Antenna of foldable equipment and foldable equipment

Abstract

The utility model relates to an antenna of foldable equipment and the foldable equipment. The antenna comprises a first radiating body, a second radiating body and a plurality of parasitic radiating bodies, the first radiating body, the second radiating body and the plurality of parasitic radiating bodies are fused on a first frame of a main body side and a second frame of a folding side, the first radiating body is provided with a first feeding point, the second radiating body is provided with a second feeding point, at least one of the plurality of parasitic radiating bodies is fused on the first frame, and at least one of the plurality of parasitic radiating bodies is fused on the second frame. And at least one is fused with the second frame. The scheme can meet the requirements of cellular communication and satellite communication.

Description

Technical Field

[0001] This application relates to the field of antenna technology, and more particularly, to an antenna for a foldable device and a foldable device. Background Art

[0002] Existing terminal devices mainly rely on the cellular network of ground base stations for data transmission. The cellular network has advantages such as high network density, good signal strength, and fast data transmission rate. However, in the case of damage to ground base stations, the cellular network cannot work. Therefore, satellite communication with higher reliability has gradually attracted people's attention, especially in emergency communication. Based on this, terminal devices that can support both cellular and satellite communication have emerged. Summary of the Invention

[0003] This application provides an antenna for a foldable device and a foldable device, which can meet the requirements of cellular communication and satellite communication.

[0004] An antenna for a foldable device, the foldable device includes a main body side and a folding side that can be relatively folded and unfolded. The antenna includes a first radiator, a second radiator, and a plurality of parasitic radiators integrated into the first frame of the main body side and the second frame of the folding side. The first radiator is provided with a first feeding point, the second radiator is provided with a second feeding point, and among the plurality of parasitic radiators, at least one is integrated into the first frame and at least one is integrated into the second frame.

[0005] Optionally, the first radiator and the second radiator are integrated into the first frame and are adjacent to each other at the top of the first frame. The first radiator and the second radiator are closer to the second frame than the parasitic radiators integrated into the first frame.

[0006] Optionally, the antenna further includes a first tuning circuit, one end of the first tuning circuit is connected to the first radiator, and the other end of the first tuning circuit is grounded.

[0007] Optionally, the plurality of parasitic radiators includes a first parasitic radiator and a second parasitic radiator integrated into the first frame. The first parasitic radiator is located at the top of the first frame, and the second parasitic radiator is located at the top of the side of the first frame away from the second frame.

[0008] Optionally, the antenna further includes a second tuning circuit and a third tuning circuit. One end of the second tuning circuit is connected to the first parasitic radiator, and the other end of the second tuning circuit is grounded. One end of the third tuning circuit is connected to the second parasitic radiator, and the other end of the third tuning circuit is grounded.

[0009] Optionally, the plurality of parasitic radiators further includes a third parasitic radiator and a fourth parasitic radiator integrated with the second frame. The third parasitic radiator is located at the top of the second frame and is symmetric to the first parasitic radiator with respect to the folding position. The fourth parasitic radiator is located at the top of the side of the second frame away from the side of the second frame and is symmetric to the second parasitic radiator with respect to the folding position.

[0010] Optionally, the antenna further includes a fourth tuning circuit and a fifth tuning circuit. One end of the fourth tuning circuit is connected to the third parasitic radiator, and the other end of the fourth tuning circuit is grounded. One end of the fifth tuning circuit is connected to the fourth parasitic radiator, and the other end of the fifth tuning circuit is grounded.

[0011] Optionally, the plurality of parasitic radiators further includes a fifth parasitic radiator and a sixth parasitic radiator integrated with the second frame. The fifth parasitic radiator and the sixth parasitic radiator are located at the top of the second frame. The fifth parasitic radiator is symmetric to the second radiator with respect to the folding position. The sixth parasitic radiator is symmetric to the first radiator with respect to the folding position.

[0012] Optionally, the antenna further includes a sixth tuning circuit and a seventh tuning circuit. One end of the sixth tuning circuit is connected to the fifth parasitic radiator, and the other end of the sixth tuning circuit is grounded. One end of the seventh tuning circuit is connected to the sixth parasitic radiator, and the other end of the seventh tuning circuit is grounded.

[0013] A foldable device includes:

[0014] A main body side including a first frame;

[0015] A folding side including a second frame; and

[0016] The antenna as described in any one of the above, the antenna being integrated with the first frame and the second frame.

[0017] This application provides an antenna for a foldable device and the foldable device. The antenna is compatible with two communication modes of satellite communication and cellular communication. It can not only search for and receive satellite signals, but also search for and receive signals from ground base stations. The antenna radiator is integrated with the first frame and the second frame of the foldable device, realizing the conformal shape of the antenna radiator with the first frame and the second frame, so that the antenna radiator is hidden in the overall structure of the foldable device, making the appearance more beautiful and concise, and convenient to carry. In addition, multiple parasitic radiators are respectively arranged on the first frame and the second frame, and the magnetic field coupling effect of each parasitic radiator at different positions can be utilized to ensure the performance of the antenna in both the folded and unfolded states. Description of the Drawings

[0018] Figure 1 is a schematic diagram of an antenna of a foldable device shown in an exemplary embodiment of the present application, where the foldable device is in an unfolded state;

[0019] Figure 2 is Figure 1 a schematic diagram of an antenna of a foldable device shown in

[0020] Figure 3 is a schematic diagram of a first tuning circuit shown in an exemplary embodiment of the present application. Detailed implementation manners

[0021] Here, the technical solutions in the embodiments (or "implementation manners") of the present application will be clearly and completely described in conjunction with the accompanying drawings. When the following description involves the accompanying drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements.

[0022] If there are terms related to directional indication or positional relationship in the embodiments of the present application (such as up, down, left, right, front, back, inside, outside, top, bottom, center, vertical, horizontal, longitudinal, transverse, length, width, counterclockwise, clockwise, axial, radial, circumferential, etc.), such terms are only used to explain the relative positional relationship and movement conditions between components in a specific posture (as shown in the accompanying drawings); if the specific posture changes, the directional indication or positional relationship will also change accordingly. In addition, the terms "first", "second", etc. involved in the embodiments of the present application are only for the purpose of convenient description and cannot be understood as indicating or implying relative importance.

[0023] Taking a handheld terminal as an example, the handheld terminal usually uses an external antenna to achieve cellular communication and satellite communication. There are usually two structures of the external antenna. One is an antenna in the form of a four-arm helix, which is four metal branches printed on a flexible circuit board and then wound around a dielectric rod. The other is an antenna in the form of a ceramic structure, which is an antenna shape designed and printed on a ceramic block, and can be printed into a single layer or a double layer. The circuit board is located below the ceramic block, and the feeding port is led out from the circuit board below the ceramic. The above two external antennas are relatively large in size. For example, the four-arm helix is very long, and an interface also needs to be reserved at the top of the terminal for fixing at the top, and the mobile phone and the antenna are separated into two parts. Another example is that the ceramic antenna is generally made in a planar form, the ceramic is very heavy, placed inside the terminal, and the ceramic dielectric constant needs to be very large. If the size is made small, the dielectric loss is very large and the performance is also not good. Based on this, the present application provides an antenna for a foldable device, which can make the appearance of the foldable device more concise and convenient to carry.

[0024] Please refer to Figure 1 and Figure 2 , Figure 1Schematic diagram of the antenna 100 of the foldable device shown in an exemplary embodiment of the present application, where the foldable device is in the unfolded state. Figure 2 is Figure 1 Schematic diagram of the antenna 100 of the foldable device shown in the figure, where the foldable device is in the folded state.

[0025] The present application provides an antenna 100, which is applied to a foldable device 200. Among them, the foldable device 200 includes a main body side 201 and a folding side 202 that can be folded relative to each other and unfolded relative to each other. The main body side 201 includes a first frame 2010, and the folding side 202 includes a second frame 2020. The first frame 2010 and the second frame 2020 are exposed on the outside of the foldable device 200. The first frame 2010 and the second frame 2020 can be set as rectangular frames, and the first frame 2010 and the second frame 2020 can be symmetric about the folding position.

[0026] The antenna 100 includes a plurality of antenna radiators integrated in the first frame 2010 and the second frame 2020, specifically a first radiator 10, a second radiator 20, and a plurality of parasitic radiators 30. The so-called "integration" here means that the antenna radiator is conformal with the first frame 2010 and the second frame 2020, and a plurality of mutually insulated metal branches in the first frame 2010 and the second frame 2020 are used as the antenna radiator. The antenna radiator is no longer set separately. In this way, the antenna radiator can be hidden in the foldable device, making the foldable device 200 beautiful, simple, and convenient to carry. A plurality of mutually insulated metal branches can be separated by a slit, and an insulating material can be provided at the slit to insulate each metal branch from each other.

[0027] The first radiator 10 is provided with a first grounding point G1 and a first feeding point K1, and the second radiator 20 is provided with a second grounding point G2 and a second feeding point K2. In the present application, the first radiator 10 is taken as a satellite antenna radiator and the second radiator 20 is taken as a cellular antenna radiator for illustration. The RF port of satellite communication is connected to the first radiator 10 through a first matching circuit M1 to form a first feeding point K1. The first feeding point K1 is used to feed the first radiator 10, and the first grounding point G1 is used for grounding. The first matching circuit M1 can adjust each frequency band in the satellite communication mode and realize the state switching between signal transmission and signal reception.

[0028] The RF port of cellular communication is connected to the second radiator 20 through a second matching circuit M2 to form a second feeding point K2. The second feeding point K2 is used to feed the second radiator 20, and the second grounding point G2 is used for grounding. The second matching circuit M2 can adjust each frequency band in the cellular communication mode and realize the state switching between signal transmission and signal reception.

[0029] Among the multiple parasitic radiators 30, at least one is integrated into the first frame 2010, and at least one is integrated into the second frame 2020. That is to say, the multiple parasitic radiators 30 are respectively arranged on the first frame 2010 of the main body side 201 and the second frame 2020 of the folding side 202. On the one hand, the multiple parasitic radiators 30 can improve the antenna gain, and on the other hand, they can also adjust the orientation of the antenna radiation pattern.

[0030] According to the above description, it can be known that the antenna 100 is compatible with two communication modes of satellite communication and cellular communication. It can not only search for and receive and transmit satellite signals, but also search for and receive and transmit signals from ground base stations. In addition, the antenna radiator is integrated into the first frame 2010 and the second frame 2020, realizing the conformal shape of the antenna radiator with the first frame 2010 and the second frame 2020, so that the antenna radiator is hidden in the overall structure of the foldable device 200, making the appearance more beautiful and concise and convenient to carry. It should also be noted that the multiple parasitic radiators 30 are respectively arranged on the first frame 2010 and the second frame 2020, and the magnetic field coupling effect of each parasitic radiator 30 at different positions can be utilized to ensure the performance of the antenna 100 in both the folded and unfolded states.

[0031] In one embodiment, as Figure 1 shown, the first radiator 10 and the second radiator 20 are integrated into the first frame 2010 and are adjacent to each other at the top of the first frame 2010. The first radiator 10 and the second radiator 20 are closer to the second frame 2020 than the parasitic radiator 30 integrated into the first frame 2010. In the embodiment using the rectangular first frame 2010, the top of the first frame 2010 can be the short side of the first frame 2010. With such an arrangement, the RF circuit can be only arranged on the main body side 201, which is convenient for the RF circuit to feed the first radiator 10 and the second radiator 20. Moreover, the arrangement positions of the first radiator 10 and the second radiator 20 can ensure that the radiation direction of the electromagnetic wave can generally face the top of the foldable device 200 and the area near the middle.

[0032] In one embodiment, the plurality of parasitic radiators 30 includes a first parasitic radiator 31 and a second parasitic radiator 32 integrated with the first frame 2010. The first parasitic radiator 31 is integrated with the top of the first frame 2010, and the second parasitic radiator 32 is integrated with the top of the side of the first frame 2010 away from the folding side. Among them, the first parasitic radiator 31 is grounded, and the second parasitic radiator 32 is grounded. For example, the first parasitic radiator 31 is located on the short side of the rectangular first frame 2010, and the second parasitic radiator 32 is located on the long side outside the rectangular first frame 2010 and near one end of the short side. With such an arrangement, at least two parasitic radiators 30 are integrated with the first frame 2010. For example, in the satellite communication mode, the first parasitic radiator 31 and the second parasitic radiator 32 can be coupled with the magnetic field of the first radiator 10 to improve the satellite communication performance of the antenna 100. In the cellular communication mode, the first parasitic radiator 31 and the second parasitic radiator 32 can be coupled with the magnetic field of the second radiator 20 to improve the cellular communication performance of the antenna 100.

[0033] To further improve the performance of the antenna 100, the antenna 100 further includes a first tuning circuit T11. One end of the first tuning circuit T11 is connected to be close to the first radiator 10, and the other end of the first tuning circuit T11 is grounded. With such an arrangement, the first tuning circuit T11 can also provide a tuning current to the first radiator 10, strengthen the electromagnetic field of the first radiator 10, and improve the performance of the satellite antenna.

[0034] It should also be noted that in the satellite communication mode, the second radiator 20 acts as a parasitic radiator and realizes electromagnetic coupling with the first radiator 10. At this time, the second matching circuit M2 acts as a tuning circuit and is tuned to the vicinity of the frequency of satellite communication to improve the performance of the satellite antenna.

[0035] In one embodiment, the antenna 100 further includes a second tuning circuit T12 and a third tuning circuit T13. One end of the second tuning circuit T12 is connected to the first parasitic radiator 31, and the other end of the second tuning circuit T12 is grounded. One end of the third tuning circuit T13 is connected to the second parasitic radiator 32, and the other end of the third tuning circuit T13 is grounded. The second tuning circuit T12 is used to enhance or weaken the current of the first parasitic radiator 31, and the third tuning circuit T13 is used to enhance or weaken the current of the second parasitic radiator 32, thereby adjusting the radiation direction of the antenna 100.

[0036] Please continue to refer to Figure 1, the multiple parasitic radiators 30 further include a third parasitic radiator 33 and a fourth parasitic radiator 34 integrated with the second side frame 2020. The third parasitic radiator 33 is located at the top of the second side frame 2020 and is symmetric with the third parasitic radiator 33 about the folding position. The fourth parasitic radiator 34 is located at the top of the side of the second side frame 2020 away from the first side frame 2010 and is symmetric with the fourth parasitic radiator 34 about the folding position. Among them, the third parasitic radiator 33 is grounded, and the fourth parasitic radiator 34 is grounded. With such a setting, in the satellite communication mode, the third parasitic radiator 33 and the fourth parasitic radiator 34 can be coupled with the magnetic field of the first radiator 10 to improve the performance of the satellite antenna. In the cellular communication mode, the third parasitic radiator 33 and the fourth parasitic radiator 34 can also be coupled with the magnetic field of the second radiator 20 to improve the performance of the cellular antenna. In addition, in the folded state, the first parasitic radiator 31 is opposite to the third parasitic radiator 33, and the second parasitic radiator 32 is opposite to the fourth parasitic radiator 34, realizing the reconstruction of the satellite antenna and the cellular antenna.

[0037] To improve the performance of the antenna 100, the antenna 100 further includes a fourth tuning circuit T21 and a fifth tuning circuit T22. One end of the fourth tuning circuit T21 is connected to the third parasitic radiator 33, and the other end of the fourth tuning circuit T21 is grounded. One end of the fifth tuning circuit T22 is connected to the fourth parasitic radiator 34, and the other end of the fifth tuning circuit T22 is grounded. The fourth tuning circuit T21 is used to enhance or weaken the current of the third parasitic radiator 33, and the fifth tuning circuit T22 is used to enhance or weaken the current of the fourth parasitic radiator 34, for adjusting the radiation direction of the antenna 100.

[0038] In one embodiment, the plurality of parasitic radiators 30 further includes a fifth parasitic radiator 35 and a sixth parasitic radiator 36 integrated with the second frame 2020. The fifth parasitic radiator 35 and the sixth parasitic radiator 36 are located at the top of the second frame 2020. The fifth parasitic radiator 35 is symmetric with the second radiator 20 about the folding position, and the sixth parasitic radiator 36 is symmetric with the first radiator 10 about the folding position. Among them, the fifth parasitic radiator 35 is grounded, and the sixth parasitic radiator 36 is not grounded. With such a setting, in the satellite communication mode, the fifth parasitic radiator 35 and the sixth parasitic radiator 36 can be coupled with the magnetic field of the first radiator 10 to improve the performance of the satellite antenna. In the cellular communication mode, the fifth parasitic radiator 35 and the sixth parasitic radiator 36 can also be coupled with the magnetic field of the second radiator 20 to improve the performance of the cellular antenna. In addition, in the folded state, the fifth parasitic radiator 35 is opposite to the second radiator 20, and the sixth parasitic radiator 36 is opposite to the first radiator 10, further realizing the reconstruction of the satellite antenna and the cellular antenna.

[0039] In one embodiment, the antenna 100 further includes a sixth tuning circuit T23 and a seventh tuning circuit T24. One end of the sixth tuning circuit T23 is connected to the fifth parasitic radiator 35, and the other end of the sixth tuning circuit T23 is grounded. One end of the seventh tuning circuit T24 is connected to the sixth parasitic radiator 36, and the other end of the seventh tuning circuit T24 is grounded. The sixth tuning circuit T23 is used to enhance or weaken the current of the fifth parasitic radiator 35, and the seventh tuning circuit T24 is used to enhance or weaken the current of the sixth parasitic radiator 36, for adjusting the radiation direction of the antenna 100.

[0040] As Figure 1 shown, in the deployed state and the satellite communication mode, the first tuning circuit T11, the second tuning circuit T12, and the second tuning circuit T13 respectively enhance the currents of the first radiator 10, the first parasitic radiator 31, and the second parasitic radiator 32. The fourth tuning circuit T21, the fifth tuning circuit T22, the sixth tuning circuit T23, and the seventh tuning circuit T24 respectively suppress the currents of the third parasitic radiator 33, the fourth parasitic radiator 34, the fifth parasitic radiator 35, and the sixth parasitic radiator 36, so that the maximum radiation direction of the satellite antenna can be closer to the center position at the top of the foldable device 200, making it more accurate and convenient to point to the satellite.

[0041] In the deployed state and in the cellular communication mode, the cellular radio frequency port is connected to the second radiator 20 through the second matching circuit M2. Through the second matching circuit M2, the tuning of different frequency bands for cellular communication can be achieved. In this mode, the first radiator 10 can act as a parasitic radiator and achieve electromagnetic coupling with the second radiator 20. At this time, the first matching circuit M1 acts as a tuning circuit and is tuned to the vicinity of the frequency of cellular communication to improve the performance of the cellular antenna.

[0042] As Figure 2 shown, in the folded state and in the satellite communication mode, the satellite antenna is reconstructed. The first adjustment circuit T11 is used for tuning to strengthen the electromagnetic field of the first radiator 10 and serves as a strongly coupled parasitic branch on the left side of the first radiator 10. The second radiator 20 serves as a strongly coupled parasitic branch on the right side of the first radiator 10. The fifth parasitic radiator 35 and the sixth parasitic radiator 36 are located on the opposite side of the first radiator 10 and, due to the change in the position distance, serve as strongly coupled parasitic branches on the opposite side of the first radiator 10. The frequencies of the first radiator 10, the second radiator 20, the fifth parasitic radiator 35, and the sixth parasitic radiator 36 are adjusted to the vicinity of the satellite operating frequency, and the four parasitic radiators interact with each other to achieve the best satellite antenna performance in the closed state. At the same time, the tuning circuits of the first parasitic radiator 31, the second parasitic radiator 32, the third parasitic radiator 33, and the fourth parasitic radiator 34 can also be adjusted to the vicinity of the cellular network frequency to finely adjust the satellite radiation pattern.

[0043] In the folded state and in the cellular communication mode, the first radiator 10 is used to strengthen electromagnetic coupling and is adjusted to the vicinity of the cellular network frequency through the first matching circuit M1 to improve the performance of the cellular antenna. At the same time, the fifth parasitic radiator 35 and the sixth parasitic radiator 36 respectively strengthen electromagnetic coupling with the second radiator 20 and are adjusted to the vicinity of the cellular network frequency to further improve the performance of the cellular antenna.

[0044] The antenna 100 provided in this application is compatible with satellite communication and terrestrial cellular communication in terms of functions and frequency bands. In terms of layout, it ensures that the overall radiation pattern points to the top. In terms of performance, it meets the performance requirements of the satellite side for ground terminals, and the overall antenna solution can be regarded as a dual-port antenna system.

[0045] Please refer to Figure 3 , Figure 3 which is a schematic diagram of the first tuning circuit T11 shown in an exemplary embodiment of this application.

[0046] The first tuning circuit T11 includes a switch, a resistor R, a capacitor C, and inductors L1 and L2. The switch can selectively ground through one of the resistor R, the capacitor C, and the inductors L1 and L2 according to a signal to strengthen or suppress the current of the first radiator 10. Among them, the second tuning circuit T12, the third tuning circuit T13, the fourth tuning circuit T21, the fifth tuning circuit T22, the sixth tuning circuit T23, and the seventh tuning circuit T24 can all be set with reference to the first tuning circuit T11, which will not be elaborated here.

[0047] This application also provides a foldable device 200, which includes, but is not limited to, a mobile phone, a tablet computer, a wearable device, etc. The foldable device 200 includes the antenna 100 described above. The antenna 100 is hidden in the overall structure of the foldable device 200.

[0048] The above are only the preferred embodiments of this application and are not intended to limit this application. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of this application shall be included within the scope of protection of this application.

Claims

1. An antenna for a foldable device, the foldable device comprising a main body side and a folding side that can be folded and unfolded relative to each other, characterized in that: The antenna includes a first radiator, a second radiator and a plurality of parasitic radiators integrated into a first frame on the main body side and a second frame on the folding side. The first radiator is provided with a first feeding point, The second radiator is provided with a second feeding point, Among the plurality of parasitic radiators, at least one is integrated into the first frame, and at least one is integrated into the second frame.

2. The antenna according to claim 1, characterized in that The first radiator and the second radiator are integrated into the first frame and are adjacently arranged on the top of the first frame. The first radiator and the second radiator are closer to the second frame than the parasitic radiator integrated into the first frame.

3. The antenna according to claim 2, characterized in that: The antenna further comprises a first tuning circuit, One end of the first tuning circuit is connected to the first radiator, and the other end of the first tuning circuit is grounded.

4. The antenna according to claim 1, characterized in that: The plurality of parasitic radiators include a first parasitic radiator and a second parasitic radiator integrated into the first frame, The first parasitic radiator is located on the top of the first frame, The second parasitic radiator is located at a top end of a side portion of the first frame away from the second frame.

5. The antenna according to claim 4, characterized in that: The antenna further includes a second tuning circuit and a third tuning circuit, One end of the second tuning circuit is connected to the first parasitic radiator, and the other end of the second tuning circuit is grounded. One end of the third tuning circuit is connected to the second parasitic radiator, and the other end of the third tuning circuit is grounded.

6. The antenna according to claim 4, characterized in that: The plurality of parasitic radiators further include a third parasitic radiator and a fourth parasitic radiator integrated into the second frame, The third parasitic radiator is located on the top of the second frame and is symmetrical with the first parasitic radiator about the folding position. The fourth parasitic radiator is located at a top end of a side portion of the second frame away from the second frame, and is symmetrical to the second parasitic radiator about the folding position.

7. The antenna according to claim 6, characterized in that The antenna further includes a fourth tuning circuit and a fifth tuning circuit, One end of the fourth tuning circuit is connected to the third parasitic radiator, and the other end of the fourth tuning circuit is grounded. One end of the fifth tuning circuit is connected to the fourth parasitic radiator, and the other end of the fifth tuning circuit is grounded.

8. The antenna according to claim 1, characterized in that: The multiple parasitic radiators also include a fifth parasitic radiator and a sixth parasitic radiator integrated into the second frame, the fifth parasitic radiator and the sixth parasitic radiator are located on the top of the second frame, the fifth parasitic radiator and the second radiator are symmetrical about the folding position, and the sixth parasitic radiator and the first radiator are symmetrical about the folding position.

9. The antenna according to claim 8, characterized in that The antenna also includes a sixth tuning circuit and a seventh tuning circuit, one end of the sixth tuning circuit is connected to the fifth parasitic radiator, the other end of the sixth tuning circuit is grounded, one end of the seventh tuning circuit is connected to the sixth parasitic radiator, the other end of the seventh tuning circuit is grounded.

10. A foldable device, characterized in that: include: The main body side includes a first frame; a folding side, including a second border; and The antenna according to any one of claims 1 to 9, wherein the antenna is integrated with the first frame and the second frame.

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