Electronic device

Abstract

The invention relates to an electronic device. The electronic equipment comprises a first main body part, a second main body part and a grounding plate, the first main body part is provided with an antenna radiator, the antenna radiator is provided with a feeding point and a first grounding point, and the second main body part is provided with a first parasitic branch knot and a first tuning circuit; the feed source feeds a feed signal into the antenna radiator through the feed point, and the antenna radiator is coupled with the first parasitic branch knot through the grounding plate, so that the antenna radiator and the first parasitic branch knot support a target frequency band; and the first tuning circuit is used for being in conduction connection with the first parasitic branch knot under the condition that the second main body part is in an unfolded state relative to the first main body part to change the resonance current distribution of the grounding plate so as to enhance the circular polarization gain of a target frequency band supported by the antenna radiator. According to the electronic equipment, the antenna performance of the foldable electronic equipment in the unfolded state can be improved.

Description

Technical Field

[0001] The present application relates to the technical field of antennas, and particularly to an electronic device. Background Art

[0002] With the trend of the development of electronic devices towards large screens, the market share of foldable electronic devices is increasing. As an important part of foldable electronic devices for communication, the antenna can support the transceiver of various types of signals, such as supporting the transceiver of satellite signals, to meet diverse communication needs. And how to improve the antenna performance of foldable electronic devices has become a current research hotspot.

[0003] The related technology mainly focuses on improving the antenna performance of foldable electronic devices in the folded state. However, when users use foldable electronic devices, the foldable electronic devices are usually in the unfolded state. Therefore, how to improve the antenna performance of foldable electronic devices in the unfolded state is of great significance. Summary of the Invention

[0004] Based on this, it is necessary to provide an electronic device that can improve the antenna performance of a foldable electronic device in the unfolded state.

[0005] The present application provides an electronic device, including:

[0006] A first main body portion, on which an antenna radiator is provided. The antenna radiator is provided with a feeding point and a first grounding point, and the feeding point is used to connect to a feed source;

[0007] A ground plane, and the first grounding point is connected to the ground plane;

[0008] A second main body portion, which can be in a folded state or an unfolded state relative to the first main body portion. The second main body portion is provided with a first parasitic stub and a first tuning circuit. The first end of the first tuning circuit is selectively conductively connected to the first parasitic stub, and the second end of the first tuning circuit is connected to the ground plane; wherein,

[0009] The feed source feeds a feeding signal into the antenna radiator through the feeding point, and the antenna radiator is coupled to the first parasitic stub through the ground plane, so that the antenna radiator and the first parasitic stub support a target frequency band;

[0010] The first tuning circuit is used to conductively connect to the first parasitic stub when the second main body portion is in an unfolded state relative to the first main body portion, and change the resonant current distribution of the ground plane to enhance the circular polarization gain of the antenna radiator supporting the target frequency band.

[0011] The above-mentioned electronic device includes a first main body, a second main body, and a ground plane. The second main body can be in a folded state or an unfolded state relative to the first main body, that is, the electronic device is a foldable electronic device. An antenna radiator is provided on the first main body, and a feeding point and a first grounding point are provided on the antenna radiator. The feeding point is used to connect to a feed source, and the first grounding point is connected to the ground plane; the second main body is provided with a first parasitic stub and a first tuning circuit. The first end of the first tuning circuit is selectively conductively connected to the first parasitic stub, and the second end of the first tuning circuit is connected to the ground plane; wherein, the feed source feeds a feeding signal into the antenna radiator through the feeding point, and the antenna radiator and the first parasitic stub are coupled through the ground plane, so that the antenna radiator and the first parasitic stub support a target frequency band; and when the second main body is in an unfolded state relative to the first main body, the first tuning circuit is conductively connected to the first parasitic stub, which can change the resonant current distribution of the ground plane in the electronic device when the antenna radiator operates in the target frequency band. Changing the resonant current distribution of the ground plane when the antenna radiator operates in the target frequency band can enhance the directivity of the current antenna radiator, thereby enhancing the circular polarization gain of the antenna radiator supporting the target frequency band. In the embodiment of the present application, when the second main body is in an unfolded state relative to the first main body, the antenna performance of the antenna radiator supporting the target frequency band can be enhanced, thereby improving the overall antenna performance of the electronic device. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present application. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0013] Figure 1 Schematic diagram of the structure of the electronic device in the unfolded state in an embodiment of the present application;

[0014] Figure 2 Schematic diagram of the structure of the electronic device in the folded state in an embodiment of the present application;

[0015] Figure 3 Schematic diagram of the structure of the electronic device in the unfolded state in another embodiment of the present application;

[0016] Figure 4 Schematic diagram of the structure of the electronic device in the unfolded state in another embodiment of the present application;

[0017] Figure 5 Schematic diagram of the structure of the electronic device in the unfolded state in another embodiment of the present application;

[0018] Figure 6Schematic diagram of the electronic device in the unfolded state in another embodiment of the present application;

[0019] Figure 7 Schematic diagram of the electronic device in the unfolded state in another embodiment of the present application;

[0020] Figure 8 Schematic circuit diagram of the third switch circuit in another embodiment of the present application;

[0021] Figure 9 Schematic circuit diagram of the third switch circuit in another embodiment of the present application;

[0022] Figure 10 Schematic diagram of the antenna combination of the electronic device when the second main body is in the unfolded state relative to the first main body in another embodiment of the present application;

[0023] Figure 11 Schematic diagram of the antenna combination of the electronic device when the second main body is in the folded state relative to the first main body in another embodiment of the present application;

[0024] Figure 12 Schematic diagram of the antenna combination of the electronic device when the second main body is in the unfolded state relative to the first main body in another embodiment of the present application;

[0025] Figure 13 Schematic diagram of the antenna combination of the electronic device when the second main body is in the folded state relative to the first main body in another embodiment of the present application;

[0026] Figure 14 Schematic diagram of the antenna combination of the electronic device when the second main body is in the unfolded state relative to the first main body in another embodiment of the present application;

[0027] Figure 15 Schematic diagram of the antenna combination of the electronic device when the second main body is in the folded state relative to the first main body in another embodiment of the present application;

[0028] Figure 16 Schematic diagram of the antenna combination of the electronic device when the second main body is in the unfolded state relative to the first main body in another embodiment of the present application;

[0029] Figure 17 Schematic diagram of the antenna combination of the electronic device when the second main body is in the folded state relative to the first main body in another embodiment of the present application;

[0030] Figure 18a Current distribution vector diagram when the antenna radiator operates in the target frequency band without using the first parasitic stub when the second main body is in the unfolded state relative to the first main body;

[0031] Figure 18b In another embodiment of the present application, when the second main body is in an unfolded state relative to the first main body, the current distribution vector diagram of the antenna radiator when the second main body uses the HG branch as the first parasitic branch and the antenna radiator operates in the target frequency band;

[0032] Figure 19a When the second main body is in an unfolded state relative to the first main body and the second main body does not use the first parasitic branch, the LHCP pattern of the antenna radiator when the antenna radiator operates in the target frequency band;

[0033] Figure 19b In another embodiment of the present application, when the second main body is in an unfolded state relative to the first main body and the second main body uses the HG branch as the first parasitic branch, the LHCP pattern of the antenna radiator when the antenna radiator operates in the target frequency band;

[0034] Figure 20 For Figure 15 Schematic diagram of the current directions in the antenna radiator and the target first parasitic branch in the illustrated embodiment;

[0035] Figure 21 In another embodiment of the present application, when the second main body is in a folded state relative to the first main body, the schematic diagram of the S parameters of the antenna radiator;

[0036] Figure 22 In another embodiment of the present application, when the second main body is in a folded state relative to the first main body, the comparison diagram of the antenna efficiency of the antenna radiator when the first parasitic branch is not used and when the first parasitic branch is used and the antenna radiator operates in the target frequency band;

[0037] Figure 23 In another embodiment of the present application, when the second main body is in an unfolded state relative to the first main body, the schematic diagram of the antenna combination of the electronic device;

[0038] Figure 24 In another embodiment of the present application, when the second main body is in a folded state relative to the first main body, the schematic diagram of the antenna combination of the electronic device;

[0039] Figure 25 In another embodiment of the present application, the schematic diagram of the structure of the electronic device in the unfolded state;

[0040] Figure 26 In another embodiment of the present application, when the second main body is in an unfolded state relative to the first main body, the schematic diagram of the antenna combination of the electronic device;

[0041] Figure 27 In another embodiment of the present application, when the second main body is in a folded state relative to the first main body, the schematic diagram of the antenna combination of the electronic device;

[0042] Figure 28aSchematic diagram of the S-parameters of the antenna radiator when the antenna radiator and the second parasitic stub radiate together in the case where the second main body portion is in a folded state relative to the first main body portion;

[0043] Figure 28b Schematic diagram of the S-parameters of the antenna radiator when the antenna radiator and the second parasitic stub radiate together and the target first parasitic stub 1 is used in another embodiment of the present application in the case where the second main body portion is in a folded state relative to the first main body portion;

[0044] Figure 29 Schematic diagram of the antenna combination of the electronic device when the second main body portion is in an unfolded state relative to the first main body portion in another embodiment of the present application;

[0045] Figure 30 Schematic diagram of the antenna combination of the electronic device when the second main body portion is in a folded state relative to the first main body portion in another embodiment of the present application;

[0046] Figure 31 Schematic diagram of the antenna combination of the electronic device when the second main body portion is in an unfolded state relative to the first main body portion in another embodiment of the present application;

[0047] Figure 32 Schematic diagram of the antenna combination of the electronic device when the second main body portion is in a folded state relative to the first main body portion in another embodiment of the present application;

[0048] Figure 33 Schematic diagram of the circuit of two combinations of capacitance and inductance circuits in another embodiment of the present application;

[0049] Figure 34 Schematic diagram of an antenna using parasitic enhancement of the secondary screen in an exemplary manner when in a folded state.

[0050] Description of reference numerals:

[0051] 100 - Electronic device, 10 - First main body portion, 101 - Feed source, 102 - Antenna radiator, 103 - Second parasitic stub, 104 - First top sub-frame, 105 - First side sub-frame, 106 - First bottom sub-frame, 11 - Second main body portion, 111 - First parasitic stub, 111' - Target first parasitic stub, 112 - Other first parasitic stubs, 113 - Second top sub-frame, 114 - Second side sub-frame, 115 - Second bottom sub-frame, 12 - Rotating shaft. Detailed description of the invention

[0052] To facilitate the understanding of the present application, the present application will be described more comprehensively below with reference to the relevant drawings. Embodiments of the present application are shown in the drawings. However, the present application can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, these embodiments are provided to make the disclosure of the present application more thorough and comprehensive. Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the technical field to which the present application belongs. The terms used in the specification of the present application herein are only for the purpose of describing specific embodiments and are not intended to limit the present application.

[0053] It can be understood that the terms "first", "second", etc. used in the present application may be used herein to describe various elements, but these elements are not limited by these terms. These terms are only used to distinguish a first element from another element. For example, without departing from the scope of the present application, the first resistor may be referred to as the second resistor, and similarly, the second resistor may be referred to as the first resistor. Both the first resistor and the second resistor are resistors, but they are not the same resistor.

[0054] It can be understood that for "connection" in the following embodiments, if there is an electrical signal or data transfer between the connected circuits, modules, units, etc., it should be understood as "electrical connection", "communication connection", etc.

[0055] It can be understood that "at least one" means one or more, and "a plurality" means two or more. "At least part of an element" means part or all of the element.

[0056] As used herein, the singular forms "a", "an" and "the" may also include the plural forms unless the context clearly dictates otherwise. It should also be understood that the terms "comprise / include" or "have", etc. specify the presence of the stated features, wholes, steps, operations, components, parts, or combinations thereof, but do not preclude the possibility of the presence or addition of one or more other features, wholes, steps, operations, components, parts, or combinations thereof.

[0057] With the trend of the development of electronic devices towards large screens, the market share of foldable electronic devices is increasing. As an important part of foldable electronic devices for communication, the antenna can support the transceiver of various types of signals. In addition to supporting the transceiver of cellular signals, with the increasing attention paid to satellite communication technology, more and more foldable electronic devices also support satellite communication technology, that is, support the transceiver of satellite signals to meet diverse communication needs. The satellite signals in the satellite communication process usually use circular polarization transmission.

[0058] At present, users have higher and higher requirements for the communication performance of electronic devices. How to improve the antenna performance of foldable electronic devices has become a hot topic in current research. In related technologies, the main research focuses on improving the antenna performance of foldable electronic devices in the folded state. For example, for foldable electronic devices, some technologies attempt to reduce the influence of the metal middle frame on the antenna radiation performance to improve the antenna performance in the folded state. However, when users use foldable electronic devices, the foldable electronic devices are usually in the unfolded state. Therefore, how to improve the antenna performance of foldable electronic devices in the unfolded state is of great significance.

[0059] To solve the above problems, the present application provides an electronic device. The electronic device in the embodiments of the present application can be a mobile phone, a tablet computer, a desktop computer, a laptop computer, an e-reader, a handheld computer, an electronic display screen, a notebook computer, an ultra-mobile personal computer (UMPC), a netbook, and foldable devices such as cellular phones, personal digital assistants (PDAs), augmented reality (AR) / virtual reality (VR) devices, media players, and smart wearable devices. It can be understood that the electronic device can be a foldable display device or a foldable non-display device. In the present application, a foldable mobile phone is taken as an example of the electronic device, and other devices can refer to the specific description in the present application.

[0060] The electronic device in the embodiments of the present application includes a first main body part and a second main body part. The first main body part and the second main body part are the main structures of the electronic device, and the combined form of the first main body part and the second main body part is consistent with the form of the electronic device.

[0061] See Figure 1 and Figure 2 , Figure 1 FIG. is a schematic structural diagram of an exemplary electronic device 100 in the unfolded state. Figure 2 FIG. is a schematic structural diagram of an exemplary electronic device 100 in the folded state. In the embodiments of the present application, the second main body part 11 can be in a folded state or an unfolded state relative to the first main body part 10, that is, the first main body part 10 and the second main body part 11 can form a folding structure of the electronic device 100.

[0062] In a possible implementation, the second main body portion 11 can be in a folded state relative to the first main body portion 10, which can refer to the state when the included angle between the first main body portion 10 and the second main body portion 11 is less than or equal to a first threshold. The first threshold can be a relatively small angular value between 0° and 180°, and the first threshold can be less than 90°. For example, the first threshold can be 10°, 5°, or can also be 0°, etc.

[0063] The second main body portion 11 can be in an unfolded state relative to the first main body portion 10, which can refer to the state when the included angle between the first main body portion 10 and the second main body portion 11 is greater than or equal to a second threshold. The second threshold is greater than the above-mentioned first threshold. The second threshold can be a relatively large angular value between 0° and 180°, and the second threshold can be greater than 90°. For example, the second threshold can be 170°, 175°, or can also be 180°, etc.

[0064] In another possible implementation, only one third threshold can be set. The third threshold can be, for example, 90°. When the included angle between the first main body portion 10 and the second main body portion 11 is less than the third threshold, it indicates that the second main body portion 11 is in a folded state relative to the first main body portion 10. Conversely, if the included angle between the first main body portion 10 and the second main body portion 11 is greater than or equal to the third threshold, it indicates that the second main body portion 11 is in an unfolded state relative to the first main body portion 10. Optionally, the state where the included angle between the first main body portion 10 and the second main body portion 11 is equal to the third threshold can also be classified as the second main body portion 11 being in a folded state relative to the first main body portion 10, and no specific limitation is made here.

[0065] Optionally, the electronic device 100 can further include one or more other main body portions (such as further including a third main body portion, etc.). The first main body portion 10, the second main body portion 11, and the other main body portions form a multi-fold folding structure. Hereinafter, the electronic device 100 with a double-fold structure is taken as an example for illustration. The electronic device 100 in the embodiment of the present application further includes a ground plane, and the ground plane can be implemented by the main board, small board, or middle board of the electronic device 100.

[0066] An antenna radiator 102 is provided on the first main body portion 10. The antenna radiator 102 is provided with a feeding point (such as Figure 1 S1 shown) and a first grounding point ( Figure 1 not shown). The feeding point is used to connect to the feed source 101. Exemplarily, the feeding point can be set at the center position of the antenna radiator 102.

[0067] The feed source 101 can be arranged on the first main body portion 10 as shown in Figure 1 . Optionally, the feed source 101 can also be arranged at other positions in the electronic device 100, and no limitation is made on the setting position of the feed source 101 in the electronic device 100 here.

[0068] One end of the antenna radiator 102 is connected to the ground plane through the first grounding point, and the antenna radiator 102 is connected to the feed source 101 through the feeding point. Among them, the feed source 101 includes, but is not limited to, a radio frequency transceiver chip and a radio frequency front-end circuit. In this way, during the communication of the electronic device 100, the antenna radiator 102 can transmit and receive radio frequency signals, and the radio frequency signals include, for example, satellite signals.

[0069] The second main body 11 is provided with a first parasitic stub 111 and a first tuning circuit (such as Figure 1 T1 shown), the first end of the first tuning circuit is selectively conductively connected to the first parasitic stub 111, and the second end of the first tuning circuit is connected to the ground plane to be grounded.

[0070] Among them, one end of the first parasitic stub 111 is connected to the ground plane, and a grounding point (such as Figure 1 G1 shown) is also provided on the first parasitic stub 111. The grounding point is used to be connected to the first end of the first tuning circuit, so that the first tuning circuit can be selectively conductively connected to the first parasitic stub 111. The first tuning circuit may include a capacitor and / or an inductor.

[0071] The "selective" conductive connection mentioned here means that the first tuning circuit can be conductively connected to the first parasitic stub 111, and the first tuning circuit can also be disconnected from the first parasitic stub 111. The conduction connection and disconnection process of the first tuning circuit and the first parasitic stub 111 will be described in the following embodiments.

[0072] In the embodiments of the present application, the shape of the antenna radiator 102 and the shape of the first parasitic stub 111 may be straight bars (such as Figure 1 shown), or may be bent. The shape of the antenna radiator 102 and the shape of the first parasitic stub 111 are not specifically limited herein.

[0073] It should be noted that Figure 1 the antenna radiator 102 and the first parasitic stub 111 shown are only one example, and cannot limit the shapes of the antenna radiator 102 and the first parasitic stub 111 provided in the embodiments of the present application.

[0074] The following introduces the installation positions of the antenna radiator 102 and the first parasitic stub 111.

[0075] In the embodiments of the present application, when the second main body 11 is in a folded state relative to the first main body 10, the antenna radiator 102 is close to the first parasitic stub 111, so that the antenna radiator 102 is coupled to the first parasitic stub 111, and the coupling mainly includes spatial coupling.

[0076] The following is an exemplary description of the installation positions of the antenna radiator 102 and the first parasitic branch 111 in the embodiments of the present application in conjunction with the accompanying drawings.

[0077] Please refer to Figures 3 - 5 , Figures 3 - 5 which are respectively schematic structural diagrams of an exemplary electronic device 100 in an unfolded state. Figures 3 - 5 The difference lies in the different installation positions of the antenna radiator 102 and the first parasitic branch 111.

[0078] As Figures 3 - 5 shown in any one of them, the electronic device 100 further includes a rotating shaft 12. The first main body 10 includes a first top sub-frame 104, a first side sub-frame 105, and a first bottom sub-frame 106 connected in sequence. The second main body 11 includes a second top sub-frame 113, a second side sub-frame 114, and a second bottom sub-frame 115 connected in sequence. Among them, the first end of the rotating shaft 12 is respectively connected to the first top sub-frame 104 and the second top sub-frame 113, and the second end of the rotating shaft 12 is respectively connected to the first bottom sub-frame 106 and the second bottom sub-frame 115.

[0079] In a possible installation method of the antenna radiator 102 and the first parasitic branch 111, as Figure 3 shown, the antenna radiator 102 is installed on the first top sub-frame 104, and the first parasitic branch 111 is installed on the second top sub-frame 113.

[0080] In another possible installation method of the antenna radiator 102 and the first parasitic branch 111, as Figure 4 shown, the antenna radiator 102 is installed on the first side sub-frame 105, and the first parasitic branch 111 is installed on the second side sub-frame 114.

[0081] In yet another possible installation method of the antenna radiator 102 and the first parasitic branch 111, as Figure 5 shown, the antenna radiator 102 is installed on the first bottom sub-frame 106, and the first parasitic branch 111 is installed on the second bottom sub-frame 115.

[0082] Figures 3 - 5 All are described by taking the antenna radiator 102 and the first parasitic branch 111 installed on the frame of the electronic device 100 as an example. Optionally, the antenna radiator 102 can also be installed on the back cover of the first main body 10, and the first parasitic branch 111 is installed on the back cover of the second main body 11.

[0083] Regarding the forms of the antenna radiator 102 and the first parasitic branch 111, optionally, the above Figures 3 - 5Any of the shown first top sub-frame 104, first side sub-frame 105, first bottom sub-frame 106, second top sub-frame 113, second side sub-frame 114, and second bottom sub-frame 115 can be a conductive sub-frame, and the antenna radiator 102 and the first parasitic stub 111 can be formed by making slits in the conductive sub-frame.

[0084] Optionally, the first top sub-frame 104, first side sub-frame 105, first bottom sub-frame 106, second top sub-frame 113, second side sub-frame 114, and second bottom sub-frame 115 can also be insulating frames, such as plastic frames. The antenna radiator 102 and the first parasitic stub 111 can also be implemented by attaching an FPC (Flexible Printed Circuit) to the insulating frame, or by making LDS (Laser Direct Structuring) metal stubs in the insulating frame, etc. The forms of the antenna radiator 102 and the first parasitic stub 111 are not limited herein.

[0085] In this way, the setting positions and forms of the antenna radiator 102 and the first parasitic stub 111 in the embodiments of the present application have relatively high flexibility and can be set as required during implementation.

[0086] In the embodiments of the present application, Figures 3 - 5 In any of the shown embodiments, when the second main body portion 11 is in a folded state relative to the first main body portion 10, the projection of the antenna radiator 102 in the thickness direction of the electronic device 100 and the projection of the first parasitic stub 111 in the thickness direction at least partially overlap. At least partially overlapping means that the projection of the antenna radiator 102 in the thickness direction of the electronic device 100 and the projection of the first parasitic stub 111 in the thickness direction at least overlap a part, and of course, they can also completely overlap.

[0087] In other possible implementation manners, when the second main body portion 11 is in a folded state relative to the first main body portion 10, the projection of the antenna radiator 102 in the thickness direction of the electronic device 100 and the projection of the first parasitic stub 111 in the thickness direction may not overlap either. For example, the antenna radiator 102 is disposed on the top of the first main body portion 10 (projecting above the top), and the first parasitic stub 111 is disposed on the top of the second main body portion 11 (projecting above the top). At this time, the projection of the antenna radiator 102 in the thickness direction of the electronic device 100 and the projection of the first parasitic stub 111 in the thickness direction do not overlap.

[0088] The embodiments of the present application do not specifically limit the setting position and form of the antenna radiator 102 on the first main body portion 10, and the setting position and form of the first parasitic stub 111 on the second main body portion 11.

[0089] It should be noted that in the embodiments of the present application, the number of the first parasitic stubs 111 can be one or more. When the number of the first parasitic stubs 111 is more than one, the first parasitic stubs 111 are sequentially arranged on the second top sub-frame 113 (or on the second side sub-frame 114 / second bottom sub-frame 115), and there is a gap between two adjacent first parasitic stubs 111. The two first parasitic stubs 111 can be capacitively coupled through the gap. The implementation manners of multiple first parasitic stubs 111 will be described in the following embodiments. Figures 1 - 5 All are examples with the number of the first parasitic stubs 111 being one. However, Figures 1 - 5 it does not constitute a limitation on the number of the first parasitic stubs 111 in the embodiments of the present application, nor does it constitute a limitation on the setting position of the first parasitic stubs 111.

[0090] In the embodiments of the present application, in addition to arranging the antenna radiator 102, the first main body 10 can also be provided with a second parasitic stub 103. The second parasitic stub 103 and the antenna radiator 102 are sequentially arranged on the second top sub-frame 113 (or the second side sub-frame 114 / second bottom sub-frame 115). There is a gap between the second parasitic stub 103 and the antenna radiator 102. The implementation manners of the second parasitic stub 103 will also be described in the following embodiments. Figures 1 - 5 All are examples with the first main body 10 only including the antenna radiator 102. However, Figures 1 - 5 it does not constitute a limitation on whether the first main body 10 in the embodiments of the present application includes parasitic stubs, nor does it constitute a limitation on the setting position of the antenna radiator 102.

[0091] Please continue to refer to Figure 1 , in the embodiments of the present application, when the second main body 11 is in a folded state or an unfolded state relative to the first main body 10, the feed source 101 can feed a feed signal to the antenna radiator 102 through the feed point on the antenna radiator 102. In this way, the antenna radiator 102 and the first parasitic stub 111 are coupled through a ground plane ( Figure 1 not shown), so that both the antenna radiator 102 and the first parasitic stub 111 support the target frequency band. The target frequency band can be any frequency band using circularly polarized signal transmission. For example, the target frequency band is a satellite communication frequency band. Of course, the target frequency band can also be other frequency bands using circularly polarized signal transmission. Among them, circular polarization is a polarization mode when an electromagnetic wave propagates. Circular polarization transmission can include left-handed circular polarization or right-handed circular polarization. If the polarization plane rotates with time and forms a right-handed spiral relationship with the electromagnetic wave propagation direction, it is right-handed circular polarization. On the contrary, if it forms a left-handed spiral relationship, it is left-handed circular polarization.

[0092] The first tuning circuit is used to conductively connect to the first parasitic stub 111 when the second main body portion 11 is in an unfolded state relative to the first main body portion 10. The first parasitic stub 111 resonates at the resonant frequency adjusted by the first tuning circuit, thereby changing the resonant current distribution of the ground plane in the electronic device 100. The resonant current distribution of the ground plane is the resonant current distribution in the electronic device 100 when the antenna radiator 102 operates in the target frequency band.

[0093] The change in the resonant current distribution of the antenna radiator 102 when it operates in the target frequency band will cause a change in the directivity of the antenna radiator 102. As an implementation manner, during the debugging stage, when the second main body portion 11 is in an unfolded state relative to the first main body portion 10, different tuning circuits can be conductively connected to the first parasitic stub 111, the directivity of the antenna radiator 102 when each tuning circuit is conductively connected to the first parasitic stub 111 is recorded, and a tuning circuit with the largest increase in the directivity of the antenna radiator 102 is determined and used as the first tuning circuit.

[0094] As described above, the first tuning circuit may include a capacitor and / or an inductor. Therefore, determining a tuning circuit with the largest increase in the directivity of the antenna radiator 102 and using this tuning circuit as the first tuning circuit means using the tuning parameters of a tuning circuit with the largest increase in the directivity of the antenna radiator 102 (such as the capacitance value, inductance value, the setting manner of the capacitor and the inductor, etc.) as the tuning parameters of the first tuning circuit.

[0095] In the embodiment of the present application, when the second main body portion 11 is in an unfolded state relative to the first main body portion 10 and the first tuning circuit is conductively connected to the first parasitic stub 111, the difference between the resonant frequency of the first parasitic stub 111 and the center frequency of the above-mentioned target frequency band supported by the antenna radiator 102 is within a preset range. The center frequency refers to the middle frequency in the target frequency band, and this preset range may be, for example, ±0.2 GHz.

[0096] In other possible implementation manners, the highest frequency of the target frequency band may also be used as a reference, and the difference between the resonant frequency of the first parasitic stub 111 and the highest frequency of the above-mentioned target frequency band supported by the antenna radiator 102 is within another preset range.

[0097] In this way, during the debugging phase, according to the center frequency (or the highest frequency) of the target frequency band and the above-mentioned preset range, the approximate resonant frequency range of the first parasitic stub 111 can be determined. Then, within this resonant frequency range, different tuning circuits are tried to be conductively connected to the first parasitic stub 111. Different tuning circuits represent different resonant frequencies of the first parasitic stub 111. The directivity of the antenna radiator 102 when each tuning circuit is conductively connected to the first parasitic stub 111 is recorded, so as to determine the first tuning circuit, which can improve the debugging efficiency.

[0098] In this way, when the second main body 11 is in an unfolded state relative to the first main body 10, when the first tuning circuit is conductively connected to the first parasitic stub 111, the resonant current distribution of the ground plane in the electronic device 100 is changed, thereby improving the directivity of the antenna radiator 102 when the antenna radiator 102 operates in the target frequency band. Since the directivity of the antenna radiator 102 is positively correlated with the circular polarization gain of the antenna radiator 102, the circular polarization gain of the antenna radiator 102 supporting the target frequency band is enhanced.

[0099] In one embodiment, based on the above Figure 1 and Figure 2 the embodiment shown, refer to Figure 6 , the second main body 11 of the electronic device 100 in this embodiment is further provided with a second tuning circuit (such as Figure 6 T2 shown), the first end of the second tuning circuit is selectively conductively connected to the first parasitic stub 111, and the second end of the second tuning circuit is connected to the ground plane.

[0100] The second tuning circuit can also include a capacitor and / or an inductor. As described above, the first parasitic stub 111 is provided with a grounding point (such as Figure 6 G1 shown), and this grounding point is used to connect to the first end of the first tuning circuit (such as Figure 6 T1 shown), or this grounding point is also used to connect to the first end of the second tuning circuit.

[0101] When the second main body 11 is in an unfolded state relative to the first main body 10, this grounding point is connected to the first end of the first tuning circuit, so that the first tuning circuit is conductively connected to the first parasitic stub 111, and the second tuning circuit is used to be disconnected from the first parasitic stub 111 when the second main body 11 is in an unfolded state relative to the first main body 10.

[0102] When the second main body portion 11 is in a folded state relative to the first main body portion 10, the grounding point is connected to the first end of the second tuning circuit, so that the second tuning circuit is conductively connected to the first parasitic stub 111. The first tuning circuit is further configured to be disconnected from the first parasitic stub 111 when the second main body portion 11 is in a folded state relative to the first main body portion 10.

[0103] When the second main body portion 11 is in a folded state relative to the first main body portion 10, the second tuning circuit is conductively connected to the first parasitic stub 111. The first parasitic stub 111 resonates at a resonance frequency adjusted by the second tuning circuit, and the resonance frequency of the first parasitic stub 111 is greater than the center frequency of the target frequency band supported by the antenna radiator 102.

[0104] In other possible embodiments, while the resonance frequency of the first parasitic stub 111 is greater than the center frequency of the target frequency band supported by the antenna radiator 102, the resonance frequency of the first parasitic stub 111 may also be less than the highest frequency of the target frequency band (i.e., the resonance frequency of the first parasitic stub 111 falls within the frequency range of the target frequency band); optionally, the resonance frequency of the first parasitic stub 111 may also be greater than the highest frequency of the target frequency band supported by the antenna radiator 102.

[0105] Thus, through the above-mentioned limiting relationship between the resonance frequency of the first parasitic stub 111 and the center frequency and / or the highest frequency of the target frequency band supported by the antenna radiator 102, when the second main body portion 11 is in a folded state relative to the first main body portion 10 and the second tuning circuit is conductively connected to the first parasitic stub 111, the current direction of the antenna radiator 102 is the same as the current direction of the first parasitic stub 111. The same current direction of the two can enhance the radiation ability of the antenna radiator 102. Therefore, when the second main body portion 11 is in a folded state relative to the first main body portion 10, the antenna efficiency of the antenna radiator 102 can be improved. Since the antenna efficiency of the antenna radiator 102 is positively correlated with the circular polarization gain of the antenna radiator 102, the circular polarization gain of the target frequency band supported by the antenna radiator 102 is enhanced.

[0106] It should be noted that when the second main body portion 11 is in a folded state relative to the first main body portion 10, the antenna efficiency of the antenna radiator 102 is improved in the embodiments of the present application. Therefore, if the target frequency band is other frequency bands, such as a frequency band for transmitting linearly polarized signals, the embodiments of the present application can also improve the antenna gain of the antenna radiator 102 supporting the target frequency band.

[0107] The determination of the second tuning circuit is similar to that of the first tuning circuit described above. During the debugging phase, when the second main body portion 11 is in a folded state relative to the first main body portion 10, different tuning circuits can be conductively connected to the first parasitic stub 111. Record the antenna efficiency of the antenna radiator 102 when each tuning circuit is conductively connected to the first parasitic stub 111, and determine a tuning circuit with the largest increase in the antenna efficiency of the antenna radiator 102. This tuning circuit is used as the second tuning circuit. Specifically, the tuning parameters of a tuning circuit with the largest increase in the antenna efficiency of the antenna radiator 102 (such as the capacitance value, inductance value, and the setting method of the capacitance and inductance) can be used as the tuning parameters of the second tuning circuit.

[0108] In addition, as described above, the resonance frequency of the first parasitic stub 111 can be greater than the center frequency of the target frequency band supported by the antenna radiator 102. During the debugging phase, based on this center frequency, the frequency can be gradually increased as the resonance frequency of the first parasitic stub 111. For example, if the resonance frequency of the antenna radiator 102 is 2 GHz, the resonance frequency of the first parasitic stub 111 can be tried at 2.05 GHz or 2.1 GHz. Then, within this resonance frequency range, try to conductively connect different tuning circuits to the first parasitic stub 111. Different tuning circuits represent different resonance frequencies of the first parasitic stub 111. Record the antenna efficiency of the antenna radiator 102 when each tuning circuit is conductively connected to the first parasitic stub 111, so as to determine the second tuning circuit.

[0109] It should be noted that in the embodiments of the present application, the first main body portion 10 can be the main screen structure of the electronic device 100, and the second main body portion 11 can be the secondary screen structure of the electronic device 100. Or, the first main body portion 10 can be the secondary screen structure of the electronic device 100, and the second main body portion 11 can be the main screen structure of the electronic device 100. Here, the distinction between the main and secondary screens of the first main body portion 10 and the second main body portion 11 is not limited.

[0110] In the above embodiments, by providing the first parasitic stub 111, the first tuning circuit, and the second tuning circuit in the second main body 11, when the second main body 11 is in the unfolded state relative to the first main body 10, the first tuning circuit is conducted with the first parasitic stub 111 to change the resonant current distribution of the ground plane in the electronic device 100, thereby improving the directivity of the antenna radiator 102 when the antenna radiator 102 operates in the target frequency band, and further enhancing the circular polarization gain of the antenna radiator 102 supporting the target frequency band; when the second main body 11 is in the folded state relative to the first main body 10, the second tuning circuit is conducted with the first parasitic stub 111. The resonant frequency of the first parasitic stub 111 is greater than the center frequency of the target frequency band supported by the antenna radiator 102, so that the current direction of the antenna radiator 102 is the same as the current direction of the first parasitic stub 111, which can improve the antenna efficiency of the antenna radiator 102, and further enhance the circular polarization gain of the antenna radiator 102 supporting the target frequency band.

[0111] Overall, in the embodiments of the present application, by using the same parasitic stub (i.e., the first parasitic stub 111), the circular polarization gain of the antenna radiator 102 supporting the target frequency band can be improved when the second main body 11 is in the unfolded state or the folded state relative to the first main body 10, thereby improving the circular polarization performance of the antenna radiator 102 and meeting the requirements of satellite communication for antenna performance.

[0112] In Figure 6 Based on the shown embodiments, hereinafter, in combination with several possible settings of the switch circuit, the selective conduction process of the first tuning circuit and the second tuning circuit will be introduced.

[0113] Hereinafter, it will be introduced in two cases:

[0114] 1) In the first setting method of the switch circuit, please refer to Figure 7 , the second main body 11 is further provided with a third switch circuit (such as K3 shown in Figure 7 ). The third switch circuit has at least two states, which respectively match the case where the second main body 11 is in the unfolded state relative to the first main body 10, and the case where the second main body 11 is in the folded state relative to the first main body 10.

[0115] Optionally, the third switch circuit can be a single-pole multi-throw switch. As shown in Figure 8 , the first end of the third switch circuit K3 (such as the fixed end of K3 shown in Figure 8 ) is connected to the first parasitic stub 111. The multiple second ends of the third switch circuit K3 (such as the two moving ends of K3 shown in Figure 8 ) are respectively connected to the first tuning circuit and the second tuning circuit correspondingly. The first tuning circuit T1 and the second tuning circuit T2 can be as shown in Figure 8The inductance circuit and capacitance circuit shown.

[0116] Optionally, the third switching circuit can also be a multi-pole multi-throw switch, such as Figure 9 shown. Among them, two switches of the third switching circuit K3 are in the normally open state. The first ends (fixed ends) of the other two switches of the third switching circuit K3 are connected to the first parasitic stub 111. The second ends (movable ends) of the other two switches of the third switching circuit K3 are respectively connected to the first tuning circuit and the second tuning circuit. The first tuning circuit T1 and the second tuning circuit T2 can be Figure 9 the inductance circuit and capacitance circuit shown.

[0117] It should be noted that both the first tuning circuit and the second tuning circuit can include capacitors and / or inductors. The specific tuning parameters of the first tuning circuit and the second tuning circuit need to be determined through debugging, Figure 8 and Figure 9 shown do not constitute a limitation to the first tuning circuit and the second tuning circuit in the embodiments of the present application.

[0118] As described above, the third switching circuit has at least two states, respectively matching the case where the second main body 11 is in the unfolded state relative to the first main body 10, and matching the case where the second main body 11 is in the folded state relative to the first main body 10. In this way, when the second main body 11 is in the unfolded state relative to the first main body 10, the third switching circuit is used to conduct the first tuning circuit and the first parasitic stub 111. The first parasitic stub 111 resonates at the resonant frequency adjusted by the first tuning circuit, thereby changing the resonant current distribution of the ground plane in the electronic device 100 and enhancing the circular polarization gain of the antenna radiator 102 supporting the target frequency band; when the second main body 11 is in the folded state relative to the first main body 10, the third switching circuit is used to conduct the second tuning circuit and the first parasitic stub 111. The first parasitic stub 111 resonates at the resonant frequency adjusted by the second tuning circuit. The resonant frequency of the first parasitic stub 111 is greater than the center frequency of the target frequency band supported by the antenna radiator 102, so that the current direction of the antenna radiator 102 is the same as the current direction of the first parasitic stub 111, improving the antenna efficiency of the antenna radiator 102, thereby enhancing the circular polarization gain of the antenna radiator 102 supporting the target frequency band.

[0119] In this way, by conducting the first tuning circuit or the second tuning circuit through the third switching circuit to adjust the resonant frequency of the first parasitic stub 111, the circular polarization gain of the antenna radiator 102 supporting the target frequency band is improved when the second main body 11 is in the unfolded state or the folded state relative to the first main body 10.

[0120] In an embodiment of the present application, a controller and a detector may also be provided in the electronic device 100. The controller is electrically connected to the detector. The detector can detect the angle information between the first main body portion 10 and the second main body portion 11 in real time or periodically, and send the angle information to the controller. The controller determines whether the states of the first main body portion 10 and the second main body portion 11 are in a folded state or an unfolded state according to the angle information.

[0121] For example, when the angle between the first main body portion 10 and the second main body portion 11 is about 180°, the controller determines that the first main body portion 10 and the second main body portion 11 are in an unfolded state. When the angle between the first main body portion 10 and the second main body portion 11 is 0° or less than a certain threshold (for example, 10°), the controller determines that the first main body portion 10 and the second main body portion 11 are in a folded state. In the case where the second main body portion 11 is in an unfolded state relative to the first main body portion 10, the controller controls the third switch circuit to conduct the first tuning circuit and the first parasitic stub 111. In the case where the second main body portion 11 is in a folded state relative to the first main body portion 10, the controller controls the third switch circuit to conduct the second tuning circuit and the first parasitic stub 111.

[0122] 2) In the second setting manner of the switch circuit, the switch circuits for selectively conducting the first tuning circuit, the second tuning circuit, and the first parasitic stub 111 may be provided separately.

[0123] First, for the first tuning circuit, the electronic device 100 includes two or more first tuning circuits, and the tuning parameters of each first tuning circuit are different. In an embodiment of the present application, the second main body portion 11 is further provided with a first switch circuit. The first end of the first switch circuit is connected to the first parasitic stub 111, and multiple second ends of the first switch circuit are respectively connected to multiple first tuning circuits correspondingly. The first switch circuit is used to selectively conduct the conduction states of the first tuning circuits.

[0124] Among them, in the case where the second main body portion 11 is in an unfolded state relative to the first main body portion 10, at least one first tuning circuit is conductively connected to the first parasitic stub 111 at the same time.

[0125] The tuning parameters of each first tuning circuit may be determined in the debugging stage. When different first tuning circuits are conductively connected to the first parasitic stub 111, the resonant frequencies of the first parasitic stub 111 are different, and the intensities of the resonant current distributions of the target components changed are also different. There are also differences in the contributions to enhancing the circular polarization gain of the antenna radiator 102 supporting the target frequency band.

[0126] It can be understood that during the use of the electronic device 100, different holding postures may cause different degrees of occlusion of the antenna radiator 102. The more the antenna radiator 102 is occluded (i.e., the larger the occluded area), the worse the performance of the antenna radiator 102, and the stronger the need for gain improvement.

[0127] Considering this situation, in a possible implementation, during the debugging phase, the contribution of each first tuning circuit to the circular polarization gain enhancement of the antenna radiator 102 supporting the target frequency band can be determined in advance. In this way, during the implementation process, according to the size of the occluded area of the antenna radiator 102, the corresponding first tuning circuit is selected to be conductively connected to the first parasitic stub 111. Exemplarily, the correspondence between the occlusion ratio of the antenna radiator 102 and each first tuning circuit can be preset in the electronic device 100. During actual implementation, the corresponding first tuning circuit is selected for conduction according to this correspondence.

[0128] For example, the occlusion ratio of the antenna radiator 102 is divided into 1 / 4 occlusion of the antenna radiator 102, 1 / 2 occlusion of the antenna radiator 102, and 3 / 4 occlusion of the antenna radiator 102. The contribution levels of each first tuning circuit to the circular polarization gain enhancement of the antenna radiator 102 supporting the target frequency band are the first level, the second level, and the third level respectively. The contribution degrees of the first level, the second level, and the third level decrease in sequence. In this way, if 1 / 4 of the antenna radiator 102 is occluded, the first tuning circuit with the contribution level of the third level can be selected to be conductively connected to the first parasitic stub 111; if 1 / 2 of the antenna radiator 102 is occluded, the first tuning circuit with the contribution level of the second level can be selected to be conductively connected to the first parasitic stub 111; if 3 / 4 of the antenna radiator 102 is occluded, the first tuning circuit with the contribution level of the first level can be selected to be conductively connected to the first parasitic stub 111 to enhance the circular polarization gain of the antenna radiator 102 supporting the target frequency band.

[0129] In the embodiment of the present application, a controller is further provided in the electronic device 100. The selection process of the above-mentioned multiple first tuning circuits can be implemented by the controller. After the controller determines the selected first tuning circuit, the controller controls the first switch circuit to conduct the selected first tuning circuit and the first parasitic stub 111, while the other unselected first tuning circuits are in an off state.

[0130] In addition, it should be noted that when the second main body portion 11 is in a folded state relative to the first main body portion 10, the first switch circuit is in an off state, that is, when the second main body portion 11 is in a folded state relative to the first main body portion 10, each first tuning circuit will not be conductively connected to the first parasitic stub 111.

[0131] Similar to the above-described first tuning circuit, the electronic device 100 includes two or more second tuning circuits, and the tuning parameters of each second tuning circuit are different. In the second embodiment of the present application, the second main body 11 is further provided with a second switching circuit. The first end of the second switching circuit is connected to the first parasitic stub 111, and a plurality of second ends of the second switching circuit are respectively connected to a plurality of second tuning circuits. The second switching circuit is used to selectively turn on the conduction states of the second tuning circuits.

[0132] Wherein, when the second main body 11 is in a folded state relative to the first main body 10, at least one second tuning circuit is conductively connected to the first parasitic stub 111 at the same time.

[0133] The tuning parameters of each second tuning circuit can be determined during the debugging stage. When different second tuning circuits are conductively connected to the first parasitic stub 111, the resonant frequencies of the first parasitic stub 111 are different, and the improved antenna efficiencies are also different. There are also differences in the contribution to enhancing the circular polarization gain of the antenna radiator 102 supporting the target frequency band.

[0134] Similar to the selection method of the above-described first tuning circuit, the size of the area where the antenna radiator 102 is blocked can be combined to select the corresponding second tuning circuit to be conductively connected to the first parasitic stub 111, so as to flexibly enhance the circular polarization gain of the antenna radiator 102 supporting the target frequency band. The relevant implementation process can refer to the relevant description of selecting the first resonant circuit in the above text and will not be elaborated here.

[0135] In addition, it should be noted that when the second main body 11 is in an unfolded state relative to the first main body 10, the second switching circuit is in an off state, that is, when the second main body 11 is in an unfolded state relative to the first main body 10, each second tuning circuit will not be conductively connected to the first parasitic stub 111.

[0136] In summary, the setting method of the switching circuit in the embodiment of the present application is flexible. By selectively turning on the first tuning circuit and the second tuning circuit through the switching circuit, the circular polarization gain of the antenna radiator 102 supporting the target frequency band is improved when the second main body 11 is in an unfolded state or a folded state relative to the first main body 10.

[0137] Based on the above embodiments, a plurality of first parasitic stubs 111 can be provided on the second main body 11 of the embodiment of the present application. Some or all of the plurality of first parasitic stubs 111 are correspondingly connected to the above-described first tuning circuit and second tuning circuit. Hereinafter, with reference to the drawings, an exemplary description of possible antenna combination setting methods in the electronic device 100 will be given.

[0138] In this embodiment, a plurality of first parasitic stubs 111 are provided on the second main body portion 11. The first parasitic stubs 111 are arranged in sequence, and a gap is formed between two adjacent first parasitic stubs 111, and capacitive coupling can be achieved through the gap.

[0139] Among them, a target first parasitic stub 111' among the plurality of first parasitic stubs 111 is correspondingly connected to a first tuning circuit and a second tuning circuit. The target first parasitic stub 111' is at least one of the plurality of first parasitic stubs 111, and the other first parasitic stubs 112 except the target first parasitic stub 111' are connected to the ground plane.

[0140] Hereinafter, three possible scenarios will be introduced separately:

[0141] 1. A scenario where an antenna radiator 102 is provided on the first main body portion 10 and a plurality of first parasitic stubs 111 are provided on the second main body portion 11.

[0142] Taking the plurality of first parasitic stubs 111 being two first parasitic stubs 111 as an example, it is divided into the following two cases:

[0143] 1) Both of the two first parasitic stubs 111 are correspondingly connected to a first tuning circuit and a second tuning circuit, that is, both of the two first parasitic stubs 111 are target first parasitic stubs 111'.

[0144] Please refer to Figure 10 and Figure 11 , Figure 10 , which is an exemplary schematic diagram of the antenna combination of the electronic device 100 when the second main body portion 11 is in an unfolded state relative to the first main body portion 10, Figure 11 , which is an exemplary schematic diagram of the antenna combination of the electronic device 100 when the second main body portion 11 is in a folded state relative to the first main body portion 10.

[0145] As Figure 10 and Figure 11 shown, the two target first parasitic stubs 111' (such as the EF stub and the HG stub shown in Figure 10 and Figure 11 ) are arranged in sequence, and a gap is formed between the two target first parasitic stubs 111', and capacitive coupling can be achieved between them through the gap.

[0146] One end of each target first parasitic stub 111' is connected to the ground plane, and the other end of the target first parasitic stub 111' is correspondingly connected to a first tuning circuit and a second tuning circuit. The first tuning circuit and the second tuning circuit can be selectively conducted with the corresponding target first parasitic stub 111' through a third switching circuit ( Figure 10 and Figure 11 not shown).

[0147] When the second main body portion 11 is in an unfolded state relative to the first main body portion 10, the two target first parasitic stubs 111' are respectively conductively connected to the corresponding first tuning circuits, changing the resonant current distribution of the ground plane in the electronic device 100 and enhancing the circular polarization gain of the antenna radiator 102 that supports the target frequency band.

[0148] When the second main body portion 11 is in a folded state relative to the first main body portion 10, the two target first parasitic stubs 111' are respectively conductively connected to the corresponding second tuning circuits, and the resonant frequencies of the two target first parasitic stubs 111' are respectively greater than the center frequency of the target frequency band supported by the antenna radiator 102, so that the current directions of the antenna radiator 102 and the two target first parasitic stubs 111' are the same, improving the antenna efficiency of the antenna radiator 102, thereby enhancing the circular polarization gain of the antenna radiator 102 that supports the target frequency band.

[0149] In this embodiment, when the second main body portion 11 is in a folded state relative to the first main body portion 10, the projection of the antenna radiator 102 in the thickness direction of the electronic device 100 and the projection of at least one of the two target first parasitic stubs 111' in the thickness direction at least partially overlap. For example, as Figure 11 shown, when the second main body portion 11 is in a folded state relative to the first main body portion 10, the projection of the antenna radiator 102 in the thickness direction of the electronic device 100 and the projection of the EF stub in the thickness direction at least partially overlap. In other possible embodiments, the projection of the antenna radiator 102 in the thickness direction of the electronic device 100 may also at least partially overlap with the projection of the HG stub in the thickness direction. Optionally, the projection of the antenna radiator 102 in the thickness direction of the electronic device 100 may also not overlap with the projection of the two target first parasitic stubs 111' in the thickness direction.

[0150] 2) Only one of the two first parasitic stubs 111, the target first parasitic stub 111', is correspondingly connected to the first tuning circuit and the second tuning circuit, and the other first parasitic stubs 112 of the two first parasitic stubs 111 except the target first parasitic stub 111' are connected to the ground plane.

[0151] Please refer to Figure 12 and Figure 13 , Figure 12 which is a schematic diagram of the antenna combination of the electronic device 100 when the second main body portion 11 is in an unfolded state relative to the first main body portion 10 by way of example. Figure 13 which is a schematic diagram of the antenna combination of the electronic device 100 when the second main body portion 11 is in a folded state relative to the first main body portion 10 by way of example.

[0152] As Figure 12 and Figure 13As shown, the target first parasitic stub 111' (such as the HG stub shown in Figure 12 and Figure 13 ) and other first parasitic stubs 112 (such as the EF stub shown in Figure 12 and Figure 13 ) are arranged in sequence and a gap is formed between them, and they can be capacitively coupled through the gap.

[0153] One end of the target first parasitic stub 111' is connected to the ground plane, and a first tuning circuit and a second tuning circuit are correspondingly connected to the other end of the target first parasitic stub 111'. The first tuning circuit and the second tuning circuit can be selectively conducted with the corresponding target first parasitic stub 111' through a third switching circuit ( Figure 12 and Figure 13 , not shown); one end of the other first parasitic stubs 112 is connected to the ground plane, and the other end of the other first parasitic stubs 112 is connected to the ground plane or can also be a free end.

[0154] When the second main body 11 is in the unfolded state relative to the first main body 10, the target first parasitic stub 111' is conductively connected to the corresponding first tuning circuit, changing the resonant current distribution of the ground plane in the electronic device 100 and enhancing the circular polarization gain of the antenna radiator 102 supporting the target frequency band.

[0155] When the second main body 11 is in the folded state relative to the first main body 10, the target first parasitic stub 111' is conductively connected to the corresponding second tuning circuit. The resonant frequency of the target first parasitic stub 111' is greater than the center frequency of the target frequency band supported by the antenna radiator 102, so that the current direction of the antenna radiator 102 is the same as the current direction of the target first parasitic stub 111', improving the antenna efficiency of the antenna radiator 102, thereby enhancing the circular polarization gain of the antenna radiator 102 supporting the target frequency band.

[0156] In the embodiment shown in Figure 13 , when the second main body 11 is in the folded state relative to the first main body 10, the projection of the antenna radiator 102 in the thickness direction of the electronic device 100 and the projection of the other first parasitic stubs 112 in the thickness direction at least partially overlap. Of course, in other embodiments, the projection of the antenna radiator 102 in the thickness direction may also be at least partially overlapped with the projection of the target first parasitic stub 111' in the thickness direction (for example, in Figure 12 and Figure 13In the illustrated embodiment, the EF stub can be selectively and conductively connected to the first tuning circuit or the second tuning circuit as the target first parasitic stub 111', and the HG stub can be connected to the ground plane as the other first parasitic stubs 112). Optionally, the projection of the antenna radiator 102 in the thickness direction may not overlap with the projection of the other first parasitic stubs 112 in the thickness direction, and the projection of the antenna radiator 102 in the thickness direction does not overlap with the projection of the target first parasitic stub 111' in the thickness direction.

[0157] 2. A scenario where an antenna radiator 102 and a second parasitic stub 103 are provided on the first main body 10, and a plurality of first parasitic stubs 111 are provided on the second main body 11, and the second parasitic stub 103 is connected to the ground plane, that is, the second parasitic stub 103 is not used.

[0158] Based on the above first scenario, in this embodiment, the first main body 10 is further provided with a second parasitic stub 103, and a second grounding point is provided on the second parasitic stub 103. The second grounding point can be respectively provided at both ends of the second parasitic stub 103. Both ends of the second parasitic stub 103 are respectively connected to the ground plane through the second grounding point. A gap is formed between the second parasitic stub 103 and the antenna radiator 102, and capacitive coupling can be achieved through the gap.

[0159] Taking the plurality of first parasitic stubs 111 being two first parasitic stubs 111 as an example, it is divided into two cases:

[0160] 1) Only one target first parasitic stub 111' among the two first parasitic stubs 111 is correspondingly connected to the first tuning circuit and the second tuning circuit, and the other first parasitic stubs 112 among the two first parasitic stubs 111 are connected to the ground plane.

[0161] Please refer to Figure 14 and Figure 15 , Figure 14 which is an exemplary schematic diagram of the antenna combination of the electronic device 100 when the second main body 11 is in an unfolded state relative to the first main body 10, Figure 15 which is an exemplary schematic diagram of the antenna combination of the electronic device 100 when the second main body 11 is in a folded state relative to the first main body 10.

[0162] As Figure 14 and Figure 15 shown, both ends of the second parasitic stub 103 are respectively connected to the ground plane, and the target first parasitic stub 111' (such as the HG stub shown in Figure 14 and Figure 15 ) and the other first parasitic stubs 112 (such as the stubs shown in Figure 14 and Figure 15The EF stub shown) are arranged in sequence, and a gap is formed between the two, and the two can be capacitively coupled through the gap.

[0163] One end of the target first parasitic stub 111' is connected to the ground plane, and a first tuning circuit and a second tuning circuit are correspondingly connected to the other end of the target first parasitic stub 111'. The first tuning circuit and the second tuning circuit can be selectively conducted with the corresponding target first parasitic stub 111' through a third switching circuit ( Figure 14 and Figure 15 (not shown); One end of the other first parasitic stubs 112 is connected to the ground plane, and the other end of the other first parasitic stubs 112 is connected to the ground plane or can also be a free end.

[0164] When the second main body 11 is in an unfolded state relative to the first main body 10, the target first parasitic stub 111' is conductively connected to the corresponding first tuning circuit, the resonant frequency of the target first parasitic stub 111' is adjusted, the resonant current distribution of the ground plane in the electronic device 100 is changed, and the circular polarization gain of the antenna radiator 102 supporting the target frequency band is enhanced.

[0165] When the second main body 11 is in a folded state relative to the first main body 10, the target first parasitic stub 111' is conductively connected to the corresponding second tuning circuit, the resonant frequency of the target first parasitic stub 111' is adjusted, and the resonant frequency of the target first parasitic stub 111' is greater than the center frequency of the target frequency band supported by the antenna radiator 102, so that the current direction of the antenna radiator 102 is the same as the current direction of the target first parasitic stub 111', the antenna efficiency of the antenna radiator 102 is improved, and thus the circular polarization gain of the antenna radiator 102 supporting the target frequency band is enhanced.

[0166] In Figure 15 the embodiment shown, as described above, the target first parasitic stub 111' is one of the plurality of first parasitic stubs 111. When the second main body 11 is in a folded state relative to the first main body 10, the antenna radiator 102 is disposed opposite to a first parasitic stub (i.e., the other first parasitic stubs 112, such as Figure 15 the EF stub shown), so that the antenna radiator 102 is coupled to a first parasitic stub other than the target first parasitic stub 111', and the second parasitic stub 103 is close to the target first parasitic stub 111' (such as Figure 15 the HG stub shown), so that the second parasitic stub 103 is coupled to the target first parasitic stub 111'.

[0167] When the second main body portion 11 is in a folded state relative to the first main body portion 10, the projection of the antenna radiator 102 in the thickness direction of the electronic device 100 and the projection of a first parasitic stub (i.e., other first parasitic stub 112) other than the target first parasitic stub 111' in the thickness direction at least partially overlap, and the projection of the second parasitic stub 103 in the thickness direction and the projection of the target first parasitic stub 111' in the thickness direction at least partially overlap. Optionally, the projection of the antenna radiator 102 in the thickness direction of the electronic device 100 and the projection of a first parasitic stub (i.e., other first parasitic stub 112) other than the target first parasitic stub 111' in the thickness direction may not overlap, and the projection of the second parasitic stub 103 in the thickness direction and the projection of the target first parasitic stub 111' in the thickness direction may also not overlap.

[0168] Optionally, Figure 14 and Figure 15 the EF stub in Figure 16 and Figure 17 can be used as the target first parasitic stub 111', and the HG stub can be used as the other first parasitic stub 112. Refer to Figure 16 which is a schematic diagram of the antenna combination of the electronic device 100 when the second main body portion 11 is in an unfolded state relative to the first main body portion 10 by way of example, Figure 17 and

[0169] Figure 17 which is a schematic diagram of the antenna combination of the electronic device 100 when the second main body portion 11 is in a folded state relative to the first main body portion 10 by way of example. As shown in

[0170] When the second main body portion 11 is in a folded state relative to the first main body portion 10, at least a part of the projection of the antenna radiator 102 in the thickness direction of the electronic device 100 overlaps with the projection of the target first parasitic stub 111' in the thickness direction, and at least a part of the projection of the second parasitic stub 103 in the thickness direction overlaps with the projection of a first parasitic stub (i.e., other first parasitic stubs 112) other than the target first parasitic stub 111' in the thickness direction. Optionally, the projection of the antenna radiator 102 in the thickness direction of the electronic device 100 may not overlap with the projection of the target first parasitic stub 111' in the thickness direction, and the projection of the second parasitic stub 103 in the thickness direction may not overlap with the projection of a first parasitic stub (i.e., other first parasitic stubs 112) other than the target first parasitic stub 111' in the thickness direction.

[0171] In this way, in this embodiment, a parasitic stub (i.e., the target first parasitic stub 111') is used to connect the first tuning circuit and the second tuning circuit, and the resonance frequency of the target first parasitic stub 111' is adjusted by the first tuning circuit or the second tuning circuit when the second main body portion 11 is in an unfolded state or a folded state relative to the first main body portion 10, so that the circular polarization gain of the antenna radiator 102 supporting the target frequency band is improved when the second main body portion 11 is in an unfolded state or a folded state relative to the first main body portion 10.

[0172] Hereinafter, taking the case where the second main body portion 11 is in an unfolded state relative to the first main body portion 10 as an example, on the basis of the Figure 14 shown embodiment, combined with the current vector diagram and the radiation pattern, the beneficial effects of the Figure 14 shown embodiment are described.

[0173] Assume that the target frequency band is the Tian Tong-1 satellite communication frequency band, and the Tian Tong-1 satellite communication uses LHCP (Left-Hand Circular Polarization) waves.

[0174] Please refer to Figure 18a and Figure 18b , Figure 18a which is the current distribution vector diagram of the antenna radiator 102 when the second main body portion 11 does not use the first parasitic stub 111 and works in the target frequency band when the second main body portion 11 is in an unfolded state relative to the first main body portion 10 in the conventional technology. Figure 18b This is the current distribution vector diagram of the antenna radiator 102 when the second main body portion 11 of the embodiment of the present application is provided with two first parasitic stubs 111 (such as the HG stub and the EF stub shown in Figure 14 ), where the HG stub is correspondingly connected to the first tuning circuit and the second tuning circuit, and the EF stub is connected to the ground plane.

[0175] Figure 18a and Figure 18b The position shown by ANT1 in Figure 18b is the antenna radiator 102 of the first main body 10, the HG stub is the target first parasitic antenna in the second main body 11, and the dotted area is the area where the resonant current distribution changes greatly when the HG stub is conductively connected to the first tuning circuit. Through Figure 18a and Figure 18b comparison, it can be seen that by using the HG stub, the current distribution (including the current direction and magnitude) of the ground plane changes when the antenna radiator 102 operates in the target frequency band.

[0176] Please refer to Figure 19a and Figure 19b , Figure 19a For the conventional technology, when the second main body 11 is in an unfolded state relative to the first main body 10, the first parasitic stub 111 is not used in the second main body 11, and the LHCP pattern of the antenna radiator 102 when the antenna radiator 102 operates in the target frequency band. Figure 19b In the embodiment of the present application, the second main body 11 is provided with two first parasitic stubs 111 (such as Figure 14 the HG stub and the EF stub shown), wherein the HG stub is correspondingly connected to the first tuning circuit and the second tuning circuit, and the LHCP pattern of the antenna radiator 102 when the EF stub is connected to the ground plane and the antenna radiator 102 operates in the target frequency band.

[0177] Through Figure 19a and Figure 19b comparison, it can be seen that Figure 19a in Figure 19a , the maximum directivity in the upper hemisphere is -0.5 dBic. By using the HG stub, the maximum directivity in the upper hemisphere is increased to 0 dBic, improving the circular polarization gain directivity of the antenna radiator 102.

[0178] The circular polarization gain of the antenna radiator 102 can be calculated by the following formula:

[0179] Gain(dBic)= directivity(dBic)+efficiency(dB) Formula 1

[0180] where Gain is the circular polarization gain of the antenna radiator 102, directivity refers to the directivity of the antenna radiator 102, and efficiency refers to the antenna efficiency of the antenna radiator 102. In the embodiment of the present application, the directivity of the antenna radiator 102 is improved, and by adding the HG stub to jointly support the target frequency band with the antenna radiator 102, the antenna efficiency of the antenna radiator 102 will not be reduced. Therefore, in the embodiment of the present application, when the second main body 11 is in an unfolded state relative to the first main body 10, the circular polarization gain of the antenna radiator 102 is improved.

[0181] When the target frequency band is the Tian Tong No. 1 satellite communication frequency band and the second main body 11 is in an unfolded state relative to the first main body 10, the left-handed circular polarization gain in the upper hemisphere is increased.

[0182] Hereinafter, taking the case where the second main body 11 is in a folded state relative to the first main body 10 as an example, based on the Figure 15 illustrated embodiment, in conjunction with the accompanying drawings, the beneficial effects of the Figure 15 illustrated embodiment will be described.

[0183] Please refer to Figure 20 , Figure 20 which is Figure 15 a schematic diagram of the current directions in the antenna radiator 102 and the target first parasitic stub 111' (such as the Figure 20 HG stub) in the illustrated embodiment. In Figure 20 , the arrow directions in the antenna radiator 102 and the HG stub are the current directions of the antenna radiator 102 and the HG stub.

[0184] It can be seen that when the second main body 11 is in a folded state relative to the first main body 10, the second tuning switch of the HG stub makes the resonance frequency of the HG stub greater than the center frequency of the target frequency band supported by the antenna radiator 102, so that the current direction of the antenna radiator 102 is the same as the current direction of the HG stub, thereby improving the antenna efficiency of the antenna radiator 102.

[0185] Refer to Figure 21 , Figure 21 which is a schematic diagram of the S parameters of the antenna radiator 102 when the second main body 11 is in a folded state relative to the first main body 10. Figure 21 The S11 shown in Figure 21 is one of the S parameters, representing the return loss characteristic. In

[0186] ANT1 in Figure 21 represents the antenna radiator 102, and HG represents the HG stub.

[0187] Refer to Figure 22 , Figure 22 which is a comparison diagram of the antenna efficiency when the second main body 11 of the traditional technology does not use the first parasitic stub 111 and the antenna radiator 102 operates in the target frequency band and the antenna efficiency of the antenna radiator 102 in the Figure 15 illustrated embodiment of the present application when the antenna radiator 102 operates in the target frequency band.

[0188] It can be seen from Figure 22It can be seen that in the embodiment of the present application, the second tuning switch of the HG stub enables the resonant frequency of the HG stub to be greater than the antenna frequency of the antenna radiator 102, which can significantly improve the antenna efficiency of the antenna radiator 102. And it can be known from Formula 1 that when the antenna efficiency is improved, the circular polarization gain of the antenna radiator 102 will also be improved.

[0189] The following continues to introduce possible antenna combination setting methods of the electronic device 100. In the current second scenario (that is, the antenna radiator 102 and the second parasitic stub 103 are provided on the first main body 10, and a plurality of first parasitic stubs 111 are provided on the second main body 11, and the second parasitic stub 103 is connected to the ground plane), there is also the following situation:

[0190] 2) Both of the two first parasitic stubs 111 are correspondingly connected with a first tuning circuit and a second tuning circuit, that is, both of the two first parasitic stubs 111 are the target first parasitic stubs 111'.

[0191] Please refer to Figure 23 and Figure 24 , Figure 23 which is a schematic diagram of the antenna combination of the electronic device 100 when the second main body 11 is in an unfolded state relative to the first main body 10 as an example, Figure 24 and which is a schematic diagram of the antenna combination of the electronic device 100 when the second main body 11 is in a folded state relative to the first main body 10 as an example.

[0192] In this embodiment, the target first parasitic stub 111' is two of the plurality of first parasitic stubs 111. When the second main body 11 is in a folded state relative to the first main body 10, the antenna radiator 102 is close to a target first parasitic stub 111' (such as Figure 23 and Figure 24 the EF stub shown), so that the antenna radiator 102 is coupled with a target first parasitic stub 111' (such as Figure 23 and Figure 24 the EF stub shown), and the second parasitic stub 103 is close to another target first parasitic stub 111' (such as Figure 23 and Figure 24 the HG stub shown), so that the second parasitic stub 103 is coupled with another target first parasitic stub 111' (such as Figure 23 and Figure 24 the HG stub shown).

[0193] One end of the target first parasitic stub 111' is connected to the ground plane, and the other end of the target first parasitic stub 111' is correspondingly connected with a first tuning circuit and a second tuning circuit. The first tuning circuit and the second tuning circuit can be connected through a third switch circuit ( Figure 23 and Figure 24(not shown) is selectively conducted with the corresponding target first parasitic stub 111'.

[0194] When the second main body 11 is in an unfolded state relative to the first main body 10, the two target first parasitic stubs 111' are conductively connected to their corresponding first tuning circuits, the resonant frequencies of the respective target first parasitic stubs 111' are adjusted, the resonant current distribution of the ground plane in the electronic device 100 is changed, and the circular polarization gain of the antenna radiator 102 supporting the target frequency band is enhanced.

[0195] When the second main body 11 is in a folded state relative to the first main body 10, the two target first parasitic stubs 111' are conductively connected to their corresponding second tuning circuits, the resonant frequencies of the target first parasitic stubs 111' are adjusted, the resonant frequencies of the respective target first parasitic stubs 111' are greater than the center frequency of the target frequency band supported by the antenna radiator 102, so that the current direction of the antenna radiator 102 is the same as the current direction of the respective target first parasitic stubs 111', the antenna efficiency of the antenna radiator 102 is improved, and thus the circular polarization gain of the antenna radiator 102 supporting the target frequency band is enhanced.

[0196] In this embodiment, the projection of the antenna radiator 102 in the thickness direction of the electronic device and the projection of a target first parasitic stub 111' (such as Figure 24 the EF stub shown) in this thickness direction at least partially overlap, and the projection of the second parasitic stub 103 in this thickness direction and the projection of another target first parasitic stub 111' (such as Figure 24 the HG stub shown) in this thickness direction at least partially overlap. Optionally, the projection of the antenna radiator 102 in the thickness direction of the electronic device and the projection of a target first parasitic stub 111' (such as Figure 24 the EF stub shown) in this thickness direction may also not overlap, and the projection of the second parasitic stub 103 in this thickness direction and the projection of another target first parasitic stub 111' (such as Figure 24 the HG stub shown) in this thickness direction may also not overlap.

[0197] 3. The scenario where the antenna radiator 102 and the second parasitic stub 103 support the target frequency band when the antenna radiator 102 and the second parasitic stub 103 are provided on the first main body 10, and a plurality of first parasitic stubs 111 are provided on the second main body 11, and the feed source 101 feeds a feed signal to the antenna radiator 102 through the feed point:

[0198] In this embodiment, based on the above-mentioned first scenario and second scenario, that is, the first main body 10 is provided with a second parasitic stub 103, the second parasitic stub 103 is provided with a second grounding point connected to the ground plane, a gap is formed between the second parasitic stub 103 and the antenna radiator 102, and on the basis that capacitive coupling can be achieved through the gap, in this embodiment, the first main body 10 is further provided with a third tuning circuit. The first end of the third tuning circuit is connected to the second grounding point on the second parasitic stub 103, and the second end of the third tuning circuit is connected to the ground plane.

[0199] Wherein, the feed source 101 feeds a feed signal into the antenna radiator 102 through the feeding point. The antenna radiator 102 is capacitively coupled to the second parasitic stub 103 so that the antenna radiator 102 and the second parasitic stub 103 support the target frequency band. The third tuning circuit is used to adjust the resonant frequency of the antenna radiator 102, and the feed source 101 is arranged on the first main body 10.

[0200] Taking the case where there are two first parasitic stubs 111 as an example, it can be divided into two situations:

[0201] 1) Only one target first parasitic stub 111' among the two first parasitic stubs 111 is correspondingly connected with a first tuning circuit and a second tuning circuit, and the other first parasitic stubs 112 among the two first parasitic stubs 111 except the target first parasitic stub 111' are connected to the ground plane.

[0202] Please refer to Figure 25 , Figure 25 , which is a schematic structural diagram of an exemplary electronic device 100 in the unfolded state. The first main body 10 is provided with a second parasitic stub 103, and the second parasitic stub 103 is provided with a second grounding point connected to the ground plane ( Figure 25 S2 shown), a gap is formed between the second parasitic stub 103 and the antenna radiator 102, and the second parasitic stub 103 and the antenna radiator 102 can be capacitively coupled through this gap.

[0203] In this embodiment, the first main body 10 is further provided with a third tuning circuit (such as Figure 25 T3 shown), the first end of the third tuning circuit is connected to the second grounding point on the second parasitic stub 103, and the second end of the third tuning circuit is connected to the ground plane.

[0204] Wherein, the feed source 101 feeds a feed signal into the antenna radiator 102 through the feeding point. The antenna radiator 102 is capacitively coupled to the second parasitic stub 103 so that the antenna radiator 102 and the second parasitic stub 103 support the target frequency band. The third tuning circuit is used to adjust the resonant frequency of the antenna radiator 102. For example, the third tuning circuit adjusts the resonant frequency of the antenna radiator 102 to be within the above-mentioned target frequency band.

[0205] Please refer to Figure 26 and Figure 27 , Figure 26 which are Figure 25 corresponding schematic diagrams of the antenna combination of the electronic device 100 when the second main body 11 is in an unfolded state relative to the first main body 10, Figure 27 and Figure 25 which are corresponding schematic diagrams of the antenna combination of the electronic device 100 when the second main body 11 is in a folded state relative to the first main body 10.

[0206] As shown in Figure 26 and Figure 27 ,one end of the target first parasitic stub 111' (such as the HG stub shown in Figure 26 and Figure 27 ) is connected to the ground plane, and a first tuning circuit and a second tuning circuit are correspondingly connected to the other end of the target first parasitic stub 111'. The first tuning circuit and the second tuning circuit can be selectively conducted with the corresponding target first parasitic stub 111' through a third switching circuit ( Figure 26 and Figure 27 , not shown); one end of the other first parasitic stubs 112 (such as the EF stub shown in Figure 26 and Figure 27 ) is connected to the ground plane, and the other end of the other first parasitic stubs 112 is connected to the ground plane or can also be a free end.

[0207] In the case where the second main body 11 is in an unfolded state relative to the first main body 10, the target first parasitic stub 111' is conductively connected to the corresponding first tuning circuit, the resonant frequency of the target first parasitic stub 111' is adjusted, the resonant current distribution of the ground plane in the electronic device 100 is changed, and the circular polarization gain of the antenna radiator 102 supporting the target frequency band is enhanced.

[0208] In the case where the second main body 11 is in a folded state relative to the first main body 10, the target first parasitic stub 111' is conductively connected to the corresponding second tuning circuit, the resonant frequency of the target first parasitic stub 111' is adjusted, and the resonant frequency of the target first parasitic stub 111' is greater than the center frequency of the target frequency band supported by the antenna radiator 102, so that the current direction of the antenna radiator 102 is the same as the current direction of the target first parasitic stub 111', the antenna efficiency of the antenna radiator 102 is improved, and thus the circular polarization gain of the antenna radiator 102 supporting the target frequency band is enhanced.

[0209] Please refer to Figure 28a and Figure 28b , Figure 28aSchematic diagram of the S parameters of the antenna radiator 102 when the antenna radiator 102 and the second parasitic stub 103 radiate together with the second body portion 11 in a folded state relative to the first body portion 10; Figure 28b Schematic diagram of the S parameters of the antenna radiator 102 when the antenna radiator 102 and the second parasitic stub 103 radiate together with the second body portion 11 in a folded state relative to the first body portion 10, and when the resonant frequency of the target first parasitic stub 111' is adjusted using the target first parasitic stub 111' of the embodiment of the present application.

[0210] Figure 28a and Figure 28b In, AB is the antenna radiator 102, CD is the second parasitic stub 103, and HG is the target first parasitic stub 111'. From Figure 28a and Figure 28b it can be seen that by using the HG stub, the resonant frequency range of the antenna radiator 102 is increased, and the antenna efficiency of the antenna radiator 102 is improved.

[0211] In Figures 26 - 27 the embodiment shown, as described above, the target first parasitic stub 111' is one of the plurality of first parasitic stubs 111. When the second body portion 11 is in a folded state relative to the first body portion 10 (such as the state shown in Figure 27 ), the antenna radiator 102 approaches a first parasitic stub other than the target first parasitic stub 111' (i.e., other first parasitic stubs 112, such as the EF stub shown in Figure 27 ), so that the antenna radiator 102 is coupled to a first parasitic stub other than the target first parasitic stub 111' (such as the EF stub shown in Figure 27 ), and the second parasitic stub 103 approaches the target first parasitic stub 111' (such as the HG stub shown in Figure 27 ), so that the second parasitic stub 103 is coupled to the target first parasitic stub 111'.

[0212] The projection of the antenna radiator 102 in the thickness direction of the electronic device 100 and the projection of a first parasitic stub other than the target first parasitic stub 111' (i.e., other first parasitic stubs 112) in the thickness direction at least partially overlap, and the projection of the second parasitic stub 103 in the thickness direction and the projection of the target first parasitic stub 111' in the thickness direction at least partially overlap. Optionally, the projection of the antenna radiator 102 in the thickness direction of the electronic device 100 and the projection of a first parasitic stub other than the target first parasitic stub 111' (i.e., other first parasitic stubs 112) in the thickness direction do not overlap, and the projection of the second parasitic stub 103 in the thickness direction and the projection of the target first parasitic stub 111' in the thickness direction do not overlap.

[0213] Figures 26 - 27 Both take the target first parasitic stub 111' as Figures 26 - 27 the HG stub shown as an example for illustration. It can be understood that Figures 26 - 27 the EF stub shown can also be used as the target first parasitic stub 111', that is, any one of the two first parasitic stubs 111 can be used as the target first parasitic stub 111', and the other is the other first parasitic stub 112.

[0214] See Figures 29 - 30 , one end of the target first parasitic stub 111' (such as Figure 29 and Figure 30 the EF stub shown) is connected to the ground plane, and the other end of the target first parasitic stub 111' is correspondingly connected with a first tuning circuit and a second tuning circuit. The first tuning circuit and the second tuning circuit can be selectively conducted with the corresponding target first parasitic stub 111' through a third switching circuit ( Figure 29 and Figure 30 not shown); one end of the other first parasitic stub 112 (such as Figure 29 and Figure 30 the HG stub shown) is connected to the ground plane, and the other end of the other first parasitic stub 112 is connected to the ground plane or can also be a free end.

[0215] In Figures 29 - 30 the embodiment shown, as described above, the target first parasitic stub 111' is one of the plurality of first parasitic stubs 111. When the second main body 11 is in a folded state relative to the first main body 10, the antenna radiator 102 is close to the target first parasitic stub 111', so that the antenna radiator 102 is coupled with the target first parasitic stub 111', and the second parasitic stub 103 is close to a first parasitic stub other than the target first parasitic stub 111' (that is, the other first parasitic stub 112), so that the second parasitic stub 103 is coupled with a first parasitic stub other than the target first parasitic stub 111' (that is, the other first parasitic stub 112).

[0216] When the second main body portion 11 is in a folded state relative to the first main body portion 10, at least a part of the projection of the antenna radiator 102 in the thickness direction of the electronic device 100 overlaps with the projection of the target first parasitic stub 111' in the thickness direction, and at least a part of the projection of the second parasitic stub 103 in the thickness direction overlaps with the projection of a first parasitic stub other than the target first parasitic stub 111' (i.e., the other first parasitic stub 112) in the thickness direction. Optionally, the projection of the antenna radiator 102 in the thickness direction of the electronic device 100 does not overlap with the projection of the target first parasitic stub 111' in the thickness direction, and the projection of the second parasitic stub 103 in the thickness direction does not overlap with the projection of a first parasitic stub other than the target first parasitic stub 111' (i.e., the other first parasitic stub 112) in the thickness direction.

[0217] In this way, when the second main body portion 11 is in an unfolded state or a folded state relative to the first main body portion 10, the target first parasitic stub 111' is conductively connected to the corresponding second tuning circuit to adjust the resonant frequency of the target first parasitic stub 111', and the circular polarization gain of the linear radiator supporting the target frequency band can be enhanced.

[0218] Furthermore, Figures 26 - 27 In the illustrated embodiments, the description is made with the second parasitic stub 103 disposed between the antenna radiator 102 and the rotating shaft 12. Of course, in some embodiments, the antenna radiator 102 and the second parasitic stub 103 may be exchanged in their disposed positions, that is, the antenna radiator 102 is disposed between the second parasitic stub 103 and the rotating shaft 12.

[0219] Exemplarily, refer to Figures 31 - 32 , Figure 31 FIG. is a schematic diagram of the antenna combination of the electronic device 100 when the second main body portion 11 is in an unfolded state relative to the first main body portion 10. Figure 32 FIG. is a schematic diagram of the antenna combination of the electronic device 100 when the second main body portion 11 is in a folded state relative to the first main body portion 10.

[0220] In this case, when the second main body portion 11 is in a folded state relative to the first main body portion 10, the antenna radiator 102 is close to the target first parasitic stub 111', so that the antenna radiator 102 is coupled to the target first parasitic stub 111', and the second parasitic stub 103 is close to a first parasitic stub other than the target first parasitic stub 111' (i.e., the other first parasitic stub 112), so that the second parasitic stub 103 is coupled to a first parasitic stub other than the target first parasitic stub 111' (i.e., the other first parasitic stub 112).

[0221] When the second main body part 11 is in a folded state relative to the first main body part 10, the projection of the antenna radiator 102 in the thickness direction of the electronic device 100 and the projection of the target first parasitic branch 111' in the thickness direction of the electronic device 100 at least partially overlap, and the projection of the second parasitic branch 103 in the thickness direction of the electronic device 100 and the projection of a first parasitic branch other than the target first parasitic branch 111' (i.e., other first parasitic branches 112) in the thickness direction of the electronic device 100 at least partially overlap. Optionally, the overlap between the projection of the antenna radiator 102 in the thickness direction of the electronic device 100 and the projection of the target first parasitic branch 111' in the thickness direction of the electronic device 100, and the projection of the second parasitic branch 103 in the thickness direction of the electronic device 100 and the projection of a first parasitic branch other than the target first parasitic branch 111' (i.e., other first parasitic branches 112) in the thickness direction of the electronic device 100 do not overlap.

[0222] It should be noted that for the grounding arrangement involved in the embodiments of the present application, for example, the antenna radiator 102 is connected to the ground plane through a first grounding point, and there are the following several possible implementation manners:

[0223] 1) Metal grounding can be adopted. For example, the first grounding point on the antenna radiator 102 is connected to the ground plane through metal, and the metal can be a metal shrapnel or the frame of the electronic device 100.

[0224] 2) It can also be connected to the ground plane through a capacitor and / or an inductor. For example, the first grounding point on the antenna radiator 102 is connected to the ground plane through a capacitor, the first grounding point on the antenna radiator 102 is connected to the ground plane through an inductor, or the first grounding point on the antenna radiator 102 is connected to the ground plane through a capacitor-inductor combination circuit.

[0225] Exemplarily, referring to Figure 33 , Figure 33 shows two possible circuit schematic diagrams of the capacitor-inductor combination circuit.

[0226] In this way, the grounding arrangement in the embodiments of the present application is flexible and variable, which is beneficial to reducing the implementation difficulty of the embodiments of the present application.

[0227] In some related technologies, the parasitic effect of the secondary screen is also used to improve the antenna performance in the folded state. For example, referring to Figure 34 , Figure 34 is a schematic diagram of an antenna using the parasitic effect of the secondary screen to improve the performance in the folded state as an example.

[0228] In Figure 34In the technology shown, the ANT1 antenna on the main screen side usually uses the stub on the secondary screen side as the parasite of the ANT1 antenna in the folded state to improve the antenna performance in the folded state. However, in this solution, when the foldable electronic device 100 is in the unfolded state, the antenna performance cannot be improved.

[0229] In the embodiments of the present application, through the above-mentioned implementation manner, by arbitrarily combining a plurality of first parasitic stubs 111 or only one first parasitic stub 111, the circular polarization gain of the antenna radiator 102 supporting the target frequency band is improved when the second main body portion 11 is in the unfolded state or the folded state relative to the first main body portion 10.

[0230] In the description of this specification, the description with reference to terms such as "some embodiments", "other embodiments", etc. means that the specific features, structures, materials or features described in connection with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic description of the above terms does not necessarily refer to the same embodiment or example.

[0231] The technical features of the above-mentioned embodiments can be combined arbitrarily. For the sake of brevity of description, not all possible combinations of the technical features in the above-mentioned embodiments are described. However, as long as there is no contradiction in the combination of these technical features, it should be considered as the scope described in this specification.

[0232] The above-mentioned embodiments only represent several implementation manners of the present application. The description is relatively specific and detailed, but it cannot be understood as a limitation to the scope of the present application. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present application, several modifications and improvements can still be made, and these all belong to the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the appended claims.

Claims

1. An electronic device, characterized in that, Comprising: A first main body part, on which an antenna radiator is provided. A feeding point and a first grounding point are provided on the antenna radiator, and the feeding point is used for connecting with a feed source; A ground plane, and the first grounding point is connected with the ground plane; A second main body part, which can be in a folded state or an unfolded state relative to the first main body part. The second main body part is provided with a first parasitic stub and a first tuning circuit. The first end of the first tuning circuit is selectively conductively connected with the first parasitic stub, and the second end of the first tuning circuit is connected with the ground plane; wherein, The feed source feeds a feeding signal to the antenna radiator through the feeding point, and the antenna radiator is coupled with the first parasitic stub through the ground plane, so that the antenna radiator and the first parasitic stub support a target frequency band; The first tuning circuit is used for, when the second main body part is in the unfolded state relative to the first main body part, being conductively connected with the first parasitic stub to change the resonant current distribution of the ground plane, so as to enhance the circular polarization gain of the antenna radiator for supporting the target frequency band.

2. The electronic device according to claim 1, wherein When the second main body part is in the unfolded state relative to the first main body part and the first tuning circuit is conductively connected with the first parasitic stub, the difference between the resonant frequency of the first parasitic stub and the center frequency of the target frequency band supported by the antenna radiator is within a preset range.

3. The electronic device according to claim 1, wherein The target frequency band is a satellite communication frequency band.

4. The electronic device according to claim 1, wherein The first tuning circuit is used for, when the second main body part is in the folded state relative to the first main body part, being disconnected from the first parasitic stub.

5. The electronic device according to claim 1, characterized in that, The electronic device includes two or more of the first tuning circuits, and the tuning parameters of each first tuning circuit are different; wherein, when the second main body part is in the unfolded state relative to the first main body part, at least one first tuning circuit is conductively connected with the first parasitic stub at the same time.

6. The electronic device according to claim 5, wherein The second main body part is further provided with a first switch circuit. The first end of the first switch circuit is connected with the first parasitic stub, and multiple second ends of the first switch circuit are respectively correspondingly connected with multiple first tuning circuits; The first switch circuit is used for selectively conducting the conducting states of the first tuning circuits.

7. The electronic device according to claim 6, wherein When the second main body part is in the folded state relative to the first main body part, the first switch circuit is in an off state.

8. The electronic device according to any one of claims 1-7, characterized in that, The second main body part is further provided with a second tuning circuit. The first end of the second tuning circuit is selectively conductively connected with the first parasitic stub, and the second end of the second tuning circuit is connected with the ground plane; wherein, The second tuning circuit is used for, when the second main body part is in the folded state relative to the first main body part, being conductively connected with the first parasitic stub, so that the resonant frequency of the first parasitic stub is greater than the center frequency of the target frequency band supported by the antenna radiator.

9. The electronic device according to claim 8, wherein When the second main body is in a folded state relative to the first main body and the second tuning circuit is conductively connected to the first parasitic stub, the current direction of the antenna radiator is the same as that of the first parasitic stub.

10. The electronic device according to claim 8, wherein The second tuning circuit is configured to disconnect from the first parasitic stub when the second main body is in an unfolded state relative to the first main body.

11. The electronic device according to claim 8, wherein The electronic device includes two or more of the second tuning circuits, and the tuning parameters of each of the second tuning circuits are different; wherein, when the second main body is in a folded state relative to the first main body, at least one of the second tuning circuits is conductively connected to the first parasitic stub at the same time.

12. The electronic device according to claim 11, wherein The second main body is further provided with a second switch circuit, a first end of the second switch circuit is connected to the first parasitic stub, and a plurality of second ends of the second switch circuit are respectively connected to a plurality of the second tuning circuits in correspondence. The second switch circuit is configured to selectively conduct the conduction states of the second tuning circuits.

13. The electronic device according to claim 12, wherein When the second main body is in an unfolded state relative to the first main body, the second switch circuit is in an off state.

14. The electronic device according to claim 8, wherein The second main body is further provided with a third switch circuit, a first end of the third switch circuit is connected to the first parasitic stub, and a plurality of second ends of the third switch circuit are respectively connected to the first tuning circuit and the second tuning circuit in correspondence. The third switch circuit is configured to conduct the first tuning circuit and the first parasitic stub when the second main body is in an unfolded state relative to the first main body, and is further configured to conduct the second tuning circuit and the first parasitic stub when the second main body is in a folded state relative to the first main body.

15. The electronic device according to claim 8, wherein A plurality of first parasitic stubs are provided on the second main body, the first parasitic stubs are arranged in sequence, a gap is formed between two adjacent first parasitic stubs, and capacitive coupling can be achieved through the gap. A target first parasitic stub among the plurality of first parasitic stubs is correspondingly connected to the first tuning circuit and the second tuning circuit; wherein, the target first parasitic stub is at least one of the plurality of first parasitic stubs, and the other first parasitic stubs except the target first parasitic stub are connected to the ground plane.

16. The electronic device according to claim 15, wherein The first main body is further provided with a second parasitic stub, a second grounding point is provided on the second parasitic stub, the second grounding point is connected to the ground plane, a gap is formed between the second parasitic stub and the antenna radiator, and capacitive coupling can be achieved through the gap.

17. The electronic device according to claim 16, wherein The first main body is further provided with a third tuning circuit, a first end of the third tuning circuit is connected to the second grounding point on the second parasitic stub, and a second end of the third tuning circuit is connected to the ground plane; wherein, The feed source feeds a feed signal into the antenna radiator through the feed point, and the antenna radiator is capacitively coupled to the second parasitic stub so that the antenna radiator and the second parasitic stub support the target frequency band; the third tuning circuit is used to adjust the resonant frequency of the antenna radiator, and the feed source is arranged on the first main body part.

18. The electronic device according to claim 16, wherein The target first parasitic stub is one of the plurality of first parasitic stubs. When the second main body part is in a folded state relative to the first main body part: The antenna radiator is close to the target first parasitic stub so that the antenna radiator is coupled to the target first parasitic stub, and the second parasitic stub is close to a first parasitic stub other than the target first parasitic stub so that the second parasitic stub is coupled to a first parasitic stub other than the target first parasitic stub; or, The antenna radiator is close to a first parasitic stub other than the target first parasitic stub so that the antenna radiator is coupled to a first parasitic stub other than the target first parasitic stub, and the second parasitic stub is close to the target first parasitic stub so that the second parasitic stub is coupled to the target first parasitic stub.

19. The electronic device according to claim 18, wherein When the second main body part is in a folded state relative to the first main body part: The projection of the antenna radiator in the thickness direction of the electronic device at least partially overlaps with the projection of the target first parasitic stub in the thickness direction; The projection of the second parasitic stub in the thickness direction of the electronic device at least partially overlaps with the projection of a first parasitic stub other than the target first parasitic stub in the thickness direction.

20. The electronic device according to claim 18, wherein When the second main body part is in a folded state relative to the first main body part: The projection of the antenna radiator in the thickness direction of the electronic device at least partially overlaps with the projection of a first parasitic stub other than the target first parasitic stub in the thickness direction; The projection of the second parasitic stub in the thickness direction of the electronic device at least partially overlaps with the projection of the target first parasitic stub in the thickness direction.

21. The electronic device according to claim 16, characterized in that, The target first parasitic stubs are two of the plurality of first parasitic stubs. When the second main body part is in a folded state relative to the first main body part, the antenna radiator is close to a target first parasitic stub so that the antenna radiator is coupled to a target first parasitic stub, and the second parasitic stub is close to the other target first parasitic stub so that the second parasitic stub is coupled to the other target first parasitic stub.

22. The electronic device according to claim 1, characterized in that, When the second main body part is in a folded state relative to the first main body part, the antenna radiator is close to the first parasitic stub so that the antenna radiator is coupled to the first parasitic stub.

23. The electronic device according to claim 22, wherein When the second main body part is in a folded state relative to the first main body part, the projection of the antenna radiator in the thickness direction of the electronic device at least partially overlaps with the projection of the first parasitic stub in the thickness direction.

24. The electronic device according to claim 22, wherein The electronic device further includes a rotating shaft. The first main body portion includes a first top sub-frame, a first side sub-frame, and a first bottom sub-frame that are sequentially connected. The second main body portion includes a second top sub-frame, a second side sub-frame, and a second bottom sub-frame that are sequentially connected. Wherein, a first end of the rotating shaft is respectively connected to the first top sub-frame and the second top sub-frame, and a second end of the rotating shaft is respectively connected to the first bottom sub-frame and the second bottom sub-frame. Wherein, the antenna radiator is disposed on the first top sub-frame, and the first parasitic stub is disposed on the second top sub-frame; or, the antenna radiator is disposed on the first side sub-frame, and the first parasitic stub is disposed on the second side sub-frame; or, the antenna radiator is disposed on the first bottom sub-frame, and the first parasitic stub is disposed on the second bottom sub-frame.

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