Antenna module and electronic equipment

Abstract

The utility model relates to an antenna module and electronic equipment, in the antenna module, a first radiation branch is connected with a main radiator through a first gating assembly, and a second radiation branch is connected with the main radiator through a second gating assembly; the first end of the first gating component and the first end of the second gating component are connected in parallel to the first end of the filter inductor, and the second end of the filter inductor is connected with the control unit; when the control unit outputs a low level, the first gating assembly and the second gating assembly are cut off, and the antenna module corresponds to a first working frequency band; when the control unit outputs a high level, the first gating assembly and the second gating assembly are conducted, and the antenna module corresponds to a second working frequency band. Therefore, the main radiating body and the radiating branch are communicated through the gating assembly based on high and low level control, so that whether a path of the main radiating body and the radiating branch is conducted or not is controlled, and different antenna working frequency bands can be selected.

Description

Technical Field

[0001] The present application relates to the field of wireless communication technology, and in particular to an antenna module and electronic equipment. Background Art

[0002] Currently, in various communication modes, antenna devices often need to simultaneously support communications in two frequency bands through a single RF link. However, due to the limitations of the antenna's operating bandwidth, conventional antennas cannot cover both required frequency bands and can only select one. This results in poor antenna impedance in the other frequency band, impacting the user's actual usage experience. Utility Model Content

[0003] The present application provides an antenna module and an electronic device to solve the technical problem of poor antenna frequency band selectivity.

[0004] In a first aspect, the present application provides an antenna module, comprising: a control unit, a filter inductor, a first gating component, a second gating component, a main radiator, a ground branch connected to the main radiator, a first radiating branch, and a second radiating branch;

[0005] The first radiation branch is connected to the main radiator through the first gating component, and the second radiation branch is connected to the main radiator through the second gating component; the first end of the first gating component and the first end of the second gating component are connected in parallel to the first end of the filter inductor, and the second end of the filter inductor is connected to the control unit;

[0006] When the control unit outputs a low level, the first gating component and the second gating component are cut off, and the antenna module corresponds to the first working frequency band; when the control unit outputs a high level, the first gating component and the second gating component are turned on, and the antenna module corresponds to the second working frequency band.

[0007] In one possible embodiment, the first radiation branch is connected to the second end of the first gating component, and the first end of the first gating component is also connected to the first end of the main radiator; the second radiation branch is connected to the second end of the second gating component, and the first end of the second gating component is also connected to the first end of the main radiator.

[0008] In one possible embodiment, the first gating component is a first diode, and the second gating component is a second diode; the first end of the first diode is the positive electrode, and the second end of the first diode is the negative electrode; the first end of the second diode is the positive electrode, and the second end of the second diode is the negative electrode.

[0009] In a possible embodiment, the ground branch has a bending portion, and the length of at least one of the two sides constituting the bending portion is greater than a preset length.

[0010] In a possible implementation manner, the bent portion is U-shaped.

[0011] In a possible implementation manner, the first operating frequency band is higher than the second operating frequency band.

[0012] In a possible implementation manner, the center frequency of the first operating frequency band is 916 MHz, and / or the center frequency of the second operating frequency band is 868 MHz.

[0013] In a possible implementation, a gap exists between any two of the main radiator, the first radiating branch, the second radiating branch, and the ground branch, and a width of the gap is within a preset width range.

[0014] In a possible implementation manner, the distance between the first radiation branch and the second radiation branch is smaller than a preset distance, and the first radiation branch and the second radiation branch correspond to different operating frequencies.

[0015] In a second aspect, the present application provides an electronic device comprising the antenna module described in any one of the first aspects.

[0016] The above-mentioned technical solution provided by the embodiment of the present application has the following advantages compared with the prior art: the antenna module provided by the embodiment of the present application includes: a control unit, a filter inductor, a first gating component, a second gating component, a main radiator, a ground branch connected to the main radiator, a first radiating branch and a second radiating branch; the first radiating branch is connected to the main radiator through the first gating component, and the second radiating branch is connected to the main radiator through the second gating component; the first end of the first gating component and the first end of the second gating component are connected in parallel to the first end of the filter inductor, and the second end of the filter inductor is connected to the control unit; when the control unit outputs a low level, the first gating component and the second gating component are cut off, and the antenna module corresponds to the first operating frequency band; when the control unit outputs a high level, the first gating component and the second gating component are turned on, and the antenna module corresponds to the second operating frequency band. In this way, a gating component is set on the multiple branches branching out from the antenna radiator. The conduction or cutoff of the gating component can be switched by outputting high and low levels, thereby controlling whether the path between the main radiator and the branch is conductive, so as to control the antenna module to operate in different working frequency bands based on different antenna radiation paths, realize the frequency band switching function of the antenna, and facilitate application in various communication modes. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present application and, together with the description, serve to explain the principles of the present application.

[0018] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0019] One or more embodiments are exemplarily illustrated by pictures in the corresponding drawings. These exemplifications do not constitute limitations on the embodiments. Elements with the same reference numerals in the drawings are represented as similar elements. Unless otherwise stated, the figures in the drawings do not constitute proportional limitations.

[0020] Figure 1 A schematic structural diagram of an antenna module provided in an embodiment of the present application;

[0021] Figure 2 A connection diagram of a gating component provided in an embodiment of the present application;

[0022] Figure 3 A schematic structural diagram of an antenna module provided in an embodiment of the present application;

[0023] Figure 4 A schematic diagram of an antenna module and its control circuit provided in an embodiment of the present application;

[0024] Figure 5 A schematic diagram of the overall and local structures of an antenna module provided in an embodiment of the present application;

[0025] Figure 6 A front view of the structure of an antenna module provided in an embodiment of the present application;

[0026] Figure 7 A structural side view of an antenna module provided in an embodiment of the present application.

[0027] Description of Reference Numerals

[0028] 1. Main radiator; 2. First radiating branch; 3. Second radiating branch; 4. First gating component; 5. Second gating component; 6. Ground branch; 7. Control unit; 8. Filter inductor; 9. Bending part. DETAILED DESCRIPTION

[0029] To make the objectives, technical solutions and advantages of the embodiments of the present application clearer, the following will be combined with the accompanying drawings for the embodiments of the present application to make a clear and complete description of the technical solutions in the embodiments of the present application. Obviously, the described embodiments are a part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by a person of ordinary skill in the art without creative work fall within the protection scope of the present application. It should be noted that the embodiments in the present application and the features in the embodiments can be combined with each other without conflict.

[0030] The following disclosure provides many different embodiments or examples for implementing different structures of the present application. For the purpose of simplicity, the description of a particular example in the following will be described. Of course, they are only examples, and the purpose is not to limit the present application. In addition, reference numerals and / or letters can be repeated in different examples in the present application. Such repetition is for the purpose of simplification and clarity, and does not indicate the relationship between the various embodiments and / or settings discussed.

[0031] In order to solve the technical problem of poor frequency band selectivity of the antenna in the prior art, the present application provides an antenna module and an electronic device with the antenna module. By arranging different gating components at different radiation branches, different branch paths can be gated based on the high and low level output of the control unit, so as to switch the antenna between different working frequency bands.

[0032] Figure 1 A structural schematic diagram of an antenna module provided by the present embodiment is shown in Figure 1 The antenna module includes a main radiator 1, a first radiation branch 2, a second radiation branch 3, a first gating component 4, a second gating component 5, a ground branch 6 connected with the main radiator 1, a control unit 7, and a filter inductor 8.

[0033] The first radiation branch 2 is connected with the main radiator 1 through the first gating component 4, and the second radiation branch 3 is connected with the main radiator 1 through the second gating component 5. The first end of the first gating component 4 and the first end of the second gating component 5 are connected in parallel to the first end of the filter inductor 8, and the second end of the filter inductor 8 is connected with the control unit 7.

[0034] When the control unit 7 outputs a low level, the first gating component 4 and the second gating component 5 are cut off, and the antenna module corresponds to a first working frequency band. When the control unit 7 outputs a high level, the first gating component 4 and the second gating component 5 are turned on, and the antenna module corresponds to a second working frequency band.

[0035] In this embodiment, the main radiator 1, the first radiating branch 2, and the second radiating branch 3 may constitute a radiating unit of the antenna, for realizing the radiation communication function of the antenna module. The first radiating branch 2 and the second radiating branch 3 may be two branches on the main radiator 1 extending in different directions.

[0036] In one embodiment, the main radiator 1 can be a strip structure, the first radiating branch 2 can be connected to the bent upward extending structure of the main radiator 1, and the second radiating branch 3 can be connected to the downward extending structure of the main radiator 1, so that the connection of the selection components can be carried out at different positions, which is conducive to wiring.

[0037] In one embodiment, the length of the structure where the main radiator 1 connected to the first radiating branch 2 is bent and extended upward can be 26.75 mm.

[0038] In one embodiment, the structural length of the main radiator 1 connected to the first radiating branch 2 that bends and extends upward may be in the range of [-50%, +50%] of 26.75 mm, that is, 26.75±13.375 mm.

[0039] In one embodiment, in addition to the first radiating branch 2 and the second radiating branch 3, the antenna may also include one or more other radiating branches, which are also connected to the main radiator 1, so that effective radiation can be formed at different frequency points, thereby ensuring the radiation efficiency of the antenna module within a wider frequency band.

[0040] In one embodiment, other radiating branches may also correspond to different operating frequency bands. Other radiating branches may also be connected to the control unit 7 via a gating component, so that the control unit 7 may also control the conduction or cutoff of other radiating branches via the gating component.

[0041] In one embodiment, the control unit 7 may be a general-purpose input / output (GPIO) pin, etc. The control unit 7 may output control signals of different levels to control the switching on or off of the gating component.

[0042] In one embodiment, the main radiator 1 may include a feeding port connected to the RF chip for receiving RF signals. For example, the feeding port may be connected to the RF chip via an RF pin.

[0043] Optionally, a capacitor may be connected in series between the feeding port and the RF chip, and the capacitor may be a DC blocking capacitor for blocking the DC signal sent by the control unit 7. Here, the capacitance value of the capacitor may be greater than or equal to 10 pF.

[0044] In one embodiment, the main radiator 1 may be grounded. For example, a second filter inductor may be connected in series between the main radiator 1 and the ground to isolate the radio frequency signal. Here, the inductance of the second filter inductor may be greater than or equal to 27 nH.

[0045] In one embodiment, the control unit 7 may output a control signal, such as a DC control signal, and the control signal may be a high level or a low level.

[0046] In one embodiment, the first gating component 4 and the second gating component 5 are connected to the control unit 7 via a filter inductor 8. For example, the first end of the first gating component 4 and the first end of the second gating component 5 are connected in parallel to the first end of the filter inductor 8, and the second end of the filter inductor 8 is used to connect to the control unit 7. Here, the filter inductor 8 can be a first filter inductor.

[0047] The filter inductor 8 can be used to isolate radio frequency signals. Here, the inductance of the filter inductor 8 can be greater than or equal to 27 nH. The control unit 7 outputs a high-level or low-level control signal to the first terminal of the first gating component 4 and the first terminal of the second gating component 5, thereby controlling the conduction or cutoff of the first gating component 4 and the second gating component 5.

[0048] In one embodiment, the filter inductor 8 may be an adjustable inductor.

[0049] In one embodiment, the inductance of the filter inductor 8 can be adjusted according to the radio frequency signal.

[0050] In one embodiment, the inductance of the filter inductor 8 can be adjusted according to the first operating frequency band and / or the second operating frequency band.

[0051] In this way, by connecting the control unit 7 via the filter inductor 8, the interference of the radio frequency signal received by the antenna module from the radio frequency chip on the DC control signal of the control unit 7 can be reduced, thereby improving the working efficiency of the antenna module.

[0052] In one embodiment, when the antenna module is not connected to the target terminal, the control unit 7 can periodically alternate between outputting a high level and a low level to control the antenna module to alternately operate in different operating frequency bands. When the antenna module is connected to the target terminal, the control unit 7 can be configured to determine the required operating frequency band based on the communication requirements with the target terminal, and then determine whether to output a high level or a low level.

[0053] In one embodiment, when the control unit 7 outputs a low level, the first gating component 4 and the second gating component 5 are turned off, thereby disconnecting the first radiating branch 2 from the main radiator 1, and disconnecting the second radiating branch 3 from the main radiator 1. At this time, the antenna module operates in the first operating frequency band.

[0054] In one embodiment, when the control unit 7 outputs a high level, the first gating component 4 and the second gating component 5 are turned on, so that the path between the first radiating branch 2 and the main radiator 1 is connected, and the path between the second radiating branch 3 and the main radiator 1 is connected. At this time, the antenna module operates in the second operating frequency band.

[0055] Here, the gating component may be a diode, a transistor, a switch control circuit or other types of gating components. The switch control circuit may be a circuit that adjusts a switch state based on an input level.

[0056] In one embodiment, the difference between the first operating frequency band and the second operating frequency band is greater than a preset threshold. For example, it may mean that the difference between the center frequency of the first operating frequency band and the center frequency of the second operating frequency band is greater than a preset threshold.

[0057] In one embodiment, the first radiation branch 2 is connected to the first end of the main radiator 1 through the first gating component 4. For example, the first radiation branch 2 is connected to the second end of the first gating component 4, and the first end of the main radiator 1 is connected to the first end of the first gating component 4.

[0058] In one embodiment, the second radiation branch 3 is connected to the second end of the main radiator 1 through the second gating component 5. For example, the second radiation branch 3 is connected to the second end of the second gating component 5, and the second end of the main radiator 1 is connected to the first end of the second gating component 5.

[0059] Here, the first end of the main radiator 1 may be an end of a structure of the main radiator 1 that bends and extends upward, and the second end of the main radiator 1 may be an end of a structure of the main radiator 1 that extends downward.

[0060] In one embodiment, the distance between the end of the first radiating branch 2 and the end of the second radiating branch 3 is greater than a preset lower limit value. The end may refer to the end of the radiating branch that is away from the main radiator 1 or away from the gating component, thereby ensuring that the connection wiring between the two gating components and the control unit 7 will not affect each other, which is conducive to the wiring layout.

[0061] In one embodiment, the sizes of the first radiation branch 2 and the second radiation branch 3 can be determined according to the second operating frequency band. The size of the main radiator 1 can be determined according to the first operating frequency band and / or the second operating frequency band.

[0062] In this way, a gating component is set on the multiple branches branching out from the antenna radiator. The conduction or cutoff of the gating component can be switched by outputting high and low levels, thereby controlling whether the path between the main radiator and the branch is conductive, so as to control the antenna module to operate in different working frequency bands based on different antenna radiation paths, realize the frequency band switching function of the antenna, and facilitate application in various communication modes.

[0063] In some embodiments, as Figure 2 As shown, the first gating component 4 is a first diode, and the second gating component 5 is a second diode; the first end of the first diode is the positive electrode, and the second end of the first diode is the negative electrode; the first end of the second diode is the positive electrode, and the second end of the second diode is the negative electrode.

[0064] Here, the gate component is a diode, which is turned on when the anode of the diode is connected to the high level output by the control unit 7, and is turned off when the anode of the diode is connected to the low level output by the control unit 7. Optionally, the diode can be a PN diode.

[0065] In one embodiment, the anode of the first diode is connected to the main radiator 1 and the filter inductor 8 , and the cathode is connected to the first radiating branch 2 ; the anode of the second diode is connected to the main radiator 1 and the filter inductor 8 , and the cathode is connected to the second radiating branch 3 .

[0066] In one embodiment, when the control unit 7 outputs a low level, the positive electrodes of the first diode and the second diode input a low level, the first diode and the second diode are cut off, the path between the first radiation branch 2 and the main radiator 1 is disconnected, and the path between the second radiation branch 3 and the main radiator 1 is disconnected.

[0067] In one embodiment, when the control unit 7 outputs a high level, the positive poles of the first diode and the second diode input a high level, the first diode and the second diode are turned on, the path between the first radiation branch 2 and the main radiator 1 is turned on, and the path between the second radiation branch 3 and the main radiator 1 is turned on.

[0068] In this way, the selection and switching functions of the antenna operating frequency band can be realized through two diodes, which does not occupy a large area, reduces production costs and improves antenna working efficiency.

[0069] In some embodiments, the ground branch 6 has a bending portion 9, and the length of at least one of the two sides constituting the bending portion 9 is greater than a preset length.

[0070] In one embodiment, Figure 3 A schematic diagram of the structure of an antenna module provided in this embodiment is shown in FIG. Figure 3 As shown, the bending portion 9 is U-shaped.

[0071] Here, the ground branch node 6 can be used to connect the metal floor of the antenna module.

[0072] In one embodiment, Figure 3As shown, when the bend 9 is U-shaped, the ground branch 6 extends to the bend 9 to form an L-shaped structure, and the bend 9 extends to the end of the bend 9 to form an inverted L-shaped structure. The L-shaped structure and the inverted L-shaped structure form a U-shaped structure. Here, the end of the bend 9 refers to the end of the second side of the bend 9, and the ground branch 6 constitutes the first side of the bend 9. The first side and the second side can be parallel or at a certain angle.

[0073] In one embodiment, of the two sides constituting the bending portion 9 , the length of the second side located in the inverted L-shaped structure may be 10.55 mm.

[0074] In one embodiment, of the two sides constituting the bending portion 9 , the length of the second side located in the inverted L-shaped structure may be in the range of [-50%, +50%] of 10.55, ie, 10.55±5.275 mm.

[0075] In one embodiment, the bending portion 9 may be located at the end of the ground branch 6. For example, the head end of the ground branch 6 is connected to the main radiator 1, and the end of the ground branch 6 is provided with the bending portion 9.

[0076] In one embodiment, the ground branch 6 may have one or more bending portions 9 , for example, multiple bending portions 9 may be arranged in parallel.

[0077] In one embodiment, the length of at least one of the two sides constituting the bending portion 9 is greater than a preset length, which may refer to the length of the first side and / or the second side being greater than the preset length.

[0078] In one embodiment, the length of at least one of the two sides constituting the bending portion 9 is greater than a preset length, and the length of the first side of the two sides is greater than a preset ratio of the length of the second side.

[0079] In one embodiment, the preset ratio may be within a preset ratio range, such as 50% to 200%.

[0080] Exemplarily, the length of the first side is greater than 150% of the second side, for example, the length of the first side is equal to 200% of the second side.

[0081] In this way, by providing the bent portion 9 and providing sufficient lengths on both sides, the length of the current path is increased, thereby ensuring the radiation efficiency in the low frequency band.

[0082] In one embodiment, the ground branch node 6 may be arranged parallel to the main radiator 1 . For example, the upper end of the ground branch node 6 may be flush with the upper end of the main radiator 1 .

[0083] In one embodiment, the ground branch 6 and the main radiator 1 may be connected via a bending structure. For example, the bending structure may be a part of the main radiator 1 .

[0084] In one embodiment, the ground branch 6 can be connected to the third end of the main radiator 1. Here, the main radiator 1 can be a strip structure, the third end is located at the upper part of the main radiator 1, and the first end and the second end are located at the lower part of the main radiator 1. For example, Figure 2 As shown, the third end of the main radiator 1 is the end of the upper portion of the main radiator 1 and is connected to the ground branch 6 parallel to the main radiator 1. The lower portion of the main radiator 1 has a bifurcated structure, extending from the first and second ends of the main radiator 1. Exemplarily, the first end is the end of the structure where the lower portion of the main radiator 1 bends upward and extends, and the second end is the end of the structure where the lower portion of the main radiator 1 extends downward.

[0085] In one embodiment, the distance between the ground branch node 6 and the main radiator 1 can be within a preset range. For example, the preset range can mean no greater than a preset distance, thereby reducing the occupied space and improving the coupling degree between the ground branch node 6 and the main radiator 1. The distance between the ground branch node 6 and the main radiator 1 can refer to the vertical distance between the parallel ground branch node 6 and the main radiator 1.

[0086] In this way, the antenna radiator is short-circuited with the ground branch 6, which can maintain the antenna radiator in a low-level state, avoiding changes in the level state of the main radiator 1 that affect the on-off state of the selection component, so as to cooperate with the control signal output by the control unit 7 to accurately control the on and off of the two selection components.

[0087] In some embodiments, the first operating frequency band is higher than the second operating frequency band.

[0088] In one embodiment, the difference between the first operating frequency band and the second operating frequency band is greater than a preset threshold. For example, it may mean that the difference between the center frequency of the first operating frequency band and the center frequency of the second operating frequency band is greater than a preset threshold.

[0089] In one embodiment, the first operating frequency band and the second operating frequency band may be corresponding operating frequency bands in a Sub-1G communication mode.

[0090] In one embodiment, the center frequency of the first operating frequency band is 916 MHz, and / or the center frequency of the second operating frequency band is 868 MHz.

[0091] In this way, the two frequency bands with larger spans required for communication modes such as Sub-1G can meet the coverage and switching of different working frequency bands, and have the same radiation efficiency in different frequency bands.

[0092] In some embodiments, there is a gap between any two of the main radiator 1 , the first radiating branch 2 , the second radiating branch 3 and the ground branch 6 , and the width of the gap is within a preset width range.

[0093] Here, the first radiation branch 2, the second radiation branch 3 and the ground branch 6 are respectively connected to structures of the main radiator 1 in different extending directions, and there are gaps between each part.

[0094] In one embodiment, the preset width range may be 1 to 5 mm.

[0095] For example, the width of the gap between the first radiation branch 2 and the ground branch 6 may be 1.6 mm.

[0096] In one embodiment, the main radiator 1, the first radiating branch 2, the second radiating branch 3 and the ground branch 6 form a coupling structure based on the gap. Being within a preset width range may refer to being within a preset width range that produces optimal coupling performance.

[0097] In this way, the gaps between the multiple branches introduce capacitive coupling, thereby neutralizing the inductance of the antenna input impedance and improving the impedance matching characteristics of the antenna.

[0098] In some embodiments, the distance between at least one of the main radiator 1 , the first radiating branch 2 , and the second radiating branch 3 and the ground branch 6 is less than a preset distance.

[0099] In one embodiment, the distance between the first radiation branch 2 and the second radiation branch 3 is less than a preset distance, and the first radiation branch 2 and the second radiation branch 3 correspond to different operating frequencies.

[0100] Here, in one embodiment, the preset distance may include a first preset distance, a second preset distance, and a third preset distance.

[0101] In one embodiment, the distance between the first radiation branch 2 and the second radiation branch 3 may refer to the distance between the center point of the first radiation branch 2 and the center point of the second radiation branch 3 .

[0102] In this way, since the distances between branches corresponding to different operating frequencies are relatively close, effective radiation is formed at different frequency points, thereby ensuring the radiation efficiency of the antenna module within a wider frequency band and expanding the bandwidth of the antenna module.

[0103] In one embodiment, the distance between the ground branch node 6 and the main radiator 1 may refer to the distance between the first side of the ground branch node 6 connected to the main radiator 1 and the main radiator 1. The distance between the ground branch node 6 and the main radiator 1 may be less than the first preset distance.

[0104] In one embodiment, the distance between the ground branch 6 and the first radiating branch 2 can refer to the distance between the end of the ground branch 6 and the second end of the first radiating branch 2. Here, the end of the ground branch 6 can also refer to the end of the bending part 9. The distance between the ground branch 6 and the first radiating branch 2 can be less than the second preset distance.

[0105] In one embodiment, the distance between the ground branch 6 and the second radiating branch 3 can refer to the distance between the end of the ground branch 6 and the second end of the second radiating branch 3, or can also refer to the distance between the bending part 9 and the second end of the second radiating branch 3. For example, the distance between the end of the bending part 9 and the end of the second radiating branch 3 can refer to the distance between the midpoint of the bending part 9 and the second end of the second radiating branch 3. The distance between the ground branch 6 and the second radiating branch 3 can be less than the third preset distance.

[0106] In one embodiment, the first preset distance can be equal to or less than the third preset distance, and the second preset distance can be greater than the first preset distance and the third preset distance.

[0107] In this way, the ground branch 6 and the radiating unit of the antenna module form a coupling structure, introduce a parasitic capacitance, neutralize the inductance of the low-frequency antenna module, improve the impedance matching characteristics of the antenna module, and thus optimize the antenna bandwidth.

[0108] As a possible implementation, as shown in Figure 4 , an electrically adjustable frequency adaptive antenna is provided, which has the following characteristics:

[0109] Frequency adaptation: the adaptive adjustment of the working frequency of the antenna is achieved by means of electrical adjustment;

[0110] Good passive characteristics: high radiation efficiency in both working frequency bands;

[0111] Low cost: the electrically adjustable effect is realized by using a cheap PN diode in combination with a GPIO control pin.

[0112] Specifically: the antenna and the ground are connected in series through a filter inductance above the antenna radiator. There are two states, state 1: the GPIO is at a low level, and the antenna works at 916MHz frequency band; state 2: the GPIO is at a high level, and the antenna works at 868MHz frequency band. During the period when the antenna is not connected to the terminal, the level of the GPIO is controlled to poll 868MHz and 916MHz. When the target device is detected, the working state of the antenna is locked. In this way, the working frequency band of the antenna will be switched between 868MHz and 916MHz according to the GPIO control signal, and the antenna is well matched in the two working states.

[0113] As shown in Figure 5 , the antenna is connected to the ground through a lead, and a filter inductance is connected in series between the antenna and the ground. Figure 4The antenna in Figure 1 is locally amplified at three locations. At position a, a curved trace shorts the antenna radiator to the ground branch, creating a short-circuit antenna. This technically enables the antenna radiator to maintain a low-level state, enabling it to work in conjunction with the GPIO control signal, thereby controlling the conduction and disconnection of PN diode #1 (the first diode) and PN diode #2 (the second diode).

[0114] At position b, the antenna branch is bent into an inverted L shape, which increases the current path and ensures radiation efficiency in the low frequency band.

[0115] At position c, the ground branch and the main radiating branch of the antenna form a coupling structure, introducing parasitic capacitance, neutralizing the inductance of the low-frequency antenna, improving the impedance matching characteristics of the antenna, and optimizing the antenna bandwidth.

[0116] At positions b and d, the antenna is connected to the first radiation branch 2, the second radiation branch 3 and the ground branch 6 at different ends to form extensions in different directions, presenting a multi-branch shape, which can form effective radiation at different frequency points and ensure the radiation efficiency of the antenna within a wider frequency band.

[0117] like Figure 6 and Figure 7 The following figures show the front and side views of the antenna. Preferably, the substrate is made of 1.6mm thick flame-retardant FR-4. The center frequencies in the two operating states are 868MHz and 916MHz, respectively. Optionally, the size range can be adjusted between 30% and 200% depending on the target frequency.

[0118] In one embodiment, an electronic device is further provided, comprising the antenna module described in any one or more of the aforementioned embodiments.

[0119] It should be understood that the terms used herein are for the purpose of describing specific example embodiments only and are not intended to be limiting. Unless the context clearly indicates otherwise, the singular forms "one", "an" and "said" as used herein may also be meant to include plural forms. The terms "comprise", "include", "contain" and "have" are inclusive and therefore specify the presence of stated features, steps, operations, elements and / or parts, but do not exclude the presence or addition of one or more other features, steps, operations, elements, parts, and / or combinations thereof. The method steps, processes, and operations described herein are not to be construed as necessarily requiring them to be performed in the specific order described or illustrated, unless the order of execution is clearly indicated. It should also be understood that additional or alternative steps may be used.

[0120] In the absence of contradiction, each step in a certain embodiment or example can be implemented as an independent embodiment, and the steps can be arbitrarily combined. For example, a solution after removing some steps in a certain embodiment or example can also be implemented as an independent embodiment, and the order of the steps in a certain embodiment or example can be arbitrarily exchanged. In addition, the optional methods or optional examples in a certain embodiment or example can be arbitrarily combined; in addition, the various embodiments or examples can be arbitrarily combined. For example, some or all steps of different embodiments or examples can be arbitrarily combined, and a certain embodiment or example can be arbitrarily combined with the optional methods or optional examples of other embodiments or examples.

[0121] The foregoing is merely a list of specific embodiments of the present application, intended to enable those skilled in the art to understand or implement the present application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application is not limited to the embodiments shown herein, but is intended to conform to the broadest scope consistent with the principles and novel features of the present application.

Claims

1. An antenna module, characterized in that: The antenna module includes: a control unit, a filter inductor, a first gating component, a second gating component, a main radiator, a ground branch connected to the main radiator, a first radiating branch, and a second radiating branch; The first radiation branch is connected to the main radiator through the first gating component, and the second radiation branch is connected to the main radiator through the second gating component; the first end of the first gating component and the first end of the second gating component are connected in parallel to the first end of the filter inductor, and the second end of the filter inductor is connected to the control unit; When the control unit outputs a low level, the first gating component and the second gating component are cut off, and the antenna module corresponds to the first working frequency band; when the control unit outputs a high level, the first gating component and the second gating component are turned on, and the antenna module corresponds to the second working frequency band.

2. The antenna module according to claim 1, wherein: The first radiation branch is connected to the second end of the first gating component, and the first end of the first gating component is also connected to the first end of the main radiator; the second radiation branch is connected to the second end of the second gating component, and the first end of the second gating component is also connected to the first end of the main radiator.

3. The antenna module according to claim 2, wherein: The first gating component is a first diode, and the second gating component is a second diode; the first end of the first diode is a positive electrode, and the second end of the first diode is a negative electrode; the first end of the second diode is a positive electrode, and the second end of the second diode is a negative electrode.

4. The antenna module according to claim 1, wherein: The ground branch node has a bending portion, and the length of at least one of the two sides constituting the bending portion is greater than a preset length.

5. The antenna module according to claim 4, wherein: The bent portion is U-shaped.

6. The antenna module according to claim 1, wherein: The first operating frequency band is higher than the second operating frequency band.

7. The antenna module according to claim 6, wherein: The center frequency of the first operating frequency band is 916 MHz, and / or the center frequency of the second operating frequency band is 868 MHz.

8. The antenna module according to claim 1, wherein: There is a gap between any two of the main radiator, the first radiating branch, the second radiating branch, and the ground branch, and the width of the gap is within a preset width range.

9. The antenna module according to claim 1, wherein: The distance between the first radiation branch and the second radiation branch is smaller than a preset distance, and the first radiation branch and the second radiation branch correspond to different operating frequencies.

10. An electronic device, characterized in that: The electronic device comprises the antenna module according to any one of claims 1 to 9.

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