Antenna assembly and electronic equipment

Abstract

The invention relates to an antenna assembly and electronic equipment, the antenna assembly comprises a first radiation arm and a second radiation arm which are arranged at an interval, the working frequency band of the first radiation arm at least covers a first frequency band, and the working frequency band of the second radiation arm at least covers a second frequency band. The part where the radiation frequency band of the first radiation arm in the frequency multiplication mode coincides with the second frequency band is a third frequency band, and the radiation efficiency of the first radiation arm when the third frequency band is radiated is smaller than that of the second radiation arm when the third frequency band is radiated. By reasonably adjusting the radiation efficiency of the first radiation arm, the radiation efficiency of the first radiation arm in radiating the third frequency band can be reduced on the premise that the first radiation arm meets the radiation efficiency of the working frequency band of the first radiation arm, so that the influence of the first radiation arm on the second radiation arm in a frequency multiplication mode is reduced, and the radiation efficiency of the second radiation arm is improved. The isolation between the first radiation arm and the second radiation arm can be improved, and the whole antenna assembly can have good radiation efficiency and communication effect.

Description

Technical Field

[0001] The present disclosure relates to the field of antenna technology, and more particularly, to an antenna assembly and an electronic device. Background Art

[0002] With the continuous evolution of communication technology, the antenna frequency bands of electronic devices (such as smart phones, etc.) have become increasingly diverse. In order to ensure that electronic devices have good radiation performance in various scenarios, multiple antennas are usually provided in current electronic devices to cover different frequency bands respectively. For example, an antenna for covering a relatively low frequency band (LB band) and an antenna for covering a relatively high frequency band (such as MHB band) are provided in an electronic device. However, the signal of the antenna with a relatively low frequency band (such as LB antenna) sometimes interferes with the signal radiated by the antenna with a relatively high frequency band (such as MHB antenna), affecting the operation of the MHB antenna. Summary of the Invention

[0003] The present disclosure provides an antenna assembly and an electronic device to at least partially overcome the problems existing in the related art.

[0004] According to a first aspect of the present disclosure, there is provided an antenna assembly, the antenna assembly including a first radiation arm and a second radiation arm arranged at intervals, the operating frequency band of the first radiation arm covering at least a first frequency band, and the operating frequency band of the second radiation arm covering at least a second frequency band;

[0005] The overlapping part of the frequency band radiated by the first radiation arm in the harmonic mode and the second frequency band is a third frequency band;

[0006] The radiation efficiency of the first radiation arm when radiating the third frequency band is less than the radiation efficiency of the second radiation arm when radiating the third frequency band.

[0007] Optionally, the antenna assembly further includes a tuning structure;

[0008] The tuning structure is connected to the first radiation arm, and the tuning structure is used to adjust the radiation frequency band of the first radiation arm and to make the radiation efficiency of the first radiation arm less than the radiation efficiency of the second radiation arm when both the first radiation arm and the second radiation arm radiate the third frequency band.

[0009] Optionally, the tuning structure has at least one capacitor and at least one inductor;

[0010] The capacitor and the inductor are arranged in parallel, one end of the capacitor and one end of the inductor are both connected to the first radiation arm, and the other end of the capacitor and the other end of the inductor are both grounded.

[0011] Optionally, the at least one inductor includes a first inductor, a second inductor, and a third inductor, and the inductance values of the first inductor, the second inductor, and the third inductor are different;

[0012] The first inductor, the second inductor, the third inductor, and the capacitor are arranged in parallel.

[0013] Optionally, the first inductor, the second inductor, and the third inductor are used to tune the first radiation arm so that the operating frequency band of the first radiation arm can cover the LB band.

[0014] Optionally, the capacitor is used to tune the first radiation arm so that the first radiation arm can have the frequency doubling mode.

[0015] Optionally, the first inductor, the second inductor, the third inductor, and the capacitor are all connected to the first radiation arm through a tuning circuit; and / or,

[0016] The first inductor, the second inductor, the third inductor, and the capacitor are all grounded through a grounding circuit.

[0017] Optionally, the second frequency band is the MHB band.

[0018] Optionally, the first radiation arm includes a first radiation section and a second radiation section;

[0019] There is a first gap between the first radiation section and the second radiation section. The first radiation section is connected to a first feeding point, the second radiation section is connected to a first grounding point, and the second radiation section and the first radiation section are coupled and fed through the first gap.

[0020] Optionally, the antenna assembly further includes a parasitic structure, and the parasitic structure is used to be arranged between the first radiation arm and the second radiation arm;

[0021] The parasitic structure includes a parasitic radiator located between the first radiation arm and the second radiation arm. There is a second gap between the parasitic radiator and the second radiation arm. The parasitic radiator is coupled and fed with the second radiation arm through the second gap. There is a third gap between the parasitic radiator and the first radiation arm.

[0022] Optionally, the second radiation arm is connected to a second feeding point and a second grounding point;

[0023] Along the direction from the first radiation arm to the second radiation arm, the length of the parasitic radiator is less than the length of the second radiation arm.

[0024] Optionally, the parasitic structure further includes a parasitic body, on which the parasitic radiator is formed. The parasitic radiator is located on a side of the parasitic body close to the second radiating arm, and the parasitic radiator is coupled and fed through the third gap to the second radiating arm;

[0025] One end of the parasitic body is connected to the parasitic radiator, and the other end of the parasitic body is grounded.

[0026] Optionally, the parasitic radiator is coupled and fed through the third gap to the second radiating arm.

[0027] Optionally, the first radiating arm, the second radiating arm and the parasitic structure are all adapted to be disposed on a side of the electronic device close to the USB module.

[0028] According to a second aspect of the present disclosure, there is provided an electronic device including the antenna assembly as described above.

[0029] Optionally, the electronic device includes a middle frame and a USB module;

[0030] The first radiating arm and the second radiating arm are part of the middle frame, and the USB module is disposed between the first radiating arm and the second radiating arm.

[0031] Optionally, the electronic device further includes a parasitic structure, which is disposed between the first radiating arm and the second radiating arm, and the parasitic structure and the USB module are arranged in a stacked manner.

[0032] The technical solutions provided by the embodiments of the present disclosure may include the following beneficial effects: Since the radiation efficiency of the first radiating arm when radiating the third frequency band is less than the radiation efficiency of the second radiating arm when radiating the third frequency band, by reasonably adjusting the radiation efficiency of the first radiating arm, it is possible to reduce the radiation efficiency of the first radiating arm when radiating the third frequency band on the premise that the first radiating arm meets the radiation efficiency of its first frequency band, so as to reduce the influence of the first radiating arm on the second radiating arm in the frequency doubling mode, thereby avoiding the efficiency depression of the second radiating arm caused by the interference of the first radiating arm, which is beneficial to improving the isolation degree between the first radiating arm and the second radiating arm, and further enabling the overall antenna assembly to have good radiation efficiency and communication effect.

[0033] It should be understood that the above general description and the following detailed description are only exemplary and explanatory, and cannot limit the present disclosure. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] The accompanying drawings herein are incorporated into the specification and constitute a part of the specification, showing embodiments consistent with the present disclosure, and are used together with the specification to explain the principles of the present disclosure.

[0035] Figure 1 It is a schematic diagram of the radiation efficiency of the first radiation arm of the antenna assembly provided by an exemplary embodiment of the present disclosure.

[0036] Figure 2 It is a schematic diagram of the radiation efficiency of the second radiation arm of the antenna assembly provided by an exemplary embodiment of the present disclosure.

[0037] Figure 3 It is a top view schematic diagram of an antenna assembly provided by an exemplary embodiment of the present disclosure, where the USB module is shown in a dashed box.

[0038] Figure 4 It is a top view schematic diagram of an antenna assembly provided by another exemplary embodiment of the present disclosure, where the USB module is shown in a dashed box.

[0039] Figure 5 It is a schematic diagram of the return loss of the second radiation arm of the antenna assembly provided by an exemplary embodiment of the present disclosure.

[0040] Description of Reference Numerals

[0041] 1 - First radiation arm; 11 - First radiation section; 12 - Second radiation section; 13 - First gap; 14 - First feeding point; 15 - First grounding point; 2 - Second radiation arm; 21 - Second feeding point; 22 - Second grounding point; 3 - Tuning structure; 31 - First inductor; 32 - Second inductor; 33 - Third inductor; 34 - Capacitor; 4 - Tuning circuit; 5 - Lower ground circuit; 6 - Parasitic structure; 61 - Parasitic radiator; 62 - Parasitic body; 63 - Second gap; 64 - Third gap; 10 - USB module. Detailed Embodiments

[0042] The following will describe in detail the specific embodiments of the present disclosure with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are only for explaining and illustrating the present disclosure, and are not used to limit the present disclosure.

[0043] In the present disclosure, unless otherwise stated, the orientation terms such as "upper", "lower", "left", "right", etc. indicate the orientation or positional relationship defined based on the drawing direction shown in the accompanying drawings. It is only for the convenience of describing the present disclosure and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, as well as a specific orientation structure and operation. Therefore, it should not be construed as a limitation of the present disclosure. The terms "inner" and "outer" refer to the inside and outside of the corresponding structural contour.

[0044] In addition, it should be noted that terms such as "first" and "second" are used to distinguish one element from another, and do not have an order or importance. In addition, in the description with reference to the accompanying drawings, the same reference numerals in different drawings represent the same elements.

[0045] In the description of the present disclosure, it should also be noted that unless otherwise clearly specified and limited, the terms "arranged", "connected", "coupled", and "installed" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected, or indirectly connected through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms in the present disclosure can be understood according to specific circumstances.

[0046] It should be noted that all actions of obtaining signals, information, or data in the present disclosure are carried out on the premise of complying with the corresponding data protection regulations and policies of the country where it is located and with the authorization given by the owner of the corresponding device.

[0047] As mentioned above, the signal of the LB antenna sometimes interferes with the signal radiated by the MHB antenna, affecting the operation of the MHB antenna. The applicant found that the reason for this situation is that the frequency band radiated by the LB antenna in its harmonic mode for covering low-frequency signals often overlaps with the frequency band radiated by the MHB antenna. Moreover, due to the strong radiation efficiency of the LB antenna in the harmonic mode, the signal radiated by the LB antenna in the harmonic mode interferes with the signal radiated by the MHB antenna, resulting in poor isolation between the LB antenna and the MHB antenna, thereby affecting the operation of the MHB antenna.

[0048] Reference Figure 1 and Figure 2 As shown, when the operating frequency band of the LB antenna is 0.7 - 1 GHz, the frequency band radiated by the LB antenna in the 3 / 4 harmonic mode is 2.1 - 3 GHz. The frequency band radiated by the LB antenna in the 3 / 4 harmonic mode partially overlaps with the frequency band radiated by the MHB antenna. Since the frequency band radiated by the LB antenna in the harmonic mode partially overlaps with the frequency band radiated by the MHB antenna, and within the overlapping frequency band, the radiation efficiency of the LB antenna is similar to that of the MHB antenna, the LB antenna will interfere with the MHB antenna, and the MHB antenna will have an efficiency depression at the overlapping frequency band. The isolation between the LB antenna and the MHB antenna is poor, and the LB antenna will interfere with the MHB antenna.

[0049] In Figure 1 and Figure 2Among them, the abscissa represents frequency (Frequency) with the unit of GHz, and the ordinate represents the radiation efficiency of the combined antenna (System Rad.Efficiency[Combo]) or the total efficiency of the corresponding antenna in decibels (dB), such as the total efficiency of the low-frequency antenna (System Radiation.Efficiency in dB[Magnitude]) shown in the figure.

[0050] In view of this, as Figure 3 and Figure 4 shown, according to the first aspect of the present disclosure, an antenna assembly is provided. The antenna assembly includes a first radiation arm 1 and a second radiation arm 2 arranged at intervals. The operating frequency band of the first radiation arm 1 at least covers a first frequency band (such as a low-frequency band LB antenna), and the operating frequency band of the second radiation arm 2 at least covers a second frequency band (such as a medium-high frequency MHB antenna). The overlapping part of the frequency band radiated by the first radiation arm 1 in the frequency doubling mode and the second frequency band is the third frequency band, and the radiation efficiency of the first radiation arm 1 when radiating the third frequency band is less than the radiation efficiency of the second radiation arm 2 when radiating the third frequency band.

[0051] In the above antenna assembly, since the operating frequency band of the first radiation arm 1 can at least cover the first frequency band, and the operating frequency band of the second radiation arm 2 can at least cover the second frequency band, the frequency band that the above antenna assembly can radiate is relatively wide. For the implementation of the antenna assembly applied to an electronic device, the antenna assembly can meet the usage requirements of the electronic device.

[0052] In the above antenna assembly, since the radiation efficiency of the first radiation arm 1 when radiating the third frequency band in the frequency doubling mode is less than the radiation efficiency of the second radiation arm 2 when radiating the corresponding third frequency band, in this way, the first radiation arm 1 can generate an efficiency depression when radiating the third frequency band. That is to say, although the frequency band radiated by the first radiation arm 1 in the frequency doubling mode will still partially overlap with the operating frequency band of the second radiation arm 2 (i.e., the second frequency band) (i.e., the third frequency band), due to the low radiation efficiency of the first radiation arm 1 when radiating the third frequency band, there is an efficiency depression in the radiation efficiency of the first radiation arm 1. The signal of the first radiation arm 1 is weak when radiating the third frequency band, and the interference of the first radiation arm 1 to the second radiation arm 2 is small. The signal radiated by the second radiation arm 2 is not easily affected by the interference of the first radiation arm 1 to generate an efficiency depression, and the isolation degree between the first radiation arm 1 and the second radiation arm 2 is high, effectively improving the performance of the antenna assembly.

[0053] The technical solutions provided by the embodiments of the present disclosure may include the following beneficial effects: Since the radiation efficiency of the first radiation arm 1 when radiating the third frequency band is less than the radiation efficiency of the second radiation arm 2 when radiating the third frequency band, by reasonably adjusting the radiation efficiency of the first radiation arm 1, it is possible to reduce the radiation efficiency of the first radiation arm 1 when radiating the third frequency band on the premise that the first radiation arm 1 meets the radiation efficiency of its first frequency band, so as to reduce the influence of the first radiation arm 1 on the second radiation arm 2 in the frequency doubling mode, thereby avoiding the efficiency depression of the second radiation arm 2 caused by the interference of the first radiation arm 1, which is beneficial to improving the isolation degree between the first radiation arm 1 and the second radiation arm 2, and further enabling the overall antenna assembly to have good radiation efficiency and communication effect.

[0054] It can be understood that in addition to the LB frequency band for the first frequency band and the MHB frequency band for the second frequency band, the two can also radiate other suitable frequency bands.

[0055] Here, it should be noted that the antenna assembly provided in the above embodiments can be applied to an electronic device to support the electronic device to implement a wireless communication function. The electronic device here can be a mobile phone, a tablet computer, a personal digital assistant, a virtual reality device, a smart wearable device and other electronic devices. As an exemplary embodiment, the above antenna assembly can be integrated on the metal housing of the electronic device, such as the metal frame or the metal back plate of the electronic device. As another exemplary embodiment, the antenna assembly can be implemented by means of a flexible circuit board or an anodized die-casting molding process. In the embodiment where the antenna assembly is applied to a mobile phone, optionally, the antenna structure can be arranged on the metal frame of the mobile phone. The present disclosure does not limit the specific structure, position and application scenario of the antenna assembly.

[0056] In order to make the radiation efficiency of the first radiation arm 1 less than the radiation efficiency of the second radiation arm 2 when the first radiation arm 1 radiates the third frequency band, optionally, as Figure 3 and Figure 4 shown, the above antenna assembly further includes a tuning structure 3. The tuning structure 3 is connected to the first radiation arm 1. The tuning structure 3 is used to adjust the radiation frequency band of the first radiation arm 1 and is used to make the radiation efficiency of the first radiation arm 1 less than the radiation efficiency of the second radiation arm 2 when both the first radiation arm 1 and the second radiation arm 2 radiate the third frequency band. That is to say, the first radiation arm 1 can be tuned through the tuning structure 3 so that the operating frequency band of the first radiation arm 1 can at least cover the first frequency band, and the radiation efficiency of the first radiation arm 1 when radiating the above third frequency band can be adjusted through the tuning structure 3, thereby reducing the interference of the first radiation arm 1 on the second radiation arm 2 and improving the isolation degree between the first radiation arm 1 and the second radiation arm 2. In other words, the radiation efficiency of the signal radiated by the first radiation arm 1 in the frequency doubling mode can be reduced through the tuning structure 3, thereby suppressing the efficiency depression generated on the second radiation arm 2 at the corresponding frequency band.

[0057] For example, as Figure 1 shown, when the first radiating arm 1 radiates signals in the LB frequency band and the second radiating arm 2 radiates signals in the MHB frequency band, when the first radiating arm 1 radiates signals at a frequency of 2.5 GHz in the frequency doubling mode, the radiation efficiency of the first radiating arm 1 is -3.5 dB (at 2.5 GHz). By adopting the tuning structure 3, the radiation efficiency of the first radiating arm 1 at 2.5 GHz can be reduced to -12.5 dB. The interference of the first radiating arm 1 to the second radiating arm 2 is small, and the isolation degree between the first radiating arm 1 and the second radiating arm 2 is high.

[0058] Here, it can be understood that in addition to the implementation manner of adopting the tuning structure 3 to tune the first radiating arm 1 so that the radiation efficiency of the first radiating arm 1 is less than that of the second radiating arm 2, the antenna assembly provided by the present disclosure can also adopt any other appropriate manner to reduce the radiation efficiency of the first radiating arm 1 when radiating signals in the third frequency band. For example, a shielding cover can be arranged at an appropriate position of the antenna assembly, so that the radiation efficiency of the first radiating arm 1 when radiating signals in the third frequency band is reduced.

[0059] The present disclosure does not limit the specific structure of the tuning structure 3, as long as the tuning structure 3 can tune the first radiating arm 1. As an implementation manner of the present disclosure, as Figure 3 and Figure 4 shown, the tuning structure 3 has at least one capacitor 34 and at least one inductor. The capacitor 34 and the inductor are arranged in parallel. One end of the capacitor 34 and one end of the inductor are both connected to the first radiating arm 1, and the other end of the capacitor 34 and the other end of the inductor are both grounded. In this way, the capacitor 34 and the inductor in the tuning structure 3 can form an LC tuning circuit 4. By reasonably setting the capacitor 34 and the inductor, the first radiating arm 1 can be tuned, so that on the premise that the operating frequency band of the first radiating arm 1 can cover the first frequency band, the interference of the first radiating arm 1 to the second radiating arm 2 in the frequency doubling mode can be reduced, and the radiation ability and radiation efficiency of the antenna assembly can be improved.

[0060] The present disclosure does not limit the number of inductors and capacitors 34, as long as the above-mentioned tuning effect can be achieved. Optionally, the inductor in the tuning structure 3 may include a first inductor 31, a second inductor 32, and a third inductor 33. The inductance values of the first inductor 31, the second inductor 32, and the third inductor 33 are different, and the first inductor 31, the second inductor 32, the third inductor 33, and the capacitor 34 are arranged in parallel. In this way, the first inductor 31, the second inductor 32, the third inductor 33, and the capacitor 34 can respectively form four different tuning branches, and the first inductor 31, the second inductor 32, the third inductor 33, and the capacitor 34 can respectively tune the first radiation arm 1. The first radiation arm 1 can simultaneously radiate signals of multiple different frequencies, which is beneficial to improving the frequency bandwidth of the signals radiated by the first radiation arm 1 on the premise of meeting the working frequency band of the first radiation arm 1.

[0061] The present disclosure does not limit the working frequency band of the first radiation arm 1, as long as the working frequency band of the first radiation arm 1 can meet the usage requirements of the antenna assembly. As an implementation manner of the present disclosure, the first inductor 31, the second inductor 32, and the third inductor 33 are used to tune the first radiation arm 1 so that the working frequency band of the first radiation arm 1 can cover the LB frequency band. Through the cooperation of the first inductor 31, the second inductor 32, and the third inductor 33, the working frequency band of the first radiation arm 1 can cover the LB frequency band (i.e., the low-frequency band, the frequency band range is 0.7-1 GHz), and at the same time, the antenna assembly has good radiation efficiency and communication effect.

[0062] Here, the present disclosure does not limit the tuning method of the harmonic mode of the first radiation arm 1. The first radiation arm 1 can be tuned by combining multiple capacitors 34 and / or inductors with each other to reduce the radiation efficiency of the first radiation arm 1 in the harmonic mode, or can be tuned by a single capacitor 34 and / or inductor. As an implementation manner of the present disclosure, the above-mentioned capacitor 34 is used to tune the first radiation arm 1 so that the first radiation arm 1 can have a harmonic mode. In this way, when the first radiation arm 1 radiates signals in the harmonic mode, the first radiation arm 1 is tuned through the tuning branch provided with the capacitor 34, and the radiation efficiency of the first radiation arm 1 in the harmonic mode is small, thereby reducing the interference of the first radiation arm 1 to the second radiation arm 2 and improving the isolation degree between the first radiation arm 1 and the second radiation arm 2.

[0063] The present disclosure does not limit the connection relationship between the tuning structure 3 and the first radiation arm 1, as long as the tuning structure 3 can tune the first radiation arm 1 and the signals radiated by the first radiation arm 1 can meet the usage requirements of the antenna assembly. As an implementation manner of the present disclosure, such as Figure 3 and Figure 4As shown, the tuning structure 3 is connected to the first radiating arm 1 through a tuning circuit 4. In this way, there is no need to use multiple branches to connect the tuning structure 3 and the first radiating arm 1. The connection between the tuning structure 3 and the first radiating arm 1 is relatively simple, convenient for debugging, with high reliability, and is conducive to simplifying the structure of the antenna assembly.

[0064] For the embodiment in which the tuning structure 3 includes a first inductor 31, a second inductor 32, a third inductor 33, and a capacitor 34, it can be understood that the first inductor 31, the second inductor 32, the third inductor 33, and the capacitor 34 are all connected to the first radiating arm 1 through the tuning circuit 4.

[0065] For the embodiment in which the tuning structure 3 includes a first inductor 31, a second inductor 32, a third inductor 33, and a capacitor 34, in order to further simplify the structure of the antenna assembly. Optionally, as Figure 3 and Figure 4 shown, the first inductor 31, the second inductor 32, the third inductor 33, and the capacitor 34 are all grounded through a grounding circuit 5. The first inductor 31, the second inductor 32, the third inductor 33, and the capacitor 34 do not need to be grounded through multiple lower branches. The connection between the first inductor 31, the second inductor 32, the third inductor 33, and the capacitor 34 and the grounding point is relatively simple, convenient for debugging, with high reliability, and is conducive to simplifying the structure of the antenna assembly.

[0066] As mentioned above, the present disclosure does not limit the operating frequency band of the second radiating arm 2, as long as the second radiating arm 2 can cooperate with the first radiating arm 1, and the frequency bands of the signals radiated by the second radiating arm 2 and the first radiating arm 1 can meet the usage requirements of the antenna assembly. As an embodiment of the present disclosure, the second frequency band is the MHB frequency band. Since the operating frequency band of the first radiating arm 1 can at least cover the LB frequency band, and the operating frequency band of the second radiating arm 2 can at least cover the MHB frequency band (i.e., the medium and high frequency band, with a frequency band range of 1.7 - 2.7 GHz), the antenna assembly can cover the common frequency bands of electronic devices, and the antenna assembly has good radiation efficiency and communication effect.

[0067] The present disclosure does not limit the specific structure of the first radiating arm 1, as long as the operating frequency band of the first radiating arm 1 can cover the first frequency band, and the radiation efficiency of the signal radiated by the first radiating arm 1 in the first frequency band is relatively good. As an embodiment of the present disclosure, as Figure 3 and Figure 4 shown, the first radiating arm 1 includes a first radiating section 11 and a second radiating section 12. There is a first gap 13 between the first radiating section 11 and the second radiating section 12. The first radiating section 11 is connected to a first feeding point 14, the second radiating section 12 is connected to a first grounding point 15, and the second radiating section 12 and the first radiating section 11 are coupled and fed through the first gap 13.

[0068] To improve the radiation frequency band and radiation efficiency of the second radiation arm 2, optionally, as Figure 3 and Figure 4 shown, the antenna assembly further includes a parasitic structure 6. The parasitic structure 6 is configured to be disposed between the first radiation arm 1 and the second radiation arm 2. Wherein, the parasitic structure 6 includes a parasitic radiator 61 located between the first radiation arm 1 and the second radiation arm 2. There is a second gap 63 between the parasitic radiator 61 and the second radiation arm 2. The parasitic radiator 61 is coupled and fed with the second radiation arm 2 through the second gap 63. There is a third gap 64 between the parasitic radiator 61 and the first radiation arm 1.

[0069] Referring to Figure 2 and Figure 5 shown, compared with the embodiment without the parasitic structure 6, when the abscissa (i.e., radiation frequency) is the same, the radiation efficiency of the second radiation arm 2 provided with the parasitic structure 6 is higher. At the same time, when the ordinate (i.e., radiation efficiency) is the same, the radiation bandwidth that the second radiation arm 2 provided with the parasitic structure 6 can radiate is wider. In other words, since there is a parasitic radiator 61 between the first radiation arm 1 and the second radiation arm 2, and the parasitic radiator 61 is coupled and fed with the second radiation arm 2 through the second gap 63, by reasonably setting the parasitic radiator 61, the bandwidth and radiation efficiency of the second radiation arm 2 can be improved.

[0070] It should be noted that in Figure 2 , the abscissa represents frequency, the unit is GHz, and the ordinate represents the radiation efficiency of the combined antenna (System Rad.Efficiency[Combo]) or the total efficiency of the corresponding antenna in decibels (dB), such as Figure 2 shown as the total efficiency (System Radiation.Efficiency in dB[Magnitude]) of the second radiation arm 2. In addition, 5, 8, and 12.5 in usb0mm, usb5mm, usbfloat, usb8mm, and usb12.5mm represent the lengths of the corresponding parasitic structure 6, and 0mm means no parasitic structure 6 is set.

[0071] The applicant found that within a certain range, increasing the length of the parasitic structure 6 is beneficial to improving the bandwidth and radiation efficiency of the second radiation arm 2. As Figure 2 and Figure 5 shown, when the second radiation arm 2 radiates signals of the same frequency, when the length of the parasitic radiator 61 is 8mm, the radiation efficiency of the second radiation arm 2 is greater than that when the length of the parasitic radiator 61 is 5mm. And when the second radiation arm 2 radiates signals of the same radiation efficiency, the radiation bandwidth of the second radiation arm 2 is wider than that when the length of the parasitic radiator 61 is 5mm.

[0072] The applicant also found that although increasing the length of the parasitic structure 6 is beneficial to improving the bandwidth and radiation efficiency of the second radiation arm 2, if the parasitic structure 6 is too long, the bandwidth and radiation efficiency of the second radiation arm 2 will decrease. As Figure 2 and Figure 5 shown, when the second radiation arm 2 radiates a signal of the same frequency and the length of the parasitic radiator 61 is 12.5 mm, the radiation efficiency of the second radiation arm 2 is less than that when the length of the parasitic radiator 61 is 8 mm. And when the second radiation arm 2 radiates a signal with the same radiation efficiency, the bandwidth of the second radiation arm 2 is less than that when the length of the parasitic radiator 61 is 8 mm.

[0073] The present disclosure does not limit the size of the parasitic structure 6, as long as the parasitic structure 6 can improve the bandwidth and radiation efficiency of the second radiation arm 2. To avoid the situation where the parasitic structure 6 is too long and instead reduces the bandwidth and radiation efficiency of the second radiation arm 2, the second radiation arm 2 is connected to the second feeding point 21 and the second grounding point 22. Along the direction from the first radiation arm 1 to the second radiation arm 2, the length of the parasitic radiator 61 is less than the length of the second radiation arm 2. Since the length of the parasitic radiator 61 is less than that of the second radiation arm 2, the parasitic radiator 61 itself will not interfere with the second radiation arm 2, effectively avoiding the situation where the size of the parasitic radiator 61 is large and the parasitic radiator 61 itself interferes with the second radiator, resulting in a decrease in the bandwidth and radiation efficiency of the second radiation arm 2.

[0074] The present disclosure does not limit the structure of the parasitic radiator 61, as long as the parasitic radiator 61 can improve the bandwidth and radiation efficiency of the second radiation arm 2. As an implementation manner of the present disclosure, as Figure 3 and Figure 4 shown, the parasitic structure 6 further includes a parasitic body 62. The parasitic radiator 61 is formed on the parasitic body 62. The parasitic radiator 61 is located on the side of the parasitic body 62 close to the second radiation arm 2. The parasitic radiator 61 is coupled and fed to the second radiation arm 2 through a third gap 64. One end of the parasitic body 62 is connected to the parasitic radiator 61, and the other end of the parasitic body 62 is grounded.

[0075] As another implementation manner of the present disclosure, the above-mentioned parasitic structure 6 may not include the parasitic body 62. The parasitic radiator 61 is directly disposed between the first radiation arm 1 and the second radiation arm 2, and the parasitic radiator 61 is coupled and fed to the second radiation arm 2 through a third gap 64.

[0076] When the antenna assembly of the present disclosure is applied to an electronic device, the specific installation position of the antenna assembly on the electronic device is not limited, as long as the antenna assembly can be installed on the electronic device and can meet the usage requirements of the electronic device. As an implementation manner of the present disclosure, the above-mentioned first radiation arm 1, second radiation arm 2 and parasitic structure 6 are all adapted to be arranged on one side of the electronic device close to the USB module 10.

[0077] According to a second aspect of the present disclosure, there is provided an electronic device including the antenna assembly as described above.

[0078] This electronic device has all the beneficial effects of the above-mentioned antenna assembly, which will not be elaborated here.

[0079] Optionally, the electronic device includes a middle frame and a USB module 10. The first radiation arm 1 and the second radiation arm 2 are part of the middle frame, and the USB module 10 is arranged between the first radiation arm 1 and the second radiation arm 2.

[0080] In order to improve the radiation frequency band and radiation efficiency of the electronic device, optionally, the electronic device further includes a parasitic structure 6. The parasitic structure 6 is arranged between the first radiation arm 1 and the second radiation arm 2, and the parasitic structure 6 is arranged in a stacked manner with the USB module 10. Since the parasitic structure 6 is arranged in a stacked manner with the USB module 10, that is, the USB module 10 is arranged in a suspended manner, the parasitic structure 6 does not occupy the installation space of the USB module 10, and there is no mechanical interference between the parasitic structure 6 and the USB module 10, effectively avoiding the situation where the USB module 10 cannot be installed in the electronic device due to the arrangement of the parasitic structure 6.

[0081] In addition, since the USB module 10 and the parasitic structure 6 are arranged in a stacked manner, it is beneficial to select a larger parasitic structure 6 under the condition of meeting the installation space limitation in the electronic device, thereby further improving the overall radiation frequency band and radiation efficiency of the electronic device and reducing the production and manufacturing costs.

[0082] In the above-mentioned electronic device, the antenna assembly has good integration and low structural complexity, and can be flexibly arranged inside the electronic device, thus having wide applicability. The above-mentioned electronic device can be a mobile phone, a tablet computer or an electronic wearable device, etc. The present disclosure does not limit the type of the electronic device.

[0083] The preferred embodiments of the present disclosure have been described in detail above with reference to the accompanying drawings. However, the present disclosure is not limited to the specific details in the above embodiments. Within the scope of the technical concept of the present disclosure, various simple modifications can be made to the technical solutions of the present disclosure, and these simple modifications all belong to the protection scope of the present disclosure.

[0084] In addition, it should be noted that, among the various specific technical features described in the above specific embodiments, without contradiction, they can be combined in any suitable manner. To avoid unnecessary repetition, the present disclosure will not separately describe various possible combination manners.

[0085] In addition, any combination can be made among various different embodiments of the present disclosure, as long as it does not violate the idea of the present disclosure, and it should also be regarded as the content disclosed by the present disclosure.

Claims

1. An antenna assembly, characterized in that, the antenna assembly includes a first radiation arm and a second radiation arm which are arranged at intervals, the operating frequency band of the first radiation arm covers at least a first frequency band, and the operating frequency band of the second radiation arm covers at least a second frequency band; the overlapping part of the frequency band radiated by the first radiation arm in the harmonic mode and the second frequency band is a third frequency band; the radiation efficiency of the first radiation arm when radiating the third frequency band is less than the radiation efficiency of the second radiation arm when radiating the third frequency band.

2. The antenna assembly according to claim 1, characterized in that, the antenna assembly further includes a tuning structure; the tuning structure is connected to the first radiation arm, and the tuning structure is used to adjust the radiation frequency band of the first radiation arm, and is used to make the radiation efficiency of the first radiation arm less than the radiation efficiency of the second radiation arm when both the first radiation arm and the second radiation arm radiate the third frequency band.

3. The antenna assembly according to claim 2, characterized in that, the tuning structure has at least one capacitor and at least one inductor; the capacitor and the inductor are arranged in parallel, one end of the capacitor and one end of the inductor are both connected to the first radiation arm, and the other end of the capacitor and the other end of the inductor are both grounded.

4. The antenna assembly according to claim 3, characterized in that, the at least one inductor includes a first inductor, a second inductor and a third inductor, and the inductance values of the first inductor, the second inductor and the third inductor are different; the first inductor, the second inductor, the third inductor and the capacitor are arranged in parallel.

5. The antenna assembly according to claim 4, characterized in that, the first inductor, the second inductor and the third inductor are used to tune the first radiation arm so that the operating frequency band of the first radiation arm can cover the LB frequency band.

6. The antenna assembly according to claim 4, characterized in that, the capacitor is used to tune the first radiation arm so that the first radiation arm can have the harmonic mode.

7. The antenna assembly according to claim 4, characterized in that, the first inductor, the second inductor, the third inductor and the capacitor are all connected to the first radiation arm through a tuning circuit; and / or, the first inductor, the second inductor, the third inductor and the capacitor are all grounded through a grounding circuit.

8. The antenna assembly according to claim 1, characterized in that, the second frequency band is the MHB frequency band.

9. The antenna assembly according to claim 1, characterized in that, the first radiation arm includes a first radiation section and a second radiation section; there is a first gap between the first radiation section and the second radiation section, the first radiation section is connected to a first feeding point, the second radiation section is connected to a first grounding point, and the second radiation section and the first radiation section are coupled and fed through the first gap.

10. The antenna assembly according to any one of claims 1-9, characterized in that, the antenna assembly further includes a parasitic structure, and the parasitic structure is used to be arranged between the first radiation arm and the second radiation arm; The parasitic structure includes a parasitic radiator located between the first radiation arm and the second radiation arm. There is a second gap between the parasitic radiator and the second radiation arm, and the parasitic radiator is coupled and fed through the second gap with the second radiation arm. There is a third gap between the parasitic radiator and the first radiation arm.

11. The antenna assembly according to claim 10, wherein, the second radiation arm is connected to a second feeding point and a second grounding point; Along the direction from the first radiation arm to the second radiation arm, the length of the parasitic radiator is less than the length of the second radiation arm.

12. The antenna assembly according to claim 10, wherein, the parasitic structure further includes a parasitic body, the parasitic radiator is formed on the parasitic body, the parasitic radiator is located on a side of the parasitic body close to the second radiation arm, and the parasitic radiator is coupled and fed through the third gap with the second radiation arm; One end of the parasitic body is connected to the parasitic radiator, and the other end of the parasitic body is grounded.

13. The antenna assembly according to claim 10, wherein, the parasitic radiator is coupled and fed through the third gap with the second radiation arm.

14. The antenna assembly according to claim 10, wherein, the first radiation arm, the second radiation arm and the parasitic structure are all adapted to be arranged on a side of the electronic device close to the USB module.

15. An electronic device, wherein, it includes the antenna assembly according to any one of claims 1-14.

16. The electronic device according to claim 15, wherein, the electronic device includes a middle frame and a USB module; the first radiation arm and the second radiation arm are part of the middle frame, and the USB module is arranged between the first radiation arm and the second radiation arm.

17. The electronic device according to claim 16, wherein, the electronic device further includes a parasitic structure, the parasitic structure is arranged between the first radiation arm and the second radiation arm, and the parasitic structure and the USB module are arranged in a stacked manner.

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