Antenna unit, communication device

Abstract

The application relates to an antenna unit and a communication device, comprising: a radiation part having a feed point, a first grounding point and a second grounding point for connecting with a floor respectively, at least part of a radiation branch between the first grounding point and the second grounding point of the radiation part is surrounded to form a first slot gap, a slot opening of the first slot gap is located at a side of the part of the radiation branch away from the floor, and the feed point is located at a side of the part of the radiation branch close to the floor; a feed source outputs a feed signal to excite the radiation part to generate a current flowing to the floor from the feed point along the radiation branch surrounded to form the first slot gap and through the first grounding point and the second grounding point respectively. The first slot gap cuts off the current flowing to the floor in parallel to the whole radiation part, introduces the current in the vertical direction of the floor, so that the antenna unit can generate transverse current and longitudinal current on the floor at the same time, balances the distribution of the current, and reduces the directivity coefficient.

Description

Technical Field

[0001] This application relates to the field of antenna technology, and in particular to an antenna element and a communication device. Background Technology

[0002] In antenna applications, regulations in various regions have limits on EIRP (Equivalent Isotropically Radiated Power), especially for WIFI antennas required for communication devices such as tablets. The antennas not only need to be efficient, but also need to have low gain, that is, low directivity.

[0003] However, the orientation coefficient is greatly affected by the overall environment and size of the device, especially for large tablets, such as 10-inch tablets which are 252.2*163.7mm in length and width, which makes the design of the orientation coefficient more difficult. Summary of the Invention

[0004] This application provides an antenna unit and a communication device that can reduce the directivity coefficient of the antenna.

[0005] The first aspect of this application provides an antenna element, comprising:

[0006] The radiating section has a feed point and a first grounding point and a second grounding point for connection with the floor, respectively. At least a portion of the radiating branches between the first grounding point and the second grounding point of the radiating section are arranged to form a first groove-shaped gap. The portion of the radiating branch has at least a gap opening facing two opposing first free ends and forming the first groove-shaped gap between the two first free ends. The gap opening is located on the side of the portion of the radiating branch away from the floor, and the feed point is located on the side of the portion of the radiating branch closer to the floor.

[0007] A feed source, connected to the feed point, is used to output a feed signal to excite the radiating part to generate a current that flows from the feed point along the first slot-shaped gap and through the first grounding point and the second grounding point to the floor.

[0008] A second aspect of this application provides a communication device, comprising:

[0009] Floor; and

[0010] The antenna unit as described above.

[0011] In the aforementioned antenna unit and communication equipment, the antenna unit includes a radiating section and a feed source. The radiating section has a feed point connected to the feed source and a first ground point and a second ground point for connection to the ground. At least a portion of the radiating stubs between the first and second ground points of the radiating section form a first slot-shaped gap. Each radiating stub has at least one slot opening facing two opposing first free ends, with the first slot-shaped gap formed between the two first free ends. The slot opening is located on the side of the radiating stub away from the ground, and the feed point is located on the side of the radiating stub closer to the ground. The feed source outputs a feed signal that excites the radiating section to generate current flowing from the feed point along the radiating stubs forming the first slot-shaped gap, and through the first and second ground points to the ground. Therefore, the first slot-shaped gap cuts off the current flowing parallel to the ground in the radiating section as a whole, introducing current flowing away from the ground and current flowing closer to the ground, allowing the antenna unit to simultaneously generate lateral and longitudinal currents on the ground, thus balancing the current distribution. Therefore, the antenna element is no longer limited by its position in the whole device, and its directivity coefficient is low, which greatly increases the flexibility and feasibility of antenna element design. Attached Figure Description

[0012] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0013] Figure 1 This is one of the structural diagrams of an antenna element in one embodiment;

[0014] Figure 2 This is a second structural diagram of an antenna element in one embodiment;

[0015] Figure 3 This is the third structural diagram of an antenna element in one embodiment;

[0016] Figure 4 The fourth structural diagram of an antenna element in one embodiment;

[0017] Figure 5 This is the fifth structural diagram of an antenna element in one embodiment;

[0018] Figure 6 This is the sixth structural diagram of an antenna element in one embodiment;

[0019] Figure 7 The seventh structural diagram of an antenna element in one embodiment;

[0020] Figure 8This is the eighth structural diagram of an antenna element in one embodiment;

[0021] Figure 9 This is the ninth structural diagram of an antenna element according to one embodiment;

[0022] Figure 10 This is the tenth structural diagram of an antenna element according to one embodiment;

[0023] Figure 11 This is a structural diagram of a Dipoole antenna according to one embodiment;

[0024] Figure 12 This is a structural diagram of an embodiment of an asymmetric Dipole antenna;

[0025] Figure 13 Here is the radiation pattern of a Dipole antenna according to one embodiment;

[0026] Figure 14 Here is the radiation pattern of an asymmetric Dipole antenna according to one embodiment;

[0027] Figure 15 The radiation pattern of an IFA antenna positioned at the corner of the long side of the device, as shown in one embodiment;

[0028] Figure 16 This is a diagram showing the lateral periodic current distribution of an IFA antenna excited on the floor in one embodiment.

[0029] Figure 17 An example of adjusting the antenna position at the short side or middle position;

[0030] Figure 18 This is a diagram showing the lateral periodic current distribution of an antenna element excited on the floor in one embodiment.

[0031] Figure 19 The radiation pattern of an antenna element in one embodiment;

[0032] Figure 20 This is a structural block diagram of a communication device in one embodiment. Detailed Implementation

[0033] To make the objectives, technical solutions, and advantages of this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the scope of this application.

[0034] It is understood that the terms "first," "second," etc., used herein may be used to describe various elements, but these elements are not limited by these terms. These terms are only used to distinguish one element from another and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0035] It should be noted that when a component is said to be "set on" another component, it can be directly on the other component or there may be an intervening component. When a component is said to be "connected to" another component, it can be directly connected to the other component or there may be an intervening component.

[0036] In antenna applications, EIRP = Conducted Power + Antenna Directivity (D). To ensure that EIRP does not exceed the limit, if the conducted power is reduced, the antenna's TRP will also decrease, weakening the signal coverage and failing to meet the user's needs.

[0037] For the reasons mentioned above, it is necessary to minimize the antenna's directivity to improve TRP while complying with regulations. In related technologies, the directivity is typically optimized by adjusting the antenna's position on the flat panel, for example, placing the antenna in the middle of the long side of the device. However, adjusting the antenna position greatly limits the flexibility of antenna layout; for example, due to ID limitations, a layout in the middle of the long side is often impossible. Therefore, this application provides an antenna element and communication device that can reduce the antenna's directivity and improve the flexibility of antenna layout.

[0038] Figure 1 This is one of the structural diagrams of an antenna element according to an embodiment, with reference to... Figure 1 In this embodiment, the antenna unit 10 includes a radiating part 100 and a feed 200.

[0039] The radiating section 100 has a feed point and a first grounding point and a second grounding point for connection with the floor 20, respectively. At least a portion of the radiating branches between the first grounding point and the second grounding point of the radiating section 100 are arranged to form a first groove-shaped gap 300. Figure 1(Illustrated with only one possible slot structure) The partial radiating branch has at least one slot opening facing two opposing first free ends and forming a first groove-shaped slot 300 between the two first free ends. The slot opening is located on the side of the partial radiating branch away from the floor 20, and the feed point is located on the side of the partial radiating branch close to the floor 20. The feed source 200 is connected to the feed point and is used to output a feed signal to excite the radiating part 100 to generate a current from the feed point along the radiating branch forming the first groove-shaped slot 300, and flowing to the floor 20 through the first grounding point and the second grounding point respectively.

[0040] The feed source 200 is connected to the feed point to provide a common feed signal to each radiating stub of the radiating section 100. Optionally, the feed source 200 can be connected via feed lines or feed stubs ( Figure 1 (Taking the feed branch 400 as an example for illustration) Connected to the feed point, the feed source 200 can be a device such as an RF chip that provides excitation signals, and the specific device can be determined according to actual needs. This application embodiment does not limit this. Optionally, a tuning circuit can be provided between the feed source 200 and the feed point of the radiating part 100 to tune the resonant frequency of the antenna element 10, so that the antenna element 10 supports transmission and reception processing of different frequency bands; Optionally, a matching circuit can also be provided between the feed source 200 and the feed point of the radiating part 100 to adjust the impedance of the radiating part 100 to match the state of the feed source 200 (for example, tuned to 75 ohms or 50 ohms), thereby improving the transmission and reception efficiency of the antenna element 10.

[0041] The radiating element 100 is connected to the feed source 200 via a feed point to receive feed signals. Under the excitation of the signal from the feed source 200, it generates current to achieve the transmission and reception of electromagnetic wave signals. The radiator is electrically connected to the floor 20 via a first grounding point and a second grounding point, so that during radiation, current flows from the first grounding point and the second grounding point to the floor 20 respectively. Optionally, each grounding point can be connected via a grounding wire or a grounding branch (…). Figure 1 (Taking grounding branch 500 as an example for illustration) it is connected to the floor 20.

[0042] Since at least a portion of the branches between the first and second grounding points of the radiating section 100 encloses a first groove-shaped slot 300, and this portion of the radiating branch has at least a slot opening facing two opposing first free ends and forming the first groove-shaped slot 300 between the two first free ends, therefore, as Figure 2 As shown ( Figure 2(Feed source 200 not shown) The current generated by the excitation of the radiating part 100 is divided into two parts by the first slot 300 from the feed point. One part of the current flows from the feed point along the radiating branch on one side of the first slot 300 through the first ground point to the ground 20, and the other part of the current flows from the feed point along the radiating branch on the other side of the first slot 300 through the second ground point to the ground 20, so as to form a circulating current on the antenna element 10 and the ground 20.

[0043] Therefore, the first slot 300 cuts off the first current flowing parallel to the floor 20 in the radiating part 100 as a whole, so that the current flows along the branch forming the first slot 300 toward the grounding points on both sides, thereby introducing a second current flowing away from the floor 20 and a third current flowing toward the floor 20, so that the antenna element 10 can simultaneously generate a transverse current (which can be understood as a current in the floor 20 that flows parallel to the first current) and a longitudinal current (which can be understood as a current in the floor 20 that flows parallel to the second and third currents), thus balancing the current distribution.

[0044] Through creative work, the inventors discovered that in related technologies, the influence of antenna position on the directivity coefficient is mainly due to the strong transverse periodic current generated on the ground plane 20 when the antenna element 10 is excited by current at certain locations, which leads to a deterioration of the directivity coefficient. However, the antenna element 10 provided in this application includes a radiating part 100 and a feed 200. A first slot-shaped slot 300 with a slit is formed by partially radiating branches of the radiating part 100. This allows the radiating part 100 to generate both transverse and longitudinal currents on the ground plane 20 when excited by the feed signal, weakening the intensity of the transverse periodic current and balancing the current distribution. As a result, the antenna element 10 is no longer limited by its position in the whole device, and has a low directivity coefficient, greatly increasing the flexibility and feasibility of the antenna element 10 design, and is no longer limited by the ID environment.

[0045] In some embodiments, such as Figure 3 As shown ( Figure 3 Only one alternative structure is illustrated, and only the radiating section 100 and the feed branch 400 are shown. The radiating section 100 includes a plurality of first radiating branches 110 and a plurality of second radiating branches 120.

[0046] The first radiating branch 110 extends parallel to the floor 20, and the second radiating branch 120 extends perpendicular to the floor 20. The first radiating branch 110 and the second radiating branch 120 are alternately connected, and the first grounding point is located on the first radiating branch 110 at one end of the radiating section 100, and the second grounding point is located on the first radiating branch 110 at the other end of the radiating section 100. The first radiating branch 110 has a power supply point, and the distance between the first radiating branch 110 and the floor 20 is less than the distance between the first radiating branches 110 on both sides of the first radiating branch 110 and the floor 20, so that the first radiating branch 110 and the second radiating branches 120 on both sides and the first radiating branch 110 form a first groove-shaped gap 300.

[0047] Based on the fact that the first radiating branch 110 extends parallel to the floor 20 and the second radiating branch 120 extends perpendicular to the floor 20, when the radiating section 100 is excited by a feeding signal, the first radiating branch 110 mainly generates current in the direction parallel to the floor 20, and the second radiating branch 120 mainly generates current in the direction perpendicular to the floor 20. It should be noted that the extension of the first radiating branch 110 parallel to the floor 20 can be understood as the entire branch approaching or being completely parallel to the floor 20; similarly, the extension of the second radiating branch 120 perpendicular to the floor 20 can be understood as the entire branch approaching or being completely perpendicular to the floor 20.

[0048] Furthermore, based on the alternating connection of the first radiating branch 110 and the second radiating branch 120, one end of the first radiating branch 110 with a feed point is connected to a second radiating branch 120, and the connected second radiating branch 120 is connected to an adjacent first radiating branch 110; the other end of the first radiating branch 110 is connected to another second radiating branch 120, and the connected second radiating branch 120 is connected to an adjacent first radiating branch 110. Therefore, the first slot-shaped gap 300 is formed at least by the first radiating branch 110, two second radiating branches 120 respectively connected to both ends of the first radiating branch 110, and two other first radiating branches 110 respectively connected to the two second radiating branches 120. Figure 1 (Illustrated by a structure forming a first groove-shaped slit 300 with the fewest radial branches), and two other first radial branches 110 have first free ends facing each other to form slit openings.

[0049] Furthermore, since the distance between the first radiating branch 110 and the floor 20 is less than the distance between the first radiating branches 110 adjacent to it on both sides and the floor 20, the opening of the first slot 300 faces upwards, and the feed point is on the side of the first radiating branch 110 closer to the floor 20. This causes the radiating section 100 to generate a current from the feed point in a direction away from the floor 20 during excitation. This current then flows to the floor 20 through other radiating branches on both sides of the first slot 300 and the grounding point of the first radiating branch 110 at the end. Thus, the first current flowing parallel to the floor 20 in the radiating section 100 is cut off, and a second current flowing away from the floor 20 and a third current flowing closer to the floor 20 are introduced. This allows the antenna element 10 to simultaneously generate lateral and longitudinal currents on the floor 20, balancing the current distribution.

[0050] In some embodiments, the first slot 300 is formed by a first radiating branch 110 and a first radiating branch 110 and a second radiating branch 120 on each of the adjacent two sides, and each of the first radiating branches 110 on the adjacent two sides has a first free end. That is, as described above, the first slot 300 is formed by surrounding with the fewest radiating branches to improve the directivity coefficient of the antenna element 10.

[0051] Optionally, such as Figure 3 As shown, the dimensions of the two adjacent second radial branches 120 on both sides of the first radial branch 110 can be the same, thereby making the distance between the two adjacent first radial branches 110 on both sides of the first radial branch 110 and the floor 20 the same. Optionally, as Figure 4 As shown, the dimensions of the two adjacent second radiating branches 120 on both sides of the first radiating branch 110 can be different, thus resulting in different distances between the two adjacent first radiating branches 110 and the ground plane 20. It can be understood that regardless of whether the dimensions of the two adjacent second radiating branches 120 on both sides of the first radiating branch 110 are the same, provided the overall volume of the antenna element 10 is acceptable, the larger the dimensions of the two adjacent second radiating branches 120 on both sides of the first radiating branch 110, the more current is introduced in the direction away from the ground plane 20 and the more current is introduced in the direction closer to the ground plane 20. This results in a higher proportion of longitudinal current generated by the ground plane 20 and a weaker transverse periodic current, thereby lower directivity.

[0052] In some embodiments, such as Figure 5 As shown, the first groove-shaped gap 300 is formed by a first radial branch 110 and a plurality of first radial branches 110 and a plurality of second radial branches 120 on each of the adjacent two sides, and at least two adjacent first radial branches 110 on at least one side each have a first free end. Figure 5(The illustration is based on the example of two adjacent first radial branches 110 on one side each having a first free end, and one first radial branch 110 on the other side having a first free end).

[0053] in, Figure 5 The number of radiating stubs forming the first slot 300 in the antenna element 10 shown is greater than [a certain number]. Figure 1-4 The antenna element 10 shown has a number of radiating branches that form the first slot 300, and at least two adjacent first radiating branches 110 on at least one side each have a first free end. The first free end can be understood as the open end of the radiating part 100. The more first free ends there are, the more the radiating branches that form the first slot 300 are cut into more first radiating branches 110 with open ends, and more current in the direction parallel to the ground plane 20 is cut off, thereby further enhancing the longitudinal current and weakening the transverse periodic current.

[0054] In some embodiments, such as Figure 6 As shown, the radiating section 100 includes a plurality of first radiating branches 110 and a plurality of second radiating branches 120. The first radiating branches 110 extend in a direction parallel to the floor 20, and the second radiating branches 120 extend in a direction perpendicular to the floor 20. The first radiating branches 110 and the second radiating branches 120 are alternately connected, and a first grounding point is located on a first radiating branch 110 at one end of the radiating section 100, and a second grounding point is located on a first radiating branch 110 at the other end of the radiating section 100; wherein, the number of feed points is two. Two adjacent and spaced second radiating branches 120 each have a feed point (the figure shows an example of a feed point connected to the feed source 200 via a feed line). The two second radiating branches 120 are located on the floor 20. The two second radiating branches 120, at least two adjacent first radiating branches 110 of each of the two second radiating branches 120, and the second radiating branches 120 connecting the at least two adjacent first radiating branches 110 are arranged to form a first groove-shaped gap 300.

[0055] Based on the fact that the first radiating branch 110 extends parallel to the floor 20 and the second radiating branch 120 extends perpendicular to the floor 20, when the radiating section 100 is excited by a feeding signal, the first radiating branch 110 mainly generates current in the direction parallel to the floor 20, and the second radiating branch 120 mainly generates current in the direction perpendicular to the floor 20. It should be noted that the extension of the first radiating branch 110 parallel to the floor 20 can be understood as the entire branch approaching or being completely parallel to the floor 20; similarly, the extension of the second radiating branch 120 perpendicular to the floor 20 can be understood as the entire branch approaching or being completely perpendicular to the floor 20.

[0056] Furthermore, based on the alternating connection of the first radiating branch 110 and the second radiating branch 120, the two second radiating branches 120 are disposed on the floor 20. Therefore, the distribution of the radiating branches that form the first groove-shaped gap 300 is as follows: the alternation of radiating branches from the feed point to the first ground point is: one of the two second radiating branches 120, the adjacent first radiating branch 110, the other second radiating branch 120 adjacent to the first radiating branch 110, and so on; the alternation of radiating branches from the feed point to the first ground point is: the other of the two second radiating branches 120, the adjacent first radiating branch 110, the other second radiating branch 120 adjacent to the first radiating branch 110, and so on. The first groove-shaped gap 300 is formed by at least two second radial branches 120, two adjacent first radial branches 110 of each of the two second radial branches 120, and second radial branches 120 connecting the two adjacent first radial branches 110. Figure 6 (Illustrated by a structure forming a first groove-shaped slit 300 with the minimum number of radial branches), and at least two first radial branches 110 on both sides of the first groove-shaped slit 300 have first free ends facing opposite each other to form a slit opening.

[0057] Furthermore, since there are two feed points, each of the two adjacent and spaced second radiating branches 120 has a feed point. The two second radiating branches 120 are located on the floor 20. The alternating connection of the first radiating branch 110 and the second radiating branch 120 results in the slot opening of the first slot 300 facing upwards. This allows the radiating section 100 to generate currents from the feed source 200 to the two feed points, and then through each feed point in a direction away from the floor 20. These currents flow to the floor 20 through other radiating branches on both sides of the first slot 300 and the grounding point of the first radiating branch 110 at the end. As a result, the first current flowing parallel to the floor 20 in the radiating section 100 is cut off, and a second current flowing away from the floor 20 and a third current flowing closer to the floor 20 are introduced. This allows the antenna element 10 to simultaneously generate lateral and longitudinal currents on the floor 20, thus balancing the current distribution.

[0058] Alternatively, please continue to refer to Figure 6Each of the two second radiating branches 120 has a feed point at one end, and the other end of each second radiating branch 120 is connected to the end of the adjacent first radiating branch 110. Therefore, the two feed points are respectively at the ends of the second radiating branches 120. The current flows from the ends of the two second radiating branches 120 in a direction away from the floor 20, and finally flows back to the floor 20 through the two grounding points in a direction closer to the floor 20, forming a circulating current. This introduces more current perpendicular to the floor 20, further improving the uniformity of the lateral and longitudinal current of the floor 20.

[0059] It should be noted that in the above embodiments, the first groove-shaped gap 300 can be a symmetrical gap or an asymmetrical gap; furthermore, when the first groove-shaped gap 300 is a symmetrical gap, such as Figure 7 As shown, the antenna element 10 can be symmetrically arranged about the central axis Z of the first slot 300, thereby making the current generated by the antenna element 10 symmetrically arranged about the central axis. This is beneficial for further achieving a more balanced distribution of the current excited by the antenna element 10 on the ground plane 20, thus reducing the directivity coefficient. It is understood that in other embodiments, the first slot 300 may also be biased towards the end of the antenna element 10 closer to the first grounding point (e.g., ...). Figure 8 (as shown), or biased towards the end of the antenna element 10 near the second grounding point, but this embodiment does not specifically limit this.

[0060] In some embodiments, such as Figure 9 As shown, the distance between at least one other first radial branch 110 and the floor 20 is less than the distance between at least one other first radial branch 110 and the floor 20 of the adjacent first radial branches 110 on both sides. Figure 9 (Taking multiple other radial branches 110 as an example for illustration), such that at least one other first radial branch 110 and the first radial branches 110 adjacent on both sides form a second groove-shaped gap 600, and the first radial branches 110 adjacent on both sides have at least two gap openings facing opposite second free ends and forming a second groove-shaped gap 600 between the two second free ends.

[0061] Since the distance between the at least one other first radiating branch 110 and the floor 20 is less than the distance between the first radiating branches 110 adjacent to it on both sides and the floor 20, the opening of the second slot 600 formed by the at least one other first radiating branch 110 and the first radiating branches 110 adjacent to it on both sides faces upward. This causes the radiating branch forming the second slot 600 to generate a current from near the feed point to away from the feed point when excited. This current flows to the floor 20 through the other radiating branches on the side of the second slot 600 away from the feed point and the grounding point of the first radiating branch 110 at the end. Thus, the first slot 300 and the second slot 600 together cut off the first current flowing in the direction parallel to the floor 20 of the radiating part 100, and introduced the second current flowing away from the floor 20 and the third current flowing closer to the floor 20, so that the antenna element 10 can generate lateral current and more longitudinal current on the floor 20 at the same time, further balancing the current distribution and making it more conducive to reducing the directivity coefficient.

[0062] It is understandable that the more second slots 600 there are, the more second free ends there are, and the more open ends there are, the more current in the direction parallel to the floor 20 will be cut off, thereby further enhancing the longitudinal current and weakening the transverse periodic current.

[0063] In some embodiments, a first radiating branch 110 located at one end of the radiating section 100 has a first end facing away from the first groove 300 and a second end close to the first groove 300. Whether the first end and the second end of the first radiating branch 110 are free ends is not restricted, provided that the radiating section 100 ensures the formation of a first groove 300; for example, as... Figure 1 , 2 As shown in Figure 7-9, the first grounding point can be located at the first end, and the second end can be a free end; or as shown in Figure 7-9. Figure 10 As shown, the first end and the second end can be free ends, and the first grounding point is located between the first end and the second end.

[0064] In some embodiments, the first radiating branch 110 located at the other end of the radiating section 100 has a third end facing away from the first groove 300 and a fourth end close to the first groove 300. Whether the third and fourth ends of the first radiating branch 110 are free ends is not restricted, provided that the radiating section 100 ensures the formation of a first groove 300; for example, as... Figure 1 , 2 As shown in Figure 7-9, the second grounding point can be located at the third end, and the fourth end can be a free end; or as shown in Figure 7-9. Figure 10 As shown, the third and fourth terminals can be free terminals, and the second grounding point is located between the third and fourth terminals.

[0065] In some embodiments, the antenna element 10 of the above embodiments may be a WIFI / BT antenna for supporting the 2.4G band or the 5G band; the WIFI / BT antenna has a small gain and a low directivity coefficient.

[0066] It should be noted that the embodiments of this application can also be applied to other types of antennas to support multiple different frequency bands. For example, the antenna element 10 in the above embodiments can also be a cellular antenna, for example, operating in the 4G / 5G frequency band; the embodiments of this application do not specifically limit this.

[0067] The following is Figure 1 , 2 The structures shown in Figures 7 and related technologies further illustrate the above embodiments:

[0068] Through inventive effort, the inventors discovered that antennas with strong transverse periodic currents exhibit lower directivity, for example, compared to dipole antennas (symmetric dipole antennas, such as...). Figure 11 As shown), asymmetric dipole antenna (e.g.) Figure 12 (As shown) The excitation transverse periodic current is strong, and the directivity coefficient is 2.123 of that of the Dipole antenna (as shown). Figure 13 (As shown) deteriorated to 6.7 dBi (e.g.) Figure 14 (As shown). Meanwhile, through creative work, the inventors discovered that the IFA antenna positioned at the corner of the long side of the entire device has a poor directivity coefficient, reaching 7.0 (as shown). Figure 15 As shown), this is mainly due to the strong transverse periodic current (e.g. Figure 16 (As shown). By adjusting the antenna position to the short side or the middle, the directivity coefficient was only slightly optimized, roughly to 5.23 (e.g.). Figure 17 (As shown). And based on Figure 1 , 2 The structure shown in Figure 7, where the slot antenna simultaneously excites transverse and longitudinal currents, is relatively balanced (e.g., ...). Figure 18 As shown, it should be noted that Figure 18 The improved current distribution can be mainly referenced in the area within the dashed box; other areas have weaker currents and can be disregarded. The directivity coefficient can be optimized to 4.42 (e.g., Figure 19 (As shown). Therefore, the embodiments of this application can reduce the directivity coefficient of the antenna element without being limited by the position of the entire device, greatly increasing the flexibility and feasibility of antenna design.

[0069] This application also provides a communication device, including a floor and an antenna unit as described in the above embodiment. The antenna unit in the communication device is not limited by its position in the whole device and has a low directivity coefficient, making the antenna unit highly flexible. Furthermore, by improving the directivity coefficient, the total radiated power can be effectively increased while meeting the requirements of local regulations.

[0070] The communication equipment can be handheld devices, in-vehicle devices, smart cars, wearable devices, computing devices, customer premises equipment (CPE) or other processing devices connected to a wireless modem, as well as various forms of user equipment (UE) (e.g., mobile phones, tablets), mobile stations (MS), etc. For ease of description, the devices mentioned above are collectively referred to as communication equipment.

[0071] Optionally, the communication device includes a display screen and a middle frame and a rear cover that cover the display screen. The middle frame of the communication device includes a middle plate and a top frame, a bottom frame, and a first side frame and a second side frame located between the top and bottom frames. The top frame, first side frame, bottom frame, and second side frame are connected end-to-end, generally forming a rectangular frame to support and protect the display screen assembly. The connections between the frames can be right-angle connections or rounded transition connections. The radiating portion of the antenna element can be formed on any of the top frame, first side frame, bottom frame, and second side frame.

[0072] The back cover is located on the side of the mid-frame away from the display screen. The back cover can accommodate structures such as a cutout area for the rear camera and a fingerprint recognition module. The edges of the display screen, the various bezels, and the back cover are connected sequentially. An installation space can be formed between the back cover and the display screen to house the mid-plate. The mid-plate can be used to install electronic components such as batteries, motherboards, and camera modules for communication equipment.

[0073] The motherboard can integrate electronic components such as the processor, storage unit, power management module, and baseband chip of the communication device. The motherboard can be a PCB (Printed Circuit Board) or an FPC (Flexible Printed Circuit), and the ground plane in the above embodiment can be the ground layer on the motherboard. Radio frequency (RF) circuitry for processing RF signals can be integrated on the circuit board, as well as controllers for controlling the operation of the communication device. The RF circuitry can be connected to the antenna module 10 involved in this application to support the transmission and reception of RF signals. The RF circuitry includes, but is not limited to, at least one transceiver, power amplifier, low-noise amplifier, duplexer, coupler, etc. Furthermore, the RF circuitry can also communicate wirelessly with networks and other devices.

[0074] Optionally, taking the aforementioned communication device as mobile phone 11 as an example for explanation, specifically, as follows... Figure 20 As shown, the mobile phone 11 may include a memory 21 (which optionally includes one or more computer-readable storage media), a processor 22, a peripheral device interface 23, a radio frequency system 24 (which may include the antenna unit 10 of the above embodiment), and an input / output (I / O) subsystem 26. These components optionally communicate via one or more communication buses or signal lines 29. Those skilled in the art will understand that... Figure 20 The mobile phone 11 shown does not constitute a limitation on the mobile phone and may include more or fewer components than shown, or combine certain components, or have different component arrangements. Figure 20 The various components shown are implemented in hardware, software, or a combination of both, including one or more signal processing and / or application-specific integrated circuits.

[0075] Memory 21 optionally includes high-speed random access memory, and also optionally includes non-volatile memory, such as one or more disk storage devices, flash memory devices, or other non-volatile solid-state memory devices. Exemplary examples include software components stored in memory 21 such as an operating system 211, a communication module (or instruction set) 212, a global positioning system (GPS) module (or instruction set) 213, etc.

[0076] Processor 22 and other control circuits (such as the control circuits in the radio frequency system 24) can be used to control the operation of mobile phone 11. The processor 22 may be based on one or more microprocessors, microcontrollers, digital signal processors, baseband processors, power management units, audio codec chips, application-specific integrated circuits, etc.

[0077] The processor 22 can be configured to implement control algorithms for controlling the use of the antenna in the mobile phone 11. The processor 22 can also issue control commands for controlling various switches in the radio frequency system 24.

[0078] I / O subsystem 26 couples input / output peripherals on mobile phone 11, such as the keypad and other input control devices, to peripheral interface 23. I / O subsystem 26 optionally includes a touchscreen, buttons, a tone generator, an accelerometer (motion sensor), an ambient light sensor and other sensors, light-emitting diodes and other status indicators, a data interface, etc. For example, a user can control the operation of mobile phone 11 by supplying commands via I / O subsystem 26, and can use the output resources of I / O subsystem 26 to receive status information and other outputs from mobile phone 11. For example, a user can press button 261 to turn the phone on or off.

[0079] Any references to memory, storage, databases, or other media used in this application may include non-volatile and / or volatile memory. Suitable non-volatile memory may include read-only memory (ROM), programmable ROM (PROM), electrically programmable ROM (EPROM), electrically erasable programmable ROM (EEPROM), or flash memory. Volatile memory may include random access memory (RM), which is used as external cache memory. By way of illustration and not limitation, RM is available in a variety of forms, such as static RM (SRM), dynamic RM (DRM), synchronous DRM (SDRM), dual data rate SDRM (DDR SDRM), enhanced SDRM (ESDRM), synchronous link DRM (SLDRM), ROMbus direct RM (RDRM), direct memory bus dynamic RM (DRDRM), and memory bus dynamic RM (RDRM).

[0080] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0081] The above embodiments merely illustrate several implementation methods of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of this patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this patent application should be determined by the appended claims.

Claims

1. An antenna element, characterized in that, include: The radiating section has a feed point and a first grounding point and a second grounding point for connection with the floor, respectively. At least a portion of the radiating branches between the first grounding point and the second grounding point of the radiating section are arranged to form a first groove-shaped gap. The portion of the radiating branch has at least a gap opening facing two opposing first free ends and forming the first groove-shaped gap between the two first free ends. The gap opening is located on the side of the portion of the radiating branch away from the floor, and the feed point is located on the side of the portion of the radiating branch closer to the floor. A feed source, connected to the feed point, is used to output a feed signal to excite the radiating part to generate a ring current from the feed point along the first slot-shaped gap and through the first grounding point and the second grounding point to the floor. The radiating section includes multiple first radiating branches and multiple second radiating branches. The first radiating branches extend in a direction parallel to the floor, and the second radiating branches extend in a direction perpendicular to the floor. The first radiating branches and the second radiating branches are alternately connected. The first grounding point is located on the first radiating branch at one end of the radiating section, and the second grounding point is located on the first radiating branch at the other end of the radiating section. The power supply point is located on a first radiating branch. The first radiating branch and the adjacent second radiating branches and first radiating branches on both sides form the first groove-shaped gap.

2. The antenna element according to claim 1, characterized in that, The distance between the first radiating branch and the floor is less than the distance between the first radiating branches on both sides of the first radiating branch and the floor, so that the first radiating branch and the second radiating branches on both sides and the first radiating branch form the first groove-shaped gap.

3. The antenna element according to claim 2, characterized in that, The first groove-shaped gap is formed by the first radial branch and a first radial branch and a second radial branch on each of the adjacent two sides, and each of the first radial branches on the adjacent two sides has the first free end; Alternatively, the first groove-shaped gap is formed by the first radial branch and a plurality of first radial branches and a plurality of second radial branches on each of the adjacent two sides, and at least two adjacent first radial branches on at least one side each have the first free end.

4. The antenna element according to claim 1, characterized in that, The radiating section includes a plurality of first radiating branches and a plurality of second radiating branches. The first radiating branches extend in a direction parallel to the floor, and the second radiating branches extend in a direction perpendicular to the floor. The first radiating branches and the second radiating branches are alternately connected, and the first grounding point is located on the first radiating branch at one end of the radiating section, and the second grounding point is located on the first radiating branch at the other end of the radiating section. The number of the power supply points is two. Each of the two adjacent and spaced second radiating branches has one power supply point. The two second radiating branches are located on the floor. The two second radiating branches, at least two adjacent first radiating branches of each of the two second radiating branches, and the second radiating branches connecting the at least two adjacent first radiating branches form the first groove-shaped gap.

5. The antenna element according to claim 4, characterized in that, Each of the two second radiating branches has the feed point at one end, and the other end of each second radiating branch is connected to the end of the adjacent first radiating branch.

6. The antenna element according to claim 1, characterized in that, The distance between at least another first radiating branch and the floor is less than the distance between the first radiating branches adjacent to each other on both sides of the at least another first radiating branch and the floor, such that the at least another first radiating branch and the first radiating branches adjacent to each other on both sides form a second groove-shaped gap, and the first radiating branches adjacent to each other on both sides have at least two gap openings facing opposite second free ends and forming the second groove-shaped gap between the two second free ends.

7. The antenna element according to any one of claims 2-6, characterized in that, The first radiating branch located at one end of the radiating section has a first end away from the first slot and a second end close to the first slot, the first grounding point is located at the first end, and the second end is a free end; or the first end and the second end are both free ends, and the first grounding point is located between the first end and the second end.

8. The antenna element according to any one of claims 2-6, characterized in that, The first radiating branch located at the other end of the radiating section has a third end away from the first slot and a fourth end close to the first slot, the second grounding point is located at the third end, and the fourth end is a free end; or the third end and the fourth end are both free ends, and the second grounding point is located between the third end and the fourth end.

9. The antenna element according to any one of claims 1-6, characterized in that, The antenna element is symmetrical about the central axis of the first slot.

10. The antenna element according to any one of claims 1-6, characterized in that, The antenna unit is a WIFI / BT antenna, used to support the 2.4G or 5G frequency band.

11. A communication device, characterized in that, include: floor; and The antenna element as described in any one of claims 1-10.

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