Antenna module and terminal equipment

Abstract

The utility model relates to an antenna module and terminal equipment. The antenna module comprises a first radiator used for receiving and transmitting wireless signals of a first frequency band, and the first radiator is provided with a grounding end; the second radiating body is arranged at the position of the grounding end of the first radiating body and is provided with a feed end; and the tuning module is connected between the feed end and a target feed source, and is used for adjusting the frequency of the wireless signals transmitted and received by the second radiator and enabling the center frequency of higher harmonics generated by the wireless signals transmitted and received by the second radiator to be located outside the first frequency band. Through the tuning module arranged on the second radiator, the influence of the wireless signal received and transmitted by the second radiator on the first radiator is reduced, and the antenna performance of the first radiator is improved.

Description

Technical Field

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

[0002] With the continuous progress and development of terminal devices, the functions on terminal devices are also constantly being improved and updated. Antenna modules can be set on smart terminal devices such as mobile phones, and the ability of antenna modules to send and receive wireless signals can be used to achieve more comprehensive and excellent communication and positioning functions.

[0003] For terminal devices, in order to achieve the multi-band effect of the antenna module, a pair of antennas will be set in the antenna module; however, since the distance between the pair of antennas is too close, or the pair of antennas are set on the same ground, they will interfere with each other when sending and receiving signals, affecting the antenna performance of the antenna module. Utility Model Content

[0004] In order to overcome the problems existing in the related art, the present disclosure provides an antenna module and a terminal device.

[0005] According to a first aspect of an embodiment of the present disclosure, there is provided an antenna module, including:

[0006] A first radiator, used for transmitting and receiving wireless signals in a first frequency band, wherein the first radiator has a ground terminal;

[0007] A second radiator, disposed at the position of the ground end of the first radiator, having a feeding end;

[0008] A tuning module is connected between the feeding end and the target feed source, and is used to adjust the frequency of the wireless signal received and sent by the second radiator, so that the center frequency of the higher harmonics generated by the wireless signal received and sent by the second radiator is located outside the first frequency band.

[0009] In some embodiments, the second radiator has a first end and a second end that are disposed oppositely;

[0010] The first end portion is disposed at the position of the ground end of the first radiator;

[0011] The feeding end is located between the first end and the second end, and the distance between the feeding end and the second end is an integer multiple of half the wavelength of the wireless signal in the first frequency band.

[0012] In some embodiments, the second radiator includes a first branch and a second branch;

[0013] There is a break between the first branch node and the second branch node;

[0014] The first end and the second end are two opposite ends of the first branch, and the distance between the first end and the fracture is greater than the distance between the second end and the fracture;

[0015] Wherein, when the target feed source feeds an excitation signal to the feeding end, the first branch and the second branch jointly transmit and receive wireless signals.

[0016] In some embodiments, the first end is connected to a ground end of the first radiator, so as to ground the second radiator through the ground end of the first radiator.

[0017] In some embodiments, the tuning module includes a tuning switch;

[0018] When the tuning switch is in different switch states, the second radiator transmits and receives wireless signals in different sub-frequency bands within the second frequency band;

[0019] The frequencies in the second frequency band are smaller than the frequencies in the first frequency band; and the center frequencies of the higher harmonics generated by the wireless signals in the different sub-frequency bands are all outside the first frequency band.

[0020] In some embodiments, when the tuning switch is in different switch states, different capacitances are formed between the feeding terminal and the target feed source.

[0021] In some embodiments, the different switch states include a first switch state and a second switch state;

[0022] When the tuning switch is in the first switch state, a capacitor with a first capacitance value is formed between the feeding end and the target feed source; when the tuning switch is in the second switch state, a capacitor with a second capacitance value is formed between the feeding end and the target feed source;

[0023] The first capacitance value is within a range of 0.4 picofarad to 0.6 picofarad; and the second capacitance value is within a range of 0.8 picofarad to 1.2 picofarad.

[0024] In some embodiments, the second radiator is an inverted-F radiator.

[0025] In some embodiments, the first frequency band is within the range of 5.1 GHz to 5.8 GHz.

[0026] According to a second aspect of an embodiment of the present disclosure, a terminal device is provided, including:

[0027] The antenna module in the first aspect above;

[0028] A conductive shell, part of which is reused as the first radiator and the second radiator in the antenna module.

[0029] In some embodiments, the conductive housing includes a first frame and a second frame;

[0030] The first frame and the second frame are distributed on the same side of the terminal device, and there is a gap between the first frame and the second frame;

[0031] A portion of the first frame is reused as the first radiator;

[0032] Another part of the first frame and the second frame are reused together as the second radiator.

[0033] The technical solution provided by the embodiments of the present disclosure may have the following beneficial effects:

[0034] The antenna module proposed in the embodiment of the present disclosure has a first radiator and a second radiator arranged head to head; a tuning module is arranged on the second radiator, and the tuning module can adjust the center frequency of the wireless signal received and sent by the second radiator; in this way, through the tuning module, the second radiator can operate at a more precise operating frequency, improve the antenna efficiency, and broaden the antenna usage scenario; it can also make the center frequency of the higher harmonics generated by the wireless signal received and sent by the second radiator be located outside the first frequency band of the first radiator, increase the isolation between the second radiator and the first radiator, and then improve the antenna performance of the first radiator.

[0035] It is to be understood that the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the present disclosure. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present disclosure and, together with the description, serve to explain the principles of the present disclosure.

[0037] Figure 1 is a schematic diagram of a structure of an antenna module according to an exemplary embodiment Figure 1 ;

[0038] Figure 2 is a schematic diagram of a structure of an antenna module according to an exemplary embodiment Figure 2 ;

[0039] Figure 3 is a simulation effect diagram of a first radiator receiving and sending a wireless signal according to an exemplary embodiment;

[0040] Figure 4is a simulation effect diagram of a second radiator receiving and sending a wireless signal according to an exemplary embodiment;

[0041] Figure 5 is a schematic diagram of a conductive frame of a terminal device according to an exemplary embodiment;

[0042] Figure 6 The present invention is a structural block diagram of a terminal device according to an exemplary embodiment. DETAILED DESCRIPTION

[0043] Here, exemplary embodiments will be described in detail, examples of which are shown in the accompanying 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 embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present disclosure. Instead, they are only examples of devices and methods consistent with some aspects of the present disclosure.

[0044] Figure 1 is a schematic diagram of a structure of an antenna module according to an exemplary embodiment Figure 1 .like Figure 1 As shown, the antenna module 1 proposed in the embodiment of the present disclosure includes:

[0045] A first radiator 11, used for transmitting and receiving wireless signals in a first frequency band, and the first radiator 11 has a ground terminal 111;

[0046] The second radiator 12 is arranged at the position of the ground end 111 of the first radiator 11 and has a feeding end 121;

[0047] The tuning module 13 is connected between the feeding end 121 and the target feed source F, and is used to adjust the frequency of the wireless signal received and sent by the second radiator 12, and make the center frequency of the higher harmonics generated by the wireless signal received and sent by the second radiator 12 be outside the first frequency band.

[0048] Here, the antenna module provided by the present invention is arranged in a terminal device, and the terminal device includes a mobile phone, a tablet computer, etc.; the antenna module receives and sends wireless signals in the terminal device through a first radiator and a second radiator; wherein, when the above-mentioned antenna module is used to send and receive wireless signals, the terminal device can perform wireless communication, positioning or charging, etc.

[0049] The antenna module proposed in the embodiment of the present disclosure can be set on the frame, back shell or middle frame of the terminal device, or can be set between the back shell and the middle frame, or between the middle frame and the display screen, etc.; here, the first radiator and the second radiator of the antenna module can be formed as a frame antenna, or formed as a patch wire, cavity antenna, etc.

[0050] In the embodiment of the present disclosure, the first radiator has a feeding position, and a corresponding feed source is connected to the feeding position; the feed source can feed an excitation signal to the first radiator so that the first radiator transmits and receives wireless signals in the first frequency band.

[0051] It should be noted that the feeding position and the grounding end of the first radiator of the present invention can be distributed at two opposite ends of the first radiator; the distance between the feeding position and the grounding end of the first radiator can be half or 1 / 4 of the wavelength of the wireless signal in the first frequency band; in this way, when the first radiator operates in the 1 / 2 wavelength mode or the 1 / 4 wavelength mode, the first radiator can receive and transmit wireless signals in the first frequency band without setting a tuning switch.

[0052] Among them, the first frequency band can be set according to the wireless communication requirements of the terminal device; in the embodiment of the present disclosure, the first frequency band can be located within the high frequency band (High Band, HB); usually, the HB frequency band is generally a frequency band exceeding 3GHz.

[0053] In some embodiments, the first frequency band is within the range of 5.1 GHz to 5.8 GHz.

[0054] Here, the first radiator can receive and transmit wireless signals within a frequency band of 5.1 to 5.8 GHz under the action of a corresponding feed source.

[0055] In actual implementation, the feed source corresponding to the first radiator can be a wireless fidelity RF terminal, or a cellular network RF terminal, etc.; in this way, the first radiator can operate in an operating frequency band of 5.1GHz to 5.8GHz, and transmit and receive wireless fidelity signals with a center frequency of 5.1GHz, or transmit and receive cellular signals with a center frequency of 5.1GHz (or 5.5GHz, 5.8GHz), etc.

[0056] Here, the present invention can improve the comprehensiveness and richness of the antenna module receiving and transmitting wireless signals in the range of 5.1 GHz to 5.8 GHz by using the first radiator, thereby improving the practicality of the antenna module in wireless communication scenarios.

[0057] In the embodiment of the present disclosure, the second radiator is arranged at the position of the ground end of the first radiator. It can be understood that the second radiator and the first radiator are radiators arranged head to head. When the second radiator and the first radiator each form an antenna, the second radiator and the first radiator form a head-to-head antenna in the terminal device.

[0058] Here, a feeding end is provided on the second radiator, and the feeding end is located at a position far away from the first radiator; when the target feed source feeds an excitation signal to the second radiator through the feeding end, the second radiator can transmit and receive wireless signals in the second frequency band. It should be noted that in the present disclosure, the second frequency band is different from the first frequency band, and the frequency in the second frequency band is smaller than the frequency in the first frequency band.

[0059] It should be noted that since the frequency of the wireless signal received and transmitted by the second radiator is lower than the frequency of the first frequency band, the higher harmonics of the wireless signal received and transmitted by the second radiator may fall within the first frequency band, affecting the performance of the first radiator; thus, the embodiment of the present disclosure sets a tuning module in the feeding end and the target feed source of the second radiator, and through the tuning action of the tuning module, changes the center frequency of the wireless signal received and transmitted by the first radiator, so that the higher-order modes corresponding to the wireless signal are away from the range of the first frequency band.

[0060] Here, the tuning module includes a tuning switch, or includes a variable impedance component, etc.

[0061] In this way, the embodiment of the present disclosure can not only adjust the center frequency of the wireless signal received and transmitted on the second radiator through the tuning module provided on the second radiator, so that the second radiator operates at a more precise operating frequency and improves the antenna efficiency; it can also control the radiation effect of the second radiator on the first radiator through the tuning action of the tuning module, reduce the degree of standing waves on the first radiator, and thus improve the antenna performance of the first radiator.

[0062] In the embodiment of the present disclosure, the shapes of the first radiator and the second radiator may be the same or different. For example, the first radiator and the second radiator may both be in a straight line shape or in an L shape, etc., and the present disclosure does not limit this.

[0063] The antenna module proposed in the embodiment of the present disclosure has a first radiator and a second radiator arranged head to head; a tuning module is arranged on the second radiator, and the tuning module can adjust the center frequency of the wireless signal received and sent by the second radiator; in this way, through the tuning module, the second radiator can operate at a more precise operating frequency, improve the antenna efficiency, and broaden the antenna usage scenario; it can also make the center frequency of the higher harmonics generated by the wireless signal received and sent by the second radiator be located outside the first frequency band of the first radiator, increase the isolation between the second radiator and the first radiator, and then improve the antenna performance of the first radiator.

[0064] In some embodiments, see Figure 2 , Figure 2 is a schematic diagram of a structure of an antenna module according to an exemplary embodiment Figure 2 ; Wherein, the second radiator 12 has a first end 122 and a second end 123 which are arranged opposite to each other;

[0065] The first end portion 122 is disposed at the position of the ground end 111 of the first radiator 11;

[0066] The feeding end 121 is located between the first end 122 and the second end 123 , and the distance between the feeding end 121 and the second end 123 is an integer multiple of half the wavelength of the wireless signal in the first frequency band.

[0067] In the embodiment of the present disclosure, the first end is arranged at the position of the ground end of the first radiator, and can be connected to the ground end of the first radiator, or can be connected to other ground ends, or can be suspended in the air, and the embodiment of the present disclosure does not limit this; in addition, the second end in the present disclosure is suspended in the air and is used to radiate wireless signals outward.

[0068] It should be noted that the above-mentioned feeding end is arranged between the ground end and the second end of the first radiator. If the tuning module is not enabled, the physical length between the feeding end and the second end can determine the effective radiation length of the second radiator; if the tuning module is enabled, the effective radiation length of the second radiator can be changed during the tuning process, thereby changing the resonant frequency of the second radiator receiving and sending wireless signals, so that the second radiator can operate at different operating frequencies.

[0069] In the disclosed embodiment, the first radiator operates in a 1 / 2 wavelength mode; thus, when the distance between the feeding end and the second end is set to an integer multiple of half the wavelength of the wireless signal in the first frequency band, if the tuning module is not enabled, that is, when the tuning module is equivalent to an impedance-free element, since the higher harmonics of the wireless signal are usually integer multiples of the fundamental wave, for example, the higher harmonics may be the third harmonic, the fifth harmonic or the seventh harmonic, etc., at least one higher harmonic of the wireless signal received and transmitted by the second radiator may be the same as the center frequency of the wireless signal received and transmitted by the first radiator.

[0070] In this way, the embodiment of the present disclosure can set the distance between the feeding end and the second end to an integer multiple of half the wavelength of the wireless signal in the first frequency band, especially an odd multiple such as three times; in this way, when the tuning module is enabled in the present disclosure, the tuning effect of the tuning module can be used to change the input impedance of the circuit between the feeding end and the target feed source, so that the center frequency of the higher harmonics of the wireless signal received and transmitted by the second radiator is offset and moved out of the first frequency band, thereby reducing the clutter interference of the second radiator on the first radiator.

[0071] It should be noted that if the tuning module needs to adjust the resonant frequency point over a larger range, more and more complex devices need to be set in the tuning module, and it is easy to affect the frequency modulation effect of the second radiator itself in sending and receiving wireless signals; thus, the embodiment of the present disclosure sets the second radiator at a position corresponding to an integer multiple of half the wavelength of the wireless signal in the first frequency band, so that the tuning module can more easily adjust the center frequency of the higher harmonics of the wireless signal sent and received by the second radiator to leave the first frequency band in which the first radiator works, thereby improving the tuning efficiency.

[0072] In the embodiment of the present disclosure, if the first radiator operates in the 1 / 4 wavelength mode, the embodiment of the present disclosure can also set the distance between the feeding end and the second end to an integer multiple of 1 / 4 of the wavelength of the wireless signal in the first frequency band.

[0073] In some embodiments, in combination Figure 1 and Figure 2 As shown, the second radiator 12 includes a first branch 124 and a second branch 125;

[0074] There is a break S between the first branch 124 and the second branch 125;

[0075] The first end 122 and the second end 123 are two opposite ends of the first branch 124, and the distance between the first end 122 and the slit is greater than the distance between the second end 123 and the slit S;

[0076] When the target feed source F feeds an excitation signal to the feeding end 121 , the first branch 124 and the second branch 125 jointly transmit and receive wireless signals.

[0077] Here, there is a break between the first branch and the second branch, the second end of the first branch is located at the break, and the first end of the first branch is located away from the break, wherein the break can provide a signal receiving and sending space so that both the first branch and the second branch can send and receive wireless signals.

[0078] In the present disclosure, in combination Figure 2 One end of the second branch 125 away from the fracture S can be grounded to form an effective ground loop.

[0079] It should be noted that when the target feed source feeds an excitation signal to the feeding end, an alternating current is generated on the first branch. When the first branch converts the alternating current into an alternating magnetic field, the second branch can generate an alternating current under the action of the alternating magnetic field, and then generate an alternating magnetic field based on the alternating current, so that the second branch is electromagnetically coupled with the first branch, and jointly transmits and receives wireless signals of the same frequency band. For example, in combination with the above disclosure, the first branch and the second branch are used to transmit and receive wireless signals of the second frequency band.

[0080] Among them, the second frequency band can be set according to the wireless communication requirements of the terminal device; in the embodiment of the present disclosure, the second frequency band can be located in the mid-frequency band (Mid Band, MB) or the low-frequency band (Low Band, LB); usually, the mid-frequency band is a frequency band in the range of 1.7GHz to 3GHz; the low-frequency band is a frequency band less than 1GHz.

[0081] The embodiment of the present disclosure can improve the signal receiving and sending performance of the second radiator by utilizing the first branch and the second branch to couple and receive wireless signals.

[0082] In some embodiments, in combination Figure 2 The first end 122 is connected to the ground end 111 of the first radiator 11 , and is used to ground the second radiator 12 through the ground end 111 of the first radiator 11 .

[0083] Here, the first radiator and the second radiator proposed in the embodiment of the present disclosure share the same ground terminal, and are connected to the ground plane in the terminal device through the same ground terminal.

[0084] Exemplary, combined Figure 2 The first branch 124 and the first radiator 11 are connected via the ground terminal 111. The first branch 124 and the second branch 125 transmit and receive wireless signals of the second frequency band, and the first radiator 11 transmits and receives wireless signals of the first frequency band. Therefore, the first radiator 11 and the second radiator 12 can be used to form an unbalanced head-to-head antenna with a common ground.

[0085] It can be understood that the embodiment of the present disclosure not only improves the antenna integration of the antenna module by setting the first end to connect to the ground end of the first radiator, but also reduces the wiring complexity of setting a separate ground end, making the antenna layout simpler.

[0086] In some embodiments, in combination Figure 2 , the tuning module 13 includes a tuning switch 131;

[0087] When the tuning switch 131 is in different switch states, the second radiator 12 transmits and receives wireless signals in different sub-bands within the second frequency band;

[0088] The frequencies in the second frequency band are smaller than the frequencies in the first frequency band; and the center frequencies of the higher-order harmonics generated by wireless signals in different sub-frequency bands are all outside the first frequency band.

[0089] In some examples, the tuning switch has a switch input and a switch output, wherein the switch input and the switch output are respectively connected to the feeding end and the target feed source, wherein at least two tuning branches arranged in parallel are arranged between the switch input and the switch output, and impedance elements with different impedances are arranged on at least two tuning branches, and the impedance element can be at least one or a combination of the following: capacitance, inductance, and resistance.

[0090] Among them, the tuning switch can be a mechanical switch such as a single-pole multi-throw switch or a multi-pole multi-throw switch, or a signal switch such as a MOS tube; when the tuning switch is working, only one tuning branch is closed and turned on between the switch input and the switch output, and when the tuning switch is in different switch states, the tuning branches turned on at the switch input and the switch output are different. In this way, since the tuning branches turned on at the switch input and the switch output are different when the tuning switch is in different switch states, the overall impedance of the tuning branch is different, that is, the input impedance is different, so the effective radiation length of the second radiator is different; in this way, the second radiator can resonate in different sub-bands within the second frequency band, so that the second radiator can receive and transmit wireless signals in different sub-bands, thereby improving the comprehensiveness of the second radiator in receiving and transmitting wireless signals.

[0091] In the disclosed embodiment, the different sub-bands in the second frequency band are all frequency bands smaller than the first frequency band, such as sub-bands in the MB frequency band or the LB frequency band. In actual scenarios, the sub-bands in the second frequency band can be frequency bands from 703 megahertz (MHz) to 960MHz or from 1710MHz to 2700MHz, so that the second radiator can receive and send cellular communication signals in the frequency band; the sub-bands in the second frequency band can also be frequency bands from 2.4GHz to 2.4835GHz, so that the second radiator can receive and send wireless fidelity signals in the sub-band.

[0092] It should be noted that the embodiment of the present disclosure can adjust the resonant frequency of the sub-band within the second frequency band through the tuning switch, so that the center frequency of the higher harmonics corresponding to the wireless signals of each sub-band is outside the first frequency band, thereby reducing the standing waves generated by the higher harmonics on the first radiator to improve the performance of the first radiator.

[0093] In the embodiment of the present disclosure, there is a first matching circuit between the feeding end and the tuning switch, and a second matching circuit is provided between the tuning switch and the target feed source, and both the first matching circuit and the second matching circuit are used to achieve impedance matching. The first matching circuit includes a first capacitor connected in series on the line between the feeding end and the tuning switch, and a matching inductor located on the line between the first capacitor and the tuning switch and grounded; the second matching circuit includes a matching resistor on the line between the tuning switch and the target feed source, and a second capacitor located on the line between the matching resistor and the target feed source and grounded.

[0094] Exemplary, combined Figure 2 , Figure 2 The first capacitor C1 may have a capacitance value of 1.8 pF; the matching inductor L1 may have an inductance value of 2.7 nanohenry (nH); the second capacitor C2 may have a capacitance value of 1 pF; and the matching resistor R may have a resistance value between 0 ohm (Ω) and 1 Ω.

[0095] In some embodiments, when the tuning switch is in different switch states, different capacitances are formed between the feeding terminal and the target feed source.

[0096] In the disclosed embodiment, impedance elements with different capacitances may be provided in the tuning switch. When the tuning switch is in different switching states, the tuning switch may be equivalent to capacitors with different capacitances between the feeding end and the target feed source.

[0097] Exemplarily, components with different capacitance values ​​are formed on the different tuning branches proposed above in the present disclosure.

[0098] In the disclosed embodiment, since capacitors with different capacitance values ​​form different impedances between the feeding end and the target feed source, the first radiator can radiate wireless signals of different sub-bands by adjusting different switching states of the tuning switch.

[0099] In some embodiments, the different switch states include a first switch state and a second switch state;

[0100] When the tuning switch is in a first switching state, a capacitor with a first capacitance value is formed between the feeding end and the target feed source; when the tuning switch is in a second switching state, a capacitor with a second capacitance value is formed between the feeding end and the target feed source;

[0101] The first capacitance value is within a range of 0.4 pF to 0.6 pF; the second capacitance value is within a range of 0.8 pF to 1.2 pF.

[0102] Here, in combination with the above disclosure, when the tuning switch is in the first switching state, the tuning switch turns on one of the above-mentioned tuning branches, so that the entire tuning switch is equivalent to a capacitor with a first capacitance value between the feeding end and the target feed source; when the tuning switch is in the second switching state, the tuning switch turns on another tuning branch, so that the entire tuning switch is equivalent to a capacitor with a second capacitance value between the feeding end and the target feed source.

[0103] It should be noted that the tuning switch may also have a third switch state. When the tuning switch is in the third switch state, the tuning switch is in a short-circuit state, that is, the tuning switch may be equivalent to a path with a zero resistance.

[0104] In this way, the embodiment of the present disclosure can make the tuning switch equivalent to a capacitor with a first capacitance value and a second capacitance value respectively by adjusting the tuning switch to switch between the first switch state and the second switch state, so that the center frequencies corresponding to the fundamental wave and higher harmonics of the wireless signal received and transmitted by the second radiator can be shifted to different degrees, which helps to further improve the antenna performance of the first radiator and the flexibility and richness of the second radiator in transmitting and receiving wireless signals.

[0105] Here, the first capacitance value is within 0.4 pF to 0.6 pF, and the second capacitance value is within 0.8 pF to 1.2 pF. For example, the first capacitance value may be 0.5 pF, and the second capacitance value may be 1.0 pF.

[0106] See also Figure 3 , Figure 3 is a simulation effect diagram of a first radiator receiving and sending a wireless signal according to an exemplary embodiment; here, Figure 3 In the figure, the horizontal axis represents the frequency in GHz, and the vertical axis represents the antenna efficiency in dB. Figure 3 Curve 31 shown is the antenna efficiency of the first radiator when the untuned switch is not tuned; curve 32 is the antenna efficiency of the first radiator when the tuning switch is in the first switching state and is equivalent to a 0.5pF capacitor; curve 33 is the antenna efficiency of the first radiator when the tuning switch is in the second switching state and is equivalent to a 1pF capacitor.

[0107] Depend on Figure 3 As shown, when the tuning switch is equivalent to a 1pF capacitor, the antenna efficiency of the first radiator is significantly improved by at least 0.5dB when transmitting and receiving wireless signals in the 5.1GHz to 5.2GHz frequency band; when the tuning switch is equivalent to a 0.5pF capacitor, the antenna efficiency of the first radiator is significantly improved by at least 0.5dB when transmitting and receiving wireless signals in the 5.5GHz to 5.7GHz frequency band.

[0108] See also Figure 4 , Figure 4 is a simulation effect diagram of a second radiator receiving and sending a wireless signal according to an exemplary embodiment; Figure 4 In the figure, the horizontal axis represents the frequency in GHz, and the vertical axis represents the return loss parameter (i.e., S11 parameter) in dB. Figure 4 Curve 41 shown is the S11 parameter of the second radiator when the untuned switch is untuned; curve 42 is the S11 parameter of the second radiator when the tuning switch is in the first switching state and is equivalent to a 0.5pF capacitor; curve 43 is the S11 parameter of the second radiator when the tuning switch is in the second switching state and is equivalent to a 1pF capacitor.

[0109] Depend on Figure 4 It can be seen from curve 41 that when the tuning switch is not tuned, the wireless signal received and sent by the second radiator has a high-order resonance in the range of 5.1 to 5.8 GHz, resulting in a small isolation between the first radiator and the second radiator, affecting the antenna performance of the first radiator; by comparing curve 42 and curve 43 with curve 41, it can be seen that by making the tuning switch equivalent to a capacitor of 1pF or 0.5pF respectively, the resonant frequency of the high-order harmonics of the second radiator can be located at different positions outside the range of 5.1 to 5.8 GHz.

[0110] Here, located Figure 4 The data in the upper left corner is the antenna isolation data corresponding to sampling points 1 to 9 during the process of the second radiator receiving and sending wireless signals when the tuning switch is equivalent to a capacitance of 0.5pF. From the collected antenna isolation data, it can be seen that at sampling points 6 and 8, that is, 5.1GHz and 5.8GHz, the antenna isolation between the first radiator and the second radiator is large, so the second radiator has less interference on the first radiator.

[0111] In some embodiments, the second radiator is an inverted-F radiator.

[0112] Here, see Figure 2 The grounding end 111 of the first radiator 11 is a ground return branch, which is connected to the grounding surface of the terminal device, wherein the grounding surface is located on the middle frame of the terminal device.

[0113] The first end of the second radiator in the disclosed embodiment is connected to the ground end of the first radiator, that is, the second radiator is connected to the ground plane of the terminal device through the above-mentioned ground return branch, and the feeding end is arranged between the break and the ground return branch. In this way, the second radiator is an inverted F-type radiator, that is, the second radiator can be formed into an inverted F-type antenna.

[0114] It can be understood that the inverted F-type antenna is folded into an F shape, which significantly reduces the volume and height of the antenna, and can be effectively used in terminal devices with limited space, such as mobile phones, watches and other devices; and due to the structural characteristics of the inverted F-type antenna, the inverted F-type antenna is relatively easy to match with the circuit, thereby ensuring that the wireless signals received and sent by the second radiator can be transmitted efficiently.

[0115] In some other embodiments of the present disclosure, the first radiator and the second radiator may also be formed as a monopole antenna, a patch antenna, etc., which is not limited in the embodiments of the present disclosure.

[0116] The present disclosure also provides a terminal device, which includes:

[0117] The antenna module in the first aspect above;

[0118] The conductive shell, part of which is reused as the first radiator and the second radiator in the antenna module.

[0119] Here, the conductive shell may include a back shell, a middle frame or a frame, and the present disclosure does not limit this. Among them, the first radiator and the second radiator reused by the back shell, the middle frame or the frame may be formed into a patch antenna, an inverted F antenna, a monopole antenna, an LDS antenna, etc., and the embodiments of the present disclosure do not limit this.

[0120] See also Figure 5 , Figure 5 is a schematic diagram of a conductive frame of a terminal device according to an exemplary embodiment; Figure 5 The terminal device 2 includes an antenna module 1 ; a portion of a conductive frame 21 of the terminal device 2 is reused as a first radiator and a second radiator in the antenna module 1 .

[0121] In the embodiment of the present disclosure, part of the conductive frame reused as the first radiator and the second radiator can be Figure 5 The function keys 22 are located on the same side. The function keys 22 include a volume key and a power key.

[0122] The antenna module proposed in the embodiment of the present disclosure may also include other radiators, such as a third radiator. The operating frequency band of the wireless signal received and sent by the third radiator may be the same as, partially overlapped with, or different from the first and second frequency bands, and the present disclosure does not limit this. Here, the rest of the conductive frame may also be reused as the third radiator.

[0123] The disclosed embodiment can reduce the cost and space occupied by separately setting up an antenna module by reusing the conductive shell as the first radiator and the second radiator, which helps to improve the structural utilization of the terminal device and realize the lightweight and thin terminal device.

[0124] In some embodiments, in combination Figure 5 As shown, the conductive housing includes a first frame 211 and a second frame 212;

[0125] The first frame 211 and the second frame 212 are distributed on the same side of the terminal device 2, and there is a gap S between the first frame 211 and the second frame 212;

[0126] A portion of the first frame 211 is reused as a first radiator;

[0127] Another part of the first frame 211 and the second frame 212 are reused as a second radiator.

[0128] It should be noted that when the conductive shell is a conductive frame, the partial conductive frame reused as the above-mentioned antenna module may include a first frame and a second frame.

[0129] Here, the first frame and the second frame are located on the same side, and both are located on the side where the above-mentioned function keys are located. Exemplarily, the first frame and the second frame can be located on the right-hand side of the terminal device.

[0130] In the disclosed embodiment, a portion of the first frame is multiplexed as a first radiator to transmit and receive wireless signals in the high-frequency band; another portion of the first frame is coupled with the second frame under the action of the target feed source, and together they are multiplexed as a second radiator to transmit and receive wireless signals in the medium-frequency band and the low-frequency band. In this way, the structural utilization rate of the terminal device is improved, and the terminal device can realize effective integration of more frequency bands, which helps to broaden the application scenarios of wireless communication and positioning.

[0131] Below, an exemplary embodiment of the antenna module proposed in the present disclosure is described by taking the application of the antenna module proposed in the present disclosure in a mobile phone as an example.

[0132] In the mobile phone of the related art, the working state of the antenna in the mobile phone can be switched by using a tuning switch; however, the tuning function of a tuning switch can only act on the antenna connected to the tuning switch, so as to switch the different frequency bands of the wireless signal received and sent by the antenna. Moreover, in the related art, when there are opposing intermediate frequency (or low frequency) antennas and high frequency antennas, if the opposing antennas are each provided with a tuning switch, the cost is high and more circuit boards are required, which affects the thin and light design of the terminal device; if the high frequency antenna is not provided with a tuning switch, then the high-order harmonics of the wireless signal received and sent by the opposing intermediate frequency (or low frequency) antenna will affect the wireless performance of the high frequency antenna.

[0133] To this end, an exemplary antenna module for use in a mobile phone proposed in an embodiment of the present disclosure includes a first radiator for transmitting and receiving a high frequency band (specifically 5.1 GHz to 5.8 GHz), a second radiator for transmitting and receiving a medium frequency band (specifically 1.7 GHz to 3 GHz) and a low frequency band (specifically 0.3 GHz to 1 GHz), and a tuning switch arranged on the second radiator.

[0134] In some examples, the mobile phone has a metal decoration (DECO), which can be reused as the first radiator and the second radiator; in other examples, the mobile phone also has a metal frame, part of which can be reused as the first radiator and the second radiator.

[0135] See also Figure 1 , Figure 2 and Figure 5 The first radiator 11 and the second radiator 12 share the ground terminal 111 of the first radiator 11, thereby forming an unbalanced end-to-end antenna; no tuning switch is set on the first radiator, and a tuning switch 131 for frequency tuning is set on the second radiator.

[0136] In the embodiment of the present disclosure, the feeding position of the second radiator 12 is set according to an integer multiple of a half wavelength of the wireless signal received and sent by the first radiator 11. Exemplarily, the feeding end 121 of the second radiator 12 is set between the ground end 111 and the slit S, and the distance between the feeding end 121 and the slit S is an integer multiple of a half wavelength of the wireless signal received and sent by the first radiator 11, for example, set to 3 times.

[0137] Here, the present disclosure sets a tuning switch 131 between the feeding end 121 and the target feed source F. When the tuning switch 131 is in different switch states, the standing wave of the first radiator 11 changes. In this way, by adjusting the tuning switch 131, the high-order mode of the wireless signal received and transmitted by the second radiator 12 is outside the high-frequency band received and transmitted by the first radiator 11, thereby reducing the coupling effect between the second radiator 12 and the first radiator 11, and further improving the antenna performance of the first radiator 11. Figure 3 and Figure 4 As shown, the present disclosure can improve the antenna performance of the first radiator 11 without a switch, with the maximum improvement being about 0.5 dB.

[0138] Figure 6 6 is a block diagram of a terminal device according to an exemplary embodiment. For example, the terminal device 600 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.

[0139] Reference Figure 6 The terminal device 600 may include one or more of the following components: a processing component 602 , a memory 604 , a power component 606 , a multimedia component 608 , an audio component 610 , an input / output (I / O) interface 612 , a sensor component 614 , and a communication component 616 .

[0140] The processing component 602 generally controls the overall operation of the terminal device 600, such as operations associated with at least one of display, phone calls, data communications, camera operations, and recording operations. The processing component 602 may include one or more processors 620 to execute instructions to complete all or part of the steps of the above method. In addition, the processing component 602 may include one or more modules to facilitate the interaction between the processing component 602 and other components. For example, the processing component 602 may include a multimedia module to facilitate the interaction between the multimedia component 608 and the processing component 602.

[0141] The memory 604 is configured to store various types of data to support operations on the terminal device 600. Examples of such data include at least one of the following: instructions for any application or method operating on the terminal device 600, contact data, phone book data, messages, pictures, and videos. The memory 604 may be implemented by any type of volatile or non-volatile storage device or a combination thereof, such as a static random access memory (SRAM), an electrically erasable programmable read-only memory (EEPROM), an erasable programmable read-only memory (EPROM), a programmable read-only memory (PROM), a read-only memory (ROM), a magnetic memory, a flash memory, a magnetic disk, or an optical disk.

[0142] The power supply component 606 provides power to various components of the terminal device 600. The power supply component 606 may include at least one of the following: a power management system, one or more power supplies, and other components associated with generating, managing, and distributing power for the terminal device 600.

[0143] The multimedia component 608 includes a screen that provides an output interface between the terminal device 600 and the user. In some embodiments, the screen may include a liquid crystal display (LCD) and a touch panel (TP). If the screen includes a touch panel, the screen may be implemented as a touch screen to receive input signals from the user. The touch panel includes one or more touch sensors to sense touch, slide, and gestures on the touch panel. The touch sensor may not only sense the boundaries of the touch or slide action, but also detect the duration and pressure associated with the touch or slide operation. In some embodiments, the multimedia component 608 includes a front camera and / or a rear camera. When the terminal device 600 is in an operating mode, such as a shooting mode or a video mode, the front camera and / or the rear camera may receive external multimedia data. Each front camera and the rear camera may be a fixed optical lens system or have a focal length and optical zoom capability.

[0144] The audio component 610 is configured to output and / or input audio signals. For example, the audio component 610 includes a microphone (MIC), and when the terminal device 600 is in an operation mode, such as a call mode, a recording mode, and a speech recognition mode, the microphone is configured to receive an external audio signal. The received audio signal can be further stored in the memory 604 or sent via the communication component 616. In some embodiments, the audio component 610 also includes a speaker for outputting audio signals.

[0145] I / O interface 612 provides an interface between processing component 602 and peripheral interface modules, such as keyboards, click wheels, buttons, etc. These buttons may include, but are not limited to, a home button, a volume button, a start button, and a lock button.

[0146] The sensor assembly 614 includes one or more sensors for providing various aspects of status assessment for the terminal device 600. For example, the sensor assembly 614 can detect the open / closed state of the terminal device 600, the relative positioning of the components, such as the display and keypad of the terminal device 600, and the sensor assembly 614 can also detect the position change of the terminal device 600 or a component in the terminal device 600, the presence or absence of contact between the user and the terminal device 600, the orientation or acceleration / deceleration of the terminal device 600, and the temperature change of the terminal device 600. The sensor assembly 614 may include a proximity sensor configured to detect the presence of nearby objects without any physical contact. The sensor assembly 614 may also include an optical sensor, such as a complementary metal oxide semiconductor (CMOS) or a charge coupled device (CCD) image sensor, for use in imaging applications. In some embodiments, the sensor assembly 614 may also include, but is not limited to, at least one of the following: an acceleration sensor, a gyroscope sensor, a magnetic sensor, a pressure sensor, and a temperature sensor.

[0147] The communication component 616 is configured to facilitate communication between the terminal device 600 and other devices in a wired or wireless manner. The terminal device 600 can access a wireless network based on a communication standard, such as Wi-Fi, 4G, 5G, or a combination thereof. In an exemplary embodiment, the communication component 616 receives a broadcast signal or broadcast-related information from an external broadcast management system via a broadcast channel. In an exemplary embodiment, the communication component 616 also includes a near field communication (NFC) module to facilitate short-range communication. For example, the NFC module can be based on radio frequency identification (RFID) technology, infrared data association (IrDA) technology, ultra-wideband (Ultra Wide Band, UWB) technology, Bluetooth (BT) technology and other technologies to achieve.

[0148] In an exemplary embodiment, the terminal device 600 can be implemented by one or more application specific integrated circuits (ASIC), digital signal processors (DSP), digital signal processing devices (DSPD), programmable logic devices (PLD), field programmable gate arrays (FPGA), controllers, microcontrollers, microprocessors or other electronic components.

[0149] In an exemplary embodiment, a non-transitory computer-readable storage medium including instructions is also provided, such as a memory 604 including executable instructions or a computer program, which can be executed by a processor 620 of a terminal device 600 to perform the above method. For example, the non-transitory computer-readable storage medium can be a ROM, a random access memory (RAM), a compact disc read-only memory (CD-ROM), a magnetic tape, a floppy disk, an optical data storage device, etc.

[0150] Those skilled in the art will readily appreciate other embodiments of the present disclosure after considering the specification and practicing the utility model 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 common knowledge or customary technical means in the art that are not disclosed in the present disclosure. The specification and examples are to be regarded as exemplary only, and the true scope and spirit of the present disclosure are indicated by the claims.

[0151] It should be understood that the present disclosure is not limited to the exact structures that have been described above and shown in the drawings, and that various modifications and changes may be made without departing from the scope thereof. The scope of the present disclosure is limited only by the appended claims.

Claims

1. An antenna module, characterized in that: include: A first radiator, used for transmitting and receiving wireless signals in a first frequency band, wherein the first radiator has a ground terminal; A second radiator, disposed at the position of the ground end of the first radiator, having a feeding end; A tuning module is connected between the feeding end and the target feed source, and is used to adjust the frequency of the wireless signal received and sent by the second radiator, so that the center frequency of the higher harmonics generated by the wireless signal received and sent by the second radiator is located outside the first frequency band.

2. The antenna module according to claim 1, characterized in that: The second radiator has a first end and a second end that are arranged opposite to each other; The first end portion is disposed at the position of the ground end of the first radiator; The feeding end is located between the first end and the second end, and the distance between the feeding end and the second end is an integer multiple of half the wavelength of the wireless signal in the first frequency band.

3. The antenna module according to claim 2, characterized in that: The second radiator includes a first branch and a second branch; There is a break between the first branch node and the second branch node; The first end and the second end are two opposite ends of the first branch, and the distance between the first end and the fracture is greater than the distance between the second end and the fracture; Wherein, when the target feed source feeds an excitation signal to the feeding end, the first branch and the second branch jointly transmit and receive wireless signals.

4. The antenna module according to claim 2, characterized in that: The first end is connected to a ground end of the first radiator, and is used to ground the second radiator through the ground end of the first radiator.

5. The antenna module according to any one of claims 1 to 4, characterized in that: The tuning module includes a tuning switch; When the tuning switch is in different switch states, the second radiator transmits and receives wireless signals in different sub-frequency bands within the second frequency band; The frequencies in the second frequency band are smaller than the frequencies in the first frequency band; and the center frequencies of the higher harmonics generated by the wireless signals in the different sub-frequency bands are all outside the first frequency band.

6. The antenna module according to claim 5, characterized in that: When the tuning switch is in different switch states, different capacitances are formed between the feeding end and the target feed source.

7. The antenna module according to claim 6, characterized in that: The different switch states include a first switch state and a second switch state; When the tuning switch is in the first switch state, a capacitor with a first capacitance value is formed between the feeding end and the target feed source; when the tuning switch is in the second switch state, a capacitor with a second capacitance value is formed between the feeding end and the target feed source; The first capacitance value is within a range of 0.4 picofarad to 0.6 picofarad; and the second capacitance value is within a range of 0.8 picofarad to 1.2 picofarad.

8. The antenna module according to any one of claims 1 to 4, characterized in that: The second radiator is an inverted F-shaped radiator.

9. The antenna module according to any one of claims 1 to 4, characterized in that: The first frequency band is within the range of 5.1 GHz to 5.8 GHz.

10. A terminal device, characterized in that: include: The antenna module according to any one of claims 1 to 9; A conductive shell, part of which is reused as the first radiator and the second radiator in the antenna module.

11. The terminal device according to claim 10, characterized in that: The conductive housing includes a first frame and a second frame; The first frame and the second frame are distributed on the same side of the terminal device, and there is a gap between the first frame and the second frame; A portion of the first frame is reused as the first radiator; Another part of the first frame and the second frame are reused together as the second radiator.

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