Antenna assembly, protective sleeve and terminal equipment

Abstract

The invention provides an antenna assembly, and the antenna assembly comprises a dual-frequency resonant WiFi antenna which is disposed in a terminal device. And the suspension branch knot is arranged on the protective sleeve outside the terminal equipment and is used for adjusting the resonant frequency of the dual-frequency resonant WiFi antenna. According to the antenna assembly, the resonant frequency in the dual-frequency resonant WiFi antenna can be adjusted by using the suspension branch knot, so that the power of an antenna signal is improved, the problem that the cost of enhancement of the antenna signal is too high is solved, and the user experience is improved.

Description

Technical Field

[0001] The present application relates to the field of communication technology, and in particular to an antenna assembly, a protective cover and a terminal device. Background Art

[0002] With the promotion of the fifth generation of mobile communication technology, the functions of mobile terminals are becoming more and more abundant. In order to realize the interconnection of all things, the number of antennas inside the terminal has increased to more than ten or even more than twenty. Considering that users pursue a high display screen ratio, they have higher requirements for signal quality. Among them, WiFi and BT antenna performance are key factors in achieving short-distance high-speed wireless communication. In this context, research on how to improve WiFi antenna performance under the existing extremely small clearance is of great significance.

[0003] In the existing terminal WiFi antenna, the WiFi antenna is inside the terminal. Due to the high display screen and the thickness of the whole device, the antenna efficiency is about 35%-45%. In the existing terminal form, whether the existing solution can be improved to further improve the performance of the WiFi antenna has become a problem that needs to be solved urgently.

[0004] Some manufacturers use protective covers with antenna functions to enhance signals, such as 5G protective covers and antenna protective covers. The former uses an eSIM chip and 5G Modem built into the protective cover to use 5G signals, while the latter uses an antenna built into the protective cover to achieve antenna feeding. Both of them set up a complete antenna structure in the protective cover, which greatly increases the cost of antenna signal enhancement.

[0005] The preceding description is intended to provide general background information and does not necessarily constitute prior art. Summary of the invention

[0006] In response to the above technical problems, the present application provides an antenna assembly, a protective cover and a terminal device, which enhance the antenna signal without providing a complete antenna structure in the protective cover, thereby avoiding excessively high costs for antenna signal enhancement.

[0007] In order to solve the above technical problems, the present application provides an antenna assembly, which is applied to a terminal device, and the antenna assembly includes:

[0008] A dual-frequency resonant WiFi antenna is installed in the terminal device;

[0009] The suspended branch is arranged on the protective cover of the terminal device and is used to adjust the resonant frequency of the dual-frequency resonant WiFi antenna.

[0010] Optionally, at least one of the following is specifically included:

[0011] When the protective cover is not used, the resonance of the dual-frequency resonant WiFi antenna does not shift, and the terminal device operates normally;

[0012] When using the protective case, the floating stub adjusts the first resonance frequency in the dual - frequency resonant WiFi antenna to the second resonance frequency.

[0013] Optionally, there is coupled feeding between the dual - frequency resonant WiFi antenna and the floating stub.

[0014] Optionally, the antenna assembly further includes at least one of the following: the dual - frequency resonant WiFi antenna is an FPC antenna or a metal - frame antenna; the floating stub is a rectangular floating stub or an L - shaped floating stub.

[0015] Optionally, the FPC antenna is a monopole dual - stub FPC antenna, an inverted - F - shaped FPC antenna, or a loop - shaped FPC antenna.

[0016] Optionally, the floating stub is arranged on the surface of the protective case by FPC pasting or laser printing.

[0017] Optionally, the carrier of the floating stub is a metal - type device outside the terminal device.

[0018] Optionally, the dual - frequency resonant WiFi antenna is arranged inside the main body of the terminal device or on the metal frame of the terminal device.

[0019] In addition, to achieve the above object, the present application also provides a protective case, on which the floating stub in the antenna assembly is arranged.

[0020] In addition, to achieve the above object, the present application also provides a terminal device, which includes: the dual - frequency resonant WiFi antenna in the antenna assembly.

[0021] As described above, the antenna assembly of the present application, applied to a terminal device, includes: a dual - frequency resonant WiFi antenna, arranged inside the terminal device; a floating stub, arranged on a protective case outside the terminal device, for adjusting the resonance frequency of the dual - frequency resonant WiFi antenna. Through the above - mentioned technical solution, the resonance frequency in the dual - frequency resonant WiFi antenna can be adjusted by the floating stub, thereby increasing the power of the antenna signal, solving the problem of the high cost of avoiding the enhancement of the antenna signal, and further improving the user experience. Description of the Drawings

[0022] The accompanying drawings here are incorporated into the description and form a part of this description, showing embodiments consistent with this application, and are used together with the description to explain the principles of this application. To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, for those of ordinary skill in the art, other accompanying drawings can be obtained based on these drawings without creative efforts.

[0023] Figure 1 Schematic diagram of the structure of the first antenna assembly provided by this application;

[0024] Figure 2 Schematic diagram of the first structure of a complete antenna provided on a protective cover in the prior art;

[0025] Figure 3 Schematic diagram of the second structure of a complete antenna provided on a protective cover in the prior art;

[0026] Figure 4 Schematic diagram of the resonance curve of the WIFI antenna with dual - frequency resonance of this application without a protective cover;

[0027] Figure 5 Schematic diagram of the radiation efficiency curve of the WIFI antenna with dual - frequency resonance of this application without a protective cover;

[0028] Figure 6 Schematic diagram of the resonance curve of the dual - frequency resonance WiFi antenna of this application with a protective cover;

[0029] Figure 7 Schematic diagram of the radiation efficiency curve of the dual - frequency resonance WiFi antenna of this application with a protective cover;

[0030] Figure 8 Schematic diagram of the structure of the protective cover with suspended branches provided by this application;

[0031] Figure 9 Cross - sectional view of the terminal device with an FPC antenna provided by this application;

[0032] Figure 10 Schematic diagram of the structure of the terminal device provided with the first antenna assembly by this application;

[0033] Figure 11 Schematic diagram of the structure of the second antenna assembly provided by this application;

[0034] Figure 12 Schematic diagram of the structure of the terminal device provided with the second antenna assembly by this application;

[0035] Figure 13 Schematic diagram of the structure of the third antenna assembly provided by this application;

[0036] Figure 14 A schematic structural diagram of a terminal device provided with a third antenna component according to the present application;

[0037] Figure 15 A schematic structural diagram of a protective case using a SIM card pin as a floating stub;

[0038] Figure 16 A schematic structural diagram of a protective case with a floating stub on the back;

[0039] Figure 17 A schematic structural diagram of a fourth antenna component provided by the present application;

[0040] Figure 18 A schematic structural diagram of a terminal device provided with a fourth antenna component according to the present application.

[0041] The realization of the purpose of the present application, functional features and advantages will be further described in conjunction with the embodiments with reference to the accompanying drawings. Through the above-mentioned accompanying drawings, the specific embodiments of the present application have been shown, and there will be more detailed descriptions hereinafter. These drawings and text descriptions are not intended to limit the scope of the concept of the present application in any way, but to illustrate the concept of the present application to those skilled in the art by referring to specific embodiments. Detailed implementation manners

[0042] Here, the exemplary embodiments will be described in detail, and the examples are shown in the accompanying drawings. When the following description refers to the accompanying 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 the implementation manners consistent with the present application. On the contrary, they are only examples of the devices and methods consistent with some aspects of the present application as detailed in the appended claims.

[0043] It should be noted that in this article, the term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements not only includes those elements, but also includes other elements not explicitly listed, or further includes elements inherent to such process, method, article or device. Without further limitation, an element defined by the statement "including one..." does not exclude the existence of another identical element in the process, method, article or device including the element. In addition, components, features, and elements with the same name in different embodiments of the present application may have the same meaning or different meanings, and their specific meanings need to be determined according to their explanations in the specific embodiments or further in combination with the context in the specific embodiments.

[0044] It should be understood that although the terms first, second, third, etc. may be used herein to describe various information, such information should not be limited to these terms. These terms are only used to distinguish information of the same type from each other. For example, without departing from the scope of the present disclosure, the first information may also be referred to as the second information, and similarly, the second information may also be referred to as the first information. Depending on the context, the word "if" as used herein may be interpreted as "when" or "upon" or "in response to determining". Furthermore, as used herein, the singular forms "a", "an", and "the" are also intended to include the plural forms unless the context indicates otherwise. It should be further understood that the terms "comprising", "including" indicate the presence of the stated features, steps, operations, elements, components, items, kinds, and / or groups, but do not preclude the presence, occurrence, or addition of one or more other features, steps, operations, elements, components, items, kinds, and / or groups. The terms "or", "and / or", "including at least one of the following" and the like used in the present application may be interpreted inclusively, or mean any one or any combination. For example, "including at least one of the following: A, B, C" means "any one of the following: A; B; C; A and B; A and C; B and C; A and B and C", and again, "A, B or C" or "A, B and / or C" means "any one of the following: A; B; C; A and B; A and C; B and C; A and B and C". An exception to this definition occurs only when the combination of elements, functions, steps, or operations is inherently mutually exclusive in some way.

[0045] Depending on the context, the words "if", "when" as used herein may be interpreted as "when" or "upon" or "in response to determining" or "in response to detecting". Similarly, depending on the context, the phrase "if determined" or "if detected (stated condition or event)" may be interpreted as "when determined" or "in response to determining" or "when detecting (stated condition or event)" or "in response to detecting (stated condition or event)".

[0046] It should be understood that the specific embodiments described herein are only for explaining the present application and are not used to limit the present application.

[0047] In the following description, the suffixes such as "module", "component", or "unit" used to denote elements are only for the convenience of explaining the present application and have no specific meaning in themselves. Therefore, "module", "component", or "unit" may be used interchangeably.

[0048] The terminal device can be implemented in various forms. For example, the terminal devices described in this application can include terminal devices with WiFi antennas such as mobile phones, tablet computers, laptop computers, palmtop computers, personal digital assistants (PDAs), portable media players (PMPs), navigation devices, wearable devices, smart bracelets, pedometers, etc.

[0049] In the following description, the terminal device will be taken as an example for illustration. Those skilled in the art will understand that, except for the components specifically for mobile purposes, the structure according to the embodiments of the present application can also be applied to fixed-type terminals.

[0050] Embodiment 1

[0051] Please refer to Figure 1 , which is a schematic diagram of the hardware structure of the antenna assembly for implementing Embodiment 1 of the present application. Based on Figure 1 Embodiment 1 of the antenna assembly of the present invention is proposed.

[0052] In Embodiment 1, the antenna assembly includes: a dual-band resonant WiFi antenna 10 disposed inside the terminal device;

[0053] A floating stub 20 disposed on the protective cover outside the terminal device for adjusting the resonant frequency of the dual-band resonant WiFi antenna.

[0054] It should be understood that WiFi belongs to a short-range wireless transmission technology. The mobile terminal can help users send and receive emails, browse web pages, and access streaming media through the WiFi module. It provides users with wireless broadband Internet access. The WiFi antenna 10 is a hardware antenna for data transmission and reception in the WiFi communication mode. Usually, the WiFi antenna 10 is disposed inside the main body of the terminal device. Limited by the high proportion of the display screen and the thickness of the whole machine of the terminal device, the antenna efficiency is about 35%-45%. It is difficult to further improve the antenna efficiency of the WiFi antenna inside the terminal device to achieve the effect of increasing the antenna signal power. Therefore, referring to Figure 2 and Figure 3 , in order to increase the power of the antenna signal, an additional WiFi antenna 10 needs to be disposed outside the device, and the external WiFi antenna 10 is used to increase the power of the antenna signal to meet the usage requirements of users. However, setting a complete WiFi antenna 10 outside the terminal device to increase the antenna efficiency power is very costly. In Figure 2 there is also a socket 30, a main board, and a chip 40; in Figure 3 there is also a socket 30, where the socket 30 is an antenna feed interface.

[0055] It should be noted that the WiFi antenna 10 can usually generate resonances of multiple frequencies through settings, such as the commonly used 2.4 GHz and 5 GHz. In the embodiments of the present application, the WiFi antenna 10 exactly adopts an antenna with dual - frequency resonance function. The first resonance frequency and the second resonance frequency are the resonance frequencies generated by the WiFi antenna 10, and in the specific implementation process, dual - frequency resonance can be achieved by limiting the structure of the antenna.

[0056] It can be understood that the floating stub 20 is a component used to improve the signal receiving ability of the antenna. At the front end of the antenna, since the signal intensity of the antenna signal may drop significantly during transmission, resulting in a very weak signal received by the antenna. In this case, the setting of the floating stub 20 can effectively improve the signal receiving ability of the antenna. The floating stub 20 is connected to the WiFi antenna 10, which can adjust the overall structure of the antenna assembly, thereby adjusting the resonance frequency in the WiFi antenna 10.

[0057] During the process of improving the antenna signal power, the floating stub 20 is connected to the WiFi antenna 10. The floating stub 20 adjusts one resonance frequency generated by the WiFi antenna 10 to another resonance frequency, thereby achieving the superposition of resonance frequencies and improving the power of the antenna signal.

[0058] In Embodiment 1, a specific antenna assembly is recorded. The antenna assembly includes: a dual - frequency resonance WiFi antenna, which is arranged inside the terminal device; a floating stub, which is arranged on the protective cover outside the terminal device and is used to adjust the resonance frequency of the dual - frequency resonance WiFi antenna. Through the above technical solution, the resonance frequency in the dual - frequency resonance WiFi antenna can be adjusted by using the floating stub, thereby improving the power of the antenna signal, solving the problem of the too - high cost of avoiding the enhancement of the antenna signal, and further improving the user experience.

[0059] Embodiment 2

[0060] Refer to Figures 4 to 7 , based on Embodiment 1 of the above - mentioned antenna assembly, Embodiment 2 of the antenna assembly of the present application is proposed.

[0061] In Embodiment 2, considering that the floating stub 20 is arranged on the protective cover outside the terminal device, when the protective cover is not in use, the floating stub 20 may not be able to establish a normal connection with the WiFi antenna 10, and at this time, the terminal device can work normally; while in the case of using the protective cover, the floating stub 20 can establish a normal connection with the WiFi antenna 10, and then adjust the resonance frequency of the WiFi antenna 10.

[0062] Therefore, in Embodiment 2, the antenna assembly specifically includes at least one of the following:

[0063] When the protective case is not used, the resonance of the dual - frequency resonant WiFi antenna 10 does not shift, and the terminal device operates normally; when the protective case is used, the floating stub 20 adjusts the first resonance frequency in the dual - frequency resonant WiFi antenna 10 to the second resonance frequency.

[0064] In the second embodiment, the floating stub 20 is used to adjust the first resonance frequency in the dual - frequency resonant WiFi antenna 10 to the second resonance frequency. The second resonance frequency is the normal operating frequency of the WiFi antenna 10, and the second resonance frequency can be 2.4 GHz or 5 GHz. The first resonance frequency is the auxiliary resonance frequency, and the first resonance frequency is close to the second resonance frequency. The first resonance frequency can be shifted to the second resonance frequency by adjusting the antenna structure with the floating stub 20. For example, when the second resonance frequency can be 2.4 GHz, the first resonance frequency can be set to 2.7 GHz; for another example, when the second resonance frequency can be 5 GHz, the first resonance frequency can be set to 5.2 GHz. Therefore, in this application, the function of the floating stub 20 is to adjust the first resonance frequency generated by the WiFi antenna 10.

[0065] During the process of increasing the antenna signal power, the floating stub 20 is connected to the WiFi antenna 10. The floating stub 20 adjusts the first resonance frequency generated by the WiFi antenna 10 to the second resonance frequency, so as to superimpose the signal powers of the first resonance frequency and the second resonance frequency, and improve the power of the antenna signal. Refer to Figures 4 to Figure 7 , according to Figure 4 and Figure 6 it can be known that after adding the protective case provided with the floating stub 20, the frequency resonance of 2.7 GHz of the WiFi antenna 10 will shift to 2.4 GHz, and then synthesize a wider and deeper frequency resonance; according to Figure 5 and Figure 7 it can be known that the efficiency of the WiFi antenna 10 is greatly improved, and the measured active emission power is increased by 2 dB.

[0066] The floating stub 20 is arranged on the surface of the protective case and does not occupy the space of the protective case. In this case, the performance of the WiFi antenna 10 without the protective case is equivalent to that of a normal mobile phone. After adding the protective case, the transmission power of the WiFi antenna can be effectively improved.

[0067] Refer to Figure 8 , in some embodiments, the floating stub 20 can be arranged on the surface of the protective case by FPC pasting or laser printing. In Figure 8The floating stub 20 is disposed on the surface of the side of the protective cover, and this position is opposite to the position of the WiFi antenna 10 in the terminal device body. Of course, the floating stub 20 can also be arranged in other ways, and it is only necessary to fix the floating stub 20 on the surface of the protective cover to establish a connection with the WiFi antenna 10.

[0068] In addition, the dual-band resonant WiFi antenna 10 is connected to the floating stub 20, and mainly uses the WiFi antenna 10 to feed the floating stub 20. The specific connection method can be to set sockets on both the terminal device and the protective cover as antenna feed interfaces, and connect them through a power supply circuit, so as to use the voltage on the WiFi antenna 10 to feed the floating stub 20. For example, an antenna feed interface connected to the WiFi antenna 10 is reserved on the mobile phone, and an antenna feed interface connected to the floating stub 20 is set on the protective cover. When the two antenna feed interfaces are connected, the WiFi antenna 10 feeds the floating stub 20.

[0069] Furthermore, considering that the feeding process of the floating stub 20 requires setting additional sockets as antenna feed interfaces and connecting wires, the antenna feed interfaces and connecting wires not only have certain cost problems, but also affect the appearance of the terminal device and the risk of wear and dirt caused by long-term use of the antenna feed interfaces. In order to further reduce the cost of improving the antenna signal power and the impact on the appearance and sockets of the terminal device, in some embodiments, a connection can also be established between the dual-band resonant WiFi antenna 10 and the floating stub 20 in a coupling manner, and the floating stub 20 is fed by means of coupled feeding, which can not only reduce the feeding cost of the floating stub 20, but also avoid the normal feeding of the floating stub 20 caused by wear of the antenna feed interface during long-term use.

[0070] Embodiment Three

[0071] Based on any of the above embodiments of the antenna assembly, Embodiment Three of the antenna assembly of the present application is proposed.

[0072] In Embodiment Three, considering that the WiFi antenna 10 needs to be arranged in the terminal device and the space in the body of the terminal device is limited, in order to facilitate the arrangement of the WiFi antenna 10, the dual-band resonant WiFi antenna 10 can be arranged as an FPC antenna 11. Utilizing the advantage of the FPC antenna 11 being resistant to bending, the space in the terminal device body can be better utilized.

[0073] In Figure 9 , the FPC antenna 11 can be arranged on one side of the battery cover 6; the antenna fingers 12 of the FPC antenna 11 are in contact with the PCB substrate 4 through the elastic sheet 3, and the PCB substrate 4 can be arranged on the middle frame 5 of the terminal.

[0074] Among them, the elastic piece 3 is composed of a conductive structure and can transmit information between the PCB substrate 4 and the FPC antenna 11, so as to achieve the antenna radiation effect.

[0075] It can be understood that considering that the internal structures of different terminal devices are not the same, the spatial structures for setting the FPC antenna 11 may also be different. Therefore, the structure presented by the FPC antenna 11 in the terminal device body may change with different terminal devices. When the structure of the FPC antenna 11 changes, the effect of the floating stub 20 on improving the antenna signal power may also change. Therefore, during the setting process of the antenna assembly, it is necessary to set the FPC antenna 11 with different traces and the floating stub 20 with different structures according to the specific terminal device. In this embodiment, the FPC antenna 11 can be set in the terminal device first, and then the structure of the floating stub 20 can be determined according to the specific trace structure of the FPC antenna 11. During the process of determining the structure of the floating stub 20, the structure with the best improvement in the antenna signal power of the WiFi antenna can be selected through multiple tests.

[0076] Refer to Figure 1 and Figure 10 , considering that the structures of the FPC antennas 11 set in the specific terminal device body are not the same. In some embodiments, the FPC antenna is a monopole dual stub FPC antenna, or an inverted F-shaped FPC antenna, or a ring-shaped FPC antenna.

[0077] Figure 1 In, the FPC antenna 11 is a monopole dual stub FPC antenna pasted on the battery cover 6 and can generate dual-frequency resonance. The floating stub 20 can be a rectangular stub of 2mm * 25mm. The floating stub 20 can be pasted or laser printed on the side of the protective cover by using the FPC process. Setting in this way can reduce the manufacturing process complexity and cost of the antenna assembly. The long side stub and the short side stub of the FPC antenna 11 can be perpendicularly arranged to each other, and the floating stub 20 can be perpendicularly arranged to the short side stub of the FPC antenna 11, that is, the floating stub 20 can be parallel to the long side stub of the FPC antenna 11.

[0078] When the WiFi antenna 10 generates dual-frequency resonance at 2.4 GHz and 2.7 GHz, the resonance of the 2.7 GHz frequency in the WiFi antenna 10 without the protective cover will not shift, and the performance of the WiFi antenna 10 is equivalent to that of a normal mobile phone. After adding the protective cover, the resonance of the 2.7 GHz frequency will shift to the resonance of the 2.4 GHz frequency, and at this time, the WiFi transmission power can be increased by about 2 dB.

[0079] Refer to Figure 11 and Figure 12, considering that the structures of the FPC antennas 11 provided inside the specific terminal devices are different. In some embodiments, the FPC antenna 11 can also be set as an inverted-F shaped FPC antenna, and the floating stub 20 can be correspondingly set as an L-shaped floating stub.

[0080] In Figure 11 and Figure 12 , the FPC antenna 11 is an inverted-F shaped FPC antenna pasted on the battery cover 6, which can generate dual-frequency resonance. The floating stub 20 adopts an L-shaped floating stub, and the size of its long-side stub can be 2mm * 25mm. The specific structures of the FPC antenna 11 and the floating stub 20 can be referred to Figure 11 . Similarly, the floating stub 20 can be pasted or laser-printed on the side of the protective case by using the FPC process. Setting in this way can reduce the manufacturing process complexity and cost of the antenna assembly.

[0081] Taking the WiFi antenna 10 generating 2.4GHz and 2.7GHz dual-frequency resonance as an example for illustration, the resonance of the 2.7GHz frequency in the WiFi antenna 10 without the protective case will not shift, and the performance of the WiFi antenna 10 is comparable to that of a normal mobile phone. After adding the protective case, the resonance of the 2.7GHz frequency will shift to the resonance of the 2.4GHz frequency, and at this time, the WiFi transmission power can be increased by about 1.5dB.

[0082] Referring to Figure 13 and Figure 14 , considering that the structures of the FPC antennas 11 provided inside the specific terminal devices are different. In some embodiments, the FPC antenna 11 is a ring-shaped FPC antenna, and the floating stub 20 is an L-shaped floating stub.

[0083] In Figure 13 and Figure 14 , the FPC antenna 11 is a ring-shaped FPC antenna pasted on the battery cover 6, which can generate dual-frequency resonance. The floating stub 20 adopts an L-shaped floating stub, and the size of its long-side stub can be 2mm * 25mm. The specific structures of the FPC antenna 11 and the floating stub 20 can be referred to Figure 13 . Similarly, the floating stub 20 can be pasted or laser-printed on the side of the protective case by using the FPC process. Setting in this way can reduce the manufacturing process complexity and cost of the antenna assembly.

[0084] Taking the WiFi antenna 10 generating 2.4GHz and 2.7GHz dual-frequency resonance as an example for illustration, the resonance of the 2.7GHz frequency in the WiFi antenna 10 without the protective case will not shift, and the performance of the WiFi antenna 10 is comparable to that of a normal mobile phone. After adding the protective case, the resonance of the 2.7GHz frequency will shift to the resonance of the 2.4GHz frequency, and at this time, the WiFi transmission power can be increased by about 1.6dB.

[0085] In the third embodiment, according to different terminal devices, the specific form and routing structure of the WiFi antenna 10 are defined, and then the structure of the corresponding floating stub 20 is set. When the internal structures of the terminal device bodies are different, the power of the antenna signal can be improved as much as possible.

[0086] In addition, in some embodiments, considering that some metal devices arranged outside the terminal device may be needed during the use of the device terminal, the floating stub 20 can be made of such metal devices. For example, metal ornaments, SIM card pins, etc. Refer to Figure 15 , Figure 15 In, the SIM card pin is used as a carrier to make the floating stub 20. The floating stub 20 made of the SIM card pin can be arranged on the protective case by means of pasting. When the SIM card pin is needed, the floating stub 20 can be removed and used as the SIM card pin. When the SIM card pin does not need to be removed, the floating stub 20 made of the SIM card pin can adjust the first resonance frequency of the dual-band resonant WiFi antenna 10 to the second resonance frequency, thereby improving the power of the antenna signal at the second resonance frequency.

[0087] Further, refer to Figure 16 In some embodiments, the floating stub 20 can also be arranged on the back of the protective case. By defining the position of the dual-band resonant WiFi antenna 10 in the terminal device, the floating stub 20 is fed by the WiFi antenna 10. When the protective case is installed, the floating stub 20 arranged on the protective case adjusts the first resonance frequency of the dual-band resonant WiFi antenna 10 to the second resonance frequency, thereby improving the power of the antenna signal at the second resonance frequency.

[0088] In addition, in the above embodiments, the dual-band resonant WiFi antenna 10 is arranged in the terminal device body, and the space in the terminal device body is used to arrange the dual-band resonant WiFi antenna 10. Considering that the antenna can be arranged not only inside the terminal device body, but also on the metal frame of the terminal device body, the metal frame is used as the antenna for radiation.

[0089] Therefore, refer to Figure 17 and Figure 18 In the third embodiment, the dual-band resonant WiFi antenna 10 can also be arranged on the metal frame as a metal frame antenna. Correspondingly, the floating stub 20 can be arranged as a rectangular floating stub, and the two are fed by a coupling method. By arranging the WiFi antenna 10 on the metal frame, the space requirement for the inside of the terminal device body can be further reduced.

[0090] When the dual - frequency resonant WiFi antenna 10 is a metal - frame antenna, the power of the antenna signal can also be enhanced. Taking the dual - frequency resonance of 2.4 GHz and 2.7 GHz generated by the WiFi antenna 10 as an example for illustration. The resonance of the 2.7 - GHz frequency in the WiFi antenna 10 without a protective case does not shift, and the performance of the WiFi antenna 10 is comparable to that of a normal mobile phone. After adding the protective case, the resonance of the 2.7 - GHz frequency shifts to the resonance of the 2.4 - GHz frequency, and at this time, the WiFi transmission power can be increased by about 1.8 dB. Although the setting methods of the dual - frequency resonant WiFi antenna 10 are different, it does not affect the increase in the WiFi transmission power. In Figure 18 , the floating stub 20 can be arranged on the lower side of the discontinuous seam 50 on the metal frame.

[0091] When the internal space of the terminal device is too limited, by arranging the dual - frequency resonant WiFi antenna 10 on the metal frame of the terminal device, the corresponding floating stub 20 can be set as a rectangular floating stub, and the WiFi transmission power can also be effectively increased.

[0092] In addition, to achieve the above - mentioned purpose, based on the above - mentioned Embodiments 1 to 3, the present application also proposes a protective case, and the floating stub 20 in the antenna assembly described in any one of Embodiments 1 to 3 is arranged on the protective case. The specific structure of this protective case can be referred to in the attached Figure 8 、 15 、16.

[0093] The protective case proposed by the present application has the function of the floating stub 20 in the antenna assembly described in any one of the above - mentioned Embodiments 1 to 3. The specific implementation manners can be referred to Embodiments 1 to 3, and will not be elaborated here.

[0094] In addition, to achieve the above - mentioned purpose, based on the above - mentioned Embodiments 1 to 3, the present application also proposes a terminal device, and the terminal device includes: a dual - frequency resonant WiFi antenna in the antenna assembly described in any one of Embodiments 1 to 3. The specific implementation manners of this WiFi antenna can be referred to Embodiments 1 to 3, and will not be elaborated here.

[0095] The above are only the preferred embodiments of the present application, and do not limit the patent scope of the present application accordingly. Any equivalent structural or equivalent process transformation made by using the content of the specification and drawings of the present application, or directly or indirectly applied in other related technical fields, shall be equally included in the patent protection scope of the present application.

Claims

1. An antenna assembly, characterized in that, Comprising: A dual-frequency resonant WiFi antenna, disposed within a terminal device; Floating stubs, disposed on a protective cover outside the terminal device, for adjusting the resonant frequency of the dual-frequency resonant WiFi antenna.

2. The antenna assembly according to claim 1, wherein Specifically including at least one of the following: When the protective cover is not used, the resonance of the dual-frequency resonant WiFi antenna does not shift, and the terminal device operates normally; When the protective cover is used, the floating stubs adjust the first resonant frequency in the dual-frequency resonant WiFi antenna to the second resonant frequency.

3. The antenna assembly according to claim 1 or 2, characterized in that, There is coupled feeding between the dual-frequency resonant WiFi antenna and the floating stubs.

4. The antenna assembly according to claim 1, wherein, It further includes at least one of the following: The dual-frequency resonant WiFi antenna is an FPC antenna or a metal frame antenna; The floating stubs are rectangular floating stubs or L-shaped floating stubs.

5. The antenna assembly according to claim 4, wherein, The FPC antenna is a monopole dual-stub FPC antenna, or an inverted-F shaped FPC antenna, or a loop FPC antenna.

6. The antenna assembly according to any one of claims 1-5, characterized in that, The floating stubs are disposed on the surface of the protective cover by FPC pasting or laser printing.

7. The antenna assembly according to any one of claims 1-5, characterized in that, The carrier of the floating stubs is a metal-like device outside the terminal device.

8. The antenna assembly according to any one of claims 1-5, characterized in that, The dual-frequency resonant WiFi antenna is disposed inside the main body of the terminal device, or on the metal frame of the terminal device.

9. A protective cover, characterized in that, The protective cover is provided with the floating stubs in the antenna assembly according to any one of claims 1-8.

10. A terminal device, characterized in that, Comprising: The dual-frequency resonant WiFi antenna in the antenna assembly according to any one of claims 1-8.

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