Antenna assembly, communication device and matching control method

Abstract

The invention relates to an antenna assembly, communication equipment and a matching control method, on the basis of switching of impedance states and tuning states of a first matching circuit and a second matching circuit, on one hand, a radiation unit can realize multi-band coverage, the antenna broadband is widened, the use number of antennas is reduced, and the occupied area of the antenna assembly is reduced; and on the other hand, the radiation unit with a smaller size can be selected according to the electrical length requirement when the radiation unit works in a non-low frequency band, so that the miniaturization of the antenna assembly is realized, and the occupied space of the antenna assembly is further reduced. Therefore, according to the antenna assembly provided by the embodiment of the invention, under the condition that the antenna space is limited, the number of antennas can be reduced, the space size of the antennas can be remarkably reduced, and miniaturization is realized on the basis of multi-band coverage.

Description

Technical Field

[0001] The present application relates to the field of antenna technology, and in particular to an antenna component, a communication device, and a matching control method. Background Art

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

[0003] The embodiments of the present application provide an antenna assembly, a communication device, and a matching control method, which can realize the miniaturization of the antenna on the basis of being compatible with communications in more frequency bands and reduce the space occupied.

[0004] A first aspect of the present application provides an antenna assembly, including:

[0005] A radiating unit having a first feeding point and a second feeding point arranged at an interval;

[0006] A first matching circuit is connected to the first feed source and the first feeding point of the radiating unit respectively;

[0007] A second matching circuit is connected to the second feed source and the second feeding point of the radiation unit respectively;

[0008] 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 by 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 a capacitive tuning state to resonate and adjust the second feed signal input by the second feed source, so that the radiating unit operates in a 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 the present application provides a communication device, including:

[0011] An antenna assembly as described above.

[0012] A third aspect of the present application provides a matching control method, which is applied to the antenna assembly or the communication device as described above, and the matching control method includes:

[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 by the first feed source, and the radiating unit operates in a 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 a second impedance state, and the second matching circuit is controlled to be in a 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 above antenna assembly, communication equipment and matching control method, based on the switching of the impedance state and tuning state of the first matching circuit and the second matching circuit, can, on the one hand, enable the radiating unit to achieve multi-band coverage, broaden the antenna bandwidth while reducing the number of antennas used, and reduce the occupied area of ​​the antenna assembly; on the other hand, a smaller radiating unit can be selected according to the electrical length requirement when the radiating unit works in a non-low-frequency band, so as to achieve miniaturization of the antenna assembly and further reduce the occupied space of the antenna assembly. 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. Taking the non-low-frequency band as the medium-high frequency band as an example, the antenna size can be reduced to about 20 mm, achieving miniaturization on the basis of multi-band coverage. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] 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.

[0017] Figure 1 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 an embodiment;

[0019] Figure 3 The third structural block diagram of an antenna assembly according to an embodiment;

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

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

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

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

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

[0025] Fig. 9 is one of the circuit diagrams of an antenna assembly according to an embodiment;

[0026] Fig.10 The eighth structural block diagram of an antenna assembly according to an embodiment;

[0027] Fig.11 The second circuit diagram of the antenna assembly of one embodiment;

[0028] Fig.12 for Fig. 9 , Fig.11 S11 graph of the antenna assembly shown;

[0029] Fig.13 is a structural block diagram of a communication device in an embodiment;

[0030] Fig.14 is a flow chart of a matching control method in one embodiment. DETAILED DESCRIPTION

[0031] 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.

[0032] It is understood that the terms "first", "second", etc. used in this application can be used to describe various elements in this article, 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 "multiple" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined. When an element is considered to be "connected" to another element, it can be directly connected to the other element or there may be a centering element at the same time.

[0033] The antenna assembly involved in the embodiments of the present application can be applied to communication devices with wireless communication functions, and the communication 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 communication devices.

[0034] Figure 1 is a structural block diagram of an antenna assembly according to an embodiment, refer to Figure 1 In this embodiment, the antenna assembly includes a radiation unit 10 , a first matching circuit 20 and a second matching circuit 30 .

[0035] The radiating unit 10 has a first feeding point K1 and a second feeding point K2 which are arranged at intervals; the first matching circuit 20 is respectively connected to the first feed source S1 and the first feeding point K1 of the radiating unit 10; the second matching circuit 30 is respectively connected to the second feed source S2 and the second feeding point K2 of the radiating unit 10; wherein, when the second matching circuit 30 is in a first impedance state, the first matching circuit 20 is in an inductive tuning state to resonantly adjust the first feeding signal input by the first feed source S1, so that the radiating unit 10 operates in a low-frequency band under the excitation of the first feeding 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 resonantly adjust the second feeding signal input by the second feed source S2, so that the radiating unit 10 operates in a non-low-frequency band under the excitation of the second feeding signal, and the first impedance is greater than the second impedance.

[0036] The first feeding point K1 of the radiation unit 10 is connected to the first feed source S1 through the first matching circuit 20, and the second feeding point K2 is connected to the second feed source S2 through the second matching circuit 30. The first feed source S1 and the second feed source S2 are respectively used to output the first feeding signal and the second feeding signal to the radiation unit 10. When the antenna assembly is applied to a communication device, and the communication device includes a plurality of frames connected end to end, the radiation unit 10 can be located as a whole on one frame of the communication device, or it can be located on two adjacent frames of the communication device at the same time, that is, located at the corner of the frame of the communication device (such as Figure 2 As shown, 40 is a middle plate of the communication device, and a plurality of 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 arranged on the main board of the communication device.

[0037] Among them, the first impedance is greater than the second impedance, the first impedance can be understood as high impedance, the input and output impedances are large, so the first impedance state can be understood as a high impedance state, which is equivalent to an open circuit state; the second impedance can be understood as low impedance, the input and output impedances are small, so the second impedance state 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 an inductive device, such as an inductor, existing in the path between the first matching circuit 20 and the first feeding point K1. The inductor is an equivalent distributed inductor (such as Figure 3 As shown, Figure 3 It is only a brief equivalent schematic diagram to illustrate the existence of distributed inductance L01), which is equivalent to the lumped device inductance (such as Figure 3 As shown in the figure, to illustrate the existence of the lumped device inductor L02), the actual size of the radiating unit 10 can be reduced on the basis of effectively increasing the electrical length of the radiating element, which is convenient for the installation and layout of the antenna assembly, and can also effectively reduce the cost. The capacitive tuning state can be understood as the presence of a capacitive device, such as a capacitor, on the path between the second matching circuit 30 and the second feeding point K2, thereby enabling the radiating unit 10 to perform capacitive coupling feeding.

[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, which is equivalent to the second matching circuit 30 disconnecting 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, the impedance of the first feed signal input by the first feed source S1 can be adjusted. On the other hand, based on the existence of the inductive device, the resonant frequency of the radiation unit 10 can be adjusted, and the electrical length of the radiation element can be increased on the basis of maintaining a preset size of the radiation element, so that the radiation element works in the low frequency band under the excitation of the first feed signal. Therefore, a radiation unit 10 with a smaller actual size can be selected, and a larger electrical length size can be achieved through the matching tuning of the first matching circuit 20. Then, on the basis of shortening the actual size of the radiation unit 10, the radiation unit 10 can reach the electrical length required for the low frequency band, thereby 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 return state, which is equivalent to the first feeding 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, the impedance of the second feed signal input by the second feed source S2 can be adjusted, and on the other hand, the resonant frequency of the radiation unit 10 can be adjusted so that the radiation element works in a 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, and the higher the frequency band, the smaller the required electrical length. The electrical length when working in the non-low frequency band is smaller than the electrical length of the radiation unit 10 when working in the low frequency band. A smaller radiation unit 10 can be selected according to the electrical length requirement when the radiation unit 10 works in the non-low frequency band to achieve miniaturization of the antenna assembly and further reduce the occupied space of the antenna assembly.

[0041] Optionally, the non-low-frequency band includes at least one of the medium-frequency band, the high-frequency band and the ultra-high-frequency band. By switching the impedance state and the tuning state of the first matching circuit 20 and the second matching circuit 30, the radiation unit 10 can be operated in a low-frequency band or a non-low-frequency band. It can also be based on the parameter adjustment of the first matching circuit 20 and the second matching circuit 30, so that the antenna component can cover multiple frequency bands at the same time in a certain state to realize the carrier aggregation CA function, for example, it can cover multiple sub-band signals in the low-frequency band at the same time, or cover multiple sub-band signals in the non-low-frequency band at the same time, or cover a part of the low-frequency sub-band and a part of the non-low-frequency sub-band at the same time. Among them, the division of the low-frequency band, medium-frequency band, high-frequency band and ultra-high-frequency band of 4G LTE and 5G NR can refer to the following table.

[0042]

[0043] It can be understood that in other embodiments, the embodiments of the present application are not limited to realizing the low frequency band, medium frequency band, high frequency band and ultra-high frequency band of 4G LTE and 5G NR, but can also be based on the adjustment of specific parameters of the first matching unit and the second matching unit to be suitable for GPS / WiFi and other frequency bands.

[0044] In related technologies, such as Figure 4 As shown in the figure, the antenna assembly includes an LB antenna and an MHB antenna, and the main branches of the two antennas are both CRLH modes. 1 is the feed point of the LB antenna, 2 is the LB antenna switch, which is used to switch different LB frequency bands. 3 is the MHB antenna feed point, and 4 is the MHB antenna parasitic branch. The antenna assembly occupies more top space, and the antenna size is more than 30mm.

[0045] In this embodiment, based on the switching of the impedance state and tuning state of the first matching circuit 20 and the second matching circuit 30, on the one hand, it is possible to achieve multi-band coverage based on the same radiating unit 10, broaden the antenna bandwidth while reducing the number of antennas used and reducing the occupied area of ​​the antenna assembly; on the other hand, a smaller radiating unit 10 can be selected according to the electrical length requirement when the radiating unit 10 works in a non-low-frequency band, so as to achieve miniaturization of the antenna assembly and further reduce the occupied space of the antenna assembly. 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. Taking the non-low-frequency band as the mid-high frequency band as an example, the antenna size can be reduced to about 20 mm, achieving miniaturization on the basis of multi-band coverage.

[0046] In one embodiment, the radiating unit 10 has a first end and a second end, the first feeding point K1 is located at the first end, and the second feeding point K2 is 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 a monopole mode to support the reception and transmission 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 an IFA mode or a CRLH mode to support the reception and transmission of non-low-frequency band signals.

[0047] Among them, the first feeding point K1 and the second feeding point K2 are arranged at intervals and the first feeding point K1 is located at the first end of the radiation unit 10. Therefore, the second feeding point K2 is located between the first end and the second end, which can include the second feeding point K2 is located at the second end, and the second feeding point K2 is located at any position between the first end and the second end that is spaced from the first end.

[0048] When the first matching circuit 20 is in the inductive tuning state and the second matching circuit 30 is in the 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 the open circuit state. Therefore, the first feed signal output by the first feed source S1 excites the radiating element 10 to be in the state as shown in FIG. Figure 5 The monopole mode shown supports the transmission and reception of low frequency band signals.

[0049] When the first matching circuit 20 is in the second impedance state, i.e., the short-circuit state, and the second matching circuit 30 is in the capacitive tuning state, the first end of the radiating unit 10 is connected to the ground through the first matching circuit 20, and the second end or any position between the first end and the second end is capacitively coupled and fed through the second matching circuit 30, wherein when the second feeding point K2 is at the second end, the second feeding signal output by the second feed source S2 excites the radiating unit 10 to be in the state as shown in the capacitive tuning of the second matching circuit 30. Figure 6 In the CRLH mode shown in FIG. 1 , when the second feeding point K2 is at a position other than the second end, the second feeding signal output by the second feed source S2 excites the radiation unit 10 to be in the state as shown in FIG. 1 under the capacitive tuning of the second matching circuit 30. Figure 7 IFA mode shown.

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

[0051] In one embodiment, if 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, wherein the first end of the first matching unit 210 is connected to the first feed source S1, and the second end of the first matching unit 210 is grounded; a second matching unit 220, wherein the first end of the second matching unit 220 is connected to the first feed source S1, and the second end of the second matching unit 220 is connected to the first feeding point K1; a matching control unit 230, wherein the first end of the matching control unit 230 is respectively connected to the first end of the first matching unit 210 and the first end of the second matching unit 220, and the multiple second ends of the matching control unit 230 are respectively connected to the second end of the first matching unit 210 and the second end of the second matching unit 220. The two ends are connected correspondingly; 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 feeding 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 jointly used 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 back 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, and 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 feeding point K1 respectively, and can also control the working state of the first matching unit 210 and the second matching unit 220. The connection relationship includes a connection state and a return short circuit state; the working 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 in a connected state with the first feed source S1 and the second matching unit 220, and the second matching unit 220 to be in a connected state with the first feeding 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 inductance path is formed between the first feed source S1 and the ground end, and a second inductance path is formed between the first feed source S1 and the first feeding point K1. On the one hand, due to the existence of the second inductance path, which is equivalent to the lumped device inductance of the radiation unit 10, the equivalent distributed inductance of the radiation unit 10 itself can be replaced to reduce the actual size of the radiation unit 10. On the other hand, the first inductance path can be used to adjust the resonant bandwidth of the radiation unit 10, and the second inductance path can be used to adjust the resonant frequency of the radiation unit 10. Therefore, the two inductance paths can jointly realize the tuning processing of the first feed source S1 signal output by the first feed source S1, so that the radiation unit 10 works in a low-frequency band of a preset resonant bandwidth on the basis of a smaller size, thereby 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, the first feeding point K1 is equivalent to being connected to the ground, the first matching unit 210 and the second matching unit 220 are respectively in a low impedance state, and the first feeding signal output by the first feed source S1 has a feeding effect on the radiation unit 10 that approaches zero.

[0056] Therefore, matching tuning can be achieved through the first matching unit 210, the second matching unit 220, and the matching control unit 230 to achieve a larger electrical length size. Then, on the basis of shortening the actual size of the radiation unit 10, the radiation unit 10 can reach the electrical length required for the low-frequency band, thereby realizing the miniaturization of the antenna assembly.

[0057] Optionally, the second matching unit 220 may include a plurality of inductors connected in series; wherein the second ends of the other part of the matching control unit 230 are respectively connected to the nodes between two adjacent inductors, and the matching control unit 230 is further used to control the connection state of each node with the first feed source S1 when the first feed source S1 is controlled to be connected to the first matching unit 210 and the second matching unit 220, so as to adjust the inductance parameters of the second matching unit 220. The parameters of the plurality of inductors may be the same or different, and the matching control unit 230 controls the connection states of different numbers of inductors with the first feed source S1, respectively, and then controls the number of inductors that play a tuning role on the second inductance path between the first feed source S1 and the first feeding 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, the one or more inductors are connected to the ground, and the matching control unit 230 is connected to both ends of the second matching unit 220 respectively.

[0059] Optionally, the matching control unit 230 may be a switch chip, which is configured with a common terminal and multiple connection terminals, the common terminal of the switch chip being the first terminal of the matching control unit 230, the multiple connection terminals of the switch chip being the multiple second terminals of the matching control unit 230, and the switch chip may control the common terminal to be connected to any one of the at least one connection terminals, so as to realize the control of the connection state and the working state of the first matching unit 210 and the second matching unit 220. It can be understood that the number of connection terminals of the switch chip may be adjusted and set according to the number of inductors of the second matching unit 220.

[0060] like Fig. 9 As shown, the first matching unit 210 includes an inductor (such as L1 in the figure), the second matching unit 220 includes three inductors connected in series (such as L2, L3, and L4 in the figure), and the switch chip is configured with a common terminal and four connection terminals. By switching the switch chip, the connection state between each inductor and the ground terminal in the first inductor path mentioned above can be controlled, and the inductor value connected in series in the second inductor path can be controlled, so as to adjust the resonance frequency and bandwidth of the radiation unit 10 at low frequency. Specifically, when RF4 in the switch chip is in the off state, the switch 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 return state, and at this time, non-low-frequency bands, such as the MHB band, can be debugged.

[0061] In one embodiment, if Fig.10 As shown, the second matching circuit 30 includes: a switch unit 310 and a third matching unit 320 .

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

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

[0064] Optionally, please continue to refer to Fig.10 The second matching circuit 30 also includes: a fourth matching unit 330, a first end of the fourth matching unit 330 is respectively connected to the switch unit 310 and the third matching unit 320, a second end of the fourth matching unit 330 is grounded, and the fourth matching unit 330 is used to resonate and adjust the second feed signal together with the third matching unit 320.

[0065] Among them, the first end of the fourth matching unit 330 is connected to the second feeding point K2 through the switching unit 310, and the second end of the fourth matching unit 330 is connected to the ground. The fourth matching unit 330 can adjust the resonant bandwidth of the radiation unit 10 when the switching unit 310 is in the on state. Therefore, the third matching unit 320 and the fourth matching unit jointly 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, a plurality of inductors and a gating device, wherein the first end of the gating device is respectively connected to the first end of the capacitor and the switch unit 310, and the plurality of second ends of the gating device are respectively connected to the second end of the capacitor and the first ends of the plurality of inductors, the second end of each inductor is grounded, and the second end of the capacitor is also connected to the second feed source S2; wherein, when the switch unit 310 is in the on state, the gating device is used to control the connection state between the second feeding point K2 and the first end of each inductor and the second end of the capacitor, respectively, so as to adjust the inductance parameter 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, and the inductance parameter of the third matching unit 320 can be adjusted, so that the third matching unit 320 performs tuning processing on the second feed signal based on the configured inductance parameter.

[0067] Optionally, the fourth matching unit 330 may include a ground inductor, which is equivalent to adjusting the inductance parameter of the third matching unit 320 to achieve bandwidth tuning of the second feed signal. It can be understood that the number of inductors, the parameters of capacitors and the parameters of each inductor in the second matching circuit 30 can be adjusted and set based on actual needs, and the number of the multiple second ends of the gating device can be adjusted accordingly according to the number of inductors in the third matching unit 320.

[0068] Optionally, the switch unit 310 may be a single-pole single-throw switch to achieve an on-off switching function.

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

[0070] As follows Fig. 9 and Fig.11 The antenna assembly shown in the figure has an actual size of 22 mm and supports a medium-high frequency band instead of a low-frequency band. By adjusting the parameters of the inductor and capacitor components 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 the frequency bands are shown as follows: Fig.12 As shown. Therefore, the antenna assembly can achieve coverage of low-frequency, medium-frequency and high-frequency bands based on the radiation unit 10 being 22 mm.

[0071] Optionally, in other embodiments, the switch unit 310 may also select a large inductor, the first end of the large inductor is respectively connected to the third matching unit 320 and the second feeding point K2, the second end of the large inductor is grounded, and a 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 turning on the connection between the third matching unit 320 and the second feeding point K2. The third matching unit 320 is in a capacitive tuning state, and then the second feeding signal is resonantly adjusted; when the large inductor is in a non-short-circuited state, the large inductor is in a high impedance state, so that the third matching unit 320 is also in a high impedance state, so that the second feeding point K2 is in an open circuit state, and the feeding effect of the second matching circuit 30 on the radiation unit 10 is close to zero.

[0072] It can be 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 also 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 component can cover the low-frequency band and the non-low-frequency band.

[0073] The embodiment of the present application also provides a communication device, including: an antenna assembly as described in any one of the above embodiments or a combination of multiple embodiments. The communication device of this embodiment, based on the antenna assembly of the above embodiment, can reduce the number of antennas and significantly reduce the spatial size of the antenna when the antenna space is limited. Taking the non-low-frequency band as the medium-high frequency band as an example, the antenna size can be reduced to about 20 mm, achieving miniaturization on the basis of multi-band coverage.

[0074] like Fig.13 As shown, further, the above communication device is taken as a mobile phone 11 as an example for explanation, specifically, as Fig.13 As shown, the mobile phone 11 may include a memory 21 (which may optionally include one or more computer-readable storage media), a processing circuit 22, a peripheral device interface 23, an antenna assembly 24 of the above embodiment, 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.13 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 a combination of certain components, or a different arrangement of components. Fig.13 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.

[0075] 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.

[0076] The processing circuit 22 and other control circuits may be used to control the operation of the mobile phone 11. The processing circuit 22 may be based on one or more microprocessors, microcontrollers, digital signal processors, baseband processors, power management units, audio codec chips, application specific integrated circuits, etc. The processing circuit 22 may be configured to implement a control algorithm that controls the use of the antenna assembly in the mobile phone 11. The processing circuit 22 may also issue control commands for controlling switches in the antenna assembly 24, etc.

[0077] 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.

[0078] The present application also provides a matching control method, which is applied to the communication device in the above embodiment. Fig.14 As shown, the matching control method includes: step S142 and step S144.

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

[0080] 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 a second impedance state, and the second matching circuit is controlled to be in a 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 belongs to the prior art and is not limited here. After determining the target operating frequency band, the processing circuit can output corresponding control information to the RF transceiver, and then the RF transceiver outputs corresponding control information to each matching circuit, or the processing circuit directly outputs corresponding control signals to the first matching circuit and the second matching circuit to control the matching circuit to switch between the impedance state and the tuning state. 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, gating device, etc. to perform relevant actions. The relevant features involved in the above steps can refer to the above-mentioned 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 the impedance state and the tuning state according to the target working frequency band, so that when the antenna space is limited, the number of antennas can be reduced and the spatial size of the antenna can be significantly reduced, thereby realizing the miniaturization of the antenna assembly on the basis of multi-band coverage.

[0083] The embodiment of the present application also provides a matching control device, which is applied to the communication device of the above embodiment. The matching control device is used to control the first matching circuit to be in an inductive tuning state and the 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, so that the first matching circuit resonates and adjusts the first feed signal input by the first feed source, and the radiating unit works 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 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 works in the non-low frequency band under the excitation of the second feed signal. The matching control device can be, for example, a processing circuit in a communication device. For related introduction, please refer to the previous embodiment, which will not be repeated here.

[0084] An embodiment of the present application also provides a computer device, including: a memory and a processor, the memory stores a computer program, and when the processor executes the computer program, it implements the steps of the above-mentioned method for determining the RF gain, or implements the steps of the above-mentioned matching control method.

[0085] An embodiment of the present application also provides a computer-readable storage medium having a computer program stored thereon, characterized in that when the computer program is executed by a processor, the steps of the above-mentioned method for determining the RF gain are implemented, or the steps of the above-mentioned matching control method are implemented.

[0086] 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).

[0087] The technical features of the above embodiments can be combined arbitrarily. In order to make the description concise, all possible combinations of the technical features in the above embodiments are not 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. The above embodiments only express several implementation methods of the present application, and their descriptions are relatively specific and detailed, but they cannot be understood as limiting the scope of the patent of this application. It should be pointed out that for ordinary technicians in this field, without departing from the concept of the present application, several deformations and improvements can be made, which all belong to the scope of protection of this application. Therefore, the scope of protection of the patent of this application shall be based on the attached claims.

Claims

1. An antenna assembly, characterized in that: include: A radiating unit having a first feeding point and a second feeding point arranged at an interval; A first matching circuit is connected to the first feed source and the first feeding point of the radiating unit respectively; A second matching circuit is connected to the second feed source and the second feeding 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 by the first feed source, 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 a capacitive tuning state to resonate and adjust the second feed signal input by the second feed source, so that the radiating unit operates in a 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 radiation unit has a first end and a second end, the first feeding point is located at the first end, and the second feeding point is located between the first end and the second end; Specifically, when the first matching circuit is in the inductive tuning state and the second matching circuit is in the first impedance state, the radiating unit operates in the monopole mode to support the reception and transmission of low-frequency band signals; when the first matching circuit is in the second impedance state and the second matching circuit is in the capacitive tuning state, the radiating unit operates in the IFA mode or the CRLH mode to support the reception and transmission of non-low-frequency band signals.

3. The antenna assembly according to claim 1, characterized in that: The first matching circuit comprises: 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; a second matching unit, wherein a first end of the second matching unit is connected to the first feed source, and a second end of the second matching unit is connected to the first feeding 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 respectively, and a plurality of second ends of the matching control unit are connected to a second end of the first matching unit and a second end of the second matching unit respectively; Wherein, when the matching control unit controls the first feed source to be in a connected state with the first matching unit and the second matching unit respectively, and the first feeding point to be in a connected state with the second matching unit, the first matching unit and the second matching unit are respectively in the inductive tuning state and are jointly used to resonate and adjust the first feeding signal; when the matching control unit controls the first feed source and the first matching unit to be in a short-circuit state back to ground, 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 a plurality of inductors connected in series; Among them, the other part of the second end of the matching control unit is respectively connected to the nodes between two adjacent inductors, and 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 controlled to be in a connected state with 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 comprises: a third matching unit, wherein a first end of the third matching unit is connected to the second feed source; a switch unit, connected to the third matching unit and the second feeding point respectively; Wherein, when the switch unit disconnects the connection between the third matching unit and the second feeding point, the third matching unit is in the first impedance state; when the switch unit conducts the connection between the third matching unit and the second feeding point, the third matching unit is in the capacitive tuning state to resonate and adjust the second feeding signal.

6. The antenna assembly according to claim 5, characterized in that: The third matching unit comprises: A capacitor, a plurality of inductors and a gating device, wherein the first end of the gating device is respectively connected to the first end of the capacitor and the switch unit, the plurality of second ends of the gating device are respectively connected to the second end of the capacitor and the first ends of the plurality of inductors, the second end of each of the inductors is grounded, and the second end of the capacitor is also connected to the second feed source; Wherein, when the switch unit is in the on state, the gating device is used to control the connection state between the second feeding point and the first end of each inductor and the second end of the capacitor, so as to adjust the inductance parameter of the third matching unit.

7. The antenna assembly according to claim 5, characterized in that: The second matching circuit further includes: A fourth matching unit, wherein a first end of the fourth matching unit is respectively connected to the switch unit and the third matching unit, a second end of the fourth matching unit is grounded, and the fourth matching unit is used to perform resonance adjustment on the second feeding signal together with the third matching unit.

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

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

10. A matching control method, characterized in that: Applied to the communication device according to claim 9, the matching control method comprises: 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 by the first feed source, and the radiating unit operates in a 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 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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