Antenna assembly and terminal device

Abstract

The application relates to an antenna assembly and a terminal device. The antenna assembly comprises a metal frame, the metal frame comprising a first radiator, a second radiator and a third radiator, the first radiator and the second radiator having a first gap therebetween; the third radiator has a second gap, the first radiator and the third radiator are connected to a first ground point, and the second radiator is connected to a second ground point; the first radiator is connected to a first feed source via a first filter circuit, and the first radiator is also connected to a third ground point via a second filter circuit; the second radiator is connected to a second feed source via a third filter circuit, the third radiator is also connected to a third feed source, and the second radiator is also connected to a fourth feed source via a fourth filter circuit, wherein by controlling the first to the fourth feed sources, the first radiator can work in a first frequency band, the second radiator can work in a second frequency band, a third frequency band, a fourth frequency band, and the third radiator can work in a fifth frequency band or a sixth frequency band.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of antennas, and in particular to an antenna assembly and a terminal device. BACKGROUND

[0002] With the continuous development and evolution of communication technology, the functions of portable mobile terminal devices are becoming increasingly rich, the terminal devices cover more and more frequency bands, and at the same time, users have higher and higher requirements for the online speed of the terminal devices. Therefore, MIMO and other antenna technologies are widely used in terminal antenna design. However, with the increase in the number of antennas, the space left for the antenna assembly in the terminal device is becoming smaller, and the utilization rate of the metal frame of the terminal device is particularly important. How to increase the frequency bands supported by the antenna assembly in the limited space has become a technical problem that needs to be solved in antenna design. In some existing technologies, different frequency bands are radiated by independent metal frame radiators to reduce the influence between each frequency band and the antennas. However, this may greatly increase the number of metal frame gaps and reduce the structural strength of the metal frame, thereby reducing the space utilization rate of the metal frame. SUMMARY

[0003] The embodiments of the present application disclose an antenna assembly and a terminal device.

[0004] In a first aspect, the embodiments of the present application disclose an antenna assembly, which comprises a metal frame, the metal frame comprising a first radiator, a second radiator and a third radiator, the first radiator being connected between the second radiator and the third radiator, and the first radiator and the second radiator having a first gap therebetween; the third radiator has a second gap; the first radiator and the third radiator are both connected to a first ground point, and the second radiator is connected to a second ground point; the first radiator is connected to a first feed source via a first filter circuit, and the first radiator is also connected to a third ground point via a second filter circuit; the second radiator is connected to a second feed source via a third filter circuit, the third radiator is also connected to a third feed source, and the second radiator is also connected to a fourth feed source via a fourth filter circuit; wherein the first feed source is configured to transmit a first frequency band signal to the first radiator via the first filter circuit, and the first radiator operates in the first frequency band; the second feed source is configured to generate a second frequency band signal or a third frequency band signal, and transmit the second frequency band signal or the third frequency band signal to the second radiator via the third filter circuit, so that the second radiator operates in the second frequency band or the third frequency band; the fourth feed source is configured to generate a fourth frequency band signal to the second radiator via the fourth filter circuit, so that the second radiator operates in the fourth frequency band; and the third feed source is configured to generate a fifth frequency band signal or a sixth frequency band signal, so that the third radiator operates in the fifth frequency band or the sixth frequency band.

[0005] In a second aspect, the embodiments of the present application disclose a terminal device, which comprises the antenna assembly of the first aspect.

[0006] Compared with the prior art, the present application has the following beneficial effects:

[0007] In the antenna assembly and the terminal device, the first to sixth radio frequency signals of different frequency bands are radiated by the shared metal frame radiator and the slot, without increasing the number of the metal frame radiators, the use of the metal frame and the structural strength are improved, and the integration of the terminal device is also improved. BRIEF DESCRIPTION OF DRAWINGS

[0008] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed in the embodiments will be briefly introduced as follows. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor.

[0009] Figure 1 is a structural schematic diagram of the antenna assembly of the embodiments of the present application;

[0010] Figure 2 is a first filter circuit schematic diagram of the antenna assembly of the embodiments of the present application;

[0011] Figure 3 is a second filter circuit schematic diagram of the antenna assembly of the embodiments of the present application;

[0012] Figure 4 is a third filter circuit schematic diagram of the antenna assembly of the embodiments of the present application;

[0013] Figure 5 is a fourth filter circuit schematic diagram of the antenna assembly of the embodiments of the present application;

[0014] Figure 6 is an S parameter curve diagram of the antenna assembly of the embodiments of the present application;

[0015] Figure 7 is an efficiency curve diagram of the antenna assembly of the embodiments of the present application;

[0016] Figure 8 is a current distribution situation schematic diagram of the first radiator of the antenna assembly of the embodiments of the present application;

[0017] Figure 9 is a current distribution situation of the second radiator of the second feed and the fourth feed of the antenna assembly of the embodiments of the present application and the first radiator;

[0018] Figure 10 is a current distribution of a third feeding source working frequency band of the antenna assembly of the embodiment of the present application at the third radiating body;

[0019] Figure 11 is a 3D simulation radiation pattern of WiFi2.4G MIMO1 and MIMO2 of the antenna assembly of the embodiment of the present application;

[0020] Figure 12 is a 2D simulation radiation pattern of two MIMO antennas of the antenna assembly of the embodiment of the present application at Phi=0° and Phi=90° two azimuth angles;

[0021] Figure 13 is a 3D simulation radiation pattern of WiFi5G MIMO1 and MIMO2 of the antenna assembly of the embodiment of the present application;

[0022] Figure 14 is a 2D simulation radiation pattern of two MIMO antennas of the antenna assembly of the embodiment of the present application at Phi=0° and Phi=90° two azimuth angles;

[0023] Figure 15 is a structural schematic diagram of the terminal device disclosed by the embodiment of the present application. DETAILED DESCRIPTION

[0024] The technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, but not all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative work are within the scope of protection of the present application.

[0025] In the present application, the terms "upper", "lower", "inner", "outer", "middle" and the like indicate the orientation or positional relationship shown in the drawings. These terms are mainly used to better describe the present application and its embodiments, and are not used to limit the indicated devices, elements or components to have a specific orientation, or to be constructed and operated in a specific orientation.

[0026] In addition, in addition to indicating the orientation or positional relationship, some of the above terms can also be used to indicate other meanings, for example, the term "upper" can also be used to indicate a certain attachment relationship or connection relationship in some cases. Those of ordinary skill in the art can understand the specific meaning of these terms in the present application according to the specific circumstances.

[0027] In addition, the terms "mounting", "arrangement", "provided with", "connected" should be understood broadly. For example, it can be fixed connection, detachable connection, or integral structure; it can be mechanical connection, or electrical connection; it can be direct connection, or indirect connection through intermediate medium, or internal communication between two devices, elements or components. The specific meaning of the above terms in the present application can be understood according to the specific circumstances by those skilled in the art.

[0028] In addition, the terms "first", "second" and the like are mainly used to distinguish different devices, elements or components (the specific types and structures may be the same or different), and are not intended to indicate or imply the relative importance and quantity of the indicated devices, elements or components. Unless otherwise stated, the meaning of "multiple" is two or more.

[0029] The embodiments of the present application disclose an antenna assembly 100, which is used for a terminal device 1000. The terminal device 1000 can be a smartphone, a tablet computer, a game device, a notebook computer or a device with wireless communication function.

[0030] Taking a mobile phone as an example, in a conventional 5G mobile phone antenna design scheme, in order to meet the coverage of multiple frequency bands, such as GPS L1, GPS L5, WIFI 2.4G, WIFI 5G, NR-N78 and the like, multiple antennas are usually required. With the increase of the number of antennas, the space left for the antenna assembly in the mobile phone is getting smaller and smaller, and the utilization rate of the metal frame of the mobile phone is particularly important.

[0031] Among them, the GPS L1 frequency band is one of the most commonly used frequency bands in the global satellite navigation system, and the center frequency of the L1 frequency band is 1575.42 MHz, which has high signal strength and good penetration ability. The navigation signal of the L1 frequency band is suitable for a wide range of applications, including aviation, navigation, vehicle navigation and consumer electronics such as smartphones.

[0032] The GPS L5 frequency band is one of the latest frequency bands in the global satellite navigation system, with a center frequency of 1176.45 MHz. The introduction of the L5 frequency band is mainly to provide higher positioning accuracy and anti-interference performance. The signal of the L5 frequency band has a higher bandwidth and lower multipath effect, which can provide more accurate and reliable positioning information. The application of the L5 frequency band is mainly concentrated in the field of high-precision positioning, such as aerospace, geological exploration and precision agriculture, etc. Due to the introduction of the L5 frequency band, the performance of the global satellite navigation system has been significantly improved, providing users with better positioning and navigation experience. This frequency band is also widely used in electronic devices such as mobile phones to improve their positioning and navigation capabilities.

[0033] NR-N78 generally refers to N78 in the 5G NR (New Radio) frequency band, which belongs to a medium frequency band, and the frequency range is about 3.3GHz to 4.2GHz. The characteristic of this frequency band is that it can provide higher data transmission rate and provide larger bandwidth, thereby supporting high-speed data transmission and high-capacity network service. The NR-N78 frequency band is suitable for use in urban environments and can support dense network deployment and high user density.

[0034] To ensure the structural strength of the metal frame of the mobile phone, reduce the gap of the metal frame, and at the same time improve the space utilization rate of the metal frame. Please refer to Figure 1 , Figure 1 is a structural schematic diagram of the antenna assembly 100 of the embodiment of the present application. The antenna assembly 100 provided by the embodiment of the present application comprises a metal frame 10, the metal frame 10 comprises a first radiator 11, a second radiator 12 and a third radiator 13, the first radiator 11 is connected between the second radiator 12 and the third radiator 13, and the first radiator 11 and the second radiator 12 have a first gap 14; the third radiator 13 has a second gap 15; the first radiator 11 and the third radiator 13 are both connected to a first ground point 21, and the second radiator 12 is connected to a second ground point 22; the first radiator 11 is connected to a first feed source 41 via a first filter circuit 31, and the first radiator 11 is also connected to a third ground point 23 via a second filter circuit 32; the second radiator 12 is connected to a second feed source 42 via a third filter circuit 33, and the third radiator 13 is also connected to a third feed source 43, and the second radiator 12 is also connected to a fourth feed source 44 via a fourth filter circuit 34; wherein the first feed source 41 is used to transmit a first frequency band signal to the first radiator 11 via the first filter circuit 31, and then the first radiator 11 works in the first frequency band; the second feed source 42 is used to generate a second frequency band signal or a third frequency band signal, and transmit the signal to the second radiator 12 via the third filter circuit 33, so that the second radiator 12 works in the second frequency band or the third frequency band; the fourth feed source 44 is used to generate a fourth frequency band signal to the second radiator 12 via the fourth filter circuit 34, so that the second radiator 12 works in the fourth frequency band; and the third feed source 43 is used to generate a fifth frequency band signal or a sixth frequency band signal, so that the third radiator 13 works in the fifth frequency band or the sixth frequency band.

[0035] Specifically, the first radiator 11 is L-shaped; and the second radiator 12 and the third radiator 13 are both straight strip-shaped.

[0036] The first frequency band, the second frequency band, the third frequency band, and the fourth frequency band are all different; and the second frequency band and the fourth frequency band are at least partially the same as the fifth frequency band and the sixth frequency band. Specifically, in the embodiment, the first frequency band includes a GPS L1 frequency band and a GPS L5 frequency band; the second frequency band is the same as the fifth frequency band, and both are a WIFI 2.4G frequency band; the fourth frequency band is the same as the sixth frequency band, and both are a WIFI 5G frequency band; and the third frequency band is an N78 radio frequency band. The second radiator 12 and the third radiator 13 are both MIMO antennas; and the second radiator 12 and the third radiator 13 are arranged orthogonally.

[0037] Specifically, the first feed source 41 generates radio frequency signals of GPS L1 and GPS L5, and transmits the GPS signals to the first radiator 11 through the first filter circuit 31 to generate resonance, so that the first radiator 11 mainly covers the GPS L1 frequency band and the GPS L5 frequency band.

[0038] Referring to Figure 2 , Figure 2 is a schematic diagram of the first filter circuit 31 in the antenna assembly 100. The first filter circuit 31 is an L-shaped LC low-pass high-resistance filter circuit, including a first inductor L1 and a first capacitor C1. The two ends of the first inductor L1 are connected to the first radiator 11 and the first feed source 41 respectively. The node between the first inductor L1 and the first feed source 41 is grounded through the first capacitor C1. When the first radiator 11 works in the first frequency band, the first filter circuit 31 is a passband; and when the first radiator 11 works in the second frequency band or the third frequency band and the second radiator 12 works in the fourth frequency band, the first filter circuit 31 is a stopband. Specifically, the first filter circuit 31 is a passband in the working frequency bands GPS L1 and GPS L5, and is a stopband in the working frequency band WiFi 2.4G, the working frequency band WiFi 5G, and the SUB6G N78 frequency band.

[0039] In the embodiment, the first radiator 11 is opposite to the second radiator 12, the second radiator 12 is the main radiator of the radio frequency signals of the second feed source 42 and the fourth feed source 44, and the first radiator 11 is partially the auxiliary radiator of the radio frequency signals of the second feed source 42 and the fourth feed source 44. The current on the metal frame 10 returns to the ground through the second return point 22. The second feed source 42 mainly generates WiFi 2.4G MIMO_1 and N78 radio frequency signals, the fourth feed source 44 mainly generates WiFi 5G MIMO_1 signals, and the second radiator 12 is the common main radiator of the second feed source 42 and the fourth feed source 44, and covers the WiFi 2.4G MIMO_1, WiFi 5G MIMO_1 and N78 working frequency bands. In this way, the coverage of multiple working frequency bands is realized without increasing the number of radiators of the metal frame 10, the occupancy rate of the antenna metal frame 10 is saved, and the integration of the terminal device 1000 is improved.

[0040] Please refer to Figure 1 and Figure 3 In the embodiment, the first gap 14 exists between the first radiator 11 and the second radiator 12, the second filter circuit 32 exists near the first gap 14 of the first radiator 11, the second filter circuit 32 is an LC band-pass filter circuit and includes a second inductor L2 and a second capacitor C2, the first radiator 11 is grounded in sequence through the second inductor L2 and the second capacitor C2, and when the second radiator 12 works in the fourth frequency band, the second filter circuit 32 is equivalent to a large capacitor shorted to the ground, so as to provide a ground return path for the fourth frequency band signal; when the first radiator 11 works in the first frequency band, the second filter circuit 32 is equivalent to a small capacitor connected in parallel to the ground, so as to adjust the equivalent length of the first frequency band in the first radiator 11.

[0041] Specifically, the second filter circuit 32 is composed of a band-pass filter in which the second inductor L2 and the second capacitor C2 are connected in series to the ground. The LC band-pass filter is equivalent to a large capacitor shorted to the ground in the WiFi 5G MIMO_1 working frequency band, so as to provide a ground return path for the WiFi 5G MIMO_1 signal of the fourth feed source 44; and is equivalent to a small capacitor connected in parallel to the ground in the GPS L1 / L5 frequency band, so as to adjust the equivalent length of the GPS L1 / L5 in the first radiator 11.

[0042] Please refer to Figure 4 , Figure 4is a schematic diagram of a third filter circuit 33 in the antenna assembly 100 of the embodiment of the present application. The third filter circuit 33 is an L-shaped LC low-pass high-resistance filter circuit, comprising a third inductor L3 and a third capacitor C3. The third inductor L3 is connected between the second radiator 12 and the second feed source 42. A node between the third inductor L3 and the second feed source 42 is grounded via the third capacitor C3. When the second radiator 12 operates in the second frequency band or the third frequency band, the third filter circuit 33 is a passband. When the second radiator 12 operates in the fourth frequency band, the third filter circuit 33 is a stopband.

[0043] Referring to Figure 5 , Figure 5 is a schematic diagram of a fourth filter circuit 34 in the antenna assembly 100 of the embodiment of the present application. The fourth filter circuit 34 comprises a parallel LC band-stop filter and a π-shaped LC high-pass low-resistance circuit. The parallel LC band-stop filter and the π-shaped LC high-pass low-resistance circuit are connected in sequence between the second radiator 12 and the fourth feed source 44. The parallel LC band-stop filter comprises a fourth inductor L4 and a fourth capacitor C4 arranged in parallel. The π-shaped LC high-pass low-resistance circuit comprises a fifth capacitor C5 connected between the parallel LC band-stop filter and the fourth feed source 44, and a fifth inductor L5 connected between a node between the fourth capacitor C4 and the fourth feed source 44 and the ground. When the second radiator 12 operates in the third frequency band, the parallel LC band-stop filter is a stopband. When the second radiator 12 is at a frequency point, the parallel LC band-stop filter is high impedance and equivalent to an open circuit.

[0044] Specifically, the third filter circuit 33 is an L-shaped LC low-pass high-resistance circuit, which is a passband in the WiFi 2.4G frequency band and the N78 frequency band, and is a stopband in the WiFi 5G frequency band, thereby reducing the influence of the second feed source 42 and the fourth feed source 44 on radio frequency signals. The fourth filter circuit 34 is composed of a parallel LC band-stop filter and a π-shaped LC high-pass low-resistance circuit. The parallel LC is a stopband in the N78 frequency band and is high impedance and equivalent to an open circuit at a frequency point 3.5GHz. The L-shaped matching in the rear stage is a small capacitor C in series and a small inductor L in parallel.

[0045] Referring to Figure 1In the embodiment, the second gap 15 divides the third radiator 13 into a first part 131 connected to the first radiator 11 and a second part 132 away from the first radiator 11, the third feed source 43 is connected to the first part 131, and the second part 132 is grounded. The first ground point 21 is a common current return ground path of the third radiator 13 and the first radiator 11. The third feed source 43 generates a radio frequency signal of WiFi 2.4G / 5G MIMO_2 of the antenna assembly 100, and radiates energy through the third radiator 13 and the second gap 15. The third radiator 13 and the second radiator 12 are radiators of WiFi 2.4G / 5G MIMO_2 and WiFi 2.4G / 5G MIMO_1 respectively, the first radiator 11 is located between the third radiator 13 and the second radiator 12, and the second radiator 12 and the third radiator 13 are orthogonal in spatial position layout, which is beneficial to reduce the influence of WiFi 2.4G / 5G MIMO_1 and WiFi 2.4G / 5G MIMO_2 two MIMO antennas. In addition, the WiFi 2.4G / 5G MIMO antennas are orthogonal in spatial position layout, which is also beneficial to a certain extent to realize the pattern complementarity of WiFi radiation signals, reduce the blind spot of WiFi signals, and improve the user experience.

[0046] Please refer to Figure 6 , Figure 6 is an S parameter curve of the antenna assembly 100 of the embodiment. As shown in curve S1, the first feed source 41 resonates at GPS L1 and GPS L5 frequency bands through the first radiator 11, realizing dual-frequency GPS operation; curves S2 and S4 are WiFi 2.4G / 5G MIMO_1 and N78 frequency band resonances generated by the second feed source 42 and the fourth feed source 44 through the second radiator 12 and the second filter circuit 32 of the first radiator 11; curve S3 is a WiFi 2.4G / 5G frequency band resonance generated by the third feed source 43 through the third radiator 13, realizing WiFi 2.4G / 5G MIMO_2 antenna operation.

[0047] Please refer to Figure 7 , Figure 7is the efficiency curve diagram of the antenna assembly 100 of the embodiment of the present application. As shown in curve E1, the system efficiency of the working frequency band GPS L5 is -5.8 dB, and the system efficiency of the working frequency band GPS L1 is -3.8 dB. In addition, the simulation of the GPS L1 upper hemisphere ratio is -2.6 dB, and the GPS L5 upper hemisphere ratio is -3.0 dB. The antenna has a good upper hemisphere ratio, which is beneficial to user positioning experience; as shown in curve E2, the system efficiency of the working frequency band WiFi 2.4G MIMO_1 is within -4.5 dB, and the peak efficiency of the system is -3.8 dB. The system efficiency of the working frequency band N78 is within -6 dB, and the peak efficiency of the system is -4.8 dB; curve E3 is the system efficiency of the working frequency band WiFi 2.4G MIMO_2, which is -3.0 dB, and the system efficiency of the working frequency band WiFi 5G MIMO_2 is within -6 dB; curve E4 is the system efficiency of the working frequency band WiFi 5G MIMO_1, which is within -6 dB, and the peak efficiency is -3.2 dB. As can be seen from the figure, the terminal antenna system has good system radiation efficiency in the covered frequency band, which meets the antenna performance requirements of the terminal device.

[0048] Please refer to Figure 8 , Figure 8 is a schematic diagram of the current distribution of the first radiator 11 of the antenna assembly 100 of the embodiment of the present application. The first radiator 11 resonates at the frequency points GPS L5 and GPS L1. At the frequency point 1.17 GHz, the first radiator 11 is in IFA antenna quarter-mode, the first return point 21 is a current large point, and the position close to the first gap 14 of the first radiator 11 is a current small point. At the frequency point 1.57 GHz, the first feed source 41 to the first gap 14 is in quarter-mode, the position of the first feed source 41 is a current large point, and the position close to the first gap 14 is a current small point. In addition, the first filter circuit 31 is equivalent to a small capacitance loading effect on the working frequency band, which can adjust the equivalent length of the GPS L5 / L1 radiator.

[0049] Please refer to Figure 9 , Figure 9is the current distribution of the second feed source 42 and the fourth feed source 44 of the antenna assembly 100 of the embodiment of the present application in the second frequency band of the second radiator 12 and the first radiator 11. In the frequency point 2.45 GHz, the IFA antenna of the second radiator 12 is in the quarter mode, the first return point 21 is the current large point, and the position close to the first slot 14 is the current small point. In the frequency point 3.5 GHz, the main mode is the position of the second feed source 42 and the parasitic three-quarter mode of the first radiator 11, the current large points are at the first return point 21 and the position of the second feed source 42, and the current zero point is at the position of the first radiator 11. In addition, the second filter circuit 32 is equivalent to a capacitor to ground in the working frequency band 3.5 GHz. In the frequency point 5.4 GHz, the second radiator 12 and the second filter circuit 32 generate the half mode of the fourth feed source 44 to the third return point 23, and the second filter circuit 32 is equivalent to a large capacitor in the frequency point 5.4 GHz. The third return point 23 is the ground return path for WiFi 5G.

[0050] Please refer to Figure 10 , Figure 10 is the current distribution of the third feed source 43 of the antenna assembly 100 of the embodiment of the present application in the working frequency band of the third radiator 13. In the frequency point 2.45 GHz, the IFA antenna of the third radiator 13 is in the quarter mode, the first return point 21 is the current large point, and the position close to the second slot 15 is the current small point. In the frequency point 5.4 GHz, the main mode is the quarter mode of the position of the third feed source 43 to the second slot 15, the current large point is at the position of the third feed source 43, and the current small point is close to the second slot 15.

[0051] The two MIMO antenna radiators of the antenna assembly 100 of the embodiment of the present application have orthogonality in the spatial position layout and complementarity in the far-field radiation pattern. Please refer to Figure 11 and Figure 12 , Figure 11 is the 3D simulation radiation pattern of the WiFi 2.4G MIMO1 and MIMO2 of the antenna assembly 100 of the embodiment of the present application, Figure 12 is the 2D simulation radiation pattern of the two MIMO antennas of the antenna assembly 100 of the embodiment of the present application in the azimuth angle Phi=0° and Phi=90°. From Figure 11 and Figure 12 the radiation pattern simulation results, it can be seen that the MIMO antenna assembly 100 has the characteristic of complementary pattern.

[0052] Please refer to Figure 13 and Figure 14 , Figure 13 is the 3D simulation radiation pattern of the WiFi 5G MIMO1 and MIMO2 of the antenna assembly 100 of the embodiment of the present application, Figure 14is the 2D simulation radiation pattern of two MIMO antennas of the antenna assembly 100 of the embodiment of the present application at Phi=0° and Phi=90° two azimuth angles. As can be seen from the simulation result, the terminal MIMO antenna assembly 100 also has the characteristic of complementary pattern at the working frequency band WiFi5G.

[0053] On the other hand, referring to Figure 15 The embodiment of the present application also discloses a terminal device 1000, which comprises the antenna assembly 100 described above.

[0054] Compared with the prior art, the beneficial effects of the present application are that:

[0055] In the antenna assembly 100 and the terminal device 1000 disclosed by the embodiment of the present application, the first to sixth different frequency bands of radio frequency signals are radiated by sharing the metal frame radiator and the slot, specifically, the antenna assembly 100 can comprise GPS L1 (1.575 GHz), GPS L5 (1.176 GHz) frequency band antennas, WiFi 2.4G (2.4GHz-2.5GHz) / 5G (5.1GHz-5.85GHz) MIMO antennas and SUB 6G (N78: 3.3GHz-3.8GHz) frequency band antennas, without increasing the number of metal frame 10 radiators, multiple working frequency bands are integrated, the utilization rate and structural strength of the metal frame 10 are improved, and at the same time, the integration of the terminal device 1000 is also improved. In addition, the present application proposes two WiFi 2.4G / 5G MIMO antennas orthogonal layout, which is conducive to realizing the pattern complementarity of WiFi 2.4G / 5G radiation signals, reducing the blind spot of WiFi signals, and improving the user experience in horizontal screen and vertical screen scenarios.

[0056] The antenna assembly and the terminal device disclosed by the embodiment of the present application are described in detail above, and the principles and implementation modes of the present application are described by applying specific examples in this paper; the above embodiment is only used to help understand the antenna assembly and the terminal device and the core idea thereof; at the same time, for those skilled in the art, according to the idea of the present application, the specific implementation mode and application range will be changed; in conclusion, the content of the specification should not be understood as a limitation of the present application.

Claims

1. An antenna assembly, characterized by The antenna assembly comprises a metal frame, the metal frame comprises a first radiator, a second radiator and a third radiator, the first radiator is connected between the second radiator and the third radiator, and a first gap is formed between the first radiator and the second radiator; the third radiator has a second gap; The first radiator and the third radiator are connected to a first ground point, and the second radiator is connected to a second ground point; the first radiator is connected to a first feed source via a first filter circuit, and the first radiator is also connected to a third ground point via a second filter circuit; the second radiator is connected to a second feed source via a third filter circuit, the third radiator is also connected to a third feed source, and the second radiator is also connected to a fourth feed source via a fourth filter circuit; The first feed source is used to transmit a first frequency band signal to the first radiator via the first filter circuit, so that the first radiator works in the first frequency band; the second feed source is used to generate a second frequency band signal or a third frequency band signal, which is transmitted to the second radiator via the third filter circuit, so that the second radiator works in the second frequency band or the third frequency band; the fourth feed source is used to generate a fourth frequency band signal to the second radiator via the fourth filter circuit, so that the second radiator works in the fourth frequency band; and the third feed source is used to generate a fifth frequency band signal or a sixth frequency band signal, so that the third radiator works in the fifth frequency band or the sixth frequency band.

2. The antenna assembly of claim 1, wherein, The first frequency band to the fourth frequency band are all different; the second frequency band and the fourth frequency band are at least partially the same as the fifth frequency band and the sixth frequency band; the second radiator and the third radiator are MIMO antennas; and the second radiator and the third radiator are arranged orthogonally.

3. The antenna assembly of claim 2, wherein, The first frequency band comprises a GPS L1 frequency band and a GPS L5 frequency band; the second frequency band and the fifth frequency band are WIFI 2.4G frequency bands, the fourth frequency band and the sixth frequency band are WIFI 5G frequency bands; and the third frequency band is an N78 radio frequency band.

4. The antenna assembly of claim 1, wherein, The first radiator is L-shaped; the second radiator and the third radiator are both straight strip-shaped.

5. The antenna assembly of claim 4, wherein, The second gap divides the third radiator into a first part connected to the first radiator and a second part away from the first radiator, the third feed source is connected to the first part, and the second part is grounded.

6. The antenna assembly of claim 1, wherein, The first filter circuit is an L-shaped LC low-pass high-resistance filter circuit, comprising a first inductor and a first capacitor, two ends of the first inductor are connected to the first radiator and the first feed source respectively, and a node between the first inductor and the first feed source is grounded via the first capacitor, When the first radiator works in the first frequency band, the first filter circuit is a passband; When the first radiator works in the second frequency band or the third frequency band and the second radiator works in the fourth frequency band, the first filter circuit is a stopband.

7. The antenna assembly of claim 1, wherein, The second filter circuit is an LC band-pass filter circuit, comprising a second inductor and a second capacitor, the first radiator is grounded via the second inductor and the second capacitor in sequence, and when the second radiator works in the fourth frequency band, the second filter circuit is equivalent to a large capacitor shorted to ground, so as to provide a ground return path for the fourth frequency band signal; when the first radiator works in the first frequency band, the second filter circuit is equivalent to a small capacitor in parallel to ground, so as to adjust the equivalent length of the first frequency band on the first radiator.

8. The antenna assembly of claim 1, wherein, The third filter circuit is an L-shaped LC low-pass high-resistance filter circuit, comprising a third inductor and a third capacitor, the third inductor is connected between the second radiator and the second feed source, and a node between the third inductor and the second feed source is grounded via the third capacitor, When the second radiator works in the second frequency band or the third frequency band, the third filter circuit is a passband; When the second radiator works in the fourth frequency band, the third filter circuit is a stopband.

9. The antenna assembly of claim 1, wherein, The fourth filter circuit comprises a parallel LC band-stop filter and a π-shaped LC high-pass low-resistance circuit, the parallel LC band-stop filter and the π-shaped LC high-pass low-resistance circuit are connected between the second radiator and the fourth feed source in sequence, the parallel LC band-stop filter comprises a fourth inductor and a fourth capacitor arranged in parallel, and the π-shaped LC high-pass low-resistance circuit comprises a fifth capacitor connected between the parallel LC band-stop filter and the fourth feed source, and a fifth inductor connected between a node between the fourth capacitor and the fourth feed source and ground; When the second radiator works in the third frequency band, the parallel LC band-stop filter is a stopband, and when the second radiator is at a frequency point, the parallel LC band-stop filter is high impedance and equivalent to an open circuit.

10. A terminal device, characterized by comprising: The terminal device comprises the antenna assembly as claimed in any one of claims 1-9.

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