Antenna assembly and electronic equipment

Abstract

The utility model relates to an antenna assembly and electronic equipment. The antenna assembly includes: an antenna radiator; the first end of the first matching circuit is electrically connected with the antenna radiator; the first end of the second matching circuit is electrically connected with the second end of the first matching circuit, and the second end of the second matching circuit is used for being electrically connected with a signal source; and the impedance adjusting circuit is connected with the first matching circuit in parallel, and the impedance adjusting circuit is used for adjusting the impedance of the first matching circuit. The impedance of the first matching circuit is adjusted through the impedance adjusting circuit, the tuning bandwidth of the antenna assembly can be increased, the overall efficiency of the antenna assembly in a certain frequency band is increased, and therefore the performance of the antenna assembly is improved.

Description

TECHNICAL FIELD

[0001] The present disclosure relates to the technical field of communication, and in particular, to an antenna assembly and an electronic device. BACKGROUND

[0002] In an electronic device, a signal source is electrically connected to an antenna radiator through a matching circuit to radiate signals by using the antenna radiator. However, since the signals generated by the signal source are in a certain frequency band, the matching circuit is difficult to take into account the overall efficiency of the antenna assembly, resulting in poor performance of the antenna assembly. CONTENT OF THE UTILITY MODEL

[0003] To overcome the problems in the related art, the present disclosure provides an antenna assembly and an electronic device.

[0004] According to a first aspect of the present disclosure, an antenna assembly is provided, comprising:

[0005] an antenna radiator;

[0006] a first matching circuit, a first end of the first matching circuit being electrically connected to the antenna radiator;

[0007] a second matching circuit, a first end of the second matching circuit being electrically connected to a second end of the first matching circuit, and a second end of the second matching circuit being configured to be electrically connected to a signal source;

[0008] an impedance adjusting circuit, the impedance adjusting circuit being connected in parallel to the first matching circuit, and the impedance adjusting circuit being configured to adjust an impedance of the first matching circuit.

[0009] In some embodiments of the present disclosure, the impedance adjusting circuit comprises:

[0010] a first passive device, the first passive device being connected in parallel to the first matching circuit.

[0011] In some embodiments of the present disclosure, the first passive device comprises:

[0012] a first capacitor, the first capacitor being connected in parallel to the first matching circuit.

[0013] In some embodiments of the present disclosure, the first matching circuit comprises:

[0014] a second passive device, a first end of the second passive device being electrically connected to the antenna radiator and a first end of the first capacitor, and a second end of the second passive device being electrically connected to the first end of the second matching circuit.

[0015] A third passive device, a first end of the third passive device being electrically connected with the second end of the second passive device, and a second end of the third passive device being configured to be electrically connected with a ground terminal.

[0016] In some embodiments of the present disclosure, the second passive device comprises:

[0017] A second capacitor, a first end of the second capacitor being electrically connected with the antenna radiator and the first end of the first capacitor, and a second end of the second capacitor being electrically connected with the first end of the second matching circuit.

[0018] The third passive device comprises:

[0019] A first inductor, a first end of the first inductor being electrically connected with the second end of the second capacitor, and a second end of the first inductor being configured to be electrically connected with the ground terminal.

[0020] In some embodiments of the present disclosure, the antenna radiator is composed of a side frame, and a button of the electronic device is arranged on an inner side of the side frame; and / or, a working frequency band of the antenna radiator is a middle-high frequency band.

[0021] In some embodiments of the present disclosure, the antenna assembly further comprises:

[0022] A radio frequency switch, a first switch in the radio frequency switch being electrically connected between the impedance adjustment circuit and the first matching circuit.

[0023] In some embodiments of the present disclosure, the antenna assembly further comprises:

[0024] A second inductor, a first end of the second inductor being electrically connected with the second end of the first matching circuit through a second switch in the radio frequency switch, and a second end of the second inductor being configured to be electrically connected with a ground terminal.

[0025] A third inductor, a first end of the third inductor being electrically connected with the second end of the first matching circuit through a third switch in the radio frequency switch, and a second end of the third inductor being configured to be electrically connected with the ground terminal.

[0026] A third capacitor, a first end of the third capacitor being electrically connected with the second end of the first matching circuit through a fourth switch in the radio frequency switch, and a second end of the third capacitor being electrically connected with a third end of the second matching circuit.

[0027] In some embodiments of the present disclosure, the second matching circuit comprises:

[0028] A fourth capacitor, a first end of the fourth capacitor being electrically connected with the second end of the first matching circuit, and a second end of the fourth capacitor being electrically connected with the second end of the third capacitor.

[0029] The fourth inductor, the first end of which is electrically connected to the second end of the fourth capacitor, and the second end of which is used to be electrically connected to the signal source;

[0030] The fifth capacitor has its first terminal electrically connected to the second terminal of the fourth inductor, and its second terminal is used to be electrically connected to the ground terminal.

[0031] According to a second aspect of this disclosure, an electronic device is provided, the electronic device including the antenna assembly as described above.

[0032] The technical solutions provided by the embodiments of this disclosure may include the following beneficial effects:

[0033] The antenna assembly includes an antenna radiator, a first matching circuit, a second matching circuit, and an impedance adjustment circuit. The antenna radiator is electrically connected to the signal source through the first and second matching circuits, and the impedance adjustment circuit is connected in parallel with the first matching circuit. By adjusting the impedance of the first matching circuit, the tuning bandwidth of the antenna assembly can be increased, thereby increasing the overall efficiency of the antenna assembly within a certain frequency band and improving the performance of the antenna assembly.

[0034] It should be understood that the above general description and the following detailed description are exemplary and explanatory only, and are not intended to limit this disclosure. Attached Figure Description

[0035] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with the present invention and, together with the description, serve to explain the principles of the present invention.

[0036] Figure 1 This is a schematic diagram of the structure of an antenna assembly provided in an exemplary embodiment of the present disclosure;

[0037] Figure 2 This is a schematic diagram of the structure of an antenna assembly provided in another exemplary embodiment of this disclosure;

[0038] Figure 3 This is a schematic diagram of the structure of an antenna assembly provided in another exemplary embodiment of this disclosure;

[0039] Figure 4 This is a schematic diagram of the structure of an antenna assembly provided in another exemplary embodiment of this disclosure;

[0040] Figure 5 This is a schematic diagram of the efficiency curve of an antenna assembly provided in an exemplary embodiment of this disclosure;

[0041] Figure 6 This is a system block diagram of an electronic device provided in an exemplary embodiment of the present disclosure.

[0042] In the picture:

[0043] 10 - Antenna radiator; 20 - First matching circuit; 30 - Second matching circuit; 40 - Impedance adjustment circuit; 50 - RF switch; 51 - First switch; 52 - Second switch; 53 - Third switch; 54 - Fourth switch; 400 - Electronic device; 402 - Processing component; 404 - Memory; 406 - Power supply component; 408 - Multimedia component; 410 - Audio component; 412 - Input / output interface; 414 - Sensor component; 416 - Communication component; 420 - Processor; L1 - First inductor; L2 - Second inductor; L3 - Third inductor; L4 - Fourth inductor; C1 - First capacitor; C2 - Second capacitor; C3 - Third capacitor; C4 - Fourth capacitor; C5 - Fifth capacitor; S - Signal source; GND - Ground terminal. Detailed Implementation

[0044] Exemplary embodiments will now be described in detail, examples of which are illustrated in the accompanying drawings. When the following description relates to the drawings, unless otherwise indicated, the same numbers in different drawings denote the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with this invention. Rather, they are merely examples of apparatuses and methods consistent with some aspects of this invention as detailed in the appended claims. It should also be understood that the term “and / or” as used herein refers to and includes any or all possible combinations of one or more of the associated listed items.

[0045] In electronic devices, signal sources transmit signals of different frequency bands to antenna radiators to meet the multi-band communication needs of electronic devices. For example, 2G signals can meet the needs of voice communication and SMS services, 3G signals can meet the needs of video calls, 4G signals can meet the needs of high-definition video transmission, and 5G signals can meet the needs of ultra-high-definition video transmission and immersive games.

[0046] In related technologies, an antenna assembly is provided, including an antenna radiator and a matching circuit. The matching circuit is electrically connected between the antenna radiator and the signal source. Since the matching circuit is used for impedance matching, it can reduce energy loss, thereby improving the quality of signal radiation. However, because the matching circuit can only achieve impedance matching in a specific frequency band, when the frequency band of the signal generated by the signal source deviates from this band, the quality of signal radiation deteriorates. Therefore, within a certain frequency band, the matching circuit cannot maintain the overall efficiency of the antenna assembly, resulting in poor antenna assembly performance.

[0047] Based on this, this disclosure provides an antenna assembly that, by adding an impedance adjustment circuit, can adjust the impedance of a first matching circuit, thereby performing impedance matching together with the first matching circuit. By using the impedance adjustment circuit and the first matching circuit for impedance matching, the tuning bandwidth of the antenna assembly can be increased, ensuring the overall efficiency of the antenna assembly within a certain frequency band, thus improving the performance of the antenna assembly.

[0048] An exemplary embodiment of this disclosure provides an antenna assembly, such as Figure 1 As shown, the antenna assembly includes an antenna radiator 10, a first matching circuit 20, a second matching circuit 30, and an impedance adjustment circuit 40. A first terminal of the first matching circuit 20 is electrically connected to the antenna radiator 10. A first terminal of the second matching circuit 30 is electrically connected to a second terminal of the first matching circuit 20, and the second terminal of the second matching circuit 30 is used to electrically connect to a signal source S. The impedance adjustment circuit 40 is connected in parallel with the first matching circuit 20, and the impedance adjustment circuit 40 is used to adjust the impedance of the first matching circuit 20.

[0049] In this embodiment, the antenna assembly includes an antenna radiator, a first matching circuit, a second matching circuit, and an impedance adjustment circuit. The antenna radiator is electrically connected to the signal source through the first and second matching circuits, and the impedance adjustment circuit is connected in parallel with the first matching circuit. By adjusting the impedance of the first matching circuit through the impedance adjustment circuit, the tuning bandwidth of the antenna assembly can be increased, thereby increasing the overall efficiency of the antenna assembly within a certain frequency band and improving the performance of the antenna assembly.

[0050] For example, the conductive frame in an electronic device includes a conductive border and a frame body. The antenna radiator 10 may be composed of the conductive border.

[0051] In one embodiment, the impedance adjustment circuit 40 includes a first passive device. The first passive device is connected in parallel with the first matching circuit 20.

[0052] In this embodiment, passive devices do not consume additional power and can perform impedance adjustment to improve the efficiency of the antenna assembly at different frequency bands. By using the first passive device to construct the impedance adjustment circuit, the tuning bandwidth of the antenna assembly can be increased without generating additional power consumption, thereby balancing the overall efficiency of the antenna assembly within a certain frequency band and improving the performance of the antenna assembly.

[0053] For example, the number of first passive devices can be one or more. When there are multiple first passive devices, each first passive device is combined in series and / or in parallel, and then connected in parallel with the first matching circuit 20.

[0054] It is understandable that the impedance adjustment circuit may include not only the first passive device but also an RF switch. After each switch in the RF switch is electrically connected to its corresponding first passive device, the entire circuit is connected in parallel with the first matching circuit 20.

[0055] In one embodiment, such as Figure 2 As shown, the first passive device includes a first capacitor C1. The first capacitor C1 is connected in parallel with the first matching circuit 20.

[0056] In this embodiment, since the first capacitor is connected in parallel with the first matching circuit, the capacitance of the first matching circuit is increased, thereby increasing the tuning bandwidth of the antenna assembly and improving the efficiency of the antenna assembly between 1.9 GHz and 2.5 GHz, thus enhancing the performance of the antenna assembly. Simultaneously, because the first capacitor has a simple structure, it only needs to be connected in parallel with the first matching circuit to adjust the impedance of the first matching circuit, thereby reducing the complexity of the antenna assembly structure.

[0057] For example, the capacitance value of the first capacitor C1 can be 1.5pF, 2pF, 2.5pF, etc.

[0058] In one embodiment, the first matching circuit 20 includes a second passive device and a third passive device. The first terminal of the second passive device is electrically connected to both the antenna radiator 10 and the first terminal of the first capacitor C1, and the second terminal of the second passive device is electrically connected to the first terminal of the second matching circuit 30. The first terminal of the third passive device is electrically connected to the second terminal of the second passive device, and the second terminal of the third passive device is used for electrical connection to the ground terminal GND.

[0059] In this embodiment, passive devices do not consume additional power and can perform impedance matching, thereby improving the efficiency of the antenna assembly in the corresponding frequency band. By using a second and a third passive device to construct the first matching circuit, the tuning bandwidth of the antenna assembly can be increased without generating additional power consumption, ensuring that the efficiency of the antenna assembly in the corresponding frequency band meets the requirements, thus improving the performance of the antenna assembly.

[0060] For example, the number of second and / or third passive devices can be one or more. When there are multiple second and / or third passive devices, the individual second and / or third passive devices are combined in series and / or in parallel and then connected in parallel with the impedance adjustment circuit 40.

[0061] In one embodiment, the second passive device includes a second capacitor C2. The first terminal of the second capacitor C2 is electrically connected to both the antenna radiator 10 and the first terminal of the first capacitor C1, and the second terminal of the second capacitor C2 is electrically connected to the first terminal of the second matching circuit 30. The third passive device includes a first inductor L1. The first terminal of the first inductor L1 is electrically connected to the second terminal of the second capacitor C2, and the second terminal of the first inductor L1 is used to be electrically connected to the ground terminal GND.

[0062] In this embodiment, because the conductive frame constituting the antenna radiator may be relatively long, the initial loop in the mid-high frequency band (MHB) is biased towards lower frequencies, making it difficult to tune signals in some frequency bands (such as B40 and B41 bands). By connecting a second capacitor in series between the antenna radiator and the second matching circuit, tuning of signals in some frequency bands is facilitated, increasing the tuning bandwidth of the antenna assembly and thus improving its performance. By connecting a first inductor in parallel, impedance matching for the corresponding frequency band can be performed, increasing the tuning bandwidth of the antenna assembly and further improving its performance. Simultaneously, by connecting the first and second capacitors in parallel, the equivalent capacitance of the first matching circuit is further increased, thereby increasing the tuning bandwidth of the antenna assembly and improving its efficiency. Moreover, because the capacitors and inductors have simple structures, impedance matching can be achieved simply by electrical connection, thus reducing the complexity of the antenna assembly structure.

[0063] For example, the capacitance value of the second capacitor C2 can be 1pF, 1.2pF, 1.5pF, etc. The inductance value of the first inductor L1 can be 4.5nH, 4.7nH, 4.9nH, etc.

[0064] In one embodiment, the antenna radiator 10 is composed of a side frame, and the buttons of the electronic device are located inside the side frame.

[0065] In this embodiment, due to the limited length of the side frame containing the buttons, the side frame constituting the antenna radiator is relatively long, resulting in lower efficiency of the antenna assembly between 1.9 GHz and 2.5 GHz. By adjusting the impedance of the first matching circuit through an impedance adjustment circuit, the adjusted impedance can increase the tuning bandwidth of the antenna assembly, thereby increasing the efficiency of the antenna assembly between 1.9 GHz and 2.5 GHz to balance the overall efficiency and improve the performance of the antenna assembly.

[0066] For example, the side border is a portion of the border within the conductive border.

[0067] In one embodiment, the antenna radiator 10 operates in the mid-to-high frequency band.

[0068] In this embodiment, since the mid-to-high frequency signals involve a wide frequency range, impedance matching using only the first and second matching circuits can easily result in low efficiency in some frequency bands. By adjusting the impedance of the first matching circuit using an impedance adjustment circuit, the adjusted impedance can increase the tuning bandwidth of the antenna assembly, making the overall efficiency of the antenna assembly more balanced in the mid-to-high frequency range, thereby improving the performance of the antenna assembly.

[0069] In one embodiment, the antenna radiator 10 is composed of a side frame, and the buttons of the electronic device are located inside the side frame. The antenna radiator 10 operates in the mid-to-high frequency band.

[0070] In this embodiment, due to the limited length of the side frame containing the buttons, the side frame constituting the antenna radiator is relatively long, resulting in lower efficiency of the antenna assembly in the mid-to-high frequency band (1.9 GHz to 2.5 GHz). By adjusting the impedance of the first matching circuit through an impedance adjustment circuit, the adjusted impedance can increase the tuning bandwidth of the antenna assembly, thereby increasing the efficiency of the antenna assembly in the 1.9 GHz to 2.5 GHz range to balance the overall efficiency in the mid-to-high frequency band and thus improve the performance of the antenna assembly.

[0071] In one embodiment, such as Figure 3 As shown, the antenna assembly also includes an RF switch 50. The first switch 51 of the RF switch 50 is electrically connected between the impedance adjustment circuit 40 and the first matching circuit 20.

[0072] In this embodiment, by electrically connecting the first switch between the impedance adjustment circuit and the first matching circuit, the impedance adjustment circuit, under the control of the first switch, can selectively adjust the impedance of the first matching circuit. By using the first switch circuit to select the impedance adjustment circuit to increase the tuning bandwidth of the antenna assembly, the impedance adjustment circuit can be prevented from affecting the efficiency of the antenna assembly in certain frequency bands, thereby improving the performance of the antenna assembly.

[0073] In one embodiment, the antenna assembly further includes a second inductor L2, a third inductor L3, and a third capacitor C3. The first terminal of the second inductor L2 is electrically connected to the second terminal of the first matching circuit 20 via a second switch 52 in the RF switch 50, and the second terminal of the second inductor L2 is used to be electrically connected to the ground terminal GND. The first terminal of the third inductor L3 is electrically connected to the second terminal of the first matching circuit 20 via a third switch 53 in the RF switch 50, and the second terminal of the third inductor L3 is used to be electrically connected to the ground terminal GND. The first terminal of the third capacitor C3 is electrically connected to the second terminal of the first matching circuit 20 via a fourth switch 54 in the RF switch 50, and the second terminal of the third capacitor C3 is electrically connected to the third terminal of the second matching circuit 30.

[0074] In this embodiment, the inductor and capacitor have simple structures and can be tuned in different frequency bands in conjunction with the RF switch, thereby reducing the complexity of the antenna assembly structure. Furthermore, the presence of a second capacitor in series in the first matching circuit narrows the bandwidth of the antenna assembly. Selecting the third capacitor using the fourth switch increases the capacitance value of the second matching circuit, expanding the bandwidth and improving the performance of the antenna assembly. Simultaneously, by turning on the first and / or fourth switches and one of the second and third switches using the RF switch, tuning can be performed in five different ways, increasing the tuning bandwidth of the antenna assembly and further improving its performance.

[0075] For example, the capacitance value of the third capacitor C3 can be 1.0pF, 1.5pF, 2.0pF, etc. The inductance value of the second inductor L2 can be 6nH, 6.2nH, 6.8nH, etc. The inductance value of the third inductor L3 can be 13nH, 15nH, 17nH, etc.

[0076] In one embodiment, the second matching circuit 30 includes a fourth capacitor C4, a fourth inductor L4, and a fifth capacitor C5. The first terminal of the fourth capacitor C4 is electrically connected to the second terminal of the first matching circuit 20, and the second terminal of the fourth capacitor C4 is electrically connected to the second terminal of the third capacitor C3. The first terminal of the fourth inductor L4 is electrically connected to the second terminal of the fourth capacitor C4, and the second terminal of the fourth inductor L4 is used for electrical connection to the signal source S. The first terminal of the fifth capacitor C5 is electrically connected to the second terminal of the fourth inductor L4, and the second terminal of the fifth capacitor C5 is used for electrical connection to the ground terminal GND.

[0077] In this embodiment, by connecting a capacitor in series between the signal source and the second matching circuit, and connecting the third capacitor in parallel with the fourth capacitor after the fourth switch is turned on to increase the corresponding capacitance value, the bandwidth of the antenna radiator is expanded. Moreover, since the structure of capacitors and inductors is simple, using the fourth capacitor, the fourth inductor, and the fifth capacitor to form the second matching circuit reduces the complexity of the antenna component structure.

[0078] For example, the capacitance value of the fourth capacitor C4 can be 0.7pF, 0.9pF, 1.0pF, etc. The capacitance value of the fifth capacitor C5 can be 0.7pF, 0.9pF, 1.0pF, etc. The inductance value of the fourth inductor L4 can be 2nH, 2.2nH, 2.5nH, etc.

[0079] It is understood that the structure of the second matching circuit 30 is not limited to the structure described above, and can also be other structures with inductors and / or capacitors connected in series and parallel, which are not limited here.

[0080] An exemplary embodiment of this disclosure provides an antenna assembly, such as Figure 4As shown, the antenna assembly includes an antenna radiator 10, a first inductor L1, a fourth inductor L4, a first capacitor C1, a second capacitor C2, a fourth capacitor C4, and a fifth capacitor C5. The first terminal of the first capacitor C1 is electrically connected to the first terminal of the second capacitor C2 and the feed point of the antenna radiator 10. The second terminal of the first capacitor C1 is electrically connected to the second terminal of the second capacitor C2, the first terminal of the first inductor L1, and the first terminal of the fourth capacitor C4. The second terminal of the fourth capacitor C4 is electrically connected to the first terminal of the fourth inductor L4, and the second terminal of the fourth inductor L4 is electrically connected to the first terminal of the fifth capacitor C5 and the signal source S. The second terminals of the first inductor L1, the fifth capacitor C5, and the grounding point of the antenna radiator 10 are all used to be electrically connected to the ground terminal GND. The capacitance values ​​of the first capacitor C1 and C2 are 2.5 pF, 1 pF, 0.9 pF, and 0.9 pF, respectively. The inductance of the first inductor L1 is 4.7nH, and the inductance of the fourth inductor L4 is 2.2nH.

[0081] In this embodiment, by connecting the first capacitor and the second capacitor in parallel, the capacitance between the antenna radiator and the signal source can be increased, thereby increasing the tuning bandwidth of the antenna assembly and improving the performance of the antenna assembly in a certain frequency band.

[0082] For example, the third capacitor C3 can be connected in parallel across the two ends of the fourth capacitor C4.

[0083] For example, such as Figure 5 As shown, S1 represents the efficiency curve of the antenna assembly without the first capacitor C1, and S2 represents the efficiency curve of the antenna assembly with the first capacitor C1 added. The vertical axis represents efficiency in dB, and the horizontal axis represents frequency in GHz. Compared to S1, S2 exhibits less fluctuation, and the efficiency in the frequency band between 1.9 GHz and 2.5 GHz is significantly improved. This indicates that for antenna assemblies without the RF switch 50, sacrificing peak efficiency in some frequency bands to improve overall efficiency results in a more balanced overall efficiency for the antenna assembly.

[0084] An exemplary embodiment of this disclosure provides an antenna assembly, such as Figure 3As shown, the antenna assembly includes an antenna radiator 10, a first inductor L1, a second inductor L2, a third inductor L3, a fourth inductor L4, a first capacitor C1, a second capacitor C2, a third capacitor C3, a fourth capacitor C4, a fifth capacitor C5, and an RF switch 50. The first terminal of the first capacitor C1 is electrically connected to the first terminal of the second capacitor C2 and the feed point of the antenna radiator 10. The second terminal of the first capacitor C1 is electrically connected to the second terminal of the second capacitor C2, the first terminal of the first inductor L1, and the first terminal of the fourth capacitor C4 via the first switch 51 in the RF switch 50. The first terminal of the second inductor L2 is electrically connected to the second terminal of the second capacitor C2 via the second switch 52 in the RF switch 50. The first terminal of the third inductor L3 is electrically connected to the second terminal of the second capacitor C2 via the third switch 53 in the RF switch 50. The first terminal of the third capacitor C3 is electrically connected to the second terminal of the second capacitor C2 via the fourth switch 54 in the RF switch 50. The second terminal of the third capacitor C3 is also electrically connected to the second terminal of the fourth capacitor C4 and the first terminal of the fourth inductor L4. The second terminal of the fourth inductor L4 is electrically connected to the first terminal of the fifth capacitor C5 and the signal source S. The second terminal of the first inductor L1, the second terminal of the second inductor L2, the second terminal of the third inductor L3, the second terminal of the fifth capacitor C5, and the grounding point of the antenna radiator 10 are all used to be electrically connected to the ground terminal GND. The capacitance values ​​of the first capacitor C1, second capacitor C2, third capacitor C3, fourth capacitor C4, and fifth capacitor C5 are all 2.5pF, 1pF, 1.5pF, 0.9pF, and 0.9pF respectively. The inductance values ​​of the first inductor L1, second inductor L2, third inductor L3, and fourth inductor L4 are all 4.7nH, 6.2nH, 15nH, and 2.2nH respectively.

[0085] In this embodiment, by connecting the first and second capacitors in parallel, and the third and fourth capacitors in parallel, the capacitance between the antenna radiator and the signal source can be increased, thereby increasing the tuning bandwidth of the antenna assembly and improving its performance within a certain frequency band. Furthermore, by switching the RF switch on and off, the impedance between the antenna radiator and the signal source can be adjusted in five different ways: the RF switch can be on with the first switch on, and the second switch on while the third and fourth switches are off; the third switch on while the second and fourth switches are off; the fourth switch on while the second and third switches are off; the RF switch can be on with the fourth switch on, and the second switch on while the first and third switches are off; and the third switch on while the first and second switches are off. By adjusting the impedance between the antenna radiator and the signal source in five different ways, optimal impedance matching can be achieved in all frequency bands, increasing the tuning bandwidth of the antenna assembly and thus improving its performance.

[0086] For example, such as Figure 5As shown, S3 to S8 represent the efficiency curves of the antenna assembly at different frequency bands. S3 represents the efficiency curve of the receiving band (B1RX2) in the B1 band, S4 represents the efficiency curve of the transmitting band (B1TX2) in the B1 band, S5 represents the efficiency curve of the first receiving band (B3RX2) in the B3 band, S6 represents the efficiency curve of the second receiving band (B3RX) in the B3 band, S7 represents the efficiency curves of the transmitting band (B3TX) and the B41 band, and S8 represents the efficiency curve of the B40 band (B40). The vertical axis represents efficiency in dB, and the horizontal axis represents frequency in GHz. By switching the RF switch 50, the efficiency of the antenna assembly in different frequency bands can be maintained at a high level, increasing the tuning bandwidth of the antenna assembly and thus improving its performance. Figure 5 The numbers 1 to 16 in the figure represent the efficiency of the corresponding efficiency curve at different frequencies.

[0087] An exemplary embodiment of this disclosure provides an electronic device that includes an antenna assembly as described above.

[0088] refer to Figure 6 As shown, the electronic device 400 may include one or more of the following components: a processing component 402, a memory 404, a power supply component 406, a multimedia component 408, an audio component 410, an input / output (I / O) interface 412, a sensor component 414, and a communication component 416.

[0089] Processing component 402 typically controls the overall operation of electronic device 400, such as operations associated with display, telephone calls, data communication, camera operation, and recording. Processing component 402 may include one or more processors 420 to execute instructions to perform all or part of the steps of the methods described above. Furthermore, processing component 402 may include one or more modules to facilitate interaction between processing component 402 and other components. For example, processing component 402 may include a multimedia module to facilitate interaction between multimedia component 408 and processing component 402.

[0090] Memory 404 is configured to store various types of data to support the operation of electronic device 400. Examples of this data include instructions for any application or method operating on electronic device 400, contact data, phonebook data, messages, pictures, videos, etc. Memory 404 can be implemented by any type of volatile or non-volatile storage terminal or a combination thereof, such as static random access memory (SRAM), electrically erasable programmable read-only memory (EEPROM), erasable programmable read-only memory (EPROM), programmable read-only memory (PROM), read-only memory (ROM), magnetic storage, flash memory, magnetic disk, or optical disk.

[0091] Power supply component 406 provides power to various components of electronic device 400. Power supply component 406 may include a power management system, one or more power supplies, and other components associated with generating, managing, and distributing power to electronic device 400.

[0092] Multimedia component 408 includes a screen that provides an output interface between electronic device 400 and user. In some embodiments, the screen may include a liquid crystal display (LCD) and a touch panel (TP). If the screen includes a touch panel, the screen may be implemented as a touchscreen to receive input signals from the user. The touch panel includes one or more touch sensors to sense touches, swipes, and gestures on the touch panel. The touch sensors may sense not only the boundaries of touch or swipe actions but also the duration and pressure associated with the touch or swipe operation. In some embodiments, multimedia component 408 includes a front-facing camera module and / or a rear-facing camera module. When electronic device 400 is in an operating mode, such as shooting mode or video mode, the front-facing camera module and / or rear-facing camera module may receive external multimedia data. Each front-facing camera module and rear-facing camera module may be a fixed optical lens system or have focal length and optical zoom capabilities.

[0093] Audio component 410 is configured to output and / or input audio signals. For example, audio component 410 includes a microphone (MIC) configured to receive external audio signals when electronic device 400 is in an operating mode, such as call mode, recording mode, and voice recognition mode. The received audio signals may be further stored in memory 404 or transmitted via communication component 416. In some embodiments, audio component 410 also includes a speaker for outputting audio signals.

[0094] I / O interface 412 provides an interface between processing component 402 and peripheral interface modules, such as keyboards, click wheels, buttons, etc. These buttons may include, but are not limited to, home buttons, volume buttons, power buttons, and lock buttons.

[0095] Sensor assembly 414 includes one or more sensors for providing state assessments of various aspects of electronic device 400. For example, sensor assembly 414 may detect the on / off state of electronic device 400, the relative positioning of components such as the display and keypad of electronic device 400, changes in position of electronic device 400 or a component of electronic device 400, the presence or absence of user contact with electronic device 400, orientation or acceleration / deceleration of electronic device 400, and temperature changes of electronic device 400. Sensor assembly 414 may include a proximity sensor configured to detect the presence of nearby objects without any physical contact. Sensor assembly 414 may also include a light sensor, such as a CMOS or CCD image sensor, for use in imaging applications. In some embodiments, sensor assembly 414 may also include an accelerometer, gyroscope, magnetometer, pressure sensor, or temperature sensor.

[0096] Communication component 416 is configured to facilitate wired or wireless communication between electronic device 400 and other terminals. Electronic device 400 can access wireless networks based on communication standards, such as WiFi, 2G, 3G, 4G, 5G, or combinations thereof. In one exemplary embodiment, communication component 416 receives broadcast signals or broadcast-related information from an external broadcast management system via a broadcast channel. In one exemplary embodiment, communication component 416 also includes a near-field communication (NFC) module to facilitate short-range communication. For example, the NFC module may be implemented based on radio frequency identification (RFID) technology, Infrared Data Association (IrDA) technology, ultra-wideband (UWB) technology, Bluetooth (BT) technology, and other technologies.

[0097] In an exemplary embodiment, the electronic device 400 may be implemented by one or more application-specific integrated circuits (ASICs), digital signal processors (DSPs), digital signal processing terminals (DSPDs), programmable logic devices (PLDs), field-programmable gate arrays (FPGAs), controllers, microcontrollers, microprocessors, or other electronic components.

[0098] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this disclosure. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0099] Furthermore, the terms "first" and "second" are used for descriptive purposes only 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 disclosure, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0100] Other embodiments of this disclosure will readily occur to those skilled in the art upon consideration of the specification and practice of the utility models disclosed herein. This disclosure is intended to cover any variations, uses, or adaptations of this disclosure that follow the general principles of this disclosure and include common knowledge or customary techniques in the art not disclosed herein. The specification and examples are to be considered exemplary only, and the true scope and spirit of this disclosure are indicated by the following claims.

[0101] It should be understood that this disclosure is not limited to the precise structures described above and shown in the accompanying drawings, and various modifications and changes can be made without departing from its scope. The scope of this disclosure is limited only by the appended claims.

Claims

1. An antenna assembly, characterized in that, The antenna assembly includes: Antenna radiator; A first matching circuit, wherein a first terminal of the first matching circuit is electrically connected to the antenna radiator; A second matching circuit, wherein the first terminal of the second matching circuit is electrically connected to the second terminal of the first matching circuit, and the second terminal of the second matching circuit is used to be electrically connected to a signal source; An impedance adjustment circuit is provided, which is connected in parallel with the first matching circuit. The impedance adjustment circuit is used to adjust the impedance of the first matching circuit.

2. The antenna assembly according to claim 1, characterized in that, The impedance adjustment circuit includes: The first passive device is connected in parallel with the first matching circuit.

3. The antenna assembly according to claim 2, characterized in that, The first passive device includes: The first capacitor is connected in parallel with the first matching circuit.

4. The antenna assembly according to claim 3, characterized in that, The first matching circuit includes: The second passive device has its first end electrically connected to both the antenna radiator and the first end of the first capacitor, and its second end electrically connected to the first end of the second matching circuit. The third passive device has a first end electrically connected to the second end of the second passive device, and the second end of the third passive device is used to be electrically connected to the ground terminal.

5. The antenna assembly according to claim 4, characterized in that, The second passive device includes: The second capacitor has its first terminal electrically connected to both the antenna radiator and the first terminal of the first capacitor, and its second terminal is electrically connected to the first terminal of the second matching circuit. The third passive device includes: A first inductor, the first end of which is electrically connected to the second end of the second capacitor, and the second end of which is electrically connected to the ground terminal.

6. The antenna assembly according to claim 1, characterized in that, The antenna radiator is composed of a side frame, and the buttons of the electronic device are located on the inside of the side frame; and / or, the operating frequency band of the antenna radiator is the mid-to-high frequency band.

7. The antenna assembly according to any one of claims 1 to 6, characterized in that, The antenna assembly also includes: A radio frequency switch, wherein the first switch of the radio frequency switch is electrically connected between the impedance adjustment circuit and the first matching circuit.

8. The antenna assembly according to claim 7, characterized in that, The antenna assembly also includes: The second inductor has its first end electrically connected to the second end of the first matching circuit via a second switch in the radio frequency switch, and its second end is used to be electrically connected to the ground terminal. The third inductor has its first end electrically connected to the second end of the first matching circuit via the third switch in the radio frequency switch, and its second end is used to be electrically connected to the ground terminal. The third capacitor has its first terminal electrically connected to the second terminal of the first matching circuit via the fourth switch in the radio frequency switch, and its second terminal electrically connected to the third terminal of the second matching circuit.

9. The antenna assembly according to claim 8, characterized in that, The second matching circuit includes: The fourth capacitor has its first terminal electrically connected to the second terminal of the first matching circuit, and its second terminal electrically connected to the second terminal of the third capacitor. The fourth inductor, the first end of which is electrically connected to the second end of the fourth capacitor, and the second end of which is used to be electrically connected to the signal source; The fifth capacitor has its first terminal electrically connected to the second terminal of the fourth inductor, and its second terminal is used to be electrically connected to the ground terminal.

10. An electronic device, characterized in that, The electronic device includes an antenna assembly as described in any one of claims 1 to 9.

Images