Antenna module and electronic equipment

Abstract

The invention relates to an antenna module and electronic equipment, and the antenna module comprises a first radiator and a first feed source, the first radiator receives an excitation signal provided by the first feed source through a first feeding point, and when receiving different excitation signals, the first radiator is excited to generate a first resonant mode and a second resonant mode which correspondingly support an ultrahigh frequency band and a low frequency band, and the first resonant mode and the second resonant mode are used for generating a second resonant mode. Therefore, co-feed of an ultrahigh frequency band and a low frequency band is realized, the bandwidth and efficiency of the antenna are improved, the integration level and the space utilization rate of the antenna are improved, and the cost is reduced.

Description

Technical Field

[0001] The present application relates to the field of antenna technology, and in particular to an antenna module and an electronic device. Background Art

[0002] With the continuous development of communication technology, the trend of miniaturization of electronic equipment is becoming more and more obvious, while the frequency bands that electronic equipment needs to support are becoming wider and wider, so the number of antennas is also increasing, resulting in tight antenna layout space and limited size. Summary of the invention

[0003] The embodiments of the present application provide an antenna module and an electronic device, which can improve the integration of the antenna and reduce the occupied space.

[0004] A first aspect of the present application provides an antenna module, the antenna module comprising:

[0005] A first radiator having a first free end, a first ground end, and a first feeding point located between the first free end and the first ground end;

[0006] A first feed source is connected to the first feeding point, and is used to provide a first excitation signal to the first radiator to excite the first radiator to generate a first resonance mode supporting an ultra-high frequency band; and is also used to provide a second excitation signal to the first radiator to excite the first radiator to generate a second resonance mode supporting a low frequency band.

[0007] A second aspect of the present application provides an electronic device, including:

[0008] floor;

[0009] In the antenna module as described above, each ground terminal is connected to the floor.

[0010] The above-mentioned antenna module and electronic device include a first radiator and a first feed source. The first radiator receives an excitation signal provided by the first feed source through a first feeding point, and when receiving different excitation signals, it can be excited to generate a first resonance mode and a second resonance mode corresponding to supporting ultra-high frequency bands and low frequency bands, thereby realizing co-feeding of ultra-high frequency bands and low frequency bands, improving antenna bandwidth and efficiency, improving antenna integration and space utilization, and reducing costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0012] Figure 1 This is one of the structural block diagrams of an antenna module according to an embodiment of the present application;

[0013] Figure 2 This is one of the structural block diagrams of an antenna module according to an embodiment of the related art;

[0014] Figure 3 This is a second structural block diagram of an antenna module according to an embodiment of the related art;

[0015] Figure 4 This is a second structural block diagram of an antenna module according to an embodiment of the present application;

[0016] Figure 5 This is a third structural block diagram of an antenna module according to an embodiment of the present application;

[0017] Figure 6 This is a fourth structural block diagram of an antenna module according to an embodiment of the present application;

[0018] Figure 7 This is a fifth structural block diagram of an antenna module according to an embodiment of the present application;

[0019] Figure 8 This is a sixth structural block diagram of an antenna module according to an embodiment of the present application;

[0020] Fig. 9 This is a seventh structural block diagram of an antenna module according to an embodiment of the present application;

[0021] Fig.10 This is an eighth structural block diagram of an antenna module according to an embodiment of the present application;

[0022] Fig.11 This is a ninth structural block diagram of an antenna module according to an embodiment of the present application;

[0023] Fig.12 This is a third structural block diagram of an antenna module according to an embodiment of the related art;

[0024] Fig.13 This is a tenth structural block diagram of an antenna module according to an embodiment of the present application;

[0025] Fig.14 This is the eleventh structural block diagram of the antenna module of one embodiment of the present application;

[0026] Fig.15 One of the Smith charts (impedance diagrams) of the antenna module of one embodiment of the present application;

[0027] Fig.16 The second Smith chart (impedance diagram) of the antenna module of one embodiment of the present application;

[0028] Fig.17is an S11 curve diagram of an antenna module according to an embodiment of the present application;

[0029] Fig.18 This is one of the simulation current diagrams of the antenna module of one embodiment of the present application;

[0030] Fig.19 This is the second simulation current diagram of the antenna module of one embodiment of the present application;

[0031] Fig. 20 This is the third simulation current diagram of the antenna module of one embodiment of the present application;

[0032] Fig.21 This is a fourth simulation current diagram of the antenna module of an embodiment of the present application;

[0033] Fig. 22 A system efficiency curve diagram of an antenna module according to an embodiment of the present application;

[0034] Fig.23 This is one of the structural block diagrams of an electronic device in an embodiment of the present application;

[0035] Fig.24 This is the second structural block diagram of an electronic device in an embodiment of the present application. DETAILED DESCRIPTION

[0036] In order to make the purpose, technical solution and advantages of the present application more clearly understood, the present application is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0037] It is understood that the terms "first", "second", etc. used in this application can be used in this article to describe various elements, but these elements are not limited by these terms. These terms are only used to distinguish the first element from another element, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, the features defined as "first" and "second" can explicitly or implicitly include at least one of the features. In the description of this application, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0038] It should be noted that when an element is referred to as being "disposed on" another element, it may be directly on the other element or there may be an intermediate element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be an intermediate element at the same time.

[0039] The antenna module involved in the embodiment of the present application can be applied to electronic devices with wireless communication functions, and the electronic devices can be handheld devices, vehicle-mounted devices, smart cars, wearable devices, computing devices or other processing devices connected to wireless modems, as well as various forms of user equipment (UE) (e.g., mobile phones), mobile stations (MS), etc. For the convenience of description, the above-mentioned devices are collectively referred to as electronic devices.

[0040] Figure 1 This is one of the structural block diagrams of an antenna module of an embodiment, refer to Figure 1 In this embodiment, the antenna module includes: a first radiator 110 and a first feed source S1.

[0041] The first radiator 110 has a first free end (eg Figure 1 Z1 in), the first ground terminal (such as Figure 1 D1 in ), and a first feeding point (such as Figure 1 K1 in the figure); a first feed source S1 is connected to the first feeding point, and is used to provide a first excitation signal to the first radiator 110 to excite the first radiator 110 to generate a first resonance mode supporting an ultra-high frequency band; and is also used to provide a second excitation signal to the first radiator 110 to excite the first radiator 110 to generate a second resonance mode supporting a low frequency band.

[0042] The first feeding point can be connected to the first feed source S1 through a radiating branch, a feed line, etc., and the first grounding end can be connected to the floor through a radiating branch, a grounding line, etc. The first radiator 110 is connected to the first feed source S1 through the first feeding point, and receives the excitation signal provided by the first feed source S1. When receiving different excitation signals, the first radiator 110 can be excited to generate corresponding resonant modes supporting different frequency bands. For example, when the first feed source S1 provides a first excitation signal corresponding to an ultra-high frequency band, the first radiator 110 generates a first resonant mode supporting an ultra-high frequency band under the excitation of the first excitation signal; when the first feed source S1 provides a second excitation signal corresponding to a low frequency band, the first radiator 110 generates a second resonant mode supporting a low frequency band under the excitation of the second excitation signal. Optionally, the ultra-high frequency band may include at least one of the N78 and N79 frequency bands, and the low frequency band may include at least one of the B / N5, B / N8, B / N12, B / N13, B / N14, B / N17, B / N18, B / N19, B / N20, B / N26, and B / N28A frequency bands.

[0043] The first radiator 10 and the first feed source S1 constitute a first antenna. The first radiator 110 realizes co-feeding of the ultra-high frequency band and the low frequency band through a feeding point, so that the first antenna can support the ultra-high frequency band and the low frequency band through one radiator and one feed source, reduce the number of radiators, reduce the occupied area, improve the integration and space utilization of the antenna, and at the same time improve the antenna bandwidth and efficiency.

[0044] In the related art, the frequency ranges of the low-frequency band and the ultra-high-frequency band are quite different. In order to be able to distribute in the above two frequency bands at the same time, more antennas are usually required to be split, resulting in the antenna module occupying more space. Figure 2 The antenna module of the related art shown in the figure, in order to support the low frequency band and the ultra-high frequency band (such as N78), the antenna module usually includes two radiators, one of which is connected to a feed source and supports the transmission of low frequency band signals under the excitation of an excitation signal, and the other radiator is connected to another feed source and supports the transmission of ultra-high frequency band signals under the excitation of an excitation signal. The antenna module occupies a large space. For example, Figure 3 The antenna module of the related technology shown is also designed to support low-frequency bands and ultra-high-frequency bands (such as N78). Although the two radiators in the antenna module share the same ground terminal, the overall radiator is still relatively long and still occupies a large space.

[0045] The antenna module of this embodiment includes a first radiator 110 and a first feed source S1. The first radiator 110 receives an excitation signal provided by the first feed source S1 through a first feeding point, and when receiving different excitation signals, it can be excited to generate a first resonance mode and a second resonance mode corresponding to supporting ultra-high frequency bands and low frequency bands. In this way, different resonance modes are generated by co-feeding a shorter radiator, which can support the transmission of ultra-high frequency band and low frequency band signals, thereby improving the antenna bandwidth and efficiency, improving the antenna integration and space utilization, and reducing costs.

[0046] In one embodiment, the current of the first resonance mode is distributed between the first feeding point and the first ground terminal, and the current of the second resonance mode is distributed between the first free end and the first ground terminal.

[0047] Under the excitation of different excitation signals, the first radiator 110 generates resonance modes with different current distributions on the surface of the first radiator 110, wherein the current of the first resonance mode is mainly distributed between the first feeding point and the first ground end, and the current of the second resonance mode is mainly distributed between the first free end and the first ground end.

[0048] The current distributions of the first resonant mode and the second resonant mode are different. In this embodiment, an excitation signal is fed into the same feeding point to stimulate the first radiator 110 to generate resonances corresponding to the ultra-high frequency band and the low frequency band, so that the first radiator 110 can support the transmission of low frequency band signals and ultra-high frequency band signals through co-feeding.

[0049] It should be noted that, in this embodiment, the current distribution corresponding to the resonant mode can be understood as the distribution of a relatively strong resonant current, but it does not exclude the possibility that the first radiator 110 generates a relatively weak resonant current at other positions under the excitation of the excitation signal. For example, when the first radiator 110 operates in the first resonant mode, a small amount of relatively weak current is also distributed in the radiation branches between the first free end of the first radiator 110 and the first feeding point branches, but the current does not affect the transmission of the UHF band signal.

[0050] In one embodiment, if Figure 4 As shown ( Figure 4 The bold line with an arrow in the figure is used to represent the current direction), and the first resonant mode includes a loop mode (Loop mode) from the first feeding point to the first ground terminal and from the first ground terminal to the first feeding point; Figure 5 As shown ( Figure 5 The bold line with an arrow in the middle is used to represent the current direction), and the second resonant mode includes a quarter-wavelength mode from the first free end to the first ground end.

[0051] When the first feed source S1 provides a first excitation signal, the first excitation signal is fed in from the first feeding point, exciting the first radiator 110 to generate a first current from the first feeding point to the first ground end, and a second current from the first ground end to the first feeding point. The directions of the first current and the second current are opposite, forming a bidirectional circulating current, so that the first radiator 110 operates in a circulating current mode. The circulating current mode has a higher electromagnetic wave receiving and transmitting efficiency at and near the resonant frequency in the ultra-high frequency range to support the transmission of ultra-high frequency band signals.

[0052] When the first feed source S1 provides a second excitation signal, the second excitation signal is fed in from the first feeding point, exciting the first radiator 110 to generate a current from the first feeding point to the first ground end and from the first free end to the first ground end. The overall direction of the current flows from the first free end toward the first ground end, so that the first radiator 110 operates in a quarter-wavelength mode. The quarter-wavelength mode has a higher electromagnetic wave receiving and transmitting efficiency at and near the resonant frequency in the low-frequency range, and supports the transmission of low-frequency band signals.

[0053] In this embodiment, the first radiator 110 is stimulated to generate a circulating current mode and a quarter-wavelength mode, so that the first radiator 110 supports the transmission of low-frequency band and ultra-high-frequency band signals through a co-feeding method.

[0054] It should be noted that, in other embodiments, based on different specific excitation signals, the first radiator 110 can support different ultra-high frequency sub-bands and low frequency sub-bands in the first resonance mode and the second resonance mode; the first radiator 110 can also support other resonance modes to support signal transmission in other frequency bands. For example, the first radiator 110 can also support signal transmission in frequency bands such as wifi2.4G / 5G and GPS L1 / L5. Therefore, the antenna module can support the transmission of signals in more frequency bands through the first radiator 110.

[0055] In one embodiment, if Figure 6 As shown, the antenna module further includes: a second radiator 120 .

[0056] The second radiator 120 has a second free end (such as Z2 in the figure) and a second ground end (such as D2 in the figure), a gap is formed between the second free end and the first free end, and the second ground end is located on the side of the second free end away from the first free end. The second radiator 120 is used to couple with the first radiator 110; wherein the first feed source S1 is also used to provide a third excitation signal to the first radiator 110 to excite the antenna module to generate a third resonant mode, and the frequency bands supported by the third resonant mode are different from the frequency bands supported by the first resonant mode and the second resonant mode, and the current of the third resonant mode is distributed at least in the second radiator 120.

[0057] Among them, the first radiator 110, the second radiator 120 and the first feed source S1 can form a first antenna with parasitic branches. The first radiator 110 can be understood as the main branch of the first antenna, and the second radiator 120 can be understood as a parasitic branch of the first antenna. When the first radiator 110 generates surface current under the excitation of the excitation signal, the second radiator 120 as a parasitic branch is coupled and fed with the first radiator 110 through the gap, and current is also generated on the surface of the second radiator 120.

[0058] For example, when the first radiator 110 is fed with a third excitation signal, the second radiator 120 is fed by coupling with the first radiator 110, and the antenna module generates a third resonant mode. Based on different situations, the current of the third resonant mode can be distributed in the second radiator 120, and can also be distributed in part of the first radiator 110 on the basis of being distributed in the second radiator 120. When the specific current distribution of the third resonant mode is different, the specific frequency band supported is also different.

[0059] The current distribution of the third resonance mode is different from that of the first resonance mode and the second resonance mode, and the supported frequency band is also different from that of the first resonance mode and the second resonance mode. The frequency band supported by the third resonance mode can be understood as a non-ultra-high frequency band higher than the low frequency band. Therefore, the size of the introduced second radiator is relatively small. By introducing the second radiator 120, the antenna composed of the first radiator 110 and the second radiator 120 can support working in multiple current modes on the basis of a relatively small size, so that the antenna module works in multiple frequency bands, thereby improving the antenna bandwidth and efficiency, and the effective utilization of space.

[0060] In one embodiment, the frequency band supported by the third resonance mode includes an intermediate frequency band, such as Figure 7 As shown ( Figure 7 The thick line with an arrow in the middle is used to represent the current direction), the third resonant mode includes a quarter-wavelength mode from the first feeding point to the first free end generated by the first radiator 110 under the excitation of the third excitation signal, and a quarter-wavelength mode from the second free end to the second ground end generated by the coupling of the second radiator 120 and the first radiator 110.

[0061] When the first feed source S1 provides a third excitation signal corresponding to the intermediate frequency band, the third excitation signal is fed in from the first feeding point, exciting the first radiator 110 to generate a current from the first feeding point to the first free end, so that the first radiator 110 operates in a quarter-wavelength mode from the first feeding point to the first free end; at the same time, the second radiator 120 is coupled to the first radiator 110 through the gap, and the second radiator 120 generates a current from the second free end to the second ground end, so that the second radiator 120 operates in a quarter-wavelength mode from the second free end to the second ground end. The two quarter-wavelength modes have a high electromagnetic wave transceiver efficiency at the resonant frequency in the intermediate frequency range and near the resonant frequency to support the transmission of intermediate frequency band signals.

[0062] In this embodiment, the first radiator 110 and the second radiator 120 are excited to jointly generate a quarter-wavelength mode, so that the antenna module can support the transmission of low-frequency band, medium-frequency band and ultra-high-frequency band signals through co-feeding.

[0063] In one embodiment, the frequency band supported by the third resonance mode includes a high frequency band, such as Figure 8 As shown ( Figure 8 The bold line with an arrow in the middle is used to represent the current direction), and the third resonance mode includes a quarter-wavelength mode from the second ground end to the second free end generated by the coupling between the second radiator 120 and the first radiator 110.

[0064] When the first feed source S1 provides a third excitation signal corresponding to the high-frequency frequency band, the third excitation signal is fed from the first feeding point to excite the first radiator 110 to generate a surface current. The second radiator 120 is coupled and fed with the first radiator 110 through the gap, and the second radiator 120 generates a current from the second free end to the second ground end, so that the second radiator 120 operates in a quarter-wavelength mode from the second ground end to the second free end. The quarter-wavelength mode has a higher electromagnetic wave receiving and transmitting efficiency at the resonant frequency in the high-frequency range and near the resonant frequency to support the transmission of high-frequency band signals.

[0065] In this embodiment, the second radiator 120 is excited to generate a quarter-wavelength mode, so that the antenna module can support the transmission of low-frequency band, high-frequency band and ultra-high-frequency band signals through co-feeding.

[0066] In one embodiment, the frequency band supported by the third resonance mode includes a high frequency band and an intermediate frequency band, and the third resonance mode may include the above-mentioned: a quarter-wavelength mode from the first feeding point to the first free end generated by the first radiator 110 under the excitation of the third excitation signal, and a quarter-wavelength mode from the second free end to the second ground end generated by the coupling of the second radiator 120 and the first radiator 110 to support the transmission of intermediate frequency band signals; a quarter-wavelength mode from the second ground end to the second free end generated by the coupling of the second radiator 120 and the first radiator 110 to support the transmission of high frequency band signals. For related descriptions, please refer to the above embodiments, which will not be repeated here.

[0067] When the antenna module works in the third resonance mode, it can support the medium frequency band and the high frequency band at the same time, or it can support the medium frequency band and the high frequency band in time division. By exciting the antenna module to generate the third resonance mode, the antenna module can support the transmission of low frequency band, medium and high frequency band and ultra-high frequency band signals through co-feeding.

[0068] In one embodiment, the first branch between the first ground end and the first feeding point of the first radiator 110 supports an ultra-high frequency band under the excitation of a first excitation signal, the second branch between the first free end and the first ground end of the first radiator 110 supports a low frequency band under the excitation of a second excitation signal, the third branch between the first feeding point and the first free end of the first radiator 110 and the second radiator 120 support an intermediate frequency band under the excitation of a third excitation signal in an intermediate frequency band, and the second radiator 120 supports a high frequency band under the excitation of a third excitation signal in a high frequency band.

[0069] Thus, the first radiator 110 and the second radiator 120 generate multiple resonant modes with different current distributions by co-feeding, which can support the transmission of signals in multiple frequency bands, greatly improve the antenna integration and space utilization, and improve the antenna bandwidth and efficiency. It can be understood that the aforementioned different current distributions can at least include the differences in current flow direction and strong current distribution positions, and this application does not make specific limitations on this.

[0070] In one embodiment, the extension direction of the first radiator 110 is the same as the extension direction of the second radiator 120; the extension size of the second branch is greater than the sum of the extension size of the third branch and the extension size of the second radiator 120; the extension size of the third branch is greater than or equal to the extension size of the second radiator 120. By reasonably setting the branch sizes of the first radiator 110 and the second radiator 120, the antenna module can be placed in a state that is easy to match impedance, so as to facilitate the adjustment of impedance matching and match the impedance of the frequency bands supported by each resonant mode.

[0071] In one embodiment, if Fig. 9 As shown, the antenna module also includes: a matching circuit 130, which is respectively connected to the first feed source S1 and the first feeding point, and is used to adjust the impedance of each excitation signal input by the first feed source S1, so that the antenna module is in an impedance matching state when operating in each frequency band, ensuring maximum power transmission and minimum signal reflection, thereby improving antenna efficiency.

[0072] Optionally, the matching circuit 130 may include matching elements such as capacitors and inductors. When the number of matching elements such as capacitors and inductors is multiple, the matching circuit 130 may include a switching switch to switch the matching element connected between the first feeding point and the first feed source S1, thereby adjusting the matching parameters and achieving different degrees of impedance matching through different matching parameters.

[0073] Optionally, in combination with the previous embodiment, by reasonably setting the branch sizes of the first radiator 110 and the second radiator 120, the antenna module is in a state that is easy to impedance match, and impedance matching can be achieved through a small number of matching elements, for example, through a capacitor connected in series between the first feeding point and the first feed source S1.

[0074] Optionally, in other embodiments, matching elements may be added between the first ground terminal, the second ground terminal and the floor, so that the antenna module is in an impedance matching state when operating in each frequency band. For example, impedance matching is achieved by returning to the ground through a capacitor, an inductor, or a 0Ω return to the ground, which will not be introduced in detail in this embodiment.

[0075] In one embodiment, if Fig.10 , Fig.11As shown, the antenna module further includes: a third radiator 140 and a second feed source S2.

[0076] The third radiator 140 has a second free end (Z2 in the figure), a second ground end (D2 in the figure), and a second feeding point (K2 in the figure) located between the second free end and the second ground end; the second feed source S2 is connected to the second feeding point, and is used to provide a fourth excitation signal to the third radiator 140 to excite the third radiator 140 to generate a fourth resonant mode supporting an ultra-high frequency band; and is also used to provide a fifth excitation signal to the first radiator 110 to excite the third radiator 140 to generate a fifth resonant mode supporting a frequency band different from the ultra-high frequency band and the low frequency band.

[0077] Among them, the third radiator 140 and the second feed source S2 can be combined to form a second antenna. The third radiator 140 is connected to the second feed source S2 through the second feeding point, and receives the fourth excitation signal and the fifth excitation signal provided by the second feed source S2, and can generate a fourth resonance mode and a fifth resonance mode accordingly. The fourth resonance mode can support an ultra-high frequency band, and the fifth resonance mode can support other frequency bands besides the ultra-high frequency band and the low frequency band. Therefore, the second antenna can support the transmission of signals in multiple frequency bands.

[0078] The antenna module of this embodiment, by introducing a second antenna, can further support signal transmission of dual ultra-high frequency bands + low frequency bands + other frequency bands, while effectively improving the integration of the radiator and space utilization, supporting more frequency bands and further improving bandwidth and efficiency.

[0079] In addition, compared to Figure 3 The antenna module (eg, Fig.12 As shown, it is only an example and does not mean that the two are easy to combine). The antenna module of this embodiment also has a higher dual-UHF de-isolation effect (taking the N78 frequency band as an example below):

[0080] like Fig.12 As shown, in the related art, the free end of the radiator supporting N78 in the first antenna faces the free end of the third radiator 140 supporting N78 in the second antenna. When the two antennas work at the same frequency of N78, the same-frequency isolation of N78 is poor because the two antennas are adjacent and their openings are opposite. In order to achieve the de-isolation of the antennas at the same frequency and improve the antenna radiation efficiency, it is necessary to increase the distance between the two antennas back to the ground. However, although increasing the distance between the two antennas back to the ground improves the isolation, it takes up more space and is not conducive to miniaturization.

[0081] like Fig.10As shown, the radiator of N78 is integrated into the first radiator 110, and the first radiator 110 is co-fed to support N78 and the low frequency band. Since the opening of the first radiator 110 is far away from the opening of the third radiator 140, the same-frequency isolation of N78 is improved, which is conducive to the de-isolation of the first radiator 110 and the fourth radiator 140 when they work at the same frequency as N78. Further, as Fig.13 As shown, even if the distance between the first antenna and the second antenna is increased to further improve the isolation, the overall occupied space after increasing the return distance to the ground is less than Fig.12 The space occupied by the antenna module is shown.

[0082] It should be noted that a matching circuit may also be connected between the second feeding point of the third radiator 140 and the second feed source S2 in the above embodiment to achieve impedance matching; a matching element may also be added between the third ground terminal of the third radiator 140 and the floor to make the antenna module in an impedance matching state when operating in each frequency band. This embodiment will not introduce this one by one, and the relevant description of the above embodiment may be referred to.

[0083] The above embodiment is further explained by a specific optional embodiment of the present application as follows:

[0084] like Fig.14 As shown, the highly integrated antenna module supporting LB+MHB+UHB in this embodiment, in order to make the antenna module easier to match, the optional sizes of each branch are reasonably set, and the impedance matching of each frequency band can be achieved by only one capacitor C. For specific size information, please refer to Fig.14 , Fig.15 , Fig.16 The Smith chart before capacitor matching and the Smith chart after impedance matching through a capacitor are shown respectively. Fig.15 As shown, through reasonable size setting, the antenna module is in an easy-to-match state before impedance matching, such as Fig.16 As shown in the figure, after only one capacitor is matched, the matching of LB+MHB+UHB is achieved. The corresponding standing wave S11 parameter curve after matching is as follows Fig.17 shown.

[0085] Figure 18-Figure 21 The simulation test diagram of the antenna module of this embodiment is shown as follows: Fig.18 As shown, the antenna module can support a quarter-wavelength mode from the first free end to the first ground end to transmit LB band signals; Fig.19 As shown, the antenna module can support a quarter-wavelength mode from the first feeding point to the first free end, and a quarter-wavelength mode from the second free end to the second ground end to transmit MB band signals; Fig. 20As shown, the antenna module can support a quarter-wavelength mode from the second ground end to the second free end to transmit HB band signals; Fig.21 As shown, the antenna module can support a loop mode from the first feeding point to the first ground terminal to transmit UHB band signals. After simulation current analysis, the current mode of the antenna module is relatively rich, and each current mode supports the antenna module to work in various frequency bands, thereby improving the antenna bandwidth and efficiency.

[0086] like Fig. 22 As shown, the antenna module can be adjusted to different impedance matching states by setting switches and multiple capacitor switching matching parameters, and matching can be performed in more specific sub-bands of LB+MHB+UHB to achieve more complete frequency band coverage.

[0087] The antenna module of this embodiment can support multiple frequency bands such as LB+MHB+UHB on the basis of effective use of space, improve antenna bandwidth and efficiency, improve antenna integration and space utilization, and reduce costs.

[0088] It should be noted that in the above embodiments, the first free end and the second free end can be understood as open ends, open circuit ends, and open ends, and the free ends are not electrically connected to other conductors; the first grounding end and the second grounding end are used to couple to the floor. The aforementioned "ends" can be understood as ends on the radiating branch, or as a section of the radiating branch including the ends. The first feeding point and the second feeding point can be understood as connection points on the radiator that are coupled to the feed source.

[0089] The present application also provides an electronic device, including a floor and an antenna module in any one of the above embodiments or a combination of multiple embodiments, wherein each ground terminal is connected to the floor. The antenna module in the electronic device has a simple structure, high isolation, and high radiation efficiency, which is conducive to improving the communication function of the electronic device.

[0090] In one of the embodiments, the electronic device further includes: a middle frame.

[0091] like Fig.23As shown, the middle frame includes a middle plate 210 and a top frame 221, a first side frame 223, a bottom frame 222 and a second side frame 224 which are connected in sequence from beginning to end around the side of the middle plate, a corner is formed between two adjacent frames, and the middle plate 210 forms a floor (not shown in the figure); wherein, the first radiator and the second radiator in the above embodiment can be arranged on the same side frame, and the third radiator in the above embodiment can be arranged on the top frame (the antenna module is not shown in the figure). Further optionally, the antenna module can be arranged at the corner between the top frame 221 and the second side frame 224. By setting the antenna module at the corner of the frame, it is not only beneficial to the radiation efficiency of the antenna module, but also beneficial to prevent the influence of the radiation of the antenna module when the electronic device is held by the user. Optionally, the middle frame can be formed by any achievable process, such as CNC L-shaped splicing, CNC die-casting, MDA, etc.

[0092] Among them, the middle plate 210 can be used to install electronic components such as batteries, main boards, and camera modules of electronic devices. The main board can integrate electronic components such as processors, storage units, power management modules, and baseband chips of electronic devices. The main board can be a PCB (Printed Circuit Board) or an FPC (Flexible Printed Circuit), and the floor in the above embodiment can be a metal floor on the main board, thereby providing a grounding surface. Part of the RF circuit for processing RF signals can be integrated on the circuit board, and a controller that can control the operation of the electronic device can also be integrated.

[0093] like Fig.24 As shown, further, the above electronic device is taken as a mobile phone 11 as an example for explanation, specifically, Fig.24 As shown, the mobile phone 11 may include a memory 21 (which may optionally include one or more computer-readable storage media), a processor 22, a peripheral device interface 23, a radio frequency system 24, and an input / output (I / O) subsystem 26. These components may communicate via one or more communication buses or signal lines 29. Those skilled in the art will appreciate that Fig.24 The illustrated mobile phone 11 does not constitute a limitation of the mobile phone, and may include more or fewer components than shown in the figure, or combine certain components, or arrange the components differently. Fig.24 The various components shown in the EMBODIMENTS 2000 are implemented in hardware, software, or a combination of hardware and software, including one or more signal processing and / or application specific integrated circuits.

[0094] The memory 21 optionally includes a high-speed random access memory, and optionally also includes a non-volatile memory, such as one or more disk storage devices, flash memory devices, or other non-volatile solid-state memory devices. Exemplarily, the software components stored in the memory 21 include an operating system 211, a communication module (or an instruction set) 212, a global positioning system (GPS) module (or an instruction set) 213, etc.

[0095] The processor 22 and other control circuits may be used to control the operation of the handset 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, and the like.

[0096] The processor 22 may be configured to implement a control algorithm for controlling the use of an antenna in the handset 11. The processor 22 may also issue control commands for controlling switches in the radio frequency system 24, etc.

[0097] The I / O subsystem 26 couples input / output peripherals on the mobile phone 11, such as a keypad and other input control devices, to the peripheral device interface 23. The I / O subsystem 26 optionally includes a touch screen, buttons, tone generators, accelerometers (motion sensors), ambient light sensors and other sensors, light emitting diodes and other status indicators, data ports, etc. Exemplarily, a user can control the operation of the mobile phone 11 by supplying commands via the I / O subsystem 26, and can use the output resources of the I / O subsystem 26 to receive status information and other output from the mobile phone 11. For example, a user can press button 261 to turn the mobile phone on or off.

[0098] Any reference to memory, storage, database 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 an external cache memory. As an illustration and not limitation, RM is available in various forms, such as static RM (SRM), dynamic RM (DRM), synchronous DRM (SDRM), double data rate SDRM (DDR SDRM), enhanced SDRM (ESDRM), synchronous link (Synchlink) DRM (SLDRM), memory bus (Rmbus) direct RM (RDRM), direct memory bus dynamic RM (DRDRM) and memory bus dynamic RM (RDRM).

[0099] The technical features of the above embodiments may be combined arbitrarily. To make the description concise, 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.

[0100] The above embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the present application. It should be pointed out that, for a person of ordinary skill in the art, several modifications and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the present application shall be subject to the attached claims.

Claims

1. An antenna module, characterized in that: The antenna module comprises: A first radiator having a first free end, a first ground end, and a first feeding point located between the first free end and the first ground end; A first feed source is connected to the first feeding point, and is used to provide a first excitation signal to the first radiator to excite the first radiator to generate a first resonance mode supporting an ultra-high frequency band; and is also used to provide a second excitation signal to the first radiator to excite the first radiator to generate a second resonance mode supporting a low frequency band.

2. The antenna module according to claim 1, characterized in that: The current of the first resonance mode is distributed between the first feeding point and the first grounding end, and the current of the second resonance mode is distributed between the first free end and the first grounding end.

3. The antenna module according to claim 1, characterized in that: The first resonance mode includes a circulating current mode from the first feeding point to the first ground end and from the first ground end to the first feeding point respectively; the second resonance mode includes a quarter-wavelength mode from the first free end to the first ground end.

4. The antenna module according to claim 1, characterized in that: The antenna module also includes: a second radiator, having a second free end and a second ground end, a gap being formed between the second free end and the first free end, the second ground end being located at a side of the second free end away from the first free end, and the second radiator being used to couple with the first radiator; Among them, the first feed source is also used to provide a third excitation signal to the first radiator to excite the antenna module to generate a third resonant mode. The frequency band supported by the third resonant mode is different from the frequency bands supported by the first resonant mode and the second resonant mode, and the current of the third resonant mode is distributed at least in the second radiator.

5. The antenna module according to claim 4, characterized in that: The frequency band supported by the third resonant mode includes an intermediate frequency band, and the third resonant mode includes a quarter-wavelength mode from the first feeding point to the first free end generated by the first radiator under the excitation of the third excitation signal, and a quarter-wavelength mode from the second free end to the second ground end generated by the coupling of the second radiator and the first radiator.

6. The antenna module according to claim 4, characterized in that: The frequency band supported by the third resonance mode includes a high frequency band, and the third resonance mode includes a quarter-wavelength mode from the second ground end to the second free end generated by the coupling of the second radiator and the first radiator.

7. The antenna module according to claim 4, characterized in that: The first branch between the first ground end and the first feeding point of the first radiator supports an ultra-high frequency band under the excitation of the first excitation signal, the second branch between the first free end and the first ground end of the first radiator supports a low frequency band under the excitation of the second excitation signal, the third branch between the first feeding point and the first free end of the first radiator and the second radiator support an intermediate frequency band under the excitation of a third excitation signal in an intermediate frequency band, and the second radiator supports a high frequency band under the excitation of a third excitation signal in a high frequency band.

8. The antenna module according to claim 7, characterized in that: The extending direction of the first radiator is the same as the extending direction of the second radiator; An extension dimension of the second branch node is greater than a sum of an extension dimension of the third branch node and an extension dimension of the second radiator; An extension dimension of the third branch is greater than or equal to an extension dimension of the second radiator.

9. The antenna module according to any one of claims 1 to 8, characterized in that: The antenna module also includes: The matching circuit is connected to the first feed source and the first feeding point respectively, and is used to adjust the impedance of each excitation signal input by the first feed source so that the antenna module is in an impedance matching state when operating in each frequency band.

10. The antenna module according to any one of claims 1 to 8, characterized in that: The antenna module also includes: A third radiator having a second free end, a second ground end, and a second feeding point located between the second free end and the second ground end; A second feed source is connected to the second feeding point, and is used to provide a fourth excitation signal to the third radiator to excite the third radiator to generate a fourth resonance mode supporting an ultra-high frequency band; and is also used to provide a fifth excitation signal to the first radiator to excite the third radiator to generate a fifth resonance mode supporting a frequency band different from the ultra-high frequency band and the low frequency band.

11. An electronic device, characterized in that: include: floor; According to the antenna module as described in any one of claims 1 to 10, each ground terminal is connected to the floor.

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