Antenna module and terminal equipment

Abstract

The invention relates to an antenna module and terminal equipment. The antenna module comprises an antenna radiator which is provided with a first position area and a second position area; the first position area is an area formed by a position where the current intensity lower than a first current threshold value is located when the antenna radiator works in a first frequency band, and the second position area is an area formed by a position where the current intensity higher than a second current threshold value is located when the antenna radiator works in a second frequency band; the first upper frame point is located in a first overlapping area of the first position area and the second position area; the first tuning module is electrically connected with the first upper frame point; wherein when the first tuning module adjusts the antenna radiator to work in the first frequency band, the center frequency of the higher harmonic generated by the antenna radiator is located in the second frequency band. According to the antenna module, the first upper frame point and the first tuning module are arranged, so that the antenna module works in the second frequency band based on higher harmonics when working in the first frequency band, the integration level of multiple frequency bands is improved, and the structure is simplified.

Description

Technical Field

[0001] The present disclosure relates to the field of mobile terminal antennas, and particularly to an antenna module and a terminal device. Background Art

[0002] Currently, the design of terminal devices is becoming more and more extreme. In order to provide users with a better signal experience, more and more terminal devices have added Bluetooth antennas / Wireless Fidelity (WIFI) antennas. At present, to implement the functions of Bluetooth / WIFI antennas, an additional antenna is usually added in a terminal device, so that the antenna independently operates within the working frequency band corresponding to the Bluetooth / WIFI antenna.

[0003] However, the additional setting of Bluetooth / WIFI antennas occupies more structural space of the terminal device, resulting in an increase in the structural size of the terminal device, which has an adverse impact on the current demand of terminal devices for thin and light sizes; moreover, the design of adding an additional antenna also greatly increases the structural cost. Summary of the Invention

[0004] To overcome the problems existing in the related art, the present disclosure provides an antenna module and a terminal device. In the antenna module proposed by the present disclosure, by setting a first upper frame point and a first tuning module, the antenna module operates in a second frequency band based on high-order harmonics when operating in a first frequency band, improving the integration of multiple frequency bands and simplifying the structure.

[0005] In a first aspect of an embodiment of the present disclosure, an antenna module is proposed, and the antenna module includes:

[0006] An antenna radiator having a first position area and a second position area; the first position area is an area formed by the positions where the current intensity of the antenna radiator is lower than a first current threshold when operating in a first frequency band, and the second position area is an area formed by the positions where the current intensity of the antenna radiator is higher than a second current threshold when operating in a second frequency band;

[0007] A first upper frame point located in a first overlapping area of the first position area and the second position area;

[0008] A first tuning module electrically connected to the first upper frame point;

[0009] Wherein, when the first tuning module adjusts the antenna radiator to operate in the first frequency band, the center frequency of the high-order harmonics generated by the antenna radiator is located within the second frequency band.

[0010] In some embodiments, the first minimum position where the minimum value of the current intensity of the antenna radiator is located when operating in the first frequency band is within the first overlapping region, and the first upper frame point is located at the first minimum position;

[0011] Or,

[0012] The first maximum position where the maximum value of the current intensity of the antenna radiator is located when operating in the second frequency band is within the first overlapping region, and the first upper frame point is located at the first maximum position.

[0013] In some embodiments, the antenna radiator further has a third position region and a fourth position region; the third position region is a region formed by the positions where the current intensity of the antenna radiator is higher than the first current threshold when operating in the first frequency band, and the fourth position region is a region formed by the positions where the current intensity of the antenna radiator is lower than the second current threshold when operating in the second frequency band;

[0014] The antenna module further includes:

[0015] A second upper frame point, located in the second overlapping region of the third position region and the fourth position region;

[0016] A second tuning module, electrically connected to the second upper frame point and configured to adjust the center frequency of the high-order harmonic to a target frequency within the second frequency band.

[0017] In some embodiments, the second maximum position where the maximum value of the current intensity of the antenna radiator is located when operating in the first frequency band is within the second overlapping region, and the second upper frame point is located at the second maximum position;

[0018] Or,

[0019] The second minimum position where the minimum value of the current intensity of the antenna radiator is located when operating in the second frequency band is within the second overlapping region, and the second upper frame point is located at the second minimum position.

[0020] In some embodiments, the second tuning module includes a tuning component;

[0021] The tuning component includes a tuning resistor, a tuning capacitor, and / or a tuning inductor.

[0022] In some embodiments, the antenna radiator further has a feeding point, and the second upper frame point is located between the feeding point and the first upper frame point.

[0023] In some embodiments, the antenna radiator includes a first branch and a second branch connected to the first branch and having an angle with the first branch;

[0024] The feeding point is located on the first stub.

[0025] The first upper frame point is located on the second stub.

[0026] The second upper frame point is located at the connection position between the first stub and the second stub.

[0027] In some embodiments, the first frequency band includes a plurality of sub - frequency bands; the first tuning module has a variable impedance component;

[0028] When the impedance of the variable impedance component is different, the antenna radiator operates in different sub - frequency bands.

[0029] In some embodiments, the variable impedance component includes a switching component.

[0030] In some embodiments, the first frequency band is between 0.6 GHz and 1 GHz, and the second frequency band is between 2.3 GHz and 2.5 GHz.

[0031] In some embodiments, the shape of the antenna radiator is T - shaped or L - shaped.

[0032] In some embodiments, the antenna radiator includes a monopole antenna, and the high - order harmonic is the third - order harmonic generated when the antenna radiator operates in the first frequency band.

[0033] In a second aspect of the embodiments of the present disclosure, there is provided a terminal device, which includes:

[0034] The antenna module described in the first aspect of the above embodiments of the present disclosure;

[0035] A conductive frame, reused as the antenna radiator in the antenna module.

[0036] In some embodiments, the terminal device further includes:

[0037] A universal serial bus (USB) port;

[0038] The antenna radiator is disposed at the position of the USB port, and the distance between the first upper frame point of the antenna module and the USB port is less than the distance between the second upper frame point of the antenna module and the USB port.

[0039] The technical solutions provided by the embodiments of the present disclosure may include the following beneficial effects:

[0040] In the antenna module proposed in the embodiments of the present disclosure, a first tuning module is provided, and the first upper frame point of the first tuning module is set in an area where the current intensity of the antenna radiator is high when operating in the first frequency band and low when operating in the second frequency band. Thus, when the first tuning module adjusts the antenna radiator to operate in the first frequency band, the center frequency of the high-order harmonics generated by the antenna radiator is located within the second frequency band. In this way, the present disclosure uses one antenna radiator and one tuning module to not only adjust the resonance frequency of the antenna radiator when operating in the first frequency band but also effectively control the high-order harmonics to fall into the second frequency band, improving the integration of multiple frequency bands. Moreover, compared with the antenna module that sets two upper frame points to be electrically connected to two tuning switches respectively to adjust the first frequency band and the second frequency band, the present disclosure simplifies the antenna structure, saves the structural cost, and further improves the practicability of the antenna module. In addition, since the first tuning module is set at a position where the current intensity of the antenna radiator is low when operating in the second frequency band, the change in the center frequency of the high-order harmonics during the tuning process is small and more stable, thereby improving the performance of the antenna module for carrier aggregation.

[0041] It should be understood that the above general description and the following detailed description are only exemplary and explanatory, and cannot limit the present disclosure. BRIEF DESCRIPTION OF THE DRAWINGS

[0042] The accompanying drawings herein are incorporated into the specification and constitute a part of the specification, showing embodiments consistent with the present disclosure and used together with the specification to explain the principles of the present disclosure.

[0043] Figure 1 is a schematic structural diagram of an antenna module shown according to an exemplary embodiment;

[0044] Figure 2 is a schematic diagram of a wireless communication scenario applied to a terminal device shown according to an exemplary embodiment;

[0045] Figure 3a is a schematic diagram of the current distribution when the antenna radiator operates in the first frequency band shown according to an exemplary embodiment Figure 1 ;

[0046] Figure 3b is a schematic diagram of the current distribution when the antenna radiator operates in the second frequency band shown according to an exemplary embodiment Figure 1 ;

[0047] Figure 4a is a schematic diagram of the current distribution when the antenna radiator operates in the first frequency band shown according to an exemplary embodiment Figure 2 ;

[0048] Figure 4b is a schematic diagram of the current distribution when the antenna radiator operates in the second frequency band shown according to an exemplary embodimentFigure 2 ;

[0049] Figure 5 It is a schematic diagram of the performance of an antenna module for transmitting and receiving wireless signals shown according to an exemplary embodiment. Figure 1 ;

[0050] Figure 6 It is a schematic diagram of the performance of an antenna module for transmitting and receiving wireless signals shown according to an exemplary embodiment. Figure 2 ;

[0051] Figure 7 It is a schematic connection diagram of an antenna radiator, a tuning switch, and a tuning capacitor shown according to an exemplary embodiment;

[0052] Figure 8 It is a schematic diagram of a current mode of an antenna radiator shown according to an exemplary embodiment;

[0053] Figure 9 It is a schematic diagram of the system efficiency of an antenna module for transmitting and receiving wireless signals shown according to an exemplary embodiment;

[0054] Figure 10 It is a block diagram of a terminal device shown according to an exemplary embodiment. Detailed implementation manners

[0055] Here, the exemplary embodiments will be described in detail, and the examples are shown in the drawings. When the following description refers to the drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements. The implementation manners described in the following exemplary embodiments do not represent all implementation manners consistent with the present disclosure. On the contrary, they are merely examples of devices and methods consistent with some aspects of the present disclosure as detailed in the appended claims.

[0056] Refer to Figure 1 , Figure 1 It is a schematic diagram of the structure of an antenna module shown according to an exemplary embodiment; as Figure 1 shown, the present disclosure provides an antenna module, and the antenna module at least includes:

[0057] An antenna radiator 1, having a first position area S1 and a second position area S2; the first position area S1 is an area formed by the position where the current intensity of the antenna radiator 1 is lower than the first current threshold when operating in the first frequency band, and the second position area S2 is an area formed by the position where the current intensity of the antenna radiator 1 is higher than the second current threshold when operating in the second frequency band;

[0058] A first upper frame point 2, located in the first overlapping area of the first position area S1 and the second position area S2;

[0059] The first tuning module 3 is electrically connected to the first upper frame point 2;

[0060] Wherein, when the first tuning module 3 adjusts the antenna radiator 1 to operate in the first frequency band, the center frequency of the high-order harmonics generated by the antenna radiator 1 is within the second frequency band.

[0061] Here, the antenna module provided by the present disclosure is disposed in a terminal device, and the terminal device includes a mobile phone, a tablet computer, etc.; the antenna module performs wireless signal transmission and reception in the terminal device; specifically, when the above antenna module is used to transmit a wireless signal, the terminal device can perform wireless signal transmission, such as wireless communication, positioning, or charging, etc.

[0062] The terminal device where the antenna module provided by the embodiments of the present disclosure is active in an actual wireless communication scenario. Exemplarily, the wireless communication scenario can be a multi-device scenario. For example, in a scenario of configuring a network for a smart device, through multi-machine interaction such as a router, different terminal devices, etc., the network configuration for the smart device is completed.

[0063] See Figure 2 , Figure 2 is a schematic diagram of a wireless communication scenario applied to a terminal device shown according to an exemplary embodiment; the wireless communication network environment includes: terminal devices 201A and 201B, a WIFI access point 202, a cellular base station 203, and a network 204. Here, when the terminal devices 201A and 201B use a wireless local area network or a cellular network to transmit and receive wireless signals, they can perform the switching between WIFI and the cellular network through the information transmission between the WIFI access point 202 and the cellular base station 203 and the network 204. According to the network environment provided by the present disclosure as Figure 2 shown, when receiving an instruction for the cellular circuit to perform wireless transmission, the WIFI connection is stopped; when receiving an instruction to stop the cellular circuit from performing wireless transmission, the WIFI connection is restored.

[0064] The antenna radiator proposed by the embodiments of the present disclosure can be disposed on the frame, back cover, or middle frame of the terminal device, or can be disposed between the back cover and the middle frame, or between the middle frame and the display screen, etc.; here, the antenna radiator can be formed as a frame antenna, or can be formed as a patch antenna or a cavity antenna, etc., and the present disclosure does not limit this.

[0065] Here, the antenna radiator operating in the first frequency band means that the resonant frequency of the radio electromagnetic wave signal (abbreviated as wireless signal) transmitted and received by the antenna radiator is within the first frequency band; the antenna radiator operating in the second frequency band means that the resonant frequency of the wireless signal transmitted and received by the antenna radiator is within the second frequency band.

[0066] It should be noted that in the embodiments of the present disclosure, when the antenna radiator operates in the first frequency band, high-order harmonics can be generated, and the resonance frequencies of at least one order of high-order harmonics can fall within the second frequency band, so that the antenna radiator operates in the second frequency band; here, the frequencies in the second frequency band in the present disclosure are greater than the frequencies in the first frequency band.

[0067] In the embodiments of the present disclosure, when the antenna radiator operates in the first frequency band and the second frequency band, there are differences in the current intensity (or electric field intensity) distributed at different positions of the antenna radiator. Refer to Figure 3a and Figure 3b ; Figure 3a is a schematic diagram of the current distribution when the antenna radiator operates in the first frequency band shown according to an exemplary embodiment Figure 1 ; Figure 3b is a schematic diagram of the current distribution when the antenna radiator operates in the second frequency band shown according to an exemplary embodiment Figure 1 ; Figure 3a and Figure 3b In, the arrow direction indicates the direction of current flow. Here, Figure 3a shows the first position area S1 when the antenna radiator operates in the first frequency band; Figure 3b shows the second position area S2 when the antenna radiator operates in the second frequency band.

[0068] Here, the first current threshold and the second current threshold may be the same or different; the present disclosure does not limit this; the first current threshold and the second current threshold may be preset or dynamically adjusted. Exemplarily, the first current threshold may be the average value of the current intensities at each position when the antenna radiator operates in the first frequency band, or 1.5 times the average value of the current intensities at each position when the antenna radiator operates in the first frequency band; the second current threshold may be the average value of the current intensities at each position when the antenna radiator operates in the second frequency band, or 1.5 times the average value of the current intensities at each position when the antenna radiator operates in the second frequency band.

[0069] It should be noted that since the electric field intensity is low at the position with high current intensity and the tuning effect is poor, while the electric field intensity is high at the position with low current intensity and the tuning effect is good, the first upper frame point is set in the first position area with low current intensity in the embodiments of the present disclosure, and the first tuning module is arranged to be electrically connected to the first upper frame point, so that under the action of the first tuning module, the resonance frequency of the wireless signal received and transmitted by the antenna radiator can be switched within the first frequency band.

[0070] It should also be noted that if the upper frame point of the first tuning module is not in the second position area, the first tuning module is distributed at a position where the current intensity of the antenna radiator is low when operating in the second frequency band, resulting in the resonant frequencies of the high-order harmonics being discretely within the third frequency band. Here, the third frequency band includes the second frequency band, and the current intensity and current direction of the antenna radiator when operating in the third frequency band are the same as those of the antenna radiator when operating in the second frequency band. At this time, since the resonant frequencies for receiving and transmitting wireless signals in the first frequency band and the resonant frequencies for generating high-order harmonics will change synchronously, the performance of the antenna radiator for carrier aggregation is poor; moreover, the resonant frequencies corresponding to some high-order harmonics interfere with the normal signal reception and transmission of the antenna module, having an adverse impact on the communication performance of the antenna module.

[0071] Therefore, since the present disclosure sets the first upper frame point in the first overlapping area, when the first tuning module switches the antenna radiator to receive and transmit wireless signals of different frequencies within the first frequency band, the center frequencies (resonant frequencies) of the high-order harmonics generated by these different frequency wireless signals are more stable, so that the resonant frequencies of the high-order harmonics more concentratedly fall within the second frequency band whose frequency band range is smaller than the above-mentioned third frequency band.

[0072] In the embodiment of the present disclosure, the first tuning module includes a tuning circuit, and tuning components are arranged in the tuning circuit; by adjusting the conduction relationship or impedance of the tuning components in the tuning circuit, the resonant frequency of the wireless signal received and transmitted by the antenna radiator changes within the first frequency band.

[0073] In the antenna module proposed in the embodiment of the present disclosure, a first tuning module is provided, and the first upper frame point of the first tuning module is set in an area where the current intensity of the antenna radiator is high when operating in the first frequency band and the current intensity is low when operating in the second frequency band. Thus, when the first tuning module adjusts the antenna radiator to operate in the first frequency band, the center frequency of the high-order harmonics generated by the antenna radiator is located within the second frequency band; in this way, the present disclosure uses one antenna radiator and one tuning module to not only realize the adjustment of the resonant frequency of the antenna radiator when operating in the first frequency band, but also effectively control the high-order harmonics to fall within the second frequency band, improving the integration of multiple frequency bands; moreover, compared with the antenna module having two upper frame points respectively electrically connected to two tuning switches to adjust the first frequency band and the second frequency band, the present disclosure simplifies the antenna structure, saves the structural cost, and further improves the practicability of the antenna module; and, since the first tuning module is set at a position where the current intensity of the antenna radiator is low when operating in the second frequency band, the change of the center frequency of the high-order harmonics during the tuning process is smaller and more stable, thereby improving the performance of the antenna module for carrier aggregation.

[0074] In some embodiments, the first frequency band includes multiple sub-frequency bands; the first tuning module has a variable impedance component;

[0075] When the impedance of the variable impedance component is different, the antenna radiator operates in different sub-bands.

[0076] In the embodiments of the present disclosure, the first frequency band includes multiple sub-bands, and the multiple sub-bands may partially overlap or not overlap with each other, which is not limited in the present disclosure. Exemplarily, the first frequency band may be between 0.6 GHz and 1.7 GHz; here, the multiple sub-bands include the 703 MHz to 748 MHz band, the 758 MHz to 803 MHz band, and the 880 MHz to 915 MHz band; other sub-bands may also be included in the multiple sub-bands, which will not be elaborated herein in the present disclosure.

[0077] In the present disclosure, a variable impedance component is provided in the first tuning module. When the variable impedance component is adjusted, the output impedance changes accordingly, so that the overall output impedance of the first tuning module changes, thereby changing the effective electrical radiation length of the antenna radiator; thus, the antenna radiator operates in different sub-bands and receives and transmits wireless signals corresponding to different sub-bands.

[0078] Here, the variable impedance component may be a variable capacitor, a variable inductor or a variable resistor, or may be formed by a combination of two or three of the above components, which is not further limited in the embodiments of the present disclosure.

[0079] The variable impedance component of the embodiments of the present disclosure includes any one or any combination of a variable capacitor, a variable inductor or a variable resistor, and can enable the output impedance to be continuously adjusted within a preset range; thus, by adjusting the variable impedance component, the antenna module operates at multiple sub-frequencies within the first frequency band, improving the tuning flexibility, and thus better improving and optimizing the signal receiving and transmitting performance of the antenna radiator.

[0080] In some embodiments, the variable impedance component includes a switch component.

[0081] Here, the switch component may be a multi-pole multi-throw mechanical switch or a digital logic control switch, which is not limited in the present disclosure.

[0082] In the present disclosure, the variable impedance component further includes tuning components; the tuning components include at least one of an inductor, a capacitor or a resistor; in the present disclosure, different connection ends of the switch component are respectively connected to different circuit branches, and at least one of an inductor, a capacitor or a resistor is provided on different circuit branches, and the overall impedance of different circuit branches is different; when the switch component connects different circuit branches, the overall output impedance of the variable impedance component is different, so that the effective electrical radiation length of the antenna radiator is different, and further the resonant frequency of the wireless signal received and transmitted by the antenna radiator falls into different sub-bands.

[0083] In the present disclosure, by providing a switching component in the first tuning module, the flexibility and convenience of tuning the radiation of the first frequency band by the antenna radiator are improved.

[0084] In some embodiments, the antenna radiator includes a monopole antenna, and the high-order harmonic is the third harmonic generated when the antenna radiator operates in the first frequency band.

[0085] Here, the monopole antenna is a vertical antenna with a quarter-wavelength. The monopole antenna radiates radio electromagnetic wave signals. The fed-in current generates a radiation magnetic field and a radiation electric field through the monopole antenna, and the radiation electric field and the radiation magnetic field interact to form the radiation of the electromagnetic wave. The above monopole antenna can be a whip antenna, a helical antenna, an umbrella antenna, a mast radiator, an inverted L-shaped antenna, a T-shaped antenna, a ground plane, a folded monopole antenna, an inverted F-shaped antenna, etc., and the present disclosure does not limit this here.

[0086] In the present disclosure, the monopole antenna can operate in the 1 / 4-wavelength mode, that is, the effective electrical radiation length of the monopole antenna is 1 / 4 wavelength. At this time, the resonant frequency of the radio signal received and transmitted by the monopole antenna corresponds to this wavelength. The first tuning module provided in the embodiments of the present disclosure can adjust the effective electrical radiation length of the monopole antenna, so that the resonant frequency of the radio signal received and transmitted by the monopole antenna is continuously adjustable within the first frequency band.

[0087] It should be noted that when the antenna radiator receives and transmits radio signals corresponding to the first frequency band, high-order harmonics of three times the frequency will be continuously generated. Here, the high-order harmonics proposed in the present disclosure can be third harmonics. At this time, the antenna radiator operates in the 3 / 4-wavelength mode. Combining Figure 3a and Figure 3b , Figure 3a shows the current state of the monopole antenna operating in the 1 / 4-wavelength mode; Figure 3b shows the current state of the monopole antenna operating in the 3 / 4-wavelength mode.

[0088] In other embodiments, when the antenna radiator operates in the first frequency band, higher-order high-order harmonics can also be generated; for example, fifth harmonics, seventh harmonics, ninth harmonics, etc. Here, taking the high-order harmonics as fifth harmonics as an example, the antenna radiator operates in the 5 / 4-wavelength mode. At this time, the first upper frame point is also located at the position where the current intensity of the antenna radiator operating in the 5 / 4-wavelength mode is high.

[0089] The embodiments of the present disclosure effectively utilize the third harmonics generated by the radio signals received and transmitted by the monopole antenna when operating in the first frequency band, so that the antenna radiator integrates the first frequency band and the second frequency band, and improves the multi-frequency integration degree of the antenna module.

[0090] In some embodiments, when the antenna radiator operates in the first frequency band, the first minimum position where the minimum value of the current intensity is located is within the first overlapping region, and the first upper frame point is located at the first minimum position;

[0091] Or,

[0092] When the antenna radiator operates in the second frequency band, the first maximum position where the maximum value of the current intensity is located is within the first overlapping region, and the first upper frame point is located at the first maximum position.

[0093] In the present disclosure, refer to Figure 4a and Figure 4b ; Figure 4a is a schematic diagram of the current distribution when the antenna radiator operates in the first frequency band shown according to an exemplary embodiment Figure 2 ; Figure 4b is a schematic diagram of the current distribution when the antenna radiator operates in the second frequency band shown according to an exemplary embodiment Figure 2 ; Figure 4a and Figure 4b In, the arrow direction indicates the direction of current flow. Here, Figure 4a shows the first minimum position (such as A1) of the current intensity when the antenna radiator 1 operates in the first frequency band; Figure 4b shows the first maximum position (such as A2) of the current intensity when the antenna radiator 1 operates in the second frequency band.

[0094] In the present disclosure, since the electric field intensity is high at the position where the current intensity is low and the tuning effect is good, when the first minimum position where the minimum value of the current intensity is located when the antenna radiator operates in the first frequency band is within the first overlapping region, setting the first tuning module at the above-mentioned first minimum position can better improve the tuning effect for multiple sub-bands within the first frequency band of the antenna radiator and improve the performance of the antenna module in receiving and transmitting wireless signals.

[0095] Since the electric field intensity is low at the position where the current intensity is high and the tuning effect is poor, when the first maximum position where the maximum value of the current intensity is located when the antenna radiator operates in the second frequency band is within the first overlapping region, setting the first tuning module at the above-mentioned first maximum position can, when adjusting multiple sub-bands of the antenna radiator operating in the first frequency band, reduce the degree of change in the resonance frequency of the high-order harmonics generated by the wireless signals corresponding to different frequencies of the multiple sub-bands, avoid the scattered distribution of the resonance frequencies of the multiple high-order harmonics in the third frequency band, and make the resonance frequencies of the high-order harmonics fall within the second frequency band whose range is smaller than the above-mentioned third frequency band, thereby further improving the carrier aggregation characteristic of the antenna module.

[0096] It should be noted that in the present disclosure, the above-mentioned first maximum position and the above-mentioned first minimum position may be located at the same position or at different positions; in combination withFigure 4a and Figure 4b The first upper frame point 2, the first minimum position A1, and the second maximum position A2 are set at the same position.

[0097] In some embodiments, the antenna radiator further has a third position region and a fourth position region; the third position region is a region formed by the positions where the current intensity of the antenna radiator is higher than the first current threshold when operating in the first frequency band, and the fourth position region is a region formed by the positions where the current intensity of the antenna radiator is lower than the second current threshold when operating in the second frequency band; the above antenna module further includes:

[0098] A second upper frame point, located in the second overlapping region of the third position region and the fourth position region;

[0099] A second tuning module, electrically connected to the second upper frame point, and configured to adjust the center frequency of the high-order harmonics to a target frequency within the second frequency band.

[0100] Here, Figure 3a The first position region S1 and the third position region S3 when the antenna radiator operates in the first frequency band are shown; the third position region is a region formed by the positions where the current intensity of the antenna radiator is higher than the first current threshold when operating in the first frequency band. Figure 3b The second position region S2 and the fourth position region S4 when the antenna radiator operates in the second frequency band are shown; the fourth position region is a region formed by the positions where the current intensity of the antenna radiator is lower than the second current threshold when operating in the second frequency band, in combination with Figure 3a and Figure 3b it can be seen that the second upper frame point 4 is located in the second overlapping region of the third position region S3 and the fourth position region S4, and the second tuning module 5 is electrically connected to the second upper frame point 4.

[0101] Since the electric field intensity is low at the position with high current intensity and the tuning effect is poor, while the electric field intensity is high at the position with low current intensity and the tuning effect is good, therefore, in the embodiments of the present disclosure, the second upper frame point is set in the third position region with high current intensity and the second overlapping region of the fourth position region with low current intensity, and the second tuning module is set to be electrically connected to the first upper frame point; on the one hand, the second tuning module has a small influence on the effective electrical radiation length of the antenna radiator for receiving and transmitting wireless signals in the first frequency band during the tuning process, so as to be able to stabilize the antenna performance of the antenna radiator when operating in the first frequency band; on the other hand, during the tuning process of the second tuning module, the tuning effect on the high-order harmonics generated when the antenna radiator operates in the first frequency band is good, so as to be able to finely tune the resonance frequency of the high-order harmonics and adjust the resonance frequency to the target frequency of the second frequency band.

[0102] Here, the target frequency is a frequency within the second frequency band; exemplarily, when the second frequency is between 2.3 GHz and 2.5 GHz, the target frequency can be 2.4 GHz. In this way, the embodiments of the present disclosure can integrate a 2.4 GHz Bluetooth antenna or a 2.4 GHz WIFI antenna on the antenna radiator. Thus, the present disclosure does not require an additional separate Bluetooth or WIFI antenna, saving structural size and structural cost.

[0103] In some embodiments, the second tuning module includes a tuning component; the tuning component includes a tuning resistor, a tuning capacitor, and / or a tuning inductor.

[0104] Here, after the tuning component is loaded through the second upper frame point, it can change the effective electrical radiation length of the high-order harmonics of the antenna radiator, thereby finely tuning the resonance frequency of the high-order harmonics. Here, the tuning module can be a tuning resistor, a tuning capacitor, or a tuning inductor, or a combination of any two or three of the above.

[0105] Exemplarily, the above tuning component is a tuning capacitor. Taking the antenna radiator as a monopole antenna and the monopole antenna operating in the 3 / 4 wavelength mode as an example, the second frequency can be between 2.3 GHz and 2.5 GHz. At this time, the resonance frequency of the third harmonic is finely tuned to 2.4 GHz through the tuning capacitor.

[0106] The present disclosure can finely tune the center frequency of the high-order harmonics by setting the tuning component, thereby fixing the center frequency of the high-order harmonics at the target frequency and optimizing the carrier aggregation performance of the antenna module.

[0107] In some other embodiments, the second tuning module can further include a tuning switch.

[0108] In some embodiments, the second maximum position where the maximum value of the current intensity is located when the antenna radiator operates in the first frequency band is within the second overlapping region, and the second upper frame point is located at the second maximum position;

[0109] Or,

[0110] The second minimum position where the minimum value of the current intensity is located when the antenna radiator operates in the second frequency band is within the second overlapping region, and the second upper frame point is located at the second minimum position.

[0111] Combined with Figure 4a and Figure 4b ; here, Figure 4a shows the second maximum position (such as A3) of the current intensity when the antenna radiator 1 operates in the first frequency band; Figure 4b shows the second minimum position (such as A4) of the current intensity when the antenna radiator 1 operates in the second frequency band.

[0112] In the present disclosure, since the electric field strength is low at the position with high current intensity and the tuning effect is poor, when the second maximum position where the maximum value of the current intensity is located when the antenna radiator operates in the first frequency band is within the second overlapping region, setting the second tuning module at the above-mentioned second maximum position can better reduce the interference to the first tuning module when adjusting the antenna radiator to operate in the first frequency band, thereby improving the antenna performance of the antenna module for receiving and transmitting wireless signals within the first frequency band.

[0113] Since the electric field strength is high at the position with low current intensity and the tuning effect is good, when the second minimum position where the minimum value of the current intensity is located when the antenna radiator operates in the second frequency band is within the second overlapping region, setting the second tuning module at the above-mentioned second minimum position can finely tune the resonance frequencies of the high-order harmonics, so as to fix the resonance frequencies of multiple high-order harmonics at the target frequency. In this way, the antenna radiator can effectively utilize the resonance frequencies of the high-order harmonics, enabling the antenna module to receive and transmit wireless signals of the above-mentioned target frequency, and also effectively improving the carrier aggregation performance of the antenna module.

[0114] It should be noted that in the present disclosure, the above-mentioned second maximum position and the above-mentioned second minimum position may be located at the same position or different positions, and the present disclosure does not limit this.

[0115] In some embodiments, the first frequency band is between 0.6 GHz and 1 GHz, and the second frequency band is between 2.3 GHz and 2.5 GHz.

[0116] Here, if the preset tuning module electrically connected to the antenna radiator is set at the current weak points when the antenna radiator operates in the first frequency band and the current weak points when it operates in the third frequency band, the resonance frequencies of the third harmonics (high-order modes) are scattered within the third frequency band (1.8 GHz to 3 GHz), resulting in poor carrier aggregation performance of the antenna module, and interference between the third harmonics, which has an adverse impact on the communication performance of the antenna module. See Figure 5 ; Figure 5 is a schematic diagram of the performance effect of the antenna module for receiving and transmitting wireless signals shown according to an exemplary embodiment Figure 1 ; Figure 5 The abscissa in is the frequency, and the ordinate represents the return loss parameter (S11) of the antenna module. As Figure 5 shown, the resonance frequencies of the third harmonics (high-order modes) of multiple wireless signals radiating different frequency bands (B5, B8, B28Tx, B28Rx, and N71) are scattered within the third frequency band (1.8 GHz to 3 GHz).

[0117] In an exemplary embodiment of the present disclosure, the first tuning module is disposed at a position where the current intensity of the antenna radiator operating in the first frequency band is low and the current intensity of the antenna radiator operating in the third frequency band (and the second frequency band) is high, and the second tuning module is disposed at a position where the current intensity of the antenna radiator operating in the first frequency band is high and the current intensity of the antenna radiator operating in the third frequency band (and the second frequency band) is low. Refer to Figure 6 , Figure 6 which is a schematic diagram showing the performance effect of the antenna module for receiving and transmitting wireless signals according to an exemplary embodiment Figure 2 ; Here, Figure 6 the abscissa in Figure 6 and Figure 1 is the frequency, and the ordinate represents the return loss parameter (S11) of the antenna module. Combining Figure 3a and Figure 3b and Figure 6 , when the first tuning module 3 is disposed in the first overlapping region of the antenna radiator 1 and the first tuning module 3 is adjusted to different output impedances, different wireless signals are received and transmitted; the resonance frequencies of different wireless signals respectively fall within the frequency bands of B28Tx (703 MHz to 748 MHz), B28Rx (758 MHz to 803 MHz), B8 (880 MHz to 915 MHz), and B5 (824 MHz to 849 MHz); at this time, the resonance frequencies of the third harmonics of multiple wireless signals all fall between 2.3 GHz and 2.5 GHz. And, combining Figure 3a , Figure 3b and Figure 6 , under the fine-tuning effect of the second tuning module 5 on the third harmonics, the resonance frequencies of multiple third harmonics are all 2.4 GHz. Compared with Figure 5 , the resonance frequencies of the third harmonics of multiple wireless signals are more concentrated, so that the antenna module can better integrate the first frequency band and the second frequency band, further improving the carrier aggregation performance of the antenna module, reducing the interference to the signal reception and transmission of the antenna module, and improving the overall communication performance of the antenna module. And, since the resonance frequencies of multiple third harmonics can all be controlled at 2.4 GHz, a 2.4 GHz Bluetooth antenna or a 2.4 GHz WIFI antenna can be integrated on the antenna radiator. In this way, the present disclosure does not require an additional separate Bluetooth or WIFI antenna, saving the structural size and structural cost, and improving the multi-band integration degree of the antenna module.

[0118] In some embodiments, the antenna radiator further has a feeding point, and the second upper frame point is located between the feeding point and the first upper frame point.

[0119] Combining Figure 4a as shown, the second upper frame point 4 of the antenna radiator is disposed between the feeding point 6 and the first upper frame point 2.

[0120] The feeding point of the antenna module is electrically connected to the radio frequency module of the terminal device. The radio frequency module imports the electrical signal onto the antenna radiator, enabling the antenna radiator to radiate wireless signals in the first frequency band under the excitation of the electrical signal, or receive the electrical signal obtained by converting the wireless signal by the antenna radiator and transmit the converted electrical signal to the radio frequency module.

[0121] It should be noted that the radio frequency module can input different electrical signals, and the different electrical signals are respectively used to indicate that the high-order harmonics generated by the antenna radiator correspond to the 2.4 GHz frequency of the WIFI antenna, or indicate that the high-order harmonics correspond to the 2.4 GHz frequency of the Bluetooth antenna.

[0122] In the embodiments of the present disclosure, when the antenna radiator operates in the 1 / 4 wavelength mode and the 3 / 4 wavelength mode, the current intensity at the position where the feeding point is located is higher than that at the nearby positions; exemplarily, the feeding point proposed by the present disclosure is located in the first position area and / or the fourth position area.

[0123] The embodiments of the present disclosure set the feeding point to ensure that the antenna radiator can effectively transmit and receive wireless signals, and set the second upper frame point between the feeding point and the first upper frame point to ensure the rationality of the antenna module structure design.

[0124] In some embodiments, the shape of the antenna radiator is in a T shape or an L shape.

[0125] Such as Figure 1 、 Figure 3a 、 Figure 3b 、 Figure 4a and Figure 4b As shown, the shape of the antenna radiator 1 can be in an L shape.

[0126] In some other embodiments, the shape of the antenna radiator can also be set as an inverted F shape.

[0127] The embodiments of the present disclosure can flexibly set the shape of the antenna radiator to improve the diversity of the antenna module structure design.

[0128] In some embodiments, the antenna radiator includes a first branch and a second branch connecting the first branch and having an angle with the first branch;

[0129] The feeding point is located on the first branch;

[0130] The first upper frame point is located on the second branch;

[0131] The second upper frame point is located at the connection position between the first branch and the second branch.

[0132] Here, the shape of the antenna radiator can be L-shaped; the first stub can be the vertical long side of the L-shape, and the second stub can be the horizontal short side of the L-shape. At this time, the included angle between the first stub and the second stub is 90 degrees. In other examples, the shape of the antenna radiator can also be V-shaped, and at this time, the included angle between the first stub and the second stub is 60 degrees.

[0133] In the embodiments of the present disclosure, the first upper frame point and the feeding point connected to the first tuning module are arranged on two different stubs, effectively broadening the adjustable range of the electrical radiation length and improving the tuning effect on multiple sub-bands within the first frequency band of the antenna radiator. Moreover, the second upper frame point is set at the connection position between the first stub and the second stub, enabling the circuit board carrying the second tuning module to be placed at the included angle between the first stub and the second stub, saving the structural space of the antenna module.

[0134] The embodiments of the present disclosure also provide a terminal device, which includes:

[0135] The antenna module proposed in the above embodiments of the present disclosure;

[0136] A conductive frame, which is reused as the antenna radiator in the antenna module.

[0137] Here, the terminal device includes, but is not limited to, mobile phones, tablet computers, etc. Taking a mobile phone as an example, the conductive frame is used to support the functional components inside the mobile phone; here, the conductive frame can also be used as the antenna in the mobile phone to receive and transmit wireless signals, that is, it is reused as the antenna radiator of the antenna module in the embodiments of the present disclosure.

[0138] In the present disclosure, the conductive frame can be a middle frame or an outer frame, and is arranged at the top or bottom of the terminal device.

[0139] In some embodiments, the terminal device further includes:

[0140] A universal serial bus port;

[0141] The antenna radiator is arranged at the position of the universal serial bus port, and the distance between the first upper frame point of the antenna module and the universal serial bus port is less than the distance between the second upper frame point of the antenna module and the universal serial bus port.

[0142] Here, an opening is left at the bottom of the terminal device, and this opening can be used as a Universal Serial Bus (USB) port for realizing information transmission between the mobile phone and other peripheral devices. Here, the antenna radiator is disposed at the bottom of the terminal device, at the lower right corner or the lower left corner. Exemplarily, a part of the L-shaped outer frame of the terminal device at the lower right corner is reused as the antenna radiator of the present disclosure. Among them, the first upper frame point is disposed at a position close to the USB port, the second upper frame point is disposed at the bent part of the L-shaped part of the frame, and the feeding point is disposed at a position far from the USB port.

[0143] For better understanding of one or more of the above embodiments, an example is given in which the antenna radiator is a T-shaped antenna, the variable impedance component in the first tuning module is a tuning switch, and the tuning component in the second tuning module is a tuning capacitor.

[0144] See Figure 7 ; Figure 7 is a schematic connection diagram of the antenna radiator, the tuning switch, and the tuning capacitor shown according to an exemplary embodiment; as Figure 7 shown, the first upper frame point 2 is electrically connected to the tuning switch K, and is disposed at the weak current point of the T-shaped antenna operating in the 1 / 4 wavelength mode and the strong current point of the T-shaped antenna operating in the 3 / 4 wavelength mode; the second upper frame point 4 is electrically connected to the capacitive load C, and is disposed at the strong current point of the T-shaped antenna operating in the 1 / 4 wavelength mode and the weak current point of the T-shaped antenna operating in the 3 / 4 wavelength mode.

[0145] Here, the T-shaped antenna is used as a low-frequency antenna, and the tuning switch K is used to adjust the switching between sub-bands such as the B28Tx (703 MHz to 748 MHz) band, the B28Rx (758 MHz to 803 MHz) band, the B8 (880 MHz to 915 MHz), and the B5 (824 MHz to 849 MHz) band of the T-shaped antenna, and under the fine-tuning effect of the capacitive load, the resonant frequencies of the third harmonics generated by receiving and transmitting multiple wireless signals in the B28Tx band, the B28Rx band, the B8, and the B5 band are all distributed at 2.4 GHz.

[0146] See Figure 8 and Figure 9 , Figure 8 is a schematic diagram of a current mode of the antenna radiator shown according to an exemplary embodiment; Figure 9 is a schematic diagram of the system efficiency of the antenna module for receiving and transmitting wireless signals shown according to an exemplary embodiment. Figure 8 The arrows shown indicate the direction of current flow, Figure 9 the abscissa of Figure 8 represents the frequency, and the ordinate represents the total efficiency of the antenna module; asFigure 6 and Figure 9 The resonant frequencies of the third harmonics generated by the wireless signals in the B28Tx frequency band, B28Rx frequency band, B8, and B5 frequency bands are all stable at 2.4 GHz, and it has good efficiency performance, reaching -4.1 dB. The T-shaped antenna proposed in this disclosure realizes the integrated design of the low-frequency antenna and the 2.4 GHz Bluetooth antenna / 2.4 GHz WIFI antenna. When the low-frequency antenna switches among sub-bands such as B5 / B8 / B28 through the tuning switch, it can still maintain the residence of 2.4 GHz. Compared with additionally setting up a 2.4 GHz Bluetooth antenna / 2.4 GHz WIFI antenna, or adding multiple switches for separate tuning, this disclosure saves both structural occupation and structural cost; moreover, by fixing 2.4 GHz, it is beneficial to improving the performance of carrier aggregation, enabling the antenna module to be active in the working scenarios of the low-frequency antenna and the short-distance antenna (2.4 GHz WIFI antenna / 2.4 GHz Bluetooth antenna), which will bring a better signal experience to users and broaden the practicability of the antenna module.

[0147] Figure 10 FIG. is a block diagram of a terminal device shown according to an exemplary embodiment. For example, the terminal device 900 may be a mobile phone, a computer, a digital broadcast terminal, a messaging device, a game console, a tablet device, a medical device, a fitness device, a personal digital assistant, etc.

[0148] Referring to Figure 10 , the terminal device 900 may include one or more of the following components: a processing component 902, a memory 904, a power component 906, a multimedia component 908, an audio component 910, an input / output (I / O) interface 912, a sensor component 914, and a communication component 916.

[0149] The processing component 902 generally controls the overall operation of the terminal device 900, such as operations associated with display, telephone calls, data communication, camera operations, and recording operations. The processing component 902 may include one or more processors 920 to execute instructions to complete all or part of the steps of the above method. In addition, the processing component 902 may include one or more modules to facilitate the interaction between the processing component 902 and other components. For example, the processing component 902 may include a multimedia module to facilitate the interaction between the multimedia component 908 and the processing component 902.

[0150] The memory 904 is configured to store various types of data to support the operation of the terminal device 900. Examples of such data include instructions for any application or method operating on the terminal device 900, contact data, phone book data, messages, pictures, videos, and the like. The memory 904 can be implemented by any type of volatile or non-volatile storage device or a combination thereof, such as static random access memory (SRAM), electrically erasable programmable read-only memory (EEPROM), erasable programmable read-only memory (EPROM), programmable read-only memory (PROM), read-only memory (ROM), magnetic memory, flash memory, magnetic disk, or optical disk.

[0151] The power supply component 906 provides power to various components of the terminal device 900. The power supply component 906 may include a power management system, one or more power supplies, and other components associated with generating, managing, and distributing power for the terminal device 900.

[0152] The multimedia component 908 includes a screen that provides an output interface between the terminal device 900 and the user. In some embodiments, the screen may include an OLED display panel, such as an AMOLED display panel, and may also be a liquid crystal display (LCD) and a touch panel (TP). If the screen includes a touch panel, the screen can be implemented as a touch screen to receive input signals from the user. The touch panel includes one or more touch sensors to sense touches, swipes, and gestures on the touch panel. The touch sensors can not only sense the boundaries of touch or swipe actions, but also detect the duration and pressure associated with the touch or swipe operation. In some embodiments, the multimedia component 908 includes a front camera and / or a rear camera. When the terminal device 900 is in an operating mode, such as a shooting mode or a video mode, the front camera and / or the rear camera can receive external multimedia data. Each of the front camera and the rear camera can be a fixed optical lens system or have a focal length and optical zoom capabilities.

[0153] The audio component 910 is configured to output and / or input audio signals. For example, the audio component 910 includes a microphone (MIC) that is configured to receive external audio signals when the terminal device 900 is in an operating mode, such as a call mode, a recording mode, and a voice recognition mode. The received audio signals can be further stored in the memory 904 or transmitted via the communication component 916. In some embodiments, the audio component 910 further includes a speaker for outputting audio signals.

[0154] The I / O interface 912 provides an interface between the processing component 902 and a peripheral interface module, which may be a keyboard, click wheel, buttons, etc. These buttons may include, but are not limited to: home button, volume button, power button, and lock button.

[0155] The sensor component 914 includes one or more sensors for providing status assessments of various aspects of the terminal device 900. For example, the sensor component 914 can detect the on / off state of the terminal device 900, the relative positioning of components, such as the display and keypad of the terminal device 900. The sensor component 914 can also detect a change in the position of the terminal device 900 or a component of the terminal device 900, the presence or absence of user contact with the terminal device 900, the orientation or acceleration / deceleration of the terminal device 900, and the temperature change of the terminal device 900. The sensor component 914 can include a proximity sensor configured to detect the presence of nearby objects without any physical contact. The sensor component 914 can also include a light sensor, such as a CMOS or CCD image sensor, for use in imaging applications. In some embodiments, the sensor component 914 can further include an acceleration sensor, a gyroscope sensor, a magnetic sensor, a pressure sensor, or a temperature sensor.

[0156] The communication component 916 is configured to facilitate communication between the terminal device 900 and other devices in a wired or wireless manner. The terminal device 900 can access a wireless network based on communication standards, such as WiFi, 2G, or 3G, or a combination thereof. In an exemplary embodiment, the communication component 916 receives broadcast signals or broadcast-related information from an external broadcast management system via a broadcast channel. In an exemplary embodiment, the communication component 916 further includes a near field communication (NFC) module to facilitate short-range communication. For example, the NFC module can be implemented based on radio frequency identification (RFID) technology, infrared data association (IrDA) technology, ultra-wideband (UWB) technology, Bluetooth (BT) technology, and other technologies.

[0157] In an exemplary embodiment, the terminal device 900 can be implemented by one or more application specific integrated circuits (ASICs), digital signal processors (DSPs), digital signal processing devices (DSPDs), programmable logic devices (PLDs), field programmable gate arrays (FPGAs), controllers, microcontrollers, microprocessors, or other electronic components.

[0158] In an exemplary embodiment, a non-transitory computer-readable storage medium including instructions is also provided, such as a memory 904 including instructions, and the above instructions can be executed by a processor 920 of a terminal device 900. For example, the non-transitory computer-readable storage medium may be a ROM, a random access memory (RAM), a CD-ROM, a magnetic tape, a floppy disk, and an optical data storage device, etc.

[0159] Those skilled in the art will readily conceive of other embodiments of the present disclosure after considering the specification and practicing the invention disclosed herein. The present disclosure is intended to cover any variations, uses, or adaptations of the present disclosure, which follow the general principles of the present disclosure and include known common general knowledge or conventional technical means in the technical field not disclosed in the present disclosure. The specification and embodiments are only to be regarded as exemplary, and the true scope and spirit of the present disclosure are pointed out by the following claims.

[0160] It should be understood that the present disclosure is not limited to the exact structures described above and shown in the drawings, and various modifications and changes can be made without departing from its scope. The scope of the present disclosure is only limited by the appended claims.

Claims

1. An antenna module, characterized in that, it includes: an antenna radiator having a first position area and a second position area; the first position area is an area formed by the positions where the current intensity of the antenna radiator is lower than a first current threshold when the antenna radiator operates in a first frequency band, and the second position area is an area formed by the positions where the current intensity of the antenna radiator is higher than a second current threshold when the antenna radiator operates in a second frequency band; a first upper frame point located in a first overlapping area of the first position area and the second position area; a first tuning module electrically connected to the first upper frame point; wherein, when the first tuning module adjusts the antenna radiator to operate in the first frequency band, the center frequency of the high-order harmonics generated by the antenna radiator is located within the second frequency band.

2. The antenna module according to claim 1, characterized in that, the first minimum value position where the minimum value of the current intensity of the antenna radiator is located when the antenna radiator operates in the first frequency band is located within the first overlapping area, and the first upper frame point is located at the first minimum value position; or, the first maximum value position where the maximum value of the current intensity of the antenna radiator is located when the antenna radiator operates in the second frequency band is located within the first overlapping area, and the first upper frame point is located at the first maximum value position.

3. The antenna module according to claim 1, characterized in that, the antenna radiator further has a third position area and a fourth position area; the third position area is an area formed by the positions where the current intensity of the antenna radiator is higher than the first current threshold when the antenna radiator operates in the first frequency band, and the fourth position area is an area formed by the positions where the current intensity of the antenna radiator is lower than the second current threshold when the antenna radiator operates in the second frequency band; the antenna module further includes: a second upper frame point located in a second overlapping area of the third position area and the fourth position area; a second tuning module electrically connected to the second upper frame point and configured to adjust the center frequency of the high-order harmonics to a target frequency within the second frequency band.

4. The antenna module according to claim 3, characterized in that, the second maximum value position where the maximum value of the current intensity of the antenna radiator is located when the antenna radiator operates in the first frequency band is located within the second overlapping area, and the second upper frame point is located at the second maximum value position; or, the second minimum value position where the minimum value of the current intensity of the antenna radiator is located when the antenna radiator operates in the second frequency band is located within the second overlapping area, and the second upper frame point is located at the second minimum value position.

5. The antenna module according to claim 3, characterized in that, the second tuning module includes a tuning component; the tuning component includes a tuning resistor, a tuning capacitor, and / or a tuning inductor.

6. The antenna module according to claim 3, characterized in that, the antenna radiator further has a feeding point, and the second upper frame point is located between the feeding point and the first upper frame point.

7. The antenna module according to claim 6, characterized in that, the antenna radiator includes a first branch and a second branch connected to the first branch and having an included angle with the first branch; The feeding point is located on the first stub; The first upper frame point is located on the second stub; The second upper frame point is located at the connection position between the first stub and the second stub.

8. The antenna module according to any one of claims 1 to 7, characterized in that the first frequency band includes a plurality of sub - frequency bands; the first tuning module has a variable impedance component; when the impedance of the variable impedance component is different, the antenna radiator operates in different sub - frequency bands.

9. The antenna module according to claim 8, characterized in that the variable impedance component includes a switching component.

10. The antenna module according to any one of claims 1 to 7, characterized in that the first frequency band is between 0.6 GHz and 1 GHz, and the second frequency band is between 2.3 GHz and 2.5 GHz.

11. The antenna module according to any one of claims 1 to 7, characterized in that the shape of the antenna radiator is in a T shape or an L shape.

12. The antenna module according to any one of claims 1 to 7, characterized in that the antenna radiator includes a monopole antenna, and the high - order harmonic is the third - order harmonic generated when the antenna radiator operates in the first frequency band.

13. A terminal device, characterized in that it includes: the antenna module according to any one of claims 1 to 12; a conductive frame, reused as the antenna radiator in the antenna module.

14. The terminal device according to claim 13, characterized in that the terminal device further includes: a universal serial bus port; the antenna radiator is arranged at the position of the universal serial bus port, and the distance between the first upper frame point of the antenna module and the universal serial bus port is less than the distance between the second upper frame point of the antenna module and the universal serial bus port.

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