Foldable screen devices

Abstract

This application discloses a foldable screen device, relating to the field of electronic product technology. The foldable screen device includes a first body, a second body, and a first switching tuning circuit. The first body and the second body are rotatably connected. The first body includes a first radiator, and the second body includes a second radiator. The first radiator includes a first feed point, and the second radiator includes a second feed point. The first radiator is a radiator for a first antenna, and the second radiator is a radiator for a second antenna. The first feed point is a feed point for the first antenna, and the second feed point is a feed point for the second antenna. The first feed point is grounded through the first switching tuning circuit. When the foldable screen device is in a folded state, the first radiator and the second radiator are opposite each other. When the first switching tuning circuit is in a first state, the first radiator forms an auxiliary parasitic unit for the second antenna.

Description

Technical Field

[0001] This application relates to the field of electronic product technology, specifically to a foldable screen device. Background Technology

[0002] Foldable screen mobile devices are attracting increasing attention due to their novel form factor. However, due to the limitations of the hinge area, only three sides of each foldable screen device can accommodate antennas. As the number of antennas increases and the pursuit of extreme thinness and lightness in foldable screens further compresses the space available for antenna placement within the main body, increasing the difficulty of antenna design. Traditional designs typically place antennas on the side of the main body where the environment is relatively better.

[0003] When folded, traditional antenna architectures for foldable mobile terminals can lead to a significant decrease in antenna performance, affecting signal reception and communication quality. This is mainly because the folded screen phone is affected by factors such as the sub-frame and indium tin oxide (ITO) in the screen, which cause significant absorption of antenna energy, resulting in a noticeable decrease in antenna performance. It is evident that foldable mobile terminals generally suffer from poor antenna performance when folded. Utility Model Content

[0004] This application provides a foldable screen device that can solve the problem of poor antenna performance in foldable screen mobile terminals when they are folded.

[0005] In a first aspect, a foldable screen device is provided, including a first body, a second body, and a first switching tuning circuit. The first body and the second body are rotatably connected. The first body includes a first radiator, and the second body includes a second radiator. The first radiator includes a first feed point, and the second radiator includes a second feed point. The first radiator is a radiator for a first antenna, and the second radiator is a radiator for a second antenna. The first feed point is a feed point for a first antenna, and the second feed point is a feed point for a second antenna. The first feed point is grounded through the first switching tuning circuit. When the foldable screen device is in a folded state, the first radiator and the second radiator are opposite each other.

[0006] When the first switching tuning circuit is in the first state, the first radiator forms an auxiliary parasitic element of the second antenna.

[0007] In this embodiment, by grounding the first feed point through the first switching tuning circuit, since the first radiator forms an auxiliary parasitic unit of the second antenna when the first switching tuning circuit is in the first state, the first switching tuning circuit can be controlled to be in the first state when the foldable screen device is in the folded state. At this time, the first radiator forms an auxiliary parasitic unit of the second antenna, so that the operating frequency band of the second antenna can reuse the aperture of the first radiator. In this way, the aperture efficiency of the second antenna can be improved while the influence of the first radiator on the second antenna can be reduced, thereby improving the performance of the antenna located in the body in the folded state. Attached Figure Description

[0008] Figure 1 This is one of the schematic diagrams of the antenna structure in the first fuselage and the second fuselage in the embodiments of this application;

[0009] Figure 2 This is a schematic diagram of the structure of the fourth switch tuning circuit in the embodiments of this application;

[0010] Figure 3 This is a schematic diagram of the third switch tuning circuit in the embodiments of this application;

[0011] Figure 4 This is a schematic diagram of the fifth switch tuning circuit in the embodiments of this application;

[0012] Figure 5(a) is a schematic diagram comparing the Smith impedance of the branch apertures in the first antenna when the fifth antenna is multiplexed and not multiplexed in 2.4G.

[0013] Figure 5(b) is a schematic diagram comparing the efficiency of the branch apertures in the first antenna when the fifth antenna is reused and not reused in 2.4G.

[0014] Figure 6 This is the second schematic diagram of the antenna structure in the first fuselage and the second fuselage in the embodiments of this application;

[0015] Figure 7 yes Figure 1 The embodiments and Figure 6 The diagram shows a comparison of GPS L1 efficiency curves when the fifth antenna's GPS L1 and the first antenna's B41 coexist in the embodiment shown. Detailed Implementation

[0016] The technical solutions of the embodiments of this application will be clearly described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this application. All other embodiments obtained by those skilled in the art based on the embodiments of this application are within the scope of protection of this application.

[0017] The terms "first," "second," etc., used in this application are used to distinguish similar objects and not to describe a specific order or sequence. It should be understood that such terms can be used interchangeably where appropriate so that embodiments of this application can be implemented in orders other than those illustrated or described herein, and the objects distinguished by "first" and "second" are generally of the same class, not limited in number; for example, the first object can be one or more. Furthermore, "or" in this application indicates at least one of the connected objects. For example, the scope of protection for "A or B" covers at least three scenarios: Scenario 1: including A but not B; Scenario 2: including B but not A; Scenario 3: including both A and B. In addition, the terms "A and / or B," "at least one of A and B," and "at least one of A or B" also cover at least the above three scenarios. The character " / " generally indicates that the preceding and following objects are in an "or" relationship.

[0018] The following description, in conjunction with the accompanying drawings, details a foldable screen device provided in this application through some embodiments and application scenarios.

[0019] Please see Figure 1 This application provides a foldable screen device, including a first body 100, a second body 200, and a first switching tuning circuit 300. The first body 100 and the second body 200 are rotatably connected. The first body 100 includes a first radiator 110, and the second body 200 includes a second radiator 210. The first radiator 110 includes a first feed point 111, and the second radiator 210 includes a second feed point 211. The first radiator 110 is a radiator of a first antenna 1100, and the second radiator 210 is a radiator of a second antenna 1200. The first feed point 111 is a feed point of the first antenna 1100, and the second feed point 211 is a feed point of the second antenna 1200. The first feed point 111 is grounded through the first switching tuning circuit 300. When the foldable screen device is in a folded state, the first radiator 110 and the second radiator 210 are opposite each other.

[0020] When the first switching tuning circuit 300 is in the first state, the operating mode of the first radiator 110 is matched with the operating frequency band of the second antenna 1200, so that the first radiator 110 forms an auxiliary parasitic unit of the second antenna 1200.

[0021] The aforementioned foldable screen device can be any type of foldable screen electronic device, such as a foldable screen phone or other types of foldable screen mobile terminal.

[0022] It is understood that the first body 100 and the second body 200 serve as the bodies for the two displays of the foldable screen device, with the first body 100 being the body for the main screen and the second body 200 being the body for the secondary screen. The first body 100 and the second body 200 can be connected via various types of hinge structures 1000 to achieve a rotatable connection between them.

[0023] It should be noted that the folding screen device also includes a flexible screen, which covers both the first body 100 and the second body 200. Thus, during the relative rotation of the first body 100 and the second body 200, the flexible screen can be folded, unfolded, or suspended.

[0024] It is understood that the first radiator 110 can be located at any one of the edges of the first fuselage 100, or at the junction of any two adjacent edges of the first fuselage 100. For example, please refer to... Figure 1 In some embodiments, the first radiator 110 is located on the top edge of the first fuselage 100, and correspondingly, the second radiator 210 is located on the top edge of the second fuselage 200. Furthermore, in other embodiments of this application, the first radiator 110 may also be located on the side edge or bottom edge of the first fuselage 100, and correspondingly, the second radiator 210 may also be located on the side edge or bottom edge of the second fuselage 200 at a position opposite to the first radiator 110.

[0025] The frame of the first body 100 and the frame of the second body 200 can be conductive frames, for example, frames made of metal.

[0026] Please see Figure 1 The first antenna 1100 further includes a first feed 1110, which is electrically connected to the first feed point 111. The second antenna 1200 further includes a second feed 1210, which is electrically connected to the second feed point 211.

[0027] The aforementioned first switching tuning circuit 300 may include two or more tuning sub-circuits controlled by a switching element. Different tuning sub-circuits can be switched based on the switch in the first switching tuning circuit 300 to achieve mode switching. The tuning sub-circuit may be various common tuning circuits; for example, it may be a circuit comprising at least one of capacitors and inductors. When a tuning sub-circuit includes two or more components, these components can be connected in series and parallel, and the specific configuration can be adjusted as needed.

[0028] The aforementioned first state can refer to the state in which the first switching tuning circuit 300 connects the first feed point 111 to ground through one of its included tuning sub-circuits. It is understood that the first switching tuning circuit 300 may include other states besides the first state, and when the first switching tuning circuit 300 is in other states, the first antenna 1100 can be tuned based on the first switching tuning circuit 300.

[0029] The matching of the operating mode of the first radiator 110 with the operating frequency band of the second antenna 1200 can mean that the first radiator 110 can generate a mode that radiates to the operating frequency band of the second antenna 1200, that is, it is an auxiliary parasitic element of the second antenna 1200, which can improve the aperture efficiency of the 1200 operating frequency band. For example, a 1 / 2 wavelength mode is excited in the first radiator 110 to help improve the aperture efficiency of the second antenna 1200, or a 1 / 4 wavelength mode is excited in the first radiator 110 to help improve the aperture efficiency of the second antenna 1200, etc.

[0030] The aforementioned first radiator 110 forming an auxiliary parasitic element of the second antenna 1200 can mean that during the operation of the second antenna 1200, the first radiator 110 generates a parasitic mode of the second antenna 1200.

[0031] In this embodiment, by grounding the first feed point 111 through the first switching tuning circuit 300, since the operating mode of the first radiator 110 matches the operating frequency band of the second antenna 1200 when the first switching tuning circuit 300 is in the first state, the first switching tuning circuit 300 can be controlled to be in the first state when the foldable screen device is in the folded state. At this time, the operating mode of the first radiator 110 in the fuselage opposite to the second antenna 1200 in the folded state can be tuned to match the operating frequency band of the second antenna 1200. The first radiator 110 forms an auxiliary parasitic unit of the second antenna 1200, so that the operating frequency band of the second antenna 1200 can reuse the aperture of the first radiator 110. In this way, the aperture efficiency of the second antenna 1200 can be improved while the influence of the first radiator 110 on the second antenna 1200 can be reduced, thereby improving the performance of the antenna located in the fuselage in the folded state.

[0032] Optionally, the foldable screen device further includes a second switch tuning circuit 400, and the second feed point 211 is grounded through the second switch tuning circuit 400;

[0033] When the second switching tuning circuit 400 is in the second state, the operating mode of the second radiator 210 is matched with the operating frequency band of the first antenna 1100, so that the second radiator 210 forms an auxiliary parasitic unit of the first antenna 1100.

[0034] The aforementioned second switching tuning circuit 400 may include two or more tuning sub-circuits controlled by a switching element. Different tuning sub-circuits can be switched based on the switch in the second switching tuning circuit 400 to achieve mode switching. The tuning sub-circuit can be various common tuning circuits. For example, a tuning sub-circuit may be a circuit comprising at least one of capacitors and inductors. When a tuning sub-circuit includes two or more components, the components can be connected in series and parallel, and the specific configuration can be adjusted as needed.

[0035] The aforementioned second state can refer to the state in which the second switching tuning circuit 400 conducts the second feed point 211 to ground through one of its included tuning sub-circuits. It is understood that the second switching tuning circuit 400 may include other states besides the second state, and when the second switching tuning circuit 400 is in other states, the second antenna 1200 can be tuned based on the second switching tuning circuit 400.

[0036] The fact that the operating mode of the second radiator 210 matches the operating frequency band of the first antenna 1100 can mean that the second radiator 210 can generate a mode that radiates the operating frequency band of the first antenna 1100, that is, it is an auxiliary parasitic element of the first antenna 1100, which can help improve the aperture efficiency of the first antenna 1100. For example, a 1 / 2 wavelength mode can be excited in the second radiator 210 to help improve the aperture efficiency of the first antenna 1100, or a 1 / 4 wavelength mode can be excited in the second radiator 210 to help improve the aperture efficiency of the first antenna 1100, etc.

[0037] The above-mentioned second radiator 210 forming an auxiliary parasitic unit of the first antenna 1100 can mean that during the operation of the first antenna 1100, the second radiator 210 generates a parasitic mode of the first antenna 1100.

[0038] In some embodiments of this application, taking the first antenna 1100 as a Medium High Frequency Transmitter-Receiver (MHB TRX) antenna, the second antenna 1200 as a Global Positioning System (GPS L5) antenna, the third antenna 1300 as an N78 or N78 / 79 antenna, the fourth antenna 1400 as an N78 / wifi 5G antenna, and the fifth antenna 1500 as a GPS L1 / wifi 2.4G antenna as examples, the working modes of the antennas are further explained:

[0039] In some embodiments of this application, the first antenna 1100 can reuse the second switching tuning circuit 400 in the second antenna 1200 to tune the operating mode of the second radiator 210 to half the wavelength mode of the operating frequency band of the first antenna 1100, thereby improving the aperture efficiency of the first antenna 1100. In this case, the resonant mode in the second radiator 210 is located after the main resonance of the first antenna 1100. For example, the frequency corresponding to the resonant mode in the second radiator 210 is between 100MHz and 200MHz after the frequency corresponding to the main resonance of the first antenna 1100, that is, the frequency corresponding to the resonant mode in the second radiator 210 is 100MHz to 200MHz higher than the frequency corresponding to the main resonance of the first antenna 1100. Furthermore, the second antenna 1200 can also reuse the first switching tuning circuit 300 in the first antenna 1100 to tune the first radiator 110 to a quarter wavelength mode of the operating frequency band of the second antenna 1200, thereby improving the aperture efficiency of the second antenna 1200. For example, in... Figure 1 In the illustrated embodiment, when the first antenna 1100 operates in state B41, the second switch 750 conducts the first input terminal 755 and the fourth output terminal 754. In this way, in addition to increasing the aperture of the fourth antenna 1400, it can also tune its fundamental mode in the branch where the first radiator 110 is located, that is, the 1 / 4 wavelength monopole mode in the branch where the first radiator 110 is located. This resonant mode needs to be placed before the GPS L5 resonance, close to GPS L5, such as tuned to 1.05G~1.1G, so as to excite the same current in the top branch of the main / sub fuselage to a greater extent, thereby improving the aperture efficiency of GPS L5 by 0.5-1dB.

[0040] In this embodiment, by grounding the second feed point 211 through the second switching tuning circuit 400, since the second radiator 210's operating mode matches the first antenna 1100's operating frequency band when the second switching tuning circuit 400 is in the second state, the second switching tuning circuit 400 can be controlled to be in the second state when the foldable screen device is in the folded state. At this time, the operating mode of the second radiator 210 in the body opposite the first antenna 1100 in the folded state can be tuned to match the first antenna 1100's operating frequency band. The second radiator 210 forms an auxiliary parasitic unit for the first antenna 1100, so that the first antenna 1100's operating frequency band can reuse the aperture of the second radiator 210. This can improve the aperture efficiency of the first antenna 1100 while reducing the influence of the second radiator 210 on the first antenna 1100, thereby improving the performance of the antenna located in the body in the folded state.

[0041] Optionally, the first body 100 further includes a third radiator 120, with a first break 140 between the first radiator 110 and the third radiator 120. The third radiator 120 includes a third feed point 121, which is a radiator of the third antenna 1300, and the third feed point 121 is a feed point of the third antenna 1300. The foldable screen device further includes a third feed source 1310 and a third switch tuning circuit 500, with the third feed source 1310 electrically connected to the third feed point 121 through the third switch tuning circuit 500.

[0042] When the third switching tuning circuit 500 is in the third state, the third radiator 120 forms an auxiliary parasitic unit of the first antenna 1100.

[0043] When the first switching tuning circuit 300 is in the fourth state, the frame region between the first feed point 111 and the first break 140 forms the auxiliary parasitic unit of the third antenna 1300.

[0044] The aforementioned third radiator 120 forming an auxiliary parasitic element of the first antenna 1100 can mean that, during the operation of the first antenna 1100, the third radiator 120 generates a parasitic mode of the first antenna 1100. Correspondingly, the frame region between the first feed point 111 and the first break 140 forming an auxiliary parasitic element of the third antenna 1300 can mean that, during the operation of the third antenna 1300, the frame region between the first feed point 111 and the first break 140 generates a parasitic mode of the third antenna 1300.

[0045] The aforementioned third switching tuning circuit 500 may include two or more tuning sub-circuits controlled by a switching device. Different tuning sub-circuits can be switched based on the switch in the third switching tuning circuit 500 to achieve mode switching. The tuning sub-circuit may be various common tuning circuits; for example, it may be a circuit comprising at least one of capacitors and inductors. When a tuning sub-circuit includes two or more components, these components can be connected in series and parallel, and the specific configuration can be adjusted as needed.

[0046] It is understood that when the third switching tuning circuit 500 is in the third state, the third switching tuning circuit 500 can tune the operating mode of the third radiator 120 to the parasitic mode of the first antenna 1100. Correspondingly, when the first switching tuning circuit 300 is in the fourth state, the third switching tuning circuit 500 can tune the operating mode of the frame region between the first breaks 140 to the parasitic mode of the third antenna 1300.

[0047] In this embodiment, when the third switching tuning circuit 500 is in the third state, the operating mode of the third radiator 120 is the parasitic mode of the first antenna 1100. When the first switching tuning circuit 300 is in the fourth state, the operating mode of the frame area between the first feed point 111 and the first break 140 is the parasitic mode of the third antenna 1300. Thus, different states can be switched based on the third switching tuning circuit 500 to improve the aperture efficiency of the first antenna 1100 and the third antenna 1300.

[0048] Optionally, the third switching tuning circuit 500 includes a matching device 510, a fourth switching device 520, a tuning device unit 530, a tenth inductor 540, an eleventh inductor 550, and a twelfth inductor 560. The fourth switching device 520 includes a second input terminal 521, a fifth output terminal 522, a sixth output terminal 523, a seventh output terminal 524, and an eighth output terminal 525. The third feed point 121 is electrically connected to the second input terminal 521 through the matching device 510. The fifth output terminal 522 is electrically connected to the third feed source 1310 through the tuning device unit 530. The sixth output terminal 523 is grounded through the tenth inductor 540. The seventh output terminal 524 is grounded through the eleventh inductor 550. The eighth output terminal 525 is grounded through the twelfth inductor 560. The matching device 510 is a capacitor or an inductor. The inductance values ​​of any two of the tenth inductor 540, the eleventh inductor 550 and the twelfth inductor 560 are different.

[0049] Please see Figure 1In some embodiments of this application, the first antenna 1100 is an MHB TRX antenna, the first feed point 111 is located at the end of the first radiator 110, 1mm to 3mm away from the first break, the first radiator 110 is provided with a first switching tuning circuit 300 and a fifth switching tuning circuit 700, the entire first radiator 110 is the body radiation branch of the first antenna 1100, the length is 27-33mm (the length is generally half the wavelength of the MB resonant frequency band), the dipole mode at the top of the excitation point, the third antenna 1300 is an N78 or N78 / 79 antenna, the third feed point 121 is close to the end of the third radiator 120, the third feed point 121 is 3mm to 5mm away from the first break 140, the feed path of the third feed point 121 is provided with a third switching tuning circuit 500, wherein the third switching tuning circuit 500 is an SP4T switch, using one of the serial communication feed RF terminals, which is the third feed source 1310. The remaining three channels are parallel-tuned. In actual implementation, due to the need for thinness and lightness and large battery capacity in foldable screen devices, the antenna space layout is limited, resulting in four important antennas being arranged on the top of the main body. To solve this technical problem, this application embodiment adopts multi-antenna aperture multiplexing technology, which improves the aperture efficiency of each antenna in single-state and coexistence states in various scenarios. For example, if the body of the first antenna 1100 only uses the first radiator 110 and adopts dipole mode, the aperture is relatively small. Based on this, in this application embodiment, the radiation aperture of the first antenna 1100 is increased by multiplexing the third radiator 120, that is, by multiplexing the third switching tuning circuit 500 of the third antenna 1300 for tuning, constructing a body dipole mode + IFA parasitic large-aperture antenna mode to improve efficiency. At the same time, the third radiator 120 can also be tuned by multiplexing the parallel first switching tuning circuit 300 in the feed path of the first antenna 1100 in N78 single-state.

[0050] The fourth switch 520 in the third switching tuning circuit 500 described above can be an SP4T switch, and the feed switch topology of the third antenna 1300 is as follows: Figure 3As shown, the distance between the third feed point 121 and the first break 140 is approximately 3mm to 5mm. The first serial device is a matching device 510, which can be a small inductor or capacitor used to tune the initial impedance of N78. When the antenna operates in a single-state scenario within the frequency band of the third antenna 1300, the third switching tuning circuit 500 needs to switch to the tuning device unit 530, disconnecting other paths. Simultaneously, the first switching tuning circuit 300 of the first antenna 1100 is switched off, or a small capacitor is used to construct auxiliary parasitic tuning. The operating frequency band of this auxiliary parasitic tuning is located after the N78 frequency band, for example, parasitic tuning to 3.85G. This can improve the aperture efficiency of N78 by 0.5dB to 1dB. Correspondingly, when the antenna operates in a single-state scenario within the frequency band of the first antenna 1100, the third switching tuning circuit 500 needs to be reused to assist in tuning the third radiator 120, constructing a resonance after the main resonance of the first antenna 1100 to assist in parasitic tuning, thereby improving aperture efficiency.

[0051] In some embodiments of this application, the tenth inductor 540 is an inductor with a strength of 15nH to 20nH, the eleventh inductor 550 is an inductor with a strength of 7nH to 10nH, and the twelfth inductor 560 is an inductor with a strength of 3nH to 5nH. When the first antenna 1100 operates in the B3 band single-state scenario, the fourth switch 520 of the third switching tuning circuit 500 is switched to the off state. When the first antenna 1100 operates in the B41 single-state scenario, the fourth switch 520 of the third switching tuning circuit 500 simultaneously turns on the tenth inductor 540, the eleventh inductor 550, and the twelfth inductor 560.

[0052] The aforementioned tuning device unit 530 can be a tuning circuit composed of tuning devices.

[0053] In this embodiment, the third switching tuning circuit 500 includes a matching device 510, a fourth switching element 520, a tuning device unit 530, a tenth inductor 540, an eleventh inductor 550, and a twelfth inductor 560. The fourth switching element 520 includes a second input terminal 521, a fifth output terminal 522, a sixth output terminal 523, a seventh output terminal 524, and an eighth output terminal 525. The third feed point 121 is electrically connected to the second input terminal 521 through the matching device 510. The fifth output terminal 522 is electrically connected to the third feed source 1310 through the tuning device unit 530. The sixth output terminal 523 is connected to the tenth inductor 540. The seventh output terminal 524 is grounded through the eleventh inductor 550, and the eighth output terminal 525 is grounded through the twelfth inductor 560. The matching device 510 is a capacitor or an inductor. The inductance values ​​of any two of the tenth inductor 540, the eleventh inductor 550, and the twelfth inductor 560 are different. This is beneficial for tuning the operating mode of the third radiator 120 to the parasitic mode of the first antenna 1100 based on the third switch tuning circuit 500, and for tuning the operating mode of the frame area between the first breaks 140 to the parasitic mode of the third antenna 1300 based on the third switch tuning circuit 500.

[0054] Optionally, the first body 100 further includes a fourth radiator 130, the first radiator 110 being located between the fourth radiator 130 and the third radiator 120, and a second break 150 being provided between the fourth radiator 130 and the first radiator 110. The fourth radiator 130 includes a fourth feed point 131, which is a common radiator for the fourth antenna 1400 and the fifth antenna 1500. The fourth feed point 131 is a common feed point for the fourth antenna 1400 and the fifth antenna 1500. The foldable screen device further includes a fourth switch tuning circuit 600, and the fourth feed point 131 is grounded through the fourth switch tuning circuit 600.

[0055] Please see Figure 1 The fourth antenna 1400 further includes a fourth feed source 1410, which is electrically connected to the fourth feed point 131. The fifth antenna 1500 further includes a fifth feed source 1510, which is electrically connected to the fourth feed point 131.

[0056] The aforementioned fourth switching tuning circuit 600 may include two or more tuning sub-circuits controlled by a switching device. Different tuning sub-circuits can be switched based on the switch in the fourth switching tuning circuit 600 to achieve mode switching. The tuning sub-circuit may be various common tuning circuits; for example, it may be a circuit comprising at least one of capacitors and inductors. When a tuning sub-circuit includes two or more components, these components can be connected in series and parallel, and the specific configuration can be adjusted as needed.

[0057] In this embodiment, the fourth antenna 1400 and the fifth antenna 1500 are a shared feed antenna scheme, and isolation between the fourth antenna 1400 and the fifth antenna 1500 can be achieved through matching design. Specifically, the fourth antenna 1400 is an N78 / wifi 5G antenna, and the fifth antenna 1500 is a GPS L1 / wifi 2.4G antenna.

[0058] The aforementioned fourth switch tuning circuit 600 is a parallel tuning switch on the paths of the fourth antenna 1400 and the fifth antenna 1500. This switch is a scene-specific intelligent tuning switch for Antenna Coexistence Management (ACM). In related technologies, when the first antenna 1100 operates alone, it is usually necessary to switch the fourth feed point 131 to ground, that is, to short-circuit the fourth antenna 1400 and the fifth antenna 1500 to ground, in order to eliminate the influence of the fourth antenna 1400 and the fifth antenna 1500 on the first antenna 1100, thereby improving the aperture efficiency of the first antenna 1100. However, this also introduces a new problem, that is, when the cellular MHB performance reaches a relatively high level, the fourth antenna 1400 and the fifth antenna 1500 are short-circuited to ground at this time, resulting in no performance at all, such as not supporting dual-SIM scenarios like B3-N78.

[0059] In this embodiment, by grounding the fourth feed point 131 through the fourth switching tuning circuit 600, the fourth antenna 1400 and the fifth antenna 1500 can be adjusted through the fourth switching tuning circuit 600 to reduce the impact of the fourth antenna 1400 and the fifth antenna 1500 on the operation of the first antenna 1100. In this way, while ensuring that the aperture of the first antenna 1100 is large, the fourth antenna 1400 and the fifth antenna 1500 can be prevented from being directly grounded, thus allowing the first antenna 1100 and the antenna in the fourth radiator 130 to work simultaneously.

[0060] Optionally, the fourth switching tuning circuit 600 includes a first capacitor 610, a second capacitor 620, a third capacitor 630, a first inductor 650, a second inductor 640, and a first switching element 660. The fourth feed point 131 is grounded sequentially through the first capacitor 610, the second capacitor 620, the third capacitor 630, and the first switching element 660.

[0061] The first inductor 650 is connected in parallel across the two ends of the path formed by the second capacitor 620 and the third capacitor 630 connected in series. The end of the third capacitor 630 connected to the first switch 660 is also grounded through the second inductor 640.

[0062] In this embodiment, by introducing an LC tuning design through the fourth switching tuning circuit 600, it can be ensured that the fourth antenna 1400 is basically always present when the first antenna 1100 is in a superior single-state condition. The specific topology of the fourth switching tuning circuit 600 and its peripheral matching circuit is as follows: Figure 2As shown, the input terminal of the fourth switch tuning circuit 600 can be connected to the fourth feed point 131, specifically to the feed tabs of the fourth antenna 1400 and the fifth antenna 1500. The second inductor 640 is a switch bypass inductor with an inductance value of approximately 10nH to 22nH, used to cancel the parasitic capacitance (Coff) of the fourth switch tuning circuit 600, thereby reducing the parasitic capacitance of the switch body and significantly optimizing the initial impedance of the fifth antenna 1500. When the first switch 660 is closed, the fourth switch tuning circuit 600 can be equivalent to an LC circuit connected in series between the fourth feed point 131 and ground. This LC circuit presents a capacitance of 1.2pF to 2pF for the GPS L1 band and a large capacitance or small inductance for 2.4G, approximately a short circuit. Therefore, when this LC is conducting, it can deflect the resonance of GPS L1 and 2.4G without affecting the performance of the first antenna 1100 in the corresponding design, thus ensuring the superior aperture performance of the first antenna 1100. The first capacitor 610 is a 1pF to 2pF capacitor, the second capacitor 620 and the third capacitor 630 combined are equivalent to a 0.2pF to 0.4pF capacitor, and the first inductor 650 is a 2-3nH inductor. Since the fourth antenna 1400 operates in the same frequency band as the corresponding first antenna 1100 (N78 / 5G), there is no frequency conflict. Therefore, when the first antenna 1100 is in cellular single-state operation, the first antenna 1100 and the fourth antenna 1400 can coexist in a design. The LC circuit is a slightly larger inductor for N78 and a very small capacitor for 5G Wi-Fi, approximating a switch. When the LC circuit is on, the N78's standing wave ratio is still present, with a performance drop of about 1dB. The 5G Wi-Fi standing wave ratio remains basically unchanged, with performance fluctuations within 0.5dB. This can effectively ensure that the N78 / 5G performance remains largely consistent in the segmented scenarios of single-state cellular MHB, solving the problem of complete incompatibility and coexistence between the optimal state of the first cellular antenna 1100 and the corresponding antenna, such as the fourth antenna 1400, in related technologies.

[0063] In this embodiment, by making the fourth switching tuning circuit 600 include a first capacitor 610, a second capacitor 620, a third capacitor 630, a first inductor 650, a second inductor 640, and a first switch 660, and the fourth feed point 131 is grounded sequentially through the first capacitor 610, the second capacitor 620, the third capacitor 630, and the first switch 660; the first inductor 650 is connected in parallel across the two ends of the path formed by the second capacitor 620 and the third capacitor 630 in series, and the end of the third capacitor 630 connected to the first switch 660 is also grounded through the second inductor 640, thus enabling the first antenna 1100 and the antenna in the fourth radiator 130 to work simultaneously when the aperture of the first antenna 1100 is large during the operation of the first antenna 1100.

[0064] Optionally, the first radiator 110 further includes a first tuning point 112, wherein the ratio of the distance between the first tuning point 112 and the second break 150 to the length of the first radiator 110 is between 1 / 4 and 1 / 3; the folding screen device further includes a fifth switch tuning circuit 700, wherein the first tuning point 112 is grounded through the fifth switch tuning circuit 700.

[0065] In some embodiments of this application, both the fourth antenna 1400 and the fifth antenna 1500 can reuse a portion of the branches in the first radiator 110 to improve aperture efficiency. For example, in WIFI 5G, the frame region between the first tuning point 112 and the second break 150 in the first radiator 110 is used to construct an auxiliary mode to improve aperture. In this case, by reusing the fifth switching tuning circuit 700 to tune the auxiliary parasitic resonance, the aperture efficiency of the fourth antenna 1400 and the fifth antenna 1500 can be significantly improved. Based on this, the embodiments of this application further design the specific structure of the fifth switching tuning circuit 700. The distance between the first tuning point 112 and the second break 150 is 5mm to 8mm. Because the introduction of the fifth switching tuning circuit 700 at the end of the first antenna 1100 causes a conflict, the use of the fifth switching tuning circuit 700 for auxiliary tuning will inevitably lead to resonance fluctuations in the operating frequency band of the first antenna 1100. Therefore, the embodiments of this application optimize the structure of the fifth switching tuning circuit 700 to achieve the use of the fifth switching tuning circuit 700 for switching tuning of the apertures of the fourth antenna 1400 and the fifth antenna 1500, while taking into account the antenna performance of the first antenna 1100.

[0066] Please see Figure 4 The topology is matched to the design of the fifth switch tuning circuit 700:

[0067] The input terminal of the fifth switching tuning circuit 700 is electrically connected to the first tuning point 112. The first tuning point 112 is about 5mm to 8mm away from the second break 150. This distance is about 1 / 4 to 1 / 3 of the length of the entire first radiator 110. This can ensure the aperture efficiency of the monopole mode of the branch between the excited first tuning point 112 and the second break 150, and can also avoid the first tuning point 112 being too close to the middle position of the first radiator 110, which would excite the common-mode parasitic mode at its top (the 2.4G excited by this mode has reverse current, which makes it impossible to achieve optimal auxiliary aperture efficiency improvement for WIFI 2.4G).

[0068] In this embodiment, by including a first tuning point 112 in the first radiator 110, the ratio of the distance between the first tuning point 112 and the second break 150 to the length of the first radiator 110 is between 1 / 4 and 1 / 3; the folding screen device also includes a fifth switching tuning circuit 700, through which the first tuning point 112 is grounded. In this way, while ensuring that the first antenna 1100 has good aperture efficiency, the aperture efficiency of the fourth antenna 1400 and the fifth antenna 1500 can be further improved.

[0069] Optionally, the fifth switching tuning circuit 700 includes an electrostatic discharge (ESD) device, a fourth capacitor 720, a third inductor 730, a second switch 750, a fourth inductor 760, a fifth inductor 780, a fifth capacitor 770, a sixth inductor 790, a seventh inductor 7100, a sixth capacitor 7110, and a seventh capacitor 7120. The second switch 750 includes a first input terminal 755, a first output terminal 751, a second output terminal 752, a third output terminal 753, and a fourth output terminal 754.

[0070] The first tuning point 112 is grounded through the electrostatic discharge device 710, and the first tuning point 112 is also electrically connected to the first input terminal 755 through the fourth capacitor 720. One end of the fourth capacitor 720 connected to the first input terminal 755 is grounded through the third inductor 730.

[0071] The first output terminal 751 is grounded sequentially through the fourth inductor 760 and the fifth capacitor 770, and the fifth inductor 780 is connected in parallel across the two ends of the path formed by the fourth inductor 760 and the fifth capacitor 770 in series; the second output terminal 752 is grounded through the sixth inductor 790; the third output terminal 753 is grounded sequentially through the seventh inductor 7100 and the sixth capacitor 7110; and the fourth output terminal 754 is grounded through the seventh capacitor 7120.

[0072] Please refer to Figure 4This is a schematic diagram of the fifth switching tuning circuit 700 in this embodiment. The first-stage access module from the first tuning point 112 is a switch-compatible Sar-sensor standard circuit 740. In this standard circuit 740, the first stage is a parallel ESD device, and the second stage is a series fourth capacitor 720. This fourth capacitor can be one or two series capacitors with a size of 11pF to 33pF. The third stage is a parallel third inductor 730, used to ground the Sar-sensor signal; it is generally a large inductor, at least 10nH. When the fourth antenna 1400 operates in the N78 band, the fifth switching tuning circuit 700 is switched off, multiplexing the branch between the first tuning point 112 and the second disconnect 150, exciting a 3.85G parasitic resonance, and helping to improve the N78 system efficiency by at least 1dB. This improvement includes impedance improvement and aperture efficiency improvement. When the fifth antenna 1500 operates in the WIFI 2.4G band, if it is in WIFI single-mode, the second switch 750 conducts the first input terminal 755 and the first output terminal 751, that is, the switch is on a 3-stage LC circuit, including a series two-stage LC circuit and a parallel L circuit. The actual design difficulty lies in the fact that when the fifth switch tuning circuit 700 conducts this LC circuit, it must also be compatible with the MHB band of the first antenna 1100. Therefore, the design of this 3-stage LC circuit is very critical. First, the series LC circuit is designed to be equivalent to a capacitance of 1pF to 1.5pF for the 2.55G band. Here, the series LC circuit refers to the LC structure formed by the fourth inductor 760 and the fifth capacitor 770 connected in series. The fifth capacitor 770 has a capacitance of 0.5pF, and the fourth inductor 760 has an inductance of 5nH to 6nH. This allows the series LC to construct a 1 / 4 wavelength mode of the branch between the first tuning point 112 and the second break 150 in the 2.5G to 2.6G frequency band, in order to help improve the impedance and aperture efficiency of the first antenna 1100 at the 2.4G frequency point, and ultimately improve the system efficiency by about 1dB.However, this series LC circuit also has a relatively large capacitance for the MHB. When the WIFI 2.4G and the cellular first antenna 1100 coexist, the large capacitance at the end of the MHB causes severe antenna frequency deviation and a significant performance degradation. Therefore, using only this series LC circuit is not feasible. Thus, a fifth inductor 780 is added in parallel to the series LC circuit. This fifth inductor 780 is a large inductor, typically 10nH to 15nH. This results in a final 3-stage LC circuit that is equivalent to an open circuit for the B3 band and a very small equivalent capacitance for the B39 band. The equivalent capacitance of 0.1pF to 0.5pF for B1 has little impact on 2.55G, because the high frequency is already grounded through a single series LC circuit. Therefore, this three-stage LC circuit can be compatible with the coexistence of the WIFI 2.4G band of the fifth antenna 1500 and the B3 / B39 band of the first antenna 1100. When B1 and WIFI 2.4G coexist, the second switch 750 needs to simultaneously turn on the first input terminal 755 and the first output terminal 751, as well as the first input terminal 755 and the second output terminal 752. The purpose of turning on the first input terminal 755 and the second output terminal 752 is mainly to correct the B1 frequency deviation caused by the three-stage LC circuit that turns on the first output terminal 751, thereby achieving the coexistence of WIFI 2.4G and B1. The inductance value of the sixth inductor 790 is about 10nH. Figures 5(a) and 5(b) show the differences in Smith impedance and efficiency of the fifth antenna 1500 when the branch aperture of the first antenna 1100 is reused and not reused in the 2.4G band, with the first antenna 1100 in state B1. Figure 5(a) shows that after the fifth antenna 1500 reuses the parasitic mode of the branch aperture of the first antenna 1100 in the WIFI 2.4G band (resonating at 2.6G), its Smith impedance converges more towards 50 ohms, and the mismatch loss is reduced. Figure 5(b) shows that by introducing the parasitic mode of the reuse of the branch of the first antenna 1100, the aperture and efficiency of the WIFI 2.4G band are improved by 0.7dB and 1.7dB, respectively. In Figures 5(a) and 5(b), ANT1 represents the first antenna, and ANT5 represents the fifth antenna.

[0073] However, when WIFI 2.4G and B40 / 41 coexist, the second switch 750 cannot turn on the first output terminal 751 because the equivalent capacitance of this LC to B40 / 41 is large, and it is almost grounded, which has too much impact on the impedance and aperture of the B40 / 41 frequency band. Therefore, the second switch 750 is in the off state under this coexistence state.

[0074] Furthermore, the GPS L1 band of the fifth antenna 1500 also needs to reuse the branch in the first antenna 1100 to improve the aperture. When the first antenna 1100 is in MB state, the B3 band mainly improves the GPS L1 aperture efficiency, while the B39 / B1 band improves it less. When the first antenna 1100 is in B40 / 41 state, the frequency is far from GPS L1. At this time, the branch of the first antenna 1100 has almost no auxiliary improvement for GPS L1. Therefore, the second switch 750 needs to turn on the third output terminal 753 to construct an auxiliary resonance near 1.8G to improve the GPS L1 aperture efficiency. That is, the resonant point of the LC circuit connected in series at the third output terminal 753 is approximately 1.8G to 1.9G. This allows the monopole generated between the first tuning point 112 and the second break point 150 to be approximately around 1.8G, which can help improve GPS L1 by about 0.3dB. At the same time, the equivalent inductance of B41 / 40 is not too small. A value of 5nH or more has little impact on B40 / 41. In the series LC circuit, the inductance of the seventh inductor 7100 is 13nH to 18nH, and the capacitance of the sixth capacitor 7110 is about 0.5pF.

[0075] In this embodiment, the fifth switching tuning circuit 700 includes an electrostatic discharge device 710, a fourth capacitor 720, a third inductor 730, a second switching element 750, a fourth inductor 760, a fifth inductor 780, a fifth capacitor 770, a sixth inductor 790, a seventh inductor 7100, a sixth capacitor 7110, and a seventh capacitor 7120. The second switching element 750 includes a first input terminal 755, a first output terminal 751, a second output terminal 752, a third output terminal 753, and a fourth output terminal 754. The first tuning point 112 is grounded through the electrostatic discharge device 710, and the first tuning point 112 is also electrically connected to the first input terminal 755 through the fourth capacitor 720. The fourth capacitor 720 is connected to the... One end of the first input terminal 755 is connected to ground through the third inductor 730; the first output terminal 751 is grounded sequentially through the fourth inductor 760 and the fifth capacitor 770, and the fifth inductor 780 is connected in parallel across the two ends of the path formed by the series connection of the fourth inductor 760 and the fifth capacitor 770; the second output terminal 752 is grounded through the sixth inductor 790; the third output terminal 753 is grounded sequentially through the seventh inductor 7100 and the sixth capacitor 7110; the fourth output terminal 754 is grounded through the seventh capacitor 7120. This facilitates the improvement of the aperture efficiency of the fourth antenna 1400 and the fifth antenna 1500 while ensuring that the first antenna 1100 has good aperture efficiency.

[0076] Optionally, please see Figure 6The first radiator 110 also includes a second tuning point 113, which is located in the middle region of the first radiator 110. The foldable screen device also includes a sixth switch tuning circuit 1600, through which the second tuning point 113 is grounded.

[0077] Figure 6 The illustrated embodiment is in Figure 1 A further improvement based on the illustrated embodiment, the main difference being the addition of a sixth switch tuning circuit 1600 in the middle region of the first radiator 110. Specifically, the second tuning point 113 can be located near the center of the first radiator 110, approximately 10mm to 12mm from the second break 150. The main purpose of introducing the sixth switch tuning circuit 1600 is to optimize the large performance fluctuation of GPS L1 when the fifth antenna 1500 and the first antenna 1100 coexist. Figure 1 In the illustrated embodiment, although the fifth switching tuning circuit 700 can optimize the aperture of GPS L1 by switching the LC auxiliary resonance in state B40 / 41, the multiplexed aperture size is insufficient because the first tuning point 112 is too close to the end of the first radiator 110, thus limiting the improvement in GPS L1 performance. For example, in state B40 / 41, when the second switch 750 switches the first input terminal 755 and the third output terminal 753, the average improvement in GPS L1 is only 0.2dB to 0.3dB. On the other hand, a sixth switching tuning circuit 1600 is set near the second tuning point 113 in the first radiator 110, which is relatively... Figure 1 The embodiment shown can better accommodate the coexistence performance of GPS L1 of the fifth antenna 1500 and B39 / B1 / B40 / 41 of the first antenna 1100, mainly because the second tuning point 113 corresponds to the high current region of the 1 / 2 wavelength dipole mode of the MHB branch. Switching different paths in the sixth switching tuning circuit 1600 at this point is not sensitive to MHB, while providing a large-aperture auxiliary resonant multiplexing for GPS L1 of the fifth antenna 1500.

[0078] In this embodiment, by including a second tuning point 113 in the first radiator 110, the second tuning point 113 being located in the middle region of the first radiator 110, and the folding screen device further including a sixth switch tuning circuit 1600, the second tuning point 113 being grounded through the sixth switch tuning circuit 1600, thus, a large-aperture auxiliary resonant multiplexing can be provided for the GPS L1 of the fifth antenna 1500 without affecting the MHB.

[0079] Optionally, please see Figure 6The sixth switching tuning circuit 1600 includes an eighth capacitor 1610, a ninth capacitor 1620, an eighth inductor 1630, a ninth inductor 1650, and a third switching element 1640.

[0080] The second tuning point 113 is grounded sequentially through the eighth capacitor 1610, the ninth capacitor 1620, the eighth inductor 1630 and the third switch 1640, and one end of the ninth capacitor 1620 connected to the eighth inductor 1630 is grounded through the ninth inductor 1650.

[0081] The aforementioned third switch 1640 can be an SPST; please refer to [link / reference]. Figure 6 Starting from the second tuning point 113, capacitors 1610 (eighth capacitor) and 1620 (ninth capacitor) are connected in series, and then inductor 1650 (ninth inductor) is connected in parallel. Inductor 1650 is a large inductor with an inductance value of 30nH to 82nH. This is an isolation circuit compatible with SAR-sensors. It should be noted that the sixth switching tuning circuit 1600 also switches the LC circuit. This LC circuit is mainly composed of the eighth capacitor 1610, the ninth capacitor 1620, and the eighth inductor 1630. The eighth capacitor 1610 and the ninth capacitor 1620 are connected in series and are equivalent to a capacitor of about 0.5pF. The inductance of the eighth inductor 1630 is 13nH to 18nH, so that the resonant point of the LC circuit is set between 18G and 1.85G. When the third switch 1640 is turned on, it will excite the auxiliary parasitic mode between 1.68G and 1.7G on the branch between the second tuning point 113 and the second feed point 211, so as to improve the aperture and system efficiency of the GPS L1 multiplexing of the fifth antenna 1500, while not affecting B40 / 41. This is because the second tuning point 113 is located in the high current region of the top dipole mode, and the switching on and off of the third switch 1640 will not affect the impedance and frequency offset of B40 / 41. Figure 7 for Figure 1 The illustrated embodiments and Figure 6 The GPS L1 efficiency comparison curves of the fifth antenna 1500 and the first antenna 1100 in the coexistence state shown in the embodiment are illustrated. Figure 7 It can be seen that when the third switching element 1640 is turned on, relative to Figure 1 In the illustrated embodiment, the second switch 750, by connecting the first input terminal 755 and the third output terminal 753, can also construct an auxiliary parasitic multiplexing for GPS L1. Figure 6 The GPS L1 aperture efficiency of the illustrated embodiment is approximately 0.3 dB higher, resulting in an average system efficiency improvement of 0.4 dB and a peak efficiency improvement of 0.5 dB. Figure 6 The scheme of the illustrated embodiment can further optimize the performance in GPS L1 and cellular coexistence mode. Specifically, in... Figure 7 In the diagram, ANT1 represents the first antenna, and ANT5 represents the fifth antenna.

[0082] Please refer to Tables 1 and 2 below, which provide... Figure 1 The illustrated embodiments and Figure 6 The comparison of GPS L1 performance fluctuations in the deployed state of the illustrated embodiments is shown in Tables 1 and 2. Figure 1 In the embodiment shown, the performance fluctuation of GPS L1 when switching between different frequency bands in the cellular MHB is 1.7dB / 1.2dB, respectively. Figure 6 The embodiment shown further optimizes the GPS L1 performance in B40 / 41 states, so the performance fluctuations in unfolded / folded states are 1.3dB / 0.7dB, respectively. The performance fluctuation in folded state can be optimized to within 1dB, which basically meets the design standards and further improves the navigation and positioning experience in user-specific scenarios.

[0083] Table 1: Figure 1 The performance of the fifth antenna 1500 in GPS L1 and the first antenna 1100 in various states in the embodiment shown is illustrated.

[0084]

[0085] Table 2: Figure 6 The performance of the fifth antenna 1500 in GPS L1 and the first antenna 1100 in various states in the embodiment shown is illustrated.

[0086]

[0087] It should be noted that the operating frequency band of the first antenna 1100 in this embodiment is not limited to the MHB band, but also applies to the Ultra High Band (UHB) band. This will not be elaborated upon here. Additionally, when... Figure 6 The same effect can be achieved when the antenna is positioned on the side or bottom of the foldable screen device, as described in the embodiment.

[0088] In this embodiment, by making the sixth switching tuning circuit 1600 include an eighth capacitor 1610, a ninth capacitor 1620, an eighth inductor 1630, a ninth inductor 1650, and a third switch 1640, and by grounding the second tuning point 113 sequentially through the eighth capacitor 1610, the ninth capacitor 1620, the eighth inductor 1630, and the third switch 1640, and by grounding one end of the ninth capacitor 1620 connected to the eighth inductor 1630 through the ninth inductor 1650, it is beneficial to provide a large-aperture auxiliary resonant multiplexing for the GPS L1 of the fifth antenna 1500 without affecting the MHB.

[0089] Optionally, please see Figure 1 and Figure 6 The second body 200 further includes a fifth radiator 220 and a sixth radiator 230. The second radiator 210 is located between the fifth radiator 220 and the sixth radiator 230. There is a third break 240 between the fifth radiator 220 and the second radiator 210, and there is a fourth break 250 between the sixth radiator 230 and the second radiator 210. When the foldable screen device is in the folded state, the third break 240 is opposite to the second break 150, and the fourth break 250 is opposite to the first break 140.

[0090] The foldable screen device further includes a seventh switch tuning circuit 800 and an eighth switch tuning circuit 900. The fifth radiator 220 includes a third tuning point 221, and the sixth radiator 230 includes a fourth tuning point 231. The third tuning point 221 is grounded through the seventh switch tuning circuit 800, and the fourth tuning point 231 is grounded through the eighth switch tuning circuit 900.

[0091] The aforementioned seventh switch tuning circuit 800 may include two or more tuning sub-circuits controlled by a switch. Different tuning sub-circuits can be switched based on the switch in the seventh switch tuning circuit 800 to achieve mode switching. The tuning sub-circuit may be various common tuning circuits; for example, it may be a circuit comprising at least one of capacitors and inductors. When a tuning sub-circuit includes two or more components, these components can be connected in series and parallel, and the specific configuration can be adjusted as needed.

[0092] Accordingly, the aforementioned eighth switch tuning circuit 900 may include two or more tuning sub-circuits controlled by a switch. Different tuning sub-circuits can be switched based on the switch in the eighth switch tuning circuit 900 to achieve mode switching. The tuning sub-circuit may be various common tuning circuits; for example, it may be a circuit comprising at least one of capacitors and inductors. When a tuning sub-circuit includes two or more components, these components can be connected in series and parallel, and the specific configuration can be adjusted as needed.

[0093] In this embodiment, by further including a seventh switching tuning circuit 800 and an eighth switching tuning circuit 900 in the foldable screen device, the fifth radiator 220 includes a third tuning point 221, and the sixth radiator 230 includes a fourth tuning point 231. The third tuning point 221 is grounded through the seventh switching tuning circuit 800, and the fourth tuning point 231 is grounded through the eighth switching tuning circuit 900. Thus, when the foldable screen device is in a folded state, the fourth antenna 1400 and the fifth antenna 1500 can be tuned based on the seventh switching tuning circuit 800 to reduce the influence of the second body 200 on the fourth antenna 1400 and the fifth antenna 1500. Correspondingly, when the foldable screen device is in a folded state, the third antenna 1300 can be tuned based on the eighth switching tuning circuit 900 to reduce the influence of the second body 200 on the third antenna 1300.

[0094] The foldable screen device provided in this application embodiment has at least the following beneficial effects:

[0095] The scenario-based intelligent antenna tuning scheme in this application incorporates an ACM (Active Computing) design, which ensures optimal antenna performance in different scenarios. For example, it can be configured for single-cell mode, single WIFI / GPS mode, and coexistence of various scenarios. At the same time, it employs multi-antenna multiplexing aperture technology to ensure optimal antenna aperture in single-mode and coexistence scenarios. Furthermore, this application can effectively solve the problems of limited antenna layout in extreme space environments and insufficient antenna performance in subdivided coexistence scenarios, and can be widely promoted and applied in projects.

[0096] Furthermore, by adding a sixth switch tuning circuit 1600 to the first radiator 110, the main purpose is to optimize the GPS L1 performance of the fifth antenna 1500 in the coexistence state of the GPS L1 and the first antenna 1100 in the B40 / 41 coexistence state. This can solve the problem of large performance fluctuations of GPS L1 in the coexistence state of the fifth antenna 1500 and the first antenna 1100 in the MHB coexistence state, and further improve the navigation and positioning experience in user-specific scenarios.

[0097] The embodiments of this application have been described above with reference to the accompanying drawings. However, this application is not limited to the specific embodiments described above. The specific embodiments described above are merely illustrative and not restrictive. Those skilled in the art can make many other forms under the guidance of this application without departing from the spirit and scope of the claims, and all of these forms are within the protection scope of this application.

Claims

1. A foldable screen device, characterized in that, The device includes a first body, a second body, and a first switching tuning circuit. The first body and the second body are rotatably connected. The first body includes a first radiator, and the second body includes a second radiator. The first radiator includes a first feed point, and the second radiator includes a second feed point. The first radiator is the radiator of the first antenna, and the second radiator is the radiator of the second antenna. The first feed point is the feed point of the first antenna, and the second feed point is the feed point of the second antenna. The first feed point is grounded through the first switching tuning circuit. When the foldable screen device is in a folded state, the first radiator and the second radiator are opposite each other. When the first switching tuning circuit is in the first state, the first radiator forms an auxiliary parasitic element of the second antenna.

2. The folding screen device of claim 1, wherein, The foldable screen device also includes a second switch tuning circuit, and the second power supply point is grounded through the second switch tuning circuit. When the second switching tuning circuit is in the second state, the second radiator forms an auxiliary parasitic element of the first antenna.

3. The folding screen device of claim 1, wherein, The first fuselage also includes a third radiator, with a first break between the first radiator and the third radiator. The third radiator includes a third feed point, and the third radiator is the radiator of the third antenna. The third feed point is the feed point of the third antenna. The foldable screen device also includes a third feed source and a third switch tuning circuit. The third feed source is electrically connected to the third feed point through the third switch tuning circuit. When the third switching tuning circuit is in the third state, the third radiator forms an auxiliary parasitic element of the first antenna; When the first switching tuning circuit is in the fourth state, the frame region between the first feed point and the first break forms the auxiliary parasitic unit of the third antenna.

4. The folding screen device according to claim 3, wherein, The first fuselage also includes a fourth radiator, which is located between the fourth radiator and the third radiator, and there is a second break between the fourth radiator and the first radiator. The fourth radiator includes a fourth feed point, which is a common radiator for the fourth antenna and the fifth antenna. The fourth feed point is a common feed point for the fourth antenna and the fifth antenna. The foldable screen device also includes a fourth switch tuning circuit, and the fourth feed point is grounded through the fourth switch tuning circuit.

5. The folding screen device of claim 4, wherein, The fourth switching tuning circuit includes a first capacitor, a second capacitor, a third capacitor, a first inductor, a second inductor, and a first switch. The fourth feed point is grounded sequentially through the first capacitor, the second capacitor, the third capacitor, and the first switch. The first inductor is connected in parallel across the two ends of the path formed by the second capacitor and the third capacitor in series. The end of the third capacitor connected to the first switch is also grounded through the second inductor.

6. The foldable screen device according to claim 4, characterized in that, The first radiator further includes a first tuning point, and the ratio of the distance between the first tuning point and the second break to the length of the first radiator is between 1 / 4 and 1 / 3; the folding screen device further includes a fifth switch tuning circuit, and the first tuning point is grounded through the fifth switch tuning circuit.

7. The folding screen device of claim 6, wherein, The fifth switch tuning circuit includes an electrostatic discharge device, a fourth capacitor, a third inductor, a second switch, a fourth inductor, a fifth inductor, a fifth capacitor, a sixth inductor, a seventh inductor, a sixth capacitor, and a seventh capacitor. The second switch includes a first input terminal, a first output terminal, a second output terminal, a third output terminal, and a fourth output terminal. The first tuning point is grounded through the electrostatic discharge device, and the first tuning point is also electrically connected to the first input terminal through the fourth capacitor. One end of the fourth capacitor connected to the first input terminal is grounded through the third inductor. The first output terminal is grounded in sequence through the fourth inductor and the fifth capacitor, and the fifth inductor is connected in parallel across the two ends of the path formed by the fourth inductor and the fifth capacitor in series. The second output terminal is grounded through the sixth inductor; the third output terminal is grounded through the seventh inductor and the sixth capacitor in sequence; the fourth output terminal is grounded through the seventh capacitor.

8. The folding screen device of claim 6, wherein, The first radiator further includes a second tuning point located in the middle region of the first radiator. The foldable screen device also includes a sixth switch tuning circuit, through which the second tuning point is grounded.

9. The folding screen device of claim 8, wherein, The sixth switching tuning circuit includes an eighth capacitor, a ninth capacitor, an eighth inductor, a ninth inductor, and a third switching element. The second tuning point is grounded sequentially through the eighth capacitor, the ninth capacitor, the eighth inductor, and the third switch. One end of the ninth capacitor connected to the eighth inductor is grounded through the ninth inductor.

10. The foldable screen device according to claim 4, characterized in that, The second body also includes a fifth radiator and a sixth radiator. The second radiator is located between the fifth radiator and the sixth radiator. There is a third break between the fifth radiator and the second radiator, and a fourth break between the sixth radiator and the second radiator. When the foldable screen device is in the folded state, the third break is opposite to the second break, and the fourth break is opposite to the first break. The foldable screen device further includes a seventh switch tuning circuit and an eighth switch tuning circuit. The fifth radiator includes a third tuning point, and the sixth radiator includes a fourth tuning point. The third tuning point is grounded through the seventh switch tuning circuit, and the fourth tuning point is grounded through the eighth switch tuning circuit.

11. The folding screen device of claim 3, wherein, The third switching tuning circuit includes a matching device, a fourth switching device, a tuning device unit, a tenth inductor, an eleventh inductor, and a twelfth inductor. The fourth switching device includes a second input terminal, a fifth output terminal, a sixth output terminal, a seventh output terminal, and an eighth output terminal. The third feed point is electrically connected to the second input terminal through the matching device. The fifth output terminal is electrically connected to the third feed source through the tuning device unit. The sixth output terminal is grounded through the tenth inductor, the seventh output terminal is grounded through the eleventh inductor, and the eighth output terminal is grounded through the twelfth inductor. The matching device is a capacitor or an inductor. The inductance values ​​of any two of the tenth, eleventh, and twelfth inductors are different.

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