Antenna assemblies, communication equipment and matching control methods

Abstract

This application relates to an antenna assembly, communication device, and matching control method. Based on the switching of impedance and tuning states of the first and second matching circuits, on the one hand, the radiating element can achieve multi-band coverage, widening the antenna bandwidth while reducing the number of antennas used and reducing the area occupied by the antenna assembly. On the other hand, a smaller radiating element can be selected according to the electrical length requirements when the radiating element operates in non-low frequency bands, thereby achieving miniaturization of the antenna assembly and further reducing the space occupied by the antenna assembly. Therefore, the antenna assembly provided in this embodiment, under the condition of limited antenna space, can reduce the number of antennas and significantly reduce the spatial size of the antenna, achieving miniaturization on the basis of multi-band coverage.

Description

Technical Field

[0001] This application relates to the field of antenna technology, and in particular to an antenna assembly, communication device and matching control method. Background Technology

[0002] With the continuous development of communication technology, the trend of miniaturization of communication equipment is becoming more and more obvious. However, the frequency bands that communication equipment needs to support are becoming wider and wider. As a result, the number of antennas is also increasing, leading to tight antenna layout space, size limitations, and the problem of sacrificing antenna performance. Summary of the Invention

[0003] This application provides an antenna assembly, a communication device, and a matching control method, which can achieve antenna miniaturization and reduce space occupation while being compatible with more frequency bands of communication.

[0004] The first aspect of this application provides an antenna assembly, including:

[0005] The radiating element has a first feed point and a second feed point arranged at intervals;

[0006] The first matching circuit is connected to the first feed source and the first feed point of the radiation unit, respectively.

[0007] The second matching circuit is connected to the second feed source and the second feed point of the radiation unit, respectively.

[0008] When the second matching circuit is in the first impedance state, the first matching circuit is in the inductive tuning state to resonate and adjust the first feed signal input from the first feed source, so that the radiating unit operates in the low frequency band under the excitation of the first feed signal.

[0009] When the first matching circuit is in the second impedance state, the second matching circuit is in the capacitive tuning state to resonate and adjust the second feed signal input from the second feed source, so that the radiating unit operates in the non-low frequency band under the excitation of the second feed signal, and the first impedance is greater than the second impedance.

[0010] A second aspect of this application provides a communication device, comprising:

[0011] The antenna assembly as described above.

[0012] A third aspect of this application provides a matching control method applied to the antenna assembly or the communication device described above, the matching control method comprising:

[0013] When the target operating frequency band of the antenna assembly is a low frequency band, the first matching circuit is controlled to be in an inductive tuning state and the second matching circuit is controlled to be in a first impedance state, so that the first matching circuit resonates and adjusts the first feed signal input from the first feed source, and the radiating element operates in the low frequency band under the excitation of the first feed signal.

[0014] When the target operating frequency band of the antenna assembly is a non-low frequency band, the first matching circuit is controlled to be in the second impedance state, and the second matching circuit is controlled to be in the capacitive tuning state, so that the second matching circuit resonates and adjusts the second feed signal input by the second feed source, and the radiating unit operates in the non-low frequency band under the excitation of the second feed signal.

[0015] The aforementioned antenna assembly, communication equipment, and matching control method, based on the switching of impedance and tuning states of the first and second matching circuits, enable the radiating element to achieve multi-band coverage, broadening the antenna bandwidth while reducing the number of antennas used and decreasing the area occupied by the antenna assembly. Furthermore, it allows for the selection of smaller radiating elements based on their electrical length requirements when operating in non-low-frequency bands, thus miniaturizing the antenna assembly and further reducing its space requirements. Therefore, the antenna assembly provided in this embodiment, under space constraints, can reduce both the number of antennas and significantly reduce the antenna's spatial size. Taking the mid-to-high frequency band as an example, the antenna size can be reduced to approximately 20mm, achieving miniaturization while maintaining multi-band coverage. Attached Figure Description

[0016] 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.

[0017] Figure 1 This is one of the structural block diagrams of an antenna assembly according to an embodiment;

[0018] Figure 2 This is a second structural block diagram of an antenna assembly according to one embodiment;

[0019] Figure 3 This is the third structural block diagram of an antenna assembly according to one embodiment;

[0020] Figure 4 This is a structural block diagram of an antenna assembly in a related technology;

[0021] Figure 5This is the fourth structural block diagram of an antenna assembly according to one embodiment;

[0022] Figure 6 This is the fifth structural block diagram of an antenna assembly according to one embodiment;

[0023] Figure 7 This is the sixth structural block diagram of an antenna assembly according to one embodiment;

[0024] Figure 8 The seventh structural block diagram of an antenna assembly according to one embodiment;

[0025] Figure 9 One of the circuit diagrams of an antenna assembly according to an embodiment;

[0026] Figure 10 Eighth structural block diagram of an antenna assembly according to one embodiment;

[0027] Figure 11 This is a second circuit diagram of an antenna assembly according to one embodiment;

[0028] Figure 12 for Figure 9 , Figure 11 The S11 curve of the antenna assembly shown;

[0029] Figure 13 This is a structural block diagram of a communication device in one embodiment;

[0030] Figure 14 This is a flowchart of a matching control method in one embodiment. Detailed Implementation

[0031] 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.

[0032] It is understood that the terms "first," "second," etc., used in this application may be used herein 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. 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 intervening element present.

[0033] The antenna components described in this application can be applied to communication devices with wireless communication capabilities. These communication devices can be handheld devices, in-vehicle devices, smart cars, wearable devices, computing devices, or other processing devices connected to a wireless modem, as well as various forms of user equipment (UE) (e.g., mobile phones), mobile stations (MS), etc. For ease of description, the devices mentioned above are collectively referred to as communication devices.

[0034] Figure 1 This is a structural block diagram of an antenna assembly according to one embodiment, with reference to... Figure 1 In this embodiment, the antenna assembly includes a radiating element 10, a first matching circuit 20, and a second matching circuit 30.

[0035] The radiating unit 10 has a first feed point K1 and a second feed point K2 spaced apart. A first matching circuit 20 is connected to the first feed source S1 and the first feed point K1 of the radiating unit 10, respectively. A second matching circuit 30 is connected to the second feed source S2 and the second feed point K2 of the radiating unit 10, respectively. When the second matching circuit 30 is in a first impedance state, the first matching circuit 20 is in an inductive tuning state to resonate and adjust the first feed signal input to the first feed source S1, so that the radiating unit 10 operates in the low-frequency band under the excitation of the first feed signal. When the first matching circuit 20 is in a second impedance state, the second matching circuit 30 is in a capacitive tuning state to resonate and adjust the second feed signal input to the second feed source S2, so that the radiating unit 10 operates in the non-low-frequency band under the excitation of the second feed signal, and the first impedance is greater than the second impedance.

[0036] In this configuration, the first feed point K1 of the radiating element 10 is connected to the first feed source S1 via the first matching circuit 20, and the second feed point K2 is connected to the second feed source S2 via the second matching circuit 30. The first feed source S1 and the second feed source S2 are respectively used to output the first feed signal and the second feed signal to the radiating element 10. When the antenna assembly is applied to a communication device, and the communication device includes multiple frames connected end to end, the radiating element 10 can be located entirely on one frame of the communication device, or it can be located simultaneously on two adjacent frames of the communication device, i.e., at the corner of the frame of the communication device (e.g., at the corner of the frame of the communication device). Figure 2 As shown, 40 is the middle plate of the communication device, and multiple frames connected end to end are arranged around the middle plate. The first feed source S1 and the second feed source S2 can be respectively set on the main board of the communication device.

[0037] The first impedance is greater than the second impedance. The first impedance can be understood as a high impedance, with a relatively large input and output impedance. Therefore, the state of the first impedance can be understood as a high impedance state, which is equivalent to an open circuit state. The second impedance can be understood as a low impedance, with a relatively small input and output impedance. Therefore, the state of the second impedance can be understood as a low impedance state, which is equivalent to a short circuit state.

[0038] The inductive tuning state can be understood as the presence of an inductive device, such as an inductor, in the path between the first matching circuit 20 and the first feed point K1. This inductor is equivalent to the distributed inductance of the radiating unit 10 itself (e.g., Figure 3 As shown, Figure 3 For the sake of a simplified equivalent diagram to illustrate the presence of the distributed inductor L01, it is equivalent to the lumped device inductance (such as...). Figure 3 As shown in the diagram (to illustrate the presence of the lumped inductor L02), the actual size of the radiating element 10 can be reduced while effectively increasing the electrical length of the radiating element, facilitating the installation and layout of the antenna assembly, and also effectively reducing costs. The capacitive tuning state can be understood as the presence of a capacitive device, such as a capacitor, in the path between the second matching circuit 30 and the second feed point K2, thereby enabling capacitive coupling feeding of the radiating element 10.

[0039] When the second matching circuit 30 is in a high-impedance state, it is equivalent to the second matching circuit 30 being in an open-circuit state. This means that the second matching circuit 30 disconnects the connection between the second feed source S2 and the second feed point K2. At this time, the first matching circuit 20 is in an inductive tuning state. On the one hand, it can adjust the impedance of the first feed signal input to the first feed source S1. On the other hand, based on the presence of the inductive device, it can adjust the resonant frequency of the radiating element 10 and increase the electrical length of the radiating element while maintaining a preset size, so that the radiating element operates in the low-frequency band under the excitation of the first feed signal. Thus, a radiating element 10 with a smaller actual size can be selected. Through the matching and tuning of the first matching circuit 20, a larger electrical length can be achieved. Subsequently, while shortening the actual size of the radiating element 10, the radiating element 10 can achieve the electrical length required for the low-frequency band, realizing the miniaturization of the antenna assembly.

[0040] When the first matching circuit 20 is in a low-impedance state, it is equivalent to the first matching circuit 20 being in a short-circuit ground state, which is equivalent to the first feed point K1 being connected to the ground. At this time, the second matching circuit 30 is in a capacitive tuning state. On the one hand, it can adjust the impedance of the second feed signal input to the second feed source S2, and on the other hand, it can adjust the resonant frequency of the radiating element 10 so that the radiating element operates in the non-low frequency band under the excitation of the second feed signal. Optionally, the non-low frequency band is larger than the low frequency band. The higher the frequency band, the smaller the required electrical length. The electrical length when operating in the non-low frequency band is smaller than the electrical length of the radiating element 10 when operating in the low frequency band. A smaller radiating element 10 can be selected according to the electrical length requirement when the radiating element 10 operates in the non-low frequency band to achieve miniaturization of the antenna assembly and further reduce the space occupied by the antenna assembly.

[0041] Optionally, the non-low frequency band includes at least one of the mid-frequency band, high-frequency band, and ultra-high-frequency band. By switching the impedance and tuning states of the first matching circuit 20 and the second matching circuit 30, the radiating element 10 can operate in a certain low-frequency band or a non-low-frequency band. Furthermore, based on parameter adjustments of the first matching circuit 20 and the second matching circuit 30, the antenna assembly can simultaneously cover multiple frequency bands in a certain state, realizing carrier aggregation (CA) functionality. For example, it can simultaneously cover multiple sub-band signals in a low-frequency band, or simultaneously cover multiple sub-band signals in a non-low-frequency band, or simultaneously cover a portion of low-frequency sub-bands and a portion of non-low-frequency sub-bands. The division of low-frequency bands, mid-frequency bands, high-frequency bands, and ultra-high-frequency bands for 4G LTE and 5G NR can be referenced in the table below.

[0042]

[0043] It is understood that in other embodiments, the embodiments of this application are not limited to implementing low-frequency bands, mid-frequency bands, high-frequency bands and ultra-high-frequency bands of 4G LTE and 5G NR, and can also be adapted to GPS / WiFi and other frequency bands based on the adjustment of the specific parameters of the first matching unit and the second matching unit.

[0044] In related technologies, such as Figure 4 As shown, this antenna assembly includes an LB antenna and an MHB antenna, both with CRLH mode main stubs. 1 is the feed point of the LB antenna, 2 is the LB antenna switch used to switch between different LB bands, 3 is the feed point of the MHB antenna, and 4 is the parasitic stub of the MHB antenna. This antenna assembly occupies a significant amount of top space, with an antenna size exceeding 30mm.

[0045] In this embodiment, by switching the impedance and tuning states of the first matching circuit 20 and the second matching circuit 30, multi-band coverage can be achieved based on the same radiating element 10, widening the antenna bandwidth while reducing the number of antennas used and decreasing the area occupied by the antenna assembly. Furthermore, a smaller radiating element 10 can be selected based on the electrical length requirements when operating in non-low frequency bands, thereby miniaturizing the antenna assembly and further reducing its space requirements. Therefore, the antenna assembly provided in this embodiment, under space constraints, can reduce both the number of antennas and the spatial size of the antenna. Taking the mid-to-high frequency band as an example, the antenna size can be reduced to approximately 20mm, achieving miniaturization while maintaining multi-band coverage.

[0046] In one embodiment, the radiating unit 10 has a first end and a second end, a first feed point K1 located at the first end, and a second feed point K2 located between the first end and the second end; wherein, when the first matching circuit 20 is in an inductive tuning state and the second matching circuit 30 is in a first impedance state, the radiating unit operates in monopole mode to support the transmission and reception of low-frequency band signals; when the first matching circuit 20 is in a second impedance state and the second matching circuit 30 is in a capacitive tuning state, the radiating unit 10 operates in IFA mode or CRLH mode to support the transmission and reception of non-low-frequency band signals.

[0047] The first feed point K1 and the second feed point K2 are spaced apart, and the first feed point K1 is located at the first end of the radiating unit 10. Therefore, the second feed point K2 being located between the first end and the second end can include the second feed point K2 being located at the second end, or the second feed point K2 being located at any position between the first end and the second end that is spaced apart from the first end.

[0048] When the first matching circuit 20 is in an inductively tuned state and the second matching circuit 30 is in a first impedance state, the first end of the radiating element 10 is connected to the first feed source S1 through the first matching circuit 20, and the second end of the radiating element 10 is in an open-circuit state. Therefore, the first feed signal output by the first feed source S1 excites the radiating element 10 to operate in the first impedance state under the inductive tuning of the first matching circuit 20. Figure 5 The monopole mode shown supports the transmission and reception of low-frequency signals.

[0049] When the first matching circuit 20 is in a second impedance state (i.e., a short-circuit to ground state) and the second matching circuit 30 is in a capacitive tuning state, the first end of the radiating unit 10 is connected to ground through the first matching circuit 20, and the second end or any position between the first and second ends is capacitively coupled and fed through the second matching circuit 30. Specifically, when the second feed point K2 is at the second end, the second feed signal output by the second feed source S2 excites the radiating unit 10 to be in a state such that, under the capacitive tuning of the second matching circuit 30, it is in a state where... Figure 6 In the CRLH mode shown, when the second feed point K2 is located at a position other than the second end, the second feed signal output by the second feed source S2 excites the radiating unit 10 under the capacitive tuning of the second matching circuit 30. Figure 7 The IFA pattern shown.

[0050] Therefore, the antenna assembly provided in this embodiment can reduce the number of antennas and significantly reduce the spatial size of the antenna when the antenna space is limited, thereby achieving miniaturization on the basis of multi-band coverage. On the other hand, the radiation mode of the radiating element 10 can be switched according to actual needs to further improve the radio frequency performance and wide applicability of the antenna assembly.

[0051] In one embodiment, such as Figure 8 As shown, the first matching circuit 20 includes: a first matching unit 210, a second matching unit 220, and a matching control unit 230.

[0052] A first matching unit 210 has its first terminal connected to a first feed source S1 and its second terminal grounded. A second matching unit 220 has its first terminal connected to the first feed source S1 and its second terminal connected to a first feed point K1. A matching control unit 230 has its first terminal connected to both the first terminal of the first matching unit 210 and the first terminal of the second matching unit 220, and its multiple second terminals connected to the second terminals of the first matching unit 210 and the first feeding point K1, respectively. The two ends are connected accordingly; wherein, when the matching control unit 230 controls the first feed source S1 to be connected to the first matching unit 210 and the second matching unit 220 respectively, and the first feed point K1 is connected to the second matching unit 220, the first matching unit 210 and the second matching unit 220 are respectively in an inductive tuning state and are used together to resonate and adjust the first feed signal; when the matching control unit 230 controls the first feed source S1 and the first matching unit 210 to be in a short-circuit state to ground, the first matching unit 210 and the second matching unit 220 are respectively in a second impedance state.

[0053] The matching control unit 230 is connected to the first matching unit 210 and the second matching unit 220, respectively. It can control the connection relationship between the first matching unit 210 and the second matching unit 220 and the first feed source S1 and the first feed point K1, respectively. It can also control the operating state of the first matching unit 210 and the second matching unit 220. The connection relationship includes a connected state and a ground short-circuit state; the operating state includes an impedance state and an inductive tuning state.

[0054] When the matching control unit 230 controls the first matching unit 210 to be connected to the first feed S1 and the second matching unit 220, and the second matching unit 220 to be connected to the first feed point K1 and the first matching unit 210 respectively, on the one hand, since the first matching unit 210 is in an inductive tuning state and one end of the first matching unit 210 is grounded, a first inductive path is formed between the first feed S1 and the ground, and a second inductive path is formed between the first feed S1 and the first feed point K1. On the other hand, the existence of the second inductive path is equivalent to the lumped device inductance of the radiating unit 10, which can replace the equivalent distributed inductance of the radiating unit 10 itself, reducing the actual size of the radiating unit 10. On the other hand, the first inductive path can be used to adjust the resonant bandwidth of the radiating unit 10, and the second inductive path can be used to adjust the resonant frequency of the radiating unit 10. Thus, the two inductive paths can jointly achieve the tuning processing of the first feed S1 signal output by the first feed S1, so that the radiating unit 10 can operate in the low-frequency band of the preset resonant bandwidth with a smaller size, realizing a miniaturized antenna.

[0055] When the matching control unit 230 controls the first feed source S1 and the first matching unit 210 to be in a short-circuit state to ground, the first feed point K1 is equivalent to being connected to the ground terminal, the first matching unit 210 and the second matching unit 220 are in a low impedance state, and the feeding effect of the first feed signal output by the first feed source S1 on the radiation unit 10 approaches zero.

[0056] Therefore, matching and tuning can be achieved through the first matching unit 210, the second matching unit 220, and the matching control unit 230, resulting in a larger electrical length. This allows the radiating element 10 to achieve the electrical length required for the low-frequency band while shortening its actual size, thus miniaturizing the antenna assembly.

[0057] Optionally, the second matching unit 220 may include multiple inductors connected in series. The matching control unit 230 has another portion of its second terminal connected to the node between two adjacent inductors. The matching control unit 230 is also used to control the connection state of each node with the first feed source S1 when the first feed source S1 is connected to both the first matching unit 210 and the second matching unit 220, thereby adjusting the inductance parameters of the second matching unit 220. The parameters of the multiple inductors may be the same or different. By controlling the connection state of different numbers of inductors with the first feed source S1, the matching control unit 230 can control the number of inductors playing a tuning role in the second inductance path between the first feed source S1 and the first feed point K1, thereby adjusting the inductance parameters of the second matching unit 220.

[0058] Optionally, the second matching unit 220 may include one or more inductors connected in series, with the one or more inductors connected to ground, and the matching control unit 230 connected to both ends of the second matching unit 220 respectively.

[0059] Optionally, the matching control unit 230 can be a switching chip. The switching chip is configured with a common terminal and multiple connection terminals. The common terminal of the switching chip is the first terminal of the matching control unit 230, and the multiple connection terminals are multiple second terminals of the matching control unit 230. The switching chip can control the common terminal to connect with any one or more connection terminals to control the connection and operating states of the first matching unit 210 and the second matching unit 220. It can be understood that the number of connection terminals of the switching chip can be adjusted according to the number of inductors in the second matching unit 220.

[0060] like Figure 9 As shown, the first matching unit 210 includes one inductor (L1 in the figure), and the second matching unit 220 includes three inductors connected in series (L2, L3, and L4 in the figure). The switching chip is configured with one common terminal and four connection terminals. By switching the switching chip, the connection state between each inductor in the first inductor path and the ground terminal can be controlled, as well as the value of the inductors connected in series in the second inductor path can be controlled, thereby adjusting the resonant frequency and bandwidth of the radiating unit 10 at low frequencies. Specifically, when RF4 in the switching chip is in the off state, the switching chip can adjust the antenna frequency by switching the states of RF1-3; when RF4 is in the on state, the entire first matching circuit 20 is in a short-circuit ground state, at which time non-low frequency bands, such as the MHB band, can be tuned.

[0061] In one embodiment, such as Figure 10 As shown, the second matching circuit 30 includes a switching unit 310 and a third matching unit 320.

[0062] The third matching unit 320 has its first end connected to the second feed source S2; the switching unit 310 is connected to the third matching unit 320 and the second feed point K2 respectively; wherein, when the switching unit 310 disconnects the connection between the third matching unit 320 and the second feed point K2, the third matching unit 320 is in a first impedance state; when the switching unit 310 connects the connection between the third matching unit 320 and the second feed point K2, the third matching unit 320 is in a capacitive tuning state to resonate and adjust the second feed signal.

[0063] Therefore, the switching state of the switching unit 310 can control the switching of the third matching unit 320 between the first impedance state and the capacitive tuning state. Specifically, when the switching unit 310 is in the off state, the third matching unit 320 is equivalent to being disconnected, the second feed point K2 is in the open circuit state, and the feeding effect of the second feed source S2 on the radiating unit 10 approaches zero. When the switching unit 310 is in the on state, the third matching unit 320 is connected between the second feed source S2 and the second feed point K2 to form a capacitor-inductor path to tune the second feed signal, so that the radiating unit 10 operates in the non-low frequency band under the feeding excitation of the second feed signal.

[0064] Alternatively, please continue to refer to Figure 10 The second matching circuit 30 further includes a fourth matching unit 330. The first end of the fourth matching unit 330 is connected to the switching unit 310 and the third matching unit 320 respectively. The second end of the fourth matching unit 330 is grounded. The fourth matching unit 330 is used to work with the third matching unit 320 to resonate and adjust the second feed signal.

[0065] The first end of the fourth matching unit 330 is connected to the second feed point K2 through the switch unit 310, and the second end of the fourth matching unit 330 is connected to ground. The fourth matching unit 330 can adjust the resonant bandwidth of the radiation unit 10 when the switch unit 310 is in the on state. Thus, the third matching unit 320 and the fourth matching unit together realize the tuning processing of the second feed source S2 signal output by the second feed source S2, so that the radiation unit 10 operates in the non-low frequency band of the preset resonant bandwidth.

[0066] Optionally, the third matching unit 320 may include a capacitor, multiple inductors, and a gating device. The first terminal of the gating device is connected to the first terminal of the capacitor and the switching unit 310, respectively. The multiple second terminals of the gating device are respectively connected to the second terminals of the capacitor and the first terminals of the multiple inductors. The second terminals of each inductor are grounded, and the second terminal of the capacitor is also connected to the second feed source S2. When the switching unit 310 is in the ON state, the gating device controls the connection state between the second feed point K2 and the first terminals of each inductor and the second terminals of the capacitor, thereby adjusting the inductance parameters of the third matching unit 320. Through the gating function of the gating device, the number of inductors connected to the corresponding connection can be selected, thus adjusting the inductance parameters of the third matching unit 320, allowing the third matching unit 320 to perform tuning processing on the second feed signal based on the configured inductance parameters.

[0067] Optionally, the fourth matching unit 330 may include a grounding inductor, which also effectively adjusts the inductance parameters of the third matching unit 320, thereby achieving bandwidth tuning of the second feed signal. It is understood that the number of inductors, the parameters of the capacitors, and the parameters of each inductor in the second matching circuit 30 can all be adjusted based on actual needs, and the number of multiple second terminals of the selection device can be adjusted accordingly based on the number of inductors in the third matching unit 320.

[0068] Optionally, the aforementioned switching unit 310 can be a single-pole single-throw switch to achieve the switching function between on and off states.

[0069] like Figure 11 As shown, taking the third matching unit 320 as including a capacitor (C1 in the figure) and three inductors (L5, L6, L7 in the figure), the fourth matching unit 330 as including a ground inductor (L8 in the figure), the gating device is configured with a common terminal and four connection terminals, and the switching unit 310 includes a single-pole single-throw switch (S1 in the figure) as an example, by switching the gating device, the connection state of the capacitor, each inductor and ground terminal mentioned above can be controlled, thereby adjusting the resonant frequency and bandwidth of the radiation unit 10 in non-low frequency ranges.

[0070] The following is Figure 9 and Figure 11 Taking an antenna assembly with a radiating element 10 of 22mm and supporting mid-to-high frequency bands as an example, CST simulation is performed. By adjusting the parameters of the inductors and capacitors in the first matching circuit 20 and the second matching circuit 30, B1, B3, B5, B8, B28, B40, and B41 can be achieved. The S11 curves corresponding to each frequency band are shown below. Figure 12 As shown. Thus, this antenna assembly can achieve coverage of low-frequency and mid-to-high-frequency bands based on the radiating element 10 being 22mm.

[0071] Optionally, in other embodiments, the switching unit 310 may also be a large inductor. The first end of the large inductor is connected to the third matching unit 320 and the second feed point K2, respectively. The second end of the large inductor is grounded, and the second end of the selection device is connected to the second end of the large inductor. When the selection device short-circuits the large inductor, the large inductor is in a low impedance state, which is equivalent to connecting the third matching unit 320 and the second feed point K2. The third matching unit 320 is in a capacitive tuning state, and then resonates and adjusts the second feed signal. When the large inductor is in a non-short-circuit state, the large inductor is in a high impedance state, which makes the third matching unit 320 also in a high impedance state. As a result, the second feed point K2 is in an open circuit state, and the feeding effect of the second matching circuit 30 on the radiation unit 10 approaches zero.

[0072] It is understood that the above only shows some embodiments related to the first matching circuit 20 and the second matching circuit 30. In other embodiments, adjustments can be made based on any one or more of the above embodiments, as long as the first matching circuit 20 and the second matching circuit 30 have corresponding functions and the resonance of the miniaturized antenna assembly can cover the low-frequency band and the non-low-frequency band.

[0073] This application also provides a communication device, including an antenna assembly as described in any or a combination of the above embodiments. Based on the antenna assembly described above, the communication device of this embodiment can reduce both the number of antennas and the spatial size of the antennas when antenna space is limited. Taking the mid-to-high frequency band (non-low frequency band) as an example, the antenna size can be reduced to approximately 20mm, achieving miniaturization while maintaining multi-band coverage.

[0074] like Figure 13 As shown, further, taking the aforementioned communication device as mobile phone 11 as an example for explanation, specifically, as follows... Figure 13 As shown, the mobile phone 11 may include a memory 21 (which optionally includes one or more computer-readable storage media), processing circuitry 22, a peripheral device interface 23, an antenna assembly 24 as described in the above embodiments, 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 13 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 13 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] The processing circuit 22 and other control circuits can be used to control the operation of the mobile phone 11. The processing circuit 22 can be based on one or more microprocessors, microcontrollers, digital signal processors, baseband processors, power management units, audio codec chips, application-specific integrated circuits, etc. The processing circuit 22 can be configured to implement control algorithms for controlling the use of the antenna assembly in the mobile phone 11. The processing circuit 22 can also issue control commands for controlling the switches in the antenna assembly 24, etc.

[0077] I / O subsystem 26 couples input / output peripherals on mobile phone 11, such as a 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, LEDs and other status indicators, data ports, 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.

[0078] This application also provides a matching control method, applied to the communication device described in the above embodiments, such as... Figure 14 As shown, the matching control method includes steps S142 and S144.

[0079] In step S142, when the target operating frequency band of the antenna assembly is a low frequency band, the first matching circuit is controlled to be in an inductive tuning state and the second matching circuit is controlled to be in a first impedance state, so that the first matching circuit resonates and adjusts the first feed signal input from the first feed source, and the radiating unit operates in the low frequency band under the excitation of the first feed signal.

[0080] In step S144, when the target operating frequency band of the antenna assembly is a non-low frequency band, the first matching circuit is controlled to be in the second impedance state, and the second matching circuit is controlled to be in the capacitive tuning state, so that the second matching circuit resonates and adjusts the second feed signal input by the second feed source, and the radiating unit operates in the non-low frequency band under the excitation of the second feed signal.

[0081] The above steps can be performed by the processing circuit of the communication device in the previous embodiment to obtain the target operating frequency band of the antenna assembly. The processing circuit obtaining the target operating frequency band of the antenna assembly is prior art and is not limited here. After determining the target operating frequency band, the processing circuit can send control information to the RF transceiver, which in turn outputs corresponding control information to each matching circuit. Alternatively, the processing circuit can directly output corresponding control signals to the first matching circuit and the second matching circuit to control the matching circuits to switch between impedance and tuning states. Furthermore, the control signal can be sent to the matching control unit in the first matching circuit and the gating device in the second matching circuit to control the relevant matching control unit and gating device to perform related actions. The relevant features involved in the above steps can be referred to in the above-described embodiment of the antenna assembly, and will not be repeated here.

[0082] The matching control method provided in this embodiment can control the first matching circuit and the second matching circuit to switch between impedance state and tuning state according to the target operating frequency band. This allows for a reduction in the number of antennas and a significant reduction in the spatial size of the antennas when antenna space is limited, thereby achieving miniaturization of antenna components while maintaining multi-band coverage.

[0083] This application also provides a matching control device applied to the communication device described in the above embodiment. The matching control device controls a first matching circuit to be inductively tuned and a second matching circuit to be in a first impedance state when the target operating frequency band of the antenna assembly is a low-frequency band. This causes the first matching circuit to resonate with the first feed signal input from the first feed source, and the radiating element operates in the low-frequency band under the excitation of the first feed signal. When the target operating frequency band of the antenna assembly is a non-low-frequency band, the first matching circuit is controlled to be in a second impedance state and the second matching circuit is controlled to be in a capacitively tuned state. This causes the second matching circuit to resonate with the second feed signal input from the second feed source, and the radiating element operates in the non-low-frequency band under the excitation of the second feed signal. This matching control device can be, for example, a processing circuit in the communication device; please refer to the previous embodiment for a related description, which will not be repeated here.

[0084] This application also provides a computer device, including: a memory and a processor, wherein the memory stores a computer program, and the processor executes the computer program to implement the steps of the above-described method for determining radio frequency gain, or to implement the steps of the above-described method for matching control.

[0085] This application also provides a computer-readable storage medium storing a computer program thereon, characterized in that, when the computer program is executed by a processor, it implements the steps of the above-described method for determining radio frequency gain, or the steps of the above-described method for matching control.

[0086] 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).

[0087] The technical features of the above embodiments can be combined arbitrarily. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as the combination of these technical features does not contradict each other, it should be considered within the scope of this specification. The above embodiments only illustrate several implementation methods of this application, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of this patent application. It should be noted that for those skilled in the art, several modifications and improvements can be made 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 assembly, characterized in that, include: The radiating element has a first feed point and a second feed point arranged at intervals; The first matching circuit is connected to the first feed source and the first feed point of the radiation unit, respectively. The second matching circuit is connected to the second feed source and the second feed point of the radiation unit, respectively. Wherein, when the second matching circuit is in the first impedance state, the first matching circuit is in the inductive tuning state to resonate and adjust the first feed signal input to the first feed source. The first feed point is connected to the first feed source through the first matching circuit and the second feed point is in the open circuit state, so that the radiating unit operates in the low frequency band under the excitation of the first feed signal. When the first matching circuit is in the second impedance state, the second matching circuit is in the capacitive tuning state to resonate and adjust the second feed signal input from the second feed source. The first feed point is connected to ground through the first matching circuit, and the second feed point is capacitively coupled through the second matching circuit, so that the radiating unit operates in the non-low frequency band under the excitation of the second feed signal, and the first impedance is greater than the second impedance.

2. The antenna assembly according to claim 1, characterized in that, The radiating element has a first end and a second end, the first feed point is located at the first end, and the second feed point is located between the first end and the second end; Specifically, when the first matching circuit is in an inductively tuned state and the second matching circuit is in a first impedance state, the radiating unit operates in monopole mode to support the transmission and reception of low-frequency band signals; when the first matching circuit is in the second impedance state and the second matching circuit is in the capacitively tuned state, the radiating unit operates in IFA mode or CRLH mode to support the transmission and reception of non-low-frequency band signals.

3. The antenna assembly according to claim 1, characterized in that, The first matching circuit includes: A first matching unit, wherein a first end of the first matching unit is connected to the first feed source, and a second end of the first matching unit is grounded; The second matching unit has a first end connected to the first feed source and a second end connected to the first feed point. A matching control unit, wherein a first end of the matching control unit is connected to a first end of the first matching unit and a first end of the second matching unit, and a plurality of second ends of the matching control unit are respectively connected to a second end of the first matching unit and a second end of the second matching unit; Specifically, when the matching control unit controls the first feed source to be connected to the first matching unit and the second matching unit respectively, and the first feed point to be connected to the second matching unit, the first matching unit and the second matching unit are respectively in the inductive tuning state and jointly used to resonate and adjust the first feed signal; when the matching control unit controls the first feed source and the first matching unit to be in a ground short-circuit state, the first matching unit and the second matching unit are respectively in the second impedance state.

4. The antenna assembly according to claim 3, characterized in that, The second matching unit includes multiple inductors connected in series; The matching control unit has another second terminal connected to the node between two adjacent inductors. The matching control unit is also used to control the connection state of each node with the first feed source when the first feed source is connected to the first matching unit and the second matching unit respectively, so as to adjust the inductance parameters of the second matching unit.

5. The antenna assembly according to claim 1, characterized in that, The second matching circuit includes: The third matching unit, wherein the first end of the third matching unit is connected to the second feed source; The switching unit is connected to the third matching unit and the second feed point, respectively. Specifically, when the switching unit disconnects the connection between the third matching unit and the second feed point, the third matching unit is in the first impedance state; when the switching unit connects the connection between the third matching unit and the second feed point, the third matching unit is in the capacitive tuning state to resonate and adjust the second feed signal.

6. The antenna assembly according to claim 5, characterized in that, The third matching unit includes: The device includes a capacitor, multiple inductors, and a gating device. The first terminal of the gating device is connected to the first terminal of the capacitor and the switching unit, respectively. The multiple second terminals of the gating device are connected to the second terminal of the capacitor and the first terminals of the multiple inductors, respectively. The second terminal of each inductor is grounded, and the second terminal of the capacitor is also connected to the second feed source. When the switching unit is in the on state, the gating device is used to control the connection state between the second feed point and the first terminal of each inductor and the second terminal of each capacitor, so as to adjust the inductance parameters of the third matching unit.

7. The antenna assembly according to claim 5, characterized in that, The second matching circuit also includes: The fourth matching unit has its first end connected to the switching unit and the third matching unit, and its second end grounded. The fourth matching unit is used to work with the third matching unit to resonate and adjust the second feed signal.

8. The antenna assembly according to any one of claims 1-7, characterized in that, The non-low frequency band includes at least one of the mid-frequency band, high-frequency band, and ultra-high-frequency band.

9. A communication device, characterized in that, include: The antenna assembly as described in any one of claims 1-8.

10. A matching control method, characterized in that, Applied to the communication device as described in claim 9, the matching control method includes: When the target operating frequency band of the antenna assembly is a low frequency band, the first matching circuit is controlled to be in an inductive tuning state and the second matching circuit is controlled to be in a first impedance state, so that the first matching circuit resonates and adjusts the first feed signal input from the first feed source, and the radiating element operates in the low frequency band under the excitation of the first feed signal. When the target operating frequency band of the antenna assembly is a non-low frequency band, the first matching circuit is controlled to be in the second impedance state, and the second matching circuit is controlled to be in the capacitive tuning state, so that the second matching circuit resonates and adjusts the second feed signal input by the second feed source, and the radiating unit operates in the non-low frequency band under the excitation of the second feed signal.

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