antenna impedance matching.

[0018] Furthermore, the matching module includes two sets of matching circuits arranged symmetrically; each set of matching circuits includes: a slot structure on a metal floor; a first rectangular patch arranged in the slot; a first feeding probe and a first capacitor C1 connecting the metal floor and the first rectangular patch; and a first inductor L1 connecting the antenna and the first rectangular patch (9) to achieve antenna impedance matching.

[0019] Furthermore, the slots include a first U-shaped slot and a first rectangular slot, the first U-shaped slot assumes the main isolation function; the first rectangular slot is used for component layout; the two work together to construct a spatial layout suitable for subsequent component installation.

[0020] Compared with the prior art, the present invention has the following beneficial effects:

[0021] For mobile terminal antennas, by placing a metal patch on the back cover and rationally designing its size, the back cover patch is no longer a separate component from the frame antenna, but instead can assist in the frame antenna design: the metal patch can provide a new radiation pattern and additional coupling paths, thereby improving the bandwidth of the frame antenna and reducing inter-antenna coupling. In this way, the optimization of antenna communication performance and the utilization of back cover space are no longer isolated from each other. While participating in the antenna function, the back cover patch still meets the layout requirements of the phone's back cover. The back cover patch can achieve a simultaneous enhancement of the frame antenna's bandwidth and isolation, significantly improving the overall performance of the frame antenna, which is of great practical value for mobile terminals. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 This is a side view of the overall structure of a mobile terminal antenna according to a preferred embodiment of the present invention.

[0023] Figure 2 This is a perspective view of the overall structure of a mobile terminal antenna according to a preferred embodiment of the present invention.

[0024] Figure 3 This is a partial top view of the middle frame of a mobile terminal antenna according to a preferred embodiment of the present invention.

[0025] Figure 4 This is a top view of the back cover of a mobile terminal antenna according to a preferred embodiment of the present invention.

[0026] Figure 5 This is a detailed diagram of the matching module of a mobile terminal antenna according to a preferred embodiment of the present invention.

[0027] Figure 6 This is a schematic diagram of the sub-metal patch position design principle of a preferred embodiment of the present invention, (a) is without the introduction of the sub-metal patch, and (b) is with the introduction of the sub-metal patch.

[0028] Figure 7 FIG. 1 is a schematic diagram of an S-parameter curve of a mobile terminal antenna according to a preferred embodiment of the present invention.

[0029] Figure 8 FIG. 1 is a schematic diagram of a total efficiency curve of a mobile terminal antenna according to a preferred embodiment of the present invention.

[0030] Figure 9 For comparison with a preferred embodiment of the present invention, a schematic diagram of an S-parameter curve without adding a metal patch is shown.

[0031] Figure 10 A schematic diagram of the total efficiency curve without adding a metal patch is shown for comparison with a preferred embodiment of the present invention.

[0032] Explanation of the accompanying drawings: 1. Metal floor; 2. Dielectric substrate; 3. Antenna pair; 4. Air layer; 5. Metal patch; 6. Back cover; 7. Matching module; 8. First feeding probe; 9. First rectangular patch; 10. First U-shaped slot; 11. First rectangular slot; 12. Second feeding probe; 13. Second rectangular patch; 14. Second U-shaped slot; 15. Second rectangular slot. DETAILED DESCRIPTION

[0033] The preferred embodiments of the present invention are described below in conjunction with the accompanying drawings to elaborate on the technical method in detail. It should be noted that the preferred embodiments and their descriptions provided herein are used to explain the present invention. Although some specific details are introduced to facilitate in-depth understanding, they do not constitute a limitation on the scope of the invention. Obviously, those skilled in the art can implement the present invention without relying on these specific details. In addition, based on the technical method disclosed in the present invention, all equivalent replacements or obvious variations that can be derived by ordinary technicians in this field without creative work should be deemed to fall within the scope of protection of the present invention.

[0034] This paper proposes a method for collaboratively enhancing the bandwidth and isolation of terminal antennas. The resulting antenna has wider bandwidth and stronger isolation than a single monopole under minimal headroom. The present invention's method for collaboratively enhancing the bandwidth and isolation of terminal antennas involves both bandwidth expansion and isolation enhancement for mobile terminal antennas.

[0035] like Figures 1 to 5As shown, the mobile terminal antenna includes a metal floor 1, a dielectric substrate 2, an antenna pair 3, an air layer 4, a metal patch 5 and a back cover 6.

[0036] The dielectric substrate 2 forms the mobile terminal's midframe, with front and rear end surfaces. The antenna pair 3 is positioned at the edge of the front end of the dielectric substrate 2, as is the metal floor 1. One side of the metal patch 5 is attached to the inside of the terminal's back cover 6, while the other side faces the rear end of the dielectric substrate 2, separated by an air layer 4.

[0037] The present invention achieves a synergistic enhancement of terminal antenna bandwidth and isolation by designing the metal patch 5 as multiple sub-metal patches arranged in a first direction, simultaneously providing bandwidth expansion and isolation enhancement for the antenna. The first direction herein refers to a direction parallel to the antenna pair 3. Furthermore, the sub-metal patch has an edge along the first direction. Of these edges along the first direction, the one closest to the antenna pair 3 has a length of approximately half the dielectric wavelength λ corresponding to the antenna center frequency, preferably λ / 2±λ / 4, to enable effective resonance. For ease of presentation, the present invention defines this edge as a special edge.

[0038] The shape of the sub-metal patch of the present invention is not limited, and can typically be rectangular, square, trapezoidal, L-shaped, or a combination thereof. In the case of a rectangle, the special side is the long side of the rectangle near the edge. In the case of a square, the special side is the side of the square near the edge. In the case of a trapezoid, the special side is the side of the trapezoid near the edge, which can be the upper or lower base of the trapezoid, or the waist of the trapezoid. In the case of an L-shape, the special side is the outer edge of the arm of the L-shape near the edge.

[0039] The number of antenna pairs 3 of the present invention is arbitrary. Each antenna can be set in one-to-one correspondence with a sub-metal patch, or an additional sub-metal patch can be set in correspondence with the symmetrical center gap of the antenna pair 3.

[0040] The antennas comprising antenna pair 3 of the present invention can be of any type, including monopoles, loop antennas, and other antenna types. They can be positioned face-to-face, back-to-back, or both, and can be arranged at various locations along the edges of dielectric substrate 2. Each antenna in antenna pair 3 is directly connected to a feed probe, which directly excites antenna pair 3.

[0041] To illustrate the principle of the present invention, the number of antenna pairs 3 is 1, and the shape of the sub-metal patch is rectangular and the number is 3 as an example for description. The principles of other shapes and numbers are similar.

[0042] In this embodiment, the horizontal length and vertical length of the dielectric substrate 2 and the back cover 6 are both set to 150×75 mm. 2, which is the size of a standard mobile phone. It should be noted that the above-mentioned dimensional parameters are only exemplary. Those skilled in the art should understand that reasonable adjustments to their dimensions based on actual product requirements will not affect the radiation performance of the antenna of the present invention. The materials used for the dielectric substrate 2 and the back cover 6 are both F4B (dielectric constant is 2.2), with thicknesses of 1.0 mm and 0.25 mm respectively. However, those skilled in the art will understand that any dielectric material suitable for antenna design can be used instead, and the protection scope of the present invention is not limited to the above-mentioned specific materials. In particular, the longitudinal dimension of the metal floor 1 is slightly smaller than that of the dielectric substrate 2. This design not only reserves the necessary clearance area for the 2.6 GHz border antenna, but also optimizes the radiation characteristics of the monopole antenna structure. Those skilled in the art will understand that, based on the design principles of the present invention, reasonable adjustments to the size and shape of the clearance area and the monopole structure fall within the protection scope of the present invention. A pair of 2.6G frame antennas are placed horizontally in a back-to-back manner at the center of one edge of the front end surface of the dielectric substrate 2 to form an antenna pair 3. The physical dimensions of each antenna unit are preferably 25.7mm in length (corresponding to a 1 / 4 resonant length of the target frequency band dielectric wavelength) and 0.5mm in width. It should be noted that the length parameter can be adjusted according to the λ / 4 relationship based on the actual operating frequency, and the width parameter can be optimized and selected based on the structural strength and impedance matching requirements, and no special regulations are made. Those skilled in the art should understand that, under the premise of maintaining the antenna radiation characteristics, not only the back-to-back arrangement, but also other relative arrangements (such as side by side, oblique, etc.) and reasonable adjustments to the above-mentioned dimensional parameters, as long as they can achieve equivalent technical effects, all fall within the scope of protection of the present invention. The thickness of the air layer 4 is set to 1.4mm to simulate the actual environment of the mobile phone and can be adjusted according to specific circumstances.

[0043] The metal patch 5 is located at the lateral edge of the back cover 6 of the mobile terminal. It is composed of three electromagnetically optimized rectangular sub-metal patches. The length parameter of each sub-metal patch is designed to be 1 / 2 of the wavelength of the target frequency band medium (preferably 47.0 mm in this embodiment), and the width is determined to be 2.5 mm through simulation optimization to balance the bandwidth and isolation performance.

[0044] Electromagnetic optimization here means optimizing its size to effectively resonate near the antenna operating frequency, thereby achieving bandwidth expansion, and optimizing its position to effectively offset the coupling path between the original antennas, thereby achieving decoupling.

[0045] At this time, since the antenna structure is symmetrical about the center, the central sub-metal patch can optimize the performance of both antennas; while the other two sub-metal patches only affect the antennas closer to them. Therefore, the central sub-metal patch and the one side sub-metal patch together affect the antenna on that side, and the central sub-metal patch and the other side sub-metal patch together affect the antenna on the other side. Therefore, the central sub-metal patch and the two sub-metal patches adjacent to the monopole antenna (see Figures 2 to 4 The corresponding relationship) improves performance through a dual mechanism:

[0046] On the one hand, the initial monopole antenna works in the λ / 4 mode with a narrow bandwidth. After adding the sub-metal patch, the length of the sub-metal patch is λ / 2±λ / 4, which can work in the TM 01 The two modes merge to achieve bandwidth expansion. Furthermore, the sub-metal patch, located at the edge of the floor, effectively stimulates some floor currents, also contributing to bandwidth expansion. This allows the bandwidth of the monopole antenna to be extended by exciting the resonant mode.

[0047] On the other hand, the initial coupling path is a single one from antenna one to antenna two, resulting in poor isolation. The introduction of the central and side sub-metallic patches provides two additional coupling paths for antenna one or antenna two, respectively. By adjusting the patch size and relative position to the antenna, the newly introduced coupling can offset the initial coupling at two frequencies, creating two nulls and improving overall in-band isolation. This achieves cancellation of the original coupling path, significantly improving isolation.

[0048] Those skilled in the art should understand that adaptive adjustments to the number, size and arrangement of patches based on the same working principle, as long as equivalent technical effects are achieved, fall within the scope of protection of the present invention.

[0049] like Figure 5 As shown, two matching modules 7 are distributed next to the 2.6G frame antenna pair according to the embodiment of the present invention, which fully demonstrates the dual-path symmetrical design of the matching module 7.

[0050] Specifically, the matching module 7 of the 2.6G frame antenna pair consists of two symmetrical parts, corresponding to two monopole antennas. Taking one of them as an example (the other is symmetrical in structure and has the same principle), it is physically separated from the metal floor 1 by a first U-shaped slot 10 and a first rectangular slot 11. The width of the first U-shaped slot 10 is 0.35mm, which plays the basic spatial isolation function, while the size of the first rectangular slot 11 is set to 0.85×0.45mm. 2 , and the first U-shaped slot 10 cooperates to construct a spatial layout suitable for subsequent component installation. The matching structure includes a first rectangular patch 9, whose size is optimized to 1.5×1.5mm 2, providing adaptation space for the welding of lumped components (first inductor L1, 0.23nH; first capacitor C1, 1.4pF). The above components are used to achieve antenna impedance matching, and their parameters can be adjusted according to the actual frequency band requirements. As long as the port matching is achieved, it is not limited to this value. In order to ensure the installation and performance of the components, the spacing around the first rectangular patch 9 and the 2.6G monopole and the first U-shaped slot are all set to 0.35mm, which is suitable for the welding of 0402 model lumped components. The distance between the first rectangular patch 9 and the first rectangular slot 11 is set to 0.8mm, which is used to connect the first feeding probe 8 of 2.6G, and the above spacing and size parameters can be targetedly changed according to the component model, feeding type, etc. The scope of protection of the present invention covers its adjustable technical methods. The other symmetrical structure can be symmetrically expanded with reference to the above content, such as Figure 5 As shown, it mainly includes a second U-shaped slot 14 and a second rectangular slot 15 , as well as a second rectangular patch 13 , a second inductor L2 , and a second capacitor C2 arranged in the slots, wherein the second rectangular patch 13 is connected to the second feeding probe 12 .

[0051] like Figure 6 As shown, the position design of the sub-metal patch of the present invention is optimized according to the following formula:

[0052]

[0053] Where path0 is the coupling path between the two antennas, and no sub-metal patch is introduced at this time. is the transmission coefficient through path0. Represents the coupling between antenna pairs. pathk is the coupling path added after the introduction of the kth sub-metal patch. is the transmission coefficient through path pathk. Figure 6 In the structure shown, two sub-metal patches are provided for one antenna pair, and the arrangement positions of the two sub-metal patches are optimized according to the following formula:

[0054]

[0055] After the patch is introduced, the current will not flow directly from one antenna to the other, but will pass through the new patch. The position of the patch is optimized so that the current effectively cancels the coupling current between the antenna pair. is 0, thus achieving decoupling.

[0056] The various performances of this preferred embodiment were tested using CST software. Figure 7 、 Figure 8As shown, the monopole antenna pair excited by the first feeding probe 8 and the second feeding probe 12 respectively achieves an operating bandwidth of 2.43-2.76GHz (330MHz) and 2.43-2.77GHz (340MHz), with an intra-band isolation better than 15.0dB and an average total efficiency of -2.7dB and -1.8dB, respectively. Figure 9 、 Figure 10 In the comparative embodiment shown without the metal patch 5, the operating bandwidth of the corresponding antenna is reduced to 2.50-2.70GHz (200MHz) and 2.48-2.69GHz (210MHz), the isolation is reduced to 8.2dB, and the average total efficiency is degraded to -5.2dB and -3.5dB. The test results show that by introducing the metal patch 5, the present invention expands the antenna bandwidth by 1.6-1.7 times, improves the isolation by 6.8dB, and significantly improves the efficiency. It should be understood by those skilled in the art that due to factors such as processing tolerances and test environment, there may be reasonable deviations in the performance parameters of the actual product, and these implementation variations are all within the scope of protection of the present invention.

[0057] The present invention can be modified in various ways, such as changing the dielectric substrate material to further reduce the antenna height, or changing the length of the radiating patch and the values ​​of the lumped components in the matching module to enable the antenna to operate in other frequency bands. All parameters proposed in the present invention can be adjusted while ensuring impedance matching.

[0058] Compared with the existing technology, this preferred embodiment effectively enhances the bandwidth and isolation synergistically. By utilizing multiple metal patches, on the one hand, it can effectively resonate and expand the antenna bandwidth, and on the other hand, it can offset the original coupling path to achieve improved isolation.

[0059] It should be noted that, in this document, relational terms such as "first" and "second" are used solely to distinguish one entity or operation from another, and do not necessarily require or imply any actual relationship or order between these entities or operations. Furthermore, the orientation or positional relationships indicated by "upper" and "lower" are based on the orientation or positional relationships shown in the accompanying drawings and are intended solely to facilitate the description of the present invention and simplify the description. They do not indicate or imply that the devices or elements referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on the present invention.

[0060] While specific embodiments of the present invention have been described above, it will be apparent to those skilled in the art that the present invention is not limited to the details of the preferred embodiments described above. These embodiments are intended to be illustrative and non-restrictive, and the scope of the present invention is defined by the appended claims. Those skilled in the art may make various changes or modifications to these embodiments without departing from the principles and essence of the present invention, and such changes and modifications are intended to fall within the scope of the present invention.

Claims

1. A method for collaboratively enhancing terminal antenna bandwidth and isolation, characterized in that: The antenna pair (3) is arranged at the edge of a dielectric substrate (2); one side of a metal patch (5) is arranged on the inner side of a rear cover (6) of a terminal device, and the other side is arranged opposite to the dielectric substrate (2); the metal patch (5) is composed of a plurality of sub-metal patches arranged along a first direction, wherein the first direction is parallel to the arrangement direction of the antenna pair (3); each sub-metal patch has at least one edge along the first direction, wherein the edge closest to the antenna pair (3) is defined as a special edge, and the length L of the special edge satisfies λ / 2±λ / 4, wherein λ is the dielectric wavelength corresponding to the antenna center frequency.

2. The method for collaboratively enhancing terminal antenna bandwidth and isolation according to claim 1, characterized in that: The geometric shape of the sub-metal patch is selected from any one of the following or a combination thereof: rectangle, square, trapezoid, and L-shape.

3. The method for collaboratively enhancing terminal antenna bandwidth and isolation according to claim 1 or 2, characterized in that: The side of the sub-metal patch close to the edge of the back cover (6) is the side along the first direction and closest to the antenna pair (3).

4. The method for collaboratively enhancing terminal antenna bandwidth and isolation according to claim 1, wherein: The number of sub-metal patches is configured to meet any of the following conditions: a one-to-one correspondence with the number of antennas, that is, 2N sub-metal patches correspond to N groups of antenna pairs (3); or, one sub-metal patch is added at the symmetric center of the corresponding antenna pair (3) to form a 2N+1 configuration; where N≥1.

5. The method for collaboratively enhancing terminal antenna bandwidth and isolation according to claim 1, characterized in that: Two sub-metal patches are set for each antenna pair, and the arrangement position of the sub-metal patches is determined by the coupling path cancellation equation Where, represents the transmission coefficient of the original inter-antenna coupling path path0, It represents the transmission coefficient of the newly added coupling path path1 after the introduction of the first sub-metal patch, It represents the transmission coefficient of the newly added coupling path path2 after the introduction of the second sub-metal patch. Set to 0 to achieve decoupling.

6. The method for collaboratively enhancing terminal antenna bandwidth and isolation according to claim 1, characterized in that: The terminal device is a mobile phone, a satellite terminal, a tablet computer or a laptop computer, and the back cover (6) is a back cover of the terminal body or a detachable protective shell.

7. The method for collaboratively enhancing terminal antenna bandwidth and isolation according to claim 1, characterized in that: The invention also includes an impedance matching module (7) configured for each antenna pair (3), wherein the matching module (7) includes two symmetrically arranged matching circuits; each matching circuit includes: a slot structure on a metal floor (1); a first rectangular patch (9) arranged in the slot; a first feeding probe (8) and a first capacitor C1 connecting the metal floor (1) and the first rectangular patch (9); and a first inductor L1 connecting the antenna and the first rectangular patch (9).

8. The method for collaboratively enhancing terminal antenna bandwidth and isolation according to claim 7, characterized in that: The slot structure comprises: a first U-shaped slot (10) which assumes the main isolation function; and a first rectangular slot (11) which is used for component layout; the two cooperate to construct a spatial layout suitable for subsequent component installation.

9. The method for collaboratively enhancing terminal antenna bandwidth and isolation according to claim 1, characterized in that: The plurality of sub-metal patches are arranged in a single row along the first direction.

10. The method for collaboratively enhancing terminal antenna bandwidth and isolation according to claim 1, characterized in that: When the center frequency of the antenna pair (3) is 2.6 GHz: The antenna pair (3) is arranged back to back, with each antenna having a length of 25.7 mm and a width of 0.5 mm; The number of the sub-metal patches is 3 and the shape is rectangular; The side length along the first direction is 47.0 mm, and the short side dimension is 2.5 mm; The two terminal metal patches correspond to the two antennas one-to-one, and the central metal patch corresponds to the gap between the two antennas.

Images